文献类型：期刊文献

中文题名：微旋流混合器中液体混合特性CFD-PBM数值模拟

英文题名：Numerical simulation of liquid mixing characteristics in microcyclone mixer with CFD-PBM

作者：武洁[1];张志勇[1];李丽[2];蒋天诚[3];吴玉学[3];刘程琳[3]

机构：[1]内蒙古电力(集团)有限责任公司,内蒙古电力科学研究院分公司,内蒙古呼和浩特010020;[2]苏州聚智同创环保科技有限公司,江苏常熟215513;[3]华东理工大学,国家盐湖资源综合利用工程技术研究中心,上海200237

年份：2023

卷号：51

期号：3

起止页码：53

中文期刊名：化学工程

外文期刊名：Chemical Engineering(China)

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD_E2023_2024】；

基金：内蒙古电力科学研究院2020年自筹项目(510241200008)。

语种：中文

中文关键词：计算流体力学;聚并破碎;群体平衡模型;微旋流混合器

外文关键词：computational fluid dynamics;coalescence and breakage;population balance model;microcyclone mixer

摘要：微旋流混合器是一种由微旋流气浮演化而来的设备,可以强化物料的混合与传质。文中研究利用CFD-PBM计算模型,研究微旋流混合器内气液两相分布,考察微旋流混合器内流体颗粒粒径分布及变化特性。分别以空气和液相作为气液两相,研究不同气、液相入口流速下的流场形态与相关流体力学参数。结果表明:通入气相会诱导设备内部产生新的循环流动形态,增强宏观混合,直径大于4.0 mm的气泡无法在内筒中的旋流环境中稳定存在,并随着旋流速度逐渐减小,气泡发生聚并,最终演化为4.0—10 mm直径的气泡流出。增加液相入口速度可以增加整体流动速度,同时增加气相体积分数,气相体积分数最高可达到18%。随着气相流速增加,在微旋流混合器内筒下端形成连续空腔。
Microcyclone mixer is a kind of equipment evolved from microcyclone air flotation,which can enhance the mass transfer and mixing based on centrifugal flotation.The CFD-PBM model was used to simulate the distribution of gas-liquid two-phase in the microcyclone mixer.The flow field and the particle size distribution of the gas-phase particles in the microcyclone mixer with the different inlet flow rates of the gas and liquid phase were studied.The results show that the gas phase induces a circulating flow pattern inside the microcyclone mixer,enhancing the macroscopic mix.The bubbles with a diameter greater than 4.0 mm cannot be stable in the swirl environment in the inner cylinder.However,the bubbles converge and eventually evolve into bubbles with a diameter of 4.0-10 mm as the swirling speed gradually decreases.Increasing the liquid-phase inlet velocity increases the overall flow velocity while increasing the gas phase volume fraction,reaching up to 18%.Moreover,a continuous cavity is formed at the lower end of the inner cylinder of the microcyclone mixer with the increase of the gas phase flow rate.