1 reply to this topic

[jimjones]

Hi All,

I have been asked to extend a pipe line from one of our scrubbers to a packing point in the plant, this may require a greater strength fan and i was wandering whether a local extraction point with no scrubber would be more cost effective.

I am dealing with 70% strength Nitric acid and in order to see whether this option is safe i need to know how to calculate the evaporation rate of the acid and compare to those allowed by the HSE. Do you know how I can determine this value?

Thanks for your time

[astro]

Found this paper on the net that looks like it could be just what you're looking for:
Fermilab Paper
Vapor generation and mist evaporation during Buffered Chemical Polish (BCP) operations at the Material Development Testing Laboratory (MDTL)
D. Baird, C. Boffo*, C. Cooper, R. Ruthe
January 17, 2007


All the best with this.

My initial thoughts are that you want to be very sure of your design given the toxicity of 70% HNO3. With material like this, erring on the side of safety is going to keep everybody happy.