Fast fluidized bed steam generator

Details Fast fluidized bed steam generator Fast fluidized bed steam generator

1977-12-28

1980-01-15

Sprague, Kenneth W.

Liquid heaters and vaporizers

Miscellaneous

110245, F22B 102, F23D 1902

Patent

active

041833309

ABSTRACT:
A steam generator in which a high-velocity, combustion-supporting gas is passed through a bed of particulate material to provide a fluidized bed having a dense-phase portion and an entrained-phase portion for the combustion of fuel material. A first set of heat transfer elements connected to a steam drum is vertically disposed above the dense-phase fluidized bed to form a first flow circuit for heat transfer fluid which is heated primarily by the entrained-phase fluidized bed. A second set of heat transfer elements connected to the steam drum and forming the wall structure of the furnace provides a second flow circuit for the heat transfer fluid, the lower portion of which is heated by the dense-phase fluidized bed and the upper portion by the entrained-phase fluidized bed.

REFERENCES:
patent: 3387590 (1968-06-01), Bishop
patent: 3431892 (1969-03-01), Godel
patent: 3736908 (1973-06-01), Ehrlich et al.
patent: 3763830 (1973-10-01), Robinson et al.
patent: 3991816 (1976-11-01), Klaren

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