Flue gas desulfurization process
The method is described for reducing sulfur dioxide content of a flue gas resulting from combustion in a combustion zone of a sulfur-containing fuel, which method comprises: (a) injecting into the combustion zone a finely divided dry sorbent comprising calcium carbonate in amount sufficient to provide a metal salt:sulfur ratio of at least about 0.5:1; (b) spraying into the resulting suspension of sorbent in flue gas at a point where the flue gas has a temperature of between about 120/sup 0/ and about 230/sup 0/C. 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 flue gas and droplets resulting from the spraying of at least about 1 second; (d) subsequently separating from the flue gas solids resulting from drying of the droplets and solids resulting from combustion of the fuel; (c) 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 4613487
- OSTI ID:
- 5101039
- 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 CONTROL
REMOVAL
ADIPIC ACID
ADSORBENTS
AQUEOUS SOLUTIONS
CALCIUM CARBONATES
CALCIUM CHLORIDES
COMBUSTION PRODUCTS
DROPLETS
DRYING
FLOW RATE
GLYCEROL
HIGH TEMPERATURE
MEDIUM TEMPERATURE
QUANTITY RATIO
SATURATION
SODIUM CARBONATES
SODIUM HYDROXIDES
SPRAYS
SULFUR CONTENT
TIME DEPENDENCE
ALCOHOLS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CONTROL
DICARBOXYLIC ACIDS
DISPERSIONS
GASEOUS WASTES
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION CONTROL
SODIUM COMPOUNDS
SOLUTIONS
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)