Design and Control of Extractive Dividing Wall Column for Separating Benzene/Cyclohexane Mixtures

Design and Control of Extractive Dividing Wall Column for Separating Benzene/Cyclohexane Mixtures
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苯/环己烷混合物萃取分隔壁塔的设计与控制

DOI:
10.1021/ie500291a
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发表时间:
2014-04
影响因子:
4.2
通讯作者:
Liu, Yuliang
Liu, Yuliang
中科院分区:
工程技术3区
文献类型:
--
作者:
Wang, Qiuyuan;Li, Lumin;Zhai, Jian;Liu, Yuliang

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本文研究了分隔壁萃取精馏分离苯和环己烷过程的设计与控制。为了帮助分离,糠醛被用作重沸物。采用带约束的多目标遗传算法,建立了能量需求最小的优化流程。提出了三种控制策略:基本控制策略采用四个组分控制器,两种改进的控制策略采用了比基本控制策略更实用的温度控制器,其中两种改进的控制策略采用了带和不带蒸汽分流比的控制器。动态仿真结果表明,这三种控制策略都能较好地抑制系统的扰动。两种改进的控制结构的动态响应表明,蒸汽分流比作为操纵变量可以保持产品纯度在其设定值时,进料扰动。
This paper considers the design and control of the separation of benzene and cyclohexane process via extractive distillation in a dividing wall column. To aid the separation, furfural is used as the heavy boiling entrainer. The optimal flow sheet with minimum energy requirements has been established using the multiobjective genetic algorithm with constrains. Three control strategies are proposed: the basic control strategy uses four composition controllers, and two improved control strategies with and without vapor split ratio use temperature controllers that are more practical in application than the basic control strategy. The dynamic simulations reveal that the three control strategies can object to the feed disturbances well. The dynamic responses of two improved control structures show that vapor split ratio as a manipulated variable can maintain the product purities at their set points when a feed disturbance is introduced.
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影响因子: 4.2
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