Method and apparatus for recovering fibrous material from a pape

Details Method and apparatus for recovering fibrous material from a pape Method and apparatus for recovering fibrous material from a pape

1989-07-13

1991-12-24

Dawson, Robert A.

Liquid purification or separation

With drip, overflow or content draining feature

210299, 2103231, 210519, 2105321, B01D 2124

Patent

active

050750011

ABSTRACT:
An apparatus for the recovery of fibrous material from process water used in the manufacture of pulp and/or paper, including recycle fiber facilities. The apparatus involves hydraulic classification in the first stage to separate contaminants having a greater settling velocity than fiber, from fiber and other light contaminants with the same or slower settling velocity of fiber. The second stage of the apparatus involves classification by screening to separate the fine contaminants from the fiber. The degree of classification in each stage is determined by the end use of the fiber recovered.

REFERENCES:
patent: 881383 (1908-03-01), Dohan
patent: 973357 (1910-10-01), Lewis et al.
patent: 1061767 (1913-05-01), Stanley
patent: 1349112 (1920-08-01), Weiss
patent: 1534145 (1925-04-01), Stedman
patent: 1709676 (1929-04-01), Martyn
patent: 2379411 (1945-07-01), Berges
patent: 3635346 (1972-01-01), Zuckerman et al.
patent: 4529482 (1985-07-01), Richter et al.
patent: 4555340 (1985-11-01), Boyle

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