Types of Nutsche Filters

Designed for use mainly in the chemical and pharmaceutical industries

Single

Single nutsche filters are designed to feed, level (press), filter, wash and empty a liquid-solid suspension all in one single unit.

Drying

Nutsche drying filters enable the same machine to filter, wash and dry a suspension.

We are specialised in the construction of agitated nutsche filters

Designed for use mainly in the chemical and pharmaceutical industries.

Enables just one machine to carry out the operations of filtering, washing, re-suspension and drying to reduce operating times and increase product quality.
The option of agitating the product facilitates intermediate washes The product of most value can be the filtered solid or liquid, depending on the process.

Continuous or batch work are both possible.

  • In continuous service, the system is supplied via a pump to maintain the necessary pressure for the filter. The residual pressure to pump liquid to other parts of the process can sometimes be used.
  • With batch work, the pressure may be with air, nitrogen or an equivalent fluid.

Main advantages of Nutsche Filters

Thanks to the filter opening system with a bayonet or superclamp, it is very easily opened after each operation, which facilitates extraction of the residual layer by cleaning the filter or by changing the filter medium after each operation.

Phases of Nutsche Filters

We recommend using an inerting system before introducing the suspension to eliminate any potentially explosive area.

The shovel is located at the top to feed the suspension. Filtration commences once the product is inside the nutsche filter. To do this, the recipient needs to be pressurised so that the pressure at the top is higher than at the bottom. The top is usually pressurised while a vacuum is created at the bottom. This pressure difference is what enables filtration to take place. The filter medium retains the solids while the liquid passes through the cake and the filtration medium to the lower part of the filter plate.

After the cake is filtered, it is levelled to prevent or close any cracks. For this stage, the plate above the cake surface is agitated and lowered. In the washing process, the washing liquid is introduced into the machine and the agitator mixes it with the cake.

The next phase is drying the cake. This is done by connecting the vacuum at the top and providing the necessary heat via the heated parts (heated tank wall, plates and filter base). The plate rotates in the opposite direction to raise the cake and improve heat transmission and so facilitate evaporation of the solvent.

The discharge port is opened and the product is automatically discharged by turning the plate. The discharge flow can be changed using the plate speed. The product can be discharged in an inert atmosphere if the product so requires.

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