隔壁塔分离低碳混合醇动态控制研究  

Studies on dynamic control of mixed alcohol separation by dividing wall column

作　　者：刘甜甜 周由之 武海涛 王旭 刘勇军[2] 黄伟[2,3] LIU Tian-tian;ZHOU You-zhi;WU Hai-tao;WANG Xu;LIU Yong-jun;HUANG Wei(Chemical Research Institute of Yangquan Coal Industry(group)Co.,Ltd.,Taiyuan 030000,Shanxi Province,China;Key Laboratory of Coal Science and Technology of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,Shanxi Province,China;Coal Conversion Engineering Technology Company of TYUT,Taiyuan 030024,Shanxi Province,China)

机构地区：[1]阳泉煤业(集团)有限责任公司化工研究院,山西太原030000 [2]太原理工大学煤科学与技术教育部重点实验室,山西太原030024 [3]山西太原理工煤转化技术工程有限公司,山西太原030024

出　　处：《化学工程》2020年第7期73-78,共6页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21908157);山西省重点研发计划(201803D121043);山西省自然科学基金资助项目(201801D221076)。

摘　　要：CO加氢制低碳混合醇是非石油基含碳资源再利用的重要途径之一,降低后续的分离能耗成为其工业化亟待解决的问题。文中在Aspen Dynamics平台上模拟了隔壁塔分离甲醇、乙醇、正丙醇、正丁醇的动态控制特性。在充分考虑液相分配量控制初馏塔塔顶压力的情况下,分析比较了LQR/DSB、DB/LSQR、DQR/LSB、LB/DSQR 4种动态控制策略。结果显示DB/LSQR在面对流量干扰时具有最好的控制性能。在此基础上进一步考察温度-组成的串级控制策略,结果表明,与纯组分控制相比,调节时间t和最大质量偏差A均明显减小,控制效果更佳。Mixed alcohol synthesis from CO hydrogenation is one of the most important methods for the reuse of non-petroleum carbon resources.Reducing the subsequent energy consumption of separation has become an urgent problem in industrialization.In this study,the control strategy of separation of ethanol,n-propanol and n-butanol by dividing wall column(DWC)were conducted on the platform of Aspen Dynamics.Four types of control strategies including LQR/DSB,DB/LSQR,DQR/LSB and LB/DSQR were compared when the liquid distribution was fully considered to control the top pressure of the primary distillation tower.The result shows that DB/LSQR has the best control performance under the feed-flow disturbance.Then,the cascade control strategy of temperature-composition was further investigated.The results show that compared with pure component control,the adjustment time t and maximum mass deviation A are significantly reduced,and the control effect is better.

关 键 词：混合醇 分离 隔壁塔 动态控制 AspenDynamics 

分 类 号：TQ063[化学工程]