1. SALIENT FEATURES OF 500 MW BOILER
TYPE OF BOILER:
Single Drum Top supported,
Fusion welded WW Panel,
Controlled circulation system,
Tangential fired, Radiant
Dry Bottom
Pulverized coal fired outdoor
Balanced Draught
Cut corner
51mm OD WW Tubes at 63.5 mm pitch
Rap around Buck stay system
FIRST PASS:
Boiler Furnace Depth mtr
Furnace Width mtr
Height of Furnace (upto Radient roof) mtr.
SECOND PASS:
Depth mtr
Width mtr
Total Height of Boiler- 90mtr.

2. BOILER EXPANSION DETAILS
FIRST PASS:
Vertically Downward Expansion at Ring Header (10.250mtr elev.) : 330mm
Horizontal Expansion at Ring Header
(10.250mtr elev.) : 36mm
SECOND PASS :
Vertically Downward Expansion at Ring Header
(44.060mtr elev.) : 174mm
(44.060mtr elev.) : 58mm

3. BOILER DRUM EXPANSION :
Vertical Downward Expansion at mtr elev.=29mm
Horizontal Expansion at mtr elev.= 53mm

4. BOILER PARAMETERS (BMCR)
STEAM FLOW AT SH OUTLET t/h
PRESSURE OF SUPERHEATED STEAM kg/sq.cm
TEMP.OF SUPERHEATED STEAM C
STEAM FLOW AT REHEATER OUTLET t/h
ENTRY PRESSURE OF REHEATED STEAM kg/sq.cm
ENTRY TEMP. OF REHEATED STEAM C
EXIT PRESSURE OF REHEATED STEAM kg/sq.cm
EXIT TEMP. OF REHEATED STEAM C
FEED WATER INLET TEMP C
FEED WATER TEMP BEFORE ECO C
FEED WATER TEMP AFTER ECO C

5. TEMP.AT LTSH OUTLET C
TEMP.AT S/H DIVISIONAL OUTLET C
TEMP.AT FINAL S/H OUTLET C

6. DESIGN PARAMETERS OF BOILER
BOILER DRUM PRESSURE kg/sq cm
SH OUTLET PRESSURE kg/sq cm
FINAL SH TEMP C
REHEATER OUTLET PRESSURE kg/sq cm
BOILER HYD. TEST PRESSURE kg/sq cm
REHEATER HYD. TEST PRESSURE kg/sq cm

7. HEATING SURFACE OF BOILER
ECONOMISER sq mtr
WATER WALL sq mtr
STEAM COOLED WALL sq mtr
LTSH sq mtr
SH DIVISIONAL PANELS sq mtr
PLATEN SH (FINAL SH) sq mtr
SH ROOF sq mtr
RH FRONT COILS sq mtr
RH REAR COILS sq mtr
TOTAL HEATING SURFACE AREA = sq mtr

8. WATER HOLDING CAPACITY OF BOILER
BOILER DRUM (FULL) : cubic mtr
CIRCULATION SYSTEM : cubic mtr
ECONOMISER : cubic mtr
SUPERHEATER(LTSH,SH Div. Panel, Final SH): 130 cubic mtr
REHEATER : cubic mtr
TOTAL VOLUME : cubic mtr
DM WATER REQUIRED FOR HYD. TEST (DRAINABLE) : cubic mtr

9. SOOT BLOWER DETAILS WALL SOOT BLOWERS : 88 Nos. (FUTURE - 16 Nos.)
(FRONT & REAR AT EACH ELEVATION - 6 Nos. EACH, RHS &LHS -5 Nos. EACH, TOTAL 4 ELEVATIONS)
LRSB : 40 Nos. (FUTURE - 4 Nos.)
APH SOOT BLOWERS :2 Nos.

10. COMPARISON BETWEEN NATURAL & ASSISTED CIRCULATION BOILERS
S/H
S/H
DRUM
DRUM
BOILER
WALLS
BOILER
WALLS
ECO
ECO
CC PUMP
FEED LINE
FEED LINE
RING HEADER
RING HEADER
NATURAL CIRCULATION BOILER (SUB CRITICAL BOILER 30MW-250MW)
DRUM CG. 26 MTR – 58 MTR
ASSISTED CIRCULATION BOILER (500MW) DRUM CG – MTRS
FORCE CAUSING FLOW OF
WATER THROUGH TUBES
F = WCOLD X H1 - W HOT X H2

11. CRITICAL BOILERS OR ONCE TROUGH OR MONOTYPE BOILER
S/H
STEAM
BOILER WALLS
SEPERATOR
WATER
ECO
DRAIN
FEED PUMP

12. IMPORTANT FEATURES OF 500 MW BOILER
C.C. PUMPS
ORIFICE PLATES IN BOTTOM RING HEADER
RIFLED TUBES IN WATER WALLS
DIVISIONAL SUPERHEATERS
ECO LINK CONNECTIONS FROM BOTTOM OF BOILER DRUM
DOWN COMMERS CONNECTION TO ONLY BOTTOM RING HEADER.
ECO RECIRCULATION CONNECTION TO BOTTOM RING HEADER REAR.
2 NOS. TRISECTOR TYPE AIR PREHEATERS.
8 NOS. BOWL MILLS ( XRP 1043 TYPE) & GRAVEMETRIC 36” SIVE FEEDER ( FEEDER LOCATION 21 ML )
4 NOS OIL ELEVATION & 8 NOS. COAL ELEVATION.
2 NOS. I.D FANS, 2 NOS. F.D.FANS, 2 NOS. SEAL AIR FAN, 11 SILENCERS , 20 SAFETY VALVES
HEA INNITERS.
COAL CONSUMPTION – 8400 T/HR.

13. NUMBER OF TUBES & DIAMETERS
DESCRIPTION
NO. OF TUBES / PANELS
DIAMETER OF TUBE
IN MM
RISER TUBES( W/W O/L HDR. TO DRUM)
68 NOS.
159
WATER WALL ( FUSION WELDED )
FRONT-269 NOS., REAR-269 NOS, LHS-212 NOS, RHS-212 NOS. 51
HANGER TUBES
44 NOS.
63.5
SCREEN TUBES
177 NOS.
REAR ARCH
EXTENDED SIDE W/W PANEL
LHS-37 NOS.& RHS-37 NOS.
ECONOMISER
92 X 3 BANKS
38.1
LTSH
62 X 2 BANKS
47.63
DIVISIONAL PANELLETE
6 ASSY. & 8 PANELS i.e. 48 NOS.
44.5
FINAL SUPERHEATER
25 COILS
REAHEATER
FRONT-74 NOS. & REAR 74 NOS. 54
RADIENT ROOF 1ST PASS
150 NOS.
SUPER HEATER CONNECTION TUBES(DRUM TO RADIENT ROOF )
21 NOS.
B.P. SIDE WALL ( FRONT )
60 NOS.
B.P. SIDE WALL ( REAR )
31 NOS.
B.P. ROOF TUBES
126 NOS.
B.P.FRONT SCW TUBE
B.P.REAR WALL TUBE
137 NOS.

14. SAFETY VALVES LOCATION
M.S.LINE
HRH LINE
CRH LINE
DRUM
SAFETY VALVE 2 4 6
ERV (ELECTROMATIC RELIEF VALVE)