What causes unstable liquid level in the liquefied gas washing tank?
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Previously, the liquid level in the liquefied gas washing tank of my unit was quite stable, but one day it became extremely unstable – the liquid level dropped rapidly from 60% to 20%. It was necessary to add water several times during each shift, and there was also a serious issue of water being carried along with the liquefied gas as it left the unit； Sometimes, when the liquid level is raised to 85, it slowly rises to over 90 and then stops dropping. Have any experts encountered this kind of problem?
It sounds like symptoms of a broken foam net or damaged internals in the coalescer
Have you checked the level gauge? If the level gauge gets stuck causing water to enter the liquefied gas, check the primary and secondary meters on site; if possible, calibrate the level gauge.
1. First, check whether the pressure setting of the water washing tank is appropriate? 2. On the surface, it seems that there are significant fluctuations in the liquid level; could these be operational fluctuations caused by pressure variations? 3. It is recommended to increase the water inflow gradually, from a low level to a higher one, in order to find an appropriate amount – this will prevent the formation of a liquid seal and ensure balance between the vapor and liquid phases 4. The liquid level has been raised to 85%, and the fluctuations in the liquid level have decreased. This is not because the vapor-liquid phase has reached an equilibrium point, but rather because the pressure inside the tower has increased relatively!
The level gauges have all been checked and are fine!
To be honest, I don’t even know anything about the internal components!
1. Stable amount of liquefied gas entering and exiting the alkali washing process； 2. If the volume remains stable, then there is a problem with the foam breaker mesh ； 3. Also, check to confirm that the glass plate and the remote level gauge are accurate ； 4. First, stabilize the water supply volume; it is also possible to pause the water circulation for a short time to identify the cause ； Replenishing water and circulating it.
Are there any fluctuations in operation? If this happens, it’s likely that there are fluctuations in the operation or that there is a problem with the equipment