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Decanter Centrifuge Working Principle

2022-05-13

A decanter centrifuge is an industrial centrifuge that continuously separates solids from liquids. The separation in the decanter occurs due to the high centrifugal force generated by its rotating bowl.

Brightway decanter centrifuge is mainly used for Solid-liquid-liquid three-phase separation of materials. With over 10 years of experience in the separation industry, it is the most advanced type machine for 3 phase separation. It is designed for 24 hours continuous and smooth operation. It is mainly composed of driving system, decanter bowl, screw conveyor inside the bowl, cover box, skid and VFD control panel.

Brightway decanter centrifige at work

To ensure that the separation process can take place, the solid phase must be the specifically heaviest phase and the two liquid phases must have different densities. The main difference between the 2-phase decanter centrifuge and 3 phase decanter centrifuge is that the 3-phase decanter not only separate the solids but also separate two phases of the liquid.

How Does a Decanter Centrifuge Work?

A decanter centrifuge works by exerting a high centrifugal force on the slurry of solids and liquids. A rotating conveyor pushes out the heavier solids that settle on the decanter wall. The lighter liquid exits the decanter through the liquid outlet port on the other end of the bowl.

Brightway decanter centrifuge at an exhibition

Continuous process decanter centrifuges can process a large volume of fluids with sludge. Centrifugal force (upwards of 3,000 g) causes graded settling and separates the fluid from small sediment (50µ).

The rotating bowl has a concentric scroll that rotates at a speed to that of the decanter bowl. This speed differential allows the scroll to transfer the separated sludge.

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