Water Treatment Sludge Dehydration Solid-Liquid Separation

It is suitable for solid-liquid separation, particle size fractionation, liquid phase clarification and sludge dehydration of various suspensions in various industrial sectors. It is widely used for the separation of suspensions with solid phase particle size of 0.005 ~ 5 mm and volume concentration of 1 ~ 40%. It is particularly suitable for difficult liquid-solid separation conditions with small solid particle size and small density difference between solid and liquid phases (solid-liquid specific gravity difference > 0.05). It can also be used for liquid-liquid two-phase or liquid-solid, liquid-solid three-phase separation. Therefore, it has been widely used in modern industrial processes and is widely used in chemical, food, light industry, papermaking, mining and other industrial sectors.

Working principle

The machine starts and accelerates automatically. When the proper working conditions are met and the rotating drum reaches the feeding speed, the feed valve opens and allows the suspension to be separated to enter the product chamber of the screw feeder through the feed pipe. After the initial speed-up, the suspension passes through the outlet of the compartment and enters the drum. Due to the centrifugal force, the suspension in the drum is quickly separated into two phases; the heavier solid phase is deposited on the inner wall of the drum and driven by the differential gear, which causes the non-synchronous movement between the screw feeder and the drum. The solid phase will be transferred to the small end for further dehydration and finally discharged through the solid phase outlet. The separated liquid flows out through the large end or will be discharged by a centrifugal pump.

The sludge is first fed into the flow control tank and then flows down into the flocculation tank, where polymer coagulants are added. The flocculated sludge overflows from there into the dewatering barrel, where it is filtered and compressed. The entire operation sequence, including sludge feed control, polymer supplementation, dosing and sludge cake discharge, is controlled by the PLC’s built-in timer and sensors.