Reciprocal movable screens in a vertically elongated vessel

Details Reciprocal movable screens in a vertically elongated vessel Reciprocal movable screens in a vertically elongated vessel

1982-03-09

1987-01-20

Sadowski, David

Liquid purification or separation

Filter

Movable medium

162251, B01D 3300

Patent

active

046378782

ABSTRACT:
In vertical vessels, particularly continuous pulp digesters, fibrous material suspended in liquid passes downwardly past screens through which treatment liquid is withdrawn. The screens are reciprocated vertically up and down utilizing a piston and cylinder assembly, operatively connected by a two-way valve to a source of fluid under pressure or a vent. The piston and screen are connected by a universal joint, and the screen is positively guided during movement. The piston is vertically above the screen and the screen moves downwardly under pressure from the pump, and returns upwardly, under the influence of interior digester pressure, during normal digester operation.

REFERENCES:
patent: 2163437 (1939-06-01), Richmond
patent: 2667975 (1954-02-01), Seaholm
patent: 2695232 (1954-11-01), Richter
patent: 2964193 (1960-12-01), Heckmann
patent: 3579420 (1968-04-01), Richter
patent: 3711367 (1973-01-01), Christenson
patent: 3752319 (1973-08-01), Richter

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