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为了降低瓦斯燃烧带来的危害性,在搭建0.36m×0.36m×0.70m标准受限空间的基础上,采用超细水雾灭火技术,研究了超细水雾抑制瓦斯燃烧火焰的有效性以及雾化速率、施加位置和添加剂等因素对其抑制效果的影响.结果表明:超细水雾可以有效降低瓦斯燃烧的热释放速率和烟气温度,抑制瓦斯的燃烧火焰.随雾化速率的升高,超细水雾的抑制效果增强,当前实验条件下,超细水雾雾化速率临界值约为400ml/min,此时其能有效地熄灭瓦斯火焰.从受限空间底部施加超细水雾的抑制效果优于从顶部施加.在超细水雾中加入某种具有化学抑制作用的添加剂,能有效地增强超细水雾抑制效果.
In order to reduce the harmfulness caused by gas combustion, based on the 0.36m × 0.36m × 0.70m standard confined space, the effect of superfine water mist to suppress gas combustion flame Atomization rate, application position and additives on the inhibition effect were studied.The results showed that ultra-fine water mist could effectively reduce the heat release rate and flue gas temperature of gas combustion and suppress the combustion flame of gas.With the increase of atomization rate Under the current experimental conditions, the critical value of the atomization velocity of the ultra-fine mist is about 400ml / min, at which point it can effectively extinguish the gas flame. Apply superfine water from the bottom of the confined space Fog suppression is superior to that applied from the top, adding a chemical inhibitor to the ultrafine water mist effectively enhances the ultra-fine mist suppression.