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1 问 题某化工厂在制氢设备检修前做动火分析 ,当安全科长用一台可燃气体检测报警仪测定低温制氢设备内氢气含量时 ,仪器显示值 4 % (实际上 ,几次测定均在 3 0 %～ 3 8%H2 之间 )。此时 ,安全科长批准可以动火。当焊工班长对焊枪点火的刹那间 ,发生了猛烈爆炸 ,现场低温制
1 Problem Some chemical plants make dynamic fire analysis before the hydrogen equipment is overhauled. When the safety chief uses a combustible gas detection alarm to measure the hydrogen content in the hydrogen production equipment at low temperature, the instrument displays a value of 4% (in fact, several measurements All between 30% ~ 38% H2). At this point, the security chief can approve the fire. When the welder squad ignition on the torch, a violent explosion occurred, the site cryogenic system