Technical Diary of Boiler

Page 1 of 23

4×600 MW SEL IPP

Jharsuguda

Technical Diary

Boiler

Page 2 of 23

TABLE OF CONTENTS

SECTIONS PAGE

1.0 BOILER AND AUXILIARIES ............................................................. 3

1.1 GENERAL SPECIFICATION ............................................................... 3

1.2 COAL CHARACTERISTICS ............................................................... 4

1.3 LIGHT OIL CHARACTERSTICS ......................................................... 5

1.4 BOILER MAIN COMPONENT DETAILS ............................................... 6

1.5 INDUCED DRAFT FAN .................................................................. 10

1.6 FORCED DRAFT FAN .................................................................... 11

1.7 PRIMARY AIR FAN ........................................................................ 12

1.8 PULVERIZER ................................................................................. 13

1.9 STEAM AIR HEATER ...................................................................... 15

1.10 AIR PREHEATER ........................................................................... 15

1.11 SOOT BLOWER ............................................................................. 16

1.12 BOILER WATER CIRCULATING PUMP.............................................. 18

1.13 MAIN PARAMETER LIMIT OF NORMAL OPERATION ........................ 19

Page 3 of 23

BOILER AND AUXILIARIES

BOILER AND AUXILIARIES

1.1 GENERAL SPECIFICATION

Boiler is a subcritical reheat, single furnace, single reheat forced

circulation, balance draft, dry bottom, suspension type coal fired boiler. It

is equipped with two 50% capacity primary air fans to supply to primary

coal and hot air, pulverizing system has 6 double inlet and outlet tube

mills, with 5 mills in operation and 1 standby. It has parallel flow burners

in before lower corners. The furnace is tangential firing type with one

layer of light oil gun and three layers of heavy oil guns in every corners of

boiler. The boiler is designed to produce 2028 tones/hour steam at 17.5

MPa pressure and 541®C at MCR capacity with coal having high heating

value of 3300 kca/kg.

NAME UNIT MCR TRL BMCR

Superheated steam flow t/h 2028 1906.1 2060

Superheated steam outlet

pressure

MPa. g 17.5 17.39 17.5

Superheated steam outlet

temperature

0C 541 541 541

Superheated steam

pressure decrease

MPa. g 1.5 1.43 1.5

Reheated steam pressure

decrease

MPa. g 0.2 0.189 0.2

Reheated steam flow t/h 1716 1612 1741. 6

Reheated steam inlet

pressure

MPa.g 3.955 3.706 4.012

Reheated steam inlet

temperature

0C 332.7 325.8 334

Reheated steam outlet

pressure

MPa.g 3.755 3.537 3.812

Reheated steam outlet

temperature

0C 541 541 541

Feed water temperature 0C 282.2 277.9 283.2

Feed water pressure MPa.g 19.49 19.19 19.49

Page 4 of 23

Primary air temperature of

air-pre heater inlet

0C 40.6 40.6 40.6

Secondary air temperature

of air-preheater inlet

0C 37 37 37

Air-preheater inlet gas

temperature

0C 347 343 350

Primary air temperature of

air-preheater outlet

0C 334.4 330 335

Secondary air temperature

of air-preheater outlet

0C 322.8 319.4 323.3

Air-preheater outlet gas

temperature (before

amendment)

0C 134.4 133.9 134.4

Air-preheater outlet gas

temperature (after

amendment)

0C 130.6 129.4 130.6

Pulverizer outlet air

temperature

0C 263.3 255 265

Economizer inlet

excess air

/ 1.2 1.2 1.2

Fuel consumption t/h 428 408.3 433.7

1.2 COAL CHARACTERISTICS

Coal characteristics are as under:

Sl No Item Symbol Unit Designed coal Checked coal

Proximate Analysis

1 High heating value

(HHV)

GCV kcal/kg 3300 2967-3071

2 Volatile matter (dry

ash-free basis)

Vdaf % 22 19-20. 6

3 Total moisture Mt % 11.9 11.5

4 Moisture (air dried

basis)

Vdaf % 1.14 1.13

5 Ash (as received

basis)

