压力筛性能影响因素仿真分析

Simulated Analysis of the Influence Factors on Performance of Pressure Screen

基于计算机流体动力学(CFD)技术,建立了MUS20外流式压力筛物理模型,对压力筛筛浆过程进行数值模拟,获取压力筛内速度场和压力场,分析不同操作参数下流场压力、速度的变化规律,研究转子旋翼和筛鼓之间间隙及转子的转速对浆料筛选性能和压力筛功耗的影响。结果表明,当转子旋翼和筛鼓之间间隙为3 mm时,压力筛反冲洗效果最好;当转子转速为470 r/min时,功耗相对较低。

Based on the computer fluid dynamics(CFD)technology,the physical model of MUS20 outflow pressure screen was established.The velocity and pressure fields were obtained by numerical simulation of pulp screening.The variation law of perssure and velocity of the flow field in different operation conditions was analyzed.The influences of the clearance between the foil and screen cylinder and the rotor speed on screening performance and power consumption were studied.The result indicated that the screen had the best backflushing effect when the clearance between the foils and cylinder was 3 mm,and the power consumption was comparative low when the rotor speed was 470 r/min.