Separation process and scope of application of solid-liquid decanter centrifuge

- Dec 21, 2018-

The solid-liquid decanter centrifuge is a new type of horizontal screw discharge centrifuge. Its working principle is to use the solid-liquid specific gravity difference and expand it several thousand times by the centrifugal force field. The solid phase is settled under the action of centrifugal force. Thereby, solid-liquid separation is achieved, and the body is separately discharged under the action of a special mechanism. The entire feed and separation process is continuous, closed, and automated.


The drum of the solid-liquid decanter centrifuge is a closed barrel, which is suitable for a wide range of materials. For example, the viscosity of the material is large, and the small solid phase particles can achieve the requirement of solid-liquid two-phase separation by increasing the centrifugal force. The suspension added to the drum forms an annular liquid layer under the action of centrifugal force, and the solid particles therein settle onto the drum wall to form a sediment. The clarified liquid is discharged through a drum overflow or a pipette, and is referred to as a separating liquid.


At the end of the separation, the sediment is discharged manually or mechanically. During the process of sedimentation to the drum wall, the solid particles also move axially with the liquid flow. When the feed amount is too large, the liquid flows to the overflow port, and the fine particles that have not settled to the drum wall are discharged with the separation liquid. Rotate the drum to make the separation liquid turbid. For difficult-to-separate suspensions with small solid-liquid phase density difference, small solid particles or high liquid viscosity, a solid-liquid decanter centrifuge with high separation factor should be selected to prolong the residence time of the suspension in the drum to ensure the clarification of the separation liquid. .