Distribution of dilution liquor to the discharge of a cellulose pulp digester
US6123808A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1997 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Dec 9, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C3/24
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a pulp treatment vessel, such as a kraft pulp continuous vertical digester, a cellulose slurry is caused to flow in the vessel interior in a flow path. A substantially annular void is formed at at least one point along the flow path, and dilution or treatment liquor is introduced into the substantially annular void so that the liquor is substantially uniformly distributed about the periphery of or into the slurry. The annular void may be formed by a step out in the vessel, and the uniform introduction of dilution liquor may be accomplished utilizing one or more openings, such as a plurality of openings substantially evenly spaced around the substantially annular void, e.g. using a screen surface. The screen surface may be substantially vertical or conical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.