Device for dewatering sludge

Details Device for dewatering sludge Device for dewatering sludge

1979-12-11

1981-06-30

Adee, John

Liquid purification or separation

Filter

Movable medium

210401, B01D 3304

Patent

active

042761689

ABSTRACT:
Band filter devices for continuously dewatering a suspension, such as sewage sludge comprising an upper filter band stretched between deflection rolls, the upper strand of which forms a filter zone, and a further filter band which together with the lower part or strand of the first band forms a compressing zone. The filter band is stepped at least once in a Z-shaped manner in the filter zone by providing a further deflection roll which is positioned lower than and downstream of the first deflection roll but in a position counter to the direction of transport, and such that between two filter zones there is a zone where the sludge cake is transferred to another part of the band and rearranged. Above the upper strand or part is at least one ram or beam which lies transverse to the direction of transport and the ram can be pressed into the sludge cake to produce transverse grooves or channels in the sludge cake.

REFERENCES:
patent: 3084987 (1963-04-01), Bounin
patent: 3800952 (1974-04-01), Bastgen
patent: 4181616 (1980-01-01), Bahr

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