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2012年12月24日,平安夜。当晚19点15分左右,52岁的大化集团合成氨厂甲醇洗工序操作员张永胜接完班后,像往常一样拿着手电、对讲机,领着徒弟小吕去装置现场巡检。当他们走到D0506甲醇罐附近时,耳边传来了时断时续的“吱吱、吱——吱……”声。这种液体冲刷管道的声音,在化工厂里再正常不过了,但老张却停住了脚步。“师傅,这儿不正常吗?”小吕回走几步,来到师傅跟前,摸着脑袋疑惑地问道。
December 24, 2012, Christmas Eve. At about 19:15 that night, 52-year-old Dahua Group ammonia plant methanol washing process operator Zhang Yongsheng then finished classes, as usual, holding a flashlight, walkie-talkie, leading apprentice Lu Xiao to site inspection. When they reached the D0506 near the methanol tank, a “squeak, squeak-creak” sound was heard on the ear. The sound of this liquid scouring the pipe, but then normal in the chemical plant, but Zhang has stopped. “Master, is not it normal here?” Xiao Lu walked a few steps back, came to the teacher in front of his head and asked puzzled.