Rotatable filter system for filtration of a flowing substance
US6258282A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2000 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Apr 10, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/48
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter and a method for filtration is based upon moving a filter surface that is caused to move through a first filtration region (FF) for separation of a prefiltrate and through a second filtration region (KF) for separation of a clear filtrate. A vacuum is applied on the filtrate side of the filtration region (KF). The filtrate region (FF) has two filtration zones (FF.sub.1 and FF.sub.2) with mutually different pressure conditions. The filtration zone FF.sub.1 has atmospheric pressure and the filtration zone FF.sub.2 has a pressure that is lower than the pressure of FF.sub.1. The pressure change between the filtration zones (FF.sub.1 and FF.sub.2) occurs in the pre-filtrate region, i.e., before the filter surface has reached the filtrate region (KF).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.