55 MW COAL POWER PLANT
Technical Description:
Pulverized Coal fired Power Station with 50 MWel / 50 Hz and 10.5 kV output
Characteristics of the power plant:
Fuel: The power station originally was designed to fire local lignite of low quality. Due to the
uneconomic coal production the unit was converted in 1994-1995 to burn import coal by modifying the
firing system. The plant can be easily converted back to lignite firing during relocation.
Building time: Conversion to hard coal firing and major overhaul: 1994-1995
Type of plant: condensation plant with fresh water cooling
Electrical output: 50 / 55 MW
Running hours: approx. 150’000 h
Fuel: hard coal, heavy fuel oil, conversion back to lignite possible
Coal quality: 25-29 MJ/kg, originally for lignite with appr. 10 MJ/kg
Consumtion: approx. 18-20 t/h
District heating load: 10 MWth
Boiler: double pass natural circulation boiler
Steam generation: 190 t/h
Live steam pressure: 90 bar
Live steam temperature: 530 °C
Design-pressure: 108 bar
Starts (cold/warm): 675 (179/496)
Power station and associated infrastructure
The main components of the power plant which will have a footprint of approximately 3 ha include
the following:
- Boiler house and turbine hall for one 50 MW unit
- Flue gas desulphurization plant incl. electrostatic precipitators
- 80 meter high stack
- Auxiliary plant buildings, including administration building and warehouse
- Other operational support buildings
- Maintenance workshops and storage facilities including electrical and instrument workshops and
stores, and machine shop - Laboratory area for both routine testing and specialised analysis and investigation
- Access roads
The associated infrastructure which will have a footprint of approximately 7 ha are as follows:
- In-plant coal stock yard and storage (2ha) – coal is to be conveyed via overland conveyor and
trucks from nearby coal mines. - Lime storage area (500m2)
- Overland coal conveyors – from identified coal discard dumps in the area
- Water supply pipeline (temporary or permanent)
- Amenities including potable water, sanitary and sewer utilities
- Electrical utility interconnection and telephone utilities
- Sewage treatment plant (100m2)
- Access road and internal roads
- Ash disposal facility (2 ha for the first 5 years of operation)
- Ash disposal facility runoff ponds (0.2 ha each)
Water storage reservoir for raw water supply
