A 20L spherical explosion testing system was used to characterize the explosion characteristics of brown coal powder and its mixing with different explosion suppressants. and the free radical reaction mechanism was studied through numerical simulation. Research has shown that sodium bicarbonate (NaHCO3) has a low decomposition temperature and a fast reaction rate in the early stages. A significant amount of phosphorous groups are produced when ammonium dihydrogen phosphate (NH4H2PO4) and melamine polyphosphate (MPP) react, consumes explosive free radicals and blocks heat transmission between coal dust, delaying and inhibiting explosion. In the explosive reaction, H and O free radicals are continually consumed during the breakdown of cyanuric acid melamine (MCA). Finally, the suppression mechanism of different explosion suppressants on coal powder explosions was revealed, and specific recommendations were made for the selection and application of explosive suppressants.

中文翻译：

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不同类型固体抑爆剂抑制褐煤爆炸特性的实验与数值研究


采用20L球形爆炸试验系统表征了褐煤粉及其与不同抑爆剂混合的爆炸特性。并通过数值模拟研究了自由基反应机理。研究表明，碳酸氢钠（NaHCO3）分解温度低，早期反应速率快。磷酸二氢铵（NH4H2PO4）与三聚氰胺聚磷酸盐（MPP）反应时产生大量磷基团，消耗爆炸性自由基并阻断煤尘之间的热传递，起到延缓和抑制爆炸的作用。在爆炸反应中，氰尿酸三聚氰胺（MCA）分解过程中，H和O自由基不断被消耗。最后揭示了不同抑爆剂对煤粉爆炸的抑制机理，并对抑爆剂的选择和使用提出了具体建议。