Process for removing sulphur dioxide from flue gas

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component

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42324308, 423DIG5, B01D 5350

Patent

active

056908997

ABSTRACT:
Sulfur dioxide is removed from flue gas by scrubbing with sea water and aeration of the sump to convert the removed sulfur dioxide into bisulfate with neutralization in a reaction basin subsequently forming sulfate. The neutralization is carried out by the treatment of sea water and a pH of 4 to 5 and preferably 4.15 to 4.5 is maintained in the liquid phase removed from the sump by controlled recycling of the sump liquid to the absorption zone or addition of further quantities of sea water to the column.

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patent: 4085194 (1978-04-01), Otani et al.
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patent: 4976936 (1990-12-01), Rathi et al.
patent: 5141727 (1992-08-01), Varney
Glenna et al. "ABGas-Entschwefelungsanlage Mit Meerwasser Als Absorptionsmittel" published in Verfahrenstechnik vol. 25, No. 9 (1991, no month) pp. 12 and 13.
Sintef Report No. STF 21 A77098 prepared by Hagen et al., Norway (1978-03-08) "Status Report on the Flakt-Hydro Flue Gas Desulfurization Process (Sea Water Scrubbing)" pp. 1-34 ISBN-82-595-1422-2.

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