Descending bed filter
US6517712B2 · kind B2 · utility
12Cited by
37References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Sep 27, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/48
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved vertical filtration unit which includes an airlift and a washbox designed for more efficient washing of dirt particles from the filtration material. The washbox consists of a filter media shield, and a washbox skirt for washing of the filtration material. A throttling valve on the wash water discharge line regulates the overall cleaning rate of the unit. The filtered liquid is discharged via a riser pipe which feeds into a filtered liquid box before exiting the filtration unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.