Method of purifying the exhaust gases from plants for the produc

Details Method of purifying the exhaust gases from plants for the produc Method of purifying the exhaust gases from plants for the produc

1990-12-31

1992-12-08

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

423239, 42324401, B01D 4700, B01J 800, C01B 2100, C01B 1700

Patent

active

051696118

ABSTRACT:
The invention relates to a method and apparatus for purifying the exhaust gases from plants for the production of cement clinker, in which in a multi-stage filter zone hot exhaust gases coming from a preheating zone are first of all cleaned of dust in a first filter stage and then in a further stage are purified of NH.sub.x compounds, heavy metals and trace pollutants, SO.sub.z and NO.sub.x. In order to achieve a particularly efficient and economic purification, the exhaust gases from the preheating zone are set before the first filter stage to such a filter zone inlet temperature that in this first filter stage at least a proportion of the easily volatile pollutant elements and pollutant compounds are precipitated out of the exhaust gases in addition to the dust.

REFERENCES:
patent: 4454100 (1984-06-01), Faatz
patent: 4783326 (1988-11-01), Srednicki et al.
patent: 4919905 (1990-04-01), Horaguchi et al.

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