Device and method for reducing volume of aqueous waste effluents
US4828717A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1988 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Apr 14, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S159/901
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The device for reducing the volume of an aqueous waste effluent includes a holding tank, a heating tank for receiving waste effluent from the holding tank and including a heater for heating the waste effluent to a predetermined temperature which is below the boiling point of water and high enough to cause a portion of the water to evaporate and be discharged as water vapors, an agitation pump for continuously recirculating the liquids contents of the heating tank and filter units mounted on top of the heating tank for separating solids and particulate matter from the resulting slurry and returning the filtrate to the heating tank. During operation, a transfer pump transfers waste effluent from the holding tank to the heating tank, the heater is turned off after a predetermined heating cycle to allow the slurry to cool to a temperature which promotes precipitation of dissolved solids, a filter pump thereafter periodically introduces a predetermined quantity of the cooled slurry into a filter unit and the filtrate drains back into the heating tank, and the heating, cooling and filter cycles are repeated. The solids collected in the filter unit(s) can be refined to recover valuable me…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.