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How does a centrifuge work?

Mar 14, 2020

Centrifuge is a kind of mechanical equipment often used in chemical, power generation, light industry, pharmaceutical, food, environmental protection and other occupations.

The operating principle of the centrifuge is: the drum and the impeller rotate at high speed in the same direction at a certain differential speed, and the materials are successively introduced into the feeding screw inner cylinder by the feeding tube, and then enter the drum after acceleration. Under the effect of the centrifugal force field, the heavier solid phase Deposited on the drum wall to form a sediment layer. The conveying screw continuously pushes the accumulated solid phase to the end of the drum cone, and is discharged out of the machine through the slag discharge port. The lighter liquid material forms the inner liquid ring, which is continuously overflowed from the drum through the large-end overflow port of the drum and discharged out of the machine through the liquid discharge port. This machine can continuously feed, separate, wash and unload at full speed.

After the dust particles enter the impeller, they interact with the wall surface. In the inlet area of the centrifugal flow channel and the entire axial flow channel, the dust particles basically collide with the wall surface at a non-zero angle of attack under the effect of the airflow and the inertia induction effect. , And then bounce back into the flow channel, the wall material wear caused by this is typical erosion wear. In the exit area of the centrifugal flow channel, the dust particles have moved a long distance in the flow channel, and most of them have collided with the wall surface many times, basically sliding or rolling along the pressure surface, and there is a certain amount of pressure on the wall surface. The effect of pressure. The abrasion of the back material is abrasion-type dust particles. The concentration of dust particles in the vicinity of the pressure surface worsens the danger of dust particle wear.