HOFUF CEMENT PLANT 5 th & 6 th EXTENSION PROJECT Burning System 烧成系统 Burning System 1. 概述 General 烧成系统包括生料均化库的生料出库系统和生料入窑(337/338 子项)、烧成窑尾(417/418 子 项)、烧成窑中(437/438 子项)、烧成窑头(447/448 子项)、熟料库及熟料输送的进库系统(457/458 子项)、旁路放风及回灰输送(427/428)共 6 个子项。 本系统的核心部分:烧成窑尾、烧成窑中、烧成窑头的主机分别由 SINOMA 提供了在线旋喷 式分解炉和双系列六级预热器组合成的窑外分解系统;SINOMA 提供了 Φ6.2×92m 回转窑;IKN 提 供了中部带辊式破碎机的推动篦式冷却机; PILLARD 提供了窑和分解炉燃烧器系统等,另外配置有 旁路放风系统。 本操作规程是根据本系统特点和要求,为保证系统正常运行和生产而提出的主要操作事项。操 作人员须在全面掌握规程中各项操作要领的同时,还必须通晓系统中每台设备的性能和操作维护等 方法与要求,以便在实际生产操作中能及时解决随时可能出现的各种问题,并可根据实际情况灵活 调整,系统中每台设备性能和操作维护的详细方法与要求,请参阅各相应设备供货厂商另行提供的 单机使用说明书。当其内容与本操作手册有矛盾时,以设备供货厂商提供的单机使用说明书为准。 本操作手册仅限于 HOFUF CEMENT PLANT 5TH/6TH EXTENSION PROJECT 2×10000t/d 熟料水泥生产线的烧成系统生产操作使用。 The burning system includes the raw meal delivery system of a raw meal homogenizing storage and a total of six subitems, such as raw meal into kiln (Subitem 337/338), calcinating kiln inlet (Subitem 417/418), calcinating kiln middle (Subitem 437/438), calcinating kiln outlet (Subitem 447/448), clinker storage and storage entry system for clinker conveyance (Subitem 457/458), and bypass and returned ash conveyance (Subitem 427/428). For the core part of this system, the main machines for the calcinating kiln inlet, calcinating kiln middle and calcinating kiln outlet, SINOMA has provided the on-line rotary spray precalciner and the outside-the-kiln decomposition system combined by Two-string six-stage preheaters , SINOMA has provided the Φ 6.2 × 92 m rotary kiln, IKN has provided the pendulum grate cooler for the middle roll crusher, and PILLARD has provided the kilns the precalciner burner system, etc. Besides, a bypass system has been arranged. This operating procedure has some main items put forward according to this system’s characteristics and requirements, and for ensuring its normal running and production. An operator shall thoroughly understand the performance, operation, maintenance and so on of each piece of equipment in the system at the time of grasping various operating essentials in the procedure so as to in time solve various problems that may appear at any time in actual production and operation, and according to an actual circumstance, shall make flexible adjustment. For the detailed methods and requirements for the performance, operation and maintenance of each piece of equipment in the system, please refer to a single machine instruction book provided by a corresponding equipment supplier. If the contents of the book with those of the single machine instruction book provided by equipment supplier conflict, those of the single machine instruction 1 / 120
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
The burning system includes the raw meal delivery system of a raw meal homogenizing storage and a total of six subitems, such as raw meal into kiln (Subitem 337/338), calcinating kiln inlet (Subitem 417/418), calcinating kiln middle (Subitem 437/438), calcinating kiln outlet (Subitem 447/448), clinker storage and storage entry system for clinker conveyance (Subitem 457/458), and bypass and returned ash conveyance (Subitem 427/428).
For the core part of this system, the main machines for the calcinating kiln inlet, calcinating kiln middle and calcinating kiln outlet, SINOMA has provided the on-line rotary spray precalciner and the outside-the-kiln decomposition system combined by Two-string six-stage preheaters , SINOMA has provided the Φ 6.2 × 92 m rotary kiln, IKN has provided the pendulum grate cooler for the middle roll crusher, and PILLARD has provided the kilns the precalciner burner system, etc. Besides, a bypass system has been arranged.
This operating procedure has some main items put forward according to this system’s characteristics and requirements, and for ensuring its normal running and production. An operator shall thoroughly understand the performance, operation, maintenance and so on of each piece of equipment in the system at the time of grasping various operating essentials in the procedure so as to in time solve various problems that may appear at any time in actual production and operation, and according to an actual circumstance, shall make flexible adjustment. For the detailed methods and requirements for the performance, operation and maintenance of each piece of equipment in the system, please refer to a single machine instruction book provided by a corresponding equipment supplier. If the contents of the book with those of the single machine instruction book provided by equipment supplier conflict, those of the single machine instruction
1 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
book provided by equipment supplier will be finalized.
This operating manual is used only for the production and operation of the burning system of the clinker cement production line in the Hofuf Cement Plant 5th/6th Extension Project 2 ×10,000 t/d.
2.生产工艺流程简述 Brief Description of Production Process Flow
The range of the burning system starts from raw meal gas filling and unloading in the homogenizing storage, preheating in the predecomposition system, the calcination into cement clinker in the rotary kiln after precalcining system, the cooling and crushing of the pendulum grate cooler, and ends at the sending to the top of the clinker storage by the chain bucket conveyor.
This system may be divided into the six parts, including raw meal into kiln, raw meal preheating and precalcining (calcinating kiln inlet), kiln outlet hot wind introduction into the precalciner (tertiary air duct) and clinker calcination (calcinating kiln middle), clinker cooling, waste gas treatment and kiln outlet combustion system (calcinating kiln outlet), clinker conveyance, bypass, and returned ash conveyance.
The range of the burning system starts from raw meal gas filling and unloading in the homogenizing storage, preheating,precalcining in the system, the calcination into cement clinker in the rotary kiln system, the cooling and crushing of the pendulum grate cooler, and ends at the sending to the top of the clinker storage by the chain bucket conveyor.
This system may be divided into the six parts of raw meal kiln entry, raw meal preheating and precalcining (calcinating kiln inlet), the hot air out of kiln outlet introduced into the precalciner (tertiary air duct) and clinker calcination (calcinating kiln middle), clinker cooling, waste gas treatment and kiln outlet combustion system (calcinating kiln outlet), clinker conveyance, bypass, and returned ash conveyance.
A Φ28m continuous raw meal homogenizing storage (337 SB1/338 SB1) with a storage capacity of 40,000t has been built. An raw meal passes the storage bottom outer ring area for alternation zoning gas filling and equalization, enters the central blending bin, and after the gas filling and uniform agitation in the bin, is unloaded from the flow control valves(337 DV1, DV2/338 DV1, DV2). DV1 and DV2 is on stand by for each other. The unloading capacity is 1,000t/h. The unloaded material enters the raw meal measuring bin (337 BI1/338 BI1) through the air slide (337 AS2/338 AS2) and the belt bucket elevators (337 BE4/338 BE4) and through the the air slide (337 AS3/338 AS3). The capacity of the measuring bin is 250m3 .The weighing sensors(337 LI1/338 LI1) in the measuring bin control the spans of the storage bottom flow valves(337 DV1, DV2, /338 DV1, DV2) to ensure that the measuring bin has a relatively fixed material level. An raw meal in the measuring bin passes the bottom flow control valves(337 DV3, DV4, DV5/338 DV3, DV4, DV5),the solid flow rate gages(337 FM1, FM2, FM3/338 FM1, FM2, FM3), then is transported through the the air slide (337 AY1, AY2, AS4, AS5, AS6/338 AY1, AY2, AS4, AS5, AS6),belt bucket elevators (337BE5,BE6,BE7/338BE5,BE6,BE7) and the preheater top chute(337 AS7, AS8/338 AS7, AS8), and finally is fed into the kiln inlet double series preheaters(417 PH1s/418 PH1s) through the rotary air-lock valve (337RF7,RF8/338RF7,RF8) and the pneumatic paddle valves (337 SGL, SGM/337 SGL, SGM) respectively. For the flow control valve of on the measuring bin bottom and the feeding elevators, two of them are in use and one is on stand by. Among them, the flow control valves on the measuring bin bottom (337 DV3/338 DV3), solid flow rate gages (337 FM1/338 FM1), the air slide (337 AS4/338 AS4) and the feeding elevator s(337 BE6/338 BE6) are standby systems. In addition, an elevator outlet is equipped with many dynamoelectric switch valves, used for determining whether a raw meal is to go into a kiln or return to the homogenizing storage.
A flow signal of a solid flow gage controls the span of a storage bottom flow control valve to ensure that an raw meal is stably fed into the kiln inlet system at a preset flow rate. The aim of a standby outlet built on the measuring bin bottom is that when the main outlet has a fault, an raw meal will be fed in via a standby outlet.
2.2 生料预热与分解(烧成窑尾)Preheating and precalcining of Raw Meals (Calcinating Kiln Inlet)
窑尾系统采用双系列六级预热器,由旋风筒及连接管道、料管以及在线旋喷式分解炉等构成。
3 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
The kiln inlet system uses double-serial six- stage preheaters and consists of cyclones, connecting pipes, feeding pipes, an on-line rotary spray precalciner, etc. A top cyclone is Class 1, namely C1, and a bottom cyclone is Class 6, namely C6. The specifications of a: 4-C1: Φ 6200 mm, 2-C2, C3: Φ 8400 mm, 2-C4: Φ 8800 mm, 2-C5, C6:Φ 9000 mm. After measurement, raw meal powder is sent into a C2 cyclone gas outlet pipe from such conveyance equipment as an elevator, etc. is immediately dispersed and suspended in an air flow by the agency of the air flow, and with the air flow, enters a C1 cyclone. The material powder passes a heavy bob flap valve to enter a C3 cyclone gas outlet pipe after the separation material out off gas, and with an air flow, enters a C2 cyclone. Thus after five-level heat exchange, raw meal powder receives full preheating, and after the separation of a C5 cyclone gasified material and through a heavy bob flap valve, is fed into the precalciner. After a material absorbs heat and is decomposed in the precalciner, it will enter a C6 cyclone, and after separation, it will be fed into a kiln. At this time, the decomposition rate of the material can attain to 95% or so. And the waste gas will rise along various cyclones and gas outlet pipes, and finally is discharged by one air duct and sent by high temperature induce draft fan (337 IF1s, IF2/338 IF1s, IF2) to a raw material powder mill and a kiln inlet waste gas treating system.
In order to prevent an air flow from returning along a discharging pipe so as to influence the separation efficiency, a discharging pipe in each cyclone is equipped with a flap valve with heavy bob balance. In normal production, check whether the movement of each flap valve motion is vivid or not. When it's necessary, adjust the position of a heavy bob and make sure that the movement range of a flap valve is small and frequent so as to ensure a material flow is smooth, continuous and even and to avoid significant pulse discharge. In order to prevent the conic section of a cyclone and a discharging pipe from surface crusting and blockage, the inflection points at the conic sections of the C6~ C3 cyclones and C6~ C4 cyclone discharging pipes are equipped with air cannon(417 BQ1~ K/418 BQ1~K) blockage-clearing system.
The precalciner(Φ 8.8×37 m) uses the on-line rotary spray form. The tertiary air needed by the combustion in the precalciner enters the two sides of the conic section in a disrotatory way, forming a spiraling-up air current. The fumes from the kiln inlet smoke chamber go in from the bed of the precalciner and are wrapped up in the middle, making the oxygen concentration form a distribution of being high on the outer ring and low at the center. The lower part of a precalciner column is equipped with 4 burners (417 BU 1~4/418 BU 1~4) at intervals of 90 °with each other. The ejected air current from the 4 burners forms a rotary flow field. The annular rich oxygen concentration zone provides a good combustion condition for the annular flame zone that the 4 burners form. A material is fed in from the two sides of the lower part of the precalciner columns. Because of the descending inertia resulted in by a feeding falling head, the moment the material goes into the furnace, it is struck onto the distribution board and dispersed. The spiraling-up air current from the furnace bottom enhances the dispersion effects, and together with a rising air flow, is quickly decomposed in an ascending air current.
The 4 burners arranged for the precalciner was supplied by Pillard, and they can burn crude oil and natural gas. The total capacity of the burners: 260 GJ/h, the burnt oil capacity of each burner(5200 kg/h, normal;5900 kg/h, max)or the burnt gas capacity (6900 Nm3/h, normal;7900 Nm3/h, max). While the 4 burners are burning oil or gas, they are respectively controlled by 4 small valve train for burning oil( 417 VT 2~5/418 VT 2~5) or 4 for burning gas((417VT7~a/418VT7~a).The 4 small valve train for burning oil or gas are controlled by the big valve train for burning oil(417 VT1/418 VT1) or for burning gas(417 VT6/418 VT6). The crude oil is sent by the duplex high pressure pumps (L37FP1/ L38FP1)special for the precalciner to the big valve train used for burning oil. Under a general circumstance, the adjustment of a fuel quantity is carried out by adjusting a flow rate valve of a big valve train in the central control room, while a valve of a small valve train needs to be adjusted on the spot. Usually, the debugging is kept fundamentally constant. From an indicating instrument of a valve train, you can judge the operating state of each burner. 4~6% of the burnable air of the burners is provided by the burner fan (417 FN1/418 FN1). The performance parameters of the fan are: air volume: 473.3 m3/min, air pressure:12,000 Pa, power:160 kW. In addition to providing burnable air for the burners, the fan is used for the cooling of a burner after the system’s normal or disorderly closedown.
5 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
The outlet air duct of each cyclone in the precalcining system is furnished with temperature and pressure measuring points, the conic section of a cyclone has pressure measuring points and a discharging pipe has temperature measuring points. A kiln inlet smoke chamber, a precalciner outlet or a C1 outlet air duct is equipped with an on-line gas analysis instrument, and a C6 discharging pipe is furnished with an on-line hot material sample-taking and sample-sending systems, which can at any time monitor the preheating, calcination, decomposition and operation in a system.
Under a normal circumstance, the total resistance loss of the system is 5800~6500Pa, the outlet air duct of C1 dust content is about 70 g/ Nm3, and the exhaust temperature is 280-310 ℃.The furnace outlet temperature can be controlled at 860-880 ℃, and the apparent decomposition rate for a kiln-entering material can reach 90% or above.
As in the raw material for this project, the chlorine content has exceeded the standard, bypass air vents have been built on a kiln inlet ascending smoke flue. For the contents of this part, see the special-subject introduction at the back.
Though the project is equipped with a bypass system, it is necessary to fully value the surface crusting and blockage phenomena that may occur in the procedure in production and sternly guard against them in production and operation. Generally, a part of the system with easy surface crusting or blockage has ash-clearing holes or material-poking holes, which, according to a concrete production circumstance, can periodically help clear off the surface crusting or treat accumulated materials. It is verified from long-time production experience that some otiose holes may also be sealed dead to reduce air leaks in the system. Besides, the system has also reserved some installation holes for air cannons. You can adjust the installation position of an air cannon according to a concrete circumstance of surface crusting or blockage in actual production.
2.3 窑头热风引至分解炉与熟料煅烧(烧成窑中) Leading hot air at the kiln outlet into the Precalciner and clinker calcinating (Middle of the Calcinating Kiln)
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
有电动闸板阀(437TV1,TV2/438TV1,TV2),通过调节窑尾的 ID 风机的转速和电动闸板阀的开度来控制三次风的用量。
For one of the two tertiary air ducts (437 TD1, TD2/438 TD1, TD2)with an outside diameter of Φ 3000 mm, one end is connected with the tuyeres of the front-end two sides of a grate cooler, and the other end, with the precalciner. Its function is to guide the high temperature gas recovered by the cooler lead into the precalciner. A tertiary air duct has electric dampers (437 TV1, TV2/438 TV1, TV2), which control the amount of tertiary air by adjusting the revolving speed of kiln inlet ID wind machine and the span of an electric dampers.
A tertiary air duct’s electric dampers are also equipped with cooling fan (437 FNM, FNN/438 FNM, FNN), used for cooling the paddle to lengthen its useful life.
The decomposed hot material powder separated from a C6 cyclone follows a discharging slope to be fed into the rotary kilns(437 KL1/438 KL1), and relying on the rotation of a rotary kiln, slowly move toward the kiln outlet. During the period of the movement, the powder is going on with exchanging heat with the hot fumes inside the kiln, realizing the serial chemical reactions in the kiln, and finally, at a burning zone, the combustion heat provided by the kiln outlet burners makes the powder sintered into cement clinker.
For the Φ6.2×92m rotary kiln, the gradient is 4%, with three supports, the kiln inlet has a cylinder compression type sealing apparatus and two air compressors(437 CP1, CP2/438 CP1, CP2), one in use and one on standby, multipoint grease pumps (437 LQ1/438 LQ1) are also provided, used for the lubrication of a sealing apparatus. The kiln outlet has steel sheets sealing apparatuses and cooling fans (437 FN1/438 FN1).The kiln is equipped with twin drive. For the main motors (437 MM1, MM2/438 MM1, MM2), power: 1050 kW, with frequency control. Speed adjustable range: 0.4~3.98~5 r/min. In addition to the main motors, there are also auxiliary motors (437 AM1,
7 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
AM2/438 AM1, AM2) and diesel generators (437 DE1, DE2/438 DE1, DE2), to be used under a special circumstance. The kiln is also equipped with double hydraulic thrust roller systems, respectively established in the third and second supports of the kiln. The hydraulic thrust rollers share a set of thrust roller oil pump stations (437 HD1/438 HD1). Under a normal circumstance, the kiln inlet shelves (437 KT1/438 KT1) are used. If the shelves malfunction, the kiln middle shelves (437 KT2/438 KT2) may be used instead. The hydraulic thrust roller system is used for restricting and adjusting the upward or downward movement of the kiln. Each supporting roller or axle bush is lubricated by oil and cooled by water, with temperature monitoring. A pinion has fog lubrication systems(437 LQ4/438 LQ4) to satisfy the lubrication of a drive flank. The body of a kiln is equipped with a kiln body surface scanning temperature monitoring system, which can at any time monitor the temperature change of the firing zone and its front and rear cylinder surfaces in the process of calcination. The burning zone and its back have 16 cylinder body cooling axial fan (437 FN 6~ L/438FN 6~ L), used for cooling a cylinder body surface. The serial axial fan have tracks, whose positions can be adjusted according to demands. The two sides of No. 1 or No.2 tyre have 4 cooling fans ( 437 FN 2~5/437 FN 2~5), used for cooling the liner plate and clearance of a tyre.
The main fuels that calcination needs inside a kiln are crude oil and natural gas. Crude oil is sent from the duplex high-pressure pumps ( L37 FP2/L38 FP2) provided particularly for the kiln outlet to the kiln outlet crude oil control valve train (447 VT1/448 VT1). Adjusting the flow rate valve of the valve train to control the amount of oil injection of a burner plus the accommodation of primary air to the burner can make the flame inside a kiln satisfy the requirements for clinker calcination. Burning gas is controlled by the natural gas valve train (447 VT2/448 VT2). The kiln outlet burners (447 BU1/448 BU1) as well as precalciner burners were provided by Pillard. The kiln outlet burner is a multichannel oil-burning and gas-burning combustion train, containing three air channels for axial wind(outer ring), spiral-flow wind (second outer ring) and center wind(fourth ring)respectively, one gas-burning channel(third ring), one oil-burning channel(inner ring oil gun) and one ignition channel(inner ring).The fuel a burner ejects, the cold air from the primary air fans and the secondary air from the coolers enter the kiln together for sufficient mixture and calcination, providing heat needed for the calcination of clinker. Together with a primary fan are a standby fan(447 FNH/448 FNH) and an emergency fan(447 FNI/448 FNI).The emergency fan is used for
8 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
timely blowing and cooling when the primary fan and standby fan stop so that the burner is protected from damage. The burner is suspended on the support of an electric moving cart. The cart is shored by a suspended track beam. In a certain range, the burner can be adjusted up and down, left and right, and move to and fro to satisfy the calcination requirements.
After leaving the kiln, the sintered high-temperature clinker falls onto the grate bed of a pendulum grate cooler. The grate cooler (447 GQ1/448 GQ1) is provided by the IKN company, with a capacity: 11000 t/d, grate bed effective area: 250m2. The cooler is divided into two sections, front and rear, for cooling. Each of the two grate bed sections is divided into two areas of a fixed grate bed and a movable grate bed. The fixed grate bed area uses the beam-providing-wind form, while the movable grate bed area involves the chamber-providing-wind form. The two front and rear movable grate bed sections use hydraulic drive, belonging to the two drive units(447 MD1, MD2/448 MD1s, MD2) of the hydraulic oil pump station(447 HD1/448 HD1).The speed of a grate bed can be adjusted according to the pressure under the grate so as to retain a certain clinker layer thickness. Each under-grate wind chamber is equipped with a single fan. Each chamber is airtight, with its air volume and air pressure adjustable alone, thus ensuring that cold air can overcome a corresponding section’s grate plate and material layer resistance and evenly penetrate a material layer, making the clinker on the grate bed receive effective cooling. A cooler is divided into two sections, front and rear, and between them, there is a roll crusher (447 CR1/448 CR1).The temperature of the kiln-leaving clinker is 1,400 ℃. The clinker is cooled by the front
9 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
section and crushed by a roll crusher so that the fineness of more than 95% of the clinker is less than 25 mm. The type of the crusher:6 × 4.8 m, roller diameter Φ 490 mm, roller length:4800 mm, loader:6 × 18 kW, roller speed:3~5 r/ min, working temperature of the roller: about 150~ 200 ℃. After the crushed clinker is cooled by the rear grate bed, the temperature for the clinker to leave the cooler can decline to an ambient temperature below +65 ℃. Through the unloading mouth at the end of the cooler, the clinker is unloaded to the clinker chain bucket conveyor (457 DP1/458 DP1), which sends the clinker to a clinker storage. The end of the front fixed bed is equipped with 9 air cannons (447 BQ 1~9/448 BQ 1~9), whose duty-cycle operation helps push the movement of clinker here. While clinker is passing a grate plate in reciprocating push, the small particles occasionally passing grate holes and falling into a wind chamber are collected in an ash bucket. The fine clinker particles in the front grate bed ash bucket are sent to a clinker chain bucket by pendulum (briefly called PHD system) (447 PC1s/448 PC1s). The fine clinker particles in the rear-section grate bed ash bucket are sent directly to the chain conveyors by ash bucket air-lock valves (447FV1~FV6/448FV1~FV6) under the control of material level and time controllers. The gas after the heat exchange of the material layers at the front grate fixed bed and in front of the movable bed may directly enter a kiln as secondary air and may be discharged to the conic section of the kiln inlet precalciner to enter the furnace. The rear exhaust (about 250-300 ℃) is purified by the kiln outlet electrostatic precipitator (EP) (447 EP1/448 EP1) (447 FNF/448 FNF) and guided to the chimney(447 SK1/448 SK1) and into the atmosphere by the kiln outlet fan (447FNF/448FNF). Air flow of an EP: 1,100,000 m 3/h, Cross area: 361 m2, dust concentration after gas purification: ≤ 20 mg/Nm3, voltage of high-voltage silicon rectifier: 66 kV, rated power: 66 kW. The dust caught by the clinker EP is sent to the general clinker chain conveyor (447CV5/448CV5) by 4 clinker chain conveyor (447CV1~4/448CV1~4) and rotary valve feeders (447RF1~4/448RF1~4) respectively and then sent to the clinker chain bucket conveyor. The air flow of the kiln outlet vent air fan: 1,150,000 m3/h, air pressure: 2,000 Pa, installed power: 1050 kW, with adjustable frequency control air volume.
After being conveyed by bucket conveyer (457DP1/458DP1) and divided by the diversion chute, the clinker will go into the clinker bulk silo after being controlled by the switch valve (457SG1/458SG1) and conveyed by the clinker bucket conveyer (457DP2/458DP2), and the clinker storage silo after being controlled by the switch valve (457SG2/458SG2) respectively. A central silo has been set up in the clinker storage silo for storage of unqualified clinker. People could send the clinker to the central unqualified clinker silo by selecting the electric switch valve (457SG4/ 458SG4) or the qualified clinker silo by selecting the electric switch valve (457SG3/458SG).
2.6 旁路放风及回灰输送
10 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
Due to over-standard chlorine content of the raw material used by this plant, the precalcining system will be crusted and blocked. Therefore, the bypass air outlet is set up on the uptake at the kiln inlet in order to carry out the bypass and decrease the circulation and concentration of harmful gases.
When the bypass system is started, the hot gas of the kiln inlet will be drawn out through the bypass air outlet, and then become the waste gas of about 200 ℃ after being mixed with the cool air from the primary cooling fan (417FN2/418FN2) and the cool air for the secondary cooling fan (417FN3/418FN3); and then, the waste gas will be purified by the system bag filter (427BF1/428BF1) and exhausted to atmosphere by the exhaust fan (427FN1/428FN1) of the bypass system through the chimney (427SK1/ 428SK1).Regulation of the air volume of the bypass system could be realized through adjustment of the rotation speed of the exhaust fan and opening degree of the adjusting valve (417DA3/418DA3). When the air volume of the bypass system is small, the cold-air valve (417DA 6/418DA6) could be opened to work instead of the secondary cooling fan. When the system failure occurs, the cold-air valve will also be opened first as temporary protection. The air volume of the primary cooling fan:300,000m3/h, wind pressure: 2100Pa, power efficiency:280 kW; the air volume of the secondary cooling fan: 300,000m3/h, wind pressure: 1800 Pa, power efficiency: 250 kW, frequency control. The primary cooling fan is not adjustable. Under normal circumstances, the primary cooling fan will be operated with full load, and the air supply volume of the secondary cooling fan could be adjusted according to the inlet temperature of the bag filter. Air volume the bag filter: 900000m3 /h, outlet dust concentration:≤20 mg /Nm3, gas temperature:180℃~ 220℃normally, resistance of the bag filter:≤1700Pa.Air flow of the exhaust fan of the system: 920000 m3 / h, wind pressure: 3800 Pa, power efficiency: 1450 kW, frequency control.
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
After being conveyed by the drag chain conveyor (427CV1,CV2/428CV1,CV2), revolving plow rotary feeder (427RF1,RF2/428RF1, RF2), transfer drag chain conveyor (427CV3,CV4/428CV3,CV4) and the elevator (427BE 1/428BE1), the dust collected by the bag filer will be fed into the bulk bin (427BI1/428BI1).The dust could not be returned to the burning system due to rich contents of noxious constituents such as chlorine and alkaline, so it will be discharged to the bulk tanker for transportation to other places through the bulk loading machine (427 BS1/428BS1) after being controlled by the screw gate valve (427SG1/428SG1) under the bin and conveyed by the rotary feeder (427RF4/428RF4).
3.烧成系统主要设备单元的操作规程
3. Operation Instructions of Major Equipment Units of the Burning system
This section only introduces the operation and maintenance of major equipment units of the burning system. For detailed equipment performance, configuration situation and operation requirements please refer to the process equipments table and equipment instruction manuals. If unconformity between the manuals provided by us and those provided by the manufacturers occurs, the manufacturers' manual should be taken as final.
3.2 范围
3.2 Scope
本规程适应于烧成系统主要设备单元的操作、维护,即从生料充气卸料到熟料入库之间的设备。
This regulation is applicable to the operation and maintenance of major equipment units of the burning system , that is, the equipments used from raw meal aeration and discharging to clinker warehousing.
Objective of this regulation is to standardize the operation and patrol system, improve working quality and provide accurate information on operation and maintenance matters of major equipment units that require attention, in order to help operating personnel determine equipment failures correctly and take correct and effective treatment measures, establish the concept of " safe production and quality first” and guarantee the long-term, safe and efficient operation of equipments.
3.4 操作摸式
12 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
All of the equipments have two control modes, namely, the "centralized program control" and "local control". There are "Start", "Stop" and "Lock" switches at the field. During regular production, all of the equipments are in the mode of "centralized control"; during single unit test run at the field, the equipment is in the mode of "local control". When a single unit is started, the equipments will not participate in the interconnected control; when a single unit is stopped, the equipments will be controlled by the interconnected control in order to guarantee the safe operation of equipments and prevent equipment failures due to material deposits in the equipments, thus realizing the objective of safe and reliable production.
