化学工程Issue(8)：21-24,4.DOI:10.3969/j.issn.1005-9954.2014.08.005
振动特性对中空纤维膜组件管外传质的影响
Effect of vibration characteristics on shell-side mass transfer in hollow fiber modules
摘要
Abstract
In order to improve the mass transfer efficiency of hollow fiber modules and reduce the concentration polarization,the dynamic mesh of computational fluid dynamics software Fluent was used to study the characteristics of flow and mass transfer of a vibrating hollow fiber membrane module,and the effect of different vibration parameters on mass transfer performance was analyzed based on the process of removing oxygen from water.The numerical results show that vibration can cause secondary flow and the transition from laminar to turbulent flow, both of which enhance the collision between the fluid and the hollow fiber module and reduce the concentration polarization.So vibration is favorable to mass transfer enhancement.With the growth of vibration frequency and amplitude,the clearance rate of oxygen increases and the mass transfer performance gets better,whereas the outlet oxygen mass concentration decreases.Oxygen removal rate can be increased by 144% under a given vibration condition compared to no vibration.Oxygen removal rate is increased by 76% with the vibration frequency increased from 2.5 Hz to 10 Hz when the vibration amplitude is 6 mm,while it is only increased by 10%with the vibration amplitude increased from 2 mm to 6 mm when the vibration frequency is 2.5 Hz.Increasing the vibration frequency is more effective on the mass transfer enhancement than increasing the vibration amplitude.The results provide the theoretical guidance for practical engineering applications.关键词
中空纤维膜组件/动网格/振动/强化传质Key words
hollow fiber module/dynamic mesh/vibration/mass transfer enhancement分类
化学化工引用本文复制引用
张晓光,王士刚..振动特性对中空纤维膜组件管外传质的影响[J].化学工程,2014,(8):21-24,4.基金项目
山东省自然科学基金资助项目 （）
