Multifeed distillation column design

**functionlake** · 09-29-2010, 08:02 PM

Hi everybody,
I'm studying to design a distillation column but with multifeed (3 feeds: 1 feed on top such as external reflux flow) and no condenser. In my references, only design a column with one feed and a condenser. Therefore, I don't know how to determine the minimum number of stages, the minimum reflux ratio and feed-point location of 3 feeds.
Pls give me some calculation method or references to solve this problem.
Thank a lot...

**mobek** · 09-30-2010, 02:44 AM

Where are you from?

Try to google this "Multiple feed distillation column design" and you'll see the results.

**Guillermo Culebro Nieves** · 10-01-2010, 06:30 AM

You must to use fenske equation the top and feed1 then the feed1 is the top and the bottom is the feed2 and then the feed2 is the top and the bottom is the feed3 the top is the feed3 is the top and the bottom you must to sum the number of stages they are the minimun stages

**functionlake** · 10-02-2010, 06:03 PM

Originally Posted by mobek

Where are you from?

Try to google this "Multiple feed distillation column design" and you'll see the results.

Oh, my mistake... Thank you. I follow you. I try to find that words. And I see an article and seem suitable with this problem. It's here "Approximate design of multiple-feed/side-stream distillation systems". Anyone can share it for me?

**functionlake** · 10-02-2010, 06:14 PM

Originally Posted by Guillermo Culebro Nieves

You must to use fenske equation the top and feed1 then the feed1 is the top and the bottom is the feed2 and then the feed2 is the top and the bottom is the feed3 the top is the feed3 is the top and the bottom you must to sum the number of stages they are the minimun stages

Thank you. I'm trying your way.