摘要
高剪切混合器作为一种能量密集型的过程强化手段,具有剪切速率高、局部能量耗散率高的特点,可以实现均质、乳化、溶解、分散、悬浮、结晶、破碎、反应等过程的强化,但尚缺少理性设计方法的系统研究。本文简述了高剪切混合器分类、工作模式,总结了操作参数、结构参数、物性参数等对高剪切混合器的流动与返混特性、微观混合特性、乳化和液液传质特性、气泡分散与气液传质特性、固体破碎与分散特性等的影响规律,简介了高剪切混合设备的工业实用案例;进而提出了该领域有待深入拓展的研究方向,包括高剪切混合器能量效率的提升途径、多相体系下高剪切混合器模型的建立方法、高剪切混合器与其他单元操作耦合规律、高剪切作用与外场协同强化机理、基于高剪切混合器的过程强化工艺优化等。
High shear mixers (HSMs), as the energy intensive process intensification technique, have the feature of high shear rates and highly localized energy dissipation rates and will provide intensifications for homogenization, emulsification, dissolution, dispersion, suspension, crystallization, pulverization and reaction, etc. However, it lacks of systematic investigation on rational design method for HSMs. We briefly introduced the category and working mode of HSMs, summarized the effects of operation conditions, structural parameters and physical properties on the flow and backmixing characteristics, micromixing performance, emulsification and liquid-liquid mass transfer property, bubble dispersion and gas-liquid mass transfer property, solid pulverization and dispersion, etc. Several industrial application cases of HSMs were presented. Then we put forward the research aspects needed in future, involving how to improve the energy efficiency of HSMs and to establish the modeling method for HSMs in multiphase systems, to disclose the coupling principles with other unit operations and to understand the synergy effect of high shearing and external field, to explore optimal intensified technologies for HSMs, etc.
作者
廖启江
秦宏云
周鸣亮
张敏卿
张金利
LIAO Qijiang;QIN Hongyun;ZHOU Mingliang;ZHANG Minqing;ZHANG Jinli(School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;FLUKO Equipment Shanghai Co., Ltd., Shanghai 201802, China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2019年第3期1160-1175,共16页
Chemical Industry and Engineering Progress
基金
国家重点研发计划(2016YFC1201505)
国家自然科学基金(21776179)
长江学者和创新团队发展计划(IRT_15R46)
关键词
高剪切混合器
过程强化
流动特性
乳化
传质
分散
微混合
工业应用
high shear mixer
process intensification
flow characteristic
emulsification
mass transfer
dispersion
micromixing
industrial application
