Circulating fluidized bed steam generator having means for minim

Details Circulating fluidized bed steam generator having means for minim Circulating fluidized bed steam generator having means for minim

1984-03-22

1984-09-25

Favors, Edward G.

Liquid heaters and vaporizers

Miscellaneous

110245, 16510416, 422146, F22B 102

Patent

active

044730330

ABSTRACT:
The invention comprising a circulating fluidized bed firing system for a steam generator wherein the mass flow ratio for solid materials recirculated to hot gas flow employed to entrain and carry the recirculated solid materials to point/s of separation ranges from 6:1 to 2:1 at the furnace outlet and at rated conditions of the steam generator. Means are provided to cool the recirculated solids upstream and/or after separation of the recirculated solids from the gas stream. Conservative gas velocities for entrainment of solid particles in a range of from 16 to 25 ft./sec. at rated conditions of the steam generator minimize erosion of the coolant filled tubular heat exchange surface disposed in the gas stream upstream of the point of separation of solids from the gas stream.

REFERENCES:
patent: 3902462 (1975-09-01), Bryers
patent: 4145848 (1979-03-01), Kulling
patent: 4240377 (1980-12-01), Johnson
patent: 4250839 (1981-02-01), Daman
patent: 4336769 (1982-01-01), Daman
patent: 4397267 (1983-08-01), Fink

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