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Selection of Decanter Centrifuge

Mar. 25, 2021

Decanter Centrifuge is a settling equipment with horizontal spiral discharge and continuous operation. The working principle of this type of centrifuge is: the drum and the screw rotate at a high speed in the same direction at a certain differential speed. The material is continuously introduced into the inner cylinder of the conveying screw from the feeding pipe, and then enters the drum after being accelerated. The facies are deposited on the wall of the drum to form a sediment layer. The conveying screw continuously pushes the deposited solid phase to the cone end of the rotating drum and discharges it out of the machine through the slag discharge port. The lighter liquid phase forms an inner liquid ring, which continuously overflows the drum from the overflow port at the large end of the drum, and is discharged out of the machine through the liquid discharge port. This machine can continuously feed, separate, wash and discharge materials at full speed. It has the characteristics of compact structure, continuous operation, stable operation, strong adaptability, large production capacity and convenient maintenance.

Decanter Centrifuge

Decanter Centrifuge


Choosing the right decanter centrifuge can not only solve production problems and improve work efficiency, but also save production costs and reduce operating risks. The main factors affecting the selection are as follows:

1.The speed of the centrifuge: Generally, the decanter centrifuge should be above 3000 rpm. The higher the speed, the higher the centrifuge separation factor and the better the separation effect.

2. The material of the Centrifuge: different materials have different physical and chemical indicators such as wear resistance and corrosion resistance. The lowest material of foreign decanter centrifuges is generally 316L, or duplex stainless steel, and the abrasive components must be made of ceramic composite materials.

3. The differential speed control of the centrifuge: Different differentials have different control accuracy, and the life and maintenance costs are very different. The higher the differential accuracy, the better the adaptability to materials, so it is better to choose equipment with high differential accuracy. 

4. Length-to-diameter ratio: The larger the length-to-diameter ratio of a decanter centrifuge, the greater its processing capacity and the lower the moisture content.

5. Control system: Whether it is automatic programming control, domestic and foreign equipment manufacturers have basically realized the fully automatic control of the equipment.

6. Installed power: Affects the control of energy consumption. Generally, domestic equipment has a high energy consumption ratio and foreign energy consumption ratio is low.

7. Processing and manufacturing technology: Decanter centrifuges are separation equipment that requires high-precision processing. The products produced by companies that do not have the finishing ability have a high maintenance rate and limited processing capacity.

Environmental protection status:

In terms of environmental protection applications, the decanter centrifuge mainly refers to the dewatering of the sludge produced in the process of industrial and civil sewage treatment. Nowadays, environmental issues have become the focus of common concern all over the world. Under this background, the value of decanter centrifuges has been reflected. In the past, sewage plants or related treatment plants used self-sedimentation or belt filter presses to dehydrate and concentrate sludge. The test proves that the water content of the sludge can be reduced from 98% to 80%, and its volume can be reduced by 10 times. Because of this, the decanter decanter centrifuge has the characteristics of large processing capacity, automatic operation, and good dehydration effect in the environment. The protection field has been widely used and promoted. The single product sales of decanter centrifuges account for about half of all centrifuge products, which has established its irreplaceable position.

The company also provides a Screen Centrifuge, please feel free to contact us if necessary

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