Flue gas desulfurization process
The method of reducing sulfur dioxide content of a flue gas resulting from combustion of sulfur-containing fuel is described. The method comprises: (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 slaked with an aqueous solution of solubilizing agent, the sorbent being added 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 and the solubilizing agent selected from sodium hydroxide, sodium carbonate, calcium chloride, adipic acid and glycerol; (b) spraying into the resulting suspension of sorbent in flue gas a humidifying agent selected from water and steam; (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 addition of the 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 30/sup 0/C. above its saturation temperature.
- Assignee:
- Conoco, Inc., Wilmington, DE
- Patent Number(s):
- US 4604269
- OSTI ID:
- 5274622
- Resource Relation:
- Patent File Date: Filed date 22 Mar 1985
- Country of Publication:
- United States
- Language:
- English
Similar Records
Desulfurization of flue gas from multiple boilers
Flue gas desulfurization process
Related Subjects
CALCIUM OXIDES
SORPTIVE PROPERTIES
FLUE GAS
DESULFURIZATION
MAGNESIUM OXIDES
SULFUR DIOXIDE
ADSORPTION
AIR POLLUTION CONTROL
ADIPIC ACID
CALCIUM CHLORIDES
DROPLETS
GLYCEROL
MEDIUM TEMPERATURE
SODIUM CARBONATES
SODIUM HYDROXIDES
SPRAYS
STEAM
SULFUR CONTENT
TIME DEPENDENCE
WATER
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
GASEOUS WASTES
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
MAGNESIUM COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION CONTROL
SODIUM COMPOUNDS
SORPTION
SULFUR COMPOUNDS
SULFUR OXIDES
SURFACE PROPERTIES
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)