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Regeneration of lime from sulfates for fluidized-bed combustion

Patent ·
OSTI ID:6788741
;
In a fluidized-bed combustor the evolving sulfur oxides are reacted with CaO to form calcium sulfate which is then decomposed in the presence of carbonaceous materials, such as the fly ash recovered from the combustion, at temperatures of about 900/sup 0/ to 1000/sup 0/C, to regenerate lime. The regenerated lime is then recycled to the fluidized bed combustor to further react with the evolving sulfur oxides. The lime regenerated in this manner is quite effective in removing the sulfur oxides.
Assignee:
Dept. of Energy
Patent Number(s):
US 4197285
OSTI ID:
6788741
Country of Publication:
United States
Language:
English

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Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AEROSOL WASTES
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CALCIUM SULFATES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTORS
DECOMPOSITION
DESIGN
FLUIDIZED-BED COMBUSTORS
FLY ASH
MANAGEMENT
MATERIALS
MATERIALS RECOVERY
OXIDES
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
RECYCLING
REGENERATION
SULFATES
SULFUR COMPOUNDS
SULFUR OXIDES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES