Fluidized bed coal combustion reactor

Details Fluidized bed coal combustion reactor Fluidized bed coal combustion reactor

1978-12-15

1981-09-08

Yuen, Henry C.

Furnaces

Combined

With boiler

110255, 110266, 110245, 122 4D, F23B 700

Patent

active

042878381

ABSTRACT:
A fluidized bed coal reactor includes a combination nozzle-injector ash-removal unit formed by a grid of closely spaced open channels, each containing a worm screw conveyor, which function as continuous ash removal troughs. A pressurized air-coal mixture is introduced below the unit and is injected through the elongated nozzles formed by the spaces between the channels. The ash build-up in the troughs protects the worm screw conveyors as does the cooling action of the injected mixture. The ash layer and the pressure from the injectors support a fluidized flame holder combustion zone above the grid which heats water in boiler tubes disposed within and/or above the combustion zone and/or within the walls of the reactor.

REFERENCES:
patent: 510788 (1893-12-01), Hawkins
patent: 1606720 (1926-11-01), Pollock
patent: 1714678 (1929-05-01), Kreisinger
patent: 1849095 (1932-03-01), Keenan, Jr.
patent: 3625165 (1971-12-01), Ishigaki
patent: 3776150 (1973-12-01), Evans et al.
patent: 4096909 (1978-06-01), Jukkola
patent: 4099473 (1978-07-01), Mackenzie et al.
patent: 4159000 (1979-06-01), Iwasaki et al.

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