Deep bed thickener/clarifiers with enhanced liquid removal
US6758978B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 5, 2002 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | May 5, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D21/2427
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The enhanced deliquifying of the compacted bed of deep bed thickener/clarifier is disclosed. Such an apparatus comprises a vessel receiving a slurry of liquid and solid particles suspended in the liquid. The vessel defines a free settling zone, a hindered settling zone intermediate, an upper clarification zone and a lower compaction zone. A deliquifying member is provided in the vessel extending up between at least two zones for facilitating the upward flow of free liquid from one of the lower zones and the settling of particulates. A rotating rake shaft with pickets are so designed to release the interstitial liquid trapped in a lower zone. The pickets provide pathways for liquid to release generally vertically. The release liquid travels upward to the deliquifying member and on into the clarification zone. The lower zone, freed of the interstitial water, further collapses becoming more concentrated or dense.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.