新型热回收气隙式膜蒸馏传热传质研究  

Study on Heat and Mass Transfer of a New Form of Heat Recovery Air Gap Membrane Distillation

作　　者：郭新瑞 马峰 吴江波 刘姝君[1] 安周建 杜小泽 GUO Xinrui;MA Feng;WU Jiangbo;LIU Shujun;AN Zhoujian;DU Xiaoze(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,兰州730050

出　　处：《工程热物理学报》2025年第1期269-275,共7页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.52130607)。

摘　　要：工业废水的处理及淡水资源的获取是当前一个重要的课题。膜蒸馏是一种有着低操作温度、常压操作、产水水质好等显著优点的新型技术。本文进行了直接接触式膜蒸馏的数值模拟,并结合相关实验对比分析了料液温度、料液浓度、孔径等因素对组件内流场及温度场分布的影响。针对直接接触式膜蒸馏热损失较大的组件结构进行改进,提出了一种新型热回收气隙式膜蒸馏组件的设计。新组件可在维持气隙温度、强化冷凝、提高渗透通量的同时,回收部分冷凝潜热,并对新型热回收气隙式膜蒸馏组件的传热传质过程进行了分析。进一步将低品位能源与膜蒸馏系统相耦合,可利用工厂余热、太阳能、地热能等能源作为热源,从而降低能耗。The treatment of industrial wastewater and the acquisition of fresh water resources are currently an important topic.Membrane distillation is new technology with many significant advantages such as low operation temperature,normal pressure operation,and high water quality.In this paper,a numerical simulation of direct contact membrane distillation is carried out,and the influence of feed inlet temperature,feed inlet concentration,membrane pore diameter on flow field and temperature field distribution is analyzed compared with experiments.A new form of heat recovery air gap membrane distillation is proposed for high heat loss direct contact membrane distillation structure.The new module can maintain the air gap temperature,strengthen condensation,and increase the permeation flux while recovering part of the latent heat of condensation.At the same time,the heat and mass transfer process of the new form of heat recovery air gap membrane distillation module are analyzed.Moreover,low grade energy and membrane distillation system are coupled.The coupled system can utilize factory waste heat,solar energy,geothermal energy as heat source,which can decrease the energy consumption effectively.

关 键 词：膜蒸馏 数值模拟 热回收 传质模型 耦合系统 

分 类 号：TK124[动力工程及工程热物理—工程热物理]