Sulfur dioxide removal from flue gases with sulfite oxidation in

Details Sulfur dioxide removal from flue gases with sulfite oxidation in Sulfur dioxide removal from flue gases with sulfite oxidation in

1990-01-08

1990-12-11

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423562, C01B 1700

Patent

active

049769375

ABSTRACT:
A method for removing sulfur dioxide from flue gases in a wet scrubbing system where calcium thiosulfate and calcium polysulfides are formed by the reaction of lime and emulsified sulfur and the mixture added to a recycle tank of the wet scrubber where it reacts with sulfites and bisulfites in the scrubbing slurry to produce thiosulfates from the calcium polysulfides, with the slurry then returned to the scrubber. The mixture of calcium thiosulfate and calcium polysulfides may be formed in the lime slaking tank or lime storage tank of a lime scrubbing system or formed in a mixing tank and added to a lime or limestone scrubbing system.

REFERENCES:
patent: 1336957 (1920-04-01), Hedenburg
patent: 3843771 (1974-10-01), Urban
patent: 3906080 (1975-09-01), Gorin et al.
patent: 3914378 (1975-10-01), Selmeczi
patent: 3919394 (1975-11-01), Selmeczi
patent: 4690805 (1987-09-01), Bhatia et al.
"Thiosulfate Additives for Lime/Limestone Scrubbing", Gary T. Rochelle, et al., Tenth Symposium on Flue Gas Desulfurization, Atlanta, Ga., Nov. 1986.
"Reducing Gypsum Scale in Wet FGD Systems Using Thiosulfate", David R. Owens, et al. POWER, May 1988.

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