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Open AccessArticle

Controllability Comparison of the Four-Product Petlyuk Dividing Wall Distillation Column Using Temperature Control Schemes

College of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
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Author to whom correspondence should be addressed.
Processes 2020, 8(1), 116; https://doi.org/10.3390/pr8010116 (registering DOI)
Received: 9 December 2019 / Revised: 13 January 2020 / Accepted: 14 January 2020 / Published: 16 January 2020
(This article belongs to the Special Issue Process Optimization and Control)
An effective process intensification strategy based on dividing walls shows promising energy-saving results for distillation processes. The three-product Petlyuk dividing wall distillation columns (DWDCs) are able to save approximately 30% energy in comparison with the traditional distillation columns. Furthermore, the four-product extended Petlyuk DWDC reduces about 50% of operation costs than conventional distillation sequences. Although researchers have extensively studied control schemes for the three-product Petlyuk DWDC, relatively little work has been done on the four-product extended Petlyuk DWDC. This paper studies feasible temperature control schemes containing temperature control scheme (TC), simplified temperature difference control scheme (STDC), and simplified double temperature difference control scheme (SDTDC) for the four-product extended Petlyuk DWDC. STDC and SDTDC are introduced so as to improve the dynamic performances with simple control schemes. All three control schemes are tested against a series of feed compositions and feed rate disturbances. Dynamic performances prove that the proposed STDC and SDTDC schemes are better at handling the inserted feed disturbances. These are very encouraging results for industrialization of the four-product extended Petlyuk DWDC in the future. View Full-Text
Keywords: dividing wall distillation column (DWDC); extended Petlyuk DWDC; temperature control (TC); simplified temperature difference control (STDC); simplified double temperature difference control (SDTDC) dividing wall distillation column (DWDC); extended Petlyuk DWDC; temperature control (TC); simplified temperature difference control (STDC); simplified double temperature difference control (SDTDC)
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Qian, X.; Liu, R.; Huang, K.; Chen, H.; Yuan, Y.; Zhang, L.; Wang, S. Controllability Comparison of the Four-Product Petlyuk Dividing Wall Distillation Column Using Temperature Control Schemes. Processes 2020, 8, 116.

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