Flue gas desulfurization process

Patent · Tue Aug 05 04:00:00 EDT 1986

OSTI ID:5274622

Yoon, H

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
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADIPIC ACID
ADSORPTION
AIR POLLUTION CONTROL
ALCOHOLS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CALCIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
CONTROL
DESULFURIZATION
DICARBOXYLIC ACIDS
DROPLETS
FLUE GAS
GASEOUS WASTES
GLYCEROL
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MEDIUM TEMPERATURE
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION CONTROL
SODIUM CARBONATES
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SORPTION
SORPTIVE PROPERTIES
SPRAYS
STEAM
SULFUR COMPOUNDS
SULFUR CONTENT
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES
TIME DEPENDENCE
WASTES
WATER