Flue gas desulfurization process
The method is described for reducing sulfur dioxide content of a flue gas resulting from combustion of a sulfur-containing fuel. The method consists of: (a) mixing into the flue gas, at a point where its temperature is between about 120/sup 0/ and about 230/sup 0/ C., a finely divided dry sorbent comprising alkaline earth metal oxide or hydroxide in amount sufficient to provide a metal salt: sulfur ratio of at least about 0.5, the alkaline earth metal being selected from calcium and magnesium; (b) spraying into the resulting suspension of sorbent in flue gas an aqueous solution of solubilizing agent, such agent being selected from sodium hydroxide, sodium carbonate, calcium chloride, adipic acid and glycerol; (c) providing a contact time between the sorbent in flue gas and droplets resulting from the spraying of at least about 1 second; (d) subsequently separating from the flue gas solids comprising sorbent and solids resulting from combustion of the fuel; (e) discharging from the separating a flue gas of substantially diminished sulfur dioxide content; and (f) regulating the rate of the spraying relative to the rate of the flue gas such that the temperature of the flue gas at the point of the separating is between about 10/sup 0/ C. and about 35/sup 0/ C. above its saturation temperature.
- Assignee:
- Conoco, Inc., Wilmington, DE
- Patent Number(s):
- US 4600568
- OSTI ID:
- 5455275
- Resource Relation:
- Patent File Date: Filed date 22 Mar 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FLUE GAS
DESULFURIZATION
SULFUR DIOXIDE
AIR POLLUTION ABATEMENT
ADIPIC ACID
ADSORBENTS
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
CALCIUM CHLORIDES
COMBUSTION PRODUCTS
DROPLETS
FUELS
GLYCEROL
HIGH TEMPERATURE
MAGNESIUM COMPOUNDS
MEDIUM TEMPERATURE
MIXING
OXIDES
QUANTITY RATIO
SODIUM CARBONATES
SODIUM HYDROXIDES
SPRAYS
TIME DEPENDENCE
ALCOHOLS
ALKALI METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DICARBOXYLIC ACIDS
DISPERSIONS
GASEOUS WASTES
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PARTICLES
POLLUTION ABATEMENT
SODIUM COMPOUNDS
SOLUTIONS
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)