Flue gas treatment

Details Flue gas treatment Flue gas treatment

1979-05-07

1980-11-18

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423326, C01B 1700

Patent

active

042345472

ABSTRACT:
A process for removing, by absorption, sulfur dioxide from a gaseous mixture such as a flue gas by scrubbing said mixture with an aqueous scrubbing liquor to which a solution of an alkaline reagent such as sodium carbonate is added to maintain alkalinity of the scrubbing liquor. The solution also has dissolved in it a quantity of silica which tends to precipitate when solution is added to the scrubbing liquor. The silica precipitated in this manner tends to form extremely hard solid deposits in the scrubbing device and associated equipment. If a finely divided solid material such as fly ash or solid material obtained from said scrubbing liquor is added to the alkaline reagent solution prior to its use in the process, the silica forms an agglomeration with the finely divided solid material upon the addition of the alkaline reagent solution to the scrubbing liquor rather than forming the deposits in the scrubbing device and associated equipment. This agglomeration may be circulated with the scrubbing liquor with minimum deleterious effect.

REFERENCES:
patent: 2088281 (1937-07-01), Smith
patent: 3989797 (1976-11-01), Brady et al.
patent: 4150096 (1979-04-01), Nelms et al.

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