Tower parameter settings without a reboiler and condenser?
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For columns without a reboiler and a condenser, why is it always indicated during the setup/stream configuration that the feed (or pumparound stream) to the top stage must be specified when Condenser=None or Condenser Duty=0 (on the setup configuration sheet)? How should it be set in order to complete the configuration?
Based on my understanding of the English terms, it means feeding a stream at the first tray of the tower; in this way the tower is set up properly. However, in the sulfuric acid simulation example included with the ASPEN software’s GUI/app, two absorption towers and one drying tower can be designed without the need for condensers or reboilers, as long as the feed is applied not at the first tray. But when I try to conduct simulations myself, it doesn’t work. I would appreciate some guidance from those who are more experienced.
Is yours an absorption tower? If not, wouldn’t there be no liquid phase on the trays above where the feed is introduced? How to separate it?
There are absorption towers and drying towers. In my opinion, under normal circumstances, the gas is fed into the last tray while the absorbent is fed into the first tray. But what should be done in cases where this is not the case? The example of the built-in sulfuric acid is not like that.
After examining that sulfuric acid example carefully, in the absence of a reboiler and a condenser, the feed is supplied to the last tray of the column; this determines the number of block/pumprounds, specifies the amount of liquid to be drawn from the last tray to the first tray, and defines the temperature of that liquid.
Without a reboiler and a condenser, both the first plate and the last plate must have a feed stream; as you can see, what is pumped up by the pumpgrounds also counts as a feed stream, similar to reflux. If not, there is actually no separation effect above or below the feed point; physically, it cannot exist.
What was said upstairs is right; I didn’t look carefully enough at first: lol