Patent · US Expired

Method for treatment of a fibrous material-fluid mixture

US5238501A · kind A · utility

19Cited by

10References

12Claims

0Family size

Assignee

Maschinenfabrik Andritz Actiengesellschaft · AT

Inventors

Johannes Kappel · Graz, AT
Franz Petschauer · Lannach, AT

Key dates

Filing date	Jun 29, 1990
Grant date	Aug 24, 1993
Priority date	—
Expiry date	Jun 29, 2010

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21C9/06
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a method and device for the washing of a medium consistency fibrous slurry, especially a chemical pulp slurry in which the slurry is fed at an inclined angle onto a substantially horizontal portion of circulating filter belt, and then distributed over substantially the entire working width of the filter belt. The distributed slurry is then washed with a washing liquid under localized pressure to produce a slurry having a medium consistency range, i.e., about 8 to 15 percent. In order to increase the consistency to 20 to 40 weight percent, preferably about 30 to about 35 weight percent, the washed slurry is passed to a pressing zone.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.