Filter Press Technology
What happens inside a filter press during one cycle, from feed to cake release.
Pressure, cloth and time: the three things a press trades against each other to make cake.
- Pressure
- 0.6 – 1.6 MPa
- Cake thickness
- 25 – 40 mm
- Cycle
- 20 – 60 min
Why this matters
Pressure, cloth and time: the three things a press trades against each other to make cake.
A cycle has three phases. Feed fills the chambers and builds the cake on the cloth, the pumping phase pushes water through while the cake thickens, and the closing unit holds the stack shut against that pressure. Cycle time and cake moisture trade against each other, and the cloth sets both.
Key engineering points
-
The closing end holds the stack
A hydraulic cylinder closes the plate pack and keeps it closed against the feed pressure.
-
Feed pressure builds the cake
Slurry fills each chamber and the solids build up on the cloth from both sides.
-
Cloth choice decides the cycle
The cloth sets how fast water passes and how easily the cake releases.
Process flow
The stages below are the standard DELIAN sequence — the same sequence drawn as a rail and explained stage by stage.
- 01ScreeningRemove coarse solids before the slurry enters the separation circuit.
- 02DesandingRecover the sand fraction with hydrocyclones and a sand screw.
- 03ConditioningDose flocculant and mix so the fines can be filtered.
- 04Filter pressDewater the conditioned slurry in the filter press.
- 05Water recoveryReturn clear filtrate to the slurry circuit.
- 01
Screening
Remove coarse solids before the slurry enters the separation circuit.
- 02
Desanding
Recover the sand fraction with hydrocyclones and a sand screw.
- 03
Conditioning
Dose flocculant and mix so the fines can be filtered.
- 04
Filter press
Dewater the conditioned slurry in the filter press.
- 05
Water recovery
Return clear filtrate to the slurry circuit.
Related equipment
Where this is applied
Industrial Sludge Dewatering
Process and wastewater sludge dewatering, with the filtration cycle matched to the sludge chemistry.
Construction Sludge Dewatering
Excavation, diaphragm wall and wash-water sludge, reduced to a transportable cake.
Bentonite Slurry Dewatering
Turning spent bentonite suspensions into stackable cake and reusable water.
Frequently asked questions
The duty: thicker plates and higher pressure for higher throughput, lower pressure where cloth life matters more.
The stack opens plate by plate and the cake drops onto a conveyor or into a skip.
Tell us about your slurry
Every slurry is different. Send us your slurry characteristics and project requirements so our engineering team can evaluate a suitable dewatering solution.
Filter Press Technology
Tell us about your slurry
Every slurry is different. Send us your slurry characteristics and project requirements so our engineering team can evaluate a suitable dewatering solution.
- Process evaluation based on real slurry data
- Equipment and layout proposal for your capacity
- Cake moisture and water recovery targets
- [email protected]
- Phone
- +86 139 0534 1263