wet scrubbers

[mechanicaldup]

where can I find design guides and selection manuals on wet scrubbers?

 

[elguero]

What are you trying to remove? NOx, SOx, particles?

 

[mechanicaldup]

Elguero

I want to remove the HNO3 and NOx

thks

 

[EdClymer]

Mechanicaldup

Scrubbing depends upon solubilty of gas in the media.

NOx (five or seven gasses) can not be scrubbed - it requires a form of 'black magic'.

What are the concentrations? and what are you hoping to reduce to? NOx is still coloured even at low concentrations.

Regards

Ed


Ed Clymer
Resinfab & Associates
England

 

[elguero]

HNO3 (that is, nitric acid) can be removed by scrubbing with a high pH water solution.

Many NOx compounds can be decomposed via catalytic converter. Some NOx can be converted to HNO3. Elevating the pressure, via a compressor, can boost solubility in water – this makes neutralization in high pH water easier.

More specifics are needed.

 

[bonzoboy]

Try these guys....they are very knowledgeable

http://www.wapc.com/home.htm

 

[kenvlach]

In some cases, the NOx can be eliminated at the source. If formed from the HNO₃, as when used for stripping plating, add a bit of H₂O₂ to the nitric stripping solution. The H₂O₂ catalyzes the reaction of NOx back to HNO₃ before it ever leaves the solution. This conserves HNO₃ as well as eliminates the NOx.

Only 0.1-0.2 vol% H₂O₂ (49 wt%) is required for heavy stripping; e.g., when using 50 vol% nitric on electroless nickel plated out on an SS HXer. Works well at ambient temperature; at some higher temperature the H₂O₂ will decompose too rapidly to be practical.

Of course, this tip is for end-users, not equipment manufacturers. If the latter, you could perhaps earn some customer good-will with this tip. It's not generally known; I've met EN platers with 15 & 20 years experience who were really grateful to get rid of the red-orange fumes.