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Regeneration of lime from sulfates for fluidized-bed combustion

Patent ·
OSTI ID:7260495
;
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 material, such as the fly ash recovered from the combustion, at temperatures of about 900 to 1,000 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. 2 figs.
Assignee:
Dept. of Energy, Washington, DC (United States)
Patent Number(s):
A; US 4197285
Application Number:
PPN: US 5-858221
OSTI ID:
7260495
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
ADSORBENTS
AEROSOL WASTES
AIR POLLUTION ABATEMENT
ALKALINE EARTH METAL COMPOUNDS
ASHES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CALCIUM SULFATES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION PRODUCTS
COMBUSTORS
DECOMPOSITION
ENERGY SOURCES
FLUIDIZED-BED COMBUSTORS
FLY ASH
FOSSIL FUELS
FUELS
MATERIALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
REGENERATION
RESIDUES
SORBENT INJECTION PROCESSES
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTE PRODUCT UTILIZATION
WASTES