Method of removing sulfur dioxide from flue gases, especially po

Details Method of removing sulfur dioxide from flue gases, especially po Method of removing sulfur dioxide from flue gases, especially po

1998-07-10

2000-05-16

Griffin, Steven P.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423547, B01D 5350

Patent

active

060633522

ABSTRACT:
SO.sub.2 containing flue gas is scrubbed with a scrubbing solution made up from ammonia water, untreated ammonium sulfate scrubbing solution recycled from the bottom of the scrubbing zone and ammonium sulfate solution formed by oxidizing a portion of the recovered ammonium sulfite scrubbing solution. The ammonium sulfite/ammonium sulfate mixing ratio is maintained at 15:1 to 3:1. The ammonium sulfite containing scrub liquid in combination with aqueous ammonia and an ammonium sulfate solution which has undergone oxidation can have an unusually high sulfur dioxide absorption capacity while minimizing the formation of aerosols.

REFERENCES:
patent: 3927178 (1975-12-01), Jordan et al.
patent: 4268489 (1981-05-01), Haese

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