View Full Version : Sulphuric acid to scrub NH3

01-08-2017, 08:11 PM
We have a fish factory that has asked for NH3 scrubbers for all their ventilation, because they are close to a populated area.

They have had a blowout (faulty service valve that wouldn't close), and it caused a massive evacuation.

I've read about ammonia scrubbers, where there is a water/sulfuric acid mix that is circulated as a mist and when ammonia gas comes in contact with this mix.

All the information I can find is for large industrial process plants, does anyone have any experience with this, or any more information?

Would be much appreciated :)

03-08-2017, 12:03 AM
Long time ago I worked on LPG gas carrier vessel. To protect the crew in case of gas leak, air inlet of supply ventilation had very sensitive sensor which shut off the fan. Additionally we had NH3 scrubber on suction side of air supply fan. Scrubber was black plastic box size 2mx2m2m with recirculation pump and nozzles. I don't remember about any acid added to the water.
It is not clear for me what fish factory want to do. Do they want to put scrubbers on all exhaust fans?

05-08-2017, 10:40 AM
If still around, maybe this company can help.
There are come contact details on the bottom.

I would imagine this incident was looked into & had some safety recommendations.
Sometimes a screw on ball valve can be useful to use in a number of maintenance situations.
I would use one if valve was suspect, I wanted to close very quickly if something went wrong, like transferring liquid ammonia or high pressure ammonia.
With oil draining would definitely use one & in most cases mandatory.
So basically review all procedures, I'm sure you are on to it.


I like these ones, as can screw onto anything threaded.