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Increasing Vacuum on EtOH & H2O column

Increasing Vacuum on EtOH & H2O column

Increasing Vacuum on EtOH & H2O column

(OP)
Thanks in advance.
I read this post but have a much simpler process than described.
http://www.eng-tips.com/viewthread.cfm?qid=237048&page=13

My question is, if I have extra vacuum pumping capacity already installed.  Can I reduce the amount of steam in the stripping section by drawing more vacuum on the rectifying column.

My initial thought was this could help by reducing the temperature needed for the same separation, but the increased vapor flow along with larger condensate duty is a concern.

we currently have a vacuum pressure of about 280 mmHg and i don't know how low we are capable of going, but say for ex. 175 mmhg(2psia)... what would be the affects

No i don't have simulation software, sure would be nice though
 

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