Decanter centrifuges have specific characteristics when utilized for scum processing that set them apart from other types of equipment. By understanding these key features, users can optimize their use of the equipment and maximize its performance. Achieving a deep understanding of these characteristics is essential for ensuring that the decanter centrifuge operates at peak efficiency in practical applications. Continue reading →

The working principle of sludge dewatering decanter centrifuge involves high-speed rotation of the bowl and screw in the same direction, with a specific differential speed between them. The material is continuously fed into the inner cylinder of the screw conveyor via the feed pipe, where it is then accelerated and directed into the rotating bowl. Heavier solids settle on the bowl wall, forming a layer of sediment. The screw conveyor pushes the settled solids toward the conical end of the bowl, where they are discharged through the slag outlet. Meanwhile, the lighter liquid phase forms an inner liquid ring, which overflows from the large end of the bowl and exits through the liquid discharge port.

This decanter centrifuge operates continuously, allowing for the simultaneous feeding, separating, washing, and discharging of materials. It features a compact design, stable operation, high capacity, strong adaptability, and easy maintenance. It is suitable for separating suspensions with solid particles larger than 0.005 mm and concentrations ranging from 2% to 40%. It is commonly used in industries like sludge dewatering, chemicals, light manufacturing, pharmaceuticals, food, and environmental protection.

In the field of environmental protection, the decanter centrifuge is primarily used for dewatering the sludge generated during industrial and municipal sewage treatment processes. As global environmental concerns continue to rise, the importance of decanter centrifuges has become more pronounced.

Historically, sewage and treatment plants used methods like self-sedimentation or belt filter presses to dewater and concentrate sludge. Tests show that these methods can reduce the water content of sludge from 98% to 80%, decreasing its volume by up to tenfold. Thanks to its high processing capacity, automated operation, and effective dehydration performance, the decanter centrifuge has gained widespread adoption in the environmental protection sector. In fact, decanter centrifuge sales make up about half of all centrifuge sales, underscoring its indispensable role. Globally, the sludge dewatering decanter centrifuge is often the first choice for sewage treatment equipment.

The most troublesome thing about the decanter centrifuge used in industry is the corrosion that the centrifuge has encountered in the long-term use of chemical raw materials. Now we recommend three ways to avoid or slow down the corrosion of the centrifuge.

The top of the list, the selection of the raw materials for the decanter centrifuge is very important, because different materials and separation requirements require different models. After the model and main parameters are selected, based on the corrosion resistance of different materials in different environments, the physical and chemical characteristics, cost-effectiveness and other factors are summarized, and the strength data of the parts is fundamentally determined. From the perspective of the data itself, its policy materials are safe.

Second, the organization plan of the decanter centrifuge. An excellent plan can extend the service life of the equipment and ensure the safety of the equipment. Regarding structural planning, the simplest plan to accelerate corrosion is the stress concentration tendency and the crevice environment, sometimes even though metal In the immersion solution, the corrosion rate is small; but it constitutes a gap, because the chemical and electrochemical conditions of the internal solution have changed, which will cause severe crevice corrosion.

Third, one of the fundamental ideas for controlling the corrosion of the decanter centrifuge is to block the corrosive environment. In the planning of centrifuges, exterior treatment methods are often used, such as flanges, galvanizing, chrome plating, chemical plating, etc. These methods are useful in many environments, but regarding rotating parts, it is necessary to pay attention to a main appearance: The base material and the coating are two kinds of materials, and their linear expansion coefficients are different. Different deformations will occur when the rotating parts are elastically deformed, and then a lot of micro-cracks will occur; if the aforementioned appearances exist, the corrosion will be accelerated constitute. Therefore, the appearance protection methods of rotating parts should be carefully selected.

GN Separation has recently completed the manufacturing and factory testing of a tailing slurry dewatering decanter centrifuge system, which is now ready for shipment to a client in South America. Continue reading →

A decanter centrifuge is a widely used piece of equipment in laboratories, commonly applied in biology, chemistry, medicine, and various scientific research, education, and production settings. It utilizes the strong centrifugal force generated by the high-speed rotation of the rotor to separate solid particles from liquids or to separate liquid mixtures. It is particularly suitable for the rapid separation and analysis of trace samples.

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Maintaining the efficiency and longevity of a decanter centrifuge requires a thorough and systematic cleaning process. Here’s how to ensure your centrifuge remains in top condition.

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The decanter centrifuge is a high-speed rotating machine, and its safe operation and maintenance are crucial to prevent accidents and equipment damage. Below are essential safety guidelines:

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A decanter centrifuge is a highly efficient piece of centrifuge equipment. Decanter centrifuges are generally divided into two types: horizontal spiral filter centrifuges and horizontal spiral sedimentation centrifuges. Some users, however, have reported encountering issues with slow dehydration performance during operation. The specific problem involves an increase in the amount of material accumulating in the drum, which results in prolonged dehydration times and insufficient drying. This phenomenon is not uncommon, and in this article, I will analyze and attribute the possible causes of this issue. Continue reading →

Just like people, objects require regular maintenance, especially precision instruments that demand meticulous care. Proper maintenance of a decanter centrifuge not only improves its performance but can also extend its service life by three to five years. Experts emphasize that those responsible for maintaining decanter centrifuges must pay close attention to the following important aspects to ensure their longevity:

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