Reboiler and Pumparounds
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When simulating a distillation column, a thermal siphon reboiler can be modeled using either a Reboiler or Pumparounds. For example, in a distillation column with 20 trays, the heat siphon reboiler is designated as a Reboiler; since a heat siphon reboiler in PROII is equivalent to 2 theoretical trays, the flow entering and leaving the Reboiler goes from tray 20 to tray 19, and the hydraulic calculations for the columns can be carried out up to tray 18. If Pumparounds are used for the thermal siphon reboiler, the flow entering and leaving the Pumparounds is from tray 20 to tray 20, and the hydraulic calculations for the trays can be performed up to tray 19. Therefore, under the same other input conditions, the top of tower/top heat load obtained by the two methods is different. So the question is, for simulating the thermal siphon reboiler in a distillation column, should Reboiler or Pumparound be used?
General* conventional Reboiler
The calculation methods for these two are different; when using PUM for calculations, it is necessary to understand the principle behind it as well as the relevant settings. The results obtained through PUM vary depending on the design requirements
Can a thermal siphon reboiler be replaced with Pumparounds?
So far, it has been found that the reboiler consists of 2 trays, while the pump consists of 1 tray. Could you explain in detail the differences between these two methods, as well as the criteria for selection?
Is the flow rate into the reboiler the same as that of the pump? What enters the pump is the circulation volume of the reboiler, but is what enters the reboiler the liquid phase volume from the last tray? I seek advice from those who are more experienced.