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Title: Methods for the recovery of sulfur components from flue gas and recycle sodium sulfite by reduction-smelting and carbonating to strip hydrogen sulfide

Abstract

An improved method for recovering sulfur from flue gas which contains sulfur dioxide formed from burning sulfur containing fuels is disclosed. The method first involves the reduction burning of auxilary fuel in the presence of sodium sulfite to convert it to smelt containing sodium sulfide and sodium carbonate. The smelt is dissolved, and the solution reacted with carbon dioxide, hydrogen sulfide and water vapor forming sodium hydrosulfide. The sodium hydrosulfide is reacted with a high concentration of recycled sodium bicarbonate and stripped with carbon dioxide to form sodium carbonate and release the sulfides as hydrogen sulfide from the stripper. The hydrogen sulfide released is then converted to sulfur dioxide, sulfuric acid or elemental sulfur. Pressurized carbon dioxide is used for pressure carbonation of recycled solution from the stripper to convert the sodium carbonate to the high concentration of recycled sodium bicarbonate used for stripping. The sodium carbonate and sodium bicarbonate from the stripper are reacted under pressure with sodium bisulfite in a decarbonator to form sodium sulfite and release carbon dioxide under pressure for use in the pressure carbonation. A portion of the sodium sulfite formed by decarbonation is then reduced in the smelter. The balance of the sodium sulfitemore » is then used for absorption of the sulfur dioxide from the flue gas forming the sodium bisulfite used for decarbonation.« less

Inventors:
Publication Date:
OSTI Identifier:
6333084
Patent Number(s):
US 4241041
Assignee:
MEI Systems Inc
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 22 Jan 1979
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; 42 ENGINEERING; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; FLUE GAS; DESULFURIZATION; FOSSIL-FUEL POWER PLANTS; INDUSTRIAL PLANTS; SULFUR; MATERIALS RECOVERY; SCRUBBING; SULFUR DIOXIDE; CHALCOGENIDES; CHEMICAL REACTIONS; ELEMENTS; GASEOUS WASTES; MANAGEMENT; NONMETALS; OXIDES; OXYGEN COMPOUNDS; POWER PLANTS; PROCESSING; RECOVERY; SULFUR COMPOUNDS; SULFUR OXIDES; THERMAL POWER PLANTS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES; 200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions; 424000 - Engineering- Pollution Control Equipment- (1980-1989); 320305 - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management

Citation Formats

Farin, W G. Methods for the recovery of sulfur components from flue gas and recycle sodium sulfite by reduction-smelting and carbonating to strip hydrogen sulfide. United States: N. p., 1980. Web.
Farin, W G. Methods for the recovery of sulfur components from flue gas and recycle sodium sulfite by reduction-smelting and carbonating to strip hydrogen sulfide. United States.
Farin, W G. Tue . "Methods for the recovery of sulfur components from flue gas and recycle sodium sulfite by reduction-smelting and carbonating to strip hydrogen sulfide". United States.
@article{osti_6333084,
title = {Methods for the recovery of sulfur components from flue gas and recycle sodium sulfite by reduction-smelting and carbonating to strip hydrogen sulfide},
author = {Farin, W G},
abstractNote = {An improved method for recovering sulfur from flue gas which contains sulfur dioxide formed from burning sulfur containing fuels is disclosed. The method first involves the reduction burning of auxilary fuel in the presence of sodium sulfite to convert it to smelt containing sodium sulfide and sodium carbonate. The smelt is dissolved, and the solution reacted with carbon dioxide, hydrogen sulfide and water vapor forming sodium hydrosulfide. The sodium hydrosulfide is reacted with a high concentration of recycled sodium bicarbonate and stripped with carbon dioxide to form sodium carbonate and release the sulfides as hydrogen sulfide from the stripper. The hydrogen sulfide released is then converted to sulfur dioxide, sulfuric acid or elemental sulfur. Pressurized carbon dioxide is used for pressure carbonation of recycled solution from the stripper to convert the sodium carbonate to the high concentration of recycled sodium bicarbonate used for stripping. The sodium carbonate and sodium bicarbonate from the stripper are reacted under pressure with sodium bisulfite in a decarbonator to form sodium sulfite and release carbon dioxide under pressure for use in the pressure carbonation. A portion of the sodium sulfite formed by decarbonation is then reduced in the smelter. The balance of the sodium sulfite is then used for absorption of the sulfur dioxide from the flue gas forming the sodium bisulfite used for decarbonation.},
doi = {},
url = {https://www.osti.gov/biblio/6333084}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {12}
}