Backflushing system
US4244821A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 20, 1978 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Oct 20, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/75
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved system for aerating and mixing waste water which is circulated through a plurality of passages in submerged mixing chambers from an inlet to outlet of each wherein gas is mixed with the water, preferably by forming two parallel streams. To flush debris from the mixing chambers and conduits: (1) each inlet is connected to a location higher than the inlet, and at a lower pressure; (2) circulation of water is stopped; and (3) gas is continued to be forced into the passages to create backward flow of waste water through each chamber from outlet to inlet and thence to the higher location, carrying lodged debris out of the chambers and conduits. Intermittent gas flow creates pulsations which help dislodge debris.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.