Ask for help due to fluctuations in methanol recovery tower
Thread Content
As shown in the figure, there is a simple distillation tower for recovering methanol. The top of the tower is methanol and the bottom of the tower is sewage. It was running smoothly before. During the recent fluctuations, the temperature and pressure of the tower kettle dropped, and the pressure at the top of the tower became slightly negative (normally 1KPA). At the same time, the feed volume of the methanol tank increased and the feed volume of the sewage tank decreased. Please ask a master to analyze what is the reason. Is it a change in the feed components or is there a blockage in the pipeline equipment?
It is caused by fluctuations at the top of the tower. It looks like flash evaporation. Does the material at the top of your tower also have high moisture content? First check your control instrument and whether your methanol outlet pipeline has siphonage or other fluctuations in recovery.
Reflow, not recycling, typo
:(Another possibility is that your toluene production liquid level is kept too low, and the production pump acts as a negative pressure pump. .