3.5 主要设备单元的操作规程 Operating Instructions of Main Equipment Units
3.5.1 回转窑 Rotary kiln
3.5.1.1设备概述 Equipment Summary
回转窑是烧成系统的主要热工设备之一,主要由窑筒体、传动装置、支承装置、挡轮装置、窑头密封装置、窑尾密封装置、窑头罩等部分组成。The rotary kiln is one piece of the main thermal technical equipment of a burning system , consisting mainly of a kiln cylinder, drive unit, supporting apparatus, thrust roller device, kiln outlet sealing apparatus, kiln inlet sealing apparatus, kiln hood, etc.
3.5.1.2主要技术性能 Main Technical Performances
规格 Specification(m): Φ6.2×92m
有效内径 Effective inside diameter(m):
Φ5.7
斜度 Gradient(%): 4(正弦)(sine)
支座数(档)Number of support abutments:
3
产量 Output(t/d): 10000
窑转速 Kiln revolving speed(r/min):
用主传动时调速范围 Speed adjustable range at main drive:0.4~3.98~5
The kiln shell is the trunk of the rotary kiln and has been slantwise installed on three pairs of supporting rollers. The lower end of the cylinder is equipped with thermostable and abrasion-proof kiln outlet guard boards, constituting a casing space, and with exclusive-use fans to cool the kiln outlet. Along the length of the kiln cylinder, there are three tyres, under which there are floating liner plates. They may be adjusted or replaced according to the clearance after operation to acquire the best clearance. The liner plates have the functions to increase kiln cylinder rigidity, prevent the kiln cylinder from abrasion because of the relative slip of the tyres and the kiln cylinder in the circumferential direction and lower the surface temperature range inside and outside a tyre.
The kiln cylinder inside has 3 brick-blocking circles, and along the length direction and according to different temperatures and functions, there are firebricks with different performances to protect the shell. For the sake of helping the cylinder surface cool, the burning zone and its rear are equipped with 14 cooling fans, whose positions may be properly adjusted as required. For the sake of monitoring the cylinder surface temperature, an on-line shell temperature scanner has been set. It can always monitor the temperature change of the cylinder and display curves and pictures in the central control room.
The drive system uses twin drive. Each side has a main drive motor to drive a main reducer and a pinion, arousing the rotation of the kiln cylinder by jointly using a gearwheel. Each main reducer has one main reducer thin oil station. For the purpose of ensuring that the main power supply can still control the working of the kiln at power failure, preventing the kiln cylinder from being bent and facilitating an overhaul, an ancillary drive unit has been installed.
14 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
The power supply for the main drive motor and auxiliary drive motor is equipped with an interlocking device. When the power supply for the auxiliary drive motor is switched on, the power supply for the main drive motor will be automatically switched off and vice versa. The local drive in the kiln and the central control room are furnished with communication signals.
For the safe and reliable implementation of the switchover of a main drive motor and auxiliary drive motor, the system is equipped with an electromagnetic brake. The power supply of the electromagnetic brake is switched on or off simultaneously with the auxiliary motor, that is, the moment the auxiliary motor is powered on, the brake will be powered on and unclenched, while the moment the auxiliary motor is powered off, the brake is powered off, arresting motion instantly.
For the safe and reliable implementation of the switchover of a main reducer and an auxiliary reducer, the latter is equipped with an overrunning clutch. Its action lies in that while using auxiliary drive, the clutch is engaged. The dynamic force that auxiliary drive passes an auxiliary reducer and spreads to a main reducer, further arousing the rotation of a kiln. While using main drive, the clutch is disengaged and the dynamic force of the main drive can not spread to an auxiliary reducer.
15 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
The high-speed shaft end of a main reducer has 3 Pt100 bearing temperature measuring sensors and one Pt100 oil temperature measuring sensor as well as 2 vibration measuring sensors. Temperature or vibration exceeding a limit will send out an alarm. A main reducer’s thin oil station has a water cooling system.
As twin drive is adopted, it is also necessary to consider the synchronization requirements. There is automatic tracking in the drive system’s control.
Concerning the lubrication of the drive gears, a fog lubrication system has been provided on the tooth face of a pinion. Oil is provided intermittently and the setting of the interval time may be adjusted pursuant to an actual employment circumstance. When a spray nozzle is jammed, a sensor on the oil route distributor will send out an alarm signal. The central control room will display an alarm signal.
The supporting unit bears the complete weight of the kiln cylinder, and have the positioning action to the kiln cylinder, making it operate safely and steadfastly. The supporting unit is of core-adjusting sliding bearing structure. The bearing bush and oil are equipped with a temperature measuring alarm. Each bearing has a gear pump, providing lubrication at the early stage of kiln starting. The bearings of a supporting roller have a water cooling system.
Hydraulic thrust rollers are installed at the downside of tyres of bearing sets at the middle part and charging side of the rotary kiln. The hydraulic thrust roller forces the tyre and the kiln shell to reciprocate on the supporting roller in the direction of kiln center line at the certain speed and distance together, in order to make the tyre and the supporting roller worn evenly at the full width, so as to increase their service lives. Under normal circumstances, the main control thrust roller at the charging side of the kiln will be used. When the failure of this thrust roller occurs, the standby thrust roller at the middle of the kiln could be set as the main control thrust roller.
双挡轮共用一套挡轮油泵站。每个液压挡轮配置有油温报警装置。每个液压挡轮配置 5 只行程
16 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
This pair of thrust rollers shares a set of oil pump station of thrust roller. Each of the hydraulic thrust rollers is equipped with the oil temperature alarm unit. Each hydraulic thrust roller is equipped with 5 travel switches, so, this pair of thrust rollers are equipped with 10 travel switches. During running of the kiln, only one set of the travel switches could work, that is, during regular production, the thrust roller at the charging side of the kiln is used as the main control thrust roller, and the 5 travel switches on which are switched in to control actions of oil pump station of the thrust roller, while all of travel switches at the middle of the kiln are switched off; Under abnormal situations, when the hydraulic thrust roller at the middle of the kiln is used as the main control thrust roller, then the travel switches on it will be switched in while all of the travel switches at the charging end of the kiln will be switched off.
Actions of the 5 travel switches stand for 5 parts of the kiln respectively. Signals of the 5 travel switches control actions of oil pump and electromagnetic directional valve of the oil pump station of the thrust roller respectively, in order to adjust the kiln body to go up or down, and then circulate in this way. If the kiln and goes up or down deviating from normal condition, the signal of the travel switch will direct to issue alarm signals, and if the kiln continues to goes up deviating from the normal condition, the signal of the travel switch will lead to trip of the primary motor.
The oil pump station of thrust roller is also equipped with magnetic-induction type electro connecting pressure gauge for monitoring of the pressure of the hydraulic system. When the system pressure exceeds the setting value (the value of the pressure could be set up at the field) of its upper limit or lower limit, the alarm signals will be issued respectively to notify the patrol personnel to find out the reason, clear the fault and restore the system to normal operations.
The resistance temperature sensor is installed in the oil tank of oil pump station of the thrust roller, in order to measure the temperature of the liquid oil and monitor it in the central control room. When the oil temperature is over 55℃, the alarm signal will be issued to notify the worker to open the cooling water ball valve of the oil cooler. When the oil temperature is lower than 35 ℃, the alarm signal will be issued to notify the work to close the cooling water ball valve of the oil cooler.
挡轮油泵站内设有过滤器,当系统发生堵塞,其压差发讯器会发出报警信号,应通知工人清洗
17 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
或更换滤芯。
The filter is equipped in the oil pump station of thrust roller. When blocking occurs in this system, the pressure difference signal sender will issue alarm signals. The worker should be notified to wash and replace the filter element.
The sealing device of the kiln outlet adopts the GP (sheet steel) radial contact sealing method, which could automatically compensate the deflection and axial reciprocating motion of the kiln shell during running, and has favorable sealing property. The wind cooling cover is used at the combining part of the kiln outlet and the kiln hood, and the cooling fan is installed there. In order to prevent accumulation of fine particles of clinkers in the hood casing, the ash hopper is installed at the bottom. The ash hopper is directly connected with the grate cooler through the material-guiding chute. The fine particles of clinker will be sent onto the grate bed of the grate cooler directly. Two air cannons have been equipped to help transport the materials.
The sealing device of the kiln inlet adopts QD type of air cylinder pressing end-surface contact type. The entire sealing ring is under even stress, and it could eliminate the adverse effect generated by installation and deflection of the kiln shell. Two air compressors have been equipped for sealing of the kiln inlet, one for use and one standby, to provide power for the cylinder. Moreover, an electric multipoint consistent grease pump has been equipped. It could feed the lubricating grease into the contact surface of the friction ring for lubrication in order to reduce the frictional resistance and decrease abrasion. The grease pump is set as interrupted oil supply at fixed time, and the pause time is adjustable.
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
压力。另外窑门上还开有窑燃烧器的进出孔。
The kiln hood is hood-shape equipment connecting the kiln and the cooling machine tightly. The legs on the two sides of the kiln hood are located on the operating platform of the kiln outlet. The firebricks or castables are laid or poured in the kiln hood. A pair hanging and movable kiln Door is installed at the outer end surface of the kiln hood, so that workers could enter into the kiln to do works such as overhaul and laying of the kiln lining and so on. The sight window and TV probe have been set on the kiln door. People could observe the calcinating situation in the kiln by using the tools at the field or remotely; the temperature probe is also installed on the kiln door for monitoring of the temperature of the calcinating zone. Measuring points of temperature and pressure are set on the side of the kiln hood, in order to monitor the temperature and pressure of the gas at the kiln outlet. In addition, the entry & exit hole of kiln burner is opened on the kiln door.
3.5.1.4 开机前的准备 Preparations before Startup
1)窑体 Kiln body
a、确认窑出入口处密封护板及窑口护铁的安装螺栓是否松动;
a, Confirm whether an erection bolt of a kiln access sealing guard board or a kiln outlet cover iron is loose or not;
b、确认轮带与垫板间是否加足石墨锂基脂。
b, Confirm whether sufficient graphite lithium based grease has been added to the space between a tyre and a liner plate.
c、确认轮带与托轮接触面之间有无异物。
C, Confirm whether there is foreign matter on the interface between a tyre and a supporting roller.
d、确认轮带与托轮在旋转时是否碰到其它物体。
d, Confirm whether a tyre and supporting roller run into other bodies while revolving.
e、确认窑内耐火砖完好,耐火砖厚度可满足开机要求。
e, Make sure that the firebricks inside the kiln are intact and their thickness can satisfy the startup requirements.
2)托轮 Supporting roller
a、确认各部位螺栓有无松动。
a, Confirm whether each part’s bolts are loose or not.
b、托轮轴温检测装置是否完好。
b, Confirm whether a shaft temperature detection apparatus is intact or not.
c、确认润滑油位,冷却水阀是否打开。
c, Confirm whether a lub oil level valve or a cooling water valve is unbolted or not.
19 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
3)传动装置 Drive unit
a、检查大齿轮与小齿轮的啮合、磨损与润滑情况。
a, Check the engagement, abrasion and lubrication circumstances of a gearwheel or a pinion.
b、小齿轮轴承润滑油路是否畅通,齿面喷油装置是否正常。
b. Check whether the lub oil route of the pinion bearings is unimpeded or not and the tooth face oil injection apparatus is normal or not.
c、检查油箱油量;
c, Check the oil amount of an oil tank;
d、确认各部位螺栓有无松动。
d, Confirm whether each part’s bolts are loose or not.
e、稀油站冷却水是否畅通。
e. Check whether the thin oil station’s cooling water is unimpeded or not.
f、各测量元件是否完好,报警系统是否正常。
f Check whether each measuring element is intact and each alarm system is normal.
g、检查主、辅离合器是否能正常离合,是否在正确的位置,限位开关是否能动作准确。
g. Check whether a main or auxiliary clutch can work normally and is in an exact position, and whether a limit switch can act accurately.
h、检查各阀门、管道是否正常,有无渗、漏油。
h Check whether each valve or pipeline is normal and leaks oil.
4)液压挡轮 Hydraulic thrust roller
a、检查液压挡轮轴承和油箱油质,油量是否满足要求;
a, Check a hydraulic thrust roller bearing, oil tank and oil quantity and whether the oil quantity can satisfy the requirements;
b、泵吸入侧阀是否全部打开,送油管路内气体是否全部排出;
b Check whether all the pump suction side valves are unbolted and whether the gas inside the oil delivery pipe route is all discharged;
c、确认各过滤器的指标是否处于正常位置;
c, Confirm whether the indexes of each filter are placed in normal positions or not;
d、检查泵安全阀设定压力是否在规定值;
d, Check whether the set pressure of a pump safety valve is a rated value;
e、检查各手动阀门是否动作灵活,是否有泄漏或损坏现象,如有应立即更换。
20 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
e, Check whether the motion of each hand operated valve is flexible and whether there is a leakage or damage phenomenon. If there is, replace the valve immediately.
f、检查液压挡轮的石墨润滑情况,保持石墨块与挡轮接触面接触良好。
f, Check the black lead lubrication circumstance of a hydraulic thrust roller, and maintain the good interface of a black lead cake and a thrust roller.
g、检查电接点压力表有无损坏及异常现象,指针是否放在设定的控制点上。
g, Check whether a pressure gauge with electric contact has a damage and abnormal phenomena and whether a needle pointer is put on the stated control point.
h、检查各测量元件是否完好,报警系统是否正常。
h, Check whether each measuring element is intact and an alarm system is normal.
5)窑头罩 Kiln hood
a、确认耐火材料是否符合砌筑要求,燃烧器入窑孔周围密封是否添加。
a, Confirm whether a refractory material meets laying requirements and the sealing of a burner going into the kiln is affixed.
b、窑头罩是否与旋转部件摩擦。
b Check whether the kiln hood rubs with a revolving part.
3.5.1.5开停机顺序及注意事项 Startup and Shutdown Sequence and Matters Need Attention
1)开停机顺序遵循的原则 Principles to be followed for startup and closedown sequences
开机时遵循的原则是:a)开保护系统的设备,如冷却水、润滑系统等;b)启动尾部设备;c)启动主体传动设备;d)筒体冷却设备。而关机时遵循的原则是:a)停主体传动设备;b)停尾部设备;c)停润滑设备;d)停筒体冷却设备;e)停保护系统的设备如冷却水系统。1) Principles to be followed for startup and closedown sequences
Principles to be followed for startup are: a) turning on the equipment of a protecting system, such as cooling water, lubricating system, etc.; b)starting tail equipment; c) starting master drive equipment; d)cylinder cooling equipment Principles to be followed for closedown are: a)stopping the master drive equipment; b)stopping tail equipment; c)stopping the lubrication equipment; d)stopping the cylinder cooling equipment; e)stopping the equipment of a protecting system, such as a cooling water system.
The sequences for startup and closedown have already been set up in the centralized control system, and there are startup sequence control and interlocking relations. The simple introduction here is for understanding their relations more adequately.
A)开机顺序 Sequence for startup
21 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
Water cooling system of a supporting roller → retardance machine thin oil station water cooling system → starting multipoint grease pump(437 LQ1/438 LQ1) →starting kiln inlet air compressor(437 CP1/438 CP1) →starting 12 gear pumps(437 LQ5/438 LQ5)whose oil is provided by shoring apparatus axle bush and starting shoring apparatus temperature monitoring system →unbolting 5 travel switches(5 travel switches of the kiln middle must be in closed status) at the kiln inlet →starting the pinion fog lubrication system(437 LQ4/438 LQ4) →starting retardance machine thin oil station(437 LQ2, LQ3/438 LQ2, LQ3), removing the kiln moment of force →starting retardance machine temperature, pressure and vibration monitoring system →confirming the disengagement of main and auxiliary drive overrunning clutches →at the time of starting kiln main motors(437 MM1, MM2/438 MM1, MM2), starting thrust roller oil pump station(437 HD1/438 HD1) →initiating twin drive synchronic monitoring system →kiln outlet cooling fan(437 FN1/438 FN1) →tyre cooling fans(437 FN 2~5/438 FN 2~5) →cylinder cooling fans(437 FN 6~ L/438 FN 6~ L)
At the time of stopping kiln main motors(437 MM1, MM2/438 MM1, MM2), stopping thrust roller oil pump station(437 HD1/438 HD1) →main and auxiliary drive overrunning clutch engagement → starting auxiliary motor →entering slow running control procedure →stopping thin oil station of retardance machine →stopping cooling fan according to temperature requirements →stopping kiln inlet air compressor →kiln slow running ending, the temperature of bearings and axle bushes of the equipment satisfying requirements, stopping water cooling system.
3)注意事项 Points for attention
a、禁止窑主电机启动时,窑力矩未消,损伤动力机构;
a, Prohibit the kiln moment of force not being eliminated to avoid damaging the actuating unit when the main kiln motor starts;
b、窑主电机启动时,窑速应设在最低值;
b, When the main kiln motor starts, the kiln speed shall be set at the lowest value;
c、停窑检修时应尽量送空窑内的物料。
c, If the kiln is stopped for an overhaul, empty the kiln of materials as far as possible.
22 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
d、不要在无油状态下启动油泵和传动装置。
d. Do not start an oil pump and drive unit without oil.
e、确认好离合器的位置。
e, Confirm the position of a clutch.
f、窑停机时不能开液压挡轮油泵;
f, Do not turn on a hydraulic thrust roller oil pump when the kiln is shut down;
g、托轮的油温、瓦温超过 70℃时,应检查原因并采取降温措施。
g, When the oil and bush temperatures of a supporting roller are more than 70 ℃, find out the cause and take measures for temperature reduction.
3.5.1.6 运转过程中的检查 Inspection During Operation
1)传动装置的检查 Drive unit inspection
A.电动机: Motor:
a、电动机的运行情况,电流是否在规定值内,如突然增大应查明原因,及时处理;
a, Check the running circumstance of an motor and whether the current is a rated value. If it is enlarged suddenly, find out the cause and handle it in time;
b、 检查有无异常振动、不正常响声及异常气味;
b, Check whether there are abnormal vibration, noise and odor;
c、 检查地脚螺栓有否松动现象。
c, Check whether the foundation bolts are loose.
B.减速器 Reducer
a、 检查运转是否平稳,齿轮啮合声音是否正常;
a, Check whether the operation is steady and the gears engagement sound is normal;
b、 检查有无异常振动及漏油现象;
b, Check whether there are abnormal vibration and oil leakage;
c、 检查稀油站冷却效果是否良好;
c, Check whether the thin oil station cooling effect is good or not;
d、 停窑时,根据需要可以打开齿轮罩上观察门盖,检查轮齿有无点蚀、磨粒磨损等不良现象。
d, While the kiln is not in use, as required, it is allowable to unbolt the observation door cover of a gear hood to check whether a gear tooth has such bad phenomena as pitting corrosion, abrasive particle abrasion, etc.
23 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
e、 检查减速器油泵站工作参数是否正常,检查冷却水流量是否正常。
e, Check whether the working parameters of a reducer oil pump station are normal and the flow rate of cooling water is normal.
C.联轴器 Coupling
a、 检查联接螺栓有无松动,组合联轴器的夹层板是否有不允许的变形;
a, Check whether the adjoining bolts are loose and the sandwich panel of a combination coupling has unallowable deformation;
b、 检查有无摆动现象。
b, Check whether there is a swinging phenomenon.
D.传动大、小齿轮及轴承 Driving Gearwheel, Pinion and Bearing
a、 检查齿轮传动装置运转是否平稳,有无敲击声;
a, Check whether the operation of a gear drive apparatus is steady and has knock sound;
b、 检查大、小齿轮齿面接触斑点,沿齿高不少于40%,沿齿长不少于50% ;
b, Check the contact patterns on a gearwheel or pinion tooth surface and make sure that they shall not be less than 40% in tooth depth and not less than 50% in tooth length;
c、 大齿轮的径向、轴向摆动情况;
c, Check the radial and axial swing circumstances of a gearwheel;
d、 检查喷雾润滑效果是否良好,齿面油量是否充足,油的粘度是否合适,有无不正常冒烟现象;
d, Check whether the effect of fog lubrication is good or not, a tooth face oil quantity is ample or not, the oil viscosity is appropriate and there is an abnormal phenomenon of smoke emission;
e、 检查传动轴承温升是否正常,密封装置是否有效,有否漏油和不正常现象;
e, Check whether the drive bearing temperature rise is normal and the sealing apparatus is effective, and whether there are oil leakage and other abnormal phenomena;
f、 传动装置地脚螺栓及其它联接螺栓有无松动,是否产生振动或摆动。
f, Check whether the drive unit foundation bolts and other adjoining bolts are loose and whether there is vibration or swing.
2) 轮带及支承装置的检查 Inspection of tyre and supporting apparatus
a、 检查轮带与垫板之间的间隙是否正常,有无异常响声,挡块、挡环是否有效;
a, Check whether the clearance between a tyre and a liner plate is normal, whether there
24 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
is abnormal noise, and whether a baffle block or baffle ring is available;
b、 检查轮带与托轮的接触情况及其表面的磨损情况;
b, Check the contact circumstance and surface abrasion circumstance of a tyre and supporting roller;
c, Check the axial slinging of the kiln cylinder, and in time adjust the supporting rollers and control the upward and downward axial slinging of the kiln cylinder. The thrust direction of each pair of supporting rollers shall consistent. The general method for judging a thrust direction is to observe whether a thrust washer and a lining tile end contact or have a gap at joint. When the thrust is heading up, the gap at joint shall be kept at the lower end (the hot end) of a supporting roller spindle, and the upper end shall contact no gap. If the thrust washer of a supporting roller is inside the spindle, the gap shall be kept at the upper end (the cold end), and the lower end shall contact no gap. When the thrust is getting down, the orientation that the gap retains is contrary to the above-mentioned circumstance. Judging the value of a thrust may be based on the thickness of an oil film formed at the contact place between a thrust washer and a lining tile. The less and thinner an oil film is, the bigger the thrust is, and if conversely, the thrust is smaller.
The positive pressure borne by various supporting rollers shall be even. Generally, its identification method is based on the degree of luster of the interface between a tyre and a supporting roller. If the surface of contact becomes bright, the bearing force will be big, while if the surface of contact becomes dark, the bearing force will be small. Identification may also be based on observing the thickness of an oil film on the axle neck of a supporting roller. If the oil film is thin, the bearing force will be big, while if conversely, the bearing force will be small;
d、 检查球面瓦内冷却水是否畅通,管路有无漏水现象;
d, Check whether the cooling water inside the spherical tiles is unimpeded or not and whether the pipeline has water leakage;
e, Check whether the surface oil film on the axle of a supporting roller is even and clean and whether there is wire drawing and grooves. Observe whether the level of a
25 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
supporting roller bearing pack meets a requirement and whether there is oil leakage;
f、 检查托轮轴承温升是否正常;
f, Check whether the supporting roller bearing temperature rise is normal;
g、 检查挡轮转动是否灵活,有无因受力过大而引起挡轮表面发亮、起毛及轴承发热、响声等不正常现象;
g Check whether the rotation of a thrust roller is flexible and whether there are such abnormal phenomena as surface brightening and fuzzing caused by oversize force, and a bearing emitting heat, noise, etc;
h、 检查支承装置地脚螺栓有无松动或断裂现象;
h, Check whether the supporting apparatus foundation bolts are loose or ruptured;
i、 检查基础有无震动和局部沉陷。
i, Check whether the foundation has dither and local settlement.
3) 液压挡轮及挡轮油泵站Hydraulic thrust roller and thrust roller oil pump station
a、 泵的油量是否稳定,油压波动范围是否正常;
a, Check whether the oil quantity of a pump is stable and whether the oil pressure fluctuation range is normal;
b、 检查轮带与挡轮间的接触和磨损是否均匀,有无受力过大和出现表面损伤等情况;
b, Check whether the contact and abrasion between a tyre and thrust roller are even and whether there are oversize force, surface damage, etc;
c、 工作泵噪音及各部异音是否过大,气缸活塞行程是否达到规定值;
c, Check whether the noise of a working pump and each part is oversize and whether the cylinder piston stroke attains to a rated value or not;
d、 检查各点油温是否正常;
d, Check whether the oil temperatures at all points are normal;
e. 检查油箱油位,使之经常保持在规定的油量内,注意工作油的透明度,以及油的起泡情况;
e, Check the level of an oil tank, make it often kept at a specified oil quantity and note the transparency and effervescence circumstance of power oil;
f. 各限位开关的动作是否准确、灵敏;
f, Check whether the motion of each limit switch is accurate and sensitive;
g. 检查各部位是否有渗、漏油现象;
g, Check whether each part has oil leakage;
26 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
h. 使用水冷却时,检查冷却水流量是否正常
h, Check whether a cooling water flow rate is normal while using water for cooling.
a, Check the kiln shell surface temperature change in order to prevent an accident of bricks dropping into the kiln and to provide references for where and when to replace firebricks. What is specially reminded is that the kiln shell surface’s maximum temperature is not allowed to be more than 400 ℃ otherwise the remarkable reduction in the strength and rigidity of the kiln shell steel plates will result in a hazard of generating cracks;
b、 检查窑筒体对接焊缝有无裂缝;
b, Check whether the kiln shell butt joint soldering seams have cracks;
c、 检查窑筒体有无严重摆动现象,窑筒体窜动是否稳定;
c, Check whether the kiln cylinder has a severe swing phenomenon and whether the axial slinging of the kiln cylinder is stable;
5)密封装置的检查 Inspection of sealing apparatus
a、 检查密封装置的零部件,有无严重磨损或损坏,润滑部位是否完整有效,联接螺栓有无松动和脱落;
a lubricated part is integral and available and whether the adjoining bolts are loose and have come off;
b、 密封元件是否完整有效,密封摩擦部位是否接触良好,是否有严重漏风现象。
b, Check whether the sealing components are integral and available, whether the contact of a sealed friction part is good and whether there is severe air leakage.
3.5.1.7 日常运转中的维护及注意事项Maintenance in Routine Running and Matters Need Attention
a, A drive system, supporting unit or thrust roller system shall often(per hour) be inspected and such abnormal circumstances as noise, vibration, heat generation, etc shall be handled in time;
b、 所有的润滑点的润滑是否正常,应严格遵照润滑制度,经常检查油量是否充足;
b, Check whether the lubrication of all lubrication points is normal, strictly observe the lubrication system and often check whether the amount of oil is ample or not;
27 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
c、 托轮衬瓦每小时要检查一次轴承温度及其润滑情况;
c, For a supporting roller lining tile, check the bearing temperature and its lubrication circumstance per hour;
d、 根据轮带与其垫板之间在一转中的相对位移,来判明间隙及磨损情况;
d, According to the relative displacement of a tyre and its liner plate in one revolution, judge the clearance and abrasion circumstance;
e、 注意窑筒体有规律的上下窜动情况(每班上下窜动一次);
e, Note the regular axial slinging of the kiln cylinder(one upward and downward axial slinging per shift);
f. 注意各冷却水出口是否水流畅通,以及托轮下部水槽水面的高度,高度不适宜应利用水位调节器进行调整;
f, Note whether the flow of each cooling water outlet is unimpeded and note the level of the water trough under a supporting roller. It is not suitable to make use of a water level regulator for adjustment;
g. 经常注意窑筒体温度。窑筒体温度可通过红外线扫描装置的自动记录仪上来判明。窑筒体表面温度 最高不得超过400℃ ;
h, Often note that the kiln cylinder temperature. The kiln cylinder temperature may be judged from an automatic recording instrument of an infrared scanning device. The maximum kiln cylinder surface temperature shall not be more than 400 ℃;
h. 对检查中发现的问题,应根据问题性质适时地进行处理和记录;
i, For an issue discovered in inspection, carry out treatment and recording in good time according to its nature;
i. 维护工作应与窑的操作工紧密配合,加强联系。检查及处理中务必注意安全,有些项目的检查处理应在停窑后进行。
j, The maintenance work shall closely fit the operation work for the kiln, and coordination shall be intensified. Pay attention to safety in the inspection and treating. The some inspection and treating of some items shall be conducted after stopping the kiln.
3.5.1.8 基础不均匀沉降的检查 Inspection of Unequal Foundation Settlement
The rotary kiln is a piece of big and heavy equipment. The kiln cylinder is shored on many separate isolated foundations, so the foundation settlement is ineluctable. But if the settling
28 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
volume is oversize or each kiln foundation shows unequal settlement, it will directly influence the linearity of the kiln, making the kiln generate abnormal bend and deformation and endangering the safe operation of the kiln. At the same time, the kiln outlet and the kiln outlet hood and are connected with each other, and the kiln inlet is connected with the kiln inlet equipment, so the unequal settlement of the kiln and these pieces of equipment damages the connecting parts and directly influence the sealing effects of the kiln outlet and the kiln inlet. Therefore it is very necessary to inspect the settling volumes of the equipment foundations.
