Filter Press

 

A filter press is a mechanical device used in various industries to separate solids from liquids in a slurry, where the slurry is pumped into the filter press and dewatered under pressure. It operates on the principle of pressure filtration, where a slurry is pumped into a series of filter plates and frames, creating a cake of solid particles that are trapped by the filter cloth, while the liquid (filtrate) passes through and is collected on the other side.

Key Components:

Filter Plates: Flat, porous plates that hold the filter cloth and form the chambers for holding the slurry.

Filter Cloth: A permeable fabric that allows liquid to pass through while retaining solids.

Hydraulic System: Provides the pressure needed to compress the plates together, ensuring a tight seal and efficient filtration.

Feed Pump: Pumps the slurry into the filter press chambers under pressure.

Process:

The slurry is pumped into the press, filling the chambers formed by the plates.

Pressure is applied, forcing the liquid through the filter cloth, while the solids are retained and compacted into a "filter cake."

Once the chambers are full and dewatering is complete, the press is opened, and the filter cakes are removed.

Applications: Filter presses are widely used in industries such as mining, chemical manufacturing, food processing, pharmaceuticals, and wastewater treatment to separate solids from liquids efficiently.