×
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

Turboexpander for expansion condensate gas
2

Turboexpander for expansion condensate gas

Turboexpander for expansion condensate gas

(OP)
Hi

After the first mechanical separation I want to use turboexpanders for expansion natural gas in LTS (Low Temp. Separation). This is condensate gas (even C35+ are present). During expansion higher HC will condensate inside turboexpander. Can HC droplets cause damage? If it's no problem I want to ask for any information/links about manufacturers (turboexpanders).

RE: Turboexpander for expansion condensate gas


Using turboexpander assembly for gas dew-pointing is well established practice. Sometimes it is the only feasible solution - for example, when gas pressure is above cricondenbar, mechanical refrigeration cannot be applied.

Two-phase fluid in turboexpander outlet is not a matter for concern: actually it is requirement in all cases when you need to knock out heavier hydrocarbons from sales gas stream.

Best regards,


 

http://antwrp.gsfc.nasa.gov/apod/astropix.html

RE: Turboexpander for expansion condensate gas

The rule of thumb is no more than 15% by mass liquids in the expander outlet and no more than 5.5 ratios in pressure drop..  The expander doesn't care about what the molecule size is, but it will care if that big molecule turns to a solid!

If you want more than 15%, just expect to replace the rotating elements more often.

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