Inhibiting effect of inhibitors on ignition sensitivity of wood dust |
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| Institution: | 1. Fire & Explosion Protection Laboratory, Northeastern University, Shenyang 110819, China;2. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;3. Department of Process Engineering & Applied Science, Dalhousie University, Halifax, NS, Canada;4. Department of Civil Engineering, Shenyang Jianzhu University, Shenyang, 110168, China;5. State Key Laboratory of Strata Intelligent Control and Green Mining Co-founded by Shandong Province and the Ministry of Science and Technology, Qingdao 266590, China;1. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China;2. Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, Nanjing Tech University, Nanjing, 211816, China;1. J. Mike Walker ’66 Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123, USA;2. Mary Kay O’Connor Process Safety Center, Texas A&M University, College Station, TX 77843-3122, USA;3. Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843-3122, USA;1. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China;2. Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, Nanjing Tech University, Nanjing, 211816, China |
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| Abstract: | Wood products are easy to produce dust in the production and processing process, and have a serious explosion risk. In order to improve the safety of wood products production, the inhibiting effects of magnesium hydroxide (MTH), SiO2, melamine polyphosphate (MPP) on the minimum ignition energy (MIE) and minimum ignition temperature (MIT) of wood dust were experimentally studied. The results showed that the inhibiting effects of inhibitors on the MIE of wood dust show the order of MPP > SiO2>MTH. The order of the inhibiting effects on the MIT of wood dust was MPP > MTH > SiO2. When 10% MPP was added to wood dust, the time when the flame appears (Tappear) and the time when the flame reaches the top of the glass tube (Ttop) obviously rose to 80, 140 ms. Therefore, MPP had the best inhibiting effect on the ignition sensitivity of wood dust.According to thermogravimetry (TG), differential scanning calorimetry (DSC) tests, the introduction of MPP leaded to lower maximum mass loss rate (MMLR), higher temperature corresponding to mass loss of 90% (T0.1), residual mass and heat absorption. In addition, thermogravimetric analysis/infrared spectrometry (TG-IR) results showed that MPP produced H2O (g) and NH3 (g) during the thermal decomposition process, which diluted the oxygen. |
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| Keywords: | Minimum ignition energy Minimum ignition temperature Ignition sensitivity Inhibiting effect Wood dust |
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