Regeneration of lime from sulfates for fluidized-bed combustion

Patent · Tue Apr 08 00:00:00 EST 1980

OSTI ID:7260495

Yang, R T; Steinberg, M

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): US 4197285; A
• Application Number: PPN: US 5-858221
• OSTI ID: 7260495
• Resource Relation: Patent File Date: 7 Dec 1977
• Country of Publication: United States
• Language: English

Related Subjects

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