Device for extracting sludge from a circular decanter
US4142977A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1977 |
| Grant date | Mar 6, 1979 |
| Priority date | — |
| Expiry date | Jun 20, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D21/2466
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A circular decanter includes a stationary hollow column rotatably supporting a bridge which spans the decanter. A trough is integral with the bridge and rotates therewith, whereby sludge drawn by vacuum from the bottom of the decanter is collected in the trough. A sludge evacuation duct is positioned centrally within the hollow column. That portion of the trough which is closest to the column is formed as a siphon having an upstream branch extending downwardly into the sludge collection chamber of the trough and a downstream branch extending downwardly into the sludge evacuation duct. An electric motor for rotating the bridge, trough and siphon is positioned above the column and includes rotating elements attached to the siphon and non-rotating elements. The power supply cables for the electric motor are led upwardly through the column, the sludge evacuation duct and the downstream branch of the siphon and are enclosed within a stationary casing and tube. The upper end of the tube is attached to the stationary elements of the electric motor. A seal in the form of a tubular member is attached to the siphon and surrounds the tube so that the tube is isolated from sludge passing throu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.