Gas separation: processes – Solid sorption – Inorganic gas or liquid particle sorbed
Patent
1992-05-29
1993-11-23
Hart, Charles
Gas separation: processes
Solid sorption
Inorganic gas or liquid particle sorbed
95129, 95134, 95137, 96126, 432 69, B01D 5304
Patent
active
052640132
ABSTRACT:
In this method and this apparatus exit gases to be purified from kiln installations are first of all dedusted in a first filter stage and then in at least one further filter stage they are purified of the NH.sub.x compounds and/or volatile pollutant elements and compounds with at least partial reduction of NO.sub.x with the aid of a carbonaceous filter medium. In order that the filter dust precipitated in the first filter stage can without problems either be re-used in a suitable manner of deposited in simple refuse dumps, the proportion of low-boiling pollutants and pollutant compounds in this precipitated filter dust is reduced by successive method steps in which the said pollutants are evaporated out of the filter dust, the quantities of dust are precipitated out of these vapors and the dedusted vapours are passed through a filter unit containing a carbonaceous filter medium.
REFERENCES:
patent: 4006066 (1977-02-01), Sparwald
patent: 4500327 (1985-02-01), Nishino et al.
patent: 4813978 (1989-03-01), Hirth
Hart Charles
Krupp Polysius AG
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