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利用平面激光诱导荧光技术对水平两喷嘴液?液撞击流反应器内的浓度场进行定性和定量分析,用离析度(IOS)评价时均混合效果,得到不同操作条件下IOS值沿径向射流方向的变化规律,并与三喷嘴的情况进行对比.结果表明,喷嘴间距L、喷嘴直径D和进口流量Q对反应器混合效果有重要影响,在水平两向撞击流中,当喷嘴直径和流量一定时,随喷嘴间距增大,IOS下降速度加快,最佳间距为L/D?3;当喷嘴间距和流量一定时,随喷嘴直径增大,IOS下降更快,下降到IOS?0.05所需距离不断减小,最佳喷嘴直径D?12 mm;当喷嘴直径和喷嘴间距一定时,随流量增加,IOS下降速度先增加后减小,最佳流量Q?500?10?3 m3/h.三喷嘴撞击流与两喷嘴变化趋势一致.
The planar laser-induced fluorescence technique was used to qualitatively and quantitatively analyze the concentration field of the horizontal two-nozzle liquid-liquid impingement flow reactor. The time-averaged mixing effect was evaluated by the degree of resolution (IOS) The results show that nozzle spacing L, nozzle diameter D and inlet flow Q have an important influence on the mixing effect of the reactor. In the horizontal two-way impinging flow, when the nozzle diameter and flow rate When the distance between nozzles increases, the IOS descends faster and the optimum spacing is L / D 3. When the nozzle spacing and flow rate are constant, the IOS decreases faster and decreases to IOS 0.05 when the nozzle diameter increases When the nozzle diameter and nozzle spacing are constant, with the increase of flow rate, the decreasing speed of IOS firstly increases and then decreases, and the optimal flow rate Q is 500? 10? 3 m3 / h. Three nozzle impact flow and the two nozzle changes in the same trend.