Method and device for treating a pulp suspension
US6071378A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1998 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Jan 16, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a method for treating a pulp suspension in which the suspension is rotated in a rotationally symmetrical, rapidly rotating and permeable screen basket so that the suspension is subjected to the influence of a centrifugal force and dewatered at the same time as the suspension is conveyed by a rotating screw along the inner wall of the screen basket. The invention is characterized in that the suspension is caused to rotate by means which are arranged at the entrance to the screen basket, and in that the outer edges of the said screw bear against or are immediately adjacent to the screen basket and rotate at a higher speed than does the screen basket so that the screw scrapes the inner wall of the screen basket. The invention also relates to a device for implementing the method, which device comprises a housing (12), a screen basket (20) which is rotatably arranged in the said housing (12) and which is provided with screen openings, a screw body (72) which is rotatably arranged in the said screen basket (20) and which is arranged with a screw blade (79), an inlet (59) to the said screen basket (20) for the pulp suspension which is to be treated, an out…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.