This paper described the study progress of the concentrating technologies for low-concentration oxygencontaining coal-bed methane,including the pressure swing adsorption,directly cryogenic liquidation,solution absorption,membrane separation,hydrate method and so on.The pressure swing adsorption technology has already more mature application cases at home and abroad,the directly cryogenic liquefaction technology has successfully realized the industrial application in the home,but the technologies of the membrane separation,low-temperature fluefectaion absorption and hydrate method are still at the research stage,and there is not any significant breakthrough and industrial application.In the paper,comparative analysis was carried out on the advantages and disadvantages of these concentrating technologies,it was deemed that these concentrating technologies can be coupled according to their advantages and disadvantages so as to form a more economical technological combination for the purifcation and application of the low-concentration oxygen-containing coal-bed methane.%介绍了变压吸附、直接深冷液化、溶液吸收法、膜分离法、水合物法等低浓度含氧煤层气提浓技术的进展情况.变压吸附技术在国内外已有较多成熟案例,直接深冷液化技术在国内也成功实现了工业化应用,而膜分离法、低温溶液吸收法、水合物法等仍在研究阶段,尚无重大突破及工业应用.对各项提浓技术的优缺点进行了对比分析,认为可根据其优缺点进行提浓技术耦合,形成更具经济性的低浓度含氧煤层气提纯利用工艺组合.
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