Filter press apparatus
US5482623A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Apr 21, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D25/38
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A plurality of substantially parallel filter plates are assembled as a unit and are locatable within a substantially rigid outer shell to provide a closed vessel. Either or both of the unit and the shell are movable relative to the other between a position wherein the unit is sealed within the shell to enable pressurised supply to the shell of medium to be filtered via the plates and a position wherein the unit is at least partially removed from the shell to enable discharge of resultant filter cake from the plates. To improve filter efficiency, reducing the number of plates required and the pressure required, and to allow the removal of the filter plate unit when encrusted with filter cake, substantially impermeable, flexible membrane is provided as a lining to the shell and an additional shell inlet/outlet port is provided and is connected to pressure medium supply means so that a space between the lining and the shell is inflatable by pressure medium for the duration of the filtration operation. Adjacent filter plates of the unit are separated by spacer means of elastomeric material, and the filter plates and the intervening spacer means are slidably mounted on bearers with mech…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.