×
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

Local Exhaust Ventilation

Local Exhaust Ventilation

Local Exhaust Ventilation

(OP)
We transfer a ammonia solution from Bulk-Trailer to a 6000 gal bulk-storage tank which is located inside our facility. This solution has 25% ammoniam hydroxide, 25% ammoniam chloride, and the rest is water and some other minor components. The transfer rate is 70 gal/min. What is the proper way to get rid of ammonia vapors coming into the facility?

RE: Local Exhaust Ventilation

Saumian

Consider routing the tank vent to a spray scrubber to clean the air that is displaced by the incoming liquid.  Ammonia vapours are effectively scrubbed with a dilute acid solution (e.g. sulfuric acid).

PeterAB.

RE: Local Exhaust Ventilation

I assume the ammonia leaves your bulk storage tank via the "breather" as displaced air.

A very simple "bubble" chamber attached to the breather (together with a vacuum relief valve) containing dilute sulphuric acid will do the trick.

Be careful of the depth of immersion of the chamber inlet. If the tank is rated to say 4 inch WG, then don't submerge the inlet pipe further than say 3 inches.

Profaic

RE: Local Exhaust Ventilation

Route the displaced vapors back to the bulk truck.

RE: Local Exhaust Ventilation

Great way to do this.
The carrier then does the same at the other end and the result is reduced emmisions and reduced losses.

RE: Local Exhaust Ventilation

bobhearn11 solution is best.  This practice is done at many facilities where fugitive emission is to be controlled during transfer.

RE: Local Exhaust Ventilation

Is your ammonia odor problem caused whilst the disconnecting the transfer hose ?

If this is the case - use ECOSORB Odor Neutralizer (713 910 3773) which neutralizes Ammonia odors on contact, without the use of hazardous chemicals (sulphuric acid, etc.).  It is a safe, cost effective solution which is only used when the spill odor occurs.

Allen Botha

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