Filter underdrain with internal air scour laterals
US10143944B2 · kind B2 · utility
2Cited by
14References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 2016 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Oct 1, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D24/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Underdrain units in a sand medium or dual medium filtration system include efficient air, water and combined air/water cleaning. Air, water or both are delivered in backflow direction from a very low position on the underdrain unit, as well as water from a higher position, so as to effectively remove blocking contaminants on the outside the underdrain unit and in the surrounding filter media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.