×
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

If the flow rates are small relative to the tank size, I would think that thermal effects would contribute a lot of the blanket gas turnover?

RE: Tank Blanket Gas Requirement

One of the worst case situations is a nearly empty tank tank in the hot sun that suddenly gets rained-on.

RE: Tank Blanket Gas Requirement

Double posted from Chemical Engineering - red flag one and get it removed.

Steve Jones
Materials & Corrosion Engineer

http://www.linkedin.com/pub/8/83b/b04

All answers are personal opinions only and are in no way connected with any employer.

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