Gravity type pulp washer or thickener with rotating disrupters

Details Gravity type pulp washer or thickener with rotating disrupters Gravity type pulp washer or thickener with rotating disrupters

1991-12-20

1993-11-30

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

162 60, 162311, 68181R, 210402, D21C 906

Patent

active

052661687

ABSTRACT:
A cylinder type paper pulp washer or thickener apparatus includes a rotatable cylinder mold with a forming wire surface. The mold rotates at least partially submerged in a vat of dilute paper pulp stock and a differential pressure across the wire surface draws stock from the vat through the cylinder mold and forms a pulp mat on the wire surface, and a plurality of disrupters are positioned within the vat and in arcuately spaced relation to the wire surface to cause a disruption of the fiber mat which obstructs the flow of the stock liquid through the wire surface and thereby provides for the reestablishment of flow. Various disrupters are shown, including a rotating non-circular bar, a doctor blade, a foil, a fluid jet, a brush, and a triangular protuberance. A plurality of such disrupters are positioned in peripherally spaced relation to cause repeated disruption and reformation of a fiber mat to increase the throughflow and washing or thickening efficiency of the apparatus.

REFERENCES:
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patent: 1746708 (1930-02-01), Mansfield
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patent: 3190792 (1965-06-01), Beachler et al.
patent: 3772144 (1973-11-01), Luthi et al.
patent: 3874998 (1975-04-01), Johnson
patent: 4491501 (1985-01-01), Klein
patent: 4827741 (1989-05-01), Luthi

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