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Working principle of decanter centrifuge

May 17, 2019

What is the working principle of the decanter centrifuge?


The horizontally centrifuged centrifuge transports the suspended liquid continuously into the machine through the feeding pipe, and enters the rotating drum of high-speed rotation through the discharge port of the screw conveyor. Under the action of the centrifugal force field, the suspension forms a ring in the rotating drum. The liquid flow, the solid phase particles are quickly lowered to the inner wall of the drum under the action of centrifugal force, and the differential speed of the drum and the screw conveyor is generated by the differential, and the sediment is pushed by the screw conveyor to the drying zone of the cone end of the drum. The two-way extrusion of the screw conveyor thrust and the centrifugal centrifugal force component causes the sediment to be further squeezed and dehydrated, and then discharged from the small end discharge port of the drum. The depth of the liquid layer of the annular flow can be adjusted by the overflow baffle at the big end of the drum to obtain the separation effect of the sediment and the clear liquid. The separated supernatant is discharged through the overflow port, and the sediment and the separated liquid are collected into respective compartments in the casing, and finally discharged outside the machine by gravity.


In some solid and liquid separations of suspensions, after appropriate selection of flocculant type and characteristics, and added to the feed, the flocculant can promote the aggregation of suspended solid particles and accelerate the sedimentation of particles to further improve solid and liquid separation. Effect.