Removal of mercury and cadmium and their compounds from incinera

Details Removal of mercury and cadmium and their compounds from incinera Removal of mercury and cadmium and their compounds from incinera

1995-03-20

1996-10-29

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422169, 422172, 422173, 110235, 423240R, 423240S, 423210, 95134, B01D 5000, C01B 700

Patent

active

055694365

ABSTRACT:
Toxic metal vapor phase compounds, and in particular, mercury and cadmium, are removed from waste incinerator combustion gases by contact with dry alkaline material and dry activated carbon followed by solids separation. The resulting gas is subjected to quench/wet scrubbing with recycle hydrochloric acid solution formed in situ by absorption of HCl from the gas. Blowdown liquid withdrawn from the recycle acid liquor, may be recycled to the incinerator or further treated by neutralization, precipitation, and filtration of the precipitated toxic metals.

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