Procedure and installation for conditioning and subsequent dewatering of sludge
US5366622A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1991 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Sep 20, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F11/121
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
When adding flocculant to a sludge suspension, which will be dewatered, within a pressure pipe between a feed pump and a dewatering equipment, the distance between the dosing point and the inlet of the dewatering equipment will be modified during operation, e.g. by displacing a lance carrying a dosing head within the sludge pipe or by selectively operating a number of dosing points being positioned at different distances to the dewatering equipment. In this way it is possible to adjust most optimally the retention time being available for the formation and consolidation of floc particles with regard to the present operation conditions and the type of added flocculant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.