多锥水介旋流器的流场特性及其分选效果

Flow field characteristics and separation effect of multi-cone water-only cyclone

为探明多锥水介旋流器分选原理,通过模拟锥体内部流场,分析多锥水介旋流器三维旋转流场压力、速度、湍流强度及密度分布特征,与传统水介旋流器对比分析相对应特征,获得多锥水介旋流器分选原理。结果表明:与传统水介旋流器相比,其最大切向速度为10.7 m/s,且锥体中心处湍流强度最高可达45%以上;多锥水介旋流器锥体内沿着垂直锥面工作方向和旋流器轴向方向形成不同的有效密度层,密度自上而下逐渐增大。实验得到多锥水介旋流器的可能偏差和不完善度分别为0.08 g/cm^(3)和0.17,而传统水介旋流器的可能偏差和不完善度分别为0.21 g/cm^(3)和0.31,证明多锥水介旋流器的分选精度更高。

This paper aims to investigate the separation mechanism behind a multi-cone water-only cyclone.The investigation is accomplished by analyzing the characteristics of pressure distribution,velocity distribution,turbulence intensity distribution and density distribution in the three-dimensional rotating flow field of a multi-cone water-only hydrocyclone using the numerical simulation of flow field inside the cone,analyzing the corresponding characteristics,compared with the traditional water-only hydrocyclone;and obtaining the separation principle of multi-cone water-only hydrocyclone.The results show that compared with the traditional water-only cyclone,the proposed cyclone has the maximum tangential velocity of 10.7 m/s,and the turbulence intensity of more than 45%at the center of the cone;and there form different effective density layers of the multi-cone water-only cyclone along the direction perpendicular to the cone surface and the axial direction of the cyclone,with the density increasing gradually from the top to the bottom.The experiments give 0.08 g/cm^(3) and 0.17 respectively for possible deviations and imperfections values of the multi-cone water-only cyclone,compared with 0.21 g/cm^(3) and 0.31 for possible deviations and imperfections values of the traditional water-only cyclone,demonstrating a much higher separation accuracy found in the multi-cone water-only cyclone.