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[byx_92]

Hi all,
I'm currently designing an azeotropic distillation column but I have encountered some problems in my design. In my design, water is introduced into the distillation column as a solvent or entrainer. Now, I have two feed streams in my column in which one is ETBE/ethanol and another one is pure water. I found problem when trying to calculate the optimum feed stage location using Kirkbride equation since I have two feed streams.

My question here is how do I calculate the feed stage locations for the two feed streams?

P/S The composition and conditions for feed streams are known.

[PingPong]

You are dealing with a non-ideal system so I don't think that Kirkbride equation is of any real use. And neither is Fenske Underwood Gilliland in this case.

In fact I don't even use those shortcut methods even for fairly ideal systems.

 

Use a process simulator and determine optimal feed stage locations simply by trial-and-error. Use trial-and-error.also for determining optimal number of total stages.

Edited by PingPong, 18 October 2014 - 07:24 AM.