Inverted temperature in the distillation pre-column
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Who can explain the reason for the inverted temperature in the distillation pre-column? Is it related to filling it with nitrogen when parking? Are there any other reasons? Please help, everyone.
This issue has been discussed many times in this forum: http://bbs.hcbbs.com/viewthread.php?tid=216000&rpid=946099&ordertype=0&page=1#pid946099 http://bbs.hcbbs.com/thread-50746-1-1.html
Personally, I think it is still necessary to consider the temperature of the reflux liquid when adding extraction water to the reflux tank, as the addition of extraction water is intended to increase the temperature difference between methanol and other light components; the smaller this temperature difference, the higher the content of methanol gas in the vented gas. The higher the temperature of the reflux liquid, the more likely it is that the temperature at the top of the tower will be higher than that at the bottom of the tower