Apparatus for removing liquid from the thickeners, filters, and washers
US5227058A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1992 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Oct 16, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D33/809
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of removing liquid from a thickener, a filter, a washer or the like water-separating device obviates the need for the conventional use of a long drop leg and large filtrate tank. On an upstream face of a liquid-pervious member, a layer of liquid-containing substance is formed. At a downstream face of the liquid-pervious member, a negative pressure (e.g. partial vacuum) is generated to induce the flow of a liquid or a liquid-and-gas filtrate from the liquid-containing layer through the liquid-pervious member. The filtrate is conducted from the vicinity of the downstream face of the liquid-pervious to an inlet of a filtrate pump; such conducting of filtrate is carried out through an enclosed flow passage whereby the filtrate pump generates at least a portion of the negative pressure at the downstream face of the liquid-pervious member. An apparatus for likewise removing filtrate from a thickener, a filter, a washer or the like industrial filtering device is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.