Basic Overview of Decanter Centrifuge
Decanter centrifuge, known as horizontal screw centrifuge, is a kind of high-efficiency centrifugal separation equipment. It utilizes the density difference between solid and liquid phases, and accelerates the settling speed of solid phase particles under the action of centrifugal force, thus realizing solid-liquid separation. Decanter centrifuge has the characteristics of compact structure, continuous operation, smooth running, strong adaptability, large production capacity, easy maintenance and so on.
Working principle of decanter centrifuge
The working principle of decanter centrifuge is that the drum and screw rotate at high speed in the same direction with a certain differential speed, and the material is continuously introduced into the inner cylinder of the feeding screw from the feeding pipe and accelerated into the drum. Under the action of centrifugal force field, the heavier solid-phase material is deposited on the wall of the drum to form a slag layer, which is pushed to the cone end of the drum by the spiral pusher and discharged. The lighter liquid phase forms the inner liquid ring, which overflows continuously from the overflow port at the big end of the drum, thus realizing solid-liquid separation.
Decanter centrifuge in the water treatment plant applications
1.Sludge dewatering:Decanter centrifuge is mainly used for sludge dewatering treatment in water treatment plant. Through the centrifugal force generated by high-speed rotation, the water in the sludge is separated out, so that the water content of the sludge is significantly reduced, which is convenient for subsequent treatment and disposal.
2. Solid-liquid separation: In addition to sludge dewatering, decanter centrifuge can also be used for a variety of solid-liquid separation of floating liquid. For example, in the process of sewage treatment, it can remove the solid particles floating in the water and improve the quality of the effluent.
3. Automatic operation: modern decanter centrifuge is controlled by automatic programming, which can realize continuous feeding, separating, washing and discharging under full-speed operation, greatly improving the working efficiency and stability.
4. Environmental benefits: decanter centrifuge is also widely used in environmental protection. By reducing the water content of sludge, the volume and weight of sludge can be significantly reduced, reducing transportation and disposal costs. At the same time, improving the effluent water quality also helps to protect the water environment.
Decanter centrifuge selection and considerations
1. rotational speed: the rotational speed of the decanter centrifuge is an important factor affecting the separation effect. Generally speaking, the higher the rotational speed, the higher the separation factor, the better the separation effect. However, it should be noted that do not exceed the maximum speed in the nameplate or manual of the equipment.
2. Material: different materials of decanter centrifuge has different wear resistance, corrosion resistance and other physical and chemical indicators. When choosing, it should be selected according to the actual working conditions and material characteristics.
3. Differential speed control: the control precision of the differential has a great influence on the adaptability of the material. The higher the precision of differential speed, the better the adaptability of the material. Therefore, in the selection should choose the equipment with high differential speed precision.
4. Installation and maintenance:When installing the decanter centrifuge, it should ensure that its body is in a horizontal state, and should be operated and maintained in strict accordance with the manufacturer’s recommendations. At the same time, the equipment should be regularly inspected and maintained to ensure its long-term stable operation.
Decanter centrifuge plays an important role in water treatment plant. Through reasonable selection and correct operation and maintenance, it can give full play to its high efficiency and stable separation performance, and provide a strong guarantee for the operation of water treatment plants.