What causes the pressure in the butylene degasification column to rise slowly?
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If the operating parameters remain unchanged, the pressure will gradually increase on its own. What’s going on?
Is the increase significant? Is there any change in the temperature difference of the tower top condenser? If the temperature difference decreases, there may be no non-condensable gas at the tower top again.
If the previous degassing system has not released any non-condensable gas, it is very likely what was mentioned above.
We don’t have a degassing tower. . .
No stripping tower? What is the Ganwei device? A certain pressure corresponds to a certain temperature. You say that other parameters remain unchanged – what exactly does this term “other parameters” include? Has the tower top temperature changed? Has the pressure difference changed? What is the pressure control method at the top of the tower? If it’s a bottleneck, then the opening degree of the bottleneck valve should change. Or is it a recirculating condenser with direct pressure control? So there must be a change in the temperature difference before and after the condenser. If neither of those is the case, then has there been any change in your feed components? By analyzing carefully on one’s own, one will always find differences; by identifying those differences, one can determine the reasons behind them. I really don’t understand it, so I’m telling everyone about the anomalies you’ve found.
The question is too simple and general; it is recommended to refine it so that everyone can analyze the reasons.