Continuous digester having a sectioned top separator with multiple liquor extraction ports
US6582554B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2002 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | May 13, 2022 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C7/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method is disclosed for extracting liquor from a cellulose slurry for a continuous digester comprising the steps of: providing the cellulose slurry of liquor and chips of cellulose fiber material to a separator; extracting a first stream of liquor from the separator; extracting a second stream of liquor from the separator, where the second stream has an effective alkali (EA) concentration greater than the EA concentration of the first steam; outputting the first stream from the separator and outputting the second stream from the separator separately from the second stream, and outputting a condensed slurry from the separator to a digester vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.