Modular oil-based sludge separation and treatment system
US8128827B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2009 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Nov 17, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of recovering oil from oil-based sludge including the steps of homogenizing an oil-rich phase, a water-rich phase, and a solids-rich phase of an oil-based sludge, removing particulates from the oil-based sludge as the sludge traverses a shaker screen, heating the sludge, injecting a chemical into the heated sludge and mixing the chemical with the heated sludge, separating the phases of the chemically-treated sludge into a solids component stream, a water component stream, a first oil component stream, and a gas component stream, removing solids from the first oil component stream with a decanting centrifuge to form a second oil component stream, and removing water and solids from the second oil component stream with a disk stack centrifuge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.