Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Incrasing Tower Top Reflux

Incrasing Tower Top Reflux

Incrasing Tower Top Reflux

Top Reflux of a distillation tower incasing about 10% , which(s) parameter may casecs to this incrasing?

RE: Incrasing Tower Top Reflux

There could be numerous reasons depending on how your tower is controlled.  Depending on your situation some could be:

*  Increased reboiler Q
*  Trying to control a tight spec on both the top and bottom product.  No decoupling in an advanced control scheme.
*  Targetting an impossible bottoms spec, i.e., too low a vapour pressure on the bottoms product.
*  Lower pressure (lowering separation efficiency)
*  Inaccurate overhead product analyser or predictor
*  Inaccurate bottoms analyser or predictor
*  Controls reacting improperly because tower is entering a flooded state.

the list goes on and on...



Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - Considerations for choosing a 3D printing technology
The adoption of 3D printing into major companies’ product development life cycles is a testament to the technology’s incredible benefits to consumers, designers, engineers and manufacturers. While traditional production methods have limitations in manufacturability, 3D printing provides unparalleled design freedom due to the additive method of building parts layer by layer. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close