Method and apparatus for the filtration of a suspension by a granular filtrating layer
US4720347A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1985 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Oct 3, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D24/48
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A suspension is filtered by a granular filtrating layer while flowing through the granular filtrating mass as a vertical ascending current. The granular mass is, for the purpose of being washed with air, driven continuously by a compressed air ejector into a tube where it follows an ascending motion and at the outlet of which it is washed with water above the layer where the filtration is carried out. Thereafter, the washed mass is recycled by gravity onto the upper portion of the filtration layer. The charged granular mass which has been subjected to the first or air washing operation is fluidized above the filtration layer and subjected to an extra washing operation with water and pressurized air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.