May I ask how to handle the decrease in argon content in the second tower for crude argon?
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Should it be placed outside the tower, or should the load on the refined argon tower be increased so that it can handle it? As for the two crude argon towers, what should be done – increase their load or reduce it?
First of all, judging trends is not an issue related to instrumentation and control. Another possibility is a “nitrogen plug”.
After nitrogen plugging, a small amount can be introduced into the refined argon column, as long as it does not cause nitrogen plugging in that column~~ The only option left is to vent it~~
How much is the reduction? What percentage. In mild cases, send more material to the rectifier to increase its load
From personal experience, if the purity of argon at the outlet of the crude argon tower is not good, the amount of argon sent to the refined argon tower is reduced to prevent too much nitrogen from being introduced. Enhance the circulation in the crude argon column ‖ Column 2 to improve the quality of argon sent to the refined argon column.
First, check the argon content in the crude argon stream; if there is a sharp drop, it is recommended to vent more than 80% of it. If the decline is gradual, then, while maintaining the flow rate of crude argon, most of it should be directed into the refined argon tower, where liquid will accumulate before it is sent to the second crude argon tower~~