气固错流移动床内空腔与贴壁研究现状及发展

摘要

气固错流移动床广泛应用于工业生产过程，空腔与贴壁是两种典型的非正常操作工况，限制了移动床的操作弹性。床层结构与气固两相流动特性影响空腔贴壁的形成及变化，综述了空腔与贴壁的研究现状，总结了压降、颗粒流动以及空腔贴壁的数学模型，分析了空腔贴壁的影响因素，讨论了提高错流移动床操作弹性的方法，阐明了研究中亟待解决的问题，为气固错流移动床的研究方向提供建议。%The cross-flow moving bed has been widely used in many chemical industrial processes. Unfor-tunately,its operating flexibility is usually limited due to the occurrence of the cavity and pinning. In order to provide some advice on research direction of cross-flow moving bed,the current status and development of cavity/pinning in cross-flow moving bed were reviewed. Especially,the gas pressure drop,the particle velocity as well as the cavity/pinning phenomenon were mainly introduced. Base on the analysis of the previous works,the pressing problems in the cross-flow moving bed were proposed.