Scrubber operating method for the desulfurization of flue gases
A scrubber is provided with a grate in its sump through which oxygen is introduced to separate the oxidation zone above this grate from a reaction zone below the grate, a calcium containing additive being introduced into this reaction zone. Flue gas to be desulfurized is passed through a washing zone above the sump and there contacted with normally circulating scrubbing liquid containing the additive to absorb sulfur dioxide and sulfur trioxide. The sulfur dioxide is oxidized to sulfur trioxide and the additive induces precipitation of calcium sulfate in the sump. After a prolonged stand-still, settled solids in the sump are induced into movement by drawing a portion of the sump liquid from an upper part thereof and injecting it into a lower part of the sump.
- Assignee:
- Cottfried Bischoff Bau Kompl Gasreinigungs-und Wasserruckkuhlangen GmbH and Co. Kommanditgesellschaft (Germany, Federal Republic Of)
- Patent Number(s):
- US 4526764
- OSTI ID:
- 6238728
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION
ADDITIVES
AIR POLLUTION ABATEMENT
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
EQUIPMENT
FLUE GAS
GASEOUS WASTES
OPERATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POLLUTION CONTROL EQUIPMENT
PRECIPITATION
SCRUBBERS
SCRUBBING
SEDIMENTS
SEPARATION PROCESSES
SORPTIVE PROPERTIES
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFUR TRIOXIDE
SURFACE PROPERTIES
WASTES