Aar % 41.6 43.3-46. 6

6 Carbon Car % 37.5 34.5

Page 5 of 23

7 Hydrogen Har % 2.1 1.7

8 Nitrogen Nar % 0.9 1.1

9 Oxygen Oar % 5.6 5.6

10 Sulfur Sar % 0.4 0.6

11 Grindability index HGI 45-50 45-50

12 Silicon dioxide Si02 % 54.9

13 Aluminum oxide Al2O3 % 25.4

14 Ferric oxide Fe2O3 % 9.3

15 Calcium oxide CaO % 3.6

16 Magnesium oxide MgO % 1.8

17 Sulfur trioxide SO3 % 2.3

18 Titanium dioxide TiO2 % 1.3

19 Potassium oxide K2O % 0.3

20 Sodium oxide Na20 % 0.3

21 Manganese

dioxide

MnO2 % 0.3

22 Ash deformation

temperature

DT 0C 1290 •

23 Ash softening

temperature

ST 0C 1350

24 Ash flow

temperature

FT 0C 1500

1.3 LIGHT OIL CHARACTERSTICS

SL NO NAME UNIT AVERAGE

01 Kinematic viscosity (at 38°C) cst 2.5-15.7

02 Pour point 0C Summer: ≮12

Winter: ≮18

03 Mechanical impurity no

04 Flash point in closed cup 0C >66

05 Sulfur content % ≮1.8

06 Moisture % ≮0. 25 '

07 Ash % ≮0.02

Page 6 of 23

08 Carbon residue mass % ≮1.5

1.4 BOILER MAIN COMPONENT DETAILS

SL NO ITEM PARTICULARS RELATED PARAMETER

1 Steam Drum

1.1 Steam cylinder body length 25756 mm

1.2 Overall length 27794 mm

1.3 Steam drum internal diameter ∅1778mm

1.4 Wall thickness Top half182mm,

Bottom half153mm

1.5 Material SA299

1.6 Cyclone separator quantity 112

1.7 Single separator output 18. 11 t/h

1.8 Normal water level below the drum center line 229 mm

1.9 water capacity 70. 2 t

1.10 Allowable working pressure 19. 90 MPa

1.11 Working temperature 3660C

2 Furnace

2.1 ) furnace Section dimension furnace

(wXd)

18542 X17448mm

2.2 the center of Upper pulverized

coal burners to

21372mm

3 Downer

3.1 Quantity six

3.2 Pipe diameter X wall thickness ∅ 406 X 34 mm

3.3 Material SA-106B

4 Water cooling wall

4.1 Type Diaphragm type

4.2 Circulating water loop 56 ⇧

4.3 Quantity Front/rear wall has 291respectively,

both side wall has 258 respectively.

