16Procedure of Boiler Steam Blowing OK(Only Oil)PASSED

PLTU 1 Jatim-Pacitan (2315MW) Project

Procedure of Boiler Steam Blowing

C Revised as comments 01/03/2011 Liu Gang Long Sheng Zeng Bin Zhang Yaping

B Revised as comments 12/15/2010 Liu Gang Long Sheng Zeng Bin Zhang Yaping

A For approval 8/2/2009 Liu Gang Long Sheng Zeng Bin Zhang Yaping

Rev. Description Date Prepared Checked Reviewed Approved

PT.PLN(PERSERRO) Owners

DWG No. 0702-00-M-01-LB-001

PT REKADAYA ELEKTRIKA PT.PLN(PERSERRO)

JASA SERTIFIKASI(LMK)

CONSORTIUM OF

DONGFANG ELECTRIC CORPORATION AND DALLE ENERGY

SiChuan Electric Power

Commissioning & Test Institute PLTU 1 Jatim-Pacitan (2315MW)

Project DETAIL DESIGN STAGE Approval Check Review Design Procedure of Boiler Steam Blowing

Date Scale N/A DWG No. SCCTI-TS-GL-CS-016-2009A REV C

PLTU 1 Jatim-Pacitan2315MW Project Procedure of Boiler Steam Blowing REV C Commissioning

Procedure SCCTI-TS-GL-CS-016-2009A Page 2 of 65

Table of Contents

1. PURPOSE ....................................................................................................................................3

2. SCOPE .........................................................................................................................................3

3. PREPARATION BASIS...............................................................................................................3

4. GENERAL DESCRIPTION OF SYSTEM AND EQUIPMENT ................................................3

5. TOOLS, INSTRUMENT FOR COMMISSIONING ...................................................................5

6. PREREQUISITE FOR COMMISSIONING ...............................................................................5

7. MEASURES FOR COMMISSIONING ORGANIZATION ..................................................... 11

8. BLOWING FLOW.....................................................................................................................12

9. BLOWING PARAMETERS AND THE QUALIFIED STANDARD ....................................... 13

10. TEMPORARY FACILITY FOR BLOWING ............................................................................14

11. PREPARATION PRIOR TO IGNITION ................................................................................... 16

12. TEMPERATURE RISING AND PRESSURE RISING FOR BOILER IGNITION..................29

13. BLOWING PROCEDURE ........................................................................................................31

14. SAFETY MEASURES ..............................................................................................................33

15. APPENDIX................................................................................................................................38

15.1 Appendix 1 Blowng condition checklist........................................................................................39

15.2 Appendix 2 Record list for blowing acceptance ............................................................................46

15.3 Appendix 3 calibration certificate for instrument ..........................................................................47

15.4 Appendix 4 Record Table for Blowing Parameters .......................................................................52

15.5 Appendix 5 Checklist for Motorized Valve of Steam-Water System.............................................53

15.6 Appendix 6 Checklist for Control Valve of Steam-Water System .................................................59

15.7 Appendix 7 Blowing Diagram.......................................................................................................61

15.8 Appendix 8 Blowing Diagram for Desuperheating water Pipeline of SuperHeater or Reheater...61

15.9 Appendix 9 Processing Diagram of Grain Collector .....................................................................61



1. Purpose The procedure of boiler steam blowing will be employed to blow away the foreign matters remained in the such systems as the boiler superheater, reheater and steam pipeline to ensure the safe and economic operation of the unit.

2. Scope This procedure is applicable for the commissioning of steam blowing of the unit, the blowing scope covers:

2.1 The boiler superheater system and the main steam pipeline;

2.2 The boiler superheater system, the reheating pipeline at cold section and the reheating pipeline at hot section;

2.3 The main steam desuperheating water pipe and desuperheating water pipeline for the reheater

2.4 The high pressure bypass pipeline of steam turbine

2.5 The gas source for the shaft seal of steam turbine and other pipelines at the steam turbine side

3. Preparation Basis 3.1 The boiler burning and coal pulverizing system( DWG.NO.50F296SJ0201A03 );

3.2 The thermodynamic system diagram for the whole boiler plant (DWG.NO.50F296SJ0201A04,08,09,16);

3.3 Boiler Product Manual;

3.4 Manual for Boiler Installation

3.5 Manual for Boiler Operation

4. General Description of System and Equipment 4.1 The model of boiler: DG1025/18.3-II13, natural circulation brown coal-fired drum boilers

with single tangentially fired furnace (at four-corner), Type II arrangement in open air, reheat system and balanced draft.

4.2 Temperature regulating mode: the water spray desuperheating is employed for the superheating steam, swaying of the burner nozzle is taken as the principal for the reheating steam and micro regulating by water spray is assisted.

4.3 The model of the coal mill is HP963; five coal mills are provided for each boiler (when the coal is designed for burning, four operating and one standby).

4.4 The arrangement and type for the burner: four-corner arrangement is employed; the centerline of the four-corner mounted burner is tangent with two imaginary circles the centerline of the furnace respectively; the diameters for two imaginary circles are 548mm and 1032mm respectively.

4.5 Main parameters of the boiler: designed coal

Item Unit BMCR BRL TMCR 75%THA 50%THA

Flow T/h 1025 971.1 971.1 706.8 485.2 Main steam Press. MPa 17.5 17.42 17.42 14.30 9.44



Temp. 541 541 541 541 535 Flow T/h 839.4 798.1 793.4 571.0 416.2

Inlet press. MPa 3.86 3. 68 3.65 2.74 1.90

Outlet ress. MPa 3.68 3.51 3.49 2.65 1.85

Inlet temp. 329 322 320 313 318

Reheat steam

Outlet temp. 541 541 541 541 515 Temp. of feed water 280.6 277.1 276.9 258.3 237.4

4.6 Resistance to boiler steam, water, fuel gas , air resistance of boiler proper: 4.6.1Steam/water resistance (B-MCR): Primary steam resistance 1.37 MPa Secondary steam resistance 0.18 MPa Water resistance of economizer (pipe to drum included) 0.369 MPa 4.6.2fuel gas/air resistance (B-MCR): Boiler gas/air resistance (from furnace outlet to economizer)

2900Pa

Burner PA resistance 1960Pa Burner SA resistance 1000Pa PA resistance of APH 1050Pa SA resistance of APH 850Pa

4.7 Features of Fuel as below

No. Item Symbol Unit DSG'D Coal type Worst

Coal Type Range of Change in Coal Quality

1 Carbon content as received basis Car % 47.65 45.2 41.2549.4 2 As-received basis hydorgen Har % 3.36 3.15 3.3754.55 3 As-received basis oxygen Oar % 14.49 11.7 716.25 4 As-received basis nitrogen Nar % 0.77 0.70 0.3750.975 5 As-received basis sulfer Sar % 0.23 0.25 0.10.23 6 As received basis ash content Aar % 3.5 4 36 7 As received basis total moisture Mar % 30 35 2535 8 Water content as air dried basis Mad % 20 25 1525 9 Dry ash-free basis volatile component Vdaf % 50 46 4267.8 10 Fixed carbon content as received basis FCar % 30 -- 2842 11 Low heat value as received basis Qnet,ar KCal /kg 4200 3900 39004500 12 Grindability coefficient HGI 45 45 45-65 13 Fineness of pulverized coal R90 % 32 14 Ash fusing point (1) Deformation temperature DT C 1150 1150 1150 (2) Softening temperature ST C 1200 1200 1200 (3) Fusion temperature FT C 1300 1300 1300



5. Tools, Instrument for Commissioning 5.1 Walkie-alkie 5.2 Handheld vibration meter 5.3 Temperature measurement meter.

6. Prerequisite for Commissioning Prior to system commissioning, the commissioning personnel shall perform complete inspection upon the prerequisite for system commissioning according to Appendix 1 (Commissioning Condition Checklist) and enter the result of check on records accordingly.

There are turn over packageTOPfrom construction that mention construction already finish and ready to be commissioned. Please see Appendix 1 Commissioning Condition Checklist.

