Issues related to continuous distillation
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I have a question: in continuous distillation, when the feed and discharge are stopped in one column, the liquid level in the collection tank of that column rises rapidly, while the liquid level at the bottom of the column drops quickly. What is the reason for this? Thank you
Also, I’d like to ask how this should be handled
No, increasing the reflux rate caused it to drop gradually. What could be the reason for this?
The high temperature at the bottom of the tower is caused by extensive vaporization
The temperature at the bottom of the tower remains unchanged; as the liquid phase evaporates, the liquid level at the bottom of the tower drops. The gas and liquid phases move between the different trays, which increases the reflux pressure back to the bottom of the tower
The reflux is too low; all the material in the reactor bottom evaporates and accumulates in the reflux tank. The balance isn’t properly controlled. Increase the reflux, and ensure that the liquid level in the reflux tank – or at least the liquid level in the reactor bottom – remains more or less constant