4.4 Pipe diameter X wall thickness ∅ 51X6.5 mm

Page 7 of 23

4.5 Pitch Broad wise

4.6 Material SA-210C

5 After wrap wall pipe

5.1 Pipe diameter ∅ 63X7.5 mm


6 After Wrap wall roof tube

6.1 Pipe diameter ∅ 63X7 mm

6.2 Pitch 153 mm broad wise


7 Roof tube

7.1 Pipe diameter ∅ 63X7mm

7.2 Pitch 127 mm broad wise

7.3 Material 15CrMoG SA-210C

8 Low temperature super heater

8.1 Quantity vertical 120, horizontal 120

8.2 Pipe diameter Vertical ∅ 63mm

Horizontal ∅ 57mm

8.3 Material 15CrMo SA-210C

8.4 Pitch 153mm broad wise

9 Isolator screen super heater

9. 1 Quantity Every piece has 8

6X8X8=384

9.2 Pipe diameter X wall thickness ∅ 51X7mm, ∅51X8mm, ∅51X9mm

9.3 Material 15CrMoG, SA-213TP-304H,

12Cr1MoVG

9.4 Warning temperature 503 °C

10 Rear screen super heater

10.1 Quantity 32, Every piece has 19

32 X19=436

10.2 Pipe diameter X wall thickness ∅ 57X8 mm, ∅ 51X10 mm

10.3 Material SA-213T91, SA-213TP-347H,

12Cr1MoVG

10.4 Pitch 571.5 mm (lateral)

10.5 Warning Temperature 5790C

11 Finishing super heater

Page 8 of 23


96X6=576

11.2 Pipe diameter X wall thickness ∅ 57X8mm, ∅57X10mm

11.3 Material 12Cr1MoVG SA-213T91

11.4 Warning temperature 5800C

12 Final re-heater

12.1 Quantity 72 Every piece has 12

72X12=864

12.2 Pipe diameter X wall thickness ∅ 63X4mm, ∅63 X 7mm

12.3 Material SA-213T91, SA-213TP-304H

12.4 Warning Temperature 623 "C

13 Platen Re-heater


48X18=864

13.2 Pipe diameter X wall thickness ∅ 63X4mm, ∅ 63X7mm

13.3 Material SA-213T91, SA-213 TP-304H,

12Cr1MoVG

14 Wall radiation heaters

14.1 Quantity 256 (front wall), 260 (rear wall)

14.2 Pipe diameter X wall thickness ∅ 60X4mm

14.3 Material 15CrMoG

15 Super heater first grade attemperator

15.1 Quantity 2

15.2 Type Pipe type

15.3 Installation site low temperature super heater outlet

15.4 Cooling water wellhead Feed water pump booster class

exports 16 Super heater second grade attemperator

16.1 Quantity 2

16.2 Type Pipe type

16.3 Installation site Rear screen super heater outlet

16.4 Cooling water wellhead Feed water pump booster class outlet

17 Re-heater attemperator

17.1 Quantity 2

Page 9 of 23

17.2 Type Atomized spray injector

17.3 Installation site Wall type of super heater inlet

17.4 Cooling water wellhead Feed water pump middle tap

18 Economizer

18.1 Pipe diameter X wall thickness ∅ 51X6.5 mm


18.3 Pitch 138 mm (lateral)

19 Burner

19.1 Type shutter

19.2 Quantity 6X4=24

19.3 Arrangement methods Tangential round layout

20 Oil Gun

20.1 Ignite oil gun type

(Light/ Heavy oil )

Simple mechanical atomization/ steam

atomization

20.2 Oil quantity of each oil gun

(light\heavy oil )

3250/3250 Kg/h

20.3 Oil pressure (light\heavy oil ) 3. 43/1.37 MPa

20.4 Air/steam (light\heavy oil ) 0. 55/0.8 MPa

20.5 Quantity of ignite oil gun

(light\heavy oil )

