Liu Tianqi, Liu Kenan
School of Safety Engineering, Shenyang Aerospace University, Shenyang, 110136, Liaoning, China.
Sci Rep. 2024 Dec 30;14(1):32065. doi: 10.1038/s41598-024-83595-x.
The ignition and explosion risks of industrial metal powder are significantly different from other types of powder, and its explosion suppression deserve attention. In this article, industrial titanium powder explosion is taken as the test object, and its explosion pressure and explosion suppression process are analyzed. The research results show that the mass concentration of powder clouds and ignition delay time have a great impact on the explosion pressure of titanium powder. The optimal concentration of powder cloud mass is 350 g m, under this condition, the rate of energy release per unit time is the highest, the maximum pressure of titanium powder explosion is 0.48 MPa. The optimal ignition delay time is 50 ms, changing the ignition delay time actually changes the state of the powder cloud at the ignition moment. The suppression effect can be ranked, and the best suppression agent is NaHCO, followed by KCO, and finally SiO. Under the effects of isolation, dilution, and cooling, NaHCO has the greatest effect on the explosion pressure of titanium powder.
工业金属粉末的着火和爆炸风险与其他类型的粉末有显著不同，其抑爆值得关注。本文以工业钛粉爆炸为试验对象，分析其爆炸压力和抑爆过程。研究结果表明，粉末云团的质量浓度和点火延迟时间对钛粉的爆炸压力有很大影响。粉末云团质量的最佳浓度为350 g/m³，在此条件下，单位时间的能量释放率最高，钛粉爆炸的最大压力为0.48 MPa。最佳点火延迟时间为50 ms，改变点火延迟时间实际上改变了点火瞬间粉末云团的状态。抑爆效果可以排序，最佳抑爆剂是NaHCO₃，其次是K₂CO₃，最后是SiO₂。在隔离、稀释和冷却的作用下，NaHCO₃对钛粉爆炸压力的影响最大。
