A pre-separation inner cylinder for a decanter centrifuge

Abstract

The invention discloses a pre-separation inner cylinder for a decanter centrifuge, which comprises a synchronous accelerator, a feeding spiral guide vane, a column section inner cylinder, an overflow pipe, a feeding pipe and a discharge partition. This kind of pre-separation inner cylinder structure makes the material accelerate tangentially and rotate after passing through the feeding spiral guide vane. Under the action of centrifugal force, the material produces a pre-separation phenomenon of light and heavy phase separation. The heavy phase is discharged from the outlet, and the light phase material migrating to the central axis passes through the overflow pipe and is discharged from the light phase outlet after obtaining a speed close to that of the drum in the synchrotron. This structure makes the material produce light and heavy phase pre-separation in the spiral inner cylinder, and the setting of the light and heavy phase outlet conforms to the movement law of the material in the drum, which is beneficial to the separation process. The feeding screw guide vane and the synchrotron can The material is accelerated tangentially twice, which reduces the phenomenon of liquid slippage and liquid pool turbulence in the drum, thereby improving the separation efficiency.

Description

technical field [0001] The invention relates to a centrifugal separation device, in particular to a pre-separation inner cylinder for a decanter centrifuge. Background technique [0002] The decanter centrifuge is a solid-liquid separation equipment that uses the drum to drive the material to rotate to generate centrifugal force to strengthen the separation process. Compared with the plate and frame filter press and belt filter press, the decanter centrifuge has continuous operation, single machine With the advantages of large processing capacity, strong adaptability to materials, and good working environment, it is widely used in petroleum, chemical, food, pharmaceutical, metallurgical and other industries. The working principle of the decanter centrifuge can be summarized as follows: the material enters the centrifuge from the feed port, the solid phase particles in the material settle to the inner side of the drum under the action of the centrifugal field to form a slag l...

AI Technical Summary

Problems solved by technology

[0003] The role of the spiral inner cylinder in the existing decanter centrifuge design is mainly to accept, distribute and accelerate materials. The existing design ignores the pre-separation effect that the spiral inner cylinder can produce during the separation process; at the same time, during the separation process of the decanter centrifuge The tangential velocity is the key to realize solid-liquid separation, but the tangential acceleration ability of the existing spiral inner cylinder to the material is extremely poor. Migration and other problems reduce the separation efficiency of the decanter centrifuge

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