Method and device for treating liquid sludge and filter cakes obtained by said method
US10919783B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2014 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Sep 7, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Treating and conditioning liquid sludge and a solidified sludge cake obtained thereby are disclosed. A first emulsion of sludge is formed in an in-line container fed at a first flow rate Q owing to the impact of the sludge with air injected into the container at a rate Q′, where Q′>5Q, in a first region which has a small volume of less than 0.05 m3. The first emulsion is then transferred into a second region of the container extending over a first length, and is then discharged via a component which generates a head loss in a chamber extending over a second length. A flocculant is injected in order to obtain a second coagulated emulsion, which is at least partially degasified. The matter in suspension in the second emulsion obtained in this way is then filtered or decanted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.