Centrifugal pulp screening device and method
US4462900A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1982 |
| Grant date | Jul 31, 1984 |
| Priority date | — |
| Expiry date | Jul 16, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D33/806
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A centrifugal pulp screen device including a perforate wall cylindrical screen, an outer enclosing housing, a centrally located stock supply conduit and a distributor for the stock including an annular distribution slice opening having a fixed lower lip and movable upper lip with the slice discharging against fixed angular vanes which direct the stock in a spiralling centrifugal flow along the inner surface of the screen with the volume of flow controlled by adjustment of the slice opening and the velocity controlled by a variable delivery supply pump and the velocity affecting the spiralling centrifugal action by impact of the stock against the vanes. A corresponding method for screening the stock is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.