METHOD AND DEVICE FOR SEPARATING FINE-GRAINED FRACTIONS FROM THE CINDERS OF A WASTE INCINERATION PLANT

摘要

The method is characterized in that the fine-grained fractions are extracted by means of a gas flow at least at one point in the cinder shaft (4) using a fan blower (8) and a connected pipe (9). The extracted gas is conducted through separators (10, 11) and the fine-grained fractions are separated therein from the gas by means of chemical, mechanical or electrical treatment. The gas which has been freed of the fine-grained fractions is thereafter blown in the same volume back into the cinder shaft (4), such that the gas flow balance and the pressure conditions therein remain unchanged in the upper and lower regions. The device for this purpose consists of at least one pipe connection in the cinder shaft wall to an extraction pipe (9), the outgoing extraction pipe (9) being connected to a fan blower (8) and to at least one separating device, (10, 11) for extracting the fine-grained fractions from the gas. A return pipe (13) is used for feeding the gas freed of the fine-grained fractions back into the cinder shaft (4).