Sludge dehydrator is a new type of solid-liquid separation device which uses the screw extrusion principle. It reaches the goal of extrusion dewatering sludge by the powerful extrusion pressure of changing the screw diameter and distance, and the tiny spacing between moveable annular plates and fixed annular plates.

The main body of Sludge dehydrator is made of multiple fixed annular plates and movable annular plates with the screw shaft running through it. The front part is thickening department and the ending part is dewatering department. It can thicken and dewater sludge in one box, and replace the traditional filter clothes and centrifugal filtration method for its distinctive filter model.