PROCESS AND APPARATUS FOR PURIFYING WASTE GASES

摘要

Waste gases arising in the combustion process in firing installations are purified by using a heat exchanger (12), through which the highly heated waste gases (17) leaving the firing region first flow. The waste gases (17) are thereby cooled down to such an extent that, in a downstream condenser (13), the temperature falls below the dew point of the waste gases (17), so that the water content in the waste gases (17) is then precipitated with simultaneous binding of the pollutant fraction. The waste gases (17) of reduced pollutant content are then fed for final purification to a device (16) which sprays these gases with water (18). The purified waste gases (17) then serve in the heat exchanger as coolant for the highly heated waste gases which are fed to the heat exchanger and which come directly from the firing installation and are thus cooled. The purified waste gases heated by this heat exchange step are then discharged into the environment.