Clear liquor organic acid flue gas desulfurization system

Details Clear liquor organic acid flue gas desulfurization system Clear liquor organic acid flue gas desulfurization system

1996-05-09

1998-06-23

Bhat, Nina

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422172, 422177, 261115, 55223, 55228, 55338, B01D 5000, B01J 804, C10B 1720

Patent

active

057701644

ABSTRACT:
An efficient and cost-effective flue gas desulfurization apparatus for removing sulfur dioxide from waste gases is provided. The apparatus employs a substantially solids-free clear liquor scrubbing liquid and an, organic acid additive capable of maintaining a process pH of 4.5 to 6.0 under inhibited oxidation conditions in the absorber to accomplish sulfur dioxide removal while avoiding scale formation and encrustation. Calcium sulfite relative saturation is controlled to a desired low optimum level by maintaining the circulating calcium ion concentration at a corresponding, optimum low level. A smaller thickener unit area is required to produced calcium sulfite crystals with optimum settling and dewatering characteristics. A reactor system that promotes the formation of small, efficiently dewatered calcium sulfite solids is also provided.

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