组合抑爆对管网内甲烷爆炸实验研究及抑爆机理分析

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (10) : 10-20.

冲击与爆炸

组合抑爆对管网内甲烷爆炸实验研究及抑爆机理分析

贾进章1,2，张先如*1,2,3，吴汶芮3

作者信息 +

Experimental study and mechanism analysis of combined explosion suppression for the methane explosion in a pipe network

JIA Jinzhang1,2，ZHANG Xianru*1,2,3，WU Wenrui3

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文章历史 +

摘要

在矿井作业以及天然气运输作业中，甲烷爆炸后产生的冲击波与火焰波所带来的危害较大，为减少爆炸对生命安全和财产安全的损害，该研究在自行搭建的管网系统中利用泡沫铁镍可填充性，将泡沫铁镍与粉体进行组合，通过管网内抑爆试验研究得到泡沫铁镍与粉体最佳组合，利用粉体热解特性与Materials Studio分析NH4H2PO4微观抑制甲烷爆炸机理。试验结果表明：30ppi孔径的泡沫铁镍与70 gNH4H2PO4粉体可以有效地抑制管网内甲烷爆炸，可使管网内甲烷爆炸压力峰值降幅最大可达82.5%；使得各支路火焰传播速度分别降至10.01 m/s、10.99 m/s、11.78 m/s、9.78 m/s；可使各支路温度峰值分别降至359 K、341 K、324 K、337 K。二者组合抑制甲烷爆炸的机理主要物理抑制体现在两者吸热反应中，化学抑制体现在NH3•、NH2•、NH•等受热发分解出大量活性基团捕获甲烷爆炸中的关键自由基，降低甲烷爆炸过程所需自由基浓度。

Abstract

In mine operations and natural gas transportation operations, the shock wave and flame wave caused by methane explosion bring great harm.In order to reduce the damage caused by explosion to the life and property safety, the fillability of Fe-nickel foam and powder combination was utilized in a self-built pipe network system.The optimal combination of foamed iron-nickel and powder was obtained through the explosion suppression experiment in the pipe network.The mechanism of NH4H2PO4 microsuppression of methane explosion was analyzed by using the pyrolytic characteristics of powder and by Materials Studio analysis.The experimental results show that the combination of 30-ppi foamy Fe-Ni and 70 gNH4H2PO4 powder can effectively inhibit the methane explosion in the pipe network, and the peak methane explosion pressure can decrease by up to 82.5%.The flame propagation speed of each branch is reduced to 10.01 m/s, 10.99 m/s, 11.78 m/s and 9.78 m/s respectively.The peak temperature of each branch can be reduced to 359 K, 341 K, 324 K, and 337 K respectively.The mechanism of this combination to inhibit methane explosion is mainly reflected in the endothermic reaction of the two, and the chemical inhibition is reflected in the decomposition of a large number of active groups such as NH3•, NH2• and NH• when heated to capture the key free radicals in the methane explosion, reducing the concentration of free radicals required for the methane explosion process.

导出引用

贾进章1, 2, 张先如1, 2, 3, 吴汶芮3. 组合抑爆对管网内甲烷爆炸实验研究及抑爆机理分析[J]. 振动与冲击, 2025, 44(10): 10-20

JIA Jinzhang1, 2, ZHANG Xianru1, 2, 3, WU Wenrui3. Experimental study and mechanism analysis of combined explosion suppression for the methane explosion in a pipe network[J]. Journal of Vibration and Shock, 2025, 44(10): 10-20

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