Low load coal bucket

Details Low load coal bucket Low load coal bucket

1979-04-13

1981-02-24

Yuen, Henry C.

Furnaces

Fuel feeders

Blower

110261, 110265, 239587, F23K 302

Patent

active

042520690

ABSTRACT:
An improved fuel-air admission assembly incorporating a split coal bucket which permits a pulverized coal-fired furnace to be operated at low loads without the use of auxiliary fuel to provide stabilization. The split coal bucket comprises an upper and a lower coal nozzle pivotally mounted to the coal delivery pipe, the upper and lower coal nozzles being independently tiltable. When the furnace is operating at low loads, the primary air and pulverized coal stream discharging from the coal delivery pipe is split into a first and a second coal-air stream and independently directed into the furnace by tilting at least one of the nozzles away from the longitudinal axis of the coal delivery pipe, thereby establishing an ignition stabilizing pocket in the locally low pressure zone created between the spread apart coal-air streams.

REFERENCES:
patent: 819602 (1906-05-01), Rupp
patent: 1011934 (1911-12-01), Fellows
patent: 1949277 (1934-02-01), Jackson
patent: 1957965 (1934-05-01), Kennedy et al.
patent: 2363875 (1944-11-01), Kreisinger et al.
patent: 2608168 (1952-08-01), Jackson
patent: 2800888 (1957-07-01), Miller et al.
patent: 2895435 (1959-07-01), Bogot et al.
patent: 4173189 (1979-11-01), Cooper

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