用于苯/异丙醇/水分离的变压蒸馏过程控制  

Control of a Pressure-swing Distillation Process for Benzene/Isopropanol/Water Separation with and Without Heat Integration

作　　者：顾兴龙 王介 Gu Xinglong;Wang Jie(Qingdao University of Science and Technology,Qingdao 266042,China;Qingdao Jiehua Environmental Technology Co.,Ltd.,Qingdao 266042,China)

机构地区：[1]青岛科技大学化工学院,山东青岛266042 [2]青岛洁华环境科技有限公司环保部,山东青岛266042

出　　处：《山东化工》2021年第11期256-259,共4页Shandong Chemical Industry

摘　　要：用于工业废水中回收苯和异丙醇的控制过程是一个重要的课题。本项工作,研究了一种动态控制结构,该结构使用了三塔变压蒸馏法(无热集成)分离共沸水、苯和异丙醇混合物,利用成分和流量扰动来检验控制结构的性能,并开发了改进的控制结构,显示出良好的控制效果。面对三元变压精馏过程的干扰,重沸器负荷与摩尔进料流量的比值控制结构表现出良好的控制性能。改进后的无热集成控制结构比原有结构性能优越。该工作可为工业发展提供参考。Controlling the behavior of processes for the recovery of benzene and isopropanol from industrial wastewater is an important topic.In this work,a dynamic control structure is investigated for the separation of azeotropic water,benzene,and isopropanol mixtures using triple column pressure-swing distillation(without heat integration).Composition and flow disturbances are utilized to examine the performance of the control structure,and an improved control structure is developed and shows good control effects.The ratio of reboiler duty to mole feed flow rate control structure showed good control behavior in face of the disturbances for the ternary pressure swing distillation processes.The improved heatless integrated control structure is superior to the original structure This work can serve as a reference for industrial development.

关 键 词：动态控制 经济 热集成 平方误差 变压蒸馏 

分 类 号：TQ028.31[化学工程]