In a TURBOSCREEN, the advantages of solid bowl centrifuges and screen centrifuges are optimally combined in two work stages.
In the first process step the solid matter is pre-dewatered on the bowl cone in the solid bowl centrifuge section. The filling volume of the bowl, and thus the length of the drying section can be adjusted by means of a weir plate. The clarified liquid is decanted off over this weir plate.
The pre-thickened solid is discharged over a discharge edge into a much larger sized downstream screen bowl. Here at the second work stage the solids cake is broken up and redistributed with a lower head of material, proportional to the larger volume capacity.
At the same time the solids cake is subjected to considerably higher centrifugal forces, proportional to the large diameter, whereby the filtering out of the residual liquid is made easier.
Due to the well thickened solid matter comparatively little liquid passes into the screening section. The carry-over of very fine grains through the screen bowl is minimal and due to recirculation back to the centrifuge can not be rated as a loss.
The well sizes screen bowl with the low solid matter content is particularly suited for washing. Here the washing liquid is drained off separately from the mother liquor.