Sludge dewatering filter press

Details Sludge dewatering filter press Sludge dewatering filter press

1989-04-17

1990-10-16

Jones, W. Gary

Liquid purification or separation

Filter

Movable medium

210400, 210401, 210DIG3, 100120, B30B 924

Patent

active

049632590

ABSTRACT:
A mechanical sludge dewatering system including a plurality of first rollers, one or more second rollers and a liquid-permeable, endless belt passing between the first and second rollers from an inlet to an outlet end. At least some of the rollers of the first set are tapered from their ends to a smaller diameter at the center, the amount of taper decreasing from the roller at the inlet end to that at the outlet end, the opposing one or more second rollers being of constant diameter. The sludge carried on the belt passes through the cavities defined by the tapered first rollers and the cylindrical second roller(s), which decrease in cross section from the inlet to the outlet end, thereby squeezing water from the sludge. The first rollers each have grooves around their periphery adjacent each end, and the belt carries a protruding strip along each side, the belt being laterally constrained by the strips riding in the grooves. In a first embodiment, the second roller comprises a single drum; in a second embodiment a second, endless, liquid-impermeable belt is superposed with the liquid-permeable belt; in a third embodiment the single drum is replaced by a plurality of cylindrical rollers arranged in opposed relation with corresponding ones of the first rollers.

REFERENCES:
patent: 3459122 (1969-08-01), Pastoors et al.
patent: 4053419 (1977-10-01), Pav
patent: 4142971 (1979-03-01), Le Fur et al.
patent: 4297215 (1981-10-01), Altmeyer et al.

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