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

1995-09-13

1997-10-28

Fortuna, Ana

Liquid purification or separation

Flow, fluid pressure or material level, responsive

210388, 210391, 210456, 162251, B01D 2124, B01D 2430

Patent

active

056814534

ABSTRACT:
This invention relates to a vertical vessel, particularly a continuous pulp digestion vessel, wherein fiber materials suspended in liquid pass downwardly past screens through which treatment liquid is withdrawn. The screens are reciprocated vertically up and down utilizing a piston and cylinder assembly. The piston moves downwardly on the pressure from a pump and returns upwardly on the influence of the interior digester pressure during normal digester operation. The positioning of the pistons on the inside of the screens provides many advantages.

REFERENCES:
patent: 3752319 (1973-08-01), Richter
patent: 4029579 (1977-06-01), Jacobsen et al.
patent: 4396509 (1983-08-01), Foyn
patent: 4529482 (1985-07-01), Richter
patent: 4637878 (1987-01-01), Richter et al.
patent: 5547570 (1996-08-01), Richter

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