The main body of the dewatering machine is a filter device which is formed by the fixed ring and the traveling ring, and the spiral shaft penetrates into it. The front section is the concentration section and the latter section is the dewatering part.
The filter joint formed between the fixed ring and the moving ring and the pitch of the screw shaft gradually become smaller from the concentration to the dewatering part. The rotation of the screw shaft pushes the sludge from the concentration department to the dewatering part, and also constantly drives the swimming ring to sweep the filter seam to prevent clogging. Sludge in the enrichment department after Gravity enrichment, was transported to the dehydration department, in the process of progress with the filter seam and pitch gradually smaller, as well as the back plate blocking action, resulting in a great internal pressure, volume shrinking, to achieve the purpose of full dehydration.