Krauss-Maffei DCF crossflow filter
Dynamic membrane filtration
In traditional crossflow filtration, the development of a clogging layer on the surface of the filter membranes is prevented by pumping the feed. When handling sensitive or highly viscous products, this method is not efficient or not even feasible. In this case, traditional, circulating crossflow filtration technologies would not be able to concentrate liquids to a highly viscous sludge.
As dynamic crossflow filtration (DCF) is able to concentrate the retentate to a sludgy consistency, the efficiency of the separation process and yield of the valuable compound are higher than from any other crossflow technology.
ANDRITZ KMPT has made further advances in the process of DCF. In this technology, overlapping, rotating discs generate a differential speed between one another. This design creates a turbulent crossflow without using a pump to circulate the slurry. By applying wall shear stress that is at least 50% higher than in conventional crossflow systems, the formation of a clogging layer, which obstructs the permeate flow, can be avoided or at least reduced significantly.