Dewatering of flue gas desulfurization sulfite solids
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.
- Assignee:
- Tennessee Valley Authority
- Patent Number(s):
- US 4454101
- OSTI ID:
- 6309115
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADDITIVES
ALKALI METAL COMPOUNDS
ANTIFOULANTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
ENVIRONMENTAL IMPACTS
EQUIPMENT
EVAPORATION
FLUE GAS
GASEOUS WASTES
MANAGEMENT
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POLLUTION CONTROL EQUIPMENT
REMOVAL
SCALE CONTROL
SCRUBBERS
SCRUBBING
SLUDGES
SODIUM COMPOUNDS
SODIUM SULFATES
SULFATES
SULFITES
SULFUR COMPOUNDS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES
WATER REMOVAL