Chinese Nanjing Captive Coal Fired Power Plant 6.8MW
Design Basis
Design, Engineering, Procurement, Supervision of Installation, and Commission by Nanjing Turbine Power Station Engineering Design Institute (NTCE) of Nanjing China.
1- Boiler system. 2- Steam Turbine system. 3- Generator system. 4- Fuel Conveying system. 5- Lime stone power injection system. 6- Ash & slag handling system. 7- Chemical water treatment system. 8- Water supply & drainage system of power plant. 9- Firefighting system of power plant. 10- Electrical system Control system Ventilation and air conditioning system.
https://youtube.com/shorts/mQQ5BHq6dwQ
Main Technical Index
Total occupied coverage 2.4hm2
Coverage area of each Kw 2m2 /kW
Building coefficient 21%
Site utilization coefficient 38.5 %
Gross Power Generation 6MW
Auxiliary load 0/78MW
Net Power supply 5.22 MW
Gross heat rate 3528.7kcal/kwh
Thermal efficiency for gross power gene 24.37%
Net heat Rate 4052.5kcal/kwh
Thermal efficiency for net power supply 21.22%
Auxiliary load ratio 13 %
Plant total thermal efficiency (NET) 21.2%
Specification of main equipment
Boiler:
Qty 1 set
Model UG-35/3.82
Rated output 35t/h
Main steam temperature 450℃
Main steam pressure 3.82MPa
Feed water temperature 150℃
Flue gas exhaust temperature 145℃
Boiler blowdown rate 2%
Fuel Indonesian/South African imported
Design efficiency 89%
Turbine
Qty 1 set
Model N6-3.43 M
Rated power 6 MW
Rated rotation speed 3000r/min
Rotation direction Clockwise direction (by viewing from turbine to generator)
Initial Steam inlet pressure 3.43MPa（a）
Initial Steam inlet temperature 435℃
Rated initial steam volume 29t/h
Rated steam rate 4.672kg/kWh
Rated heat rate 12406kJ/kWh
Heat recovery system 1 LP Heater +1 Deaerator + 1 HP Heater
Circulating cooling water inlet temperature 30℃
Rated steam exhaust pressure 0.0084 MPa (a）
Unit vibration value ＜ 0.03mm
Noise Level :＜ 85db(A)
Governing mode DEH (Digital- Electro–Hydraulic)
Generator
Qtya 1 set
Model QFW-6.8-2
Rated power 6.8MW
Rated voltage 11kV
Rated frequency 50 HZ
Rated rotation speed 3000r/min
Rated current 446A
Power factor 0.8
Efficiency 97%
Cooling mode air-cooled
Rotation direction Clockwise direction by viewing from the turbine end
level (of stator or rotor) F level
Overload ability 10%
Excitation mode AC brushless excitation
