Removal of mercury and cadmium and their compounds from...

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

B - Operations, Transporting

01

D

B01D 53/00 (2006.01) B01D 50/00 (2006.01) B01D 53/04 (2006.01) B01D 53/14 (2006.01) B01D 53/34 (2006.01) B01D 53/64 (2006.01) B01D 53/70 (2006.01) B01D 53/81 (2006.01)

Patent

CA 2114331

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 HC1 from the gas. Blowdown liquid withdrawn from the recycle acid liquor, may be recycled to the incinerator or further treated by neutralisation, precipitation, and filtration of the precipitated toxic metals.

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