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在有效容积为160 L的外循环撞击流反应器(ECISR)内,以酸碱中和与氯乙酸乙酯水解的平行竞争反应为工作体系,对反应器内微观混合性能进行了研究,考察了不同的进料时间、进料位置、循环流量对该平行竞争反应副产物分布的影响,通过副产物收率即离集指数X Q的变化来表征微观混合的效果。研究结果表明:撞击区上部(400mm)进料微观混合效果最好,反应器顶部最差;当进料位置和循环流量不变时,进料时间达40 min以上,X Q不再随进料时间的延长而降低;循环流量达到6 000 L/h时,微观混合效果最佳,再升高循环流量微观混合提升已不明显。
In an external circulation impingement flow reactor (ECISR) with an effective volume of 160 L, the micromixing performance of the reactor was investigated in a parallel competitive reaction between acid-base neutralization and ethyl chloroacetate hydrolysis. The effects of Different feed time, feed position and circulating flow on the byproduct distribution of the parallel reaction, the effect of micro mixing was characterized by the change of byproduct yield, ie, the change of the set index XQ. The results show that the micro-mixing effect of the upper part of the impact zone (400mm) is the best and the top of the reactor is the worst. When the feed position and the circulating flow rate are constant, the feeding time reaches more than 40min, and the XQ no longer changes with the feeding time ; When the circulation flow reaches 6 000 L / h, the microscopic mixing effect is the best, and then the microcirculation mixing increase of the circulation flow is not obvious.