Screw dehydrator is an equipment for dehydrating thickened sludge, which doesn't contain solid impurities.
THE PRINCIPLE OF OPERATION
Auger dehydrator consists of a locculant dosing station, a locculation tank, a control box and a screw. Before entering the auger dehydrator, the sludge must be thickened in a sludge compactor. Further, sludge enters the locculation tank through the pressure pipeline. In the locculation tank, mixing of the sludge with the locculant takes place. After that, the sludge is fed into a perforated cylinder, where the screw rotates slowly with a gradual compression of the sludge. Compression occurs due to the plug of dewatered sludge, which forms at the outlet of the screw.