动火通常是指在禁火区进行焊接与切割作业，以及在易燃易爆场所使用喷灯、电钻、砂轮等可能产生火焰、火花和赤热表面的临时性作业。在化工企业中，设备的安装维修、技改更换，往往离不开动火作业。有的企业经常一边生产，一边动火，稍有不慎，很容易发生火灾爆炸事故，给职工 Fire usually refers to welding and cutting operations in the fire zone, as well as temporary operations that may cause flaming, sparks and red hot surfaces using torches, electric drills and grinding wheels in flammable and explosive places. In chemical companies, equipment installation and maintenance, technical change, often can not do without firework. Some enterprises often produce while moving fire, a little careless, it is prone to fire and explosion accidents, to workers