With the continuous development of social economy and the changes in people's production and life concepts, China Drying News has also put forward some new development requirements for centrifuge technology and equipment. Since the centrifuge is in the production process of the finished product throughout the entire production process, the improvement of the quality and technology of the centrifuge directly affects the final quality and output of the relevant product.
According to reports, decanter centrifuges use solid-liquid two-phase density difference, under the action of centrifugal force, speed up the sedimentation speed of solid particles to achieve solid-liquid separation. The specific separation process is that the sludge and flocculant chemicals are fed into the mixing chamber of the drum via the inlet pipe, where mixed flocculation is performed. Due to the high speed rotation and frictional resistance of the rotor, the sludge is accelerated inside the rotor and forms a cylindrical liquid. In the ring layer, under the action of centrifugal force, the solid particles with larger specific gravity settle to the inner wall of the drum to form a mud layer. Then the solid phase is pushed to the cone end of the drum by the relative speed difference between the screw and the drum, and the sludge is pushed out after the liquid surface is pushed out. Dehydrated and dried, pushed to the slag discharge port, the supernatant was discharged from the big end of the drum to achieve solid-liquid separation.
It is understood that among the various separation devices, centrifuges have the unique advantages of small size, easy installation and use, and high purity liquid phase. At the same time, with the development of computer technology and various intelligent technologies, centrifuges are also in automatic control. Made no progress in other separation equipment. The decanter centrifuge has a high separation factor, high filtration intensity, low moisture content of the obtained filter residue, high speed, high efficiency, and low freight. Based on the above reasons, centrifuges have been widely used in the chemical, petrochemical, pharmaceutical and food industries.
In recent years, with the increasing demand for sludge dewatering, high-efficiency spiral structures have emerged. NOXON of Sweden adopts the Lamella technique of the inclined plate sedimentation principle, and designs the blade of the spiral ejector of the centrifuge to be in the best inclined state. The parameters such as the blade inclination angle, pitch and blade spacing have been optimized, the processing capacity has been improved, and the flocculant has been reduced. The consumption and mud cake moisture content.
Decanters are relatively sophisticated mechanical equipment. In order for the centrifuge to operate stably and prolong the service life of the centrifuge, the operation control and maintenance management of the equipment should be strengthened. Routine periodic inspections and maintenance are performed to keep the equipment in a good standby state. It is also possible to avoid accidental failures caused by forced shutdowns when the equipment is running, and to ensure good and stable operation of the equipment.
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