Method of washing pulp in a pressure pulp washer adding two washing liquids
US4808265A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Nov 23, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A pulp mat is formed on the outside of a permeable, rotatable drum by feeding a pulp slurry through a mat forming and pressing zone, followed by a mat washing zone. In the mat washing zone, the mat is washed with liquid from a first source and then washed with liquid from a second source. A washing baffle has a first portion extending from its upstream end partially along the outside surface of the drum and slightly spaced from the outside surface of the drum. This first portion is followed by a second portion extending partially along the outside surface of the drum and spaced further from the outside surface of the drum than the first portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.