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首页> 外文期刊>Journal of loss prevention in the process industries >Experimental study on the mitigation via an ultra-fine water mist of methane/coal dust mixture explosions in the presence of obstacles
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Experimental study on the mitigation via an ultra-fine water mist of methane/coal dust mixture explosions in the presence of obstacles

机译：有障碍物时通过超细水雾缓解甲烷/煤尘混合物爆炸的实验研究

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摘要

In this paper, experimental investigations were performed for the mitigation via an ultra-fine water mist of methane/coal dust mixture explosions in the presence of obstacles to reveal the effects of the obstacles in this scenario. Two PCB piezo-electronic pressure transducers were used to acquire the pressure history, a Fastcam Ultima APX high-speed video camera was used to visualize both the process of the mixture explosion and its mitigation. The diameters of the coal dust, the types of obstacles and the volumes of ultra-fine water mist were varied in the tests. The parameters of the explosion overpressure and the range of critical volume flux of the ultra-fine water mist for explosion mitigation were determined. The results show that the mixture explosion and its mitigation are primarily influenced by the number, shape and set locations of the obstacles. When the volume flux of the water mist is larger than a certain amount, the mixture explosions and the effects of obstacles can be completely mitigated with the ultra-fine water mist.
机译：在本文中，通过在存在障碍物的情况下通过超细水雾甲烷/煤尘混合物爆炸的缓解措施进行了实验研究，以揭示这种情况下障碍物的影响。两个PCB压电压力传感器用于获取压力历​​史记录，Fastcam Ultima APX高速摄像机用于可视化混合物爆炸过程及其缓解过程。试验中改变了煤尘的直径，障碍物的类型和超细水雾的体积。确定了用于缓解爆炸的超细水雾的爆炸超压参数和临界体积通量范围。结果表明，混合爆炸及其缓解主要受障碍物的数量，形状和设置位置的影响。当水雾的体积通量大于一定量时，混合物会爆炸，超细水雾可以完全减轻障碍物的影响。

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