DEVELOPMENT OF A SYSTEM OF AUTOMATIC MOBILE CONTROL OF THE DISTILLATION PROCESS
DOI:
https://doi.org/10.30837/ITSSI.2020.14.094Keywords:
distillation, mobile control, predictive model, transient responses, feed trayAbstract
Subject. System of automatic mobile control of distillation process. Objective. Improving the productivity and energy efficiency of the distillation process by developing an automatic control system that provides mobile control effects on the process, as well as the study of transients in the developed system during major disturbances. Tasks. Development of a system of automatic mobile control of the distillation process, calculation of transients in the developed system, definition and evaluation of quality control indicators. Methods. Methods of simulation digital modeling of automatic control system operation. Results. A system of automatic control of the distillation process has been developed, which provides for discrete and continuous mobile control actions. Discrete effects are changes in the point of introduction of feed into the column; continuous – in changing the ratio of the flow rates of feed flows supplied to the upper and lower parts of the installation. Traditional control effects are also used by changing the heat carrier flow rate in the cube evaporator and irrigation. Optimal traditional and mobile control effects are calculated by the computing control device according to the normalized criterion using a nonlinear predictive model and are realized by influencing the actuators on the supply lines of feed flows, irrigation in the column and the heat carrier in the evaporator. The system involves the use of an adequate mathematical model, for which its periodic identification is performed and the process is monitored by additional measurement of the temperature profile of the column, temperature and pressure on the control plate. In order to maintain the material balance in the liquid and steam phases, it is planned to stabilize the pressure at the top of the column, the levels in the distillate and the cubic product receivers by changing the flow rates, of refrigerant to the condenser, distillate and cubic product. Using the example of a distillation column for separating a methanol-water mixture, the operability of the proposed automatic mobile control system is studied by digital simulation methods. The disturbances consisted of changes in the flow rate, composition, and temperature of the feed. Conclusions. It is proved that the use of the developed system allows to increase the technical and economic indicators of the distillation process and to improve the quality of management. The results can be used in the chemical, petrochemical, oil refining, food industries to control and optimize the processes of binary, multicomponent distillation.
References
Speight, J. G. (2020), "The Refinery of the Future (Second Edition). 4 – Distillation", Gulf Professional Publishing, P. 125–159. DOI: https://doi.org/10.1016/B978-0-12-816994-0.00004-X.
Ray, S., Das, G. (2020), "Process Equipment and Plant Design. Chapter 11 – Distillation", Elsevier, P. 281–350. DOI: https://doi.org/10.1016/B978-0-12-814885-3.00011-7.
Luyben, W. L. (2020), "Control of a two-pressure distillation column", Journal of Process Control, No. 92, P. 288–295. DOI: https://doi.org/10.1016/j.jprocont.2020.06.015.
Qian, X., Jia, S., Huang, K., Chen, H., Yuan, Y., Zhang, L. (2020), "Model predictive control of azeotropic dividing wall distillation column for separating furfural-water mixture", ISA Transactions. DOI: https://doi.org/10.1016/j.isatra.2020.10.068.
Shin, Y., Smith, R., Hwang, S. (2020), "Development of model predictive control system using an artificial neural network: A case study with a distillation column", Journal of Cleaner Production, No. 277, 124124. DOI: https://doi.org/10.1016/j.jclepro.2020.124124.
Tian, Y., Pappas, I., Burnak, B., Katz, J., Pistikopoulos, E. N. (2020), "Simultaneous Design & Control of a Reactive Distillation System – A Parametric Optimization & Control Approach", Chemical Engineering Science, 116232. DOI: https://doi.org/10.1016/j.ces.2020.116232.
Pataro, I. M. L., da Costa, M. V. A., Joseph, B. (2020), "Closed-Loop Dynamic Real-Time Optimization (CL-DRTO) of a Bioethanol Distillation Process Using an Advanced Multilayer Control Architecture", Computers & Chemical Engineering, No. 143, 107075. DOI: https://doi.org/10.1016/j.compchemeng.2020.107075.
Behrooz, H. A. (2019), "Robust set-point optimization of inferential control system of crude oil distillation units", ISA Transactions, No. 95, P. 93–109. DOI: https://doi.org/10.1016/j.isatra.2019.05.022.
Mello, G. N., Battisti, R., Urruth, N. S., Machado, R. A. F., Marangoni, C. (2020), "New distributed-action control strategy with simultaneous heating and cooling in trays of a pilot-scale diabatic distillation column", Chemical Engineering Research and Design, No. 159, P. 424–438. DOI: https://doi.org/10.1016/j.cherd.2020.05.001.
Kubyshkin, V. A. (2011), "Mobile control of vibrations in systems with distributed parameters", Automation and Remote Control, No. 72 (10), P. 2112–2122. DOI: https://doi.org/10.1134/S0005117911100109
Cheng, Y.-C., Yu, C.-C. (2005), "Effects of feed tray locations to the design of reactive distillation and its implication to control", Chemical Engineering Science, No. 60 (17), P. 4661–4677. DOI: https://doi.org/10.1016/j.ces.2005.03.033.
Levchuk, I. L., Sheikus, A. R., Trishkin, V. Ja. (2015), "The method of control of the distillation process using distributed control actions" ["Sposob upravleniya protsessom rektifikatsii s pomoshch'yu raspredelennykh upravlyayushchikh vozdeystviy"], Bulletin of the National Technical University "KhPI". Series: New solutions in modern technology, No. 14 (1123), P. 100-105.
Sheikus, A. R. (2019), "Distillation process optimization using continuous mobile control actions by redistributing the feed flow" ["Optymizatsiia protsesu rektyfikatsii vykorystanniam neperervnykh rukhlyvykh keruiuchykh vplyviv shliakhom pererozpodilu zhyvlennia"], Advanced Information Systems, No. 3 (3), P. 30–36. DOI: https://doi.org/10.20998/2522-9052.2019.3.04
Zajko, A. P. (1989), "The method of automatic control of a distillation column with two streams of feed" ["Sposob avtomaticheskogo regulirovanija rektifikacionnoj kolonny s dvumja potokami syr'ja"], USSR copyright certificate 1740026, No. 4761778/26, No. 22, 6 p.
Li, Y., Chen, J. (2020), "Design and control of an energy-saving phosgenation reaction distillation for toluene diisocyanate", Chemical Engineering and Processing - Process Intensification, No. 154. 107933. DOI: https://doi.org/10.1016/j.cep.2020.107933.
Sheikus, A. R. (2020), "Dynamic simulation of mobile control actions on the distillation process" ["Matematychne modeliuvannia dynamichnykh rezhymiv protsesu rektyfikatsii pry zastosuvanni rukhlyvykh keruiuchykh vplyviv"], Automation of Technological and Business Processes, No. 11 (4), P. 55–67. DOI: https://doi.org/10.15673/atbp.v11i4.1600
Sheikus, A. R. (2017), "Parametric identification of mathematical model of the process of rectification" ["Parametrychna identyfikatsiia matematychnoi modeli protsesu rektyfikatsii"], Visnyk of Vinnytsia Polytechnical Institute, No. 3, P. 32–40.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2020 Anton Sheikus
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Our journal abides by the Creative Commons copyright rights and permissions for open access journals.
Authors who publish with this journal agree to the following terms:
Authors hold the copyright without restrictions and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0) that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
Authors are able to enter into separate, additional contractual arrangements for the non-commercial and non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
Authors are permitted and encouraged to post their published work online (e.g., in institutional repositories or on their website) as it can lead to productive exchanges, as well as earlier and greater citation of published work.
