Material treatment

Details Material treatment Material treatment

1989-07-05

1990-09-11

Yuen, Henry C.

Heating

Advancing structure flexing, looping or coiling sheet, web...

432 8, 432 72, 34 57R, F27B 928

Patent

active

049562711

ABSTRACT:
A multimode thermal treatment system includes a series of particle treatment zones. Perforate conveyer structure for supporting the particulate product to be thermally treated is disposed for movement through the series of treatment zones. Each treatment zone includes first (upper) distribution plenum structure disposed above the treatment zone and an array of nozzle tubes extending downwardly from the upper distribution plenum into the treatment zone to flow conditioned gas with substantial velocity into the treatment zone for thermal treatment of particulate material being transported by the conveyer structure through the treatment zone; and a second (lower) distribution plenum disposed below the treatment zone for pressurizing the region below the treatment zone and flowing conditioned gas upward through the conveyer structure and the particulate material on the conveyer. The upper and lower distribution plenums are connected to conditioning gas circuit structure, and distribution of gas through the upper and lower distribution plenums to the treatment zone and discharge therefrom is controlled selectively to provide different modes of particulate product treatment.

REFERENCES:
patent: 3262217 (1966-07-01), Brown
patent: 3372489 (1968-03-01), Brown
patent: 4116620 (1978-09-01), Stible
patent: 4201499 (1980-05-01), Buske
patent: 4322447 (1982-03-01), Hubbard
patent: 4373702 (1983-02-01), Jayaraman et al.
patent: 4493640 (1985-01-01), Hanson
patent: 4529379 (1985-07-01), DiCastri
patent: 4790749 (1988-12-01), Mauro
patent: 4802843 (1989-02-01), Chilva

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