6.1 Conditions that must be available with machinery provisions

6.1.1 Temporary pipeline system for blowing

(1) Completion on installation and heat insulation of the temporary pipeline (including such work as drainage and heat insulation);

(2) Completion on installation and commissioning for the temporary motorized valve, bypass valve and drainage valve;

(3) Completion on fabrication and installation for target device, with sufficient target;

(4) Being qualified for on/off test of the motorized valve and the test for the lighting and signal

(5) Completion and qualification on installation of the counter-force support and fixing and sliding hanger for the temporary pipeline;

(6) Completion on fabrication and installation of the grain collector;

(7) Completion on installation and calibration for the pressure gauge and thermometer installed for the temporary system of blowing.

6.1.2 Flue-gas and air system

(1) The air pressure test of boiler is completed and qualified through acceptance.

(2) Completion on installation and heat insulation for boiler proper as well as flue-gas and air duct

(3) Completion on single commissioning for IDF, FDF, primary fan and air preheater and commissioning of subsystem;

(4) Completion and qualification on inspection and adjusting for each damper and baffle

6.1.3 Flame detecting system

(1) Completion on single commissioning of the cooling fan and interlock protection test as well as qualification on acceptance

(2) Qualification on static commissioning for flame scanner;

(3) The commissioning of the CCTV system is complete and it can be put into operation at any time.

(4) Qualification on commissioning for the flue-gas temperature probe of the boiler;



6.1.4 Electrostatic precipitator system

(1) Completion on installation and heat insulation for electrostatic precipitator as well as qualification on acceptance;

(2) Qualification on air distribution test as well as pressure rising and vibration test for the electrostatic precipitator

(3) Completion on installation for heating device of dust hopper for the electrostatic precipitator and qualification on inspection and acceptance

6.1.5 Fuel oil system

(1) Completion on installation and heat insulation for oil storage and boiler fuel oil system and completion on single commissioning;

(2) Completion on water pressure test for the boiler fuel oil system and qualification on being flushed by water and being blown by steam;

(3) Completion on installation and blowing for steam blowing pipeline of fuel oil system as well as completion on commissioning for each blow down valve

(4) Completion on commissioning for each motorized and pneumatic valve of fuel oil system as well as qualification on acceptance;

(5) Qualification on simulation test for each interlock protection (MFT and OFT) of fuel oil system;

(6) Completion on extending and withdrawing test for each oil gun and high-energy igniter;

(7) Completion on static commissioning for each flame check

6.1.6 Boiler proper

(1) Completion on installation and heat insulation for boiler proper as well as qualification on acceptance;

(2) Completion on water pressure test of boiler and qualification on acceptance;

(3) installation and heat insulation for such systems as drainage, air vent, regular discharging, continuous discharging, bottom heating and nitrogen charge and completion on commissioning for each motorized valve as well as qualification on acceptance;

(4) Installation for water pressure block plate of the main steam pipeline at oulet of the superheater is completed to be applicable for the water pressure prior to ignition of boiler;

(5) After the water pressure test, the valve cores of water pressure for each safety valve of drum and superheater are removed to restore to formal conditions and meet the requirement of manufacturer. The water pressure block plate of steam and water system should be removed.

(6) The spring hangers for each steam and water pipeline are complete and perfect and pins are removed so that they are in conditions of free-bearing capacity.

(7) Qualification on commissioning for the motorized and pneumatic valve for each steam and water pipeline;

(8) The parties inspect expansion system for boiler proper jointly to conform that there is free of barrier and expansion; each expansive indicators should be complete and be adjusted to zero;

(9) The ladders, platforms and the handrails of the boiler proper should be complete, the



illumination should be sufficient; the boiler proper should be clean;

(10) After completion of pickling for the boiler, the inner of drum should be clean, the inner devices should be returned to normal, the drum should be sealed, the temporary facilities should be removed and the formal system has been restored.

(11) The water level gauge of the drum should be installed properly; the commissioning for water level through CCTV system is completed and can be put into operation at any time.

(12) The sampling and dosing devices for the boiler water are installed properly and qualified through inspection.

(13) The installation and heat insulation work for water supply, desuperheating water and the emergency water spray system are completed; they are qualified through water washing; the commissioning for the motorized and pneumatic valves is completed. The installation and heat insulation for the temporary back-washing pipeline of the desuperheater are completed; the qualification is made via inspection and confirmation.

(14) Each manhole door and inspection hole door for the boil body should be complete and sealed.

(15) The cold inspection for installation of the boiler burner and the cold commissioning for flame check are qualified as well as are ready for use.

6.1.7 Deashing system

(1) The installation for the slag pit at the bottom of boiler (including the wind seal at the bottom of boiler), slag depot and the rotary equipment is completed and is qualified through acceptance.

(2) The commissioning for each single equipment of deslagging system is completed, the on/off test for the hydraulic shut-off valve is qualified and they are ready for use.

(3) The installation and commissioning for dedusting system equipment are completed.

6.1.8 Soot blower system

(1) Completion on installation and heat insulation for boiler proper, soot blower of convection funnel and pipeline;

(2) Completion on installation and commissioning for the motorized and pneumatic valve on the pipeline for the steam source of soot blower;

(3) After completion for soot blowing operation test of air preheater, it can be put into use at any time.

6.1.9 Coal pulverizing system

(1) Completion on installation of coal pulverizing system and heat insulation;

(2) Completion on the single damper commissioning of coal pulverizing system.

6.1.10 Air heater system

(1) Completion on installation and heat insulation

(2) The single commissioning is completed and it is ready for use;

(3) Qualification on interlock protection test for system

6.1.11 Compressed air system

(1) Completion on single and sub-system commissioning for instrument and service air



compressors;

(2) Completion on installation for instrument and service air tanks and qualification on calibration of safety valve;

(3) Qualification on blowing for instrument and service air pipelines;

(4) Qualification on interlock protection test for system

6.1.12 Fire fighting system

(1) Completion on installation of firefighting system

(2) Completion on each firefighting facility and qualification on water draining test and being standby state

(3) Completion on the firefighting appliances in the control room, electric room and fuel oil system

61.13 Industrial water system

(1) Completion on installation of industrial water system and qualification on water pressure test

(2) After the trial run for the industrial pump and the industrial water subsystem is completed, the operation can be made at any time.

6.1.14 Auxiliary steam system

(1) After the installation and commissioning for the boiler are completed, it can be put into service.

(2) Completion on installation and heat insulation for each auxiliary steam system

(3) After the qualification for the motorized valve for the auxiliary system is confirmed, the operation can be made.

6.1.15 Isolation between relevant utilities and 2# unit

6.1.16 Chemical water preparation system

(1) The chemical water system is provided with the condition of continuous water supply.

(2) Completion on trial run for water charging system

6.1.17 Requirement for steam turbine discipline

(1) The condenser and hot water well are qualified through cleaning; the condensing pump is qualified through trial run; the system is qualified through flushing; the water supply can be made towards the deaerator;

(2) After the inner of the deaerator is clean and flushed with water and the steam heating pipeline is blown, it resumes to normal conditions and the heating and the operating conditions are provided;

(3) The trial run for the electric feed water pump is qualified; the feed pipeline is qualified by flushing of the entire system; it resumes to normal conditions and has ready for normal operation. ;

(4) Various measures to prevent steam from entering the turbine have been taken and the qualification of acceptance has been made through inspection;

(5) The commissioning work for the vacuum system of steam turbine is completed and the normal operation conditions are provided;



(6) The commissioning work for lubrication oil, sealing oil and jacking oil system for the steam turbine is completed; the turning system is ready for normal operation;

(7) The main steam pipeline of steam turbine, reheating system and the high and low pressure bypass drain valve are confirmed to be qualified and can be put into operation;

(8) After commissioning and inspection for the temperature measuring points of the steam turbine cylinder are completed, the temperature of the cylinder can be shown correctly;

(9) Each electric steam extraction interception valve is confirmed to be qualified and closed strictly;

(10) The drainage for each condenser introduced is isolated reliably;

(11) The spray for low-pressure cylinder can be put into operation.

