Three (3) 50 MW Coal Fired Steam Turbines, total 150 MW

62.5 MVA
10.5 KV
3000 rpm
50HZ
Year 1994 and 1995
Boiler type single steam natural convection coal dust boiler.
Contact us for information
 

pictures

 

Generator

Model: QFQ-50-2-B
Output: 62.5 MVA
Stator current: 2440A
Stator voltage: 10.5kV
Frequency: 50 Hz
Speed: 3000 rpm
Cooling: hydrogen external cooled
Insulation: class B

Steam Turbine

Model: N50-8.83-1 high pressure, single cylinder, condensing type
Rated power: 50MW
Max power: 55MW (only under certain condition, not for testing)
Speed: 3000 rpm
Steam inlet pressure: 8.83Mpa
Steam inlet temp: 535 ﾟC
Low pressure steam exhaust pressure: 0.0054Mpa (at meter 0.1013-0.0054=0.0959Mpa)
Exhaust temp at load max 65ﾟC
Cooling water temp: normal 20ﾟC, max 33ﾟC
Cooling water flow: 8160T/h
Water inlet temp: 220ﾟC
Total 21 stage (1 adjustable +20 pressure stages), at stage 5,8,11,15,17,19 set non-adjustable steam extraction. At the 5th stage of the steam turbine bottom, there are 2 nos of Ø168 adjustable heat extraction holes, pressure: 1.4Mpa to 2.69Mpa, temp: 337.8 to 400.4ﾟC
Steam turbine with heating system has total steam consumption rate: 193.032t/h, steam consumption
( guarantee value): 3.72kg/kwh, heat rate : 9399kj/kwh

	unit	Adjustable stages	First section	Second section	Third section	Fourth section	Fifth section	Sixth section
Extraction point		Back of stage 1	Back of stage 5	Back of stage 8	Back of stage 11	Back of stage 15	Back of stage 17	Back of stage 19
Extraction steam pressure	Mpa	5.6	2.691	1.385	0.772	0.293	0.131	0.041
Extraction temp	ﾟC	480	390	312	249	156	107	76
Extraction capacity	T/h		12.28	6.83	8.21	6.36	8.85	6.9
Re-heater output temp	ﾟC		220.4	190	158	130	105	75
Re-heater			#2 high add	#1 high add	De-oxygenetor	#3 low  add	#2 low add	#1 low add

Boiler

Boiler type single steam natural convection coal dust boiler, steel structure, reverse U layout.
Model: SG-220/9.8-M298
Date of operation: #3 April 1994, #4 Oct. 1994, #5 Aug. 1995
Maker: Shanghai Boiler Factory
Rated capacity: 220t/h
Saturated steam pressure: 10.78Mpa
Overheat Steam pressure: 9.8Mpa
Steam temp: 540ﾟC
Boiler efficiency: 91.1%

Last major overhaul of power plant:

Turbine #3 Feb, 2004
Turbine #4 Dec, 2007
Turbine #5 Feb, 2005