Newbie seeking help: how to create mid-section recirculation in a tower?
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As the title suggests, how to establish mid-stage reflux when constructing a vacuum distillation column? What is the difference between fixed rate draw pseudoproducts and total phase draw? How should one make a choice in atmospheric and vacuum distillation? What is the difference between total tray flow and net tray flow, and how should one choose? I also hope that if anyone here has a simulation of the atmospheric and vacuum distillation unit, they could share it; as I don’t have the access needed to view simulations for this process. I hope experts can answer, thank you!
To establish mid-stage reflux, it is recommended to use the PUMPAROUNDS function within the tower. After clicking to enter, you can select the intermediate tray extraction position and the return tray position. Specify the extraction amount or heat taken, and then specify the tower return temperature or the temperature difference for heat extraction at intermediate stages. A mid-section reflux can be established. Fixed rate draw refers to the flow rate of the stream drawn off via a side line, while pseudoproducts are virtual streams. Total tray flow is the total amount of liquid or gas flowing over a tray, including the flow rates of the side stream and the intermediate stream drawn from that tray. Net tray flow is the net flow rate at a tray; for liquids, it represents the amount of liquid flowing from an upper tray to a lower tray, excluding the amount of liquid drawn from the upper tray and the amount of liquid returning from the intermediate stream.
Thank you, floor 2; I’ve learned a lot from this!