Methane has a wide range of applications in several industries. However, it also exhibits flammable and explosive properties, which pose a potential hazard. This study used calcium alginate to make ordinary dry water powder have a stable network gel structure, and urea was added to enhance further dry water powder’s chemical inhibition. A visual test system verified the explosion suppression effect of gel-modified dry water powder on the methane-air explosion. The results show that the optimal parameters for Ordinary dry water preparation were as follows: mass ratio of SiO2 to H2O = 9:100, stirring speed = 5000 r/min, stirring time = 240 s. The powder concentration for the best explosion suppression effect is 0.52 g/L. 10 mass% Urea-modified dry water, which achieves high explosion suppression efficiency in the methane-air explosion system by cooling and endothermic suppressing the explosion reaction. The spatial distribution of Calcium alginate gel urea modified dry water hinders the propagation of the flame. Urea continuously produces nitride at different temperatures, and nitride competes for O2 and OH· Free radicals, thus destroying the methane-air explosion chain reaction. Calcium alginate gel urea (10 mass%) modified dry water of 0.52 g/L has the best explosion suppression efficiency, which reduces the flame propagation velocity of methane-air explosion system by 42.48 %, the suppression efficiency of flame temperature reaches 40 %, and the suppression effect on explosion relief pressure reaches 16 %. Calcium alginate gel urea modified dry water, a new explosion suppression material, significantly improve the explosion suppression effect of methane-air explosions, which can not only improve the industrial safety of methane-containing processes, extend equipment life, and reduce production costs but also help improve environmental protection and resource utilization efficiency by inhibiting methane explosions. This study helps to promote the development of gas explosion suppression materials and has practical significance for safe energy utilization and industrial methane applications.

中文翻译：

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凝胶改性干水中海藻酸钙和尿素的增强抑制甲烷-空气爆炸


甲烷在多个行业中有着广泛的应用。然而，它也表现出易燃和易爆特性，构成潜在危险。本研究使用海藻酸钙使普通干水粉具有稳定的网状凝胶结构，并添加尿素以进一步增强干水粉的化学抑制作用。视觉测试系统验证了凝胶改性干水粉对甲烷-空气爆炸的抑爆效果。结果表明，普通干水制备的最佳参数为：SiO2与H2O的质量比=9：100，搅拌速度=5000 r/min，搅拌时间=240 s。最佳抑爆效果的粉末浓度为 0.52 g/L。10 质量% 尿素改性干水，通过冷却和吸热抑制爆炸反应，在甲烷-空气爆炸系统中实现高抑爆效率。海藻酸钙凝胶尿素改性干水的空间分布阻碍了火焰的传播。尿素在不同温度下不断产生氮化物，氮化物争夺 O2 和 OH·自由基，从而破坏甲烷-空气爆炸的链式反应。海藻酸钙凝胶尿素 （10 mass%） 改性干水 0.52 g/L 的抑爆效率最佳，使甲烷-空气爆炸系统的火焰传播速度降低 42.48 %，火焰温度抑制效率达到 40 %，对泄爆压力的抑制效果达到 16 %。 海藻酸钙凝胶尿素改性干水是一种新型抑爆材料，显著提高了甲烷-空气爆炸的抑爆效果，不仅可以提高含甲烷工艺的工业安全性，延长设备寿命，降低生产成本，还可以通过抑制甲烷爆炸，有助于提高环境保护和资源利用效率。该研究有助于促进气体爆炸抑制材料的发展，对能源安全利用和工业甲烷应用具有现实意义。