1)窑墩基础沉降的检查 Inspection of kiln pier foundation settlement
True height survey points have already been installed on each side of a kiln pier and at the time of equipment installation, and the true heights of these points were measured and recorded. These are the reference for measuring kiln pier settlement. From the beginning of the installation of the rotary kiln on, the changes of the true heights of these points shall be observed and measured:
a. 从设备安装到试运转的这段时间内,窑墩基础可能有最大15mm的垂直沉降,所以试运转前需对基础下沉量进行测量,并根据测量结果对支承装置托轮的位置进行调整,以使窑筒体中心线恢复到设计位置;
a, During the period from equipment installation to test running, a kiln pier foundation may have the perpendicular settlement of maximum 15 mm, so it is necessary to measure a foundation settling volume before test running and adjust the position of the supporting apparatus of a supporting roller according to the measurement results to make the kiln cylinder’s center line restored to the designed position;
b. 在回转窑运转初期的6 个月内,窑墩基础还可能有最大5mm的沉降,所以在这期间应经常对窑墩基础沉降进行测量;
b, Within the early 6 months of the operation of the rotary kiln, a kiln pier foundation may have the settlement of another maximum 5 mm, so in this period, it is necessary to often measure the kiln pier foundation settlement;
c. 在回转窑运转6个月以后,窑墩基础还可能有每年1mm的沉降,所以必要时亦对基础沉降进行测量。
c. After 6 months of the operation of the rotary kiln, the kiln pier foundation may have the settlement of another 1 mm each year, so when it's necessary, the foundation settlement shall also be measured.
2)基础沉降的分析与处理 Analysis and treatment of foundation settlement
The relative perpendicular settlement of each pier of the rotary kiln is allowable, but the slant settlement of the equipment foundation is not because slant settlement is very difficult to treat:
a、 当各窑墩的垂直沉降差超过3mm时,就应对相关支承装置的托轮位置进行调整,调整时应
29 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
注意两托轮中心与轮带中心夹角应满足60°±2°的要求;
a, When the perpendicular settlement difference of each kiln pier exceeds 3 mm, the supporting roller positions of the related supporting devices shall be adjusted. , During adjustment, note that the included angle between the center of two supporting rollers and the center of a tyre should satisfy the requirement of 60°± 2;
b, The settlement difference exceeding 25mm for a kiln outlet pier and a kiln inlet pier, and a cooler or kiln outlet hood, and a kiln inlet equipment foundation corresponding with them is disallowed. If the difference has been exceeded or has already generated impacts on sealing, it is necessary to treat relevant parts until attaining satisfaction.
3.5.1.9 停机后的维护保养和主要零件的磨损与更换 Maintenance and Upkeep after Closedown and Abrasion and Replacement of Main Parts
a、 确认轮带的内径与轮带下垫板外径之间的间隙达 20mm 时,应做相应的处理。
a. When the clearance between the bore of a tyre and the outside diameter of a liner plate under the tyre reaches 20 mm, corresponding treatment shall be given.
b. If the cross section of a tyre is found to be abraded by 10%(its stress and rigidity shall be examined and calculated at this time), or the surface has been ground into a taper or polygon and a local part has shown continuous cracks, replacement shall be needed;
c. When the thickness of a supporting roller has been abraded by 10%, the rim thickness of a thrust roller has been ground by 20%, or the surface of a supporting roller has been ground into a taper, polygon or other abnormal shape, or the rim of a supporting roller or thrust roller has continuous cracks, replacement or repair shall be needed. When a supporting roller is replaced, the shaft shall also be replaced and its corresponding lining tile shall be re-faced up;
d、 传动齿轮的齿厚磨损了 30%或 0.5 模数时;或轮缘具有不可恢复的损伤时需更换;
d. When the tooth thickness of a driving gear has been abraded by 30% or the modulus of 0.5 or a rim has non-recoverable damage, replacement shall be needed;
e、 窑筒体段节有裂纹或局部变形时,要进行修理或更换;
e. If a kiln shell segment has cracks or local deformation, repair or replace it;
f、 确认托轮润滑石墨块的消耗情况,必要时更换。
30 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
f. Determine the dissipation circumstance of a supporting roller lubrication black lead cake, and replace it when it's necessary.
g、 确认冷却水是否正常,润滑油是否更换和补充。
g. Determine the flow cooling water,lubrication is good and enough, and replace it when it's necessary.
h. Confirm the abrasion circumstance of a kiln outlet or kiln inlet sealing device, and replace it when it's necessary. If the thickness of a fixed friction ring or movable friction ring of a kiln inlet sealing apparatus has been abraded by 2/3, replacement shall be done.
i、 检查窑口护铁及窑衬厚度,必要时更换。
i. Check the thickness of the kiln cover iron and the kiln lining, replacement shall be done when it's necessary.
j、 检查窑、窑头罩等处的耐火材料,掉砖必须补,蚀薄大于 1/3 必须更换。
j. Check the refractory material of the kiln, the kiln outlet hood, etc. A dropped brick shall be supplemented. If the corrosion thickness is greater than 1/3, replacement shall be done.
3.5.1.10 常见故障分析及处理 Common Fault Analysis and Treatment
If a fault appears in a procedure in production, it shall be differentiated according to a different circumstance. For an important question, a user, manufacturer and designer shall investigate and analyze the cause, and discuss a treating way together. The causes and treatment processes of some common faults and their causes are briefly described as follows:
常见故障Common fault
产 生 原 因
Cause
处 理 方 法
Treatment process
窑衬及其镶砌质量不良或腐蚀后过簿没有按期更换、导致掉砖红窑。
The quality of the kiln lining and its laying are poor or the lining is ultra-thin after corrosion but no replacement is done on time, causing bricks to drop in the burning kiln.
选用质量高的耐火砖,停窑补换新砖,提高镶砌质量,严禁压补。
Select high-quality firebricks, replace with new bricks after stopping the kiln, raise the laying quality and strictly forbid pressed repair.
掉砖红窑
Bricks dropping in burning kiln
窑皮挂得不好
The hanging of kiln coating is not good.
加强配料工作,提高操作水平Intensify raw meal admixture work and raise the operating level.
31 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 产 生 原 因 处 理 方 法 Common fault Cause Treatment process
燃烧器欠佳
A burner is not good.
检查燃烧器 Check the burner.
轮带与垫板磨损严重,间隙过大,窑筒体径向变形增大。
A tyre and a liner plate are abraded severely, the clearance is oversize, and the kiln shell radial strain increases.
严格控制烧成带附近的轮带与垫板间隙,间隙增大时要及时更换垫板或加垫调整。
Strictly control the clearance between a tyre and a lining plate near the burning zone. If the clearance increases, replace the liner plate or add packing sheets for adjustment in time.
窑筒体中心线不直
The kiln cylinder center line is not straight.
定期校正窑筒体中心线
Periodically calibrate the kiln cylinder center line.
窑筒体局部过热变形,内壁凸凹不平。
The kiln shell is superheated to deformation, and the inside wall is rough.
红窑必停,对变形过大的窑筒体及时整修或更换。
The burning kiln must be stopped. The kiln cylinder with oversize deformation shall be trimmed or replaced in time.
窑筒体受热不匀,弯曲变形过大,托轮脱空。
The kiln cylinder vibrates The kiln cylinder is heated unevenly, the bending strain is oversize and a supporting roller has come off.
正确调整托轮
Accurately adjust the supporting roller.
大小齿轮啮合间隙过大或过小
The engagement clearance of a gearwheel and a pinion is oversize or undersize.
调整大小齿轮的啮合间隙
Adjust the engagement clearance of the gearwheel and the pinion.
大齿圈接口螺栓松动或断落
A girth gear interface bolt is loose or has been broken and dropped.
紧固或更换螺栓
Tighten or replace the bolt.
弹簧板焊缝开裂
A spring lamination soldering seam cracks.
重新找正、补焊
Give recalibration and repair welding.
传动小齿轮磨损严重,产生台阶
A drive pinion is abraded severely, generating steps.
更换小齿轮
Replace the pinion.
窑筒体振动
The kiln cylinder vibrates
基础地脚螺栓松动 紧固地脚螺栓
32 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 产 生 原 因 处 理 方 法 Common fault Cause Treatment process
A foundation bolt is loose. Tighten the foundation bolt.
窑筒体振动引起
The kiln cylinder vibrates.
见前述,对症处理
See the above description and handle it accordingly.
表面温度太高或红窑烧损窑筒体,强度和刚度削弱。
The surface temperature is too high or the red kiln burns down the kiln cylinder, and the strength and rigidity are weakened.
窑筒体复补,加固烧焊
Repair the kiln cylinder again and give reinforcing soldering.
某档托轮顶力过大
The propping force of some supporting roller is oversize.
正确调整托轮,减轻负荷。
Accurately adjust the supporting roller and reduce the load.
窑筒体开裂
The kiln shell cracks.
筒体钢板材质有缺陷或焊缝质量差
The cylinder steel plate material has flaws or the soldering seam quality is poor.
用金属探伤器检查内部缺陷
Use a metal defect detector to examine the internal defects.
突然停窑后,长时间没转窑。
After stopping the kiln suddenly, the kiln does not rotate for a long time.
将窑弯处做一记号,等窑转到上面时停窑数分钟,使其复原。
Mark a bending part of the kiln and stop the kiln for a few minutes when the kiln turns to the mark, making it restored.
窑筒体弯曲偏斜The kiln cylinder is bent and deflected.
窑墩基础下沉,托轮位置发生移动
A kiln pier foundation subsides, and the position of a supporting roller is moved.
根据测量数据,正确调整托轮位置Accurately adjust the position of a supporting roller according to the survey data.
窑中心线不直,衬瓦受力过大。
The kiln center line is not straight, and the force on the lining tile is oversize.
校正窑中心线,调整托轮受力。
Correct the kiln center line and adjust the force on the supporting roller.
托轮不正确歪斜,轴承推力过大。
The supporting roller is out of square and the bearing thrust is oversize.
调托轮位置。
Adjust the position of the supporting roller.
托轮衬瓦过热
A supporting roller lining tile is overheated.
轴承内冷却水管漏水,用油不当或润滑油变质,油内混有其它杂物。
The cooling water pipe inside a bearing leaks water, use of oil is not appropriate the lub oil deteriorates or the oil inside has other dopants.
及时换油,修理水管,清洗衬瓦。
Replace the oil, repair the water pipe and clean the lining tile.
33 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 产 生 原 因 处 理 方 法 Common fault Cause Treatment process
带油勺发生故障或油盘油沟堵塞。
An oil dipper fails, or an oil pan or oil groove is blocked.
清理油沟,及时修复带油勺。
Clean up the oil groove and restore the oil dipper.
衬瓦质量不良,有夹渣或其它杂物。
The lining tile quality is bad and it has scum or other dopants.
改换粘度大润滑油或更换衬瓦。
Replace with lub oil with great viscosity or replace the lining tile.
托轮衬瓦拉丝 A supporting roller lining tile is drawn into wires. 油内混有铁屑,熟料粒及其它硬度较大杂
物。
The oil is mixed with scrap iron, clinker particles and other dopants with higher hardness.
换油、清洗衬瓦。
Change the oil and clean the lining tile.
托轮径向受力过大,致使轴与衬瓦间摩擦力增加,油膜破坏。
The supporting roller radial force is oversize, causing the frictional force between the axis and the lining tile to increase and breaking the oil film.
调整托轮受力状况,更换轴承内润滑油,调大轴承冷却水量及采用其它冷却措施。
Adjust the stressed state of the supporting roller, replace the lub oil inside the bearing, enlarge the cooling water quantity of the bearing and adopt other cooling measures.
托轮轴向推力过大,使止推圈受力过大,产生强力摩擦。
The supporting roller axial thrust is oversize, making the stress of the thrust washer oversize, generating strong friction.
调整托轮,减轻推力,保持托轮推力均匀。
Adjust the supporting roller, reduce thrust and keep the thrust of the supporting roller even.
窑筒体局部高温辐射轴承,使润滑油粘度变底,油膜变薄。
The local high heat of the kiln cylinder radiates a bearing, making the lub oil viscosity drop and the oil film become thin.
临时换入粘度较高的润滑油,增加隔热措施。
Replace with lub oil with higher viscosity temporarily and increase heat insulation measures.
轴承内冷却水长时间中断,使其温度升高,破坏油粘度。
The cooling water inside the bearing has been discontinued for a long time, making its temperature rise and damaging oil viscosity.
恢复冷却水,保持畅通,更换新的润滑油。
Restore the cooling water, keep it unimpeded and replace with new lub oil.
托轮衬瓦发生叫声及产生振动
A supporting roller lining tile generates sound and vibration.
冬季低温时,轴承内润滑油粘度偏高,流动性差,呈缺油状态。
及时更换冬季润滑油,开加热器,对油加热。
34 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 产 生 原 因 处 理 方 法 Common fault Cause Treatment process
At low temperature in winter, the lub oil viscosity inside the bearing is on the high side, with poor liquidity and presenting an oil starvation status.
Replace winter lub oil in time, and turn on a heater to heat the oil.
慢速转窑时间过长,使油勺带油量过少,不能满足衬瓦的润滑要求。
The time of slow kiln rotation is too long, making the oil amount of the oil dipper undersize and not meeting the lubrication requirements of a lining tile.
开启加油泵或临时人工加油,提高窑速。
Turn on the oil pump or do temporary manual oiling to raise the speed of the kiln.
轴承内润滑装置发生故障。
The lubricating device inside the bearing breaks down.
及时修复、清理、补充新油。
Do restoration and straightening in time, and supplement new oil.
轴与衬瓦接触点不符要求。
The contact point of the axis and the lining tile does not meet the requirement.
重新修刮衬瓦。
Fix and pare the lining tile again.
托轮中心线歪斜过大,接触不匀,局部单位压力增大。
The inclination of the supporting roller center line is oversize, the contact is not
en, and partial unit pressure increases. ev
托轮
T
The surface o
调整托轮,减少歪斜度,增加与轮带接触面积。
Adjust the supporting roller, reduce skewness and increase contact area with the tyre.
径向力过大。
he supporting roller radial force is oversize.
调整托轮,减轻负荷。
Adjust the supporting roller and reduce the load.
窑体窜动性差,长期在某一位置运转,致使托轮产生台肩,一旦再窜动,破坏接触表面。
The poor axial slinging of the kiln body and the long-term running at one position cause the supporting roller to generate shoulders. Another slinging will break the contact surface.
削平台肩,保持窑筒体上下窜动灵活性。
Suppress a shoulder, and keep the flexibility of the upward and downward slinging of the kiln cylinder.
托轮与轮带接触面产生起毛、脱壳或压溃剥伤。
f contact of a supporting roller and a tyre generates fuzz, shelling or bruises.
轮带与托轮间滑动摩擦增大。
The sliding friction between a tyre and a supporting roller increases.
调整托轮,保证托轮位置正确。
Adjust the supporting roller and ensure the position of the supporting roller is correct.
轮带侧面挡环咬毛、掉铁末、脱落。
托轮轴向推力过大,使轮带与侧面挡环间摩擦挤压力过大。
调整托轮,减轻推力。
Adjust the supporting roller and reduce
35 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 产 生 原 因 处 理 方 法 Common fault Cause Treatment process
A tyre lateral baffle ring bites fuzz or drops scrap iron, and sheds off.
The supporting roller axial thrust is oversize, making the frictional and compressional force between the tyre and the lateral baffle ring oversize.
the thrust.
托轮径向受力过大,使托轮与轮带转动不正常,其间滑动摩擦力增大。
The supporting roller radial stress is oversize, making the rotation of the supporting roller and the tyre abnormal and increasing the sliding friction between them.
调整托轮,减轻负荷。 轮带与垫板间加润滑脂。
Adjust the supporting roller and reduce the load. Add albany grease to the tyre and the liner plate.
轮带内表面与垫板间隙太小,温度过高或间 隙 内 有 粉 尘 、 油 污 、 杂 物 等 。 The clearance between the tyre internal surface and the liner plate is too small, with too high temperature, or there are dust, greasy dirt, dopants, etc. in the clearance.
调整间隙,清理脏物。
轮带与垫板间吹风冷却。
Adjust the clearance and clear off the dirty.
Blow air to the tyre and the liner plate for cooling.
轮带内表面与垫板间咬死
The internal surface of a tyre and a liner plate are seized.
掉砖红窑,窑筒体径向膨胀过大。
The kiln shell turns red as firebricks come off, and the kiln cylinder’s radial expansion is oversize.
见前述,对症处理。
See the above description and handle it accordingly.
磨损所致。
Resulting from abrasion
更换垫板或加垫片。
Replace the liner plate or add packing pieces.
窑筒体窜动性差,固定在某一位置运转过久。
The axial slinging of the kiln cylinder is poor and the rotation at a fixed position is too long.
铲平台肩,保持窑筒体窜动灵活性。
Root out a shoulder and keep the flexibility of the axial slinging of the cylinder.
轮带内表面与垫板间间隙过大,筒体刚性降低
传动大小齿轮接触表面出现台肩
The clearance between a tyre internal surface and a liner plate is oversize, the cylinder rigidity declines, and the contact surface between a driving gearwheel and a pinion shows a
挡轮安装位置是否合适。
Check whether the installation position of the thrust roller.
调整挡轮位置 。
Adjust the position of the thrust roller.
36 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 产 生 原 因 处 理 方 法 Common fault Cause Treatment process
shoulder.
窑筒体弯曲,大小齿轮发生冲击。
The kiln cylinder bends, and a gearwheel and a pinion collide.
调直窑筒体 。
Straighten the kiln cylinder.
大小齿轮的轮齿制造误差。
The gear tooth manufacture of a gearwheel and a pinion has errors
修齿或更换。
Fix or replace the tooth.
大小齿轮啮合间隙不当。
The engagement clearance between a gearwheel and a pinion is not appropriate.
调整啮合间隙。
Adjust the engagement clearance.
小齿轮轴与联轴器中心线不同心。
The pinion axle and the coupling center line are of disalignment.
校正中心线。
Correct the center line.
轴承紧固螺栓或地脚螺栓松动。
A bearing tightening bolt or foundation bolt is loose.
及时紧固。
Do tightening in time.
基础底板刚度不够。
The foundation mat rigidity is not enough.
加固底板,提高稳定性。
Reinforce the bottom plates and raise stability.
传动轴承摆动、振动
The drive bearing swings and vibrates.
轴承损坏 A bearing is damaged. 更换轴承 Replace the bearing.
窑筒体振动,有冲击,超负荷。
The kiln cylinder vibrates and has impact and overload.
见前述。
See the description above
油不清洁,有杂物或粘度不够。
The oil is not clean, has dopants or its viscosity is not enough.
清洗、清除杂物,换新油。
Clear away the dopants and change new oil.
齿轮表面材质疲劳,强度不够。
The gear surface material has fatigue and its strength is not enough.
必要时更换减速器齿轮。
Replace the reducer gears when it's necessary.
主减速器齿轮表面产生点蚀、裂纹、剥落等损伤
The main reducer’s gear surface generates damage such as pitting corrosion, cracks, flaking, etc.
齿轮啮合不良,受力不均匀。
The gears engagement is bad and its stress is nonuniform.
及时调整,保证良好啮合。
Make adjustment in time and guarantee good engagement.
主减速器壳体表面温度高
油少、不清洁、冷却水中断。 补加油或清洗换新油,及时恢复冷却水或采用临时降温措施。
37 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 产 生 原 因 处 理 方 法 Common fault Cause Treatment process
The oil is little and is not clean, and the cooling water is discontinued.
Add oil or clean it to change new oil, restore the cooling water or take measures to reduce heat in time.
The main reducer housing body surface temperature is high.
受窑筒体上辐射影响。
Subjected to the kiln cylinder radiation
加强隔热措施。
Intensify heat insulation.
地脚螺栓松动。
A foundation bolt is loose.
紧固地脚螺栓。
Tighten the foundation bolt.
电动机与联轴器中心线不同心。
The motor and the coupling center line are of disalignment.
校正中心线。
Correct the center lines.
电动机振动
An motor vibrates
轴承损坏,转子与定子摩擦。
A bearing is damaged, and the rotor and the stator produce friction.
更换轴承,检查、调整间隙。
Replace the bearing, and check and adjust the clearance.
接线松脱或断掉。
The wiring is loose or broken off.
重新接线,并要牢靠。
Afresh connect the wiring, and it shall be firm and reliable.
通风不良 Bad-ventilated 采取临时降温措施,加强通风。
Take measures for temporary heat reduction and intensify ventilation.
受窑筒体热辐射影响。
Subjected to the kiln cylinder’s heat radiation
加强隔热措施。
Intensify heat reduction
电动机外壳发热
The motor shell emits heat.
转子或定子线圈损坏。
The rotor or stator coil is damaged.
拆装检修。
Dismantle and install it for an overhaul.
窑皮增厚、增长。
The kiln skin grows thick and long.
减少风、煤、料,处理窑皮。
Reduce wind, coal and materials, and treat the kiln skin.
窑内结圈。
Rings are formed inside the kiln.
处理结圈。
Treat the formed rings.
托轮推力方向不一致
The supporting roller thrust direction is of anticoincidence.
调整托轮,保持正确推力方向。
Adjust the supporting roller, and keep a correct thrust direction.
托轮轴承润滑不良。
The lubrication of a supporting roller bearing is bad.
改善润滑,加强管理。
Improve lubrication and intensify management.
电动机电流增高
The motor current increases.
窑筒体弯曲。
The kiln cylinder is bent.
见前述。
See the description above.
38 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 产 生 原 因 处 理 方 法 Common fault Cause Treatment process
筒体旋转受阻。
The cylinder rotation gets difficulty.
检查如油勺等。
Check the oil dipper, etc.
电动机本身出现故障。
The electric motor fails
详细检查,更换有缺陷零件。
Make detailed inspection and replace the defective accessories.
油泵故障。
The oil pump breaks down.
检查油泵 Check the oil pump.
油温偏高。
The oil temperature is on the high side.
采取降温措施。
Take measures for heat reduction.
挡轮油泵站油压低
The thrust roller oil pump station’s oil pressure is low. 油量调速阀未调节合适。
The oil amount speed control valve is not adjusted properly.
调节油量调速阀到合适位置。
Adjust the oil amount speed control valve to a proper position.
窑胴体轴向下滑力大。
The kiln body’s axial downward slip force is great.
调整窑胴体轮带与托轮之间的受力状况。
Adjust the stressed state of a kiln body tyre and a supporting roller.
挡轮油泵站回油速度过快
The thrust roller oil pump station’s back oil speed is too quick.
截止阀工作不正常。
The working of a stop valve is not normal.
更换截止阀。
Replace a stop valve.
窑头钢片与风冷套间隙过大。
The clearance between the kiln outlet sheet steel and the air cooling set is oversize.
调整重锤,增大紧捆力。
Adjust the heavy bob and enlarge the tightening force.
窑尾两摩擦环间隙不均或过大。
The clearance between the two friction rings at the kiln inlet is not even or oversize.
检查气缸或进气系统,并及时处理 Check the cylinder or the air inlet system, and give treatment in time.
窑头、窑尾密封严重漏风
The sealing of the kiln outlet and the kiln inlet leaks air seriously.
窑尾径向密封盘根失效。
The kiln inlet radial sealing packing fails.
更换盘根。
Replace the packing.
注:主传动、减速机、稀油站的具体维护和事故处理见设备说明书。
Note: For the concrete maintenance and accident disposal for the main drive, speed reduction unit and thin oil station, see the equipment manual.
3.5.2窑及分解炉燃烧器 Kiln and Precalciner Burner
本项目的窑及分解炉燃烧器系统由PiILLARD公司提供,窑及分解炉燃烧器系统分别由窑燃烧器及供油、供气系统和分解炉燃烧器及供油、供气系统组成。The kiln and the precalciner burner system for
39 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
this project are provided by the PiILLARD company. The kiln and the precalciner burner system consist of a kiln burner, oil and gas supply system and a precalciner burner.
3.5.2.1 主要技术性能 Main Technical Performances
序号No.
内 容
Contents
技 术 指 标
Techincal Date
1 窑燃烧器输出(设计值)
Kiln burner output(design value) 168.5 MW
燃烧器输出(最大)
Burner output(maximum) 188 MW
燃烧器热端长度
Burner hot end length 7 m
总长(约计)
Total length(approx.) 12 m
包括耐火内衬的总重量(约计)
Total weight including fire-proof lining(approx.)
13 000 kg
耐火衬砌厚度 Refractory lining thickness 80 mm
主要空气流速 Main air flow rate 18 800 Nm3/hr
设计油流速 Designed oil flow rate 14 740 kg/hr
最大油流速 Maximum oil flow rate 16 500 kg/hr
设计天然气流量 Designed natural gas flow rate
19 850 Nm3/hr
最大天然气流量 Maximum natural gas flow rate
22 600 Nm3/hr
2 分解炉燃烧器输出(每个燃烧器的设计值)
Precalciner burner output(design value for each burner)
67 MW
燃烧器输出(最大)
Burner output(maximum) 75 MW
数量 Quantity 4
燃烧器热端长度 Burner hot end length 1.1 m
耐火衬砌 Refractory lining 60 mm
主要空气流量(4 个燃烧器)
Main air flow rate(4 burners) 25 450 Nm3/hr
40 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
内 容 技 术 指 标 序号No. Contents Techincal Date
4 个燃烧器用油的总流速的设计值
Design value of total current velocity for 4 burners’ oil consumption
23 440 kg/hr
4 个燃烧器用油的总流速的最大值 Maximum value of total current velocity for 4 burners’ oil consumption
26 400 kg/hr
天然气流量的设计值(4 个燃烧器)
Design value of natural gas flow rate (4 burners)
31 220 Nm3/hr
天然气流量的最大值(4 个燃烧器)Maximum value of natural gas flow rate (4 burners)
35 160 Nm3/hr
3 窑燃烧器的一次风机
Primary fan for kiln burner
静压 Static pressure 20 000Pa
流量 Flow rate 20 400Nm3/hr
装机功率 Installed power 200kw
电机转速 Motor revolving speed 3588rpm
4 分 解 炉 燃 烧 器 冷 却 风 机 Cooling fan for precalciner burner
静压 Static pressure 12 000Pa
流量 Flow rate 28 400Nm3/hr
装机功率 Installed power 160kw
电机转速 Motor revolving speed 3586rpm
3.5.2.2 窑及分解炉燃烧器系统的简单描述 Simple Description of the Kiln and the Precalciner Burner System
The kiln burner is shored by a hanging cart and has an electric moving apparatus. The burner can be adjusted for 3 °up and down, left and right respectively. The fuels to be used in this project are natural gas and base oil, therefore on the kiln outlet platform, the natural gas and crude oil control valve train respectively control the fuel dosage of a burner. The control valve train for natural gas is directly connected with the gas supply pipeline of a pressure reduction station. The control valve train for crude oil is directly connected with the oil supply pipeline and crude oil pipeline for a high pressure pump on the kiln outlet. 8~10% of combustion air is provided by the primary fan, which has a standby fan.
41 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
There are 4 precalciner burners, which are directly fixed on the precalciner body with brackets. The kiln inlet 3FL(42.040m)plane surface is equipped with main control valve train for natural gas and crude oil. While natural gas is burned, the main control valve train for burning gas respectively control 4 independent valve train for natural gas, and the 4 independent valve train for natural gas respectively control the gas-burning quantities of 4 burners. While oil is burned, the main control valve train for burning oil respectively control 4 independent valve train for crude oil, and the 4 independent valve train for crude oil respectively control the oil-burning quantities of 4 burners. The main control valve train for natural gas is directly connected with a gas supply pipe line of a pressure reduction station. The main control valve train for crude oil is directly connected with an oil supply pipe line and oil return pipe line of a precalciner high-pressure pump. 4~6% of combustion air is provided by the precalciner burner.
