This study investigated the effect of multiple impeller designs and configurations on the Sauter mean diameter and the uniformity of droplet size in a 100 L scale stirred tank. By using a borescope installed inside the tank, droplet images of a highly turbid liquid-liquid system were captured even at high impeller speeds, and by adjusting the borescope position, it could be observed how the droplet size changed depending on the position. The area of the flow pattern produced by the impeller was taken as an impeller region, and it explained well the change in the droplet size due to the varying liquid phase volume and impeller spacing. In addition, the change of the Sauter mean diameter and the droplet size uniformity was also elucidated by the variation of the impeller diameter, blade angle, and number of impellers. All three parameters showed a decrease in the deviation between droplet sizes as they increased, but increasing the impeller diameter was the most effective in reducing the Sauter mean diameter itself.

本研究调查了多叶轮设计和配置对 100 L 规模搅拌罐中 Sauter 平均直径和液滴尺寸均匀性的影响。通过使用安装在罐内的管道镜，即使在高叶轮速度下也能捕捉到高度混浊的液-液系统的液滴图像，通过调整管道镜的位置，可以观察液滴尺寸如何随位置变化。将叶轮产生的流型面积作为叶轮区域，很好地解释了由于液相体积和叶轮间距变化引起的液滴尺寸变化。此外，Sauter平均直径和液滴尺寸均匀性的变化也可以通过叶轮直径、叶片角度和叶轮数量的变化来阐明。