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Preparation and performance of novel APP/NaY–Fe suppressant for coal dust explosion
Journal of Loss Prevention in the Process Industries ( IF 3.5 ) Pub Date : 2020-12-25 , DOI: 10.1016/j.jlp.2020.104374
Qingxi Wei , Yansong Zhang , Kun Chen , Bo Liu , Xiangbao Meng , Xinyan Zhang , Haiyan Chen , Jinshe Chen

Coal dust explosion occurs easily in the coal chemical industry. To ensure safety in industrial production, NaY zeolite was used as carrier modified with Fe ions and combined with ammonium polyphosphate (APP) to prepare a novel composite suppressant for coal dust explosion. The explosion suppression performance of novel APP/NaY–Fe suppressant was investigated by flame propagation inhibition experiments. The results show that Fe ion modification can effectively improve the explosion suppression performance. By increasing content, the explosion suppression performance of the explosion suppressant increases. The maximum explosion pressure Pmax of coal dust drops to 0.13 MPa when 50 wt% explosion suppressants were added, and the coal dust explosion cannot continue to expand. Complete suppression of explosion could be achieved by adding 66 wt% explosion suppressants. Combined with XRD, SEM and TG results, the explosion suppression mechanism was proposed. The novel explosion suppressant has high thermal stability, good dispersity and its explosion suppression components distribute uniformly. It shows good explosion suppression performance by the synergistic effect among explosion-suppression components.



中文翻译:

新型APP / NaY-Fe煤尘爆炸抑制剂的制备及性能

煤化学工业中很容易发生煤尘爆炸。为了确保工业生产的安全性,将NaY沸石用作载铁离子改性的载体,并与聚磷酸铵(APP)结合制备了新型的煤尘爆炸复合抑制剂。通过火焰传播抑制实验研究了新型APP / NaY-Fe抑制剂的爆炸性能。结果表明,Fe离子改性可有效提高爆炸抑制性能。通过增加含量,防爆剂的防爆性能提高。最大爆炸压力P max当添加50重量%的爆炸抑制剂时,煤尘爆炸降至0.13MPa,并且煤尘爆炸不能继续扩大。通过添加66 wt%的抑爆剂,可以完全抑制爆炸。结合XRD,SEM和TG结果,提出了爆炸抑制机理。该新型防爆剂具有较高的热稳定性,良好的分散性,其防爆成分分布均匀。通过防爆成分之间的协同作用,显示出良好的防爆性能。

更新日期:2020-12-25
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