To confirm if 2 phase separation decanter centrifuge can be applied for drilling fluids cleaning/ waste water treatment/ solids liquid separation project.
firstly we need to clear the pre-conditions of separation: 1) density difference (Layering inside the bowl) 2) rotary speed difference/ differential speed ( the solids and liquid can be discharged separately)

secondly we need to clear the material feeding requirement of decanter centrifuge: 1) solids content < 20%; 2)solids size < 500 microns, if not, the user could use pre-treatment equipment for primary separation, normally shale shaker, the user can use different mesh size shaker screen to control the solids content and solids size. Without adding chemicals, the centrifuge mechanical separation cut point is 2~ 7 microns.
The decanter centrifuge main components including bowl assembly, fluids collection box, main motor, back drive motor, cover, skid, inlet pipe, flushing port, fluids discharge port, gearbox, pulley with belt. The main motor drived the bowl through pulley and belt, the back drive motor drived the screw through pulley and gearbox. The bowl and screw with same rotary direction, different rotary speed, the differential speed generates. The VFD control panel with main motor, back drive motor and pump motor 3 VFD, the user can adjust the frequency of the 3 motors through PLC smart control and HMI interface. The engineer can use different frequency according to drilling fluids condition. The fluids pond depth can be adjusted as per requirement, to control the discharged solids moisture and treating capacity.

The decanter centrifuge working principal is as below:
The high speed rotating bowl generates a strong centrifugal force and sticks the solid particles with higher density on the inner wall of the bowl to form a solid layer: due to the low density of liquid, the centrifugal force is small, the liquid layer is formed inside the annular layer.