Water filtration technique using granular media
US5882531A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1996 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Nov 13, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D24/4684
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A water filtration technique is designed to maximize the efficient performance of a variety of granular filtration media. The technique maintains the granular filtration media in a compacted state between a perforated outer media container and a perforated inner media container, where the perforated inner media container is a smaller similitude of the perforated outer media container. In the preferred embodiment of the filtration device of the present invention, the perforated outer and inner media containers are substantially spherical. By maintaining the granular filtration media in a static-state throughout filtration, highly efficient filtration is achieved. In contrast, during the backwash function, the normal inward flow is reversed to outward radial flow and granular filtration media is agitated, fluidized and quickly and vigorously cleaned. A plurality of high-velocity centrally-located water jets create the outward radial flow during backwashing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.