Horizontal vacuum belt filter

Details Horizontal vacuum belt filter Horizontal vacuum belt filter

1982-11-18

1985-01-22

Fisher, Richard V.

Liquid purification or separation

With time control

Of additional fluid

210196, 210400, 210406, 210409, B01D 3332

Patent

active

044950705

ABSTRACT:
A filter belt is progressed stepwise over successive vacuum boxes by a guide roller at the forward end of the upper run being extended from its retracted position to its full line position while vacuum to the boxes is shut off. A displaceable roller permits this by taking up any slack in the belt and return movement of the belt upon retraction of the foremost guide roller is prevented by a unidirectional arrangement in at least one of the rollers guiding the lower return run of the belt. Slurry is fed onto the belt by a first nozzle, optional wash liquor is fed onto the resultant filter cake by a second nozzle and optional recirculated wash liquor is fed by a third nozzle all under the influence of a control which provides for such feed only for a predetermined period of time during the actual movement of the belt.

REFERENCES:
patent: 3870641 (1975-03-01), Pierson
patent: 3992298 (1976-11-01), Davis
patent: 4038193 (1977-07-01), Van Oosten
patent: 4127487 (1978-11-01), Havalda
patent: 4146483 (1979-03-01), Lee
patent: 4243527 (1981-01-01), Leonard
patent: 4292173 (1981-09-01), Paramentier

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