Method of and apparatus for cleaning filters in tangential microfiltration
US5147552A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Jul 25, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2321/2025
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of and an apparatus for tangential filtration with filter cleaning in which a fluid to be filtered forms a liquid loop and circulates tangentially to one surface of a membrane at a pressure Ph in which a filtrate flows from the other surface of the membrane through a pipe, provided with a flow meter and a first valve, to a tank at atmospheric pressure Pa, filtration taking place by virtue of a positive transmembranal pressure Ph - Pa. In the filtration phase, the hydrodynamic pressure Ph is adjusted by means of a second regulable valve. During the filter cleaning phase the first valve is closed and at the same time the second valve is slightly opened, the second valve is suddenly opened, the first valve is opened and the second valve is progressively closed. The method and apparatus in particularly suited to the filtration of corrosive liquids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.