Some minor issues with the vacuum level in the vacuum tower
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The vacuum level in the vacuum distillation tower fluctuates significantly and shows a downward trend. The temperature at the bottom of the tower increases, while the liquid level in the reflux tank at the top of the tower decreases. The liquid level at the bottom of the tower rises, and the amount of product taken from the bottom of the tower increases. Experts, please help analyze what could be the reasons for this.
The vacuum level in the vacuum distillation tower fluctuates significantly and shows a downward trend; the temperature at the bottom of the tower increases, the liquid level in the reboiler at the top of the tower decreases, while the liquid level at the bottom of the tower rises. The amount of product taken from the bottom of the tower also increases. In my opinion, assuming there are no leaks inside the tower or issues with the instruments, the problem is likely due to unstable properties of the crude oil or stratification of the crude oil. It depends on the curve analysis.
Bro, this is the hydrogenation and such sector