Filter

Details Filter Filter

1974-12-16

1976-06-29

Hart, Charles N.

Liquid purification or separation

With means to add treating material

Plural distinct separators

210216, 210328, 210333R, 210393, 210400, B01D 3302

Patent

active

039666115

ABSTRACT:
In filters of the type in which a cake of solids deposited from a liquid slurry thereof on a generally horizontal filter medium is subjected to treatment involving passage of liquid through the cake while on the filter medium, means is provided for increasing the drainage rate of the formed cake by causing the cake to form on the medium from the slurry fed thereto by gravity settling in the liquor of the slurry and by removing liquor of the slurry from above the cake while the liquor still contains unsettled fine particles, such means including means providing a backflushing flow of liquid through the underside of the filter medium and the cake forming thereon into the slurry.

REFERENCES:
patent: 1097896 (1914-05-01), Trent
patent: 1668557 (1928-05-01), Grondal
patent: 2034784 (1936-03-01), Wallny
patent: 2677467 (1954-05-01), Giorgini
patent: 3216576 (1965-11-01), Roos
patent: 3552572 (1971-01-01), Lehmann
patent: 3830658 (1974-08-01), Davister
taggart, Handbook of Mineral Dressing, 1950, pp. 8-43 to 8-49 and 11-04 to 11-23.

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