Rotary screening of a conditioned oil sand slurry, and an improved rotary screening apparatus
US11098253B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2020 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Apr 16, 2040 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/184
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for extracting bitumen from an oil sand slurry involves limiting the size of rock and clay lumps in the slurry to a first size, conditioning the slurry in a pipeline, screening the slurry through a rotary screening apparatus to remove the lumps that are larger than a second size, and subjecting the slurry to gravity separation to separate the bitumen as a bitumen froth. A fastener assembly for securing a screen panel to a drum shell of a rotary screening apparatus includes an outer insert for insertion into an aperture of a drum shell, an inner insert for insertion through an aperture of the screen panel and into an inward facing pocket of the outer insert, and a bolt for securing together the outer and inner inserts. An insert for removable insertion into an aperture of a drum of a rotary screening apparatus defines a screening aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.