Decanter centrifuge with a screw conveyor having a varying pitch
US7156801B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2003 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Apr 9, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB04B2001/2041
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The decanter centrifuge comprises a screw conveyor having a body (4), which carries a screw comprising one or more flights (7, 7′) and having a nominal transport speed varying along the longitudinal axis. An inlet (6) is provided in the screw conveyor for the material to be separated. The screw conveyor is provided with a baffle (8, 8′) dividing the separation chamber in a substantially cylindrical separation part (17) and an at least partially conical discharge part (18). Immediately upstream of the baffle (8, 8′) a transition part (19) is provided between the separation part (17) and the discharge part (18), the screw conveyor (3) having a bigger nominal transport speed in the transition part (19) than in the separation part (17) immediately before the transition part (19), the change of the nominal transport speed being established by a change (21) of the screw pitch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.