Multiphase pulp washer
US5046338A · kind A · utility
23Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1990 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Jun 13, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Multiphase washing of pulp is accomplished on a fully pressurized drum filter by employing compaction baffles to increase the consistency of the pulp mat and by providing a separate pump for each wash zone so that there is no pressure difference between the wash zones and, thus, no need for any mat contacting mechanical seal. This avoids mat disruptions and machine clogging often caused by pulp pile-up at such seals. Feed pulp of relatively high consistency is made possible by incorporation of a deflocculator and distributor in the pulp feed nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.