超细水雾抑制瓦斯爆炸的可行性研究

利用超细水雾冷却效率高,吸热效果好的特点,对“瓦斯—空气”混合气体在不同量超细水雾氛围内的爆炸过程进行了初步的实验研究。实验发现在超细水雾氛围内,瓦斯爆炸的火焰传播速率明显降低,起爆阶段的火焰传播加速度也有较大幅度的降低,火焰在实验管道内的传播时间显著延长,并且发生了火焰驻停现象,但爆炸感应期变化不大。这表明超细水雾较高的吸热效率有效地消耗了瓦斯爆炸燃烧生成的一部分热量,削弱了火焰传播的能量。如果在超细水雾中再加入某些能够起到化学抑制作用的添加剂,形成含添加剂的超细水雾,就能更为有效地抑制瓦斯爆炸火焰的传播。

Feasibility Study of Gas Explosion Suppression by Superfine Spray

Preliminary laboratory study was conducted on the explosion process of gas-air mixture in super-fine spray atmosphere with different quantity according to the features of high cooling efficiency and good heat-absorption effect of supper-fine spray. The experiment discovered that the propagation velocity of gas explosion flame was markedly decreased in the super-fine spray atmosphere, the acceleration of flame propagation at the detonation stage was also reduced by a bigger margin the time of flame propagation in duct was obviously prolonged, and flame delay phenomenon occurred, but in the explosion induction period, no great changes took place. This indicated that the higher heat-absorption efficiency of super-fine spray has effectively consumed a portion of energy produced by gas explosion and combustion and weakened the energy of flame propagation. If putting some chemical additive agent into the super-fine spray, it can effectively suppress the propagation of gas explosion flame.