Pressure filter with means to detect break in pressurizing membrane
US5244567A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 17, 1992 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Apr 17, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D29/822
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pressure filter for suspensions comprises a boiler shaped outer shell (1) the front side of which is closed by a detachable lid (11), a tubular filter element (15) which projects from the lid, a membrane (5) which can be inverted arranged coaxially between the outer shell and the filter element, and a suction and pressure joint (6) arranged on the outer shell. A device for operating the filter comprises a container (25) for a hydraulic fluid (26) which fills the lower part of the container, a gas space (27) to being located above the level of the hydraulic fluid. A first line (21) with a force pump (24) conveys the hydraulic fluid from the lower part of the container to the space between the outer shell and the membrane. A second line (28) connects the space between the outer shell and the membrane with the gas space in the container and communicates with a suction pump (33). A level sensor on the container detects when the interface between hydraulic fluid and gas in the container is at an abnormal level, indicative of conditions caused by a leak in the membrane and can shutdown the pumps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.