Coolant recycling system and method
US4872997A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1988 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Aug 12, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D17/0205
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In the improved system and method of the present invention, a batch of contaminated oil is deposited into a tank, with the oil preferably being passed through a filter during the depositing step to assist in removal of solids. Once the contaminated coolant has been deposited into the tank, the oil is agitated by injecting several streams of air into the bottom of the tank. This creates several bubble streams which pass upwardly through the coolant toward the surface and, during this passage, agitate the coolant and effect separation of the oil so that it rapidly rises to the coolant surface. The bubble streams are created by different sized orifice member whereby the bubbles of one stream are smaller than the bubbles in another stream. This causes differential agitation vertically through the mass of coolant, and also at the surface, whereby the tramp oil which rises to the surface tends to congregate within the small area disposed over the small bubble stream, thereby facilitating removal of the separated oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.