Regeneration of lime from sulfates for fluidized-bed combustion

Patent · Tue Apr 08 00:00:00 EST 1980

OSTI ID:6788741

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 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
• Resource Relation: Patent File Date: Filed date 7 Dec 1977; Other Information: PAT-APPL-858,221
• Country of Publication: United States
• Language: English

Related Subjects

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