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Chamber filter press

A chamber filter press is a machine for separating sludges, slurry or fluids containing solids into solid ‘cake’ and liquid ‘filtrate’ parts. A filter press machine is used extensively in the treatment of waste and by-products in the food, chemical, mining and pharmaceutical industries. The cake and filtrate can be recycled back into the process, sold off for further processing or disposed of more economically.

Process examples

 

Process Points

Flow Rate

As the slurry mixture is filtered, each screen begins to block with solid particles and either the flow is reduced through the press or more pressure is required to pass the media at the same rate. The filtration process can be halted manually or at a determined flow rate, which is measured by a filtrate flow indicator. The process pump is stopped and the solid or sludge cake is removed with compressed air. The filter press process requires a pumping system which can respond to the build-up of pressure in the chamber. 

Pumping media

The solid and sludge-like nature of the media that is to be processed is often abrasive or corrosive and will harm the internal workings of pumping equipment.

Safety

Due to the nature of the media, it is imperative that any pump involved in the filtration process be seal-less as to avoid wear on perishable and abrasion sensitive components.

Customer requirements

A pumping solution is required that can deliver a flow rate of viscous and abrasive media into the chamber and can allow for changes in pressure as build-up occurs on the screens. For health & safety purposes and for continuity of production the pump needs to be seal-less and be easy to service and maintain.

Solution

The Verderair and Verderflex ranges

The Verderair series of AODD (air-operated double diaphragm) pumps have been successfully installed in a variety of industry chamber filter press processes.

Why is the Verderair AODD pump series suitable for filter press applications?

It is designed to provide a constant, non-stalling operation – As the pressure builds in the chamber the Verderair pump is self-regulating and will cut out at a predetermined pressure and/or with an alarm trigger signal from a flow sensor. As the pressure is released in the tank the pump will self-prime and return to its
original flow rate. 

The innovative Verderair pump design is seal-less and can handle abrasive and viscous, sludge-like fluids. The design of the pump reduces the chance of fluid leaking and the risk to employee safety.

Verderair pumps can be specified with a range of materials and external casings so the working life,  maintenance cycles and MTBF are maximized.

Other advantages and benefits of Verderair include

✔ It is easy to install, maintain and transport 

✔ There are a wide range of accessories such as pulsation dampeners, monitors to indicate a failed diaphragm, solenoid valve for remote operation and stroke counter.

✔ Can run dry without pump damage

✔ There is no air lubrication necessary 

✔ Up to 16 bar pressure and 1060 l/min flow

 

Why use the Verderflex range?