Centrifugal separator with recirculation of separated sludge
US4759744A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1987 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Feb 20, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB04B11/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In connection with recirculation of separated sludge to the separation chamber of a centrifuge separator there are normally flow restricting nozzles in the sludge outlets of the separation chamber. Only after all separated sludge has passed through these nozzles it is divided into one discharge flow and one recirculation flow. The invention concerns a centrifugal separator with a recirculation circuit (27, 28, 33, 39, 41, 43, 32, 30, 29) for separated sludge, which is completely free of flow restricting nozzles. The amount of separated sludge, that is allowed to leave the centrifugal separator through the outlet conduit (39) without being recirculated, is determined by setting of valves (22, 40) in the stationary outlet conduits (21, 39) for sludge and clarified liquid, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.