Membrane Filter Press
This range of filter presses is fitted with flexible membrane plates. The outside faces of the plates are covered by a plastic diaphragm. (These membranes are welded ).
After being filtered in a conventional way in the Membrane Filter Press (usually at a low pressure of 7 bars), the membranes are inflated with water under pressure (14 bars) thereby compressing the cakes all over their surface. The filtered liquid is drained out of the filter and the cake volume is reduced in the process.
The major advantage of this kind of Automatic Membrane Filter Press is the high productivity increase (reduced cycle time) of 20% up to 52%. A better dryness compared to conventional systems (extra 10% up to 15%) and cake discharge is also noteworthy.
Filter Press allow cake washing for some sludge or slurry. This process allows to extract soluble.
Membrane filter presses sizing
The volume of filter presses is calculated in the same way as for chamber plates filter presses. It is the volume once the squeezing process is over.
Before the squeezing process, the filter press volume is thus higher. It depends on the cake thickness reduction during the squeezing process. Only tests allow to properly determine the different parameters for this kind of filter presses.
Necessary parameters to properly design the membrane filter presses
- Filtration pressure
- Filtration time
- Squeezing pressure
- Squeezing time
- Cake thickness before the squeezing process
- Cake thickness after the squeezing process
- Cake dryness and density