化工企业因高温、高压及设备易腐蚀、泄漏等原因,每年都要对化工生产设备进行维护和检修。特别是年度大检修,还须更换一些大型设备。此时,需要停车、设备拆卸、解体或置换一些设备和管线等。根据过去的资料证实,拆卸设备时,易被残留物料(如酸碱)灼伤,或吸入有毒气体引起急性中毒;检修后刚刚开始生产,设备运转不正常 Chemical companies due to high temperature, high pressure and equipment corrosive, leaks and other reasons, every year on the chemical production equipment maintenance and overhaul. In particular, major overhaul, but also need to replace some large equipment. At this point, the need for parking, equipment disassembly, disintegration or replacement of some equipment and pipelines. According to the past data, when disassembling the equipment, it is easy to be burnt by residual materials (such as acid and alkali) or acute poisoning by inhalation of poisonous gas; production has just started after the maintenance and the equipment is not working normally