煤粉对泡沫金属抑制爆炸火焰波性能的影响规律

发布时间：2018-04-11 22:33

  本文选题：煤粉 + 泡沫金属　； 参考：《煤炭学报》2017年11期

【摘要】：泡沫金属是能够同时抑制瓦斯爆炸冲击波和火焰波传播的新型阻隔爆材料,但在煤粉环境下泡沫金属阻隔瓦斯爆炸的能力却不得而知。为研究煤粉对泡沫金属阻隔瓦斯爆炸火焰波传播的影响规律,在自行设计的直径120 mm的瓦斯传爆测定装置中,对管道中添加不同参数煤粉后泡沫金属衰减火焰速度的性能进行了实验研究。结果表明:添加粒径为60~80目的 5,10,50,100 g煤粉后,爆炸火焰波衰减率分别为92.95%,97.93%,80.95%,92.05%。对于特定参数的泡沫金属,煤粉质量在一定范围内会造成阻隔性能的降低。分析发现煤粉粒径越接近泡沫金属孔径,煤粉越易滞留于阻隔材料,泡沫金属的阻隔效果也越差。100 g 40~60目的煤粉添加后导致泡沫金属的火焰波衰减率降低为68.23%。研究结果显示,管道中的煤粉质量和粒径均可对泡沫金属的阻隔性能产生重要影响。
[Abstract]:Foam metal is a new type of flame barrier material which can suppress both blast wave and flame wave propagation of gas explosion, but the ability of foam metal to prevent gas explosion in pulverized coal environment is unknown.In order to study the influence of pulverized coal on flame wave propagation of foam metal barrier gas explosion, a self-designed measuring device for gas transmission and explosion with a diameter of 120 mm was developed.The properties of flame attenuation rate of foam metal after adding different parameters of pulverized coal in pipeline were studied experimentally.The results show that the attenuation rate of explosion flame wave is 92.95% 97.933% and 80.95% and 92.05% respectively after the addition of 50 100 g pulverized coal with a particle size of 60 ~ 80 objectives.For foamed metal with specific parameters, the mass of pulverized coal in a certain range will result in the decrease of barrier performance.It is found that the closer the particle size of pulverized coal is to the pore diameter of foam metal, the easier it is to stay in the barrier material, and the worse the barrier effect of foamed metal is, the worse the flame wave attenuation rate of foamed metal is reduced to 68.23 after the addition of 100 g of pulverized coal.The results show that the quality and particle size of pulverized coal in the pipeline have an important effect on the barrier performance of foam metal.
【作者单位】： 黑龙江科技大学安全工程学院;中国矿业大学安全工程学院;黑龙江科技大学理学院;
【基金】：国家自然科学基金青年基金资助项目(51604101) 黑龙江省自然科学青年基金资助项目(QC2015054) 国家安全监督管理总局2016重大事故防治关键技术科技资助项目(heilongjiang-0001-2016AQ)
【分类号】：TD712.7
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本文编号：1737948