METHOD AND DEVICE FOR DESULPHURISING SMOKE GAS FROM COAL HEATINGS

摘要

Method for desulphurising smoke gas from coal heatings, wherein coal is burned in the boiler in the presence of an additive, optionally while feeding a cold gas. The partially non-transformed additive leaves the boiler with the smoke gas and is separated with the ashes in dust-retaining filters mounted downstream. The relative humidity of the smoke gas is increased before it enters the dust-retaining filter (23), so that a larger quantity of the sulphur compounds contained in the smoke gas react with the additive in the dust-retaining filters. In the device for implementing said method, a heat exchanger and/or an injection cooler is mounted in the smoke gas stream before the gas filter unit.