If the viscosity of the crude oil purchased by the factory is on the high side, a heater in the high-pressure pump oil supply system shall be started to ensure the atomization of the crude oil at a burner nozzle.
a, Make sure that the states(normal opening and normal closing) of all pipe fittings, apparatuses(pumps, pressure gauges),control switches and automatic valve are under good connection and conform to the service conditions in accordance with the manual or drawings.
b, Make sure that all electric apparatus cabinet master switches have already been shut down, all control cabinets have been powered off and the connection of all wirings meet the technical requirements of the manual or drawings;
c. 核查所有连续式报警系统和热保护装置都已经到位,可确保不同流体的使用性能;
C. Make sure that all continuous alarm systems and thermal protection devices have all been in place and can ensure the functional performance of a different fluid;
d. 泵和鼓风机能自由地手动进行旋转,所有手动阀安装正确,调节灵活;
d. A pump and a fan can revolve freely by hand operation, and the installation of all hand operated valves shall be exact, with flexible adjustment;
e. 所有的安装符合安全要求,经过必要的安全测试。
42 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
e. A pump and a fan can revolve freely by hand operation, and the installation of all hand operated valves shall be exact, with flexible adjustment;
3.5.2.4 启动程序 Startup Procedure
1) 窑燃烧器的启动程序 Startup procedure of kiln burner
A.燃油 Fuel Oil
a. 在启动窑燃烧器以前,按计划先启动供油的高压泵和循环系统;
a. Before starting the kiln burner, first start the oil supplying high pressure pump and circulating system as scheduled;
b. After receiving an ignition command, recheck whether the settings of the position of burner valve and the position of a burner meet the specified requirements and confirm whether a lighter and a blow gun are at the stipulated positions;
c. 开启一次风机检查出口压力;
c. Turn on the primary fan and check the outlet pressure;
d. 点火器的安全启动联锁允许点火器工作;
d. The safety starting interlock of a lighter shall allow the working of the lighter;
e. 启动点火器并检查点火枪是否形成了一定能量的稳定火焰;
e. Start the lighter and check whether a firing gun has formed a stable flame with certain energy;
f. 打开窑头燃油阀组的流量阀;
f. Unbolt the flow rate valve of the kiln outlet oil-burning valve set;
g. Wait for the appearance of a burner flame, unbolt the central wind to the specified position of 8, unbolt the radial wind and axial wind valves, and adjust the span and proportion to stabilize the flame;
h. 当火焰形成并稳定,关闭点火枪;
h. When a flame has been formed and stabilized, close the firing gun;
i. 记录如下内容:每一路风的压力、阀的位置、燃油的压力,这些数据被用于以后燃烧器点火启动参考。
i. Record the contents as follows: Air pressure on each circuit, the position of a valve, fuel oil pressure. These data are used as references for the later ignition startup of a burner.
43 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
a. The startup procedure of gas burning is fundamentally the same as that of oil burning, but what is different is that it does not need to start an oil-supplying high pressure pump and circulating system, but need to start the gas supply valve of a natural gas pressure reduction station.
b. 点火枪火焰形成后,打开窑头燃气阀组的流量阀。
b. Unbolt the flow rate valve of the kiln outlet gas burning valve set after a firing gun flame is formed.
2) 分解炉燃烧器的启动程序 Startup procedure of precalciner burner
A.燃油 Oil Burning
a. 在启动分解炉燃烧器以前,按计划先启动供油的高压泵和循环系统。
a, Before starting a precalciner burner, first start an oil supplying high pressure pump and circulating system.
b. 再一次核查燃烧器的阀门位置和燃烧器位置设定已符合规定的要求;
b. Recheck whether the settings of the position of a burner valve and that of a burner have met the specified requirements;
c. 分解炉出口温度可满足点火要求,并接到分解炉燃烧器点火指令;
c. The precalciner outlet temperature shall satisfy the ignition requirement and a precalciner burner firing command has been received;
d. 开启分解炉燃烧器风机并检查出口压力
d. Start the precalciner burner fan and inspect the outlet pressure.
e. 安全启动联锁允许分解炉燃烧器启动
e. The safety startup interlock shall allow the startup of a precalciner burner.
f. 启动分解炉燃烧器。启动分解炉燃烧器的程序有两种选择:同时启动 2 个或同时启动 4 个。
f. Start a precalciner burner. There are two procedures for starting a precalciner burner for selection: simultaneously starting 2 burners or simultaneously starting 4 burners.
g. 打开分解炉燃油阀组的流量阀
g. Unbolt the flow rate valve of the precalciner oil burning valve train.
h. 记录如下内容:每一路压力值、阀的位置、燃油的压力,这些数据被用于以后燃烧器点火启动参考。
h. Record the contents as follows: each path pressure value, valve position, oil burning pressure. These data are used as references for later burner ignition startup.
44 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
a. The startup procedure of gas burning is fundamentally the same as that oil burning, but what is different is that gas burning does not need to start an oil-supplying high pressure pump and circulating system but needs to start the gas supply valve of a natural gas pressure reduction station.
b. 启动分解炉燃烧器后,打开分解炉燃气阀组的流量阀。
b. Unbolt the flow rate valve of the precalciner gas-burning valve train after starting a precalciner burner.
The heater apparatus is connected in series in the high pressure oil pump system. The startup or stopping of the heater is controlled by the outlet temperature. When the oil temperature is lower than or higher than a preset temperature, the heater will automatically start or stop an electric heater.
a. After the successful ignition of a kiln outlet burner, it is necessary to adjust the temperature rise speed according to the kiln temperature rise requirements. But the flame adjustment of a burner shall be done in steps in accordance with the requirements of the operating manual of the burner.
b. 要注意区分“冷窑点火”和“热窑点火”的操作。
b. It is necessary to distinguish the "cold kiln ignition" operation from the "hot kiln ignition" operation.
c. 要注意无燃料通道的供风冷却
c. It is necessary to note the air supply cooling of a no-fuel channel.
d. The adjustment of the kiln outlet and a precalciner burner shall be basically in accordance with the process requirements and safety control requirements of the system, therefore it is necessary to adjust the burner and the flame shape according to the Pillard operating manual.
45 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
3.5.2.6 停车及事故应急处理 Shutdown and Emergency Treatment
a. The normal shutdown shall be according to the burning circumstance of a kiln system, gradually reducing materials and adjusting the flow rate valve of the burner valve train. After the precalciner burner stops, the flow rate of a precalciner burner fan shall be adjusted to keep operation until reaching a safe temperature.
b. 分解炉燃烧器停车后,会立即启动阀组的吹扫、保安程序。
b. After a precalciner burner stops, the purging and security procedure of the valve train will be immediately started.
c. The operation of the primary fan shall be maintained after the shutdown of a kiln outlet burner until reaching the low of a safe temperature. If the kiln is not in use for a long time, a kiln burner shall be pulled out in order to prevent it from being burnt down.
d. 窑燃烧器停车后,会立即启动阀组的吹扫、保安程序。
d, After a kiln burner stops, the purging and security procedure of the valve train will be immediately started.
e. If a kiln outlet burner’s primary fan has to be stopped because of mechanical trouble, you may start the standby fan in advance. If both fans have mechanical trouble and have to be shut down, it is necessary to start the kiln stopping procedure, then stop the burner and start an emergency fan to cool the burner nozzle. Certainly, the possibility for this circumstance to appear is infinitesimal.
f. 分解炉燃烧器的风机出现机械故障必须停机,则分解炉燃烧器将进入停车程序。
f. If a fan of a precalciner burner has mechanical trouble, it has to be shut down, and then the precalciner burner will enter a shutdown procedure.
3.5.3 篦冷机 Grate Cooler
本项目的篦冷机由IKN公司提供,篦冷机分别由篦冷机的本体、篦床驱动系统、辊式破碎机、送灰系统、空气炮系统及相应的控制系统组成。The grate coolers for this project are provided by the IKN company. A grate cooler consists of a grate cooler main body, a grate bed drive system, a roll crusher, an ash-feeding system, an air cannon system and corresponding control systems.
3.5.3.1主要技术性能 Main Technical Performances
46 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
序号No.
内 容
Contents
技 术 指 标
Technical Index
1 生产能力 Productive capacity 11000 t/d
2 篦床有效面积
Grate bed effective area
250m2
3 单位篦板有效面积负荷
Load on unit grate board effective area
44 t/m2.d
4 进料温度
Charging temperature
1400℃
5 出料温度
Discharging temperature
65℃+环境温度
冲 程 次 数 ( 额 定 ) Stroke frequency (rating)
15 次/min
6
篦
床Grate bed 冲程 Stroke 140mm
液 压 传 动 hydraulic drive
2 段 2 sections
7
篦 床 传动 装 置Grate bed drive unit
电动机功率
Motor power
3×150 kW (其中一台备用)
(One motor for standby)
型号、规格
Model and specification
6×4.8m, 6 个辊子,工作宽度:4.8m
6 × 4.8 m, 6 rollers, working width:4.8m
出料粒径
Discharged particle size
95% <25mm
辊的工作温度
Working temperature of roller
150~200℃
额定速度
Rated speed 3~5 r/min
8
熟 料 破碎 机Clinker crusher
传动装置
Drive unit 6×18kW
3.5.3.2 主要结构和控制元件概述 Summary of Main Structures and Control Elements
47 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
Grate beds of the grate cooler includes KIDS1# and 1# section grate bed at the entry and KIDS 2# and 2# section grate bed at the back of the rolling breaker. KIDS 1# and KIDS 2# are fixed beds, while 1# section grate bed and 2# section grate bed are movable beds. The fixed bed KIDS1# has 10 rows of grid plates in total, and it is equipped with 3 cooling fans. The beam style air supply is adopted. 6 thermocouples have been installed at the bottom of each coanda nozzle of front 4 rows of grid plates respectively. The 1# second grate bed has 74 rows of grate plates, and it is divided into 7 chambers and equipped with 7 air-blowers. 6 and 2 thermocouples are equipped at the bottom of coanda nozzle of front two chambers respectively. The fixed bed KIDS2# has 4 rows of grate plates. The 2# section grate bed has 31 rows of grate plates, and it is divided into 3 chambers and equipped with 3 air-blowers. The frequency control is adopted for air regulation of the cooling fans of KIDS1# and 1# section grate beds. The inlet ventilation door adjustment is adopted for air regulation of the KIDS 2# and 2# section grate beds. While the air distribution of the grid plate at the head end of KIDS1# is adjusted by the turning board on the Y-type air-supply line and regulating plate on the air pipe.
篦冷机上的检修门均设有安全保护系统被联锁到系统中。
All of the access doors on the grate cooler are equipped with security protection system, and have been interlocked into the system.
The hydraulic system mainly includes following parts: hydraulic pump station, 1#and 2# driving hydraulic cylinders of 1#section grate bed, 3#driving hydraulic cylinder of 2#section grate bed, switch cupboard and the field control station with control system and operation panel.
The hydraulic pump station is equipped with 3 driving pumps (GD), the oil/water cooler, oil temperature control circuit of oil filter, oil tank, compressed air station, and the hydraulic control board (HCB). Under normal circumstances, 2 of the 3 driving pumps work, and 1 driving pump is standby. One of the working pump bears major load, and the other working pump bears the peak load. Under running conditions, the tasks of the major load pump and the peak load pump vary periodically in order to guarantee the even load of these two pumps. Functions and operations of these 3 driving pumps could be exchanged with each other. Monitoring contents of the control
48 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
system of the grate bed driving system include: oil temperature, oil level, oil cleaner, pump valve position, water quantity of the oil cooler, water content of the hydraulic oil and etc. These contents are all displayed on the hydraulic control board.
The driving of grate beds is realized by hydraulic cylinder 1# and hydraulic cylinder 2# pushing the grate bed 1#, and hydraulic cylinder 3# pushing the grate bed #2.The stroke of the hydraulic cylinder is controlled by the oil way control system, which is composed of the proportioning valve, electromagnetic displacement measurement and control valve and so on. The designed stroke is 140 mm. While the actual stroke in running need to be adjusted on the operation panel by IKN field debugging engineer, and should not be changed afterwards. The running speed of the grate bed is determined by the stroke times of the hydraulic cylinder. The number of cylinder stroke times is set according to actual demand. In the central control area, the setting travel speed of the grate bed will be transferred to the axial motion control system by PLC. The axial motion control system will work out the velocity amplitude and send it to corresponding electric component control driving. The displacement sensor in the hydraulic cylinder will send the signal to axial motion control system. The axial motion control system will use this signal to work out the true velocity of the grate bed, and compare it with the setting value, in order to realize the control of running speed. The rated speed of the grate bed is 15 times/min.
The roller crusher is located between the 1# section and 2 # section grate beds, and is used for breaking of big pieces of clinkers. The roll surface of the breaker is curved, and is equipped with a roll ring. There are 6 rollers in total. Each of the rollers is equipped with drive motor and heliocentric-type reducer. The temperature, current and rotation direction of each motor are monitored by the control system; Blade are installed on the shaft end of each roller, and the rotation speed of the blade is counted by the proximity switch, thus realizing the control of the speed. The centralized lubricating system lubricates the spherical surface ball bearings at two ends of the roller. The control system monitors the lubrication interval, lubrication time and oil level of the oil tank of the lubrication system; The bearing temperature is monitored by thermal resistance thermometric indicator; Each roller is equipped with an independent water circulation cooling system, and the flow rate and temperature of the returning water are monitored; The frame girder of the roller crusher is equipped with the wind cooling system. The control boards are equipped at both the local and the central control; therefore, the running condition of the breaker
49 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
could be monitored both at the central control and at the field.
The ash conveying system of this grate cooler includes two parts: The first part is the PHD (Pneumatic Hopper Drainage) system configured at the bottom of the 1# section grate bed. This system sets up 14 ash-collecting boxes at the bottom of 7 air chambers of the 1# section grate bed. The ash-collecting boxes belong to two ash pipes respectively. The ash will be transported to the ash-collecting bin by air delivery, and then sent to the clinker bucket conveyer by the chute. The ash conveying time and frequency of each ash-collecting box are controlled by time. The charge level indicator is installed at the top of the ash-collecting box. The high material level detected by the charge level indicator will be displayed at the central control. If the high material level is stilled detected after 3 discharge circulations, the alarm signal will be issued to notify the worker to check and handle it. The second part is the ash system installed at the bottom of the 2# grate bed, which is called the Slide Gate system for short. This system sets up 6 ash-collecting hoppers equipped with 6 air-operated gates at the bottom of 3 air chambers of the 2# grate bed. When the gate valve is opened, the ash deposit will fall into the clinker bucket conveyer directly. The opening of the gate valve could be controlled by the material level or by time. If the material level control is adopted, the control method is as follows: The opening time and opening frequency of each gate valve of the ash-collecting hopper are controlled by time. The charge level indicator is installed on the top of the ash-collecting hopper, and when the charge level indicator detects the high material level, the gate valve will also be opened. And, the time control will be reset automatically. If the opening time of a bunker gate is too long, the alarm signal will be issued, and the gate valve must be examined rapidly. If the signal of high material level has existed for 10 circulations successively, the system will also issue the alarm. If the time control is adopted: The fixed opening time and time-delay of each gate valve are set up. While the opening time plus the time-delay is the time being monitored. If the time monitored is overtime, the alarm signal will be issued to notify the worker to examine and handle it. If the high material level occurs between openings of the gate valve, the gate valve will also be opened automatically.
11 sets of air cannons are installed at the feed end of the grate cooler, among others, 2 sets of 8-litre air cannons are used for blocking-clearing of the ash-discharge pipe of the ash hopper of the sealing device of the kiln outlet.9 sets of air cannons are use for clearing large pieces and
50 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
excessive material piles for the KIDS1# part of the grate cooler. The operation of the air cannon has two modes, the automation and hand motion. When the automation mode is selected, each air cannon will run according to the setting program. When the hand motion mode is selected, the air cannons could be operated by selection. Under normal circumstances, the automation mode should be selected. Under abnormal circumstances, the hand motion mode should be selected.
According to functions of the grate cooler, the control system is divided into several independent control systems: the grate bed driving system, roller crusher system, ash conveying system and air cannon system. Relative interlocking signals of these systems are connected with each other, thus forming the control system of the grate cooler.
3.5.3.3 开机前的准备 Preparation before Startup
1) 篦冷机的本体 Main part of grate cooler
a. KIDS1#部分的所有调节板全开,Y 形风管的所有调节板置于中间位置。
a. All adjustable plates of the KIDS 1# part and all adjustable plates of a Y-shape air duct shall be placed at a middle position.
b. 冷却机冷却区域内的卸灰滑动门全部开着。
b. All the ash-unloading slide gate inside a cooler’s cooling realm shall be open.
c. 风机启动前应除去砌筑时留有的杂物。
c. The dopants left during masonry shall be removed before a fan starts.
d. 清除沾粘在篦缝周围的杂物,尤其注意清除掉篦缝中的焊条、钢片等。
d. Clear away the dopants stuck around a grate seam, especially the welding rods, sheet steel, etc. dropped into a grate slot.
e. 再按风机所管辖的区域,开足风机,用软木锤敲打篦板两侧,通过振动和风机的喷吹力,进一步清除沾粘在篦缝周围的杂物,保持篦缝清洁、整齐。但要注意敲打的力度,以免损坏篦板。
e. Aiming at the realm controlled by a fan, turn on the fan to the full extent, use a soft wood hammer to knock the two sides of a grate plate and by relying on vibration and the spray blowing force of the fan, further clear away the dopants stuck around the grate slot so as to keep the slot clean and tidy. But it is necessary to note the strength of the percussion in order to avoid damaging the grate plate.
f. 在烘窑阶段应在 KIDS 部分覆盖上 20~30mm 厚的碎耐火砖或冷熟料,以避免烘窑的高温辐射热损坏喷嘴。
f. At the stage of drying and heat-up the kiln, the KIDS part shall be covered with 20~30 mm-thick rubble firebrick or cold clinker to prevent the high-temperature radiant heat from drying the kiln from damaging a nozzle.
51 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
g. 严禁点火的油滴入未覆盖料的篦板上,以免堵死篦缝。
g. Strictly forbid the ignition oil dropping into a grate plate that is not covered with a material in order to avoid stop up a grate slot completely.
h. 进行完上面的工作后关闭所有检修门。
h. Close all access doors after finishing the above operations.
2)篦床驱动系统 Grate bed drive system
a. 确认泵的接线和旋向正确
a. Make sure that the wiring and revolving direction of a pump are correct.
b. 确认篦床驱动系统的管路、储压罐、驱动液压缸等已清洗完毕并确认不泄漏,然后按要求重新注油。
b. Make sure that the pipeline, pressure storage tank, hydraulic drive cylinder and so on for a grate bed drive system have been cleaned and confirm no leakage, and then afresh inject oil as required.
c. 液压系统脱气、篦板驱动液压缸系统的压力试验、系统中减压阀的调整完成。
c. The degassing of the hydraulic system, the pressure test for the grate drive hydraulic cylinder system, and the adjustment of a reducing valve in the system has been completed.
3) 辊式破碎机 Roller Crusher
a. 辊式破碎机设有远程控制面板和就地控制面板,检查控制面板上的显示信号灯是否完好。单个启动每一个辊,检查辊的旋向,确认实际旋向三统一。即实际旋向与远程控制面板与就地控制面板显示统一。
a. The roller crusher is equipped with a remote control panel and a local control panel. Check whether the signal display lamp on a control panel is intact or not. Start a single roller, check the revolving direction of the roller, and make sure that an actual revolving direction and what are displayed on the remote control panel and on the local control panel are unified.
b. 确认水冷却、风冷却、油润滑管线的连接完好,无泄漏。
b. Make sure that the connection of the water cooling, air cooling and oil lubrication pipe lines is intact and they have no leakage.
c. 确认破碎辊的过载保护、速度检测、轴承的温度检测装置有效、显示正确。
c. Make sure that the overload protection of a crushing roller, speed examination and a bearing temperature-detecting device are effective and have correct displays.
d. 确认破碎机已回复到它的运行位置,并已按规定固定。
d. Make sure that a crusher has already returned to its operating position and has been fixed by rule.
52 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
4) 输灰系统 Ash Conveyance System
a. PHD 系统的阀门、管线、控制信号的调试已完成并确认符号规定要求;
a. The debugging of a valve, pipe line and control signal of the PHD system has already been completed and make sure that the debugging meets the specified requirements;
b. 确认 PHD 系统中的料位计有效,信号正常。
b. Make sure that the charge level indicator of the PHD system is effective and its signals are normal.
c. 灰斗卸灰的滑动门轨道、导向螺栓、滑板运行正常,密封正常;
c. The unloading slide door track, guide bolt and sliding plate of an ash hopper shall function and shall be sealed normally;
d. 确认管线连接完好,无泄漏,压缩空气的供气压力符合要求。
d. Make sure that the connection of the pipe line is intact and has no leakage, and the compressed air supply pressure meets the requirements.
e. 确认料位计有效且信号正常,接近开关和电磁阀信号正常,控制系统显示与现场一致。
e. Make sure that the charge level indicator is available and its signals are normal, a proximity switch and a solenoid valve have normal signals, and the control system display is consistent with that on the site.
f. 两套输灰系统符合运行要求。
f. The two ash conveyance systems shall meet the service requirements.
5) 空气炮系统 Air Cannon System
a. 确认管线连接完好,无泄漏;
a. Make sure that the pipe line connection is intact and has no leakage;
b. 控制系统工作正常;
b. The control system shall work normally;
c. 压缩空气的供气压力符合要求。
c. The compressed air supply pressure shall meet the requirements.
6) 控制系统组成 Control System Composition
a. 确认控制系统信号正常,远程、就地、现场信号一致;
a. Make sure that the control system has normal signals, and its remote, local and site signals are consistent;
b. 控制面板显示信号正确。
53 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
b. The control panel shall display correct signals.
After the clinker conveyance, dust catchers and vent air fan have been started, the grate cooler system’s normal group startup sequence is as follows:
Cooling fans #11~#14 → cooling fans #4~#10 → cooling fans #1~#3 →grate bed #2 hydraulic drive →roller crusher →grate bed #1 hydraulic drive →slide door, PHD →air cannon unit
The normal group closedown sequence is contrary to the above-mentioned sequence.
1) 篦冷机的本体 Main Part of Grate Cooler
a. 设备启动前一定要关闭所有检修门
a. Before equipment startup, you must close all access doors.
b. 在窑的点火、烘窑阶段,如果需要开冷却风机,应该开 KIDS1#部分后面的风机,作为燃烧用空气。
b. If at the stage of kiln ignition and drying, it is necessary to turn on cooling fans, you should turn on those at the back of the KIDS 1# section to provide combustion air.
c. 窑在升温阶段要注意,如果喷嘴的温度上升至 80℃,应启动风机,并在最小流量下运行。
c. At the stage of kiln temperature rise, it is necessary to note that if the temperature of a nozzle rises to 80 ℃, you should start a fan and have it run at the lowest flow rate.
d. 当 KIDS1#部分的熟料堆到 1.5m 时,应启动 KIDS1#部分的 3 台冷却风机。
d. When the clinker at the KIDS 1# part has been piled up to 1.5 m, you should start 3 cooling fans at the KIDS 1# part.
e. KIDS1#部分的冷却风机流量调节应参照 IKN 提供的流量曲线或由按 IKN 的调试工程师指定的要求进行。
e. The cooling fan flow control of the KIDS 1# part shall conform to the flow curves that IKN provides or to the requirements that IKN debugging engineers designate.
f. 如果熟料被吹离 KIDS 表面,应减少风机的供风量,保持住熟料在 KIDS1#上的斜坡。
f. If clinker is blown off the KIDS surface, you should slash the fan air volume to retain the slope of the clinker on KIDS 1#.
g. 注意推动篦床的速度、风机、空气炮调节应适当,使熟料层能覆盖住 KIDS1#部分的篦板,而不至于烧坏篦板。
g. Note that the adjustment of a speed for pushing a grate bed, of a fan and of an air cannon
54 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
should be appropriate, making a clinker layer able to cover the grate plate of the KIDS 1# part so as not to burn down the grate plate.
h. 在开始阶段,如果需减小 KIDS1#部分的料堆高度,可加快 1 段篦床的推动速度。
h. If at the beginning stage, it is necessary to reduce the material stack height of the KIDS 1# part, you may quicken the pushing speed of the section-1 grate bed.
i. 在操作期间,所有的冷却风机调节必须按 IKN 提供的流量曲线或由按 IKN 的调试工程师指定的要求进行。
i. During the period of operation, the adjustment of all cooling fans shall conform to the flow curves that IKN provides or to the requirements that IKN debugging engineers designate.
j. 当窑连续输出熟料时,篦速的调节必须按 IKN 制订的要求或按 IKN 的调试工程师现场给定的要求进行。
j. While the kiln is outputting clinker continuously, the adjustment of a grate speed shall conform to the flow curves that IKN provides or to the requirements that IKN debugging engineers designate on the spot.
k. 为保证最优化的篦冷机操作,每次只能调整一个参数,等待结果,这样窑和冷却机的操作才能稳定。
k. In order to ensure the optimal operation of a grate cooler, only one parameter may be adjusted each time to wait for a result so that the operation of the kiln and the cooler can be stabilized.
2) 篦床驱动系统 Grate bed drive system
a. 篦床的驱动是通过 1#、2#液压缸推动篦床 1#,3#液压缸推动篦床 2#实现的。汽缸的冲程由比例阀、电磁位移测量、控制阀等组成的油路系统通过 PLC 实现篦床的运动控制。
a. The grate bed drive is realized by hydraulic cylinders 1# and 2# pushing grate bed 1# and hydraulic cylinder 3# pushing grate bed 2#.The stroke of the cylinder is measured by a proportioning valve and electromagnetic displacement. The oil route system consisting of control valves, etc. uses PLC to realize the motion control of a grate bed.
b. 操作中只要根据篦床 4#风室的显示压力,来设定 1#篦床的速度。而两者的关系按 IKN 提供的压力与 1#篦床速度曲线即 P~GS 曲线调节。或者按窑产量与对应的 1#篦床速度的样板表格调节。
b. In operation, it is necessary to set the speed of grate bed 1# according to a pressure value displayed at the grate bed 4# air chamber. The relations between the two shall be adjusted according to the pressure and 1# grate speed curves or P~GS curves provided by IKN or to the model table of the kiln outputs and their corresponding 1# grate bed speeds.
c. 2#段篦床速度按照 1#段篦床速度的相关比例因子自动或手动调节。
c. The speed of grate bed 2# shall be adjusted automatically or manually according to 1# grate bed speed-related scale factors.
55 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
d. 在篦床运动过程中的温度、压力、油位的监控由控制系统自动实现,但控制系统一旦发出报警,必须及时采取相应的排除措施。
d. The monitoring and control of the temperature, pressure and oil level during the process of the grate bed motion are automatically realized by the control system, but once the control system sends out an alarm, it is necessary to take corresponding measures in time for troubleshooting.
3) 辊式破碎机 Roller Crusher
a. 辊式破碎机内部的启动程序:
a. Inner startup procedure of roller crusher:
b. 启动水冷却系统→启动冷却风机→按标准操作启动辊破→由 DCS 显示辊的旋向→显示辊子的电机电流→查看电机温度的监视→查看速度监测→查看轴承温度监测→查看水温和流量监测
b. Starting water cooling system →starting cooling fan →starting roller crusher pursuant to standard operation →DCS displaying the revolving direction of roller→displaying the current of roller electric motor →looking into electric motor temperature monitoring →looking into speed monitoring →looking into bearing temperature monitoring →looking into water temperature and flow rate monitoring
c. 辊式破碎机在运行过程中,若遇大块、或铁块辊的电机会有过载报警,若在自动控制模式,过载辊会自动执行过载保护操作。若在手动控制模式,必须手动执行过载保护操作。
c. If during operation, a roller crusher meets a big chunk or iron cake, the roller’s electric motor will send out an overload alarm. In the automatic control mode, an overloaded roller will run the overload protection automatically. In the hand control mode, hand operation shall be used to run overload protection.
d. 辊式破碎机的控制系统设有远程控制和就地控制,轴承温度、电机温度、速度、润滑、油位、水温、水量等均由控制系统进行实时监控,控制系统一旦发出报警,必须及时采取相应的排除措施。
d. The control system of a roll crusher is equipped with remote control and local control. The bearing temperature, electric motor temperature, speed, lubrication, oil level, water temperature, water amount, etc are all under the real-time monitoring of the control system.
4) 输灰系统 Ash Conveyance System
a. 篦床 1#的 PHD 系统卸灰和篦床 2#的灰斗移门卸灰系统都配有自动控制系统,根据时间或料位控制卸料,并对系统的运行实时监控。
a. The ash-unloading system of grate bed 1# PHD and the grate bed 2# ash hopper slide door ash-unloading system all have automatic control systems. Discharging shall be controlled according to time and charge levels and the system operation shall be under real-time monitoring.
