Furnaces – Utilizing powdered fuel
Patent
1983-08-03
1984-11-13
Favors, Edward G.
Furnaces
Utilizing powdered fuel
110210, 110212, 110216, 110245, 110344, 110345, 110347, 122 4D, F23D 100
Patent
active
044818920
ABSTRACT:
A fluidized bed combustion system for burning fuel particles, such as coal. The system includes a housing defining a first combustion region. An endless, flexible, perforate belt is shiftably mounted in the housing for supporting coal particles of relatively large size. A blower below the belt creates fluidized air which entrains smaller coal particles in a fluidized bed above the larger coal particles. The combustion gases arising due to combustion of the coal particles passes through a secondary combustion region in which coal fines are burned. The combustion gases continue upwardly through a scrubber in which limestone particles are entrained in the combustion gases to strip sulfides therefrom. The limestone particles are regenerated by a cyclone separator while the combustion gases travel through a passage containing boilers or other heat exchangers, whereby the heat from the combustion gases is transferred to fluids in the boilers.
REFERENCES:
patent: 4109590 (1978-08-01), Mansfield
patent: 4245573 (1981-01-01), Dixit et al.
patent: 4259911 (1981-04-01), Jones
patent: 4270469 (1981-06-01), Gall
patent: 4312280 (1982-01-01), Shearer
patent: 4419940 (1983-12-01), Cosar et al.
patent: 4419965 (1983-12-01), Garcia-Mallol et al.
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