Design and Control of Extractive Dividing-Wall Column for Separating Methylal–Methanol Mixture
Design and Control of Extractive Dividing-Wall Column for Separating Methylal–Methanol Mixture
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DOI：
10.1021/ie3015395
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发表时间：
2012-11
影响因子：
4.2
通讯作者：
Ming Xia;Baoru Yu;Qiaoyi Wang;Hongpu Jiao;Chunjian Xu
中科院分区：
文献类型：
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作者：
Ming Xia;Baoru Yu;Qiaoyi Wang;Hongpu Jiao;Chunjian Xu
萃取分隔壁塔的设计和控制还没有被研究，而分隔壁塔和传统萃取精馏塔的设计和控制已经被许多研究者研究。EDWC的控制比CEDC更困难，并且由于EDWC的内部结构和控制回路之间的相互作用的差异而与DWC略有不同。在这项工作中，设计和控制的EDWC的甲缩醛/甲醇分离使用商业化学模拟器（白杨Plus和白杨动态）进行了研究。首先根据年总成本（TAC）筛选最优EDWC设计;然后观察设计与控制之间的相互作用;最后给出EDWC的两种控制结构。第一个提出的基本控制结构具有四个组成控制器和一个可调的蒸汽分流比αV，可以很好地处理所有的干扰，产品纯度的小偏移，除了20%的下降。
The design and control of extractive dividing-wall columns (EDWCs) have not yet been investigated, whereas those of dividing-wall columns (DWCs) and conventional extractive distillation columns (CEDCs) have been studied by many researchers. The control of EDWCs is more difficult than that of CEDCs and somewhat different from that of DWCs because of differences in the inner structure and interactions among control loops in EDWCs. In this work, the design and control of an EDWC for methylal/methanol separation are investigated using commercial chemical simulators (Aspen Plus and Aspen Dynamics). The optimum EDWC design based on the total annual cost (TAC) is screened first; then, the interaction between design and control is observed; and finally, two control structures for the EDWC are presented. The first proposed basic control structure featuring four composition controllers and an adjustable vapor split ratio αV can handle all disturbances well with small offsets in product purities, except for a 20% de...