Basic definition-"Reflux is a technique invloving the condensation of vapours and the return of this condensate to the systems from where it is orginated." so the heavys will be removed.
I have a stabilizer column where the fresh condensate (60 Deg C) from well is fed in to the 19th tray. Whereas, the stabilized condensate from expander (28 Deg C) section is fed in to the 15th tray. As we know the temperature profile will decrease from bottom to top of the stabilizer column.why they have to pass 60Deg feed in 19th tray and 28Deg feed in 15th tray?
i found an answer that " fresh condensate from well have higher absorption capacity towards C4+ components in stabilized condensate and so fresh feed act as a reflux"
how they are saying fresh condensate have higher absorption capacity?
and what absorption capacity does in reflux?
Hi
this link can help you
http://encyclopedia.che.engin.umich.edu/Pages/SeparationsChemical/DistillationColumns/DistillationCol
Thank you for replying .I'm unable to view that link . Help me with it.
This link to similar information works better:
http://inside.mines.edu/~jjechura/Refining/03_Crude_Units.pdf
Basically there are contaminants in the overhead product that are soluble in heavier material used as "reflux" the contaminants dissolve in the reflux to create a purer overhead product. I hope this simplified explanation and attachment help.
Santosh, For the purpose of this discussion a "contaminant" is any compounds that you do not want in the product. For this particular separation it appears that you are attempting to make a cut between C3 and C4s. Any C4+ in the overhead would be considered a "contaminant" .
Usually it is desirable to make the cut between C2 and C3. In your configuration there is probably a naphtha "sponge oil" that contacts the overhead containing C3 and preferential removes C3 from the mixture to be recovered at another flash drum or column in the plant.
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