Regeneration of lime from sulfates for fluidized-bed combustion

Details Regeneration of lime from sulfates for fluidized-bed combustion Regeneration of lime from sulfates for fluidized-bed combustion

1977-12-07

1980-04-08

Vertiz, O. R.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423244, C01B 1314, C01F 502, C01B 1700, B01J 800

Patent

active

041972856

ABSTRACT:
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.

REFERENCES:
patent: 3784676 (1974-01-01), Moss
patent: 4060588 (1977-11-01), Mandelik
patent: 4081522 (1978-03-01), Hubble

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