What is the principle of Unloading decanter centrifuge of the discharge sedimentation centrifuge?

- Apr 17, 2019-

The Unloading decanter centrifuge is composed of a high-speed rotating drum, a spiral and a differential that are turned to the same speed as the rotating drum, and whose rotational speed is slightly higher or lower than that of the rotating drum. When the separated suspension enters the centrifuge drum, The high-speed rotating drum produces a strong centrifugal force to settle the solid phase particles larger than the liquid phase density to the inner wall of the drum. Due to the different rotation speeds of the screw and the drum, there is relative motion between the two, and the relative motion of the spiral and the drum is used. The solid phase deposited on the inner wall of the drum is pushed toward the outlet of the small end of the drum, and the separated supernatant is discharged from the other end of the centrifuge.


The centrifugal sedimentation of the discharge sedimentation centrifuge is to add a mixture of solid and liquid to the cylindrical (or conical) rotor. Due to the centrifugal force, the solid settles in the liquid, and the settled material is further squeezed by centrifugal force. The water is removed to achieve the purpose of separating the solid and the liquid.


In gravity settlement, the acceleration of material settlement is equal to the acceleration of gravity, which is a constant value. In centrifugal settlement, the centrifugal force depends on the radius of gyration of the particle motion. Therefore, when the angular velocity is equal, the moving particles at different radius of gyrations The centrifugal force is not the same.


The suspension enters the drum from the feed pipe, and the solid phase particles are accelerated by centrifugal force to settle to the inner wall of the drum under the action of the centrifugal force field. The settled particles are pushed by the auger blades from the settling zone to the solid phase outlet. Discharge; the clarified liquid phase overflows from the overflow. Thereby achieving automatic and continuous separation of solid and liquid phases. Can be applied to different occasions such as dehydration, concentration, grading and clarification.