Asking chemical engineers for advice
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For a distillation column with a changing feed composition and a high content of light components, the number of trays in the stripping section should be reduced, and the feed should be introduced from the lower part. Is it right or wrong? Please explain it as clearly as possible. I’d appreciate everyone’s guidance
As the composition becomes lighter, raise the feed inlet; the feed composition should be as close as possible to that of the feed tray, so as to achieve stability. Imagine an extreme case: if the light component makes up 99.9%, it can be fed directly to the tower top, haha
Adjust upward; if the change is not significant, do not adjust this feed inlet in the end.
Adjust upward; if the change is not significant, do not adjust this feed inlet in the end.
Keep in mind that the most energy-efficient feeding method for distillation is to have the feed concentration as close as possible to the concentration at the feed plate. Well, you might think that in a tower, of course the light components are at the top and the heavy components are at the bottom. So if the amount of light components in the feed increases, it’s of course most appropriate to adjust the feed level upward!
Thank you all for your advice! I also think this is wrong, but everyone in my department says it’s right. Ah, the few can’t overcome the many
As the light components increase, the load on the stripping section of the distillation column rises; therefore, the feed inlet needs to be moved upward to increase the number of trays in the stripping section； At the same time, increase heat supply to the tower bottom to raise the yield at the tower top.