Screw extruder for sediment dewatering in stacks

Product Review:

Screw extruder for sediment dewatering in stacks is a type of dewatering machine capable of cost reduction at sewage plant construction.

Several automatic filter grid sets are implemented into the unit, which replace traditional sieve filtration. Self-cleaning filter technology ensures continuous and stable separation of sediment from water.
Powerful squeezing force resulting from changing the screw diameter and pitch, as well as small clearances between the rotating and static rings, results in efficient sediment dewatering. It is a new type of equipment for separation of solids and liquids.

Design Principle:

Main housing of dewatering equipment consists of static and travelling rings mounted on one another. A spiral shaft passes through them and forms a filter. The forward section is the concentrator area, and the rear section is the dewatering area. The clearance between the static and moving filter rings and the pitch of spiral shaft increases gradually, moving the sediment from the concentration area to the dewatering area. While the spiral shaft rotates and delivers the sediment from the concentration area to the dewatering area, it keeps the travelling rings in constant motion, thereby cleaning the filter clearance and preventing fouling.

Following gravity flow in concentration area, the sludge is moved to the dewatering area. Through the process, as the clearances between the filters and the filtration pitch gradually decrease, and due to the blocking effect of the back pressure plate, there is significant internal pressure on the sediment, reducing its volume for sufficient dewatering.