×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Design - Quench tower

Design - Quench tower

Design - Quench tower

(OP)
How do you size a gas quench tower.  We have to design a quench to cool down hot air (420 F) to 140 F.  This would be done using water injection.  What diameter for the quench? length?  Rule of thumb for residence time?...

RE: Design - Quench tower

Look for Donald R. Woods book titled  Process Design and Engineering Practice published by Prentice Hall. You may find it has all the information you are looking for. Good luck.

RE: Design - Quench tower

It is not a simple design.
First you must decide what tower internals you are going to use... ex. packings, trays, etc.  For quench tower, generally packings are used.  

Here are my suggestions...

1) For brief simulation, use a series of flash drums to see how many equivalent stages are required to meet the target temperature.  

2) Then deicde which packings to use based on vapor and liquid flowrates at each stage.  You should make sure your packings will not flood.  At this stage, you can adjust/optimize a tower diameter.

3) Calculate required height of heat transfer section, from which you can derive how high the packings must be stacked.


You will also have to provide a quench water drum, where the residence time plays an important role.  You can do few rough settling/floating velocity calculations based on your expected oil/solid particle size, water flowrate, and drum dimension.  Once again, designing these is very complicated and commonly done by a specialist, unless the existing tower is simply being debottlenecked.  It is not an exaggerating statement to say that you can spend a life researching/designing quench tower only.
 

RE: Design - Quench tower

The quickest and simplest way to quench is with an air-atomized spray nozzle.  See www.turbosonic.com

Peter Brekelmans

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!


Resources