Washing tower for the desulfurization of flue gases

Patent · Tue May 07 00:00:00 EDT 1985

OSTI ID:6223095

Stehning, W

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
• Resource Relation: Patent Priority Date: Priority date 20 Jul 1983, Germany, Federal Republic of (F.R. Germany); Other Information: PAT-APPL-515919
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
54 ENVIRONMENTAL SCIENCES
FLUE GAS
DESULFURIZATION
SCRUBBING
SCRUBBERS
ADDITIVES
SULFUR DIOXIDE
ADSORPTION
SULFUR TRIOXIDE
CALCIUM
CALCIUM SULFATES
OXIDATION
SORPTIVE PROPERTIES
WORKING FLUIDS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
CALCIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
EQUIPMENT
FLUIDS
GASEOUS WASTES
METALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
SORPTION
SULFATES
SULFUR COMPOUNDS
SULFUR OXIDES
SURFACE PROPERTIES
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)