Gravitational separator for mixtures of immiscible liquids of different densities
US4111806A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1977 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | Jan 19, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D17/0214
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved gravitational separator for mixtures of immiscible liquids of different densities, particularly oil and water, includes a reaction member in the form of a dome or diaphragm immersed in more dense liquid to be separated and which floats upwardly in the more dense liquid under the influence of liquid of less density accumulated beneath the dome or diaphragm. A coalescer screen filter system is provided in the water outlet path in the separator, the coalescer screens being contained in a chamber provided with automatically operating, one-way, pressure responsive valves to ensure proper flow of water in a forward and backflush sense through the chamber. A flotation feature for the reaction member is provided, and the reaction member includes an auxiliary air chamber to prevent loss of a minimum desired residual layer of less dense fluid beneath the reaction member when air accumulates in this area. A specific inflow and outflow conduit arrangement is provided to minimize turbulence in the separator. An oil collection system is provided to carry backflushed oil from the coalescer to the inlet conduit of the separator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.