Recirculating fluidized bed combustion system for a steam genera

Details Recirculating fluidized bed combustion system for a steam genera Recirculating fluidized bed combustion system for a steam genera

1982-12-08

1984-04-17

Favors, Edward G.

Liquid heaters and vaporizers

Miscellaneous

110245, 110263, 431170, F22B 100

Patent

active

044427956

ABSTRACT:
The invention comprises a steam generator fluidized bed which recirculates through a major portion of the normal gas to fluid heat transfer circuits. Solid bed material is separated, collected and recirculated. Bed temperatures are limited by regulation of density of bed inert material to inhibit the radiant aspects of combustion. Gas recirculation is used to supplement air flow to achieve higher than entrainment bed gas velocity in the fuel ignition and reaction zone. Fuel ignition and reaction are controlled by limiting the amount of atmospheric air flow to the circulating fuel rich bed mixture to regulate extent of propagation of the ignition and reaction zone into the initial portion of the circulating bed loop, starting from the point of highest gas pressure.

REFERENCES:
patent: 4085707 (1978-04-01), Moss
patent: 4165717 (1979-08-01), Reh et al.
patent: 4250839 (1981-02-01), Daman
patent: 4312301 (1982-01-01), Anson

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