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Title: Economic recovery and utilization of boiler flue gas pollutants

Abstract

This patent describes a method of removing unwanted pollutants from flue gas streams from power plants. It comprises passing flue gas containing lime, sulphur dioxide and water in succession through at least three vertically extending beds of particulates, the particulates being disposed in a duct such that the flue gas is passed through substantially all of the particulates, reacting lime, sulphur dioxide and water in the flue gas to form gypsum at a first bed of particulates; reacting sulphur dioxide and water in the flue gas to form sulphuric acid, and collecting sulphuric acid below its condensation temperature at a second bed of particulates; reacting sulphur dioxide in the flue gas with an alkali material to form bisulphites and bisulphates at a third bed of particulates; and removing the pollutants from the particulates of the beds.

Inventors:
;
Publication Date:
OSTI Identifier:
5469407
Patent Number(s):
US 5061467; A
Application Number:
PPN: US 7-549200
Assignee:
ROM Industries Corp., Los Angeles, CA (United States) NOV; NOV-92-010061; EDB-92-078154
Resource Type:
Patent
Resource Relation:
Patent File Date: 6 Jul 1990
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 20 FOSSIL-FUELED POWER PLANTS; 54 ENVIRONMENTAL SCIENCES; FLUE GAS; POLLUTION CONTROL EQUIPMENT; FOSSIL-FUEL POWER PLANTS; WASTE MANAGEMENT; WASTE PRODUCT UTILIZATION; INDUSTRIAL WASTES; MATERIALS RECOVERY; ECONOMICS; AIR POLLUTION CONTROL; GYPSUM; PARTICULATES; POLLUTANTS; RESOURCE CONSERVATION; SULFUR DIOXIDE; CHALCOGENIDES; CONTROL; EQUIPMENT; GASEOUS WASTES; MANAGEMENT; MINERALS; OXIDES; OXYGEN COMPOUNDS; PARTICLES; POLLUTION CONTROL; POWER PLANTS; PROCESSING; RECOVERY; SULFATE MINERALS; SULFUR COMPOUNDS; SULFUR OXIDES; THERMAL POWER PLANTS; WASTE PROCESSING; WASTES; 320305* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management; 200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions; 540120 - Environment, Atmospheric- Chemicals Monitoring & Transport- (1990-)

Citation Formats

Johnson, A.F., and Sackett, R.L.. Economic recovery and utilization of boiler flue gas pollutants. United States: N. p., 1991. Web.
Johnson, A.F., & Sackett, R.L.. Economic recovery and utilization of boiler flue gas pollutants. United States.
Johnson, A.F., and Sackett, R.L.. 1991. "Economic recovery and utilization of boiler flue gas pollutants". United States. doi:.
@article{osti_5469407,
title = {Economic recovery and utilization of boiler flue gas pollutants},
author = {Johnson, A.F. and Sackett, R.L.},
abstractNote = {This patent describes a method of removing unwanted pollutants from flue gas streams from power plants. It comprises passing flue gas containing lime, sulphur dioxide and water in succession through at least three vertically extending beds of particulates, the particulates being disposed in a duct such that the flue gas is passed through substantially all of the particulates, reacting lime, sulphur dioxide and water in the flue gas to form gypsum at a first bed of particulates; reacting sulphur dioxide and water in the flue gas to form sulphuric acid, and collecting sulphuric acid below its condensation temperature at a second bed of particulates; reacting sulphur dioxide in the flue gas with an alkali material to form bisulphites and bisulphates at a third bed of particulates; and removing the pollutants from the particulates of the beds.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1991,
month =
}
  • This patent describes an article of manufacture for removing SO{sub 2}, NO{sub x} and other pollutants from a flue gas stream containing these pollutants. It comprises: a horizontal housing defining a duct for flow of flue gas therethrough; at least three vertical beds of particulates disposed in succession transversely in the duct, whereby the flue gas flows in succession through each of the beds; means for supplying a particulate material for removing entrained fly ash from the flue gas stream to a first one of the beds; means for supplying a particulate material for removing sulfuric acid from flue gasmore » stream to a second one of the beds; a third one of the beds comprising a regenerable particulate catalyst for carrying an alkali reactant thereon for reacting with sulfur dioxide in the flue stream; means for injecting an alkali material into the flue gas stream upstream of the third bed; and means for inducing high velocity turbulent flow of the flue gas through the at least three beds.« less
  • Carbon monoxide and sulfur oxides are removed from flue gas produced in a catalyst regenerator in an FCC system and sulfur from the flue gas is shifted to form hydrogen sulfide. The hydrogen sulfide is recovered in the gases removed from the cracking reactor in the system by reacting carbon monoxide in the regenerator flue gas with oxygen in contact with a particulate carbon monoxide combustion promoter, reacting sulfur oxides in the regenerator flue gas with particulate alumina physically mixed with the FCC catalyst to form a sulfur-containing solid, and forming hydrogen sulfide in the cracking reactor by contacting themore » sulfur-containing solid with the hydrocarbon feed.« less
  • Carbon monoxide and sulfur oxides are removed from flue gas produced in a catalyst regenerator in an FCC system and sulfur from the flue gas is shifted to form hydrogen sulfide. The hydrogen sulfide is recovered in the gases removed from the cracking reactor in the system by introducing sufficient molecular oxygen into the catalyst regenerator to provide an atmosphere therein having a molecular oxygen concentration of at least 0.1 volume percent, reacting carbon monoxide in the regenerator flue gas with oxygen in contact with a particulate carbon monoxide combustion promoter physically admixed with the cracking catalyst, reacting sulfur oxidesmore » in the regenerator flue gas with silica-free alumina included as a discrete phase in the FCC catalyst to form a sulfur-containing solid in the catalyst, and forming hydrogen sulfide in the cracking reactor by contacting the sulfur-containing solid with the hydrocarbon feed.« less
  • Carbon monoxide and sulfur oxides are removed from flue gas produced in a catalyst regenerator in an FCC system. Sulfur from the flue gas is shifted to form hydrogen sulfide, which is recovered in the gases removed from the cracking reactor in the system by introducing sufficient molecular oxygen into the catalyst regenerator to provide an atmosphere therein having a molecular oxygen concentration of at least 0.1 volume percent. Carbon monoxide in the regenerator flue gas reacts with oxygen in contact with a particulate carbon monoxide combustion promoter physically admixed with the cracking catalyst. Sulfur oxides in the regenerator fluemore » gas react with silica-free alumina included as a discrete phase in the FCC catalyst to form a sulfur-containing solid in the catalyst, and forming hydrogen sulfide in the cracking reactor by contacting the sulfur-containing solid with the hydrocarbon feed.« less
  • Carbon monoxide and sulfur oxides are removed from catalyst regenerator flue gas in an FCC system using a nonzeolitic cracking catalyst. Sulfur from the flue gas is shifted to form hydrogen sulfide, which is recovered in the gases removed from the cracking reactor in the system by reacting carbon monoxide in the regenerator flue gas with oxygen in contact with a particulate carbon monoxide combustion promoter. Sulfur oxides in the regenerator flue gas react with particulate alumina physically mixed with the nonzeolitic catalyst to form a sulfurcontaining solid. Hydrogen sulfide is formed in the cracking reactor by contacting the sulfur-containingmore » solid with the hydrocarbon feed.« less