Process for treating combustion gases

Details Process for treating combustion gases Process for treating combustion gases

1977-10-31

1979-04-17

Vertiz, O. R.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423166, C01B 1700

Patent

active

041500962

ABSTRACT:
A process for removal of particulate material and sulfur dioxide from a gas stream by washing the gas stream in a treatment zone in a wet scrubber by injection of a reactant such as high calcium or magnesium lime to control pH in the range of 6.0 to 8.5. A resultant slurry containing calcium sulfate, calcium sulfite and solids is formed in the scrubber and a controlled quantity of the solids containing slurry is recycled to the scrubber washing zone as part of the washing fluid to aid in co-precipitation by providing nucleation sites for the calcium sulfate and sulfite crystals maintaining an unsaturated calcium sulfate level in the slurry.

REFERENCES:
patent: 3904742 (1975-09-01), Akimoto
patent: 3911084 (1975-10-01), Wall et al.
patent: 3919394 (1975-11-01), Selmeczi
patent: 3980756 (1976-09-01), Dixson et al.
patent: 4002724 (1977-01-01), McKie

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