共沸精馏隔壁塔与萃取精馏隔壁塔的控制研究

发布时间：2018-09-14 18:51

【摘要】：针对多元共沸物或近沸点混合物的分离,采用共沸精馏隔壁塔和萃取精馏隔壁塔两种流程,分别建立稳态模型,并进行了温度灵敏板的选择。针对共沸精馏隔壁塔建立若干两点温度控制结构,针对萃取精馏隔壁塔建立若干三点(及四点)温度控制结构。通过添加进料流量和组成扰动进行测试分析,分别为两种流程挑选了能有效抵抗进料扰动的温度控制结构。1共沸精馏隔壁塔最优控制结构:Q_(MC)/F控制TMC,13;Q_(RC)/F控制TRC,5。2萃取精馏隔壁塔最优控制结构:RRM控制TMC1,3;Q_r/F控制TMC1,12;RR_R控制TRC1,3;αv控制TMC1,9。最后通过分析两种最优控制结构的相似性,总结得出:带有再沸器与进料量比值(Q_r/F)控制的温度控制结构,可有效降低共沸精馏隔壁塔及萃取精馏隔壁塔体系的余差及超调量。
[Abstract]:For the separation of multicomponent azeotrope or near boiling point mixture, two processes of azeotropic distillation next-wall column and extractive distillation next-wall column were used to establish the steady state model, and the temperature sensitive plate was selected. A number of two-point temperature control structures were established for the azeotropic distillation next-wall column and a number of three-point (and four-point) temperature control structures for the extraction distillation next-wall column. By adding the feed flow rate and composition disturbance to test and analyze, The optimal control structure of 1 azeotropic distillation next-wall column was selected for two processes. 1. 1. The optimal control structure of the azeotropic distillation next-wall column was 1: Q _ (MC) / F control TMC,13;Q_ (RC) / F control TRC,5.2 extraction distillation next door tower optimal control structure: TRC,5.2 RRM control TMC1,3;Q_r/F control TMC1,12;RR_R control TRC1,3; 伪 v control TMC1,9. Finally, by analyzing the similarity of the two optimal control structures, it is concluded that the temperature control structure with the ratio of reboiler to feed rate (Q_r/F) can effectively reduce the residual error and overshoot of the adjoining column of azeotropic distillation and extraction distillation.
【作者单位】：青岛理工大学汽车与交通学院;中国石油大学化学(华东)工程学院;爱因霍芬理工大学化学工程学院;
【基金】：山东省自然科学基金(ZR2013EEM024) 山东省高等学校科技计划(J14LA08)项目
【分类号】：TQ053.5

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