56 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
b. 当篦冷机接到启动命令,该系统按规定的开机顺序启动该系统,并选择自动模式。
b. When a grate cooler receives a startup command, the system will be started according to stipulated startup sequence and select the automatic mode.
c. 只要 2#、3#冷却风机的压力大于等于 50mbar 时,PHD 系统就能启动工作。对灰斗滑动门卸灰系统而言,只要压缩空气供气正常系统就能启动工作。
c. As long as the pressure of cooling fans 2# and 3# is greater than or equal to 50 mbar, the PHD system can start operation. For the ash-unloading system of a ash hopper sliding door, as long as compressed air supply is normal, the system can start operation.
d. 运行中控制系统一旦发出报警,必须及时采取相应的排除措施。
d. Once the control system in operation sends out an alarm, it is necessary to take measures for troubleshooting.
e. 在输灰系统工作时,有粉尘逸出。检查排障时必须戴上安全手套和防尘面具。
e. As an ash conveyance system works, dust escapes out. During inspection and troubleshooting, it is necessary to wear safety gloves and dustproof masks.
You may select the manual operation mode when the kiln system ignites a cold kiln or there is an abnormal operation. When the kiln runs normally, select the automatic mode. Start the system according to the stipulated startup sequence.
3.5.3.4.运行维护、停机维护及注意事项 Running Maintenance, Shutdown Maintenance and Points for Attention
1) 篦冷机本体及用风 Main part of grate cooler and air use
a. 正确的调节用风量,能使熟料均匀散布到后面的 1#移动篦床上。通过改变两侧的用风量能使 KIDS1#左右的粗细料均匀分布,来回调节 Y 形风管的挡板,可调节左右边的供风。
a. Correctly adjust an air use volume to make clinker evenly spread on the 1# movable grate bed at the back. Changing the two sides’ air use volumes can make the thick and thin materials on the left and right sides of KIDS 1# uniformly distributed. Adjusting the baffle of the Y-shape air duct backward and forward can regulate the air supply on the left and right sides.
b. 增加供风的一边会使料堆变得平坦,减少供风的一边会使料堆变的陡峭。
b. The side with increased air supply will make a material stack become flat while the side with decreased air supply will make a material stack become steep.
c. 当料床上的料层厚度均匀,则调节就完成,熟料的冷却也变得均匀。
c. When the material layer thickness on a bed becomes even, then the adjustment will be terminated and the cooling of the clinker will also become even.
57 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
d. The fineness of the clinker will vary with the change of calcination conditions, such as a temporarily cold kiln or the alteration of fuel. Thin clinker has good liquidity, therefore, the downward conveyance speed on the KIDS 1# surface is quicker, and a protected clinker layer on the KIDS 1# will become thin, thus raising the temperature of a nozzle.
f. If after the KIDS 1# fans’ flow rates have been slashed by 30%, the rate plate temperature is still unable to be stepped down, then the pushing speed at section 2# shall be lowered.
g. 如果 1#段篦床的喷嘴温度超过 80℃,则应降低 1#段篦床的推动速度。
g. If the nozzle temperature at section 1# grate bed is more than 80 ℃, then you should lower the pushing speed of section 1# grate bed.
h. In the automatic mode, the pushing speed of a grate bed is controlled by the pressure under the grate of 1# chamber at the back of KIDS 1#.The material bed thickness of a grate bed shall be constant, and it shall be ensured that the heat exchange between the air and the clinker will be the best.
i. 如果 1#室的篦下压力增加,说明料床厚度增加,则篦床推动速度要增加。
i . If 1# chamber’s under-grate pressure is increased, it will be shown that the material bed thickness has been increased, and the grate bed pushing speed shall be increased.
j. Note: If a cooling fan flow rate with flow rate control is constant, the grate bed speed control is exclusive. If 1# chamber’s air use volume increases, it will cause pressure to increase, and will also cause the grate bed speed to be quickened, thus leading to a material bed becoming thin without cause.
2) 液压驱动系统 Hydraulic drive system
a. 液压系统在运行时或断开后都处于高压状态,只有等关闭、卸压、冷却后才能进行维修。
a. The hydraulic system is placed in a high-pressure status while it is in operation or is powered off. Only after shutdown, pressure unloading and cooling will repair and
58 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
maintenance be allowable.
b. 在篦床驱动液压缸脱气时,禁止从冷却机的上部或下部进入篦床和风室。
b. During the degassing of a grate bed drive hydraulic cylinder, entering the grate bed and air chamber from the upper part or the lower part of a cooler is prohibited.
c. 在液压系统脱气和进行压力测试时,油有可能喷射出来,小心受伤!戴上防护手套和防护目镜。
c. During the degassing of the hydraulic system and a pressure test, oil may be ejected. Take care not to get hurt! Put on protective gloves and goggles.
d. 在每次计划停窑前,做好液压管路泄漏和损坏的检查工作。
d. Before planning to stop the kiln each time, check whether the hydraulic pipe line has leakage and damage.
e. If the kiln is not in use for a long time, you should discharge the water in an oil/water cooler and pipe line and then use compressed air to clear away the remaining water. It must be done in frosty weather.
f. During cleaning a hydraulic dynamic machine, do not use cotton threads to clean a container and accessory because the fine threads will damage the system. Use cleaning brushes or downless duster cloth added with kerosene or gasoline.
g. After operation for 100 hours for the first time or operation for every 3000 hours since the first time, an oil filter shall be checked. It shall be replaced when necessary.
h. Check the oil level monthly. If necessary, the 10 μ m filter will be used for injecting oil afresh. Often check the oil level during a test run to judge the oil loss and leakage in a pipeline and a hydraulic cylinder.
i. Change oil after operation for 500 hours for the first time. Examine oil once after operation for every 2000 hours since the first time. Replace the oil if necessary.
j. 注油通气阀必须每年更换一次。
59 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
j. An oiling vent valve shall be replaced once each year.
k. 油/水冷却器的维护只能在水回路无压状态进行,测压仪必须显示在 0bar。
k. The maintenance of an oil/water cooler will only be done in the status that the water loop has no pressure, and a load cell shall be shown at 0 bar.
l. 储气罐、油罐、储压罐、油泵、驱动汽缸的维护、更换必须参照相关的操作手册,按规定程序进行。
l. The maintenance and replacement of a gas tank, oil tank, pressure tank, oil pump or drive cylinder shall be according to a related run book and shall be done pursuant to a stipulated procedure.
3) 辊式破碎机 Roller Crusher
a. 注意检查所有破辊轴承温度的监测,检查集中润滑的操作是否恰当,风冷和水冷的操作是否恰当;
a. Monitor the temperatures of all crushing roller bearings and check whether the operation of the concentrated lubrication is appropriate and the operation of the air cooling and water cooling is appropriate;
b. 注意检查中间的辊在过流的情况下能够反转;
b. Make sure that an intermediate roller can turn over under the circumstance of overcurrent;
c. 遇有较长的停窑时间应对辊圈和硬面进行检查,每年至少应检查一次,IKN 推荐,满负荷一年,辊硬面应更 换
c. If the kiln is not in use for a long time, we should check the roller rings and hard surfacing, which shall be done once at least every year. IKN recommends that a roller hard surfacing be replaced after one year of full load.
d. 齿轮装置应按规定时间和要求换润滑油
d. For a gear unit, replace lub oil pursuant to stipulated time and requirements.
e. 油量、类型、换油周期参看技术数据表,换油间隔对操作条件的影响参看齿轮装置说明书
e. For an oil quantity, type, oil changing period, refer to technical data tables. For the impacts of oil changing intervals upon the working conditions, refer to a gear unit manual.
f. 停机换油时,由于润滑油温度高,当心烫伤,操作时必须穿戴防护用品。
f. Beware of burn when stopping the machine for oil replacement as the lub oil temperature is high. It is necessary to wear protective supplies during operation.
g. 拆装后辊轴密封套一定要紧固。如果密封套内钻入熟料粉尘,必须清理后重新固定。
g. The dismantlement or installation of a rear roller sealing sleeve shall be fastened. If clinker dust has entered the sealing sleeve, it is necessary to reinstall it after cleanup.
60 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
h. 为了修理、维护需要,破碎机需拉到它的维修位置,或破碎辊磨损后需更换,此时的拆装和复位操作必须 按设备的操作说明书进行。
h. For the sake of repair and maintenance, a crusher shall be pulled to its repair position. When a crushing roller needs replacement after abrasion, the dismantling, installing and resetting operations shall conform to an equipment operating manual.
i. 复位后的破碎机调试前,应检查确认齿轮装置的润滑油是否加。
i. Before debugging a crusher after being reset, check whether the lub oil of a gear unit has been added or not.
j. 复位后的破碎机应先通过试运行检查各项功能,才能投入正式生产。
j. A crusher after being reset shall first pass a test run to check various functions before being put into formal production.
k. 如果破碎机较长时间停止工作,必须排空辊内和软管中的冷却水,以防冷却水结冰冻坏冷却水管。
k. If a crusher is not in use for a long time, it is necessary to empty a roller and hose of cooling water in order to prevent the cooling water from freezing and frosting a cooling water pipe.
l. 集中润滑是为球形滚珠轴承和破碎机的迷宫密封服务的。该集中润滑的控制与破碎机一起启动。
l. Concentrated lubrication serves the labyrinth seal of a spheroid ball bearing and a crusher. The control of the concentrated lubrication is started together with a crusher.
m. 给集中润滑的储油器加油,必须停电源,以防旋转搅动可能会引起伤害。油的要求见技术参数规范,油不能被污染。
m. Oiling an oil receiver in concentrated lubrication will demand the power supply to be cut off in order to prevent revolving agitation from causing harm. For the oil requirements, see the technical parameter specifications, and the oil shall not be polluted.
n. 如果在加油前储油器已完全空,加油后则应该保持 10min,直到泵恢复它的全部输出。
n. If before oiling, an oil receiver has been completely empty, 10 min shall be reserved after oiling until a pump restores all its output.
o. 集中润滑通过泵和泵元件把送给润滑给油器,由给油器把油脂通过活塞的动作。将油脂慢慢地送到给油器的各出口即分配到轴承和破碎机的迷宫密封,每个活塞的动作都有一个接近开关监控,如果出现堵塞和储油器空,接近开关就不能探测到活塞的运动,将发出报警。此时必须处理。
o. Concentrated lubrication uses a pump and pump elements to pass grease to an oil feeder, which relies on the motion of a piston to slowly send grease to each outlet of the oil feeder, namely the labyrinth seal of the bearing and the crusher. The motion of each piston has a proximity switch for monitoring. If blockage appears and an oil receiver is empty, the proximity switch can not detect the motion of a piston and will send out an alarm.
61 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
Treatment shall be given at this time.
4) 输灰系统 Ash Conveyance System
a. PHD 系统如果不再有料传输,在通常情况下冷却机操作中也能清除堵塞。气动滑动闸门在维护期间应保持关闭,然后必须按 IKN 的操作说明书执行。
a. If the PHD system no longer has material conveyance, under a general condition, the operation of a cooler can also clear away blockage. A pneumatic slide gate shall be kept closed during maintenance. Then observe the IKN operating manual.
b. 冷却机操作中的清堵应注意在滑动闸门阻断热熟料、排料管内熟料冷却后进行,以免烫伤。
b. Clearing away blockage in the operation of a cooler shall be conducted after the slide gate has blocked off hot clinker and the clinker in a discharging pipe has been cooled in order to prevent burn.
c. 灰斗滑动门卸灰系统在维护或检查以前,压缩空气的供气开关必须关,并确保不能启动。
c. Before maintenance and inspection of an ash hopper slide door ash unloading system, the air supply switch for compressed air shall be off and no startup shall be ensured.
d. 移门工作时,会有粉尘串出,现场工作必须穿戴防护手套和面罩。
d. While a movable door is working, dust will come out. For site work, wear protective gloves and masks.
e. 每次停窑期间,必须检查滑板的滑轨和导向螺栓,以免磨损,必要时更换;检查滑板的泄漏、螺旋连接、供气管线、接近开关和电磁阀。
e. During kiln closedown each time, it is necessary to check a sliding track and a guide bolt of a slide plate in order to prevent abrasion. Replace it when it's necessary. Check whether a slide plate has leakage. Check screwed connection, an air supply pipeline, a proximity switch and a solenoid valve.
f. 注意检查密封,如有泄露,密封应重新调节。
f. Check sealing. If there is leakage, sealing shall be readjusted.
g. 在长时间停窑时,所有的仓斗和排料管道都需排空,以免形成涂层而堵塞管道。检查所有仓斗是否全部清空。
g. While the kiln is not in use for a long time, all hoppers and discharging pipes shall be emptied in order to avoid forming a coating to block a pipeline. Check whether all hoppers are emptied.
3.5.3.5 常见故障分析及处理 Common Fault Analysis and Treatment
If a fault appears in a procedure in production, it shall be differentiated according to a different
62 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
circumstance. For an important question, a user, manufacturer and designer shall investigate and analyze the cause, and discuss a treating way together. The causes and treatment processes of some common faults and their causes are briefly described as follows:
常见故障Common Fault
产 生 原 因 Cause
处 理 方 法 Treatment Process
红河 Red river
粗、细料不均匀,并被分离。 Thick and fine materials are nonuniform and are separated.
1.通过调节 KDS1#l 两侧的用风比例;
2.减少外侧用风或增加中间的用风;
3.如果是进口形状不合适,应在下次停窑期间调成适合的形状,必要时不对称也可以。 1.Adjust KDS 1# two sides’ air proportions; 2.Reduce outside air or increase intermediate air; 3.If an inlet shape is unsuited, adjust it into a suitable shape while the kiln is stopped next time, and unsymmetry may also be allowable when necessary.
堆雪人 Snowman
1.细料、料粘
2.掉窑皮、结大块 1.Fine materials are glued; 2.Kiln skins are dropped and formed into big pieces.
1.缩短空气炮运行的时间间隔,消灭大块;
2.当雪人是因为细料形成时,应增加KIDS1#的风机流量。
3.转换空气炮开关到手动模式,选择射击,并调整 KIDS1#区风机的供风量和比例。
4.如果这些操作不能成功,延长操作也无可能性,则必须停窑,冷却后人工处理雪人。
5.必要时在停窑期间重新排列空气炮,以便今后处理大块更有效。 1. Shorten the time interval of air cannon operation and destroy big pieces; 2. If the snowman is formed by fine material, increase the KIDS 1# fan flow rates. 3. Convert the air cannon switch into the manual mode and select Shoot, and adjust the KIDS 1# area’s fan air volume and proportion. 4.If these operations are unsuccessful and lengthening operation is also impossible, then stop the kiln, and after cooling, manually treat the snowman.
63 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 产 生 原 因 处 理 方 法 Common Fault Cause Treatment Process
5. When it's necessary, rearrange the air cannon during a kiln shutdown so that big pieces will be treated more effectively from now on.
跑生料 Kiln rushes
1.窑操作不当
2.原、燃料成分突然改变,条件混乱1.The kiln does not working appropriately. 2. The ingredients of a raw material and fuel change suddenly and the conditions are in confusion.
1.窑必须打慢车或停窑。
2.篦冷机尾部的熟料温度高并继续延伸,篦板速度必须被减(转手动)或停,以保护破碎机或熟料输送设备。 1.The kiln must be set to Slow Run or Stop. 2. If the temperature of the clinker in the rear of a grate cooler is high and continues to rise, the grate plate speed shall be reduced (Use hand operation) or stopped to protect a crusher or clinker conveyer.
储油器空。 The oil receiver is empty.
给储油器加油。并注意除去泵内的空气。Inject oil to the oil receiver and remove the air inside a pump.
油脂内混有空气。 Gr
A pump fo
ease inside has air.
启动中间的润滑。松开出口的减压阀,等待直到油内的气泡排出。 Start intermediate lubrication, loosen the outlet reducing valve and wait until the bubbles in the oil are discharged.
用了不适合的油。 Oil out of character is used.
换油 Change oil.
泵元件的吸入孔被堵塞。 Pump elements suction-eyes are stopped.
卸下泵元件,清洁吸入孔。 Remove the pump elements and clean the suction eyes.
泵元件的活塞磨损。 The piston of a pump elements is abraded.
换泵元件。 Change the pump elements.
集中润滑的泵不能工作
r concentrated lubrication can not work.
检查泵元件的止回阀是否有缺陷和堵塞。 Check whether the nonreturn valve of a pump elements has flaws and blockage or not.
换止回阀。 Change the nonreturn valve.
集中润滑系统堵塞
The concentrated
lubricating system is blocked.
润滑点、管子、给油器堵塞。 A lubrication point, pipe or oil feeder is blocked.
1.修理或换堵塞的给油器
2.检查止回阀,必要时更换。
3.检查管路,排除堵塞 1.Repair or change the blocked oil feeder. 2.Inspect a nonreturn valve. Replace it
64 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 产 生 原 因 处 理 方 法 Common Fault Cause Treatment Process
when it's necessary. 3. Inspect a pipe line and rule out a blockage.
PHD 系统没有料传输 The PHD system has no material conveyance.
排料管堵塞。 The PHD system has no material conveyance.
清除堵塞。 Clear away the blockage.
滑板不能到达最终的位置。 The slide plate can not arrive at the final position.
The ash hoppe
1.检查气缸
2.检查供气的管线
3.检查电磁阀
4.检查滑板是因为积料或大块卡住 1.Inspect the cylinder. 2. Inspect the air supply pipe line. 3.Inspect a solenoid valve. 4. Check whether a slide plate accumulates material or is blocked by big pieces.
灰斗滑动门卸灰系统滑动故障
r slide gate ash-unloading system slides with failure.
滑板不能运动。 The slide plate can not move.
1.检查供气的管线
2.检查密封是否太紧
3.检查滑板是因为积料或大块卡住 1.Inspect the air supply pipe line. 2. Check whether the sealing is too tight or not. 3. Check whether a slide plate accumulates material or is locked by big pieces.
3.5.4 电收尘器 Electrostatic Precipitator
3.5.4.1 设备规格、参数 Equipment Specifications and Parameters
编号 No.: 447EP1/448EP1
用途 Use: 窑头废气电收尘 Electric kiln outlet gas dust collection
型号 Model: 2×31/12.5/5×8/0.45 1/4(上进气,水平出气)(Upper air entry, horizontal air exit)
处理风量 Treated air volume: 1,100,000m3/h
废气温度 treated air temperature: 250(max450℃)
入口废气含尘浓度 Inlet gas dust ≤80g/Nm3
65 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
concentration:
出口废气含尘浓度 Outlet gas dust concentration:
≤20mg/Nm3
设计压力 Design pressure: -4000 Pa
设计阻力 Design resistance: ≤250 Pa
横断面积 Cross sectional area: 361 m2
电场风速 Electric field air speed: 0.85m/s
3.5.4.2 开停机顺序及注意事项 Startup or Closedown Sequence and Points for Attention
Startup sequence: Turn on the heater first, and then follow the sequential control to turn on the front output equipment; Send heated air for heating the electric field, and after the inner temperature of the electric field is higher than the dew point, send electricity to the electric field.
停机顺序:停止向电场供电,2 小时后,停振打装置,待物料送完按顺控次序停输送设备。
Closedown sequence: Stop power supply to the electric field. After 2 hours, stop a vibrating apparatus, and after materials have been sent, follow the sequential control order to stop a conveyer.
注意事项:Notes for Attention:
除紧急停运外,不论是第一次停运还是以后的正常停运,均应按以下要求进行。
Except for an emergency shutdown, either the first time’s shutdown or a later normal shutdown shall conform to the following requirements.
1) 确认工艺系统已允许电收尘器停运。
1) Make sure that the process system has already allowed an electrostatic precipitator (EP) to stop running.
2) 停止向电场供电。
2) Stop power supply to the electric field.
3) 切断主回路和控制回路的电源。
3) Cut off the power supply of the major loop and the control loop.
4) If the time for a shutdown is over 8 hours or an equipment overhaul is needed, you should cut over the isolating link to the position for the high-voltage outputs of the electric field and the transformer to be grounded, hang a warning sign on the changeover handle bar
66 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
of each electric control cabinet and each high-voltage isolating link, and take good care of the safety interlocking key.
5) After stopping power supply to the electric field, continue to run each rapping apparatus and ash conveyance apparatus for 2-4 hours to ensure that the dust inside the electric field and an ash hopper has been discharged thoroughly. The ash conveyance apparatus shall continue to run for 0.5 hour after the rapping apparatus stops running.
6) 如停机时间超过 24 小时,则在停止向电场供电的同时可切断电加热器电源。
6) If the shutdown time exceeds 24 hours, cut off the power supply to the electric heater at the time of stopping power supply to the electric field.
3.5.4.3 电收尘器的投运 Putting Electrostatic Precipitator into Operation
1) Within 4 hours in advance before an electrostatic precipitator is put into operation, send electricity and heat all electric heating apparatuses. Before the operation of a dust catcher, start and normally run all rapping apparatuses and their downstream ash conveyance and discharging apparatuses.
2) 电收尘器投运前应先通烟气加热电场,当电场内部温度高于烟气露点后才能向电场内送电。
2) Before the operation of an electrostatic precipitator, first send fumes to heat the electric field. Only after the inner temperature of the electric field is higher than the fume dew point will electricity be able to be sent into the electric field.
3) 确认全部的控制均已选择在自动。
3) Make sure that all the controls have already been selected at Automatic.
4) 确认全部的检查门或人孔门都已关闭。
4) Make sure that all the inspection doors or manhole doors have already been closed.
5) 按负载试运行的要求向电场供电,并观察一、二次电压、电流是否正常,电气设备有无异常现象。
5) As required by a load test run, supply power to the electric field, and observe whether the primary and secondary voltage, and current are normal, and whether the electric equipment has abnormal phenomena.
6) 观察各振打装置是否运行正常,各输灰装置、锁风装置是否运行正常。
6) Observe whether each rapping apparatus, ash conveyance apparatus and air locking apparatus run normally.
7) 观察工况参数是否正常,观察烟囱的排放情况是否达到要求。
67 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
7) Observe whether the operating condition parameters are normal and the emission circumstance of a stack has attained to a requirement or not.
8) The above various observations shall be carried out respectively in the control room and on the site. After operation, generally, you should observe the above various items continuously for half an hours. Only after making sure that all work well will you be able to enter a daily patrol checking procedure.
1) Strictly control the process parameters. Particularly, the fume temperature must be kept within in the contractual specification in order to prevent the inner parts from being deformed. If this circumstance is found, immediately adjust the process parameters and halt a machine for an overhaul to avoid the amplification or difficult restoration of an accident.
2) 检查全部的振打传动装置运转是否正常;
2) Check whether all the rapping and driving apparatuses run normally;
3) Check the high-voltage and low-voltage electric control apparatuses in the electric control room. It is particularly necessary to keep watch on the high-voltage electric control primary voltage and secondary voltage values, and current value. For any abnormality discovered, find out the cause for troubleshooting;
4) 检查输灰装置和锁风装置是否运行正常;electrostatic precipitator
4) Check whether an ash conveyance apparatus and air locking apparatus run normally;
5) 观察烟囱
5) Observe whether a stack discharges smoke normally.
3.5.4.5 停机后的维护保养 Maintenance and Upkeep after Shutdown
Before entering the electric field, take such safety measures as cutting off the high voltage power supply first, grounding the discharge electrode system of an electrostatic precipitator, putting up warning signs, unbolting the manhole doors to make sure that there is no dangerous gas inside, etc. The contents of the electric field internal inspection include:
1) 检查放电极和收尘极系统有无变形,极间距有无变化,放电极线是否松动或脱落,收尘极板
68 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
和放电极线上是否积有粉尘。
1) Check whether the discharge electrode and dust collecting electrode systems have been deformed, the interpole gap has changed, the discharging pole wire is loose or shed off, and the dust-collecting plate and discharging pole have accumulated dust.
2) Check whether the discharging pole and dust collecting rapping hammer axis systems are intact, the tension bar parts for discharging pole rapping are normal, the lifting angle of a lifting hammer is still the angle during installation, and the rotation is flexible.
3) 检查全部收尘极振打杆是否在一个平面上,全部振打杆的砧子是否仍在一条直线上。
3) Check whether all dust collection rapping bars are on the same plane surface and all the rapping bar anvils are still on a straight line.
4) Check whether the insides of a insulating sleeve and a dust-proof pipe have already accumulated dust, the positions of the wind shields on the top and on the two sides are normal, and the positions of the wind shields on the internal walking platform and the ash hopper baffle boards are normal.
5) 检查内部走台上部和灰斗内是否有严重的积灰。
5) Check whether the top of the internal walking platform and the inside of an ash hopper have serious accumulated ash.
6) Check whether a gas distribution board has been deformed or abraded, whether it has a shedding-off phenomenon or trend. In the same way of checking a discharging pole and dust-collecting pole system, check whether a gas distribution board rapping system is intact. At the same time, check whether a “catcher” between a driving gear and a rapping axis is at a normal position. Check whether there is accumulated ash or impeded ash unloading between the lower part of a distribution board and an air inlet bottom board.
7) Check whether the insulating sleeve of a top box girder has been damaged, an electric heater is intact, a thermostat is intact, a wall-piercing sleeve is intact, and a high-voltage wiring connection is firm. Check whether an insulating bar is intact, all the connections at the two ends of the insulating bar are firm, and the tap bolts are loose. Check whether the inside of a top box girder has accumulated ash.
69 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
8) Check whether a cable entrance box, cable terminal box, rectifier transformer, suppressor resistor, etc. are intact, and all the insulating parts have accumulated ash. Check whether all grounding is good.
9) Replace easily worn parts in time. If a dust-collecting pole and distribution board rapper, discharging pole rapper, all insulators, a gas distribution board, suppressor resistor, etc, have been damaged, replace them in time. Carry out in time the oiling and adjustment of equipment, the inspection and adjustment of various control and testing instruments, the inspection, testing and treatment of an earth electrode, the cleaning of an electric field inside, electric cabinet and insulating material, etc.
3.5.5 袋收尘器 Bag filter
3.5.5.1 设备规格、参数 Equipment Specifications and Parameters
编号 No. 427BF1/427BF1
用途 Use 旁路放风收尘Bypass dust collection
型号 Model LJP5046-2×5 处理风量 Treated air volume 900,000m3/h
过滤面积 Filtrating area 15200m2
过滤室数 Number of filtering chambers 2×5 个
滤袋规格 Filter bag specification Φ160x6000mm 入口浓度 Inlet concentration ≤60g/ Nm3
出口浓度 Outlet concentration ≤20mg/Nm3
阻力损失 Resistance loss ≤ 1700 Pa 压缩耗气量 Compressed air consumption 8 Nm3/min
压力 Pressure 0.3 MPa
3.5.5.2 开停机顺序及注意事项 Startup Sequence and Points for Attention
开机顺序: 先启动刚性叶轮给料机、拉链机,再启动脉冲喷吹装置。
停机顺序: 开机顺序的逆过程;
Startup sequence: First start the rigid rotary feeder and chain conveyance, and then start the pulse injecting device.
Shutdown sequence: reverse process of the Startup sequence;
注意事项:Points for Attention:
70 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
1) 排风机停后应继续让收尘器输灰系统工作一段时间;
1) After an exhaust fan is shut down, continue to let the dust catcher ash conveyance system operate for a period of time;
2) 经常检查气压、脉冲喷吹装置、差压,避免袋子堵塞。
2) Often check air pressure, a pulse injecting device and differential pressure to avoid bag blockage.
3.5.5.3 开机前的准备Preparations before Startup
1) 检查滤袋是否完好,如有损坏应及时更换、糊袋应及时清理;
1) Check whether a filter bag is intact. If there is damage, replace the bag in time, and a pasty bag shall be tidied up in time;
2) 检查油雾器内是否有油;
2) Check whether there is oil inside an atomized lubricator;
3) 放出气水分离器内的水;
3) Discharge the water in air-water separator;
4) 检查袋收尘入口阀门是否打开并调整到适当位置;
4) Check whether a bag dust-collecting inlet valve has been unbolted and adjusted to an appropriate position;
5) 检查人孔门是否密封好;
5) Check whether a manhole door has been well sealed;
6) 检查各螺栓是否松动、脱落;
6) Check whether each bolt is loose or shed off;
7) 检查是否有足够压力的压缩空气。
7) Check whether the compressed air has enough pressure.
