Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1981-09-08
1983-08-02
Schwartz, Larry I.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 57A, 34 57D, 34 57E, 34191, 432 15, 432 58, F26B 308
Patent
active
043958303
ABSTRACT:
A fluid bed dryer includes a tank with an upright wall, a top, and a floor which rotates under a plurality of blades adjacent the floor and fixed to an inner annular baffle. A gas manifold is defined between the tank wall and the baffle, and opens under the baffle into a drying space in the tank.
A pulse jet engine pumps pulsating hot gas and sonic waves to the gas manifold to fluidize a bed of moist particles which are introduced into the drying space above the blades. There is a time average uniform exposure of the bed to the fluidizing gas effected by continuously changing the exposure of the particles to the gas. Pulsating hot gas and sonic energy waves flow from the periphery of the tank toward the center of the dryer. The pulse jet engine also supplies an auxiliary gas inlet at the side of the tank to maintain a swirl of gas above the fluidized bed. An adjustable bypass diverts the flow of gas from the auxiliary inlet to the gas manifold for adjusting the strength of the gas swirl. Gas and dried products are withdrawn from the dryer, and the gas is recycled to the tailpipe end of the pulse jet engine. The pulse jet inlet is supercharged to provide sufficient oxygen to support continuous combustion. The supercharged atmosphere is kept from feeding the tailpipe exhaust. Drying proceeds in an inert atmosphere.
REFERENCES:
patent: 3592395 (1971-07-01), Lockwood
patent: 3618655 (1971-11-01), Lockwood
patent: 4109394 (1978-08-01), Hoyt
patent: 4226668 (1980-10-01), Ferguson
Jetsonic Processes, Ltd.
Schwartz Larry I.
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