Treatment of produced water with seeded evaporator
US10221670B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 2013 |
| Grant date | Mar 5, 2019 |
| Priority date | — |
| Expiry date | Jun 16, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Produced water, for example from a steam assisted gravity drainage (SAGD) or cyclic steam stimulation (CSS) heavy oil recovery operation, is treated to recover water that is re-used to create steam. The produced water is treated in one or more thermal treatment devices such as an evaporator and a crystallizer. The thermal treatment device is seeded, for example with a calcium or magnesium salt. The thermal treatment device produces a blowdown or slurry comprising super-saturated solids and organic compounds. A solvent is added to the blowdown or slurry. The solids precipitate and are separated from the blowdown or slurry. The solvent may be recovered for re-use in treating more blowdown or slurry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.