Furnaces – Refuse incinerator – Refuse suspended in or supported by a fluid medium
Patent
1980-06-30
1982-08-17
Yuen, Henry C.
Furnaces
Refuse incinerator
Refuse suspended in or supported by a fluid medium
431158, 122 4D, 432 58, 34 57A, F23G 500
Patent
active
043443729
ABSTRACT:
A fluidized bed combustion device adapted for use with a boiler has an air distributor consisting of a row of generally horizontally oriented, apertured sparge pipes or tubes disposed in a bed of inert particulate material. The center pipes in the row are connected to a start-up burner for receiving heated combustion products and excess air and the outer pipes in the row are connected to selectively receive air through a separate delivery path. During start-up and low load conditions, only the center pipes are pressurized and so that only the center portion of the bed is fluidized to minimize the heat input requirements. Once the central portion of the bed has been heated to the required temperature, primary fuel is delivered to sustain combustion without the start-up burner. At the completion of the start-up process and during high fire conditions all of the tubes are pressurized to fluidize the entire bed.
REFERENCES:
patent: 2842102 (1958-07-01), Blaskowski
patent: 2976853 (1961-03-01), Hunter et al.
patent: 2997031 (1961-08-01), Ulmer
patent: 3376098 (1968-04-01), Pryor
patent: 3904375 (1975-09-01), Calbeck
patent: 3974091 (1976-08-01), Parker et al.
patent: 4240378 (1980-12-01), Caplin
patent: 4258005 (1981-03-01), Ito et al.
patent: 4263857 (1981-04-01), Ban
Aqua-Chem Inc.
Yuen Henry C.
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