Anti-leakage sealing method of double-stage material push centrifugal machine

Abstract

The invention discloses an anti-leakage sealing method of a double-stage material push centrifugal machine. The anti-leakage sealing method is characterized in that negative pressure is generated in aliquid cavity between a housing and an outer rotary drum so that in the process that an inner rotary drum does an axial reciprocating action during work of the centrifugal machine, the pressure of asolid cavity is larger than or equal to the pressure of the liquid cavity all the time; and the part, where the negative pressure is generated, of the liquid cavity is located in a drying area corresponding to an outer rotary drum filter cake concentrating part. In the working process of the centrifugal machine, the phenomenon that liquid in the liquid cavity back flows to a solid collecting cavity through a baffle, and the solid moisture percentage is increased is avoided or reduced, and therefore the solid-liquid separation effect is improved; and when the centrifugal machine stops working,an external negative-pressure pump system does not affect work such as demounting of a centrifugal machine body at all, a dynamic sealing device also retracts to reset under the effect of an elastic part, a certain distance is maintained between the dynamic sealing device and the housing, and demounting of the housing is not affected as well.

Description

technical field [0001] The invention relates to centrifuge manufacturing technology, in particular to a double-stage push material centrifuge anti-leakage sealing method. Background technique [0002] The two-stage pusher centrifuge is a solid-liquid separation device, and its casing is divided into two parts: a liquid collection chamber and a solid collection chamber. Due to the particularity of the structure, when the casing and internal components are assembled, the gap between the baffle plate of the casing and the drum should not be too small, and generally must be kept at about 10mm, otherwise it will bring great difficulties in disassembly and assembly, and even parts will be damaged. Therefore, it is difficult to design a mechanical labyrinth seal in this space. In this two-stage pusher centrifuge, the material enters the acceleration plate that rotates with the drum through the feed pipe, and is evenly distributed to the inner drum screen after being accelerated. ...

AI Technical Summary

Problems solved by technology

[0003] However, when the two-stage pusher centrifuge rotates at high speed and the inner drum reciprocates back and forth, it will generate a dynamic negative pressure in the solid collection chamber, so that the liquid will flow from the liquid collection chamber into the solid collection chamber under the action of the pressure difference, and the result will be Resulting in an increase in the residual moisture content of the solids

Images