Theoretical analysis of fluid mixing time in liquid-continuous impinging streams reactor
来源期刊：中南大学学报(英文版)2015年第8期
论文作者：LUO Yan ZHOU Jian-qiu GUO Zhao YU Bei XIONG Hui
文章页码：3217 - 3222
Key words：impinging stream reactor; empirical model; theoretical model; mixing time; comparative analysis
Abstract: The mixing time of impact zone in liquid-continuous impinging streams reactor (LISR) is theoretically calculated by empirical model and modern micromixing model of the fluid mixing process, and the variation laws of macromixing time and micromixing time are quantitatively discussed. The results show that under a continuous and stable operating condition, as the paddle speed increases, the macromixing time and micromixing time calculated by the two models both decrease, even in a linkage equilibrium state. Simultaneously, as the paddle speed increases, the results figured by the two models tend to be consistent. It indicates that two models both are more suitable for calculation of mixing time in high paddle speed. Compared with the existing experimental results of this type of reactor, the mixing time computed in the speed of 1500 r/min is closer to it. These conclusions can provide an important reference for systematically studying the strengthening mechanism of LISR under continuous mixing conditions.
LUO Yan(罗燕)1, 2, ZHOU Jian-qiu(周剑秋)1, 2, GUO Zhao(郭钊)2, YU Bei(余蓓)2, XIONG Hui(熊卉)2
(1. School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 210009, China;
2. School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Wuhan 430073, China)
Abstract:The mixing time of impact zone in liquid-continuous impinging streams reactor (LISR) is theoretically calculated by empirical model and modern micromixing model of the fluid mixing process, and the variation laws of macromixing time and micromixing time are quantitatively discussed. The results show that under a continuous and stable operating condition, as the paddle speed increases, the macromixing time and micromixing time calculated by the two models both decrease, even in a linkage equilibrium state. Simultaneously, as the paddle speed increases, the results figured by the two models tend to be consistent. It indicates that two models both are more suitable for calculation of mixing time in high paddle speed. Compared with the existing experimental results of this type of reactor, the mixing time computed in the speed of 1500 r/min is closer to it. These conclusions can provide an important reference for systematically studying the strengthening mechanism of LISR under continuous mixing conditions.
Key words:impinging stream reactor; empirical model; theoretical model; mixing time; comparative analysis
