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中文摘要：
模拟移动床（SMB）是混合二甲苯分离的重要技术。模拟移动床区域回流比是决定产品质量的关键参数。在真实移动床（TMB）建模方法基础上，结合实际工况数据，建立了模拟移动床吸附分离过程机理模型，并通过分析区域回流比对产品质量的影响，得到不同产品质量要求以及进料品质的情况下区域回流比的操作区间。仿真结果表明，TMB建模方法能较好地描述模拟移动床实际工况。基于机理模型对操作区间的分析结果可以为模拟移动床分离过程的工艺设计和操作提供指导意见。
英文摘要：
Simulated moving bed （SMB） is an important technology in xylene isomers separation. The reflux ratios of SMB in each zone are of key importance in determining the purity and recovery of PX. On the basis of the true moving bed （TMB） modeling scheme and industrial data, the SMB mechanism model is established. The operation interval for the reflux ratio is obtained via analyzing the effect of reflux ratio on the purity and recovery of PX product. The results show that the TMB modeling scheme performs great in describing the industrial SMB, and the analysis based on the mechanism model facilitates the design and operation of a SMB for PX separation.
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