隔壁塔用于苯、甲苯、二甲苯分离的控制  

Control of the DWC for separating the mixture of benzene,toluene,xylene

作　　者：李军[1] 王纯正[2] 马占华 孙兰义 

机构地区：[1]中国石油大学化学工程学院,山东青岛266580 [2]华东师范大学化学系,上海200062

出　　处：《化工进展》2013年第4期757-762,768,共7页Chemical Industry and Engineering Progress

基　　金：中央高校基本科研业务费专项资金(12CX04026A);山东省优秀中青年科学家科研奖励基金(BS2010NJ023)项目

摘　　要：在稳态模拟的基础上,研究了用于苯、甲苯、二甲苯分离的隔壁塔的控制策略和动态特性。动态模拟中采用继电反馈法和Tyreus-Luyben准则进行PID参数整定,在Aspen Dynamic平台上,对比分析了DB/LSV、DV/LSB、LB/DSV和LV/DSB 4种典型组成控制策略的动态特性,并重点考察了LV/DSB基础上的温度控制、温度组成联合控制和温度组成串级控制策略。结果表明,当出现进料组成或流率干扰时,隔壁塔具有很好的可控性,调节时间TS最短至2.97 h,产品质量要求与设定值之间的摩尔最大偏差A最低至0.0015。Control strategy and dynamic performance of dividing wall column for separating BTX were studied on the basis of steady-state simulation.PID parameters were tuned by using relay feedback test and Tyreus-Luyben settings.Comparative analysis of four typical composition control structures namely LV/DSB,DV/LSB,LB/DSV and LV/DSB were made on platform of Aspen Dynamic.Then the temperature control,temperature combined with composition control and temperature-composition cascade control strategies were inverstiagated on the basis of LV/DSB.The simulation results showed that DWCs have good controllability properties for various persistent disturbances in the feed flow rate and composition.Setting time TS and composition disturbances of the three desired products were all less than 2.97 h and 0.0015.

关 键 词：苯 甲苯 二甲苯 隔壁塔 动态模拟 控制策略 

分 类 号：TQ028.31[化学工程]