http://www.esafety.cn/blog/wll/66030/index.html

安全生产事故案例分析习题(48)

作者[孙锡云] 发表于[2011-8-5 15:50:00]

2011年安全生产事故案例分析习题(48)

  某化学试剂厂生产车间进行反应釜装甲苯作业。作业过程中发生强烈爆炸,继而猛烈燃烧近2h.现场作业的7人中5人当场死亡,2人严重烧伤。

  生产车间南北长约30m,东西宽约8m,西面开门,具有抗爆型结构。

  该厂装甲苯的操作方法是先将甲苯灌装在金属桶内,再将金属桶运到反应釜近旁,经塑料软管将甲苯从金属桶注入反应釜内。如附图所示,端部固定在金属桶小盖上的软管1是长约8m的塑料管,自反应釜上方开孔引入反应釜;端部固定在金属桶小盖上的软管2是橡胶管,连接车间外30m远处的气泵。启动气泵,甲苯即顺软管1注入反应釜。

  现场情况:未逃出的5人已烧焦、收缩,反应釜倒在地上,金属桶下盖脱落,墙上和天花板上出现裂纹,窗玻璃全部破碎。

  经分析,确认是静电火花引起的爆炸。经计算,塑料软管内甲苯的流速超过静电安全流速的3倍。甲苯带着高密度静电注入反应釜,如釜内残留有螺母、垫圈、焊条头等孤立导体,很容易产生足以引燃甲苯蒸气的静电火花。

  单项选择题

  l.工艺过程中所产生静电的电压可能高达(  )以上。

  A.数万伏  B.数千伏  C.数百伏  D.数十伏

  答案:A

  2.管道内液体流动产生的静电大约与流速的(  )次方成正比。

  A.1  B.2  C.3  D.4

  答案:B

  3.生产车间的(  )最容易产生和积累危险静电。

  A.金属桶  B.反应釜  C.塑料软管  D.气泵

  答案:C

  • 标签:安全生产 注安试题 
  • 圈子:注安之家 
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    原创

    作者[原创(游客)] 发表于[2016-9-30 16:05:19]
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    作者[原创(游客)] 发表于[2016-9-28 21:22:09]
    原创(游客)http://seogsywj.lofter.com/post/1e634756_c6dddbb http://seogsywj.lofter.com/post/1e634756_c6de95d http://ywjseo.lofter.com/post/1e634752_c6500a6 http://bjseoywj.lofter.com/post/1e66bf3e_c70f57e http://seogsywj.lofter.com/post/1e634756_c6df246 http://ywjseo.lofter.com/post/1e634752_c650f21 http://seogsywj.lofter.com/post/1e634756_c6df5a6 http://ywjseo.lofter.com/post/1e634752_c64ff69 http://ywjseo.lofter.com/post/1e634752_c64f05b http://seogsywj.lofter.com/post/1e634756_c6dec61

    原创

    作者[原创(游客)] 发表于[2016-9-6 21:47:36]
    原创(游客)http://rywwx.lofter.com/post/1e5a844e_c3cdc91 http://rywwx.lofter.com/post/1e5a844e_c3cdc90 http://rywwx.lofter.com/post/1e5a844e_c3cdc8e http://rywwx.lofter.com/post/1e5a844e_c3cdc8d http://rywwx.lofter.com/post/1e5a844e_c3cdc8c http://rywwx.lofter.com/post/1e5a844e_c3cdc8b http://rywwx.lofter.com/post/1e5a844e_c3cdc8a http://rywwx.lofter.com/post/1e5a844e_c3cdc89 http://rywwx.lofter.com/post/1e5a844e_c3cdc88 http://rywwx.lofter.com/post/1e5a844e_c3cdc87
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