Large-scale dust explosions in vessel-pipe systems |
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| Institution: | 1. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, Jiangsu, China;2. School of Environmental & Safety Engineering, Changzhou University, Changzhou, 213164, China;3. Center for Process Safety and Industrial Disaster Prevention, School of Engineering, National Yunlin University of Science and Technology, Yunlin, 64002, Taiwan;1. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China;2. Department of Process Engineering & Applied Science, Dalhousie University, Halifax, B3H 4R2, Canada;3. Fire & Explosion Protection Laboratory, Northeastern University, Shenyang, 110819, China;1. School of Safety Science and Engineering, Changzhou University, No. 21, Gehu Mid-Rd., Wujin Dist., Changzhou, 213164, Jiangsu, China;2. Department of Safety, Health, And Environmental Engineering, National Yunlin University of Science and Technology, No. 123, University Rd., Sec. 3, Yunlin, 64002, Taiwan, ROC;1. CSE Center of Safety Excellence (CSE-Institut), Joseph-von-Fraunhofer-Str. 9, 76327, Pfinztal, Germany;2. University of Applied Sciences, Moltkestrasse 30, 76133, Karlsruhe, Germany;1. International Center for Chemical Process Safety, Nanjing Tech University, Nanjing, 211816, China;2. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China;3. School of Environmental & Safety Engineering, Changzhou University, Changzhou, 213164, China;4. Department of Safety, Health, And Environmental Engineering, National Yunlin University of Science and Technology, 123, University Rd., Sec. 3, Douliou, Yunlin, 64002, Taiwan |
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| Abstract: | This study investigates dust explosions in vessel-pipe systems to develop a better understanding of dust flame propagation between interconnected vessels and implications for the proper application of explosion isolation systems. Cornstarch dust explosions were conducted in a large-scale setup consisting of a vented 8-m3 vessel and an attached pipe with a diameter of 0.4 m and a length of 9.8 m. The ignition location and effective dust reactivity were varied between experiments. The experimental results are compared against previous experiments with initially quiescent propane-air mixtures, demonstrating a significantly higher reactivity of the dust explosions due to elevated initial turbulence, leading to higher peak pressures and faster flame propagation. In addition, a physics-based model developed previously to predict gas explosion dynamics in vessel-pipe systems was extended for dust combustion. The model successfully predicts the pressure transients and flame progress recorded in the experiments and captures the effects of ignition location and effective dust reactivity. |
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