Such centrifuge applies to solid liquid separation of suspension liquids with solid phase particle equivalent diameter≥3 , weight concentration ratio≤10%, volume concentration ratio≤70% or solid liquid density difference≥0.05g/cm³ , SCI has different series of decanter centrifuges with bowl diameter from 200-1100mm The machine can be also sorted by bowl type, such as thickening, dewatering, classifying, clarifying etc, to be fit for different separations.

Working Principle of Decanter
Working Procedure
Decanter can use limit space to fit together different stages of separation.

Mixing and Accelerating Stage
Sludge and chemical mixes in the specially designed feed chamber and accelerates together. This prepares the sludge for best separation.

Clarifying Stage
The flocculants sediments inside the bowl under centrifugal force, the clear liquid flows out of the weir an the end of the bowl.

Pressing Stage
Conveyor pushes the solid toward the discharge end. The sludge is further pressed by centrifugal force and the water comes out of the small holes of the sludge

Double-direction Pressing Stage
In the conical part of the bowl wall, the sludge is pressed by specially designed double direction pressing effect. The specially designed conveyor produces axial pressing force and water comes out of the tiny holes of the sludge.

Control the Staying Time of Solid
In order to achieve best dewatering effect when flow rate or character of sludge changes, the solid content inside the bowl should be continuously controlled.
This is controlled by the drive system of the conveyor. The drive system of the conveyor can measure real-time the solid content inside the bowl and adjust automatically, solid discharge torque automatically compensated

Drive Technology
The reliable and excellent operation needs good cooperation of bowl drive and conveyor drive, Shanghai Centrifuge Institute researches good drive combination, which can be recommended as best design to suit different applications.

Bowl Drive System
Alternatives includes:
AC Motor+ Frequency Converter
AC Motor+ Hydraulic Coupling
Other Special Ways

Conveyor Drive System