6.2 Conditions that must be available with electrical and I&C

(1) The static test for boiler FSSS (only fuel oil part) is completed, including:

1) Completion on interlock test for flame check cooling fan;

2) Completion on inspection and test for blowing condition of furnace;

3) Completion on MFT test and the interlock test after MFT;

4) Completion on OFT test of fuel oil and the interlock test after OFT;

5) Completion on fuel oil leakage test;

6) Completion on combustion management system for each oil gun;

(2) Completion on sequence control, interlock and protection test (SCS part) of auxiliaries, including:

1) Start conditions, trip conditions, programmed start and programmed stop for air preheater ( A/B);

2) Start conditions, trip conditions, programmed start and programmed stop for induced air fan (A/B);

3) Start conditions, trip conditions, programmed start and programmed stop for forced draft fan (A/B);

4) Start conditions, tripping conditions, programmed start and programmed stop for primary air fan (A/B);

5) Start conditions, trip conditions for sealing fan (A/B);

(3) The static test for DAS system is completed; the installation for the temperature measuring points of each metal wall of heating face for boiler is completed and qualification is made through cold state inspection and acceptance as well as the original record has been made by the professionals; the project commissioning work related to DAS system and blowing work is completed, with accurate and reliable indication, such as: pressure of drum, superheater, reheater, steam temperature, wall temperature, water supply pressure, temperature, water supply flow, electric contact water level gauge, furnace flame CCTV, negative pressure meter of furnace, flue-gas temperature probe of furnace, secondary air, air flow of primary air, air pressure and temperature, steam water and the flue-gas and air system as well as other measuring points of all I&Cs, fuel pressure, fuel temperature, air flow meter, current of each auxiliary device, temperature of bearing and vibration of bearing. All above must be put into operation properly.

(4) The commissioning and transmission for various protection, alarm and acoustic and light



signals of alarm window are completed and the normal alarm can be made.

(5) The safety power supply is ready for use.

(6) The two- way power supply for DCS can be put into service normally.

(7) The control chart for the steam blowing system of unit is drawn from DCS. DAS system is used for the data acquisition during blowing; prior to ignition of boiler, such works as the system connection, parameters configuration and print commissioning are completed according to the parameters listed in the table below.

Drum pressure Pressure upstream of grain collector

Pressure for superheated steam Temperature upstream of grain collector

Inlet pressure for reheated steam Pressure downstream of grain collector

Outlet pressure for reheated steam Exhaust steam pressure for the temporary pipe

Temperature of superheated steam Exhaust steam temperature for the temporary pipe

Reheat steam temperature Feed water flow

6.3 Conditions that must be available with civil construction

(1) The roads within the commissioning site must be free of obstructions. There is adequate lighting and reliable emergency illumination

(2) The communication equipments on the commissioning site are convenient and available to guarantee the communication is smooth. There are sufficient fire fighting appliances.

(3) After the air conditioning system is debugged properly, it can be put into operation to meet the requirement of computer equipments.

(4) After the installation and commissioning for the elevator of boiler is completed and qualified via acceptance, it can be put into use.

6.4 Other conditions required

(1) The joint inspection is organized for such related aspects as the construction, building, Owner, production and commissioning and the problems found should be solved completely. The ignition condition is confirmed to be provided.

(2) The preparation for the production commissioning is completed and the operators are provided in completeness and qualified via the training and examination. The operation regulation and the system diagram are reviewed; the operation tools are prepared reasonably and the operation log is prepared properly.

(3) The chemicals and materials for commissioning are prepared properly; the sufficient chemical water, fuel and fire coal in compliance with the design requirement should be prepared.

(4) The maintenance tools and materials required are prepared.

(5) The command and organizing system for trial run is perfect and the division of work is defined clearly.



7. Measures for Commissioning Organization This procedure shall be executed under the organization of commissioning contractor. The construction contractors shall cooperate closely with each other according to their respective work responsibilities so as to guarantee safe and effective implementation of commissioning. The division of works is as follows:

7.1 Responsibilities of Commissioning Contractor

Preparation and revision of commissioning procedures; Preparation of commissioning plan; Preparation of instruments and equipment required for commissioning Hold technical disclosure meeting for commissioning; Organize the commissioning work to be carried out by various parties; Give instructions to operators in the operation; Prepare commissioning report.

7.2 Responsibilities of Installation Contractor

Be responsible for individual commissioning of equipment and provide relevant record and certificate of commissioning;

Be responsible for inspection, maintenance and defect elimination of equipment under commissioning

Prepare maintenance tools and materials necessary for commissioning Assist the commissioning contractor in the commissioning of subsystems Be responsible for temporary coordination of local control and instruments and

connection terminals.;

Be responsible for the fabrication and installation for target board and grain collector; Be responsible for the isolation work and the temporary listing work for relevant

systems and equipments

7.3 Responsibilities of Equipment Manufacturers

Representative of manufacturer, if present on the site offering service, shall provide technical assistance during equipment commissioning.

7.4 Responsibilities of Operation Department

Prepare tools to be involved in operation; Prepare operation log and forms; Operate the system and equipment according to the operating procedures and the

instructions of the commissioning personnel;

Be responsible for patrol inspection, check, and normal maintenance of system and equipment;

Be responsible for dealing with the accidents occurred in commissioning



7.5 Responsibilities of Dongfang Electric Corporation

Be responsible for supervision and control over commissioning work; Coordinate with commissioning contractor, the Owner, and other contractors in the

commissioning.

Participate in and witness the commissioning work; Organize analysis and settlement of major technical issues in commissioning

7.6 Responsibilities of Project Owner

Supervise the execution of commissioning procedures; Witness the commissioning work; Accept the results of commissioning

8. Blowing flow 8.1 The blowing flow for the boiler superheater, main steam pipeline, reheater and reheating

pipeline at the hot and cold section is as follows:

Drum--->superheater---> main pipeline of the main steam pipe---> branch pipeline of the main steam pipe---> main steam valve (adding the block plate) --- > leading out of temporary branch pipe---> motorized valve for temporary blowing control --->temporary pipe---> reheating pipeline at cold section (adding the grain collector at the boiler side) ---> reheater ---> reheating pipeline at hot section ---> branch pipe in front of combined intermediate valve---> combined intermediate valve (added with the block plate) ---> leading out of temporary branch pipe---> temporary pipe ---> target board machine --->temporary pipe ---> to atmosphere via muffle

8.2 The blowing flow for HP bypass system is as follows:

Drum--->superheater---> main pipeline of the main steam pipe---> HP bypass pipeline---> motorized valve for temporary control of HP bypass blowing ---> HP bypass pipeline --->reheating pipeline at cold section (adding the grain collector) ---> reheater ---> reheating pipeline at hot section ---> branch pipe in front of combined intermediate valve---> combined intermediate valve (added with the block plate) ---> leading out of temporary branch pipe---> temporary pipe ---> target board machine---> temporary pipe---> to atmosphere via muffle

8.3 Blowing flow for desuperheating water system of superheater and reheater (with reference to Appendix):

The flow-measuring device for the first, second and third stage desuperheating water system of superheater is not installed temporarily, which is disconnected at the location of control valve (removal of the control valve) and led out by employing the temporary pipeline respectively to perform blowing and flushing with the steam and water supply for at steam side and water side. The blowing pressure at steam side of the superheater is around 3.0MPa(Blowing for 5 times and 5 minutes once). The waterside flushing can be performed after the water supply pump is started until clear water is drained through blowing. The reheater steam side is blown with the main steam system simultaneously.

8.4 Blowing flow for the main steam system of feedwater pump turbine is as follows:

Drum--->superheater---> main steam pipeline---> HP main steam valve of feedwater pump turbine---> temporary pipe blowing ---> steam exhaust (blowing completion for steam turbine)

8.5 Blowing for the steam source for the steam turbine shaft seal and other pipeline at the steam turbine side:



The content refers to the blowing commissioning procedure at the steam turbine side. The boiler of this project is completed in combination with the steam turbine.

