Liu Tianqi, Liu Kenan
School of Safety Engineering, Shenyang Aerospace University, Shenyang, 110136, Liaoning, China.
Sci Rep. 2024 Mar 27;14(1):7324. doi: 10.1038/s41598-024-58017-7.
To discuss the inhibitory effect of micrometer scale coal dust explosion pressure, three types of explosion suppressants are selected for mixed explosion suppression. The results indicate that the coal dust explosion process includes three stages: accelerated and decelerated energy release, as well as energy dissipation. When using explosive suppressants, KCO has the greatest inhibitory effect on coal dust explosion, followed by KCl, and CaCO has the smallest effect. The KO, KO, and KOH generated by the thermal decomposition of KCO can also block the heat transfer of coal dust, playing a good role in suppressing explosions. The explosion suppression effect of mixing CaCO and KCO is better than that of mixing CaCO and KCl, and is worse than the explosion suppression effect of using KCO alone. The synergistic effect of KCl and KCO mixed explosion suppression makes the suppression effect better than using KCO alone. This is because KCl generates KO during pyrolysis, promoting the dynamic equilibrium of KCO explosion suppression process. This makes mixed explosion suppression more worthy of attention and adoption when considering purchase costs.
为探讨微米级煤尘爆炸压力的抑制效果，选用三种类型的抑爆剂进行混合抑爆。结果表明，煤尘爆炸过程包括三个阶段：能量加速释放、减速释放以及能量耗散。使用抑爆剂时，KCO对煤尘爆炸的抑制效果最佳，其次是KCl，CaCO的效果最小。KCO热分解产生的KO、KO和KOH也能阻断煤尘的热传递，在抑爆方面发挥良好作用。CaCO与KCO混合的抑爆效果优于CaCO与KCl混合的效果，但比单独使用KCO的抑爆效果差。KCl与KCO混合抑爆的协同作用使抑爆效果优于单独使用KCO。这是因为KCl在热解过程中生成KO，促进了KCO抑爆过程的动态平衡。在考虑采购成本时，这种混合抑爆更值得关注和采用。
