×
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 of Amine Contactor

Design of Amine Contactor

Design of Amine Contactor

(OP)
Hi, I am designing amine contactor for H2S removal using MDEA. I am using packed tower with IMTP packing of 1.57inch diameter and the bed diameter is of 3ft. I want to calculate the column height, I need information regarding the retention time of the liqulid in the column. Can anyone help me? Thank you.

RE: Design of Amine Contactor

chemical13:

Your posting is not very clear. Do you mean that you are trying to calculate the packed bed height by knowing the liquid retention time? If so, that is not the way to calculate the bed height. First, you need to calculate (a) the number of theoretical plates needed to get your desired H2S removal. Then you need to (b) obtain the HETP (Height Equivalent to a Theoretical Plate) from your packing vendor or elsewhere. Then multiply (a) times (b).

Or do you simply want to know the liquid retention time for the liquid in the bottom of the column beneath the packed bed?

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

 

RE: Design of Amine Contactor

(OP)
I just wanted to know the liquid retention time for the liquid in the bottom of the column beneath the packed bed.

RE: Design of Amine Contactor

Chemical13:

My rule-of-thumb is to use 5 minutes of retention time between the normal liquid level and the bottom of the vessel. Also, be sure to provide enough space above the normal liquid level for a high level alarm. And be sure to provide a liquid level controller on the bottoms outlet line.

Others may probably have different rules-of thumb.

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

 

RE: Design of Amine Contactor

I am trying to remove Bicine from an Amine unit. Any ideas how to do it?
Iam looking into ion exchange units. Any one with experience as to the type and conditions for best results.

Thanks

dcorllc

RE: Design of Amine Contactor

dcorlic,

Its a very generic answer, but I suggest you start out by Googling solvent reclaiming.  There are a number of companies using different technologies like ion exchange, electrodialysis, and vacuum distillation.

Sometimes normal losses and makeup to a system are sufficient to keep concentrations of contaminants low.  If you are experiencing a buildup of undesirable stuff in your amine, the companies that provide these solvent reclamation services should be able to provide a solution.  It might not hurt to check with your amine supplyer to see what they recommend too.

Good luck,

Jason

RE: Design of Amine Contactor

I try and get 5 minutes of retention time in the contactor bottoms - this will help the level controller not react so frantically.  I'm a big proponent of residence time in amine systems, especially in the lean side prior to the charge pumps.

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