9. Blowing parameters and the qualified standard 9.1 Blowing parameters:

The pressure of drum is 5.5~ 6.5MPa and the temperature of main steam is 350~450 for the blowing of the main pipeline (the specific parameters are determined in conformity with the blowing coefficients from calculation during the process of the actual blowing). The temporary control valve should be opened and the temporary control valve should be closed at the 3.8~ 4.5Mpa of drum pressure. When the control valves are closed fully, the temperature reduction for the saturation temperature of drum is not greater than 42. The blowing parameters are determined as follows according to the blowing coefficient greater than 1.0:

When the temporary control valve is open, refer to the table below for pressure of drum: pressure of drum (MPa)

System Description Trail blowing Formal blowing Target

Main reheating steam system 3.0 3.5 4.0 6.0 6.0

High pressure bypass system 3.0 4.0 -

Steam system for miscellaneous for steam

turbine and feedwater pump turbine

2.0 3.0 3.0

Steam temperaturefor formal blowing, the temperature is 380~ 450; for trail blowing, the temperature is above 350, the exhaust steam temperature is above 180. When the temporary control valve is closed, refers to the table below for pressure of drum: pressure of drum (MPa)

Pressure of drum at the time of starting (MPa)

Pressure of drum at the time of closing (MPa)

3.0 1.6

3.5 1.8

4.0 2.1

4.5 2.4

5.0 3.5

5.5 3.8

6.0 4.0

6.5 4.2



9.2 Criteria of acceptance Under the condition that the blowing coefficient is greater than 1, the maximal grain diameter with the spot impacted on the target board is not greater than 0.5mm, in addition, when the number of visible spots ( 0.2~0.5mm) is not more than 5, third continuous blowing are deemed as to be qualified. Whats more, the number of spots for the second target board should be less than that of the first. The inspection target board is copper board or the aluminum board.

The calculation formula for the blowing coefficient is as follows:

Steam flow at blowing 2steam specific volume at blowing

Steam flow under rated load2steam specific volume under rated load

10. Temporary facility for blowing 10.1 The special -purpose block plate provided by the manufacturer of the steam turbine will be

used to isolate the HP main steam valve from leading to the steam turbine side and led out temporary pipe from the valve cap and the temporary control motorized valve is added. The temporary pipeline is unblocked with the reheating pipeline of cold section at downstream of HP exhaust check valve (If the HP exhaust check valve is not installed, this position is disconnected.)

10.2 The treatment for the intermediate pressure main steam valve is identical to the one of the high-pressure main steam valve.

10.3 The high-pressure bypass valve is not installed; the temporary electric check valve is installed additionally to control blowing.

10.4 The low-pressure bypass valve is disconnected before entering into the condenser, the original valve is not installed, and the temporary pipe is led to the main exhaust steam pipe or the low-pressure bypass valve is not purged, the manual clearing mode is employed for the installation.

10.5 At the straight pipe section of the main exhaust pipe, the target board device is installed additionally.

10.6 The muffler is added at the exhaust, the installation for the muffler refers to the installation of muffler from the manufacturer as well as the operation and maintenance manual. The resistance pressure of muffler is not greater than 0.2MPa.

10.7 The flow device within the scope of blowing is not installed and connected with the short pipe with identical materials and pipe diameter.

10.8 For the temporary pipe purged, except for the pipeline from the target device of the main exhaust pipe to the muffler, the full bottoming with the argon arc welding is made. The sand blasting treatment is made prior to the installation of temporary pipe. The inner of the entire pipe should be clean and inspected by the quality control personnel.

10.9 When blowing the temporary pipe, the secure and reliable supports and hangers should be installed; and the heat expansion of pipeline and the airflow counter-force for blowing should be taken into account.

10.10 The temporary heat insulation is required to be made for the temporary pipe purged.

10.11 At each lowest point for the temporary blowing system, the drain pipeline and the drain valve are installed; the drainage is drained up to the safety place.

10.12 Such drain pipelines as the main steam, reheat steam (at cold and hot section) and HP and LP bypass pipelines are disconnected with the drain flash tank and the temporary special-purpose



drainpipe is connected to discharge to atmosphere.

10.13 The temporary control valve for blowing should be maintained properly and provided with the stop function at the intermediate random position. The operation switch for the temporary valve should be led to the appropriate location of the concentrated control room. In order to heat the pipe and protect the temporary valve, the temporary valve should be provided with the bypass valve (PN>10Mpa, DN=89t>450).

10.14 On the cold section pipe at inlet of the reheater, the grain collector should be added in parallel; at front and back of grain collector, a pressure gauge with 0~2.5MPa should be installed respectively.

Requirement for the technical parameters of the grain collector:

(1) The pressure is greater than 3.0MPa; the temperature is greater than 450 (2) Refers to the attached diagram for the constructional diagram.

10.15 Requirement for the technical parameters of the motorized valve controlled temporarily:

(1) Dg=300Pg16.0MPa, T>450 (2) Fully open/close time should be less than 60 seconds uniformly;

(3) It can be stopped at the intermediate random location

(4) Welding the single- gate valve

10.16 Selection principles for the temporary pipeline

10.16.1 The cross section of the temporary pipeline should be greater than or equal to the one of the upstream pipeline.

10.16.2 Selection of the wall thickness:

(1) The design pressure for the temporary pipeline at the upstream of temporary control valve is P>10.0Mpa and t450

(2) The design pressure for the temporary pipeline from the downstream of the temporary control valve to the HP exhaust check valve is P>4.0Mpa and t450

(3) The design pressure for the temporary pipeline from the intermediate united valve to the exhaust steam pipe is P>1.6 Mpa and t450

(4) Design pressure for the main exhaust pipe is P>1.5Mpa and t450 10.17 Specification for the target:

(1) Material: aluminum

(2) Length: inner diameter for the longitudinal running through pipeline;

(3) Width: 8% of length;

(4) Thickness: 7mm (5) Quantity:60 pieces Requirement for processing: the grinding and polishing treatment must be conducted for the surface of the entire targets.

10.18 On the temporary pipe near the exhaust, a piece of pressure meter with 0~0.6MPa and a piece of thermometer with 0~500 are installed and introduced into DCS system.



10.19 The mechanical treatment for the pipelines that cannot be participated into blowing should be executed, such as the steam lead pipe of the steam turbine or the LP bypass pipeline.

10.20 After blowing is completed, the pipeline is restored and the reliable measures must be taken for avoiding the secondary pollution.

11. Preparation prior to ignition 11.1 Cold state inspection and transmission for the valve

11.1.1 Inspect and accept the electric or pneumatic switch valve as well as record the data below:

Inspect whether KKS code, designation, local position indications, remote operation direction (as well as feedback are correct; the time for valve on/off, test date and signature of person in charge of test. Refer to Appendix 4 for other contents.

11.1.2 Inspect and accept the electric or pneumatic control valve as well as record the data below:

Inspect whether KKS code, designation, local position indications and feedback indications corresponding to upward command of 0%, 50%, 75%, and 100% and downward command of 100%, 75%, 50%, and 0% respectively, test date, signature of person in charge of test. Refer to Appendix 5 for other contents..

11.2 Inspection for interlock protection and alarm (note: the interlock protection test is based on the result of discussion on logical.)

11.2.1 The device power supply shall be located at the test location to inspect the items below:

(1) Start equipment through the computer and feedback on the computer is correct;

(2) Stop equipment through the computer and feedback on the computer is correct;

(3) Emergency button operates reliably

11.2.2 The interlock protection test for the boiler MFT (OFT) refers to the relevant contents in the whole set of commissioning procedure and fuel oil commissioning procedure.

11.2.3 The interlock protection test for the pulverizing system refers to the relevant contents in the commissioning procedure of pulverizing system(if only oil for blowing,cancel).

11.2.4 The interlock protection test for the steam and water system covers:

No. Test item Fixed value Results Signature

1#and 2# recirculation motorized valves for boiler economizer

(1)

while close instruction of 2# recirculation motorized valve give out, after delay 5s, close instruction of 1# recirculation motorized valve give out by means of interlock

(2)

while open instruction of 1# recirculation motorized valve give out, after delay 5s, open instruction of 2# recirculation motorized valve give out by means of interlock

Boiler Steam pressure protection test

(1) When the steam pressure of the steam header is greater than 18.07Mpa, the ERV electromagnetic pressure release valve is opened automatically to relieve the pressure

18.07Mpa

(2) When the steam pressure of the steam header is less than 17.6Mpa



17.6Mpa, the ERV electromagnetic pressure release valve shall close automatically.

