Nasty stuff indeed! I am familiar with sodium hydrosulfite, similar problem - this substance will combust spontaneously, and when it does the flame generated is self supporting, so the only fire-fighting technique available is isolation to let the fire burn itself out.
I mention this because...
Hi Asesor,
This is a little out of my area of expertise. But interestly enough, as the result of being unemployed for an extended period of time a few years ago, I found a 'temporary' position at a major USA electronics retailer while I looked for an appropriate professional position. I was at...
Hi siretb,
Thanks, I am most familiar with NH3 concentrations as high as several hundred ppm.
Another point that has not been mentioned is the H2SO4 is generally less expensive than muriatic acid. Sulfuric acid is the most produced and used process chemical.
It would be interesting if sheik...
Hi ctairman,
I apologize if I offended you. But I also point out, my statement regarding your comment was a qualified statement, I did not say that you were incorrect. I do therefore stand by my post. Your previous post, as written, more than implies, it indeed predicts, particuate buildup, and...
ctairman's comment here that packed bed scrubbers:
"block up with particulates very quickly quickly"
is not an absolute truth. Older tower packings, such as saddles, do have histories of fouling and plugging, often times within relatively short time frame.
But retrofit to a modern, open...
Hello Group,
From reading TerryB's question, it appears that the process unit is a simple oxidation step - with no heat recovery. If this is true, then high fuel use is expected.
If, as Fizzhead and 25362 imply, there is some type of heat recovery, then more information is needed before...
A well designed and well built RTO will achieve this type of VOC destruction. The RTO is widely used in the EU due to the fact that air pollution regs over there are both demanding and rigidly enforced. I believe that the latest update in the EU moves to 15 mg/m3 allowable out the stack, and...
Thank you again 25362,
The air will be carried via either a 4 ft or 5 ft round duct.
Then the air will pass a plenum - the design problem at hand - before it enters the process unit that is square. I did answer your post above a bit to hastily.
The square unit will be 10 ft by 10 ft - 100...
Thank you 25362.
As you have noted - the face area of the process unit that will be accepting this air flow is ~ 11 ft2.
I need a plenum between the ducting and the inlet that will lower the air velocity to that of the process unit. So my design problem is how do I size this plenum? Can the...
Sorry - I could not resist the alliterative impulse.
I have a project that will be moving 30,000 cfm of air and the process unit requires that the air be slowed to an approximate velocity of 300 fpm. Temperature is ambient.
If the ducting carring the air stream is 4 ft diameter, the velocity...
Eu Vey! HS- ion is held in solution at pH ~ 9.
If pH FALLS - then H2S will reform and will come out of solution. This will start at pH 8 and accelerate as pH falls further.
My apologies for the error in my previous post!
JimE
1st stage - NaOH solubolizes the H2S as HS-.
2nd stage - NaOH / NaOCl - oxidizes the sulfide to sulfate, assuming sufficient chemical is present.
Chemicals are expensive, by pulling the H2S into solution and then oxidizing in a 2nd stage the most complete use of NaOCl is assured. Also, the...
Another possible solution would be to prevent, or at least reduce, oil carry over from the production separator. This may be possilbe with recently developed coalescing media.
