关键词: 旋流器, 数值模拟, 分离, 入口, 磨损

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