I have a question regarding the bottom liquid level in a pressure relief tower
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The liquid level at the bottom of the vacuum tower fluctuates up and down repeatedly. The float also moves up and down. What is the reason?
There must be a leak somewhere, causing an imbalance in pressure
Please share, what are the reasons?
Is it related to the small volume? It’s like boiling at the bottom of a tower – it immediately returns to its original position, fluctuating back and forth
The external flow rate is low, the reflux volume in the middle section is small; the pump at the bottom of the tower is partially evacuated. The level control valve at the bottom of the tower leaks air, or the proportional and integral parameters are not set properly, resulting in fluctuations in vacuum level. The steam temperature used for heating at the bottom of the wet tower is low, and fluctuations in the flow rate of the crude oil system cause uneven heat release from the residue heater, which in turn leads to fluctuations in the residue flow rate and affects the liquid level in the tower. Wait
There are significant fluctuations in the light components at the bottom of the tower, and there is considerable leakage or variation in the steam injected at that location
This phenomenon is really strange; you might not have encountered it before
It’s impossible; I’ve definitely encountered it before. No, show me the operation diagram
Two more days passed, and the float ball got damaged (the technician said it was bent and leaking). It was also found that the double-flange level gauge exhibited fluctuations similar to those of the previous float. It’s just that the upper and lower ranges are smaller
Besides the liquid level at the bottom of the tower, there must be other operating parameters that are fluctuating repeatedly, such as temperature, reflux rate, the opening degree of the distillation valve, the amount of material extracted, and so on. Go and look for them.