Method and apparatus for improving the operation of a disc filter
US4995991A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Mar 21, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D5/046
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A disc filter and method of operating same is provided in which a liquid jet is intermittently used to detach pulp cake from the disc filter. In operation, mechanical or electrical means actuate a nozzle to spray pressurized fluid at a portion of the boundary between the surface of each disc filter segment and its associated pulp cake. The nozzle is actuated to begin spraying as respective segments move into register with the nozzle and are cause to discontinue spraying prior to moving out of register when the loosened pulp cake falls from the segments by gravity. the improved control of pulp cake removal reduces use of washing fluid and results in improved pulp cake consistency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.