Forward or reverse hydrocyclone systems and methods
US6003683A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1998 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Feb 2, 2018 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D5/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Hydrocyclone cleaning systems and methods remove contaminants from a suspension of papermaking stock. A subsystem 10 employs forward cleaners for removing heavy contaminants while a subsystem 12 is fed directly from subsystem 10 and removes lightweight contaminants. The subsystem 12 also includes a through-flow cleaner which receives the rejects flow from a primary reverse flow cleaner and both systems are connected to a common surge tank arrangement. Both subsystems operate at low consistencies or high efficiency while the primary through-flow cleaner of subsystem 12 provides a system output having a consistency approximately twice as high as that of the input so that the overall operation operates both as a stock cleaner and a stock thickener.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.