Method and apparatus of discharging a disc filter
US4943372A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1988 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | Nov 1, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D33/76
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a method and apparatus for discharging a disc filter. The method and apparatus are excellent for handling fiber suspensions in the pulp and paper industry. In earlier known means, the filter cake thickened on the filter surfaces of the disc filter is detached by means of water or compressed-air jets and the cake allowed to freely fall to an axial chute disposed below the shaft level of the filter, wherefrom the pulp most usually is transferred by means of a screw conveyor. The pulp, however, easily clogs the inlet opening of the chute, whereby pulp material accumulates in the space between the discs with harmful consequences. The above-mentioned problem is solved by arranging a conveying means (9), preferably a belt conveyor, between and/or adjacent the filter discs (6), onto which conveying means the cakes are allowed to fall freely and wherefrom the belt (9) quickly and in a forced or positive manner transfers the cakes further to a discharge chute (4) disposed on the side of the filter, thus preventing the pulp material from accumulating between the discs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.