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Catalyzed flue gas desulfurization

Patent ·
OSTI ID:6943859

The method is described of reducing sulfur dioxide content of flue gas generated by combustion of sulfur-containing fuel which comprises: (a) passing the flue gas containing molecular oxygen at a temperature of at least about 415/sup 0/C into a first end of a vertically elongated boiler convection zone; (b) introducing into an upper end of the boiler convection zone a shower of dry particulate oxidation catalyst, the catalyst passing through the boiler convection zone co-currently with exiting gases; (c) removing from a lower end of the boiler convection zone a stream comprising the oxidation catalyst; (d) returning a portion of the removed stream of step (c) to the step of introducing in step (b); (e) providing finely divided dry lime, quicklime, limestone or dolomite sulfur trioxide getter to the flue gas at a point proximate to the first end of the boiler convection zone; and (f) removing from a second end of the boiler convection zone a stream comprising flue gas of diminished sulfur dioxide content carrying a suspension of finely divided reaction product of getter and sulfur trioxide.

Assignee:
Conoco, Inc., Wilmington, DE
Patent Number(s):
US 4649034
OSTI ID:
6943859
Country of Publication:
United States
Language:
English

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Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALINE EARTH METAL COMPOUNDS
BOILERS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
CONVECTION
DESULFURIZATION
DOLOMITE
ELEMENTS
ENERGY TRANSFER
FLUE GAS
FLUID FLOW
FUELS
GAS FLOW
GASEOUS WASTES
GETTERS
HEAT TRANSFER
HIGH TEMPERATURE
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MASS TRANSFER
MINERALS
NONMETALS
OXIDATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
QUANTITY RATIO
REMOVAL
ROCKS
SEDIMENTARY ROCKS
SULFUR COMPOUNDS
SULFUR CONTENT
SULFUR DIOXIDE
SULFUR OXIDES
SULFUR TRIOXIDE
THERMOCHEMICAL PROCESSES
WASTES