Coal-fired power stations are thermal power plants that use lignite or hard coal as a fuel to generate electricity. Flue gas dedusting and desulphurisation are mandatory for power stations fired with lignite or hard coal.
Smaller power stations may to some degree dispense with exhaust gas desulphurisation and need only dedust their flue gases. In larger plants, the flue gas is desulphurised by adding limestone or dolomite directly into the combustion zone (in fluidised bed combustion) or by adding hydrated lime in a dry or semi-dry state up-stream the baghouse.
|Case History: Coal-fired power stations|
|Reference||combined heat and power plant|
|Flue gas cleaning||direct desulphurisation|
|Flua gas temperature||130 - 170 °C|
|Gas volume flow||250.000 m³/h|
|Filter area||3.870 m²|
|A/C ratio||1,06 m/min|
|Emission||< 30 mg/Nm³|
|Filter media||PPS/PTFE PROGRESS|