A filter press is a piece of equipment used in liquid/solid separation. Specifically, the filter press separates the liquids and solids using pressure filtration, wherein a slurry is pumped into the filter press and is dewatered under pressure. Basically, each Filter Press is designed based on the volume and type of slurry that needs to be dewatered
The working principle of filter presses is that slurry is pumped into the machine such that solids are distributed evenly during the fill cycle. Solids build up on the filter cloth, forming the filter cake; the filtrate exits the filter plates through the corner ports into the manifold, yielding clean filtered water.
A filter press consists of a series of chambers containing square or rectangular filter plates supported in a frame. Once the filter chambers are loaded with slurry, the plates are forced together with hydraulic rams that generate pressures typically in the region of 100 psi
Each plate is covered by a material or membrane that acts as the initial filter when the press is in operation. As the solid filter cake builds up, the cake adds to the removal of fine particles. The solution coming through the filter, called the filtrate, will be very pure. If it is not wanted the filtrate can be drained away for safe disposal.
At the end of the compression, the solid filter cake can be removed. The whole process is often computer controlled to make it automatic or semi-automatic.
Types of Filter Press
- Plate and Frame
- Recessed type
The operating principle of a decanter centrifuge is based on gravitational separation. Naturally, a component with a higher density would fall to the bottom of a mixture, while the less dense component would be suspended above it. A decanter centrifuge increases the rate of settling through the use of continuous rotation, producing a gravitational force between 1000 to 4000 times that of normal gravitational force. This reduces the settling time of the components by a large magnitude, whereby mixtures previously having to take hours to settle can be settled in a matter of seconds using a decanter centrifuge. This form of separation enables more rapid and controllable results.
This is an open, non-pressurized horizontal decanter centrifuge. It features a solid horizontal bowl and scroll type conveyor, with counter current flow design. The centrifuge is designed and built to operate continuously at a standard operating bowl speed of 5300 rpm. All parts of the centrifuge in contact with the process material are made of SS 316 material except the O-rings, seals, feed tube and abrasion resistant materials. Process seals, other O-rings and seals are made of nitrile rubber, unless otherwise specified. The feed tube is comprised of stainless Steel