气隙式膜蒸馏技术研究现状和应用

Air gap membrane distillation research status and applications

在低碳经济的发展背景下,膜蒸馏技术作为一种兼具优异分离性能和节能潜力的新型分离技术而备受重视。气隙式膜蒸馏作为一种高热效率的膜蒸馏形式,其节能优势更为显著。本文总结了国内外与气隙式膜蒸馏技术相关的研究进展,从传质传热模型、数值模拟和膜组件结构几个方面指出了膜蒸馏技术的主要研究方向。重点介绍了膜蒸馏过程优化的研究和技术应用现状。膜蒸馏过程优化包括通过膜组件结构设计优化、使用改性膜、外加物理场等方式以提高膜通量或减小膜污染。在应用方面,气隙式膜蒸馏技术主要应用于海水淡化、高浓度工业废水处理和浓缩加工等领域。

As a new separation technology with excellent separation performance and energy saving potential,membrane distillation has attracted much attention under the background of the low-carbon economy.As a form of the membrane distillation with high thermal efficiency,air gap membrane distillation has more significant energy saving advantages.This paper summarized the domestic and international research progress related to air-gap membrane distillation,and the main research directions of membrane distillation technology were pointed out from the mass and heat transfer model,numerical simulation and membrane module structure.The current status of research and technology application for membrane distillation process optimization was highlighted.Membrane distillation process optimization included improving membrane flux or reducing membrane contamination through membrane module structural design optimization,the use of modified membranes,and the application of physical fields.In terms of technology application,air-gap membrane distillation technology could be applied mainly in the fields of seawater desalination,high concentration industrial wastewater treatment and concentration processing.