165 MW COAL POWER PLANT
Technical Description:
Pulverized Coal fired Power Station with 165 MWel / 50 Hz
History
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)
The Unit
The unit was designed to fire local low quality lignite. After the closure of the lignite mining in 1993, the combustion plant of the Unit2 was converted with big technical expenditure for the combustion of the main fuel hard coal. It can be easily rebuilt to lignite firing as it was designed originally.
In summer 2005 the existing catalyst system was enlarged by 3 separate layers of catalysts. From 2006 till 2009 the whole process control system was remade, and the control room of the power plant was fully computerized. Within the framework of the adaptation to the integrated concept of the ICCP-guidelines and to the waste combustion ordinance (AVV) two new limit values for NOx, SO2, CO and dust were determined for the power plant.
Characteristics of the power plant
Building time: 1982 – 1986
Type of plant: condensation plant with fresh water cooling
Electrical output: 160 MW / 176 MW
Fuel: hard coal, heavy fuel oil, biogenic surrogate fuels, conversion back to
lignite is possible
District heating load: 17 MWth installed, up to 80-100 MWth possible
Boiler: single pass once through boiler with intermediate superheater (reheater)
Steam generation: 443 t/h
Live steam pressure: 180 bar
Live steam temperature: 535 °C
IS-pressure: 38 bar
IS-temperature: 535 °C
Combustion installations
Hard coal combustion: 4 bowl mills to transfer auxiliary fuel + 2 beater wheels (originally 4)
Oil combustion: 12 steam atomizing burners
