Factors Affecting the Performance of Decanter Centrifuge

As we know, decanter centrifuge is an common used unit in many industry. The decanter centrifuge separates solid materials from liquids in slurry and therefore plays an important role in wastewater treatment, chemical, oil and food processing industries. There are several factors that affect the performance of a decanter centrifuge and some design heuristics to be followed which are dependent upon given applications.

decanter centrifuge drawing
Decanter Centrifuge Drawing

A decanter centrifuge employs the same principles of gravitational force. However, unlike the glass mixture, the process is expedited through the use of continuous rotation. In fact, rotation provides anywhere from 1000 to 4000 times the normal gravitational force, reducing the time required for separation from hours to seconds.

The essential components of decanter centrifuge are the bowl, differential speed and scroll.

The separation medium reaches its maximum speed in the decanter bowl, causing the solids to settle on the bowl inner diameter. A characteristic feature of the bowl is its cylindrical/conical shape. Find out more about the decanter bowl.

The scroll is the transport tool in a decanter centrifuge. It rotates with a differential speed (in relation to the bowl) and transports the settled solids towards the conically narrowing end of the bowl. Find out more about the decanter scroll.

There is a differential speed between the decanter bowl and the scroll, which is created by a gear unit. The differential speed determines the solid content in the outfeed and also offers other advantages. For more information, refer to differential speed.

The effective centrifuging and fine drilled solids separation can remove significant quantities of inseparable solids. This significantly reduces the tranditional dilution requirements and drilling waste management volume.

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