关键词: 高剪切混合器, 停留时间分布, 计算流体力学, 混合, 快速反应

Abstract: In this paper,based on computational fluid dynamics(CFD),the large eddy simulation model(LES)combined with species transport model(SPE)was successfully applied to predict the residence time distribution(RTD)of pilot plant in-line blade-screen high shear mixers(HSM). The predicted RTDs were validated against experimental data and the relative errors were less than 14%. This method was used to explore the effect of structural parameters like geometry of the holes of stator,structure of chamber and installation method on RTD to apply to fast chemical reaction processes. The results showed that the stator with circular holes was better than that with teeth or rhombus or "S" shaped holes. HSM with a reduced axial length same as the outlet diameter,volute chamber and tangential outlet was the optimal form. The rotor was eccentricly installed to improve its effect with requirement of higher power. The optimized HSM had a wide number of applications especially for the fast chemical reaction processes because of its short residence time and excellent mixing performance.

Key words: high shear mixer, residence time distribution, CFD, mixing, fast reaction