什么是烟囱效应?
发布日期:2016-11-21 14:51:04
作用:日常做好管井防火工作,保持楼道防火门常闭,避免出现“烟囱效应”。逃生中遇到被烟封锁的楼道千万不要进去。

作用:日常做好管井防火工作,保持楼道防火门常闭,避免出现“烟囱效应”。逃生中遇到被烟封锁的楼道千万不要进去。

  在火场逃亡过程中,如果你看到楼道内充斥着浓烟,千万不要进去,那是因为楼道内很可能形成了“烟囱效应”,已经不再安全。
  在消防术语里,“烟囱效应”是指着火后底楼燃烧产生的有毒气体和热空气,经过建筑内部的电梯井、管道井或楼道这些“烟囱”迅速向上蔓延。上海市消防局曾经做过一个实验:一座高度为100米的建筑(约30层),在无阻挡的情况下,烟气顺竖向井管扩散到顶层只需要30秒,瞬间整栋建筑形成“立体火场”,不但扑救困难,楼内人员也难以自救逃生。
  建筑物越高,“烟囱效应”越明显。因此高层建筑内的楼梯间、电梯井等直通最高层的竖向井道在建造时一定要做好防火处理,还要注意不要让常闭式防火门长期敞开,否则这些地方在发生火灾时会成为火势迅速蔓延的“烟囱”。人员逃生时也要注意逃生的楼梯间是否已经成为“烟囱”,盲目进入火场可能吸入过量烟气中毒身亡。

  关键词:消防水炮|大空间水炮

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