Abstract: The cyclones have been widely used in various industrial fields because of the advantages of simple structure,convenient installation and operation. Since they have been used till now,the problem of attrition has not been solved. Although there are a lot of researches on the wear-resisting materials,the cyclones attrition problems still exist. In order to improve the wear resistance of solid-liquid cyclones,prolong the service life of cyclone,a wear-resisting cyclone with the ring seam liner was proposed. Based on computational fluid dynamics (CFD),the attrition of the cyclone was simulated using the Reynolds model and discrete phase model in ANSYS software. The simulation values of the cyclone with ring seam liner and ordinary cyclone were compared. Finally,the accuracy of the simulation was verified by wearing experiments. The results showed that the main attrition located on the entrance,connection area of the cone and cylinder,and near the underflow port of the cyclone. The rate of erosion on the surface of the cyclone wall is reduced greatly due to existence of ring seam. At the same time,the attrition on the ring seam liner has also been reduced because the concentration of the slurry is getting lower due to the relative larger particles going to the range between the ring and the cyclone wall.

Key words: cyclone, ring seam liner, computational fluid dynamics (CFD), numerical simulation, attrition

摘要： 旋流器由于结构简单、安装方便、操作便捷等优点,被广泛应用于各个工业领域。从旋流器使用以来,磨损问题就一直受到人们的极大关注,虽然在耐磨材料方面进行了大量研究,但事实表明,旋流器磨损问题仍然存在。为了提高固液分离旋流器的耐磨性,延长旋流器的使用寿命,本文提出一种环缝内衬固液分离耐磨旋流器。基于计算流体力学(CFD)方法,应用ANSYS软件中雷诺应力模型和离散相模型,对其磨损进行了模拟研究,并与普通固液分离旋流器进行对比分析,最后对模拟准确性进行实验验证。结果表明:旋流器磨损最严重的位置位于壁面入口处、圆锥体与圆柱筒体交界处及底流口附近。对于环缝内衬旋流器,由于环缝的存在,大幅度降低了旋流器壁面的磨损。另外,因为较大固体颗粒穿过环缝进入到环缝内衬和器壁的空间中,使靠近内衬的浆体浓度降低,从而也降低了环缝内衬的磨损,这一结果体现出环缝内衬旋流器的重要工程实用意义。

关键词: 旋流器, 环缝内衬, 计算流体力学, 数值模拟, 磨损