×
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

Anhydrous Ammonia Cylinder storage

Anhydrous Ammonia Cylinder storage

Anhydrous Ammonia Cylinder storage

(OP)
Hi all. My plant have a anhyrous ammonia storage tank and we vaporise to gas via a vaporiser. I was wonder if it is possible to replace with cylinder storage instead as our vaporizer (both) are having issues. The flow rate required per hour require is 100kg/h.

RE: Anhydrous Ammonia Cylinder storage

NH3 has a somewhat low vapor pressure at typical ambient temperature.  As such, vapor NH3 stored at ambient temperature will have a low density and a tank just cannot store much quantity.  It is possible, but not practical for the long term.  Can you do it for a short term to get out of a jam with two bad vaporizers?  You'll have to estimate that, because we do not have enough details to figure this out.

Good luck,
Latexman

Technically, the glass is always full - 1/2 air and 1/2 water.

RE: Anhydrous Ammonia Cylinder storage

give us an idea about the size of the current storage tank, ambient conditions year around to which the tank is exposed,whether the 100 kg.hr is continuous or intermittent. Just a thought about installing a second smaller tank receiving the vapor from the larger tank and repipping from this smaller tank.

RE: Anhydrous Ammonia Cylinder storage

what temperature and pressure do you require for your process?

i think of ammonia as having relatively "high" vapor pressure for a given ambient temperature. for instance, ~50 psig at 32°F and ~ 197 psig at 100°F.

if you are in a warm climate (e.g., southern florida), you may not need a vaporizer to deliver ammonia at 55 psig. basically, you will gain enough energy through the pressure vessel wall to keep pressure on the system.

if you are Canada and operating in the winter and need 100 psig, you definately need a "heater or vaporizer."

typically i have seen more of a "heater" design where you keep the pressure in the tank by using a "side-arm" heater/vaporizer where you have liquid flow from the bottom of the tank going to the heat source and a vapor balance line back to the top of the tank. i would not recommend a liquid line feeding a separate vaporizer unit if you could avoid it.

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