磁致空气分离技术的研究进展

摘要

Main research progress in magnetic air separation field was systematically reviewed . As an emerging air separation technology , magnetic air separation technology (MAST ) utilizes magnetic susceptibility difference to separate oxygen and nitrogen .MAST can be divided into three kinds according to its structure:absorption type ,side diffusion type ,and ring type .Various MAST systems were formed by the combination and cascading of these structures .Key techniques and major applications of MAST were summarized . MAST has advantages of simple structure , easy pretreatment , and low energy consumption , w hich is suitable to low concentration oxygen production . Development trends and application prospect were illustrated .Combination of MAST with traditional cryogenic distillation or membrane separation has the potential to produce high purity oxygen , w hich can improve separation efficiency with low extra energy and financial cost .%系统回顾了磁致空气分离领域的主要研究进展，磁致空气分离是一种新兴的空气分离方法，它主要利用氧氮气体的磁化率差异实现分离。按照装置结构特点可以分为吸附富集法、轨迹偏转法、磁环法3种，通过不同方法的组合级联形成了形态多样的磁致分离系统。总结归纳了利用梯度磁场进行空气分离的技术要点及适用范围，磁致分离方法装置简单、预处理方便、能耗低，与传统分离方法相比，更适宜于低纯度氧气的生产。展望了磁致空气分离的发展趋势和应用前景，为了获得更高纯度的富氧空气，可以将磁致空气分离方法与传统低温精馏、膜分离方法有机结合，花费较少的代价来有效地提高传统方法的分离效率。