The issue of high oxygen content in the nitrogen gas entering the tower
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What are the reasons for the high oxygen content in the nitrogen gas coming from the tower? How do I make the adjustments? Could the masters give a detailed explanation? Thank you!
At the very least, you should mention your current operating conditions~~ Is all the expanded air currently being fed into the tower?~~
Our values also remain consistently above the design specifications; the temperature in the middle section of the tower has to reach -186.5 degrees before we can barely get the level below 2%. Whenever we switch the molecular sieves, everything has to be restarted from scratch. That’s why it’s difficult to operate the argon system. When we switch the molecular sieves, there is a discrepancy of 15,000 units in air flow between the two units, and we haven’t been able to identify the cause yet. I would appreciate it if experts could help analyze this issue as well. Thank you! ）
More nitrogen can be added, or the reflux ratio can be adjusted, depending on the specific situation
What is the total volume of air? Have you checked the bed layer and air leaks? Is it running at low load?
For the process of feeding expanded air into the upper tower, it is necessary to consider the amount of bypass air, as this has a significant impact on purity; the nitrogen and oxygen content in the gas drawn out from the upper tower is actually not high