What is the control scheme for a liquefied gas desulfurization tower?
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How many interfaces can be formed inside a tower? How can the flow rate of the enriched amine liquid in the tower bottom be controlled through a certain interface? O(∩_∩)O Thank you
There is only one interface at the bottom of the tower; instead of controlling the flow rate of the rich amine liquid at that location, it is the outlet control valve for the rich amine liquid that directly regulates the level at the bottom of the tower.
How many more interfaces will be formed in other parts of the tower?
Inside the liquefied gas desulfurization tower, there is an interface between the amine solution and the liquefied gas. However, when abnormal conditions involve oil, the position of the interface will not be accurate; but such extreme cases are generally not taken into consideration in design.
Isn’t there an interface between the lean amine solution and liquefied gas at the top of the tower, and an interface between the rich amine solution and liquefied gas at the bottom? We’ve installed three level gauges on the tower as we can see now, but I still don’t fully understand it. .
Do you recover the amine solution when you stop production? The lower indicator can be used when stopping the operation to drain the amine solution, allowing for maximum recovery of the amine solution and preventing liquid hydrocarbons from entering it ；
How do you handle stopping work? Look at the level gauge below to close the valve, drain away the amine solution, and leave LPG inside the tower?
It doesn’t matter whether you look at that interface or not; generally, it’s sufficient to keep an appropriate level of rich amine liquid at the bottom of the tower as well as the level of liquefied gas. Do not allow the pressure in the liquefied gas section to drop to zero before sending it to the solvent regeneration unit