4/12

20.6 Ignite gun High-energy ignitor

20.7 Input voltage 220-240V (AC)

20.8 Output voltage 2000 V (DC)

21 Drain flash tank

21.1 Type Model DP15 m3

21.2 Capacity 15m3

21.3 Design pressure 16 MPa

21.4 Working pressure 0.15MPa

21.5 Design temperature 400°C


21.7 Manufactured by Jiangsu electric power equipment

manufacture company ltd

LTD 22 Drain flash tank

22.1 Type Model LP3.5 m3

Page 10 of 23

22.2 Capacity 3. 5 m3

22.3 Design pressure 1.6 MPa

22.4 Working pressure 1.4 MPa

22.5 Design temperature 4000C


22.7 Manufactured by Jiangsu electric power equipment

manufacture company ltd

1.5 INDUCED DRAFT FAN

Induced Draft Fan

Type Entrance static

adjustable axial

Quantity 2

Type Model AN 35/V19+4 Design flow 2500128m3/h

Rotating speed 740 r/min Static booster 6180 Pa

Vane wheel Diameter 3550 mm Vane wheel

grade

1 grade

Shaft output 5324kW Efficiency 79%

Blade Adjustable

Extent

-75% ~ +30% Manufacted by Shenyang forced

draft fan company

draft Induced Draft Fan Motor

Type model ZN63-12 Quantity 2

Power 6000kW Current 368A

Voltage 11000 V Rotating speed 1440 r/min

Induced Draft Fan Bearing Cooling Fan

Type Model G9-19N05A Quantity 2

Rotating speed 2960 r/min Power 11 kW

Induce Draft Fan Motor Oil Pump

Type gear pump Rotating speed 1450 r/min

Output power 20 L/min Power 1.5 kW

Voltage 415 V Oil cooler water

yield

1.8 t/h

Page 11 of 23

Lubricating oil

pressure

0.4 MPa Oil cooler water

pressure

0. 35 MPa

Lubricating oil

temperature

25 ~ 400C Oil tank 630 L

Cooling water

temperature

38 °C Oil brand N46

1.6 FORCED DRAFT FAN

Forced Draft Fan

Type Variable moving

blade axial flow

Quantity 2

Type model ASN-2880/ 1600 Design flow 283.5 m³/s

Rotating speed 990 r/min Static booster 4340 Pa

Vane wheel diameter 2880 mm Vane wheel grade 1 grade

Shaft output 1407 kW Efficiency 86.2%

Blade adjustable

extent

10°C ~ 50°C Manufactured by Shenyang forced

draft fan company

Force Draft Fan Motor

Type Model ZN63-12 Quantity 2

Power 1176 kW Current 94 A


Force Draft Fan Pump

Type Quantitative

Plunger Pump

Motor Model Y2-132S-6-B5

Rotating speed 960r/min Power 3 kW

Voltage 415 V Oil cooler water

yield

1.8 t/h

Lubricating oil

pressure

7 MPa Oil cooler water

pressure

0. 35 MPa

Lubricating oil flow lOL/min Oil tank 500 L

Page 12 of 23

1.7 PRIMARY AIR FAN

Primary Air Fan

Type Variable moving

blade axial flow fan

Quantity 2

Type Model ASZ/2062/1250 Design flow 171.2 m3/s

Rotating speed 1490 r/min Static step-up

pressure

14440 Pa

Shaft output 2755 kW Efficiency 86.3%

Blade Adjustable

Extent

100C ~ 500C

(close/open)

Manufactured by Shenyang

forced fan

company

draft

Primary Air Motor

Type Model ZN63-12 Quantity 2

Power 3300 kW Current 181 A


Primary Air Fan Pump

Type of low pressure

oil pump

gear pump Lubricating oil

pressure

0. 4 MPa

Type of low pressure

oil pump motor

Y2-100L2-4-B5 Power 3 kW

Type of high

pressure oil pump

Quantitative

plunger pump

Control oil

pressure

12 Mpa

Type of high

pressure oil pump

motor

Y2-132S-6-B5 Power 3 kW

Oil Pump Motor

Oil cooler water

pressure

0.4 Mpa Oil cooler water

yield

2.7 t/h

Oil tank 1200 L Lubricating oil

flow (low

voltage)

45 L/min

Cooler cooling area 6 m2 Lubricating oil

flow(high

voltage)

10 L/min

Page 13 of 23

1.8 PULVERIZER

Pulverizer Body

Type Model MGS4772 Quantity 6

Effective diameter ∅ 4650 mm Rotating 15. 3 r/min

Effective length 7340 mm Output power 105 t/h

Effective volume 124. 6 m3 Fineness of

pulverized coal

22%

Pulverizer outlet

temperature

75 °C Ball load 127 t

Ball diameter

proportion

and ∅ 30: ∅ 40: ∅ 50

=1:1:1

Manufacted by Shenyang Machine

Tool Group Co. Ltd.

