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[". Qual é a diferença entre a des置换和吹扫置换?

2019-11-04View Original

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我们的反应器在置换时会采用两种置换方式,一种是一边冲氮气,一边排氮气,还有一种是先把压力冲到2MPa,然后在排放到1MPa,请问这两种方法
Reply #22019-11-05
因为吹扫置换会有很多死区无法有效置换,尤其一些反应器、塔器内件复杂的。所以一般都是先用压力置换方式进行冲压排放作业,如果后路没有要求,尽量将压力排至最低,比如你冲压到2MPa,排放至大气压0.1MPa,你的一次置换可以将反应器内有毒气体浓度稀释20倍,通常两三次就能达到进人条件了,如果只能置换到1MPa,你大概要置换7、8次才可能达到条件。在压力置换合格后,通常还要保持一段时间的吹扫置换以确保这个反应器完全置换合格。吹扫置换的优势就是不用人员一直在现场操作,可以保持长时间置换作业进行。所以两种方式穿插进行以达到最终置换合格目的。
Reply #32019-11-21
第二种是爆破吹扫,肯定效果会更加好些,用于清洁度要求高的地方
Reply #42019-11-21
置换一般是先升到一定压力 然后降至微正压 吹扫一般采用石棉板爆破吹扫
Reply #52019-11-21
最彻底的置换是抽真空后充氮气
Reply #62019-11-22
主要是确保釜内没有空气,空气可能对工艺有影响

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