Dewatering of flue gas desulfurization sulfite solids

Details Dewatering of flue gas desulfurization sulfite solids Dewatering of flue gas desulfurization sulfite solids

1983-06-29

1984-06-12

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

423512A, 423519, C01B 1700, C01B 1745, C01B 1762

Patent

active

044541015

ABSTRACT:
The dewatering capabilities of sulfite sludges from flue gas desulfurization facilities are substantially improved by the addition of relatively small amounts of sodium thiosulfate additive, or additives derived from or related to sodium thiosulfate, into the scrubber slurry liquor. As an added embellishment, these predetermined amounts of said additives are greater than those required for effecting substantial scale inhibition in the scrubber innards. Subsequently, conventional dewatering of the sulfite sludge to about 80 to 90 percent solids directly produces a waste product disposable in both an economically and an environmentally acceptable manner, in that the thixotropic characteristics of such sludges which are associated therewith upwards to about 70-percent solids therein are completely eliminated.

REFERENCES:
patent: 2154996 (1939-04-01), Rawling
patent: 3906080 (1975-09-01), Gorin et al.
patent: 3937787 (1976-02-01), Gorin et al.
patent: 4208395 (1980-06-01), Gorin
patent: 4294807 (1981-10-01), Randolph

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