3.5.5.4 运转中的检查 Inspection during Operation
1) 检查压缩空气压力是否正常,根据出口气体含尘浓度判断布袋有无损坏;
1) Check whether the compressed air pressure is normal, and according to the outlet gas dust concentration, judge whether a cloth bag has been damaged;
2) 根据系统负荷状况调整挡板开度;
2) Adjust the span of a baffle according to the system loading condition;
3) 及时放空气、水分离器内的水;
3) Empty an air-water separator of water in time;
71 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
4) 根据润滑卡片添加油雾器内的油;
4) Add oil to an atomized lubricator according to a lubrication card;
5) 根据声音判断各阀工作情况,根据压差情况调整脉冲周期;
5) Judge the working condition of each valve according to sound, and according to differential pressure circumstance, adjust a pulse period;
6) 检查盖板是否盖严,系统是否漏风、灰斗是否积灰;
6) Check whether a cover plate is closely sealed, the system leaks air and an ash hopper has accumulated ash;
3.5.5.5 停机后的维护保养 Maintenance and Upkeep after Shutdown
1) 检查滤袋是否正常,糊袋、破袋及时调整、更换;
1) Check whether a filter bag is normal. A pasty or damaged bag shall be adjusted or replaced in time;
2) 提升阀密封情况,灰斗是否积灰,盖板是否变形;
2) Check the sealing circumstance of a lifting valve, and check whether an ash hopper has accumulated ash and a cover plate has been deformed;
3) 差压取样管是否堵塞,袋笼是否完好;
3) Check a differential pressure sampling pipe is blocked and a bag cage is intact;
4) 检查各螺栓是否松动、脱落,并及时紧固、更换。
4) Check whether each bolt is loose or shed off, and tighten or replace it in time.
3.5.6.6 袋收尘常见故障处理及处理 Constant Fault and Treatment for Bag Filter
1) 排出气体含尘量超标
原 因:滤袋破损;粉尘输送设备堵塞
处理方法:更换滤袋;检查恢复粉尘输送设备;
1) The dust content of a discharged gas exceeds a standard.
Cause: A filter bag is worn out; a dust conveyer is blocked.
Treatment process: Replace the filter bag; Inspect and restore the dust conveyer;
2) 排气量减少
原 因:糊袋;收尘管道堵塞
处理方法:检查高压气体压力是否正常,脉冲反吹装置、差压是否正常;检查收尘管道。
2) The air displacement is reduced.
Cause: A bag is pasted; a dust collecting pipeline is blocked.
72 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
Treatment process: Check whether the high-pressure gas pressure is normal, and whether a pulse back blowing apparatus and differential pressure are normal; inspect a dust collecting pipeline.
4.系统启动前的准备工作 Preparatory Work before System Startup
Before startup, all the equipment of the system shall be earnestly inspected, repaired, maintained and adjusted. Not only at the trial production stage, but also in later normal production, it is also necessary to follow this production operating procedure so as to ensure the safety, stability and long-term normal operation of each set of equipment and the whole system.
Before the system startup, the bypass system is not put into operation, so the system shall be isolated from the kiln system.
4.1 操作前的准备工作Preparatory Work before Operation
(1) 在所有应该润滑的部位,按规定量、规定品位加足润滑油,并确认不漏油。
(1) To all parts that should be lubricated and the by a specified quantity and variety, add enough lub oil, and make sure that no oil is leaked.
(2) 清除各油路系统中的一切污垢,保证管路畅通。
(2) Clear away the dirt in each oil route system and ensure that a pipe line is unimpeded.
(3) 检查并清除设备内的一切杂物 ,关闭好检查门、清扫孔等。
(3) Inspect and clear away all the dopants inside the equipment and close an inspection door, cleaning hole, etc.
(4) 拆除膨胀节的保护连杆,检查风管连接及保温情况是否良好,管道密封是否严密。
(4) Remove the protective connecting lever of an expansion joint, and check whether the air duct connection and thermal insulation circumstances are good or not and whether the pipeline sealing is tight or not.
(5) 检查所有设备状况良好,防护安全措施切实可靠。
(5) Make sure that all equipment conditions are good and the protective safety measures are actually dependable.
(6) 给水、排水、供气等有效无误,能满足设备或系统运行时的操作要求。
(6) Make sure that the water supply, water drainage, gas supply, etc. are available and without any error, and can satisfy the operating requirements of the running of the
73 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(7) Check whether the measuring elements, control and adjusting meters, interlocking and signal apparatuses are intact, whether their corresponding is consistent and installation is correct, and whether the switches on a control panel and on the site are flexible.
(8) For the situations such as equipment patrol checking, a working platform stairway, emergency treatment, earnest cleanup and dopant sweeping shall be carried out. At the same time, it is also necessary to check whether such labor protection facilities as the baffles, rails, warning signs, etc. are installed properly.
(9) For such circumstances as parts damage, equipment abnormality, the blockage of water and gas supply, etc, it is necessary to carry out repair in time, and make sure that they can completely be put into normal operation immediately.
(10) Heatproof clothes, masks, overhaul tools, illumination appliances, etc, shall be well-found, and all production auxiliary materials shall be ample so as to ensure that they can be taken for use at any time.
4.2 确认事项 Matters Need to be Confirmed
(1) 确认与本烧成系统相关的其它生产车间操作前的准备工作一切就绪。
(1) Make sure that the preparatory work before operation in other workshops related to this burning system is ready.
(2) 确认传动机构、设备旋转运行方向与工艺要求无误。
(2) Make sure that a driving mechanism and the revolving and running directions of equipment are consistent with the process requirements without any error.
(3) 确认各种阀门、闸板等的操作位置与状态显示正确对应。
(3) Make sure that the operating positions of various valves, flash boards, etc. correctly correspond with their status displays.
(4) The single machine performance requirements of the equipment shall conform to
74 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
its manual for debugging acceptance. After the trial run, make sure that the main monitoring parameters such as vibration, bearing temperature, etc. are not abnormal, and the equipment performance attains to the nameplate or production requirements.
(5) 所有现场的自控元件和仪表等完好可靠,并能与中控室的显示一一对应,反应灵敏、准确。
(5) All site automatic control components, meters, etc, shall be intact and reliable, and shall correspond with the displays in the central control room one by one, with sensitive and accurate responses.
(6) 系统每一机组连动、联锁,模拟各种故障停车、报警保护等检验均有效可靠。
(6) The inspection of the linkage, interlocking, shutdown simulating various faults, alarm protection, etc. for the system’s each machine shall be effective and dependable.
(7) 确认中央控制和机旁控制均可进行正常的开停操作,并能快速、有效、灵活地处理异常事故。
(7) Make sure that the central control and machine-side control can be turned on and off normally, and can treat an accident fast, availably and flexibly.
(8) 中控室、各车间、各岗位之间的通讯设施完备、联络畅通。
(8) The telecommunications facilities between the central control room, each workshop and each post shall be complete, with unimpeded handshaking.
(9) 确认 417DA3,DA4,DA5/418DA3,DA4,DA5 处于关闭状态。
(9) Make sure that 417 DA3, DA4, DA5/418 DA3, DA4 and the DA5 are placed in off position.
4.3 系统耐火材料的烘干 Drying of the System’s Refractory Materials
After the laying of the refractory materials for the burning system or before operation with lowering of charge, there is a process of temperature rise for drying to avoid direct ignition to the kiln and too quick temperature rise, which make firebricks, poured charge and brickwork joint puddle suddenly heated to cracks and come off by layer, influencing the life of the internal lining, so after the no-load trial operation of the equipment or after the system has been stopped for the overhaul and replacement of the internal lining, setting about the drying of the system’s refractory materials is very indispensable.
4.3.1衬料烘干前的准备 Preparations before Drying Lining Materials
在遵循上述 4.1 节和 4.2 节有关内容的同时,还应做好以下准备工作:
75 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
At the time of observing the relevant contents of the above-mentioned Sections 4.1 and 4.2, it is also necessary to complete the following preparatory work:
(1) After the installation of all the equipment of the burning system , the no-load operation of a single machine for continuous 48 hours shall be examined. During this process, the controlling, measuring, adjusting and interlocking protective devices, etc. shall also be examined. If the system is stopped for the routine overhaul and replacement of the internal lining, then after the lining work is terminated, the no-load operation of a single machine lasting for a suitable time shall also be examined.
(2) 全面检查、排除旋风筒、分解炉、回转窑、冷却机内的一切杂物,管道畅通无堵。
(2) Overall inspect and clear the cyclone, precalciner, rotary kiln and cooler of all dopants, and the pipeline shall be unimpeded without blockage.
(3) Check whether a refractory material conforms to the design requirements in construction and installation. It is necessary to note whether the thermal expansion seams of the kiln and the smoke flue have been built well, and the ceiling bricks inside the cyclone and the cooler have been hung firmly.
(4) 打开系统中的烘干排气孔,关闭旋风预热器和分解炉所有的人孔门、清扫孔等。
(4) Open the drying air discharge holes in the system, and close all manhole doors, cleaning holes, etc, of the cyclone preheater and precalciner.
(5) 打开各级旋风筒的下料翻板阀,并用铅丝固定处于常开状态。
(5) Unbolt the discharging flap valves of all- stage cyclones and use lead wire to fix the valves to make them normally open.
(6) 关闭至原料磨管道上的热风阀,使烧成系统不受外界因素干扰。
(6) Close the hot air valves to the raw mill pipeline to make the burning system free from outside interference.
(7) The relevant equipment to be involved in other related systems shall be got ready for operation at any time. For example, the electric heating in advance inside the electric field of a kiln outlet electric dust catcher shall be got ready.
(8) 确认中控室、各系统、各岗位之间的通讯联络畅通。
76 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(8) Make sure that the telecommunications handshaking between the central room, each system and each post is unimpeded.
(9) 根据衬料材质、砌筑厚度、含水量、砌筑方法等实际情况,制定出切实可行的升温烘干方案。
(9) Draw up an actually viable temperature rise drying scheme according to the actual quality, laying thickness, water content, laying method, etc. of a lining material.
(10) 燃料油或天然气准备足够。
(10) The reserves of fuel oil or natural gas shall be enough.
4.3.2预热器和回转窑耐火材料的烘干操作要求 Drying Operation Requirements for Preheater and Rotary Kiln Refractory Materials
(1) Adjust the spans of the air relief valves(417 DA1, DA2/418 DA1, DA2) of the Class-1 cyclone air outlet conduits to control the kiln inlet negative pressure at about-50~-100Pa.If the control encounters difficulty or the system’s internal draft is scarce, you may also directly start the induced draft fans (327 FN1, FN2/328 FN1, FN2) in front of a bag filter and adjust the spans of the valves(327 LDD, LDE/327 LDD, LDE) to control the kiln inlet negative pressure.
(4) According to the requirements of the actually established kiln drying temperature rise curves, opportunely adjust an oil injection quantity (or natural gas quantity) and ventilation quantity inside the kiln, and keep a good burning condition. It is suggested that the temperature rise rate be not higher than 30 ℃/h, in order to prevent a refractory material from cracking and coming off.
(6) After ignition for combustion, you may slowly adjust an oil (natural gas) injection quantity, and then go on heating to raise temperature, but you must remember that the adjusted quantity each time will not make the temperature change dramatically. Besides, it is hoped that in kiln drying operation, the flame will be stabilized to prevent the burning zone from being overheated or local high temperature. Generally, control the kiln lining temperature at not more than 1,000 ℃, and the kiln body temperature at less than 300 ℃.
(7) Opportunely adjust the ventilation quantity of the system to control and keep the corresponding suitable temperature of the preheater and each part inside the rotary kiln. If the kiln inlet temperature excessively high but the Class-1 cyclone outlet temperature is on the low side, you may appropriately enlarge the ventilation quantity. If the kiln inlet temperature is on the low side but the Class-1 cyclone outlet temperature is one the high side, you may turn down the ventilation quantity appropriately for adjustment, and you may also appropriately open the tertiary air duct high temperature regulating valve when it's necessary. Note that in the process of the above-mentioned adjustment of a ventilation quantity, you must keep the stability and the good burning condition of the flame.
(8) When the kiln outlet’s incoming air volume is scarce, you may start the cooling fan behind of the cooler KIDS 1# part, and at the same time, close the manhole doors of the kiln outlet hood and the cooler. Moreover, you may also enlarge the span of a primary air valve. When the cooling fan air flow is oversize, you may also start the induced draft fan of the clinker EP and alter the span of a valve in front of the fan control the kiln outlet negative pressure at -20~-50Pa.
(9) 在整个升温烘干过程中,应根据窑尾温度,用辅助传动慢转窑,大体要求如下:
(9) In the whole process of temperature rise for drying, you should use auxiliary drive to slowly rotate the kiln according to the kiln inlet temperature. The general requirements are as follows:
78 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
窑尾温度(℃)
Kiln inlet temperature
转窑量(圈)
Revolution of kiln
旋转间隔时间(分)
Revolving time interval
(min)
Below 100 以下 0 不慢转 No slow rotation
100~250 1/4 60
250~450 1/4 30
450~650 1/4 10~15
Above 650 以上 1 连续慢转 Continuous slow rotation
注意:天气下雨时应根据实际情况相应地缩短慢转时间间隔。
Note: While it is raining, you should correspondingly shorten a slow rotation time interval according to an actual circumstance.
(10) When Class-1 cyclone outlet temperature attains to about 300 ℃, it is necessary to make this temperature sustain a time not less than 24 hours so as to make the moisture in the system’s inside lining be able to fully evaporate. For a kiln that has undergone production, its heat insulation time shall not be too long.
(11) At the front stage of kiln drying and when the kiln inlet temperature is lower than 250 ℃, you may unbolt the bypass system’s valves 417 DA3, DA6/418 DA3, DA6 so as to help dry the refractory material in the bypass apparatus.417 DA4, DA5/418 DA4, DA5 shall be closed. When the kiln inlet temperature is more than 250 ℃, you should close 417 DA3, DA6/418 DA3, DA6 so as to isolate the bypass system and from the kiln system.
(12) When the Class-1 cyclone outlet temperature attains to about 300℃ and if the
79 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
temperature has been kept for more than 24 hours, generally, you may carry out operation with lowering of charge immediately, on one hand, being able to make full use of the drying heat storage in the system and reducing fuel dissipation, and on the other hand, being able to make the inside lining not experience stress loss due to the change from cold to heat or from heat to cold and shorten the kiln drying time from ignition to the lowering of charge. But if it is necessary to inspect the inside lining after drying, you may can step by step reduce fuel supply until flameout. Adjust the system’s ventilation quantity to try hard to make the inside lining turn cold slowly and gradually. Never attempt to give sudden cold. After the complete cooling, enter the preheater and rotary kiln to overall and earnestly check the circumstance of the inside lining. If it is found that the lining bricks have large-scale flaking and cracks whose depth of 1/3 of the thickness of a firebricks, replacement shall be considered. During repairing bricks, take care not to make the dried inside lining affected with damp again. A replaced part need not be dried alone again, and it may be dried with the normal ignition operation later. Appropriately lengthening the kiln drying time shall be considered.
(13) The above-mentioned method has certain compatibility for the later major or medium overhaul, replacement, and re-drying of the system’s refractory materials. As the operating requirements do not completely fit together with the actual circumstances one by one, you may acquire experience for appropriate trimming according to site operation or the first-time ignition.
4.3.3 三次风管耐火材料的烘干 Drying of Refractory Materials of Tertiary Air Duct
三次风管耐火材料的烘干可采用两种方案:一是辅助烘干,二是单独烘干。
For the drying of a tertiary air duct refractory material, two schemes can be adopted. One is auxiliary drying, and the other is independent drying.
Auxiliary drying is extracting the hot air of cooled clinker from the kiln outlet hood for drying, with the condition that after the drying of a preheater and the kiln, lowering of charge has to be operated with low output. This drying mode has a longer drying period, and its operating time of low kiln output is long. Its merit is that it can ensure that a tertiary air duct can be dried as far as possible, and the temperature changes slowly, and that drying does not need to increase heat sources, and it can be used together with the drying of cooling fan refractory materials.
(1) 预热器及窑耐火材料烘干后,继续升温到投料状态,稳定后开始逐步增加投料。
80 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(1) After the drying of a preheater and kiln refractory material, go on to raise temperature the status for lowering of charge. After being stabilized, start to increase lowering of charge gradually.
(2) The kiln shall be operated at low output. After being balanced and stabilized, adjust a tertiary air duct gate valve, gradually enlarge the kiln outlet hood tertiary air ventilation quantity and control the temperature of the tertiary air entering the precalciner.
(3) When the tertiary air temperature is 500 ℃, keep it for a period of time in order to make the moisture in the inside lining be able to evaporate well. Then go on to raise the temperature to more than 600 ℃.
(4) Gradually increase the quantity of raw meal entering the precalciner, closely monitor the temperature change inside the furnace and adjust the span of a tertiary air duct hot air valve, coal feeding amount and raw meal quantity at any time.
(5) 不断增加燃料量、喂料量,保证风、燃料、料的良好配合,达到正常操作。
(5) Continuously increase an amount of fuel and feeding quantity, and ensure that the good proportions of air, fuel and charge satisfy normal operation.
5.3.3.2 单独烘干 Independent Drying
此种烘干方法适宜于三次风管内耐火材料水分偏高的场合,随之带来的麻烦是要增加烘干热源。
This drying method is suitable for the situation in which the refractory material moisture is on the high side inside a tertiary air duct, but the trouble brought immediately is to increase drying heat sources.
(1) 在窑头罩中适当位置架设一个钢架或冷却机篦床上铺设冷熟料后,铺适量干燥木柴,浇少量柴油。
(1) Spread an appropriate amount of dry firewood and sprinkle a little amount of diesel oil after at an appropriate position of the kiln outlet hood install a steel frame or laying cold clinker on the grate bed of a cooler.
(2) 依靠系统内抽力或窑尾高温风机来控制三次风管内的通风量。
(2) Rely on the system’s internal draft or the kiln inlet high-temperature fan to control the ventilation quantity of a tertiary air duct.
(3) 点燃木柴,并不断从窑头罩人孔门或冷却机人孔门增添木柴,旺火直至三次风管内耐
81 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
火材料烘干。如温度偏低,则适当延长恒温时间。
(3) Light the firewood, add firewood continuously from a kiln outlet hood manhole door or cooler manhole door, and keep the vigorous fire until drying the refractory material inside an air duct. If the temperature is on the low side, then appropriately lengthen the time of the constant temperature.
(4) 烘干后熄灭热源,控制三次风管内通风量至最低值,切记保温渐冷。
(4) After drying, put out a heat source, control the ventilation quantity inside a tertiary air duct to the minimum value and have to remember thermal insulation and gradual cold.
(5) 完全冷却后清理灰渣,全面检查烘干后衬砖的情况,如耐火砖崩裂剥落严重应考虑重新更换。
(5) After complete cooling, clear away ash dirt and overall inspect the lining bricks after being dried. If the cracking and peeling off of the firebricks are severe, replacement shall be considered.
4.3.4 篦式冷却机耐火材料的烘干 Drying of Refractory Materials of Grate Cooler
For the drying of a grate cooler refractory material, you may make use of the clinker heat transfer by radiation and do not need to carry out independent drying, so no special drying apparatus will be set up. But for the drying operation, you should overall consider the running circumstance of the burning system .
(1) 尽可能采用长时间自然通风干燥。
(1) Adopt long-playing natural draft drying as far as possible.
(2) In order to prevent the temperature of a cooler refractory material from increasing suddenly, the low-output operation of the kiln shall not be less than 48 hours. During operation, simultaneously give consideration to the ancillary drying of a tertiary air duct refractory material.
(3) If the operation load of the kiln is high at the early stage of lowering of charge, you may also adopt the operating methods of quickening a pushing speed and enlarging air supply so as to slow down a drying speed.
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(4) If before operation, it is necessary to compulsorily dry a cooler refractory material, you may also adopt the method of burning firewood on the gate bed, but you will have to spread cold clinker or firebricks on the grate bed in advance so as to prevent local overheating from resulting in grate plate deformation.
4.3.5 衬料烘干操作的注意事项 Points for Attention of Lining Material Drying Operation
(1) 稳定燃烧的火焰,火焰长、细,完全燃烧。
(1) Stabilize the flame, and the flame shall be long and thin, with complete combustion.
(2) 防止烧成带耐火材料经受急剧的局部过热。
(2) Prevent a burning zone refractory material from experiencing sharp local overheating.
(3) 防止由于窑筒体不均匀受热变形及热膨胀,造成对支承装置不良影响。
(3) Prevent the kiln cylinder from deformation and thermal expansion because of the kiln body being subjected to uneven heating, which cause bad impacts on a supporting apparatus.
(4) 随时注意监控窑筒体、窑尾及一级旋风筒出口的温度。
(4) Monitor the temperatures of the kiln body, the kiln inlet and the Class-1 cyclone outlet at any time.
(5) 密切监测窑托轮、液压挡轮、减速机等的轴承润滑状况和轴承温度。
(5) Closely monitor the bearing lubrication condition and bearing temperature of a kiln supporting roller, hydraulic thrust roller, speed reduction unit, etc.
(6) 系统升温情况不得较大地偏离拟定的烘干升温曲线要求,并注意适时慢转窑。
(6) The system’s temperature rise shall not considerably deviate from the determined requirements of the drying temperature rise curves, and take care to slow down the kiln in good time.
(7) During a process of drying, you must note that the amplitudes of accommodation of an oil(natural gas)injection quantity and the spans of various throttles shall not be oversize in order to prevent overheating and overloading from damaging the inside lining or the equipment.
(8) During kiln drying, remember that as the temperature inside the kiln and the secondary air temperature is lower and the fuel calcinating status is unstable, having the hazards of deflagration or sudden extinguishment. It is necessary to pay attention to safety.
83 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
5.投料试生产 Commissioning with Lowering of Charge
5.1第一次投料运转 First operation with Lowering of charge
If after the drying of a burning system ’s refractory material ends, it is certainly unnecessary to put out the flame for an internal check, generally, operation with lowering of charge shall be carried out immediately. During operation, you should have a steady and progressive attitude, make full preparations, should not be too nervous to operate boldly, work hard for grabbing an opportune moment, realize stable calcination quickly, hang the kiln skin well and raise the output. Experience proves that if the precalcining kiln outside has too low an output, a process fault is easily led to, while if the output is high, it will be advantageous to stable operation, so you should smash conventions. If there is no equipment failure, you should contend for stably breaking through the "dead zone of operation". Normal production shall be basically reached in 3-5 days after the first ignition and lowering of charge.
5.1.1投料前的进一步确认工作 Further Confirmation before feeding
(1) 记录烘干后耐火材料的情况。
(1) Record the circumstances of a refractory material after being dried.
(2) 确认检查门、人孔门、清扫门等全部关闭。
(2) Make sure that all the inspection doors, manhole doors, cleaning doors, etc. have been closed.
(3) 确认各级旋风筒锥部吹堵的压缩空气管路畅通。
(3) Make sure that the compressed air pipe line of the conic sections of all-level cyclones are unimpeded.
(5) Inspect the temperature of each part of the system. Within one hour before lowering of charge, remove the fixed iron wires on the discharging flap valves of all-level cyclones and make good adjustment.
(6) 确信系统所有机电设备、各种计测仪表能够正常连续工作。
(6) Make sure that the system’s all electromechanical equipment and various meters can work continuously and normally.
(7) 核实油库中的油(或天然气来源)、均化库中生料能满足生产初期的要求储量。
(7) Make sure that the oil(or natural gas source) in the bulk plant and the raw meal in
84 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
the homogenizing storage can satisfy the demanded reserves at the initial stage of production.
(8) 选择好熟料输送线路并确信链斗输送机能长期正常运行。
(8) Select a correct clinker conveyance route and make sure that a chain bucket conveyor can run for a long time and normally.
(9) If before drying the kiln, an operation with lowering of charge is planed and prepared, it will be best that the KIDS 1# part of a cooler will be covered with broken firebrick or cold clinker with thickness of 20~30 mm to prevent the high-temperature radiant heat of drying the kiln from damaging a grate plate nozzle.
(10) 原料粉磨与废气处理、生料均化与入窑等其它相关车间应做好随时负载运行的准备、通讯联络顺畅。
(10) The raw mill and waste gas treatment, raw meal homogenization and kiln feeding, and other related workshop shall be got ready for load running at any time, and their telecommunications handshaking shall be smooth.
(11) 准备好各种清理、捅料、检修、安全防护等设施与设备,保证能随时取用。
(11) Get ready various facilities and equipment for cleanup, charge-poking, overhauling, safety protection, etc. and ensure that they can be taken for use at any time.
(12) 旁路放风系统已与窑系统隔离。
(12) Make sure that the bypass system has been isolated from the kiln system.
5.1.2投料操作 Operation of Feeding
5.1.2.1 开始喂料 Beginning Feeding
(1) 增加窑头喂油(天然气)量,按照点火升温曲线继续升温。
(1) Increase the kiln outlet oil(natural gas)feeding quantity and go on to raise temperature according to the ignition-temperature rise curves.
(2) Follow the startup sequence to start each fan of a cooler, clinker EP induced draft fans and other equipment. Note that the corresponding damper shall be closed before the startup of a fan.
(3) 调节系统通风量及窑头燃烧器燃烧的一、二次风量,监测系统各部位的温度和压力。
(3) Adjust the system’s ventilation quantity and the primary and secondary air volumes of the kiln outlet burner and monitor the temperature and pressure of each part of the system.
85 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(4) 控制窑尾温度 950~1000℃ ,一级旋风筒出口温度 360~400℃时开始投料。
(4) Control the kiln inlet temperature at 950-1000 ℃. When the class-1 cyclone outlet temperature is 360-400 ℃, start feeding.
(5) 开始以总喂料量的 20~30%喂料。
(5) To begin with, feed 20-30% of the total feeding capacity.
(6) After the feeding for the system, change the ancillary drive of the kiln into main drive and assume the scheme of rotating the kiln at an idle speed to prevent a great deal of raw meal from swarming into the burning zone. Possibly ensure that the first batch of charge will be burned to prevent incomplete calcination from resulting in rising dust, which lowers the range of visibility inside the kiln and brings difficulty to the operating observation of the condition inside the kiln and further charge. At the early stage of feeding, the burning heat loss is about 1100-1300 kcal/kg.cl.
(7) 密切观察窑内状况,注意窑尾,一级旋风筒出口的温度和压力,随时调节风、燃料、料的匹配。
(7) Closely watch the condition inside the kiln. Note the temperature and pressure of the kiln inlet and the Class-1 cyclone outlet, and adjust the matching of air, fuel and charge at any time.
(1) According to the circumstances inside the kiln and the preheater, speed up the kiln by degrees, and correspondingly and gradually feed about 50% of the designed capacity. The fuel quantity shall be increased by degrees with the feeding quantity, and the operation of adding oil(natural gas) shall be slow-moving and stabilized.
(2) 加料幅度不宜大,可控制≤40t/h,每次加料为 5~10 t 左右。
(2) The charge span shall not be big, and it may be controlled at ≤ 40 t/h. The charge each time shall be about 5~10 t.
(3) In the charging process, the kiln inlet temperature shall be controlled at 950-1100 ℃, and the Class-1 cyclone outlet temperature, at 320-380 ℃.If the kiln inlet temperature is lower than 950 ℃, you should decelerate or stop charge.
(4) 根据加料量、加燃料量及系统温度、压力的变化,及时调整风量。在此期间,应注意
86 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(4) According to a charge quantity, fuel quantity and the system’s temperature and pressure change, adjust an air volume in time. During this period, you should note the temperature and pressure change of each part of the system and not break the stability inside the kiln. At the same time, rigorously note the movements of all- stage cyclone discharging flap valves, intensify patrol inspection, and for a discovered blockage circumstance, handle it resolutely and in time.
(5) 调整火焰活泼有力,明亮完整,不冲刷耐火砖或窑皮,初次投料开始到挂窑皮结束约需 48 小时。
(5) Adjust flame to alacrity, vitality, brilliancy and integrity. Do not scour the firebricks or the kiln skin. It takes about 48 hours from the first lowering of charge to the completion of hanging the kiln skin.
(6) 在分解炉未投入运行时,窑运行时的喂料量控制不能超过设计能力的 50%。但应该尽快过渡。
(6) Before the precalciner is put into operation, the feeding capacity during the running of the kiln shall be controlled at not more than 50% of the designed capacity. But the transition shall be done as soon as possible.
(1) The operation of a cooler shall conform to the IKN run book. At the stage of the kiln being heated, it shall be noted that if the temperature of a grate plate nozzle rises to 80 ℃, you should start a fan and make it run at the lowest flow rate.
(2) When the clinker inside the kiln starts to be unloaded to the grate bed and when the clinker at the KIDS 1# part has been piled up to 1.5m, you should start 3 cooling fans at the KIDS 1# part.
