water and steam flow.ppt
TRANSCRIPT
STEAM AND WATER FLOW IN BOILER
What is boiler
• As per IBR, “Boiler” means any closed vessel exceeding 22.75 litres in capacity which is used expressly for generating steam under pressure and includes any mounting or other fitting attached to such vessel, which is wholly or partly under pressure when steam is shut off:
POWER CYCLE
Major Equipments In Boiler• Boiler pressure parts(Economiser, water
walls ,superheaters, Reheaters)• Water separator, WS drain tank, BCP• APH • FANS (ID,FD,PA,seal,scanner & their ductings)• Boiler mountings• Mills, oil guns and related pipings• ESP, ASH hoppers, Soot blowers
Economiser
Eco o/l
Eco i/tFeed water
Furnace i/t mani
i/t header
Roof i/t mani
Roof i/t hdr
Roof o/l hdr
RW
Passage SW o/l
Passage SW i/l
2ndry pass i/t mani
2ndry rear wall o/l hdr
Water separator
Drain tank
BCP
1ry SH
2ndry SH3ry SH
M.S
1ry Reheater
CRH i/t
2ndry RHHRH
DESUPERHEATER SPRAYDESUPERHEATER
SPRAY
DESUPERHEATER SPRAY
FEEDWATER
WATER + STEAM
STEAM
REHEAT STEAM
Heating surfaces
Water wall (Radiant zone) 4827.1
Water wall (convective zone) 5426.34
Eco 23306
1ry SH 12434
2dry SH 5410
3ry SH 2192
1ry RH 24012
2ry RH 5750
NPL specificationsFollowing data is at 100% BMCR
Main steam flow at SH o/t 2322000 kg/h
Steam pressure at SH o/t 256.2 kg/cm²
Max press. allowed 269.2 kg/cm²
Steam temprature at SH o/t 568 °c
Steam flow at RH outlet 1886288 kg/cm²
CRH pressure at Reheater i/t 62.61 kg/cm²
Max allowable press. At RH 73.4 kg/cm²
CRH temprature at reheater i/t 349 °c
HRH pressure at reheater o/t 60.5 kg/cm²
HRH temprature at reheater o/t 596 °c
Feed water tempratrure at eco inlet 311 °c
THANK YOU