Process for draining a fibrous pulp suspension

Details Process for draining a fibrous pulp suspension Process for draining a fibrous pulp suspension

1998-03-05

2000-12-19

Fiorilla, Christopher A.

Paper making and fiber liberation

Processes and products

162 56, D21C 900, D21H 2300

Patent

active

061623261

ABSTRACT:
A process for draining a fibrous pulp web is preferably carried out on drum thickeners or disk filters. A suspension to be drained rests against a perforated first face, which is a part of the rotor of the drum thickener or disk filter, is transported from the suspension vat, and then arrives in a thickening region. The thickening region contains a second face, wherein the first and second face have a relative speed in relation to each other. The effectiveness of the thickening can be significantly increased by vacuum zones provided on the drum thickener or disk filter.

REFERENCES:
patent: 1421364 (1922-07-01), Allen
patent: 2278525 (1942-04-01), Rich et al.
patent: 4750340 (1988-06-01), Anderson
patent: 5269945 (1993-12-01), Holmberg
Copy of a German Search Report dated Aug. 26, 1997 prepared in connection with German Patent Application No. 197 09 084.2.
Copy of a European Search Report dated Nov. 4, 1997 prepared in connection with European Patent Application RS 98509 DE.

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