Sulfur dioxide scrubbing system

Details Sulfur dioxide scrubbing system Sulfur dioxide scrubbing system

B - Operations, Transporting

01

D

23/349

B01D 53/34 (2006.01) B01D 53/50 (2006.01) C01B 17/16 (2006.01)

Patent

CA 1079030

AN IMPROVED SULFUR DIOXIDE SCRUBBING SYSTEM ABSTRACT OF THE DISCLOSURE The refractory, non-regenerable alkali metal sulfate produced in a regenerative SO2 scrubbing system which uses thiosulfate-rich solutions of the alkali metal SO2 absorbent is removed from the system by precipitation after regeneration of the alkali metal absorbent but before re-entry into the scrubbing circuit, based upon the discovery that the alkali metal sulfate is least soluble in the multi-component solution leaving the regenerator than anywhere else in the entire system. An additional feature of the invention is the recovery of the precipitated sulfate in an odor-free state by washing with a slip-stream of the spent absorbent solution.

253289

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