Jan 29

As we talked before, together with the Shale Shaker, Desilter, Desander, Decanter Centrifuge is also one of the most widely used solids control equipment for treating the drilling fluid and other kinds of slurries.

In this article, we will mainly introduce the structure and working principle of decanter centrifuge. The other knowledge about the centrifuge like its types, functions, symbols, configurations will be introduced one by one in the next updates.
1. Structure:
By referring to the above picture, we could see the centrifuge is mainly composed by the following parts:
Inlet Pipe, Bearing Blocks, Drum, Helical Pusher, Collection Box (encloser), Gear Differential, Power Equipment (usually the motors are used).

Decanter Centrifuge

2. Working Principle:
• Both of the Drum and Helical Pusher rotate at a high speedwhen the decanter is working, normally their speeds are all above 3000RPM. And there is a differential speed between the Drum and Helical Pusher, usually the Helical Pusher is 40r slower than the Drum per minutes;
• The pump circulates the fluid from the mud tank to go into the helical pusher;
• The fluid is speeded up in the helical pusher and next goes into the drum;
• Affected by the centrifugal force, the weightier solid particles is centrifugally throw towards the inside drum wall and form a solid-phase ring, and the lighter liquid form an inner liquid-phase ring;
• As there is a differential speed, the helical pusher pushes the solid-phase ring to the conic section of drum and finally the solid particles are discharged from the decanter; the liquid-phase is overflowed from the other end of the decanter;
• The fluid goes into the decanter and the decanter works continuously and the solids particles will be separated out and cleaner fluid will be gotten;

In the next articles, we will introduce the other knowledge about the GN’s Decanter Centrifuge.

Finally, if you want to know more about GN Solids Control, welcome to visit GN’s website and contact us.
http://www.gnsolids.com/

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