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Alternative method to prevent thermal runaway in case of error on operating conditions continuous reactor
Institution:1. LSPC—Laboratoire de Sécurité des Procédés Chimiques, EA4704, INSA Rouen, BP08, Avenue de l’Université, 76801 Saint-Etienne-du-Rouvray, France;2. Laboratory of Industrial Chemistry and Reaction Engineering, Process Chemistry Centre, Åbo Akademi University, Biskopsgatan 8, FI-20500 Åbo/Turku, Finland;1. Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 210009, China;2. School of Chemistry and Material Engineering, Changshu Institute of Technology, Changshu, 215500, China;3. University Paris-Est, Laboratory Modelisation et Simulation Multi Echelle, MSME (UMR 8208 CNRS), 5 bd Descartes – Bat. Lavoisier, 77454, Marne-la-Vallee Cedex 2, France;1. University of Toulouse, Laboratoire de Génie Chimique, UMR 5503, CNRS/INPT/UPS, 31432 Toulouse, France;2. CEA, LITEN, LETH, 17 rue des Martyrs, 38054 Grenoble, France;1. Graduate School of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan;2. PHA Consulting Co. Ltd, 3462-1, Nakatsu, Aikawa-machi, Aiko-gun, Kanagawa 240-0303, Japan;3. Institute of Advanced Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan;1. Department of Fire Protection Engineering, China People''s Police University, Langfang, Hebei, 065000, PR China;2. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, PR China;3. Process Safety and Disaster Prevention Laboratory, Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, 123, University Rd., Sec. 3, Douliou, Yunlin, Taiwan, 64002, Taiwan;4. Division 2.1 ‘‘Explosion Protection Gases and Dusts’’, Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, D-12205, Berlin, Germany;1. Università degli Studi dell’Insubria, Dip. di Scienza e Alta Tecnologia, Via G.B. Vico, 46, 20100, Varese, Italy;2. Politecnico di Milano, Dip. di Chimica, Materiali e Ingegneria Chimica “G. Natta”, Piazza Leonardo da Vinci, 32, 20133, Milano, Italy
Abstract:Thermal runaway was studied in a continuous tubular pilot reactor under steady-state regime. Different accident scenarii were conducted by making some errors on reactant concentrations and/or temperature feed. To prevent thermal runaway, control by direct contact by solvent injection was used at different reactor locations. This injection allowed controlling the maximum reaction temperature. A simplified analytical method to estimate the maximum reaction temperature along the reactor was used.Benefit of this control method was the diminution of computational time. Furthermore, by injecting solvent to control maximum reaction temperature, there is no need to shut down the unit. The control method was validated experimentally.
Keywords:Fast exothermic reaction  Thermal runaway  Continuous reactor  Maximum temperature  Control  Process safety
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