Apparatus for controlling the consistency of a pulp suspension

Details Apparatus for controlling the consistency of a pulp suspension Apparatus for controlling the consistency of a pulp suspension

1983-09-15

1986-04-15

Alvo, Steve

Paper making and fiber liberation

Apparatus

Automatic control

100117, 137 92, 162232, 210104, 210251, D21C 918

Patent

active

045825688

ABSTRACT:
A method and apparatus for treating a pulp suspension in the manufacture of paper employing a controlled drainage thickener and a screw type pulp press. Pulp is fed into the thickener where the feed screw contained therein delivers it to a vertical discharge column. A screw type conveyor delivers the pulp suspension from the vertical discharge column into a vertical inlet column associated with a screw type pulp press. A sensing means is provided to measure the consistency of the pulp entering the press, and a sensing means provides a control signal which is arranged to modulate operation of a discharge valve on the thickener to keep the consistency of the pulp entering the screw type pulp press within a predetermined range.

REFERENCES:
patent: 2607680 (1952-08-01), Weiss et al.
patent: 2862813 (1958-12-01), Birdseye
patent: 3585924 (1971-06-01), Nolan
patent: 3682444 (1972-08-01), Reinhall
patent: 3811993 (1974-05-01), Ghisoni
patent: 3943033 (1976-03-01), Wallen

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