Control of scale in flue gas scrubbers

Patent · Tue Jun 02 00:00:00 EDT 1987

OSTI ID:6222488

Thomas, P A; Dewitt-Dick, D B

This patent describes a flue gas desulfurization system in which sulfur dioxide-containing flue gas is passed in countercurrent flow with an aqueous calcium-bearing scrubbing liquor whereby the sulfur dioxide is removed from the flue gas by being absorbed by the scrubbing liquor and converted to calcium sulfite and/or calcium sulfate. The improvement of minimizing the formation of calcium scale on the surfaces of the system comprises maintaining in the scrubbing liquor about 0.1-25 ppm of a 1:1 diisobutylene-maleic anhydride copolymer having an average molecular weight of 11000. The copolymer is incorporated in the scrubbing liquor as a 10-15% aqueous dispersion.

• Assignee: Drew Chemical Corp., Boonton, NJ
• Patent Number(s): US 4670236
• OSTI ID: 6222488
• Resource Relation: Patent File Date: Filed date 27 Jan 1986
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
42 ENGINEERING
FLUE GAS
DESULFURIZATION
SCRUBBERS
SCALE CONTROL
SULFUR DIOXIDE
AIR POLLUTION CONTROL
2-METHYLPROPENE
ADSORPTION
AQUEOUS SOLUTIONS
CALCIUM COMPOUNDS
CALCIUM SULFATES
COPOLYMERS
COUNTER CURRENT
MALEIC ACID
MOLECULAR WEIGHT
QUANTITY RATIO
SCRUBBING
SULFITES
ALKALINE EARTH METAL COMPOUNDS
ALKENES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DICARBOXYLIC ACIDS
DISPERSIONS
EQUIPMENT
GASEOUS WASTES
HYDROCARBONS
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POLYMERS
SOLUTIONS
SORPTION
SULFATES
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
424000 - Engineering- Pollution Control Equipment- (1980-1989)