什么是爆炸极限?
发布日期:2016-11-21 14:51:43
作用:时刻控制好可燃物的浓度,不要让其达到“爆炸极限”。一旦发生爆炸千万不要围观。
作用:时刻控制好可燃物的浓度,不要让其达到“爆炸极限”。一旦发生爆炸千万不要围观。

  2015年在我国台湾地区新北市游乐园发生的粉尘爆炸事故造成多人死伤,让人恐慌。游乐园之所以变成炼狱,是因为人们在活动中喷撒的玉米粉与空气混合后形成了一定浓度比例,此时遇到了火花马上发生爆炸。

  “爆炸极限”表示的正是“可导致爆炸的浓度范围”。可燃物质与空气必须在爆炸极限内均匀混合,遇着火源才会发生爆炸;在低于爆炸下限时不爆炸也不着火;在高于爆炸上限时不会爆炸,但能燃烧。

  不同物质爆炸极限并不一样。事发也非常突然,粉尘类的爆炸更容易让人忽视,比如铝粉、锌粉等。各种塑料粉末、小麦粉、奶粉、煤尘、植物纤维等生产加工场所很容易发生粉尘爆炸,因此要时刻控制好这些场所的可燃物浓度,保障安全生产。爆炸扑救需要时刻注意可燃物的爆炸极限,因为万一扑救时操作不当,可能产生多次爆炸造成更大的伤亡。遇到此类爆炸,切记千万不要围观!

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