Interlock check of the 1# and 2# exhaust motorized valve of boiler superheated steam header

(1) while close instruction of 2# exhaust motorized valve give out, after delay 5s, close instruction of 1# exhaust motorized valve give out by means of interlock

(2) while open instruction of 1# exhaust motorized valve

give out, after delay 5s, open instruction of 2# exhaust motorized valve give out by means of interlock

Interlock check of the 1# and 2# exhaust motorized valve of boiler reheated steam header

(1) while close instruction of 2# exhaust motorized valve give out, after delay 5s, close instruction of 1# exhaust motorized valve give out by means of interlock

(2) while open instruction of 1# exhaust motorized valve

give out, after delay 5s, open instruction of 2# exhaust motorized valve give out by means of interlock

Open/close conditions on the continuous blow down motorized valve and continuous blowdown control valve

(1) After opening the continue blowdown motorized valve, the manual control is allowed to open the control valve

(2)

After closing the continuous blowdown control valve, the interlock close is performed or the manual control is allowed to close the continuous blowdown motorized valve

1# and 2# emergency drain motorized valves for boiler (setting the interlock operation switch)

(1)

The 1# and 2# emergency drain motorized valve shall be closed by means of interlocking, when the drum level falls to below 100MM; high water-level alarm should be performed.

Fall to 100 mm

(2)

The 1# and 2# emergency drain motorized valve shall be opened by means of interlocking, when the drum level reaches 150MM; high water-level alarm should be performed.

Up to 150 mm

Interlock conditions for desuperheating water motorized valve and control valve

(1)

When MFT motion or load is less than 20%, the main motorized valve and motorized sub-valve of overheating system desuperheating water shall be closed by means of interlocking, and all desuperheating water control valves shall be automatically transformed into manual operation and closed by means of interlocking.

(2)

When the first stage desuperheating water control valve for superheater is closed (5%), interlock-open the corresponding motorized sub-valve of the superheater



desuperheating water..

(4)

When the second stage desuperheating water control valve at A side of the superheater is closed(5%), open the corresponding motorized sub-valve of the superheater desuperheating water by means of interlocking

(6)

When the second stage desuperheating water control valve at B side of the superheater is closed(5%), open the corresponding motorized sub-valve of the superheater desuperheating water by means of interlocking

(8)

When the third stage desuperheating water control valve at A side of the superheater is closed(5%), open the corresponding motorized sub-valve of the superheater desuperheating water by means of interlocking

(10)

When the third stage desuperheating water control valve at B side of superheater is closed(5%), open the corresponding motorized sub-valve of the superheater desuperheating water by means of interlocking

(12)

When each stage desuperheating water control valve of the superheater is closed (5%), open the corresponding motorized sub-valve of the superheater desuperheating water by means of interlocking

(14)

When MFT motion or load is less than 20%, the main motorized valve and motorized sub-valve of reheating system desuperheating water shall be closed by means of interlocking, and each desuperheating water control valves shall be automatically transformed into manual



operation and closed.

(15)

When the desuperheating water control valve at A side of the reheater is closed(5%), open the corresponding motorized sub-valve of the reheater desuperheating water by means of interlocking

(17)

When the desuperheating water control valve at B side of the reheater is closed(5%), open the corresponding motorized sub-valve of the reheater desuperheating water by means of interlocking

(19)

When the emergency spraying control valve of the reheater is closed(5%), open the corresponding emergency spraying motorized sub-valve of the reheater by means of interlocking

Main motorized valve of heating steam at the boiler (starting)bottom

(1) Starting is allowed when FBT (furnace bottom temperature) is less than 80 and MFT exists 80

(2) Without MFT, close is made by means of interlock and starting is forbidden.

(3) When drum pressure reaches 0.2Mpa, close by means of interlocking is performed and starting is forbidden. 0.2Mpa

Motorized valve of steam supply pipe from the cold section of boiler reheater to the auxiliary steam main pipe

(1) Starting is allowed when the pressure of cold section of reheater is greater than that of the auxiliary steam main pipe

(2) Close is made by means of interlock and starting is forbidden when the pressure of cold section of reheater is equal to or less than that of the auxiliary steam main pipe

(3) Close is made by means of interlock and starting is forbidden when the load of unit is greater than 70%.



Completed By SEPCTI DEC PLN JASER

Signature

Date

11.2.6 The alarm signal check for the steam and water system covers: No. Test item Setting value results Signature

Water feed and steam drum system

1 Drum water level high1,alarm +100MM 2 Drum water level high2,alarm +150MM 3 Drum water level high3,alarm +250MM 4 Drum water level low1,alarm -100MM 5 Drum water level low2,alarm -150MM 6 Drum water level low3,alarm -250MM 7 Steam drum pressure high, alarm 18.90MPa 8 Feed water pressure high, alarm 19.35MPa 9 Feed water temperature high, alarm 281

Steam superheater system

1 Outlet Wall temperature of Low superheater high(4 point),alarm

474

2 Outlet Wall temperature of front plate high(4 point),alarm

507

3 Outlet Wall temperature of rear plate high(6 point),alarm

560

4 Outlet Wall temperature of superheater high(10 point),alarm

575

5 Outlet steam pressure of superheater high, alarm

17.41MPa

6 Outlet steam temperature of superheater high, alarm

545

7 Outlet steam temperature of superheater low, alarm

535

Steam reheater system

1 Outlet wall temperature of middle reheater(6 point) high, alarm

545

2 Outlet wall temperature of super reheater(6 point) 580



high, alarm

3 Outlet steam pressure of super reheater(6 point) high, alarm

3.59MPa

4 Outlet steam temperature of super reheater high, alarm

545

5 Outlet steam temperature of super reheater low, alarm

535


Signature

Date

11.2.7 Interlock protection test on flue-gas temperature probe and pneumatic oscillating device of burner, including:


Flue-gas temperature probe A(DCS)

(1) Forward, reverse, suspend, reset(ensuring that the advancing and regressing travel is in place)

(2) Repeat(automatic)

(3) Over-load trip, alarm

(4) High temperature, alarm 540

(5) High high temperature, quit automatically , alarm 560

Flue-gas temperature probe B(DCS)

(1) Forward, reverse, suspend, reset(ensuring that the advancing and regressing travel is in place)

(2) Repeat(automatic)

(3) Over-load trip, alarm

(4) High temperature, alarm 540



(5) High high temperature, quit automatically , alarm 560


Signature

Date

11.2.8 Interlocking protection test on pneumatic oscillating device of burner, including:


Pneumatic oscillating lower device group of burner

(1) DCS command is consistent with the one of site feedback(0%, 50%, 100% command)

(2) Site openness is consistent with the actual position

(3) Horizontal position deviation is less than 5%

(4) Automatically adjusting to the horizontal position(50%) after MFT

Pneumatic oscillating upper device group of burner

(1) DCS order is consistent with the one of site feedback(0%, 50%, 100% order)

(2) On-site openness is consistent with actual position

(3) Horizontal position deviation is less than 5%

(4) Automatically adjusting to the horizontal position(50%) after MFT


Signature

Date



11.2.9 Interlock protection tests on flame scanning fan, including:


(1) Stop permissive conditions

1) MFT action has delayed for 12h, or another flame scanning cooling fan is running, air pressure of flame scanning cooling fan is normal (6kPa-8kPa) and furnace temperature is less than 80

6kPa-8kPa

80

(2) Interlock protection

1) Flame scanning cooling fan is in standby state and the other flame scanning cooling fan is out of work

2) The flame scanning cooling fan is in standby state and its low main pipe pressure signal is transmitted

5.5kPa

(3) Operation and standby conditions

1) Any flame scanning cooling fan runs

(4) Check alarm signal of flame scanning cooling fan and its system

1) Outlet main pipe air pressure low, alarm 6.0kPa

2) Outlet main pipe air pressure low 1, alarm(1point) 5.5kPa

3) Outlet main pipe air pressure low 2, alarm(1point) 3.5kPa

4) Outlet main pipe air pressure high, alarm 8.0kPa

5) diffrential pressure of Inlet filer high, alarm 0.5kPa


Signature

Date



11.2.10 Interlock protection test for intermittent bolwdown pit, including:


(1) Draining pump A

1) Interlock starting condition:or When the interlock button is pressed, the draining pump B

in the intermittent bolwdown pit has tripped

When the interlock button is pressed, the draining pump B in the intermittent bolwdown pit has been operated. If the water level is high, it shall be delayed by 20S

1200mm

Button A is selected to press, the water level of intermittent bolwdown pit is high and two pumps have not operated uniformly.

