Flow Characteristics of Taylor Vortices in a New Type Liquid-liquid Countercurrent Centrifugal Extractor
Recently, a new type of liquid-liquid countercurrent extractor using a configuration of Taylor-Couette vortex flow (T-CVF) is expected to improve the contact and dispersion efficiency of extraction agents. It would reduce the amount of solvent and the extraction agent, suppressing the environmental degradation and lowering the cost. T-CVF can be typically realized as a vortex flow produced in two concentric cylinders, with the inner one rotating and the outer one being fixed. The unstable vortex formation causes fluctuations in extractor’s torque and chemical reaction time. Therefore, the understanding and control of this kind of vortex flow is necessary. Especially, for the practical usage, it is important to investigate the characteristics of T-CVF with through-flow. In this study we focused on the continuous single phase in the extractor and investigated the effects of through-flow on T-CVF structure by using an Ultrasonic Velocity Profile monitor (UVP); measuring the dynamic characteristics of the flow. This would be helpful for designing an extractor and for operations. In the case of rotating speed changing and slow through-flow, we obtained that vortex formation is roughly the same as open-end experiments having free surface, vortices forms from bottom to up. And, in the case of constant rotation speed with through-flow, we confirmed that vortices are drifting up or down depending on the direction and Reynolds number of through-flow.
Taylor-Couette vortex flow Through-flow Centrifugal extractor Ultrasonic velocity profilemonitor Flow field measurement
Hideharu TAKAHASHI Hiroshige KIKURA Kenji TAKESHITA Masanori ARITOMI
Tokyo Institute of Technology 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
国际会议
上海
英文
2074-2084
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）