烟花爆竹火灾事故的特点
1、易燃易爆物质多。烟花爆竹工厂所用的原料,一类是纸张、木炭,遇火源会迅速燃烧;另一类是药剂,都是易燃易爆物质,主要有黑火药、氧化剂、易燃固体、溶剂等。黑火药是硝酸钾、木炭和硫黄的粉状混合物,遇明火、撞击、高温会引起燃烧、爆炸,在一定条件下,黑火药敞露在大气中会快速燃烧,在密闭状态下会爆炸,爆发点为 270~
2、易发生事故的工序多。烟花爆竹生产流程长、绝大多数带有药物的工序,容易发生爆炸事故。如配药工序、装药工序、中转库搬运、筛药工序、切引工序等都可能发生爆炸燃烧事故。
3、先爆炸后燃烧。烟花爆竹工厂事故,一般是先发生爆炸,再由爆炸引起燃烧,除爆炸点可燃物燃烧外,由于花炮有升高、飞跃、跳动、旋转等特点,会引起一定距离之外的可燃物燃烧,形成大面积火灾。
4、燃烧引起爆炸。烟花爆竹工厂的纸张、建筑物起火,引起火药、花炮成品、半成品爆炸。散落在地面上的火药,堆放在工作台上的火药,先发生燃烧,然后引起火药库、花炮成品爆炸。
5、燃烧、爆炸交替进行。先爆炸、后燃烧的情况大多发生在生产工序,由燃烧引起新的更大的爆炸。而先燃烧、后爆炸大多发生在药库、原料库、成品库,这种爆炸的破坏力更大,往往又会引起大面积的燃烧。
6、燃烧速度快。烟花爆竹工厂的爆炸是在瞬间发生的,爆炸产生的火种到处飞散。由于厂房内到处是纸张和易燃易爆物品,爆炸后在短时间内就能引起大面积燃烧,一般在数分钟内火势就发展到猛烈阶段。
7、容易造成人员伤亡。烟花爆竹工厂各生产工序发生燃烧、爆炸,在场人员往往来不及逃出而被烧伤、炸伤,甚至烧死。若药库、成品库发生爆炸,其威力更大,会危及灭火人员和附近人员的安全。
8、 燃烧产物有毒性。烟花爆竹燃烧、爆炸的产物 CO、CO2、H2S、NO等都有一定的毒性,赤磷等燃烧时产生有毒烟雾,危害人身安全,妨碍灭火行动。
- 上一篇:烟花爆竹火灾事故的原因
- 下一篇:烟花爆竹火灾事故扑救措施

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