Solids recovery using cross-flow microfilter and automatic piston discharge centrifuge
US7628749B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 2006 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | Aug 15, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB04B2005/0485
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a system for combined centrifugation and microfiltration, retentate from a cross-flow microfilter is fed to an automatic piston discharge centrifuge for solids removal, thereby enhancing the efficiency of both processes. The centrifuge includes a cylindrical bowl having a conical lower end with an opening through which feed liquid is injected. Solids separate from the feed liquid and accumulate along the inner surface of the bowl as the bowl rotates at high speed. A microfiltration membrane can be added to improve solids retention in the bowl and provide a filtered centrate. During solids discharge, a piston is urged downward along a vertical axis. The downward movement of the piston forces accumulated solids from the bowl via the opening in the conical lower end thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.