2) Conditions for interlock suspension : or Water level of the intermittent bolwdown pit is low 500mm

Two pumps have operated uniformly, the water level of intermittent bolwdown pit is not low and not high, the Button A is not selected to press

(2) Draining pump B

1) Interlock starting condition:or When the interlock button is pressed, the draining pump A

in the intermittent bolwdown pit has tripped

When the interlock button is pressed, the draining pump A in the intermittent bolwdown pit has been operated. If the water level is high, it shall be delayed by 20S

1200mm

Button B is selected to press, the water level of intermittent bolwdown pit is high and two pumps have not operated uniformly.

2) Conditions for interlock suspension : or Water level of the intermittent bolwdown pit is low 500mm

Two pumps have operated uniformly, the water level of intermittent bolwdown pit is not low and not high, the Button B is not selected to press


Signature



Date

11.2.11 Interlock protection test on flame CCTV, including:


(1) Flame CCTV A

1) Conditions for interlock quit :(or)

Alarm on out of gas supply at flame CCTV A side

Alarm on over temperature at flame CCTV A side 100

(2) Flame CCTV B

1) Conditions for interlock quit :(or)

Alarm on out of gas supply at flame CCTV B side

Alarm on over temperature at flame CCTV B side 100


Signature

Date

Inspect and operate the following system according to the sequence (the specific operation refers to the operation manual on boiler)

11.3 Inspect and operate the cooling water and compressed air system

(1) The circulation water system and the corresponding interlock protection are put into operation;

(2) The demineralization replenishment system and the corresponding interlock protection are put into operation;

(3) The cooling water system of the steam turbine and the corresponding interlock protection are put into operation;

(4) The cooling water system of the boiler and the corresponding interlock protection are put into operation;



(5) The compressed air system and the corresponding interlock protection are put into operation;

11.4 Inspect and operate the high and low-pressure water supply system, feed the water to the boiler, blow and prepare the hydraulic test for boiler

(1) Inspect and confirm whether the system is provided with starting conditions, start the condensation system and feed the water to the deaerator;

(2) Inspect and confirm whether the electric water supply pump and its system are ready for starting. (run the corresponding interlock protection), start a water supply pump;

(3) Confirm that the boiler is ready for feeding and feed the water to the boiler;

(4) Flush the waterside part of the desuperheating water system of superheater;

(5) Inspect and confirm that the boiler proper and its system are provided with the water pressure condition;

(6) After the boiler water feeding is up to the visible water level, confirm that it is provided with the water pressure condition.

11.5 Water pressure test for boiler

11.5.1 Scope for water pressure: rear of water supply console --- economizer---drum and water-cooling wall --- superheater at the block plate of water pressure for the main steam pipeline (the water pressure block plate is required to be installed and removed after the water pressure test is completed.)

11.5.2 Control for water feeding speed

(1) Water feeding flow: 3060 tons/h; (2) Water feeding duration: 24 hours; (3) Temperature for water feeding: 4070C;

11.5.3 After water emits from the air vent fully, close the corresponding air valve.

11.5.4 After all the air valves are closed, pressure rising begins.

11.5.5 Pressure rising speed:

(1) Drum pressure



11.5.8 After the water pressure test is completed, pressure reduction begins. The speed for pressure reduction is equal to or less than 0.50MPa/min.

11.5.9 In the process of depressurization, flush the system below:

(1) Sampling pipeline for superheated steam, saturated steam and boiler water

(2) I&C pipeline for drum pressure and superheated steam pressure

11.5.10 Open the drain valve for the superheater and main steam pipeline as well as the discharge valve for water cooling wall to drain the water.

11.5.11 Dismantle the water pressure block plate of the main steam pipeline

11.5.12 Flush the cold state water of boiler. The watering and draining work of the boiler should be carried out for many times until the boiler water is adjacent to the water quality of demineralization water.

Acceptance on the boiler work condition water pressure test

Test start time Test stop time Test start pressure Test end pressure remarks

Description:

The drum pressure rises up to 17.40MPa, inspect that the system is free of leakage

and shut off the water supply and watering valves as well as lower the rotary speed of water

supply pump to ensure that the outlet pressure of water supply pump is up to 15.00 MPa,

meanwhile, 5 minute timing begins; if the reduction value for the drum pressure is less than

0.50MPa, water pressure test is qualified.

According to water pressure test, the boiler leakage value of whole systems and

advices is less than 0.50MPa, this leakage value is only 0.35MPa, so ensure this water

pressure test is success.


Signature

Date



11.6 Ignition preparation

11.6.1 After receiving the ignition command, perform the preparation prior to ignition according to the operation regulation.

11.6.2 Prior to ignition, the operator should carry out the overall inspection for the equipment and system, the blow command group should organize the related personnel to perform the inspection and test for following items:

(1) Inspect that the clearance of expansion of each position is greater than the specified expansion value, all the expansion indicators should be in zero position and the record should be made properly.

(2) Inspect whether the nozzles of each burner are in the horizontal location.

(3) Inspect the fastening condition of each hanger; all kinds of hangers and suspenders should be secure.

(4) Perform the programmed control test for the subsidiary blowing of air pre-heater.

(5) Perform the operation test for each damper, baffle and motorized valve;

(6) Perform interlock, protection and signal tests and inspect the protective setting value;

(7) The operational test for inspection of the furnace flue-gas temperature probe and starting for the flame-scanning fan.

(8) Operation test for the temporary control door

(9) The appearance inspection for the temporary blowing pipeline; the supports and hangers should be secure and the density should be satisfied not to produce the vibration or displacement arising from the counter force of airflow.

(10) Confirm the water level for the drum is at +200MM; systems such as the sealing for the boiler bottom, deslagging, heating of electric precipitator, draining of boiler and air vent are put into service. Start the oil pump, the stokehole circulation is made for the fuel.

(11) Ensure the compressed air system and water cooling system are put into service;

(12) Start up the water feeding of boiler and ignition. Contact the shift supervisor to supply the steam to the auxiliary steam header.

(13) Operate the heating system of furnace bottom, control the temperature rise ratio 28h and control the upper and lower wall temperature difference of drum40.

(14) Notify the steam turbine to run the lubrication oil system and the jacking oil system as well as the barring device;

(15) Prior to ignition, start up the bypass valve of the temporary control valve and the drainage relevant with the blowing system to avoid water impact accidents.

(16) Operate the sealing system for the boiler bottom and establish the sealing.

(17) Inspect the lubrication oil station of the preheater and start the operation of the oil station (the oil pump is in the standby state and to be started);

(18) Inspect the cooling fan system of the induced draft fan and run the cooling fan and the interlock.

(19) Inspect the lubrication oil station of the forced draft fan and run the oil pump and the interlock.

(20) Inspect the preheater, induced draft fan and forced draft fan and confirm that they are ready for starting.



(21) Operate the flame scanning cooling air system and the interlock.

(22) Inspect the SCS system to ensure that such interlock protection for the pre-heater, induced draft fan and the forced draft fan is in operation state.

(23) Inspect the BMS system to ensure that the management system for boiler burning is in operation state.

(24) Run flame and water level CCTV;

(25) Inspect and confirm the fuel system and put into operation.

(26) Inspect and confirm that the I&Cs are ready for use.

(27) In accordance with the requirement for the start and operation manual of unit, confirm that each drain valve should be in the correct state prior to ignition.

(28) Open the drainage at different levels for the main steam pipeline at the steam turbine side, the steam-reheating pipeline at the cold and heat section and high -low bypass system.

(29) Properly isolate the system related to the blowing system to ensure the steam of blowpipe is not mixed into other systems.

(30) Open the bypass valve of the motorized valve controlled temporarily for blowing.

(31) After the target device is fitted via the cold state, confirm that it is reliable and available

(32) Confirm that the removal for the water pressure block plate is completed and the system is restored normally.

12. Temperature rising and pressure rising for boiler ignition 12.1 Confirm that the ignition condition is provided to get the approval of the general director for

commissioning. According to the DCS procedure, employ the light diesel to ignite.

(1) Start the flame scanning cooling fan and implement interlock of standby fan.

(2) Suspend the heating system at the bottom and ensure the drum level is at about -100mm.

(3) Start two air preheaters and use interlock.

