The flow characteristics of impinging stream from an impinging stream reactor with 160 L effective capacity were studied. With water as medium and potassium chloride saturated solution as tracer, the influences of impinging velocity and nozzle distance on the concentration of tracer were measured by conductive method. The mean residence time distribution was simulated by a tanks-in-series model for calculating the exit concentration of the impinging area in the reactor. The calculated results show that the model can finely describe the residence time distribution and the exit concentration very well. The experimental results indicate that the number of tanks and the mean residence time decrease with the decrease of the nozzle distance, increase with the increase of impinging velocity. The flow in the reactor is complete mixed flow when impinging velocity is 2. 0 m/s. The macro-mixing process in the reactor is improved obviously when the impinging velocity is increased.%为研究撞击区的流动特性,在有效容积为160 L的撞击流反应器内,以水为介质,饱和KCl溶液为示踪剂,用电导法测定了不同导流筒出口间距和撞击流速下的示踪剂浓度曲线,并通过多釜串联模型拟合得到了撞击区的平均停留时间及模拟釜数.结果表明:导流筒出口间距减小,撞击流速增大,撞击区平均停留时间减小,釜数减小；撞击流速为2.0 m/s时,撞击区内流型接近于全混流.停留时间分布主要受撞击流速的影响,增大流速有利于促进撞击区中的宏观混合.
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