Flue gas desulfurization process

Patent · Tue Sep 23 04:00:00 EDT 1986

OSTI ID:5101039

Yoon, H; Statnick, R M

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
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADIPIC ACID
ADSORBENTS
AIR POLLUTION CONTROL
ALCOHOLS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
CALCIUM CARBONATES
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COMBUSTION PRODUCTS
CONTROL
DESULFURIZATION
DICARBOXYLIC ACIDS
DISPERSIONS
DROPLETS
DRYING
FLOW RATE
FLUE GAS
GASEOUS WASTES
GLYCEROL
HALIDES
HALOGEN COMPOUNDS
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
MEDIUM TEMPERATURE
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION CONTROL
QUANTITY RATIO
REMOVAL
SATURATION
SODIUM CARBONATES
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SOLUTIONS
SPRAYS
SULFUR COMPOUNDS
SULFUR CONTENT
SULFUR DIOXIDE
SULFUR OXIDES
TIME DEPENDENCE
WASTES