Fluid bed calcining apparatus

Details Fluid bed calcining apparatus Fluid bed calcining apparatus

1980-11-07

1981-12-08

Richman, Barry

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

422145, 422146, 423167, 423DIG16, 432 15, 432 58, 432 72, C01F 1100, F27B 1500, B01J 828

Patent

active

043047548

ABSTRACT:
In order to increase or maintain the capacity of fluid bed calciners in the calcination of phosphate rock containng large amounts of organic matter ("hot rocks"), the calciner is modified to permit a pyrolysis reaction to occur in the freeboard zone of the calciner. The hydrocarbons and carbon monoxide gas produced by the pyrolysis reaction are removed from the calciner and burned in an afterburner unit. Dust and fines entrained in the exhaust from the calciner are sent to a dust oxidation chamber outside the calciner for oxidation by addition of air.

REFERENCES:
patent: 3266788 (1966-08-01), Jukkola
patent: 3364008 (1968-01-01), Hollingsworth et al.
patent: 3511616 (1970-05-01), Steever
patent: 3758266 (1973-09-01), Retali et al.
patent: 3872211 (1975-03-01), Wall
patent: 3998929 (1976-12-01), Leyshon
patent: 4017585 (1977-04-01), Angeuize et al.
patent: 4083929 (1978-04-01), Prestley
patent: 4085516 (1978-04-01), Jukkola et al.

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