(4) Start the induced draft fan and forced draft fan.

(5) Establish the airflow for blowing, blowing the furnace for 5 minutes and resetting MFT.

(6) Perform the leakage test for fuel system.

(7) After the leakage test is qualified, blow it once more and reset MFT, adjust the total airflow and the openness of the secondary damper, the pressure difference for the secondary air of furnace is 250~450Pa, the negative pressure of furnace is about -50Pa.

(8) Inspect the openness for all the baffles on the air duct and flue are in proper location.

(9) Confirm that the boiler protection has been inputted fully. If the conditions are not met, the protection should be approved by the headquarter, I&C is cut off temporarily and the record should be made properly. When the protection conditions are met, timely notify I&C to put into protection.

(10) Establish and maintain the boiler fuel pressure within 3.1-3.3 MPa. According to the condition, ignite and start 1~ 2 oil guns; after ignition, take notice to inspect the ignition and atomizing condition and timely adjust the operation condition of oil gun to ensure the favorable atomizing and clear flame, free of black smoke. At the initial stage of ignitions, the oil gun at the lowest layer should be selected to start in opposite angle, the



angles should be switched once as per 30 minutes ( such as: the first and the third angle are tangent towards the second and the fourth corner) to ensure the uniform heating of water cooling wall. When filling the oil, the condition for air distribution should be inspected and the proper adjustment should be made timely to ensure the full ignition; the oil gun with insufficient ignition should be dismantled to inspect and clean; after the ignition fails or the oil gun put out a fire, timely cut off the fuel; after the blowing for the oil gun and furnace ventilation is completed, the re-ignition can be made.

(11) Notify the thermal technician to debug the oil fire check. After the oil fire is debugged normally, the flame check should be started immediately.

(12) After the ignition is normal, the flue-gas temperature probe at the furnace outlet shall be used. When the steam fails to get through the reheater, the flue-gas temperature at the furnace outlet controlled shall not exceed 538 during pipe blowing. If the flue-gas temperature exceeds 538, fuel quantity should be reduced timely to ensure the safe operation of the reheater.

(13) Other oil guns should be commissioned continuously, and the combustion adjusting work and the fire check commissioning work should be carried out. After the oil burner functions normally, the standby one will be out of service immediately.

(14) The auxiliary steam blowing for the air preheater should be started uninterruptedly.

(15) Based on the temperature rising and pressure rising speed, it is required to increase the oil gun additionally. The temperature rising and pressure rising speed shall be controlled in compliance with the temperature/pressure rising ratios for boiler water saturation, referring to the table below:

Main steam pressure MPa 0.98 0.98--3.92 3.92--9.8 9.8--18.2Temperature rising ratio/h 28 56 30 36 Pressure rising ratio MPa/min --- 0.03 0.05 0.06

(16) When the boiler starts up for the first time, it is noticed specially to monitor the expansion conditions in each position. The dedicated person is required to record the expansion for installing and operation. The expansion time is recorded: prior to boiler water feeding and after feeding; the drum pressure at the stage of ignition and pressure rising refers to 0.49 MPa, 1.47 MPa, 2.45 MPa, 3.43 MPa, 4.20 MPa, 5.86 MPa and 6.50 MPa. If the expansion is affected or the expansion is abnormal, the report should be conducted to suspend the pressure rising, after the abnormity is eliminated by taking the measures via negotiation, the pressure rising can be performed continuously.

(17) The temperature difference for the upper and lower wall of drum should be controlled up to be less than 40 .

(18) When temperature is rising and the pressure is rising, open the related drain valve as well as monitor and maintain the pipe wall for the super heater and reheater not overheating.

(19) When the drum pressure rises to 0.2MPa, shut the drums and the air valve for the super heater at different levels and shut all atmospheric relief valves.

(20) When the drum pressure rises to 0.3-0.5MPa, flush the local water level gauge of drum. The Contractor flushes the instrument tube, sampling pipe and hot spring bolts.

(21) In the process of temperature and pressure rising as well as pipe blowing, the quality of boiler water should be controlled. Based on the analysis for the chemical water quality



of the boiler, the sewage discharge shall be performed to improve the boiler water quality. Therein, the sewage discharge should be performed regularly and the program control should be used as possible.

(22) When the drum pressure rises to 0.5-1.0MPa, close the drain valve beside the boiler as well as arrange the chemical dosing system and continuous drainage work regularly, strengthening the drainage of grain collector.

(23) When the drum pressure rises to 1.0MPa, open the bypass valve of control valve to warm the pipe. When warming the pipe, the expansion condition for the pipeline and the stress condition for the supports and hangers should be inspected, especially for inspecting the strictness of block plate for the high and medium pressure main steam valve as well as the expansion and stress condition of temporary system. If the problems are found, timely report it and take the measures to cope with it.

(24) When the drum pressure rises to 3.0MPa, the temperature of super heating steam is greater than 350 and the exhaust temperature of the temporary pipe is greater than 180 , the trail blowing work for the first time can be carried out.

(25) After steam is generated from boiler and steam pressure is established, strengthen the monitoring for the cylinder temperature of steam turbine. Monitor the turbine-turning device to ensure the continuous operation.

13. Blowing procedure 13.1 Trail blowing

Prior to the formal blowing, four trail blowing tests with drum pressure of 3.0MPa, 3.5MPa, 4.0MPa and 4.5MPa shall be performed to inspect the safety and operation of the whole blowing system. The operators and the operators for the control valve should seek for the operation skill and master the control method for water level to ensure the accurate display for the water supply flow.

When performing the trail blowing every time, sufficiently warm the pipe and strictly inspect the expansion and stress conditions, after the expansion and stress conditions for the system (including the temporary system) are confirmed to be normal, the formal blowing can be performed. During the trail blowing, if the problems are found, timely report and eliminate them. If the major problems are found, timely report them, shut off the temporary control valve and break off the power supply as well as stop blowing; after the measures are taken to demolish the hidden troubles, perform the trail blowing again.

(1) When the drum pressure rises to 3.0MPa, the first time trail blowing shall be performed. Open the control valve of blowing and close it after full open.

(2) Inspect whether the heat expansion and the stress of bracket are normal for the blowing pipeline system, after the normality is confirmed, the pressure rising is made again to prepare the purge next time. Otherwise, the pressure rising is suspended to treat the problems on heat expansion and stress of bracket.

(3) When the drum pressure rises to 3.5MPa, the second trail blowing shall be performed. When performing the second trial blow, add a piece of target on the target device to show the original state of pipeline system.

(4) Inspect whether the heat expansion and the stress of bracket are normal for the pipeline system of blowpipe, after the normality is confirmed, the pressure rising is made again to prepare the purge next time. Otherwise, the pressure rising is suspended to treat the problems on heat expansion and stress of bracket.

(5) When the drum pressure rises to 4.0MPa, the third trial purge shall be carried out.

(6) Inspect whether the heat expansion and the stress of bracket are normal for the blowing



pipeline system, after the normality is confirmed, the pressure rising is made again to prepare the purge next time. Otherwise, the pressure rising is suspended to treat the problems on heat expansion and stress of bracket.

(7) When the drum pressure rises to 4.5 MPa, the fourth trial blow shall be carried out. Inspect whether the heat expansion and the stress of bracket are normal for the blowing pipeline system, after the normality is confirmed, the pressure rising is made again to prepare the purge next time. Otherwise, the pressure rising is suspended to treat the problems on heat expansion and stress of bracket.

(8) When the drum pressure rises to 5.5 MPa, the formal blow shall be carried out.

13.2 The formal blow at the first stage

Formal blow: the pressure to open the temporary valve is around 5.5~6.5MPa, when the drum pressure is about 3.8~4.2MPa, shut off the temporary valve. The pressure control after the valve closing for blowing every time should be based on the principle that the saturated temperature of drum is not greater than 42. When blowing, start up the pressure of temporary control valve and the pressure of valve closing, the blowing parameters shall be selected according to table 9.1.

