PAN dust explosion inhibition mechanisms of NaHCO3 and Al(OH)3 |
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| Institution: | 1. College of Resources and Civil Engineering, Northeastern University, Shenyang, 110819, PR China;2. College Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, China;3. Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, NO. 3-11, Wenhua Road, Heping District, Shenyang, Liaoning, 110819, China;4. School of Resources and Environmental Engineering, Jilin Institute of Chemical Technology, No. 45 Chengde Street, Longtan District, Jilin, 132022, China |
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| Abstract: | We investigate the PAN dust explosion inhibition behaviors of NaHCO3 and Al(OH)3 in a 20 L spherical explosion system and a transparent pipe explosion propagation test system. The results show that, in the standard 20 L spherical explosion system, the highest PAN dust explosion concentration is 500 g/m3, the maximum explosion pressure is 0.661 MPa, and the maximum explosion pressure increase rate is 31.64 MPa/s; adding 50% NaHCO3 and 60% Al(OH)3 can totally inhibit PAN dust explosion. In the DN0.15 m transparent pipe explosion propagation test system, for 500 g/m3 PAN dust, the initial explosion flame velocity is 102 m/s, the initial pressure is 0.46 MPa, and the initial temperature is 967 °C; adding 60% NaHCO3 and 70% Al(OH)3 can totally inhibit PAN dust explosion flames. Through FTIR and TG analyses, we obtain the explosion products and pyrolysis patterns of the explosion products of PAN dust, NaHCO3, and Al(OH)3. On this basis, we also summarize the PAN dust explosion inhibition mechanisms of NaHCO3 and Al(OH)3. |
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| Keywords: | PAN dust Explosion inhibition mechanism Inhibitor Flame propagation behavior Chemical inhibition |
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