Pulverizer Motor

Type Model ZN63-12 Rated power 2500 kW

Rated voltage 11000 V Rated current 164 A

Weight 11. 25 t Rated rotating

speed

993 r/min

Pulverizer High Voltage Jacking Oil Pump

Max. pressure 31. 5 MPa Flow 2. 5X2 L/min

Normal pressure 16 MPa Rated current 6A

Motor Model Y2-112M-6/2.2 Motor power 3kW

motor voltage 415V

Pulverizer Low Voltage Lubricating Oil Pump

Max. pressure 0. 63 MPa Pump flow 63 L/min

Normal pressure 0.5 MPa Motor power 2. 2 kW

Motor Model Y2-100L2-4/3

Motor voltage 415 V Rated current 6 A

Pulverizer Oil Tank

Capacity 1.6 m3 Heat

interchanging

area

12 m2 X 2

Filter fineness 0.05 mm Heating power 18 kW

Page 14 of 23

Pulverizer Injection Lubricating Device

Oil pressure 0. 63 MPa Atmosphere

pressure

0.63 MPa

Volume of oil tank 8m3

Pulverizer Big Gear Shade Seal Fan

Outlet pressure 0.4 kPa Motor

VOLTAGEpower

415 V

Pulverizer Seal Fan

seal

fan

blast

volume

Two end bearing 410 m3/h Type Model SFG16D-C6B

Two hollow shaft 4375 m3/h Quantity 2

BSOD close 450 m3/h Full pressure 8900 Pa

BSOD open 46 m3/h Working pressure Above 4kPa than

pulverizer inlet

pressure

Rotating speed 1470 r/min

Motor Model YKK450-4w Motor pressure 250 kW

Motor voltage 11000 V Motor rotating

speed

1490 r/min

Rated current 18.7 A

Pulverizer Cooling Water Parameter

Speed reducer 8 t/h Bearing pad 4.6 t/h

Oil station 7.6 t/h Head waters Auxiliary cooling

water

Coal Feeder

Type Model F55 Quantity 12

Type resist pressure

electron weighing belt

type

Coal feeder

output

0~105 t/h

Coal inlet internal

diameter

∅ 1180 mm Coal outlet

internal

diameter

∅ 800mm

Manufactured by Jiangsu saim co. ltd

Coal Feeder Driven Motor

Type Model SA77DV112M4 Motor power 4.0 kW

Page 15 of 23

Cleaning motor

type

SA67DT90L4 Cleaning motor

power (coal feed

distance is 3324

mm )

1.5 kW

Cleaning motor

type

SA67DT90L4 Cleaning motor

power (coal feed

distance is

3324mm ).

1.5 kW

1.9 STEAM AIR HEATER

Type Horizontal type Quantity 02 for each boiler

Inlet air temp 80C Outlet air temp 350C

Dimension (L x W) 4000 x 5300 mm Heating steam

pressure

0.998 MPa

Heating steam

source

Auxiliary steam Heating steam

temp

345.60C

Design steam

pressure

1.6 MPa Design heating

steam temp

3600C

Heat interchanging

area

1024 m2 Steam air heater

heating air

volume

813600 Nm3/hr x 2

Quantity of steam

air heater drain

pump

02 Capacity of

steam air heater

drain pump

4.0 x 103 Kg/min

Drain flash tank

volume

5m3 Drain flash tank

design pressure

1.6 MPa

Drain flash tank

design temperature

300 °C Manufactured

by

Jiangsu thermal

power Co Ltd

1.10 AIR PREHEATER

Model: 32. 5-VI(T)-2200-SMR Type: Three points storehouse half

mode

Quantity: 02 of each boiler Rotor diameter: 14237 mm

Page 16 of 23

Working rotating speed: 1. 0 r/min (high) Total heating area:

800mm heater transfer element: heater

junction 1000 mm, cold junction 300

mm; middle of heater transfer element

800mm

Start rotating speed: 0. 23 r/min (under

drive)

when pneumatic : 0.28r/min

Motor and Others

Main motor type: Y180L-6 B3 Main motor power: 15kW

Stand-by motor type: Y180L-6 B3 Stand-by motor power: 15kW

Rotating speed: 1. 0 r/min (high) , 0.23

r/min (low)

Rotating speed: 970 r/min

Main motor voltage: 415 V Motor rating current: 31.6A

Stand-by motor voltage: 415V Motor rating current: 31.6A

pneumatic motor type: piston-type Pneumatic motor pressure of air supply

source: 0. 4~0.7 MPa

Oil pump Oil pump motor

Type Model: SPF20 Type Model: Y90L-4

Outlet pressure: 0.5 MPa Rotating speed: 1400 r/min

Filter Cooler

Type Model: XU-A100X50 Type Model: ZLC1-0.8L

Nominals flow: 63 Heater exchanging area: 0.4m2

Blockage alarm pressure: 0.35 MPa Cooling water flow: 1-3 m3/h

Interior bypass press difference: 0. 4MPa Cooling water temperature: ≤32°C

Filter accuracy: 50µ Filter nominal pressure: 1.6 MPa

1.11 SOOT BLOWER

Furnace Soot Blower

Type model PS-SB Distance of run 250 mm

Sweep angle 3600C Velocity of travel 510 mm/min

Installation site Around the furnace

(down one floor burner

and up four floor)

