Regarding the issue of extraction tray efficiency in aromatic extraction simulation
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While performing a simulation of aromatic extraction, it was found that the efficiency of the extraction tower has a significant impact on the process. When the efficiency was set to 1, the sulfolane solvent moved to the top of the tower; by setting it to 0.9, convergence was achieved, and the results were not very different from those in reality. If the efficiency is reduced further, it will not converge. Previously, when the backwash liquid supply was interrupted, the efficiency was reduced, and as a result the oil extracted from the top of the tower also decreased. Some sources state that the efficiency of the extraction tower using sulfolane as a solvent is only around 20%. Has anyone done a similar simulation? How should the efficiency of this extraction tower be determined? Thank you
By changing the number of trays and the tray efficiency, you can address the issue of having an efficiency of 1 with a reduced number of trays; it’s equivalent to that. Or, at the current number of trays, you can simply multiply by a coefficient manually, and that will do
Thank you for your answer. My current question is: there are a large number of trays and multiple feed streams, so I want to change the tray efficiency; however, if I reduce it below 0.8, the process does not converge. Moreover, according to some sources, the efficiency of extraction towers is very low, below 40%. Changing it to 40% results in completely incorrect values. Could it be a problem with the parameters?
It’s very likely that the convergence threshold has been reached. Hehe, adjust the parameters