Law of variation for low density polyethylene dust explosion with different inert gases |
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| Institution: | 1. School of Safety Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China;2. Beijing Academy of Safety Engineering and Technology, Beijing, 102617, China;3. Department of Foreign Languages, Beijing Institute of Petrochemical Technology, Beijing, 102617, China;1. Japan National Institute of Occupational Safety and Health, 1-4-6 Umezono, Kiyose, Tokyo 204-0024, Japan;2. Konkuk University, 120 Neungdong-ro, Gwangin-gu, Seoul 143-701, Republic of Korea;3. Technology Institution of Industrial Safety, 2-16-26 Hirosedai, Sayama-shi, Saitama 350-1328, Japan;1. Key Laboratory of Gas and Fire Control for Coal Mines of Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China;2. School of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China;1. School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, PR China;2. CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, PR China;3. State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, Anhui, PR China;4. Process Safety and Disaster Prevention Laboratory, National Yunlin University of Science and Technology, Douliu, Yunlin 64002, Taiwan;1. School of Chemical Engineering, Sichuan University, Chengdu, 610065, China;2. Division 2.1 “Explosion Protection Gases and Dusts’’, Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, D-12205, Berlin, Germany;3. Otto von Guericke University, Universitätsplatz 2, D-39106, Magdeburg, Germany;1. School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China;2. Key Laboratory of Building Fire Protection Engineering and Technology of MPS, Tianjin 300381, China |
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| Abstract: | To reveal the effects of different inert gases on explosion characteristics during low density polyethylene (LDPE) dust explosion and optimize the explosion-proof process, eight N2 (CO2)/air mixed inerting conditions were experimentally studied. Typical inerting conditions with 12 L cylindrical explosive tank were used to study the characteristics on the flame propagation. The thermogravimetric analysis with related theories were used to further explain the mechanism and quantities in low density polyethylene (LDPE) dust explosion with different inert gases. The results showed that the reduction of O2 concentration could effectively delay the progress of flame growth process and weaken the effect of dust combustion reaction. The flame growth process of condition (N2/air (18% O2)) was 2.05 times slower than that of the non-inert condition. The explosion strength was obviously reduced, and the characteristic parameters such as explosion pressure and flame propagation speed were also affected by the decrease of O2 concentration. For LDPE powder, the smaller the median diameter, the greater the explosion intensity and the lower the limiting oxygen content (LOC). The LOC with CO2 was usually higher than that with N2 and the effect of CO2 was significantly better than N2 in inerting. |
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| Keywords: | Low density polyethylene Safety Dust explosion Flame propagation Inerting |
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