Arrangement for washing and dewatering cellulose pulp
US8211273B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 2008 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Oct 24, 2028 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F1/78
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Washing apparatus is disclosed comprising one or possibly two co-operating cylindrical press rolls, each having a perforated outer surface. A guide surface is provided at a distance from the perforated outer surface and encloses the respective press roll in the circumferential direction over at least 225° of the roll's circumference, wherein a pulp passage is provided between the perforated outer surface and the guide surface. During operation, pulp that is fed into the pulp passage is guided in a direction of rotation of the respective press roll and is pressed in a pinch between the press rolls. The radial distance between the outer surface of the press roll and the guide surface is substantially the same throughout a portion of the pulp passage in the circumferential direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.