Treatment of flue gases

Details Treatment of flue gases Treatment of flue gases

B - Operations, Transporting

01

D

23/347

B01D 53/34 (2006.01) B01D 47/10 (2006.01) B01D 53/50 (2006.01) C01B 17/60 (2006.01)

Patent

CA 1156436

ABSTRACT OF THE DISCLOSURE A method for the treatment of an effluent gaseous stream from a Kraft Recovery Boiler or the like. The effluent stream passes through a venturi section where nucleation of the particulates is initiated and larger particles collected. Subsequently, the stream flows from the venturi section with the nucleated particulates and is scrubbed to remove the particulates, TRS and sulfur dioxide. A portion of the bottoms from the packed section is recycled back to the venturi section at 15-25% dissolved solids by weight. The total solids of the liquid stream in the venturi section is maintained at 1-5% above saturation. Further concentration of a slipstream is achieved by cyclonic separation or filtration. The pH in the venturi section is controlled to agglomerate the suspended solids. The bottoms from the venturi section are subsequently concentrated externally to the venturi section to between 40-60% solids.

391632

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