Abstract: This paper compared the wall attrition of solid-liquid separation cyclone with the two inlet forms using particle stochastic trajectory model(DPM) of the computational fluid dynamics(CFD)software. The simulation results showed that for the solid-liquid separation cyclone with the single inlet, the most severe attrition part of the roof wall was located between the azimuth angle 140° to 210° and for the annular space wall, it was at the azimuth angle 120° and 190°;the most severe wall attrition part of the underflow port was distributed in the position of 1—2mm above the underflow port in the circumferential direction of 180°. For the solid-liquid separation cyclone with the double inlet, the attrition distribution on the wall was symmetrical;the most severe wall attrition was distributed in the underflow port;the most severe attrition of the roof wall appeared in the area of the two inlets;the azimuth angle of the most severe attrition of the roof's outer layer ranges from 80° to 110° and 260° to 290°. As for the annular space wall, the most severe attrition was at the azimuth angle 120° and 300°. In the same conditions, the wall attrition of the separation cyclone's roof wall and annular space with the double inlet was less severe but the wall attrition of the underflow port is more severe.

Key words: the separation cyclone, numerical simulation, separation, inlet, attrition

摘要： 基于计算流体力学(CFD)软件Fluent中的颗粒随机轨道模型(DPM),对两种入口形式的固液分离旋流器的壁面磨损进行数值模拟的比较,结果表明:单入口式固液分离旋流器顶板的最大磨损位于方位角140°~210°,环形空间壁面最大磨损位于方位角120°和190°,底流口附近壁面最大磨损在周向方向180°的底流口上方1~2mm位置;双入口式旋流器的壁面磨损呈对称分布,最大磨损在底流口位置,顶板壁面最大磨损在两个入口区域,顶板外层最大磨损位于方位角80°~110°和260°~290°,环形空间壁面最大磨损位于方位角120°和300°;相同条件下,双入口式旋流器顶板和环形空间的壁面磨损小于单入口式旋流器顶板和环形空间的壁面磨损;而对于底流口附近的壁面磨损,双入口式固液分离旋流器底流口附近的壁面磨损略大。

关键词: 旋流器, 数值模拟, 分离, 入口, 磨损