The screw press sludge dewatering machine, which is also commonly called sludge dewatering machine. It is a new type of environmentally friendly, energy-saving and efficient sludge treatment equipment. It is mainly used in municipal sewage treatment projects and sludge water treatment systems in petrochemical, light industry, chemical fiber, paper, pharmaceutical, leather and other industries.
The screw press sludge dewatering machine uses the principle of screw extrusion, through the strong extrusion force generated by the change of screw diameter and pitch, and the small gap between the moving ring and the fixed ring, to realize the extrusion and dehydration of sludge. A new type of solid-liquid separation equipment. The screw press sludge dewatering machine is composed of a stacked screw body, a driving device, a filtrate tank, a mixing system, and a frame.
When the screw press sludge dewatering machine is working, the sludge is lifted to the mixing tank through the sludge pump. At this time, the dosing pump also quantitatively delivers the liquid medicine to the mixing tank, and the stirring motor drives the whole mixing system to mix the sludge and medicine. When the liquid level reaches the upper level of the liquid level sensor, the liquid level sensor will get a signal at this time, so that the motor of the main body of the screw press will work, thereby starting to filter the sludge flowing into the main body of the stacked screw. Under the action of the shaft, the sludge is lifted step by step to the sludge outlet, and the filtrate flows out from the gap between the fixed ring and the moving ring.
The screw press is composed of a fixed ring, a moving ring, a screw shaft, a screw, a gasket and a number of connecting plates. The material of the stacked screw is made of stainless steel 304. The fixed ring is connected together by six screws. There are gaskets and moving rings between the fixed rings. Both the fixed rings and the moving rings are made of wear-resistant materials, so that the life of the whole machine is longer. The screw shaft is passed between the fixed rings and the moving rings, and The floating annular space is sleeved on the screw shaft.
The main body is composed of multiple fixed rings and moving rings, and the helical shaft runs through it to form a filtering device. The front section is the concentration section, and the back section is the dehydration section, which completes the sludge concentration and dehydration in one cylinder, and replaces the traditional filter cloth and centrifugal filtration methods with a unique and subtle filter pattern.
After the sludge is concentrated by gravity in the thickening part, it is transported to the dewatering part. In the process of advancing, the filter seams and screw pitch gradually become smaller, and the internal pressure generated by the blocking effect of the back pressure plate.
original source: https://www.hollyep.com/news/what-is-a-screw-press-sludge-dewatering-machine/
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