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2019-05-31View Original

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Reply #22019-06-01
Translate the following following following following段转化炉(一段转化炉炉段段转化炉 into Japanese.
Reply #32019-06-01
蒸汽吹扫是为了置换掉NG,防止在高温下析碳。 闷炉是为了防止在熄火的状态下温度掉下饱和温度而导致泡水,所以需要在重新点燃部分烧嘴后通入蒸汽吹扫,实际是就是恢复到蒸汽降温阶段。 析碳反应:CH4=C+2H2. 2CO2=C+CO2, CO+H2=C+2H2O. 有数据表明直接用蒸汽吹扫的装置一段炉出口温度掉了130~150℃,并没有掉下蒸汽的饱和温度,所以这个时候是没有泡水之虞的,但是没有二段炉,没有二段炉床层在蒸汽吹扫后的温度数据。而且最终要泄压后通入氮气去置换蒸汽,把水吹干。重新开车后的一段炉的数据我没有。 有直接闷炉的装置,在重新点燃烧嘴后,通入蒸汽,维持500~550的温度吹扫十分钟后泄压至氮气压力以下后,通入氮气置换,再逐步降温。重新开车后系统阻力没有变化,催化剂活性也没有变化, 这两种方法都是基于标题上同样的两个原则,但工艺路线有区别,一个是预转化+一段炉。一个是一段炉+二段炉。 如果是预转化+一段炉+二段炉的工艺路线,在蒸汽直接吹扫后,二段炉催化剂有泡水的可能吗? 蒸汽压力4.4MPA,温度345℃。操作时一段炉3.1MPA,出口740℃。

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