Decanter centrifuges are used to extract (dewater) solid materials from liquids when they are mixed together in slurry. Decanter centrifuges are used in many industrial applications such as:Oil /solids separation ,Industrial and biological wastewater treatment, food processing,Fish processing, Chemical slurry.

A main drive motor supplies power to turn the centrifuge. AC drives are commonly used to power the main drive motor. There are several different types of decanter centrifuges, such as: Vertical, horizontal, or scroll (conveyor).

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Decanter centrifuge design consists of a solid container, called a bowl, which rotates at high speed. Inside the bowl tube, a screen conveyor rotates in the same direction, but at a slightly different speed. A differential gear is typically used to adjust speed.

1. The decanter centrifuge slurry is fed through a stationary pipe, which is inside a hollow shaft connected to a screw conveyor or scroll.

2. The slurry enters a feed compartment located inside of the conveyor and is forced through discharge nozzles to the bowl section.

3. Once inside the bowl, centrifugal force causes the material to separate.

4. The screw conveyor moves the solids to the tapered end where they are discharged.

5. Clear fluid flows out the other end.

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This type of centrifuge is common in the wastewater treatment plants. It is considered a continuous flow machine because it will run hours at a time.

Some decanter centrifuges are powered by a motor and gearbox combination. The gearbox provided the correct speed and torque to drive the centrifuge. Since this is a mechanical type of configuration, it is subject to frequent preventive maintenance and mechanical failures. An AC drive can provide the required torque with greater efficiency and reliability.