×
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

Tank Blanket Gas Requirement

Tank Blanket Gas Requirement

Tank Blanket Gas Requirement

(OP)
Hi all,

I am trying to estimate the flue gas requirement for a proposed plant. I have been able to determine all FG needed for all processes except tank blanketing purposes.

People have directed me to API 2000, but it doesn't give you the blanket gas needed. API 2000 is used to calculate vent sizes and flowrate.

Can anyone explain how I can estimate the daily blanket gas requirement for tanks? Currently, I am estimating the daily withdrawal from the tanks and using that volume as the requirement. For example, if 10 pounds of slop was pumped out a day, the blanket gas required will be 10 pounds converted into cubic ft. Same thing for amine and glycol (using amine and glycol make-up values from promax simulations). However, I am coming up with a small value - 60 cubic feet a day.

Is my approach right? Does the figure look reasonable for a 60 mmscfd plant? Make-up of amine is 1.12 lb/hr, glycol is 2.85 lb/hr, water is 144.53 lb/hr and slop is 0.55 lb/hr. Using their densities, I converted into cubic feet/day. Density for slop is 62.06 lb/cubic ft.

Thank you all for your help.

RE: Tank Blanket Gas Requirement

Figure out your pumpout rates and how the product could be moved out of the tanks - that's your blanket rate. Then, size the system generously so you never run out of blanket gas - ever.

RE: Tank Blanket Gas Requirement

Using API2000 for calculation of required blanket gas is too conservative. The respective API committee clearly prevented the designers from using API 2000 for that purpose( I have the document but it is not handy now). API2000 is standard to size "safety" devices.
Hope this help

RE: Tank Blanket Gas Requirement

Hi Berenger
Sorry I can't answer you detail of this blanket gas requirement but you may refer to follow forum post , and
there is very useful excel spreadsheet for your reference.

http://www.cheresources.com/invision/topic/573-siz...

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!


Resources