Washing tower 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 standstill, 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:
- Gottfried Bischoff Bau kompl. Gasreinigungs-und Wasserruckkuhlanlagen GmbH and Co. (Germany, Federal Republic Of)
- Patent Number(s):
- US 4515754
- OSTI ID:
- 6223095
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADDITIVES
ADSORPTION
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
CALCIUM
CALCIUM COMPOUNDS
CALCIUM SULFATES
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
ELEMENTS
EQUIPMENT
FLUE GAS
FLUIDS
GASEOUS WASTES
METALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
SCRUBBERS
SCRUBBING
SORPTION
SORPTIVE PROPERTIES
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFUR TRIOXIDE
SURFACE PROPERTIES
WASTES
WORKING FLUIDS