Drying and gas or vapor contact with solids – Apparatus – With apparatus using centrifugal force
Patent
1991-02-05
1992-07-28
Yuen, Henry C.
Drying and gas or vapor contact with solids
Apparatus
With apparatus using centrifugal force
34 10, 432 58, F26B 1710
Patent
active
051331373
ABSTRACT:
A method and apparatus for heat treating a particulate product including fluidizable as well as non-fluidizable particles. The particles are fed to a first perforated bed plate of a fluidized bed apparatus comprising at least one further stage formed by a second perforated bed plate. Heat treating gas is supplied upwardly to the first and second bed plates to fluidize the fluidizable particles thereon. The non-fluidizable particles are moved from the first bed plate into at least one discharge passage opening in the first bed plate. A flow of classifying gas is directed upwardly through the discharge passage to prevent fluidizable particles from leaving the fluidized bed through the discharge passage, while non-fluidizable particles are allowed to be discharged. The fluidizable particles are transferred from the first stage into the second stage for further treatment.
REFERENCES:
patent: 3349500 (1967-10-01), Wall
patent: 4051603 (1977-10-01), Kern, Jr.
patent: 4492040 (1985-01-01), Jensen et al.
patent: 4627173 (1986-12-01), O'Hagan et al.
patent: 4628833 (1986-12-01), O'Hagan et al.
patent: 5034196 (1991-07-01), Zenz et al.
Niro A/S
Yuen Henry C.
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