Zhan Xiaobin, Yang Yili, Liang Jian, Zou Dajun, Zhang Jiaqi, Feng Luyi, Shi Tielin, Li Xiwen
State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China.
Ultrasonics. 2016 Feb;65:43-50. doi: 10.1016/j.ultras.2015.10.024. Epub 2015 Nov 2.
Based on the measurement of echo signal changes caused by different concentration distributions in the mixing process, a simple ultrasonic reflection technique is proposed for in-line monitoring of the mixing states of suspensions in an agitated tank in this study. The relation between the echo signals and the concentration of suspensions is studied, and the mixing process of suspensions is tracked by in-line measurement of ultrasonic echo signals using two ultrasonic sensors. Through the analysis of echo signals over time, the mixing states of suspensions are obtained, and the homogeneity of suspensions is quantified. With the proposed technique, the effects of impeller diameter and agitation speed on the mixing process are studied, and the optimal agitation speed and the minimum mixing time to achieve the maximum homogeneity are acquired under different operating conditions and design parameters. The proposed technique is stable and feasible and shows great potential for in-line monitoring of mixing states of suspensions.
基于混合过程中不同浓度分布引起的回波信号变化测量，本研究提出了一种简单的超声反射技术，用于在线监测搅拌槽中悬浮液的混合状态。研究了回波信号与悬浮液浓度之间的关系，并使用两个超声传感器通过在线测量超声回波信号来跟踪悬浮液的混合过程。通过对回波信号随时间的分析，获得悬浮液的混合状态，并对悬浮液的均匀性进行量化。利用所提出的技术，研究了叶轮直径和搅拌速度对混合过程的影响，并在不同操作条件和设计参数下获得了实现最大均匀性的最佳搅拌速度和最小混合时间。所提出的技术稳定可行，在悬浮液混合状态的在线监测方面具有很大潜力。
