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化工学报  2014 

分壁精馏塔分离芳烃的稳态及动态研究

DOI: 10.3969/j.issn.0438-1157.2014.10.033, PP. 3993-4003

Keywords: 分壁精馏塔,芳烃,精馏,稳态,动态控制,模拟

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Abstract:

采用分壁精馏塔(DWC)严格稳态模型,对比苯、甲苯、二甲苯以及均三甲苯四组分混合物的常规分离和分壁精馏塔分离方法,稳态分析结果表明:直接序列分壁精馏塔流程较常规三塔分离序列可减小再沸器负荷18.9%,年度总成本TAC可降低13.0%,DWC有效避免了常规塔器分离过程中中间组分的返混现象。在AspenDynamic环境下对最优序列进行组分控制,结果表明组分控制可很好地应对进料流量和组分组成波动。

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