Contact US

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!

*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

H2S Stripper Control

H2S Stripper Control

H2S Stripper Control

Regarding H2S stripper control in distillate strippers, we have seen similar concerns in our distillate stripper with regard to optimizing Flash Point. We have a fired reboiler heater configuration, and we do not have continuous analyzer measurement for the stripper bottoms product. Upon embarking on an APC application for Flash Pt. optimization, we built an inferential prediction for Flash Pt., but we are finding that this property prediction which is based on stripper bottoms tempertaure may not be sufficiently robust for realtime control, and we run the risk of having occasional "off-test" product if we attempt to control based on inferential prediction. We have Kerosene/Naphtha material in our feed which is rejected as a liquid overhead product. This net overhead liquid product seems to be a good indicator of when bottoms Flash Point might become too low.

So we are finding that the best control we might be able to do is to stabilize the tower with APC, but not necessarily optimize Flash Pt. closely. Since we have Kero/Naphtha is our stripper feed for sufficient control, should we be able to control Flash more tightly?, and if so what are toher key variable we should be looking for in our APC? One variable with have noted might be useful is reflux/(reflux + net overhead liquid), or R/D+R, sometimes refered to as Separation Index.

Thank You.

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. 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