Modification of magnesium-enhanced lime flue gas desulfurization

Details Modification of magnesium-enhanced lime flue gas desulfurization Modification of magnesium-enhanced lime flue gas desulfurization

1991-11-22

1993-11-09

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

42324308, C01B 1700, C01B 1722

Patent

active

052600459

ABSTRACT:
An improved wet magnesium-enhanced lime flue gas desulfurization system and process are provided. The magnesium-enhanced lime slurry process for removing sulfur dioxide from flue gas to produce gas that is substantially free from sulfur dioxide and calcium and sulfite-containing waste solids is modified to include the addition of process reagents to a separate premix slurry tank which has a controlled, high pH. The addition of slurry formed from the scrubber effluent to the premix slurry tank is controlled to maintain the pH above 10. The premix slurry tank mixture is circulated to a reaction tank for reaction with the scrubber effluent to produce large crystal, easily dewatered waste solids.

REFERENCES:
patent: 3873275 (1975-03-01), Bennett
patent: 3914378 (1975-10-01), Selmeczi
patent: 3919393 (1975-11-01), Selmeczi
patent: 3919394 (1975-11-01), Selmeczi
patent: 4294807 (1981-10-01), Randolph
patent: 4996032 (1991-02-01), Stowe et al.
patent: 5039499 (1991-08-01), Stowe

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