Tramp material removal from pulp feed system
US6332542A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2001 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | May 17, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S209/913
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Dense, tramp material, is efficiently separated in a comminuted cellulosic fibrous material feed system, for example in a chemical cellulose digester feed system, in a simple but effective matter. By merely utilizing a generally vertical conduit and a slurry flow within it (which may be augmented by high speed liquid introduction), that is caused to turn in a radiused path, centrifugal force allows separation of the tramp material into a cavity beneath the radius transition without requiring any mechanical element to engage the slurry. Appropriate purges, baffles, and discharge mechanisms may be provided. Alternatively, a tramp material separator may be built into an otherwise conventional metering screw in a digester feed system, or one or more centrifugal separators can be provided downstream of the slurry pump in a chip slurry transport system or digester feed system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.