Cyclone filter - new technology for recovery and classification of paper fibers

The patented cyclone filter is used in a wide variety of applications worldwide.

Filter concept

In the centre of the filter housing there is a filter insert.
By means of a rotor rotating around the filter insert, the internal filter basket is continuously kept free of blockages and can separate floating, suspended and sinking particles in one process step. Fine particles pass through the filter insert to the fine particle outlet, while coarse particles collect on the housing wall and are discharged at the coarse particle outlet. The tangential forces generated by the rotor support this process with a slight cyclonic effect.

The cyclone filter is suitable for separating different particle or fibre sizes (classification) and can be used as an aggregate for fibre recovery, ash removal or as a "police filter" for spray water free of foreign matter.
In contrast to alternative systems, no additional chemicals (polymers) are required. Due to the space-saving design with the smallest system volume, short flow times without additional rest or aeration zones, almost no maintenance or cleaning is required.

Pilot application

In response to demand from the Gmund handmade paper mill, the cyclone filter was
for fibre recovery from white water 2 was installed and tested. Due to the tangential inflow of the holes, the long paper fibres remain in front of the filter insert, only fines and fillers are discharged to the inside.
Thus, approx. 95% of the paper fibres can be retained and returned to the process. The filtrate contains only fines and fillers.
This is a fully automatic, closed process.

After an extensive test phase, the filter is now permanently installed and has been in successful operation for one year.