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Title: Flue gas desulfurization process

Abstract

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 thatmore » 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.« less

Inventors:
Publication Date:
OSTI Identifier:
5274622
Patent Number(s):
US 4604269
Assignee:
Conoco, Inc., Wilmington, DE
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 22 Mar 1985
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 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)

Citation Formats

Yoon, H. Flue gas desulfurization process. United States: N. p., 1986. Web.
Yoon, H. Flue gas desulfurization process. United States.
Yoon, H. 1986. "Flue gas desulfurization process". United States.
@article{osti_5274622,
title = {Flue gas desulfurization process},
author = {Yoon, H},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/5274622}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 05 00:00:00 EDT 1986},
month = {Tue Aug 05 00:00:00 EDT 1986}
}