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Unveiling The Structural Principle Of Disc Centrifuge

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Structure

The disc centrifuge is mainly composed of the following parts:

1. Drum: The drum is the core component of the centrifuge, and many conical discs are installed inside it. There is a small gap between these discs so that the mixed waves can flow and separate in them.

2. Motor: The motor provides power to the centrifuge, enabling it to rotate at high speed.

3. Differential: The differential is used to control the rotation speed of the centrifuge drum, thereby controlling the magnitude of the centrifugal force.

4. Inlet and outlet devices: The inlet and outlet devices are used to inject the mixed liquid to be separated into the centrifuge and discharge the separated liquid and solid.

5. Machine cover: The machine cover is a component that connects the fuselage and the inlet and outlet devices. It is usually composed of upper cover and lower cover and other components.

6. Vertical and horizontal shafts: The vertical and horizontal shafts are the main components for transmitting power. The vertical shaft is equipped with a speed-increasing gear, and the horizontal shaft transmits the power of the motor to the vertical shaft and the drum.

7. PLC control box: The PLC control box is used to control the operating parameters of the centrifuge, such as rotation speed, separation time, etc., to achieve automated management.

Principle

The working principle of the disc centrifuge is based on the action of centrifugal force. When the motor is started, the drum starts to rotate at high speed. The mixed liquid enters the drum from the top of the centrifuge through the feed pump. Under the action of strong centrifugal force, the mixed liquid is evenly distributed in the flow channel between the discs. Since the solids and liquids in the mixed liquid have different densities, they are subjected to different centrifugal forces in the centrifugal field, resulting in different sedimentation speeds.

Specifically, solids with larger specific gravity will move downward along the disc wall and accumulate in the sediment area. Liquids with smaller specific gravity will move along the disc wall to the upper part of the disc and finally be discharged by the centrifugal pump at the top. In this way, solids and liquids are effectively separated.

In addition, the disc centrifuge is also equipped with a slag discharge device. When the solids in the drum reach a certain amount, the slag discharge device will automatically start and discharge the solids from the slag discharge hole of the drum into the collection tank on the cover. After the slag discharge is completed, the drum will re-enter the closed separation state and continue the next separation cycle.

 

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