Regeneration of lime from sulfates for fluidized-bed combustion

Patent · Tue Jan 01 04:00:00 EST 1980

OSTI ID:863553

Yang, Ralph T ^[1]; Steinberg, Meyer ^[2]

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1. Middle Island, NY
2. Huntington Station, NY

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.degree. to 1000.degree. 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.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY
• DOE Contract Number: EY-76-C-02-0016
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4197285
• OSTI ID: 863553
• Country of Publication: United States
• Language: English

Related Subjects

/423/
1000
900
ash
bed
bed combustion
bed combustor
calcium
calcium sulfate
cao
carbonaceous
carbonaceous material
combustion
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decomposed
degree
effective
evolving
fluidized
fluidized bed
fluidized-bed
fluidized-bed combustion
fluidized-bed combustor
fly
fly ash
form
form calcium
lime
manner
material
oxides
presence
react
reacted
recovered
recycled
regenerate
regenerated
regeneration
removing
sulfate
sulfates
sulfur
sulfur oxide
sulfur oxides
temperatures