Process for limiting chloride buildup in so2 scrubber slurry

Patent · Tue Dec 28 04:00:00 EST 1982

OSTI ID:6430080

Frabotta, D; Hanson, R W; Rader, P C

In the process of scrubbing flue gas to remove pollutants therefrom by contacting the flue gas with an aqueous reactant mixture of water and pollutant absorbent, water soluble chloride impurities present in the flue gas and make-up water tend to build-up as the supernatent liquor from the spent reactant mixture dewatering cycle is recycled for mixing with unreacted pollutant absorbent to form additional reactant mixture for contacting with the pollutant laden gas. The build-up of chlorides in the reactant mixture is controlled by passing a purge stream of the chloride containing liquor in contact with a hot drying gas so as to evaporate the water and crystallize the chloride impurities in the purge stream. The crystallized particles of chloride salt are then removed from the drying gas as a dry solid.

• Assignee: Combustion Engineering Inc.
• Patent Number(s): US 4366133
• OSTI ID: 6430080
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DESULFURIZATION
EQUIPMENT
EVAPORATION
FLUE GAS
GASEOUS WASTES
HALIDES
HALOGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POLLUTION CONTROL EQUIPMENT
RECYCLING
REMOVAL
SCRUBBING
SEPARATION PROCESSES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES
WATER REMOVAL