In the TURBOSCREEN the advantages of the solid bowl centrifuge and the screen centrifuge 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 so the length of the drying section can be steplessly 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 dimensioned screen bowl fitted downstream. 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.
Because with the well thickened solid matter only comparatively little liquid passes into the screening section, the carry-over of very fine grains through the screen bowl is small and because of recirculation into the centrifuge cannot be rated as a loss.
The generously dimensioned screen bowl with the low solid matter content is likewise especially suited for washing. Here the washing liquid is drained off separately from the mother liquor.