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Separation effect and mechanism requirements of spiral Discharge decanter centrifuge

Apr 01, 2019

The spiral Discharge decanter centrifuge is a new type of horizontal screw discharge centrifuge in the process of operation. In the process of working, the solid-liquid specific gravity difference is mainly utilized, and the centrifugal force field is used to expand several thousand times. The solid phase is settled under the action of centrifugal force, thereby realizing solid-liquid separation and discharging the body separately under the action of a special mechanism. When centrifugal filtration is easy to block the filter medium due to solid particles and the filtration resistance is too large or the fine particles are lost too much, the filter centrifuge can not achieve the ideal separation effect. At this time, the decanter centrifuge has a filter type that is incomparable. Advantage. Using the principle of centrifugal sedimentation, solid phase particles with a small particle size can be separated from the liquid phase.


A centrifuge for separating a suspension component by a centrifugal sedimentation centrifuge using a centrifugal discharge sedimentation centrifuge. The suspension added to the drum forms an annular liquid layer under the action of centrifugal force, and the solid particles therein settle on 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 sedimentation centrifuge with a high separation factor should be selected to prolong the residence time of the suspension in the drum (for example, reducing the feed amount or adopting a long length) Drums, etc.) to ensure that the separation solution is clear. The sedimentation centrifuge has a wide application, and is especially suitable for the separation of the suspension in the centrifugal filtration when the solid particles are easy to block the filter medium and the filtration resistance is too large or the fine particles are excessively lost, but the sediment has a high moisture content. The sedimentation centrifuge can be used for the separation of suspensions such as crystallization, chemical sediments, pulverized coal, etc., dewatering of various sewage sludges, and slag clarification of animal and vegetable oils.