Granular media filter including media settler assembly
US5779895A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1997 |
| Grant date | Jul 14, 1998 |
| Priority date | — |
| Expiry date | Jan 22, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03D1/242
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A granular media filter including a settler assembly for reducing media loss during high-turbulence washing of media in the granular media filter. The settler assembly is comprised of plates, tubes, or other porous materials placed between a system of baffles and a conventional backwash trough. The settler assembly reduces turbulence near the overflow weir edge of the backwash trough, thereby reducing media carry over with the backwash water into the backwash trough. The trough baffle settler assembly will allow higher backwash rates per backwash with the same or lower media losses than experienced with previous trough-baffle designs, thereby reducing costs of construction and operation of granular media filter systems. The settler assembly is particularly adapted for use with granular media filters employing simultaneous application of air and water to produce a high turbulence backwash.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.