(1) The blowing process for pressure reduction belongs to the working condition that the parameters vary violently, the water charging operation for the boiler should be paid attention specially. Prior to opening the control valve, the water level shall be controlled around -50-- -100mm, under the premise of reliable water supply, open the temporary control valve. After the temporary control valves are opened fully, the water charging capacity should be increased gradually; prior to closing the temporary control valve, water charging capacity should be increased, after the temporary control valves are closed fully, the water level shall be changed from the false water level to the true water level, until the water level drops continuously no longer and begins to rise, the water charging capacity can be reduced to ensure that the water charging reaches the normal water level. The water charging temperature should be raised as possible; in addition, the preparation for the water capacity should be sufficient.

(2) In the process of blowing, the date acquisition should be conducted according to the record form prepared previously. It is noticeable that the data acquisition should be complete.

(3) In the process of blowing, more guns of oil layer of BC or DE shall be used according to the combustion condition. After the oil guns are put into operation, the metal temperature of the pipe wall for the super heater or reheater should be monitored strictly not overheating. and the outlet temperature of superheater or the reheater should be confirmed whether to be controlled effectively below 450 . It is prohibited to operate at over temperature.

(4) The blowing coefficients shall be calculated according to the steam flow method to adjust the blowing pressure up to the appropriate value.

(5) After around 20- time blowing is performed, two-time target practice on target shall be conducted; the blowing -down time more than 12 hours should be arranged according to the situation.

(6) Prior to shutdown cooling, blow the following systems: Blowing pipes for each stage desuperheating water of superheater as well as the steam -side pipeline for the emergency spraying system of reheater. About 5-time blowing with duration of 3~5 minutes every time should be performed for each pipeline.

(7) At least 12 hours are required for shutdown cooling. After flameout, great airflow is required to blow the furnace for 5 minutes, sealing the furnace.

(8) During cooling, the following operation should be performed:



1) Heat standby of boiler. Maintain the normal water level; monitor and record the flue-gas temperature at the back-end; prevent the combustion accidents at the back-end and carry out the accident anticipation.

2) Arrange the workers to clear the grain collector;

3) Clear the strainer of the electric water supply pump;

4) Eliminate the defects found at this stage;

13.3 Formal blowing at the second stage

(1) After the system is cooled for 12 hours, the reigniting, pressure rising and pipe warming for the boiler shall be performed.

(2) The trail blow for the drum pressure at 3.05.0MPa shall be carried out to ensure that the system is heated sufficiently to inspect the expansion and stress conditions.

(3) If there is free of abnormity, continuously raise the pressure up to 5.5~6.5 MPa to perform the formal blowing.

(4) During blowing at this stage, alternatively perform the blowing of high and low pressure bypass pipeline blowing as well as the service steam system blowing for the steam system. 4~ 5-time blowing is performed respectively. The manual clearing is performed for the low-pressure bypass pipeline.

(5) Repeatedly perform the formal blowing, until the target is qualified.

(6) Acceptance and appraisal for blowing quality: at the later stage of blowing, inspect the target installing and blowing condition, continuously inspect the target installing; after two-time continuous inspection is qualified via the supervisor, when blowing is completed, and quality acceptance and assessment shall be conducted.

(7) Prior to completion of blowing, strengthen the blowing work at the back end.

(8) After blowing is completed, the great airflow is required to blow the furnace for 5 minutes after the boiler flameout, the furnace should be sealed. The boiler cools naturally. When the drum pressure reaches 0.8MPa, the boiler draining shall be carried out. The draining with pressure and residual drying shall be taken to perform the dry protection.

(9) The steam turbine should keep the turning device operating until the cylinder temperature of steam turbine reaches the shutdown condition for the turning device to shutdown the turning device.

(10) When the boiler is not cooled up to the normal temperature, the normal water level should be remained. When operating, the flue-gas temperature of back-end is required to be monitored and recorded; preventing the combustion accident at the back-end and the accident anticipation should be performed properly.

(11) When the drum pressure drops to the normal temperature, the restoration for the temporary pipeline system can executed via approval.

13.4 Complete trial run record

The main parameters in the commissioning of boiler blowing should be listed in the Record List for Parameters of Boiler Blowing, referring to Appendix 3.

14. Safety Measures 14.1 Safety rules for commissioning

14.1.1 The parties participating in commissioning shall be familiar with and abide by the relevant



safety rules on site, and wear reasonable clothing and appropriate personal protective equipments.

14.1.2 In case of any accident that damages the equipment or hurts person happened or possibly happen during commissioning, suspend commissioning immediately and put the equipment to the lowest energy state. Investigate the cause and take corrective measures.

14.1.3 The parties participating in the commissioning will obey the command of commissioning personnel. In case there is an emergency endangering personal or equipment safety, any person has the right to stop the operating equipment immediately and report to the control room.

14.1.4 In the entire process of blowing, all the professionals should be in post to ensure the safety for the equipment operating.

14.2 Personal Risk and Preventative Measures

Rotating the equipment Injuries might be caused by rotating equipment during commissioning or test. Therefore, special care must be taken during work and do not touch the rotating components with tools or your hand

Failing to wear or misuse the safety helmet When adjusting or testing, injuries and deaths might be caused by the striking of the objects. When entering the production site, properly wear the safety helmet and tightly tie the cap belt. The dangers above the operation region and the falling objects aloft in the periphery should be inspected.

The damage and burn arising from blowing temporary pipeline All the temporary pipelines are required to perform the heat insulation. Prior to blowing, the pipeline should be warmed sufficiently to avoid the water attack accident, and at 40%50% and 70%80% of blowing pressure , trail blowing shall be performed in several times.

Steam scalding and noise pollution at the exhaust of blowing

The safety isolation measures should be taken strictly at the exhaust of blowing, the dedicated person should be designated.

The mis-operation for the temporary control valve shall lead to the damage of equipment and the personnel injury.

Hang the operation prohibiting plate; strictly execute the power failure rule when replacing the target. For each blowing, the installation contractor must execute it after the personnel withdrawal.

Strictly follow operation procedures, adhere to operation approval system and never carry out work not approved

The high- temperature flue gas emitted from the observation hole and manhole door can hurt the person.

All the manhole doors and observation holes are sealed and closed respectively. Prior to observing the fire on site, appropriately raise the pressure of furnace. When observing the fire, stand on the side of observation hole and prepare to evacuate at any time.

14.3 Equipment Risk and Preventative Measures

Abnormal running of equipment



If it is found that operating equipment makes abnormal sound or has other abnormal condition, and such problem may not be eliminated, stop such equipment and report to the control rooms immediately.

Accidental fire and fire hazard of fuel oil system When commissioning, prepare the strict firefighting measures; the inflammable and explosive objects should be far way from the periphery of blowing pipeline; the sufficient firefighting appliances must be provided on site

Iginition of the platform for the burner The dedicated person shall be assigned and the temporary firefighting devices shall be placed herein, the telephone or the walkie talkie should be employed to contact with the central control room.

Deflagration at the time of extinguishing due to unstable combustion The extinguishing protection must be used, the coal powder fineness should be controlled reasonably, and the operation and maintenance should be performed elaborately, if the combustion is instable, timely start the oil gun, properly prepare the accident anticipation.

Over temperature and over pressure can damage the equipments and hurt the person. The fuel should be used slowly and stably, the supervising for the wall temperature and the temperature at the place of flue-gas temperature probe should be strengthened. If the combustion ratio is out of control, timely shut down the boiler and prepare the pressure releasing accident anticipation. The outlet pressure of the superheater should be controlled to be not greater than 7.0 MPa, the temperature for the superheater or the reheater should not be greater than 450 .otherwise, the combustion must be weakened and the pressure releasing must be performed.

The combustion of pulverized coal deposits at the back-end damaging the equipment The regular analysis should be performed and the coal fineness should be remained within the specified scope. The combustion adjustment should be strengthened to ensure the favorable combustion. The air pre-heater should be started continuously to perform the soot blowing. After shutdown, the normal water level must be remained; the closed system must be purged with the great air flow, meanwhile, the monitoring for the flue-gas temperature at the back-end should be strengthened, if the problem is found, timely treat it; irregularly inspect the accumulated dust at the convection flue gas pass; prior to starting the boiler once more, the great air flow should be employed to purge the boiler. The dedicated person should be assigned to monitor, the temporary firefighting device and firefighting system placed herein should be in standby state.

Serious water scarcity or overfeeding accident The proper control of drum water level is essential

16Procedure of Boiler Steam Blowing OK(Only Oil)PASSED

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