(3) The flow control of a cooling fan at the KIDS 1# part shall conform to the curves of discharge that IKN has provided or to the requirements that the IKN debugging engineers have designated.
(4) 如果熟料被吹离 KIDS 表面,应减少风机的供风量,保持住熟料在 KIDS1#上的斜坡。
(4) If the clinker is blown off the KIDS surface, you should slash a fan air volume and keep the clinker slope on KIDS1#.
87 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(5) Note that the adjustment of a grate bed pushing speed, fan and air cannon shall be appropriate, making the clinker layer able to cover the grate plate of the KIDS 1# part so as not to burn down the grate plate.
(6) 在开始阶段,如果需减小 KIDS1#部分的料堆高度,可加快 1 段篦床的推动速度。
(6) If at the beginning stage, it is necessary to reduce the height of the charge at the KIDS1# part, you may speed up the pushing speed of section 1 of the grate bed.
(7) While the kiln is continuously outputting clinker, the adjustment of a grate speed shall conform to the requirements that IKN has drawn up or to those an IKN debugging engineer gives on site.
(8) 为保证最优化的篦冷机操作,每次只能调整一个参数,等待结果,这样窑和冷却机的操作才能稳定。
(8) In order to ensure the optimized operation of a grate cooler, you may only adjust one parameter each time and wait for a result so that the operation of the kiln and the cooler will be stabilized.
(9) At the time of charging and adding fuel, enlarge the air volume of each room by degrees. The general principles are as follows:
Cooler air-increasing sequence: High-temperature zone first, low-temperature later;
Cooler air-decreasing sequence: low temperature zone first, high-temperature later;
At the initial stage of feeding, a high-temperature zone fan air cock shall be a little big relatively, and a low-temperature zone fan air cock shall be a little small relatively. An air cock shall also be adjusted together with a clinker EP induced draft fan according to the kiln outlet hood negative pressure -20~-50Pa.
(10) Clinker shall be evenly spread out and keep certain thickness. According to the brightness of the clinker on the grate bed, the distribution of clinker, and the data
88 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
and the air volume requirements for the kiln and precalciner recommended by IKN, adjust the air volume of each air chamber so as to raise the secondary and tertiary air temperatures as far as possible and to prevent an excessive air volume from blowing through a charge layer and from causing a short circuit.
(11) When the output of the kiln attains to a normal index, check the cooler outlet clinker temperature and depend on this to adjust a cooling air volume. When the general cooling air volume runs over the demands of the kiln and the precalciner, discharge the redundant gas on the basis of the grate cooler Vent air fan controlling the kiln outlet hood pressure .
(12) 当冷却机废气温度超过 300℃时,可打开冷风阀掺冷风,并根据温度调节阀门开度。
(12) When the cooler waste gas temperature exceeds 300 ℃, you may unbolt a cold air valve to vent cold air and adjust the span of the valve according to the temperature.
5.1.2.4分解炉投料运行 Precalciner Operation after Feeding
在稳定运行 2~4 小时后,一般可进行分解炉的燃烧器的启动操作。
Generally, you may carry out the startup operation of a precalciner burner after stabilized operation for 2-4 hours.
(1) Note that the temperature of the hot air entering the precalciner shall attain to over 600 ℃. If the temperature is on the low side, you may adjust the operation of a cooler and make the tertiary air temperature exceed 600 ℃ as far as possible.
(2) Start the precalciner burner system, ensure the normal combustion of the oil (natural gas) inside precalciner, further and slowly increase the span of a tertiary air duct hot air valve and raise tertiary air volumes.
(3) 逐步加大喂料量,严密监视炉内的温度变化。
(3) Gradually enlarge the feeding quantity and closely monitor the temperature change in furnace.
(4) 窑喂料量增加 300~350t/h 左右。
(4) The kiln feeding quantity shall be increased to about 300-350 t/h.
(5) 逐渐增加窑速,最终为 3~3.5r/min 之间。
(5) Increase the kiln speed by degrees, and its final speed shall be 3-3.5 r/min.
89 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(6) Increase the air discharge volume of the burning system and finally, cause the Class-1 cyclone outlet negative pressure to be about 5000-5800 Pa, CO to be below 0.5% and O2 to be about 3.5%.
(7) Adjust the ratio of the oil (natural gas) injection of the kiln to the precalciner, increase oil(natural gas) injection quantity of the precalciner and finally, cause the heat loss to be 730 Kcal/kg.cl, The fuel consumption ratio of the kiln to the precalciner shall be:
Kiln﹕Precalciner=35-40 ﹕ 60-65
(8) 根据综合判断、及时加料加油(天然气),最终窑喂料量加料至 680~710t/h。
(8) Add charge and oil (natural gas) in time according to comprehensive judgment. The final kiln feeding quantity shall go to 680-710 t/h.
(9) At the time of charging, increase the air discharge volume of the system and the air volume of each chamber of a cooler, increase the cooler grate bed speed and adjust a tertiary air duct hot air valve to an optimum condition.
(10) As during a process of feeding for the precalciner, the general feeding quantity is significantly increased and the operating conditions inside the kiln changes considerably, in operation, you should closely note the system temperature, the kiln load current, the kiln inlet and precalciner pressure changes, closely observe the condition inside the kiln and adjust various parameters in time. The adjustment range of a charging quantity, fuel quantity or air discharge volume shall not be oversize. Handle well the balance of air, fuel, charge and a kiln speed and stabilize the system’s hot engineering system.
(11) 烧成系统各部位的主要操作参数大体如下:
一级旋风筒出口温度: 290~350℃
一级旋风筒出口O2含量: 3%左右
一级旋风筒出口 CO 含量: <0.2%
90 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
分解炉内温度: 850~900℃
窑尾温度: 1050~1150℃
窑尾O2含量: 1.0~2.0%
烧成带温度: 1350~1500℃
窑头罩负压: -20~-50Pa
二次风温度: >950℃
三次风温度: >860℃
烧成带的窑筒体温度: 250~400℃(视筒体冷却风机的开停而定)
(11) Generally, the main operation parameters for each part of the burning system are as follows:
* Class-1 cyclone outlet temperature: 290-350 ℃
* Class-1 cyclone outlet O2 content: 3% or so
* Class-1 cyclone outlet CO content: <0.2%
* Temperature inside the precalciner: 850-900 ℃
* Kiln inlet temperature: 1050-1150 ℃
* Kiln inlet O2 content: 1.0-2.0%
* Burning zone temperature: 1350-1500 ℃
* Kiln outlet negative pressure: -20~-50Pa
* Secondary air temperature: >950 ℃
* Tertiary air temperature: >860 ℃
Kiln body temperature of burning zone: 250-400 ℃(depending on the startup and shutdown of a kiln body cooling fan)
(12) After the system’s thermal regulation has been stabilized and after making sure that various meters and electromechanical equipment are normal, automatic control operations (including cooler "ternary" control, feeding bin charge level control, kiln outlet negative pressure control, etc.) with central control loops may be put into use.
(13) After the system operation is completely normal, determine when to put the bypass system according to the detection circumstance of kiln inlet hot charge chlorine ions or according to the owner’s production experience of many years.
91 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
The operation of a large rotary kiln with a precalciner is comparatively sophisticated. Particularly during the process of feeding from ignition to normal operation, the burning system ’s operating condition changes are more frequent, so it is necessary to ensure that the lowering of charge of the system will be successful at a time and to emphasize and keep to the several principles as follows:
(1) Control the kiln inlet temperature at 950-1000 ℃ and the Class-1 cyclone outlet temperature at 320-360 ℃, and balance and stabilize the temperature for a period of time before starting feeding.
(2) 随时监测系统主要控制点的温度和压力,因为这是运转操作中调节燃料、料、风的主要参数。
(2) Monitor the temperature and pressure of a main control point of the system at any time, because these are the main parameters for adjusting fuel, charge and air in operation.
(3) 系统投料后在生料进入烧成带之前,将采取“留火等料”的操作方式,既要保证烧成带有一定的高温,砖面发红,又要防止过高温度使耐火砖烧融;既要保证挂好窑皮且致密平整、使熟料结粒细小均匀,又要严防结大块跑生料,所以采取略低 KH 值与 SM 值的配料方案、严格控制生料化学成分、稳定烧成温度在 1400℃左右、调整良好的火焰形状与燃烧状态。
(3) After the system’s feeding and before raw meal enters the burning zone, adopt the operating mode of "keeping fire and waiting for charge", not only for the purpose of ensuring that the burning zone has a certain high temperature and the brick face gets red, but also for the purpose of preventing the excessive high temperature from making the firebricks melted, and not only for the purpose of ensuring that the kiln coating will be hung well and it will be compact and neat, but also for the purpose of strictly preventing big pieces from running to raw meal, so adopt the admixture scheme with slightly low KH value and SM value, strictly control the raw meal chemical compositions, stabilize the burning temperature at about 1400 ℃,and adjust flame to a good shape and burning status.
(4) During the whole operation process from clinker entering a cooler begins to normal production, you should ensure the cooling efficiency of the cooler, control a suitable cooling air volume and grate bed speed, and the secondary and tertiary air
92 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
temperature as far as possible, which is particularly important to ensuring the burning atmosphere and sintering capacity inside the kiln, and that the precalciner will be smoothly ignited for lowering of charge and reach normal operation comparatively fast.
(5) During operation, you should have a steady and progressive attitude, do bold operation, be good at grabbing an opportune moment, and try hard for fast breaking through the “operation dead zone” easily making the system’s thermal regulation messy to reach normal and stable operation.
(6) Moreover, in concrete operation, particularly note the following 3 items:
* Air, fuel, charge and a kiln speed shall be matched well and their amplitudes of accommodation shall not be oversize.
* When there is hot clinker on the grate bed, you should make every effort to avoid stopping the cooling air. Even if the kiln and the grate bed stop running, you should also blow the clinker (at least the high-temperature zone) on the grate bed completely to cold before stopping air air.
* Intensify the site patrol inspection, closely monitor the pressure of each part of the preheater and for an accumulated-charge blockage circumstance discovered, treat it resolutely and in time. It is specially accentuated that the charge cleaning shall be safe and careful. Take strict precautions against an accident such as a scald.
5.3 旁路放风的投入运行 Putting Bypass System into Operation
The enrichment inside the system of the harmful component Cl- has a time process, so during an ignition period, the bypass system need not be started. But you shall pay attention to the Cl- content. For when to start the bypass system, you may adopt two modes:(1)making reference to the time for a bypass system to be put into operation after a kiln ignition for the original production line in the factory;(2)Analyzing the hot charge of a C6 cyclone discharging pipe to monitor and control the Cl- content. When the Cl- content in the hot charge exceeds 2.0%, start the bypass
93 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
system.
旁路放风系统操作中的注意事项:Points for attention in the operation of the bypass system:
(1) The air proportion shall be adjusted to 10% as soon as possible after the startup of the bypass system, and according to the hot charge Cl- content, enlarge the air proportion gradually. The regular bypass air proportion in the design shall be about 22%, but the actual air proportion shall depend on the hot charge Cl- content.
(2) A bypass air proportion is jointly controlled by adjusting the revolving speed of the bypass system fan (427FN1/428FN1) and the span of the bypass air duct regulating valve(417 DA3/418 DA3).
(3) In the bypass system, the air inlet pipeline of the bag filter (427 BF1/428 BF1) is equipped with temperature measuring points. The normal temperature shall be 180~ 200 ℃, which will control the revolving speed of the secondary cooling fan (417 FN3/418 FN3). When the temperature is higher than 180 ℃, the revolving speed will be raised, while the temperature is lower than 150 ℃, the revolving speed will be lowered.
6.系统起动及停车操作 Startup and Shutdown Operation of the System
A normal ignition has no refractory material drying and no kiln coating hanging operation, meaning that it is an operation process of re-starting after a short-time shutdown. Even if sometimes inside the kiln, the precalciner, the tertiary air duct and the preheater, fireproof inside linings are replaced locally, no special operation will be needed. It is only necessary to lengthen the temperature rise time appropriately. Going on to hang the kiln coating when starting lowering of charge will be able to lead to a smooth operation. The operation methods are fundamentally the same.
6.1.1正常点火操作前的准备 Preparations before Normal Ignition Operation
(1) 确认各种计测仪表、显示报警装置处于可工作状态。
(1) Make sure that various meters and displaying alarms are placed in workable states.
94 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(2) 确认各种风机的风门、各类阀门、三次风管热风阀等操作灵活,并处于下限位置。
(2) Make sure that the air cocks of various fans, various valves, tertiary air duct hot air valves, etc. are operated flexibly and are placed at the lower limit.
(3) 确认操作要求、控制程序与选择设备一一对应。
(3) Make sure that an operation requirement, control procedure and the selected equipment shall be of one-to-one correspondence.
(4) 所有自控回路的自动、手动选择开关置于操作要求位置。
(4) All the automatic and manual selection switches for automatic loops shall be set to the positions as required in operation.
(5) 检查所有润滑点的润滑情况,冷却用水、排水情况符合要求。
(5) Check the circumstances of all lubrication points and make sure that cooling water and water drainage meet the requirements.
(6) 检查所有检查门,清扫孔关闭。
(6) Make sure that all inspection doors and cleaning holes have been closed.
(7) 检查预热器上升烟道及废气管道,清除系统中积料。
(7) Check the preheater ascension smoke flue and the waste gas pipeline, and clear away the accumulated charge in the system.
(8) 确认系统各部位下料翻板阀,活动件能活动灵活自如。
(8) Make sure that the discharging flap valve of each part and movable parts of the system can be moved flexibly.
(9) 检查窑液压挡轮,其它设备传动、制动装置等处于可工作状态。
(9) Make sure that the kiln hydraulic pressure thrust rollers, other equipment drive, arrests, etc are be placed in workable states.
(10) 确认有足够点火用燃料,点火装置可靠、齐备。
(10) Make sure that there is enough ignition fuel and the ignition apparatuses are reliable and ready.
(11) 检查冷却机及熟料链斗输送机运转可靠,尤其是篦板完好。
(11) Make sure that the operation of a cooler and a clinker chain bucket conveyor is reliable, and a grate plate is intact.
(12) Check the refractory material condition inside the kiln, preheater and precalciner, cooler, burner and tertiary air duct and the kiln coating condition, and make sure that
95 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
they meet the requirements. Understand the residual quantity of charge inside the kiln, tertiary air duct and cooler. Carefully carry out the necessary conditions for ignition and draw up practicable ignition heating curves.
(13) Contact the number for clinker to enter the storage and select the clinker conveyance path line. Make sure that the oil storage quantity in the oil tank (or natural gas supply quantity) and the raw meal in the homogenizing storage can satisfy the demanded reserves at the initial stage of production.
(14) 确认熟料电收尘器及其引风机、冷却机风机、一次风机等关键设备能够长期连续运转。
(14) Make sure that such key equipment as a clinker EP, cooling fan, primary fan, etc. can operate for a long time and continuously.
(15) 窑及分解炉的高压油泵及循环系统的设备、控制元件能够长期连续运转。
(15) The high-pressure oil pumps of the kiln and precalciner, and the equipment, control elements of the circulating system shall be able to operate for a long time and continuously.
(16) To the situations such as equipment patrol inspection, working platform stairways, abnormal circumstance emergency treatment, etc. full cleaning shall be done and dopants shall be cleared away. It is also necessary to check whether such labor protective facilities as inspection baffles, railings, warning signs, etc. have been installed properly.
(17) 检查清扫、捅料、检修、照明、安全保护等用具准备齐全。
(17) Make sure that appliances for cleanup, charge-poking, overhauling, illumination, safety protection, etc are in readiness.
(18) 确认综合检查结果,烧成系统所有设备可以运转,通知现场岗位工人及中控室操作人员。
(18) Confirm the comprehensive inspection results. Make sure that all equipment in the burning system can operate and notify the site workers and central control room operators.
Based on the above drying operation of a system refractory material and the operation with lowering of charge for the first time, the normal ignition operation method is basically similar to this, and no unnecessary details are given. However, the following several points shall need attention:
96 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(1) 根据实际情况控制升温速率,防止温度骤变。
(1) Control a temperature rise speed according to an actual circumstance and keep the temperature from chopping about.
(2) Although the preheater is a fixed housing body, but before use, it is best to first do a ventilation trial operation with duration not less than 8 hours. During and after the trial operation, it is necessary to check each part in detail for a changed circumstance.
(3) 在窑运行稳定 2~4 小时后,就可启动分解炉燃烧器的运行,无需待三次风管耐火材料的烘干。
(3) After the kiln operation has been stabilized for 2-4 hours, you may start the running of a precalciner burner and do not need the drying of a tertiary air duct refractory material.
For a large rotary kiln of with a precalciner, you need to attain to the aims of fine quality, high output, low dissipation and long-run, safe and stable operation and have to attain "five stable"(namely stable feeding, stable calcination, stable air ventilation, a stable kiln speed and a stable Class-1 cyclone outlet temperature), as a result, it is necessary to accentuate and keep to the following several operating principles:
(1) Grasp the ignition operation. Draw up with accuracy the "ignition heating curve" under a different circumstance, make various preparations. Its key point is to let the thermal regulation of the system match the heat quantity needed for an increasing feeding capacity.
(2) Regard the furnace as the main part, and regard the stabilizing of the kiln outlet, air and charge and the synchronization of a kiln speed and fuel quantity as the operating guideline. Comprehensively judge the operating conditions and realize safe and stable operation.
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(3) During the whole operation process, the cooling efficiency of a cooler shall be ensured. Raise the secondary and tertiary air temperatures as far as possible and lower clinker discharging temperature and control a suitable cooling air volume. During this period, you should also value the reasonable coordination the ratio of a primary air volume to the axial and radial air, well control the ratio and matching of air to fuel, thus ensuring its combustion efficiency and an ideal flame shape.
(4) Grasp the ratio of a tertiary air volume to a kiln-inside ventilation quantity and the ratio of a precalciner fuel quantity to and a kiln outlet fuel quantity. For the accommodation of the control parameters, it shall be stable and slow. Avoid considerable fluctuation. It is necessary to synthesize and give attention to every side, and give treatment accurately, resolutely and effectively.
(5) During the system’s long-run operation, effectively control such important parameters as the burning zone temperature, kiln inlet temperature, Class-6 cylinder discharging temperature, Class-5 cylinder discharging temperature, each cyclone conic body negative pressure, Class-1 cylinder outlet waste gas compositions, etc, and closely monitor the safety alarm of the system’s main equipment.
(6) Operators with better technique and sense of responsibility shall see the fire frequently, observe frequently, check frequently and contact frequently. Under various circumstances, they shall be able to synthesize and judge quickly, assume exact emergency measures and make the system’s operating state always stabilized in an ideal operational control range.
(7) 具体操作中还需注意以下几点:
(7) In a concrete operation, it is also necessary to note the following several points:
a. 根据一级旋风筒出口废气分析来控制系统足够的通风,其风量不宜过大、过小,从而保证窑炉燃料完全燃烧,同时监测废气温度及 CO 的含量来保证收尘器的正常工作。
a. According to Class-1 cyclone outlet waste gas analysis, control the enough airing of the system. Its air volume shall not be oversize or undersize to ensure the complete combustion of the kiln fuel. Monitor the waste gas temperature and CO content in the meantime to ensure the regular work of a dust catcher.
98 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
b. 冷窑点火或废气温度过低,均不能接通电收尘器的高压。
b. For cold kiln ignition or if the waste gas temperature is too low, the high voltage of an electric dust catcher shall not be connected.
c. 检查冷却机风室有无漏风及串风现象。
c. Check whether a cooler air chamber has air leakage.
d. 操作中若有掉篦板现象发生,要及时停窑处理,防止篦板掉入破碎机中,造成破 坏事故。
d. If in operation, a grate plate has dropped, it is necessary to stop the kiln for treatment in time so as to keep the grate plate from dropping into a crusher, which may result in a breakage accident.
e. 密切监测烧成带窑筒体温度不得超过 400℃,保护窑皮和筒体。
e. Closely monitor the burning zone’s kiln body temperature. It shall not be more than 400 ℃ so as to protect the kiln coating and body.
f. 进行熟料质量检验,生料与热料的品质检验,并根据反馈数据,实施各部分控制参数的调整。
f. Examine the quality of clinker, raw meal and hot charge, and according to the feedback data, carry out the adjustment of the control parameters of each part.
g. Closely note the kiln inlet negative pressure and all- stage cyclone negative pressure to check whether a relevant part of the preheater has accumulated charge, blockage and surface crusting. Once it occurs, you should handle it in time. In cleaning work, particular attention shall be paid to safety and carefulness. Take strict precautions against an accident such as a scald.
h. 原料粉磨系统的开停及有关风门等设备的操作,应预先和中控操作人员联系并同意后方可进行。
h. For the operations of the startup or slowdown of a raw mill system, relevant air cocks, etc, you should contact an operator for central control in advance and get approval before doing so.
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
Before the system shutdown, notify the workshops for the raw mill, crude oil tank, high-pressure pump house, etc, of a shutdown plan, make them make full preparations and make contacts at any time in order to get mutual coordination. In principle, it is hoped that after the shutdown of the system, the kiln, raw meal storage and transport equipment will be empty, but mainly according to production demands, the time length for stopping the kiln and the limitation of the process equipment, you will be expected to decide whether to empty the raw meal storage and determine the remaining quantity of the raw meal in the silo. Moreover, when the raw mill system needs to close a hot air valve or makes the hot air change its direction, you must contact an operator for central control and get permission before operating related equipment. Take care not to make the air flow of the burning system change suddenly, which interferes with the operating condition of the kiln.
When this system is shut down, generally, the equipment that has an automatic regulating loop shall be changed over to a manual position. The normal shutdown sequence shall be: the furnace and kiln reducing fuel and charge; reducing the bypass air volume; cutting off the bypass system; first stopping the furnace, stopping charge, and then stopping the kiln. The concrete operation steps are as follows:
6.3.1分解炉的停车操作 Shutdown Operation of Precalciner
(1) 根据热耗与温度,逐步减燃料、相应减料。
(1) Reduce fuel and correspondingly reduce charge gradually according to heat loss and temperature.
(2) 根据O2含量的变化,调节窑尾高温风机转速和阀门开度。
(2) Adjust the revolving speed of a kiln inlet high-temperature fan and the span of a valve according to the change of the O2 content.
(3) When the temperature inside the precalciner descends to about 820 ℃, reduce charge appropriately. When it descends to below 800 ℃, stop fuel supply to the precalciner burner in good time. But keep the running of the precalciner burner cooling fan and turn down the air volume for cooling the nozzle.
(4) 同时调整一级旋风筒出口负压与系统排风量,减少冷却机各风室的风量。
(4) At the same time, adjust Class-1 cyclone outlet negative pressure and the air discharge volume of the system to reduce the air volume of each air chamber of the cooler.
(5) 同时降低入窑喂料量,维持在 SP 窑操作状态。
(5) At the same time, lower the feeding quantity into the kiln and maintain the mode of
100 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
operation for the SP kiln.
(6) 根据分解炉内温度变化和窑内情况,随时调节三次风管热风阀开度至合适状态。
(6) Adjust the span of the tertiary air duct hot air valve to a suitable status at any time according to the temperature change inside the precalciner and the condition inside the kiln.
(7) 适当地降低窑速来保持正常烧结,同时调整窑头燃料供给。
(7) Properly lower the kiln speed to keep normal sintering and at the same time, adjust the kiln outlet fuel supply.
6.3.2.窑的停车 Kiln Shutdown
(1) 继续逐步减料。
(1) Go on to reduce charge gradually.
(2) 同步缓慢降低窑转速,调整系统排风量和冷却机各室的风量。
(2) Simultaneously and slowly lower the kiln revolving speed and adjust the system’s air discharge volume and the air volume of each chamber of the cooler.
(3) 当窑尾温度偏高,一级旋风筒出口温度降低时,可以全闭三次风管热风阀。
(3) When the kiln inlet temperature is on the high side and the Class-1 cyclone outlet temperature is lowered, you may shut the tertiary air duct hot air valves completely.
(4) 随时调节窑头燃料供给量,既保证相应的烧结温度,又不要使窑尾温度和一级旋风筒出口温度过高。
(4) Adjust the kiln outlet fuel supplies at any time in order to ensure a corresponding sintering temperature and not to make the kiln inlet temperature and Class-1 cyclone outlet temperature excessively high.
(5) When the Class-1 cyclone outlet temperature descends to a normally low and no longer rises, you should stop feeding immediately. Step by step, turn over the discharging flap valves and clear away the accumulated charge inside all-stage cyclones, and use a blockage-blowing system for cleanup when it's necessary. If after stopping charge, the Class-1 cyclone outlet temperature is too high, you may unbolt the Class-1 cylinder manhole door or cold air valve.
(6) The kiln begins to run slowly. When the supplies inside the kiln basically empty, stop fuel and the primary fan, and at the same time, start the accident fan to cool and
101 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
protect the burner from scald. Pull out the kiln hood after being cooled to a certain extent. Prevent by all means a primary air volume from being oversize, which makes the kiln coating become suddenly cold and collapse.
(7) Reduce air or stop the kiln inlet ID fan. Note at this moment that you must make the temperature inside the kiln drop slowly and protect the kiln coating and inside lining well. Note that when the Class-1 cyclone outlet temperature is higher than 100 ℃, you should slow down the kiln inlet high-temperature fan to prevent the vane from being deformed.
(8) 停窑操作过程中,窑慢转间隔要求大体如下:
0~1 小时,连续慢转
1~3 小时,每隔 15 分钟转 1/4
3~6 小时,每隔 30 分钟转 1/4
6~12 小时,每隔 60 分钟转 1/4
12~24 小时,每隔 120 分钟转 1/4
24 小时以后,根据窑内温度情况而定
(8) During the process of kiln shutdown operation, the intervals for the kiln to rotate slowly are as follows:
0-1 hour, continuous slow rotation
1-3 hours, rotating by 1/4 every 15 min
3-6 hours, rotating by 1/4 every 30 min
6-12 hours, rotating by 1/4 every 60 min
12-24 hours, rotating by 1/4 every 120 min
After 24 hours, they shall depend on the temperature circumstance inside the kiln.
6.3.3 冷却机的停车操作 Shutdown Operation of Cooler
(1) 根据窑、分解炉、预热器的风量要求,及时调整冷却风机的转速和风门开度。
(1) According to the air volume requirements of the kiln, precalciner and preheater, adjust in time the revolving speed of a cooling fan and the span of an air cock.
(2) Slow down the kiln and simultaneously lower the grate bed speed. After the kiln stops unloading charge to the cooler, you should stop pushing the grate bed to keep the
102 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
clinker layer. If the cooler is overhauled, you should empty the grate bed of charge before a shutdown.
(3) After the grate bed stops running, you should blow the clinker on the grate bed to completely cold before stopping the cooling fan to protect the grate plate. Emptying the grate bed of supplies shall be done while the cooling fan is running.
(4) The clinker crusher shall be located behind the 1# grate bed. After the 1# grate bed stops, stop the clinker crusher and then stop the 2# grate bed, but the water cooling, and air air cooling systems shall be stopped only after the equipment is cooled to below a safe temperature.
(5) 待各风室内的细碎熟料全部排空后,才可停卸灰系统。
(5) Only after all the fine crushed clinker of each air chamber has been emptied may you stop the ash-unloading system.
(6) 停冷却机各部分的润滑系统。
(6) Stop the lubricating system of each part of a cooler.
(7) After each cooling fan stops, stop the clinker EP and its induced draft fan. Note that before stopping the induced draft fan, you must control the kiln outlet negative pressure in order to prevent hot gas coming out from the kiln hood from injuring a person.
(8) 待熟料电收尘器回灰及设备内的余料排净后相继停止熟料输送系统。
(8) After the back ash of the clinker EP and the remaining charge inside the equipment are emptied completely, go on to stop the clinker conveying system.
6.3.4 其它 Others
(1) 待预热器、窑、冷却机停机后,才能停止系统内的其余辅助配套设备,才能停气、停水。
(1) Only after stopping the preheater, kiln and cooler may you halt the other auxiliary and matching equipment in the system, and air and water supply.
(2) 关闭各种计测仪表、电气设备。
(2) Shut down various meters and electric equipment.
(3) 记录停机时间和停机情况,报告生产调度。
103 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
(3) Record the shutdown time and circumstance and report to production dispatching.
