Sulfur dioxide removal from flue gases with sulfite oxidation inhibition
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United States of America Patent
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Dec 11, 1990
Grant Date -
N/A
app pub date -
Jan 8, 1990
filing date -
Jan 8, 1990
priority date (Note) -
Expired
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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.
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