Quantity 88

Motor model M2QA71M4B-J4 Motor power 0.25 kW

Voltage 415 V Rating current 0.79 A

Starting current 5.2 A Motor rotating speed 1405 r/min

Page 17 of 23

Output torque 1.71 Nm Steam resources Screen set to

entrance tank

Steam working

pressure

0.8 – 1.5 MPa Steam working temp ≤350ºC

Long Expansion Soot Blower

Type Model PS-SL Distance of run 9300 mm

Blowing ash pipe

rotating speed

24 rpm Soot blower

travelling speed

1440 mm/min

Motor model M2QA80M4B-J4 Motor power 0. 75kW

Motor rotating

speed

1400 r/min Voltage 415V

Installation site Re-heater, super-heater

& economizer

Quantity 32

Half-expansion soot blower

Type model PS-SB distance of run 4550 mm

Blowing ash pipe

rotating speed

24 rpm Soot blower

travelling speed

720 mm/min

Motor model M2QA80M6B-J4 Motor power 0. 55kW

Motor rotating

speed

925 r/min Voltage 415V

Installation

site

Low temperature re-

heater & economizer

Quantity 8

Furnace temperature probe

Type model TS-0 Type no cold type

Quantity of the

temperature

detector

2 Range of

temperature

detecting

0—540ºC

Distance 6300 mm Travelling speed 1440 mm/min

Motor Model M2QA80M4A-J4 Motor power 0. 55 kW

Voltage 415V Rating current 1.50 A

Starting current 5.2 A

Air pre-heater soot blower

Page 18 of 23

Installation site Air pre-heater flue gas

side inlet and outlet

valve

Quantity 4

Steam resources The normal running use

screen again entrance

container (unit startup

use boiler auxiliary

steam headers)

Manufactured by Shanghai

clydebei

chrismann

company

Soot blow steam parameter

Type Model PS-AT Distance 1486 mm

Steam resources Back screen Re-heater

entrance container

Steam

resources

pressure

3.9 MPa

Steam

resources

temperature

364°C Press control

valve back

pressure

2.5 MPa

Press control

valve back

temperature

351ºC Steam

resources

temperature

300~350ºC

Steam resources Boiler auxiliary steam

headers

Steam

resources

pressure

1.0—1.5 MPa

1.12 BOILER WATER CIRCULATING PUMP

Boiler water circulating pump

Type model LUVAc2X350-500/1 Pump and thermal

isolator design

temperature

375ºC

Design pressure 22 MPa Test pressure 33 MPa

Single pump

operate ensure

flow

4002 m3/h Inlet pressure 191.7 kg/cm2

Page 19 of 23

Total pumping

lift

31.5 m Hot\cold NPSH 14 m/ 20 m

Boiler water circulating pump motor

Type model LUV6/41V40-1105 Rating power 400 kW

Rating voltage 11000 V Rating current 34 A

Rated rotating

speed

1470 r/min Starting current 266 A

Start time 1 sec Machine winding

insulation

PE2/PA

Max working

temperature

(alarm/ trip)

60°C/ 65"C Class of

insulation

Y

1.13 MAIN PARAMETER LIMIT OF NORMAL OPERATION

Item

Unit Normal

valve

Alarm Trip

valve

Remark

High

limit

Low

limit

Boiler evaporation

capacity

t/h 1757 2060

Drum pressure MPa 19.0 19.3 18.7

Super heater outlet

pressure

MPa 17.5 17.7 17.1

Super heater outlet

temperature

ºC 541 (+5/-

10)

546 531

Re-heater outlet

press

MPa 3.27 3.6 3.0

Re-heater outlet

temperature

ºC 541 (+5/-

10)