6.4 故障停车和重新起动 Trouble halt and restart
6.4.1 故障停车 Trouble halt
故障停车包括设备故障停车和工艺故障停车两种。对于设备故障停车,一般说来其停车顺序、速度均取决于设备之间的联锁关系或 PC 控制,不能在现场人为地加以干涉,而工艺故障停车在许多情况下其停车顺序、时间都可以人为地加以选择,也往往需要对 PC 控制解锁来灵活实施处理故障的手段,但不管发生哪一种故障,我们建议其操作处理原则必须遵循以下步骤:
Trouble halt include equipment trouble halt and technology trouble halt. For equipment trouble halt, generally its sequence and speed of halt depends on connection or PC control between the equipments. No interference is allowed onsite. For technology trouble halt, the sequence and time of halt allows casual selection in many circumstances, but it often requires unlocking PC control to flexibly implement the means of trouble shooting. No matter what kind of trouble happens, we suggested that principle for its operation and treatment shall follow these steps:
(1) According to display and alarming of the instruments, make timely judgment about cause of the trouble, time for trouble shooting, degree of impact upon technology production and safety of the equipment, and then find the effective solution.
(2) 尽可能在中控室进行处理,尽可能快地恢复正常生产。
(2) Try to make treatment in the central control cabinet and recover the normal production as soon as possible.
Additionally, halt of kiln due to any reason shall mitigate the cooling process of the kiln system as possible and reduce the cold air amount into the system, so as to avoid any damage of abrupt cooling down incurred to the kiln surface and lining. When the time for halt of kiln is estimated less than 4 hours and the trouble can be eliminated immediately, heat conservation measures can be implemented. Small amount of fuel is sprayed in into the kiln outlet at interval or continuously, so
104 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
as to create condition for restart of the system and quick commencement of normal operation.
When the kiln is restarted, change in temperature of the kiln should be noticed. Judgment shall be made whether the fuel is sprayed in directly or sprayed through ignition, so as to prevent the gas not combusted accumulating in the kiln and the pipe of preheater and thus inducing explosion. Therefore, following operational principles shall be followed:
(1) After short-time suspension of the kiln and heating of the kiln is made anew, it shall be ensured the temperature of the kiln can satisfy requirement of direct combustion of the fuel before it is sprayed in directly; otherwise combustion shall be promoted by ignition.
(2) 喷燃料时,必须调整风量,避免产生还原气氛。
(2) When fuel is sprayed, air volume shall be adjusted to avoid production of reducing atmosphere.
(3) 若窑的温度较低或在调整火焰时,燃料增加要缓慢,不要突然增加。
(3) If temperature of the kiln is low or when the flame is adjusted, increase of the fuel shall be slow rather than abrupt.
(4) 若需要调节一次风和二次风时,要缓慢地进行,切忌猛增猛减。
(4) Adjustment of primary air and secondary, if any, shall be conducted slowly. Sharp increase or decrease is forbidden.
(5) 分解炉的投入应视故障停车时间的长短和重新起动时的系统工况条件酌情而定。
(5) Input of the precalciner shall be determined as per time of the trouble halt and system working conditions in time of restarting.
(6) In trouble halt, if slow rotation of kiln causes excessive accumulation of materials on a stretch of grate bed on the cooler, inspection to the grid plate shall be conducted in restarting and accumulated clinker shall be sent out at the beginning of starting.
(7) 故障停车较长时间后的冷窑重新起动,重新点火、升温、投料可参考前述有关条文并酌情调整。
(7) Restarting, re-ignition, reheating and material inputting of cold kiln after long time of trouble halt can refer to relevant articles afore-mentioned and are subject to proper adjustment.
105 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
7. 常见故障及处理 Common troubles and handlings
(1)窑头燃烧器系统 Burner system of the kiln outlet
常见故障Common fault
可能的原因或现象
Possible cause or phenomenon
主要操作处理
Main operational handlings
1.火焰分叉
Forking of flame
1.燃烧器管头部有杂物
There is impurity at the inlet of the burner
2.燃烧器管口变形
Nozzle of the burner deforms
清除 Clear
更换 Replace
2. 火 焰 形 状 不佳
Poor shape of flame
1.径、轴向风比例不佳
Poor proportion between radial and axial airs
2.一次风过大过小
Excessive high or low volume of primary air
3.燃烧器出口风速低
Speed of air at the burner outlet is low
调节燃烧器上相应阀门
Adjust corresponding valve on the burner
适当调节一次风进口阀开度
Properly adjust openings of the primary air inlet
减小管道及阀门的压力损失
Reduce pressure loss in the pipe and the valve
窑炉用风配合不当
Air used for the kiln oven is poorly matched
调总排风量或适当关小三次风阀
Adjust rotation speed of main ventilation fan at the kiln inlet of opening of the valve
系统排风量不够,窑内燃烧不充分
System has insufficient ventilation amount and combustion in the kiln isinsufficient
调窑尾主排风机转速或阀门开度
Adjust rotation speed of main ventilation fan at the kiln inlet of opening of the valve
窑尾负压过大
Negative pressure of the kiln inlet is too large
清理系统结皮堵料
Clear away crusting blockage of the system
3. 窑 尾 温 度 偏低
Temperature of the kiln inlet is relatively low
二次风温偏低
Temperature of the secondary
适当关小冷却风机阀门开度
Properly reduce opening of valve of the
106 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 可能的原因或现象 主要操作处理 Common fault Possible cause or phenomenon Main operational handlings
air is relatively low cooling fan
4 .一次风机停车
Primary fan halt
1.风机润滑不良
Fan lubrication is poor
2.轴承温度超限
Temperature of the bearing goes beyond limit
3.电气故障等
Electric trouble, etc.
a.起动备用风机。系统继续运行
Start the backup fan and the system go on operating
b.备用风机不能启动,则关闭窑头所用燃料的流量阀。
If the backup fan cannot start, shut off flow valve for the fuel used at the kiln outlet.
c.现场全开燃烧器的外流风阀,紧急启动事故风机,或酌情考虑是否拉出燃烧器。
Outflow valves of the burner onsite are opened. Make emergent start of the accident fan or, in necessary situation, consider whether to pull out the burner.
d.窑尾主排风机慢转,系统保温冷却。Main ventilation fan of the fan kiln inlet rotates slowly and the system is cooled and conserves heat.
e.窑连续或间隔慢转
The kiln slowly rotated in succession or at interval
5.窑头燃油/燃气 供 应 断Supply of fuel oil/fuel gas at the kiln outlet breaks off
1.备用系统故障
backup system trouble
2.电气故障
Electric trouble
3.CO 气体严重超标
CO gas exceed the standard seriously
a.停窑、停料、停分解炉燃料,否则会出现生烧料,还会使窑温降低过快,重新起动困难。
Stop operation of kiln, or supply of material or precalciner fuel; otherwise raw meal will be produced and temperature of the kiln will be reduced too fast, making it easy to restart.
b.调整系统风量及冷却机冷却风量、慢转窑。
Adjust air volume of the system and cooling air amount of the cooler, and slowly rotate the kiln.
107 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 可能的原因或现象 主要操作处理 Common fault Possible cause or phenomenon Main operational handlings
c.停篦床。
Halt the grate bed
d.查明故障,尽快处理。Locate the trouble and make treatment as soon as possible.
(2)分解炉燃烧器系统 Precalciner burner system
常见故障Common fault
可能的原因或现象
Possible cause or phenomenon
主要操作处理
Main operational handlings
1.分解炉燃烧器 熄 火Precalciner burner extinguishes
1.分解炉内温度过低
Temperature in the precalciner is too low
2.三次风过大
Excessive volume of tertiary air
适当关小三次风管阀门开度,调慢篦床速度,加大高温区冷却风量,减小低温区冷却风量。
Properly reduce opening of the Tertiary Air Duct., slow down speed of the grate bed, increase cooling air volume in the high-temperature zone and reduce cooling air volume in the low-temperature zone.
2.分解炉内温度 过 高Temperature in the precalciner is too high
喂入的燃料量过大
Excessive amount of feeding fuel
适当减小燃料喂入量
Properly reduce feeding amount of the fuel
3 分解炉燃烧器断油或断气Precalciner burner breaks supply of oil or gas
(故障原因同窑头燃烧器)
(cause for trouble is the same as the kiln outlet burner)
a.减窑喂料量
Reduce kiln feeding amount
b.关闭三次风管热风阀开度。
Shut off the tertiary Air Duct and opening of the hot air valve.
c.根据煅烧情况,温度变化来控制窑燃烧器燃料量和窑速。
Control fuel amount of kiln burner and kiln speed according to calcinations situation and change of temperature.
d.调整窑尾主排风机转速或阀门开度及冷却机冷却风量。
Adjust rotation speed of main ventilation fan of the kiln inlet or opening of the valve
108 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障Common fault
可能的原因或现象
Possible cause or phenomenon
主要操作处理
Main operational handlings and cooling air volume of the cooler.
e.加强监视窑尾、旋风筒、下料翻板阀的工作情况,定时清吹,防止积料。
Intensify monitoring over working of the kiln inlet, cyclone and feeing flap valve. Make regular blow-out, so as to prevent material accumulation.
(3)烧成通风系统和生料系统 Burning ventilation system and raw meal system
常见故障Common fault
可能的原因或现象
Possible cause or phenomenon
主要操作处理
Main operational handlings
1.风机润滑不良;
Poor lubrication of the fan;
2.轴承温度超限;
Temperature of the bearing exceeds the limit;
a.停料、停分解炉燃烧器,必要时也停窑头燃烧器,注意保温操作。关闭三次风。
Halt material supply and precalciner burner. If necessary, halt the kiln outlet burner also and pay attention to heat conservation operation. Shut off the tertiary air.
b.窑筒体间隔或连续慢转,酌情拉出燃烧器,防止弯曲变形。
Kiln cylinder slowly rotates at interval of in succession. Pull out burner properly according to situation, so as to prevent distortion and deformation.
c.减冷却机篦速直至停止,减冷却风量,注意窑头负压的变化。
Reduce speed of the cooler gate bed till it stops. Reduce the volume of cooling air. Pay attention to change of negative pressure at the kiln outlet.
系统漏风大造成超负荷
Large air leakage of the system causes super load
加强预热器系统监测,严防堵料,定期清理。
Intensify monitoring over the preheater system. Strictly prevent material blockage and make clearing regularly.
1.窑尾主排风机停车
Halt of main ventilation fan of the kiln inlet
电气故障等
Electric trouble, etc.
查明故障原因,尽快进行处理
Find out cause of the trouble and make treatment as soon as possible.
109 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 可能的原因或现象 主要操作处理 Common fault Possible cause or phenomenon Main operational handlings
2.熟料电收尘器引风机停车Fan halt caused by EP for the clinker
(同上)(Same as above)
a.密切注意窑头罩的负压变化。严防风机发生热变形。
Pay close attention to change in negative pressure of the kiln hood. Strictly prevent deformation of the fan in heat.
b.估计排除故障时间较长,则应减料、减燃料,直至停止。
If estimated time for trouble shooting is long, reduce the material and fuel, till it halts.
c.减小冷却机低温区冷却风量,甚至停止低温区冷却风机。
Reduce cooling air volume in the low-temperature zone of the cooler, till cooling fan in the low-temperature zone halts.
d.观察篦床上熟料的冷却情况,严防篦板烧坏。
Observe cooling of clinker on the grate bed and strictly prevent the grid plate from being burnt down.
e.根据系统操作难易,对设备安全的影响程度以决定是否停窑。
According to hardship of the system operation and degree of impact upon safety of the equipment, decide whether to halt the kiln.
f.查寻原因,排除故障。
Find out the cause and shoot the trouble.
3.生料喂料系统停车
Halt of raw meal feeding system
1.斜槽透气层糊死或破损;
Ventilation layer of the chute is agglutinated tightly or damaged;
2.斜槽供气风量或风压不足;
Air supply or air pressure of the chute is insufficient;
If trouble of the feeding system can be eliminated immediately and no long-term material supply of the system is caused, the precalciner burner can be halted. Adjust air volume of each part of
110 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障 可能的原因或现象 主要操作处理 Common fault Possible cause or phenomenon Main operational handlings
3.各管道阀门控制位置不对;
Control position of the pipe valve is improper;
4.罗茨风机故障等。
Roots blower trouble., etc.
the system and implement heat-conservation operation.
b.如故障造成系统过长时间停料,严重影响窑系统的操作,则参照前述“正常停车”有关部分实施停窑。
If the trouble results in too long-term material halt of the system and seriously impacts operation of the kiln system, halt the kiln in reference to relevant part in aforesaid “Normal Halt”.
(4)窑及预热器系统 Klin and Its Preheater System
常见故障Common fault
可能的原因或现象
possible reasons or phenomena
主要操作处理
main operating handlings
1. 跑 生 料Leakage of raw meal
1.窑尾温度下降过大,燃料喂入量过小;
The temperature in the klin inlet decreases too much, fuel feeding amount is too little;
2.预热器塌料,生料窜入烧成带;
The material of the preheater collapses, the raw meal enters into burning zone;
The current of the klin decreases, the temperature of burning zone and the NOx concentration decreases, the negative pressure of kiln outlet fluctuates, the speed of graterplate of the cooling machine is a little faster, the kiln outlet and cooling machine generates ash.
a.减少喂料量和增加燃料喂入量。
Reduce material feeding amount, increase fuel feeding amount.
If the raw meal enters into the burning zone, it’s should to reduce the material feeding amount, after the klin current and the temperature of the burning zone raises or has the tendency to raise, then increase material feeding amount, raise the rotation speed of klin, adjust fuel feeding amount. Be aware of the added feeding amount of material and fuel can not be too much.
1.烧成带温度或窑筒体温度变 a.调整火焰,窑内热负荷不宜过高。
111 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障Common fault
可能的原因或现象
possible reasons or phenomena
主要操作处理
main operating handlings
2.掉窑皮
klin coating falls down
化急剧。
The temperature of burning zone or the temperature of cylinder of klin changes sharply.
2.原窑皮完整性不好。
The integrality of the original klin coating is not good.
3.窑电流短时间内异常迅速地高出正常值,筒体局部高温。
The klin current quickly exceeds the normal value in short time; the temperature in local of cylinder is very high.
4.可见窑皮,呈暗红色。
The klin coating is seeable and the color is wine.
Adjust flame; the heat load within the klin should not be too high.
b.适当减慢窑速,修补平整窑皮,待窑内正常时缓慢恢复窑速。酌情开停筒体冷却风机。
Properly slow down the turning speed of klin, repair and level the klin coating, slowly restore the turning speed of the klin after the inner of the klin is normal. Start and stop the air cooling machine of cylinder based on actual situation.
c.掉窑皮筒体温度严重超限时,应停窑。
If the temperature of the cylinder from which the klin coating falls, then the klin should be stopped.
3. 回 转 窑 停 车rotary klin is stopped
1.传动齿轮及托轮轴承润滑不良磨损严重。
The lubrication of driving gear and the bearing of supporting roller are not good and are worn seriously.
2.液压挡轮系统故障。
The Hydraulic thrust roller system failure.
3.窑头、窑尾密封圈损坏,漏风严重。
The seal rings at the kiln outlet and kiln inlet are damaged and the air leakage is serious.
4.大小齿轮、托轮与轮带接触不良。
The contact between big and small gears, supporting roller and tyre is not good.
Stop the reduction furnace and kiln outlet burner immediately, stop feeding material, reduce the cool air amount of the air cooling machine, adjust the turning speed of the induced draught fan of the clinker EP to prevent too much cool air enters into klin, keep the temperature of the klin.
b.减小窑尾主排风机转速或阀门开度,注意防止废气温度超限。
Reduce the turning speed of main air exhauster in the kiln inlet or the opening of the valve, and be aware of avoiding the temperature of the exhaust gas goes beyond limitation.
c.用辅助传动慢转窑,注意窑尾积料。
Use associate driving device to turn the kiln slowly, be aware of the material
112 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障Common fault
可能的原因或现象
possible reasons or phenomena
主要操作处理
main operating handlings accumulations in the kiln inlet.
d.降低冷却机篦床速度,但不要使热熟料烧坏篦板。
Slow down the speed of the grater bed of cooling machine, but don’t make the hot clinker to burn out the grater board.
e.如较长时间不能排除故障,应考虑全系统停车。
If the failure can not be eliminated after a long period of time, it’s should be considered to stop the whole system.
f.查明原因,进行处理。
Find out the reason and handle it.
4. 预 热 器 塌 料the material of preheater collapses
1.窑尾排风量突然下降。
The exhaustion amount in the kiln inlet suddenly decreases.
2.清理旋风筒或管道堵塞时突然冲料表现为锥体负压突然降低。
The material is suddenly pushed out while cleaning the cyclone or pipe, showing that the negative pressure suddenly decreases.
3.窑尾温度下降幅度很大。
The temperature in the end of klin decreases greatly.
4.窑头负压减少,可能显正压。
The negative pressure of kiln outlet decreases and maybe shows positive pressure.
a.塌料严重按窑跑生料故障处理,参见前述。但注意窑头负压的调整,严防热气流冲出伤人。
If the falling of material is serious, then handle the failure as same as the failure of outputting raw material, refers to the above mentioned process. But pay attention to the adjustment of the negative pressure of kiln outlet to avoid the hot airflow rushes out and hurt people.
b.对于较小程度塌料,一般不作特别处理,可适当增加窑头燃料喂入量,酌情调整操作。
For slight falling of material, in ordinary, there is no need to take special handling, it’s can properly increase the fuel feeding amount and adjust operation correspondingly.
5. 预 热 器 堵 塞停车
the preheater is blocked and stopped
1.分解炉温度偏高,物料粘性增大,逐渐积存在锥部,未及时清堵。
The temperature inside reduction furnace is a little higher, the stickiness of material is increased which
a.根据各级旋风筒负压显示,判断堵料位置。
Judge the material blocking position based on the display of negative pressure of different level cyclones.
b.如堵料严重,防堵清吹系统已失灵则应人工捅料,此时特别注意人身安全。
113 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障Common fault
可能的原因或现象
possible reasons or phenomena
主要操作处理
main operating handlings makes materials gradually cumulates in the cone part and haven’t been cleaned in time.
2.旋风筒锥部物料垮落,下料管堵塞。
The material in the cone part of cyclone falls down and blocks the material feeding pipe.
3.下料翻板阀长期窜风,下料管本身结皮。The feeding flap valve leaks air for a long time, the feeding pipe forms agglomeration.
If the material blocks seriously and the anti-block and cleaning and blowing system is fail, then it’s should to poke the blocked material manually, in this case, it’s should pay much attention to personal safety.
If the failure can not be eliminated, it’s must to stop feeding material and fuel, stop klin. It’s forbidden to handle the blocked material by increasing exhaustion of kiln inlet within 4 hours after the klin stopped due to material blockage. The concrete stopping sequence can basically refer to “normal stopping”
d.排除堵塞基本操作步骤:
Basic operating steps for eliminating blockage:
(1)确认堵料位置,从相应最高的观察孔观察。
Identify the blocking position and observe from the corresponding highest inspection hole.
(2)从堵塞的那级旋风筒开始将其以下的下料翻板阀用铁丝全部吊开。
Hoist up the all feeding flap valves hereinafter the blocked cyclone by using iron wire.
(3)根据堵料位置,用高压风管捅料棒从物料的上面向下处理,尤其要清除结皮。Based on the blocking position, poke from up-down by using material poking stick for high pressure wind pipe, particularly to clean up the formed agglomeration.
(4)处理故障时不能转窑,同时要通知有关
114 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障Common fault
可能的原因或现象
possible reasons or phenomena
主要操作处理
main operating handlings 岗位注意安全,防止冲料凶猛、烫伤人。
The klin can not be turned while handle faults, at the mean time, notice relative posts to pay attention to safety to avoid the material rushes out and scald people.
(5) 清理堵料前,下级旋风筒所有孔洞均须关闭。
Before clean blocked material, all holes in different level of cyclones must be closed.
(6) 关闭空气炮系统 Shut off air canon system
(7)堵料清除完毕后要仔细检查 Carry out detailed check after the blocked material is cleaned up.
下料翻板阀动作不灵活、卡死the feeding flap valve cann’t move freely or is deadly blocked
调整翻板阀,使其灵活。
Adjust the feeding flap valve to make it moves freely.
有害成分超标
the harmful components exceed indexes
检查有害成分含量 check the content of harmful components
增加旁路放风的比例 raise the proportion of bypass ventilation
(5)冷却机及冷却风机系统 Cooling Machine and Air Cooling Machine System
常见故障Common fault
可能的原因或现象
Possible cause or phenomenon
主要操作处理
Main operational handlings
1. 冷 却 机 篦 床停车
Grater bed of cooler stop
1. 液 压 系 统 故 障 hydraulic system failure
2 . 熟 料 破碎 机 故 障 clinker crusher failure
3.电气故障 electrical failure
a.按“正常停车”顺序停窑。
Stop klin based on the sequence of “normal stop”.
b.继续通风冷却熟料,调整熟料电收尘器后引风机转速,使风改变流向,减小入窑二次风量。
Continue ventilation to cool clinker, adjust the turning speed of the backward induced draught fan of clinker EP, and change the flow direction of the wind so
115 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障Common fault
可能的原因或现象
Possible cause or phenomenon
主要操作处理
Main operational handlings as to reduce the secondary air volume.
c.如有人在冷却机内作业应禁止窑头喷燃料保温。
It’s forbidden to spay fuel into kiln outlet to keep its temperature while there is someone working within the cooler.
篦板损坏
grater board damaged
继续把熟料送空,也可停止篦床,注意尽量不让篦板掉入破碎机中,捡出篦板。
Continue to output clinker till it is finished, it’s also can stop grater bed, be aware of don’t letting grater board drops into crusher as much as possible, pick up grater board.
2. 冷 却 机 篦 下风室堵死
the air chamber under the grater of cooler is deadly blocked
1.篦板坏,漏料多。
The grater board is damaged and leaks lots of materials.
2.熟料中细料过多。
There is too much fine stuff in the clinker.
3.冷却机篦下压力增高。
The pressure under the grater of cooler increases.
4.风室内风温升高。
The air temperature inside the air chamber increases.
a.检查篦床上熟料冷却情况和漏料温度。Check the cooling situation of clinker in grater bed and the temperature of leaked clinker.
b.及时更换损坏零件。Replace damaged parts in time.
d.按控制要求停窑。Stop klin according to control requirement.
3. 冷 却 机 进 料口堵塞
the feeding opening of cooler is blocked
1.熟料结大块或掉大块窑皮。
The clinker agglomerates in big block or big block drops from klin coating skin.
2.冷却机进料口结皮堆料。
The feeding opening of cooler agglomerates which results in material accumulation.
3.篦床故障停车而窑仍运转下料。
The grater bed is stopped due to fault whereas the klin still works and feed material.
a.加大冷却风量和熟料电收尘器引风机排风量。
Increase cooling air amount and the exhaustion amount of induced draught fan of clinker EP.
b.提高篦床速度。
Increase grater bed speed.
c.防止窑不正常运转,检查熟料化学成分并予以控制。
Avoid abnormal running of klin, check the chemical component of clinker and make control of its.
d.停窑,从冷却机侧部清理检查口及时人
116 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障Common fault
可能的原因或现象
Possible cause or phenomenon
主要操作处理
Main operational handlings
4.预热器塌料或清理堵塞时突然垮落冲料。
The material of preheater falls down or suddenly collapses while clean blockage.
5.二次风温偏低。Secondry air temperature is a little lower.
工捅料排除。
Stop klin, clean the inspection hole from the side of cooler and poke the material and eliminate blockage in time.
e.重新启动。Restart
4. 篦 床 上 出 现“红料流”
"Red material flow" occurs on the grate bed.
见篦冷机部分 3.5.3.5
See the part of grate cooler 3.5.3.5
见篦冷机部分 3.5.3.5
See the part of grate cooler 3.5.3.5
5.堆“雪人”
Forming the snowman
见篦冷机部分 3.5.3.5
See the part of grate cooler 3.5.3.5
见篦冷机部分 3.5.3.5
See the part of grate cooler 3.5.3.5
熟料粒度过细
The particle size of the clinker is too small.
提高窑头温度,检查熟料率值 SM 是否过大
Increase the temperature of kiln outlet, and check to see whether SM, one of the modulus values of clinker, is too big or not
篦床上出现“红料流”
"Red material flow" occurs on the grate bed.
参见上述
See above.
风室冷却风量过大,熟料层被吹穿
The cooling air volume of the air chamber is too big, and the clinker layer is blown through.
减小该风室风量,适当减慢篦速
Decrease the air volume of this air chamber, and slow down speed of the grate appropriately
风室冷却风量过小,不足以充分冷却熟料
The cooling air volume of the air chamber is too small to cool the clinker completely
开大该风室风量,适当加快篦速
Increase the air volume of this air chamber, and accelerate speed of the grate appropriately
6. 篦 板 温 度 偏高
Higher temperature of the grate plate
篦床上有大块熟料
Large-size clinkers appear on the grate bed
适当加快篦速
Accelerate the speed of the grate appropriately
117 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障Common fault
可能的原因或现象
Possible cause or phenomenon
主要操作处理
Main operational handlings
篦床速度过快,料层过薄
The speed of the grate bed is too fast, and the material bed is too thin
适当减慢篦速
Slow down the speed of the grate appropriately
冷却风量不够
Insufficient cooling air volume
适当增加有关风室的风量
Increase the air volume of relevant air chambers appropriately
篦床速度过快
The speed of the grate bed is o fast to
适当减慢篦速
Slow down the speed of the grate appropriately
7. 冷 却 机 出 料温度偏高
Higher temperature of the material discharged from the cooler
篦床上出现“红料流”或熟料结大块
“Red material flow” or large clinker block occurs on the grate bed
参见上述
See above.
8. 冷 却 机 的 冷却 风 量 不 够Insufficient cooling air volume of the cooler
1.熟料层太厚。
The clinker layer is too thick.
2.篦床速度之间的比率不当,使得二段低压不能通过熟料层。
The second-section low pressure could not get through the clinker layer due to improper rate between speeds of grate beds.
3.熟料在篦床上局部堆积。
Clinker deposit on part of the grate bed
a. 检查篦板与压力设定值比较是否合适。如有必要的话,改变压力设定值加快篦速。
Check to see whether the setting value of the pressure is proper for the grate plate. Change the setting value of the pressure and accelerate the speed of the grate if necessary.
b. 改变篦床速度之间的比率,加快二段篦速,减薄熟料层。
Change the rate between speeds of grate beds, accelerate the grate speed of second-section, and thin down the clinker layer.
If tripping of a fan under the grate plate occurs, the corresponding drive of the grate plate must be stopped after 5
118 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障Common fault
可能的原因或现象
Possible cause or phenomenon
主要操作处理
Main operational handlings
Motor failure and etc. minutes, in order to prevent the cooling seam of the Coanda nozzles from being blocked by fine clinkers. The normal shutdown process should be abided by afterwards.
b.如果篦板下的所有的冷却风机跳停,相应的篦床应在 1 分钟内停止,再过 5 分钟停窑。
If tripping of all cooling fans under the grate plate occurs, the corresponding grate bed must be stopped within 1 minute, and the kiln must be shut down after 5 minutes.
c.注意窑头的负压变化,随时调整熟料电收尘器后引风机的转速。
Pay attention to variation of the negative pressure of the kiln outlet, and adjust the rotation speed of the exhauster behind the electric precipitator of clinker at all times.
10.全厂停电
Blackout of the whole plant
a.断开所有设备的启动开关。
Cut off start switches of all equipments.
b.事故风机及窑辅助传动接通保安电源,紧急启动间隙慢运转。
Switch on emergency power for the emergency fan and auxiliary drive of the kiln, and start up interval slow running urgently.
c.拉出窑头燃烧器。
Haul out the burner from kiln hood.
d.注意窑尾风机的间隙慢运转。
Pay attention to the interval slow running of the fan of kiln inlet.
e.注意窑系统冷却要缓慢,并为可能短时间来电重新启动创造可能性。
Make sure that the kiln system is cooled slowly, and create possibility for restart due to possible power-on within a short period of time.
119 / 120
HOFUF CEMENT PLANT 5th & 6th EXTENSION PROJECT Burning System
常见故障Common fault
可能的原因或现象
Possible cause or phenomenon
主要操作处理
Main operational handlings
f.恢复运行应先适当清理预热器下料管及窑尾烟室积料。
Clean up material deposits in discharging pipe of the preheater and smoke chamber of the kiln inlet before restoring the system to normal operation.