×
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

What is Percent Flood?

What is Percent Flood?

What is Percent Flood?

(OP)
We are being given a design of an amine plant that describes Percent Flood. Can someone please explain what this term means? If it helps at all, the designers say they prefer it to run at 70% flood, but some people will run as high as 80%. This is on an amine contactor with structured packing.

RE: What is Percent Flood?

pipeENGR:

The term "percent of flood" applies to absorption or distillation columns using either packed beds or trays. Such a column operating at "80 percent of flood" means that the column is operating at a ratio of vapor flow-to-liquid flow such that the column is within 20 percent of being "flooded" (i.e., in essence, within 20 percent of being ineffective).

Milton Beychok
(Visit me at www.air-dispersion.com)
.

RE: What is Percent Flood?


Don't forget that amine contactor effectiveness is also affected by a variety of other factors beside hydraulics.

RE: What is Percent Flood?

There are generalized tables for the different types of trays and random packing.  Get you McCabe or Smith books out.  I believe there some packaged programs on the net to get you a rough idea of the diameter required to meet the requirements.

For structured packing you can get a good idea from the generalized calculations, but I'd get a vendor to do his propritory calculations and a performance gaurentee from a vendor if the vessel is smaller than the generalized equations by say 15%.

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