Removing sulphur di:oxide from flue gas - by contacting with solid and dissolved alkaline earth metal carbonate, and oxidising and removed sulphite formed

摘要

In removing sulphur dioxide from flue gas by contacting flue gas with aq. agent consisting of solid alkali the earth metal carbonate and dissolved alkaline earth metal carbonate, the aq. agent, after contact with flue gas is oxidised to convert the alkaline earth metal sulphite formed into sulphate and the resulting sulphate is removed before regeneration of the agent by addn. of fresh alkaline earth metal carbonate.