Fluidized-bed combustion fuel

Details Fluidized-bed combustion fuel Fluidized-bed combustion fuel

1988-12-01

1990-10-09

Dees, Carl F.

Fuel and related compositions

From vegetation or refuse

44503, 44504, 44620, 44627, C10L 500, C10L 1100

Patent

active

049617567

ABSTRACT:
A continuous fluidized-bed combustion process for particulate carbonaceous feedstock of high ash content. The feedstock fuel is prepared from culm or mine tailings washed in a dense media and crushed to yield a fuel product having an ash content in a range of about 30 percent to about 50 percent, by weight. The feedstock fuel is mixed with fine particles of scavenging material, such as limestone or dolomite, and the resulting feedstock mixture is burned in a circulating fluidized-bed combustion chamber. A portion of the ash remaining after combustion is discharged out the bottom chamber, the remainder being carried with the combustion gases through a hot cyclone and heat exchangers for generating power. The ash within these gases is separated and recirculated through the fluidized bed, and the combustion gases are discharged.

REFERENCES:
patent: 1659692 (1928-02-01), Kitchen
patent: 1678863 (1928-07-01), Kitchen
Briquetting, by Stillman, The Chemical Publishing Co., Easton, PA, 1923, p. 259.

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