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

The heated parts can be:

The filter wall. The filter plate. The agitating element

Features

Sectors

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.

Nutsche drying filters image gallery

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