546 531

Drum water level mm ±50 127 -178 +254/-

381

Furnace negative

pressure

KPa -0. 125 +0.1 -0.5 ±1.50

Fuel master pipe

pressure (light oil)

MPa 3.8 4.0 2.5 2.3

Page 20 of 23

Fuel master pipe

pressure (heavy oil)

MPa 1.8 1.9 0.7 0.6

Pulverizer outlet

temperature

ºC 70 75 70 110

Wielding air

pressure

MPa 0.6—0. 8 0.8 0.4

Primary air pressure KPa 12.4 6.23 5.0

Furnace water pump

circulating pressure

difference

KPa 200.0 110.2 68.6

Furnace water pump

motor chamber

temperature

°C 5-60 60 5 65

Seal fan and

pulverizer primary air

pressure difference

KPa >4. 5 4.0 2.0

Two induced draft fan operation parameters limitation

Sl. No. Parameter Unit Normal High

limit

Low limit Trip

1 Motor lubricating oil

pressure

MPa 0.4 0.1 0.05

2 Motor lubricating oil

temperature

ºC 20-40 50 15

3 Oil strainer pressure

difference

KPa 50 150

4 Bearing shaking mm 4.6 7.1

5 Air fan bearing

temperature

°C 90 95

6 Motor bearing

temperature

ºC <80

7 Air fan surge KPa 6

8 Motor winding

temperature

°C 120 130

Page 21 of 23

Three forced draft fan operation parameters limitation


limit

Low limit Trip

1 Control oil pressure MPa 2 8 1

2 Control oil flow L/min 10

3 Control oil temperature °C 20—40 50 15


difference

KPa 50 250

5 Bearing shaking mm/s 4.6 7.1

6 Air fan bearing °C 90 95

7 Motor bearing

temperature

°C 80 95

8 Air fan surge KPa 0.2

9 Motor winding

temperature

°C 120 130

Four primary air fan-operation parameters limitation


limit

Low limit Trip

1 Lubricating oil pressure MPa 0.4 0.6 0.20 0.1

2 Lubricating oil flow L/min 45 25

3 Lubricating oil

temperature

°C 35 50 15

4 Control oil pressure MPa 2 8 1.0


difference

KPa 50 150

6 Bearing shaking mm/s 4.6 7.1

7 Air fan bearing

temperature

ºC 90 95

8 Motor bearing

temperature

ºC 80 95

Page 22 of 23

9 Motor winding

temperature

ºC 120 130

Five pulverizer operation parameters limitation

Sl No Parameter Unit Normal High

limit

Low limit Trip

1 Outlet temperature ºC 70 75 65 110

2 Bearing pad

temperature

ºC 55 60

3 Lubricating oil pressure MPa 0.4 0.63 0.15 0.05

4 Jack bearing oil

pressure

MPa 16 20 13

5 Strainer pressure

difference

MPa 0.35

6 Lubricating oil

temperature

ºC 40 45 30 50

7 Lubricating oil flow L/h 63

8 Motor bearing

temperature

ºC 90 85 95

9 Motor winding

temperature

ºC 120 120 130

10 Sealed air press

difference

KPa 3.5 3 2

The test pressure is 1.25 ~ 1.5 times of pressure bearing parts design pressure

(MPa)

System

Rated working

pressure (MPa)

Normal hydraulic

test pressure (MPa)

Super-hydraulic (MPa)

test pressure

1. 25times 1. 5times

Page 23 of 23

Main steam

system

19.90 19.90 24. 875 29. 85

Reheat 4.5 4.5 5.625 6.75

The water volume table of each component being tested by the hydraulic

pressure test

Components

name

Economi

zer

Boiler Drum Water &

connecti

ng pipe

Super

heater

Re-heater Total

Water

volume (m3)

82 70.2 180 248 240 820.2

Auxiliary vibration exceed below table shall be deemed to be vibration large

(r/min)rated speed 7600 3000 1500 1000 ≤750

Vibration

amplitude (double

vibration amplitude)

40 50 85 100 120

Technical Diary of Boiler

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