6' Fume Hood

[goldsilverpro]

It's a fume hood. A scrubber is another thing all together.

 

[kuma]

Evening all!
I hope all is well!

So Haucl4...please tell what is over kill.

Overkill: Hunting rabbits with a nuclear weapon. Killing flies with a shotgun. Metaphor for "expensive and ineffective" at the same time.

I have no educated take on this , as you all know I am a noob and know not a lot , but my personal opinion is Noxx' fumehood and extraction system is awsome , someone had to do it , and I for one am envious , nice work there chief , 8)
With the kindest regards and upmost respect for all ,
Chris :mrgreen:

( P.S. , people should smile more , ... http://tinyurl.com/6rpoom4 8) )

(fixed link :mrgreen: )

 

[Geo]

for an amateur that only processes a small amount at a time i would have to agree, but neither you nor i know what amounts he may be dealing with, and if your speaking about chemical pollutants in the atmosphere, it looks to me like Noxx has followed the guidelines very well.as a challenge to Haucl4, please post some pictures of your fume hood so that we may compare the design and functionality of the two so the members can make a better assumption as to whether or not you have a valid argument.

 

[glondor]

That is a very good idea Geo. I will post pics of a few changes to mine as well. For that matter let's see everyones and we can compare notes!

 

[HAuCl4]

.as a challenge to Haucl4...

Challenge declined. You win. Go and collect your prize.

 

[Smack]

Well then, I'll not post a pic of my 6' BMC fume hood, don't want to ruffle haha. I think you all lit into HAuCl4 a bit too much. He only made an observation and gave his opinion, he initiated no argument, other people did. I understand why you all are so quick to defend Noxx but that's just politicking, besides Noxx is a big boy, if it bothers him, let him speak for himself. Free will still rules, so spent as much or as little as you want on whatever. One of my sayings "If it's worth doing, it's worth doing right" but I don't think I would have spent that much on the blower either, but that's just me. I would still like to have one though.

 

[Noxx]

HAuCl4,

I understand that it might be overkill for backyard PM refiners however, I have an Inc. company and I need to follow environmental laws if I don't want to have fines.

I plan to add a scrubber to the system, however it is still on the drawing board.

There will also be a second hood attached to the blower, and both need to be able to run simultaneously.

Finally, I plan to hire someone this summer or autumn so Personal Safety is a must here.

P.S. No offense taken 8)

 

[goldsilverpro]

You done good, Noxx.

 

[HAuCl4]

Sounds good Noxx. Best of luck with the business and environmental agencies. I suspected you couldn't be running that setup and process big enough quantities without a scrubber...

Cheers.

 

[HAuCl4]

If you keep that fume hood to make pancakes and boil coffee, and your refining acid fumes in the scrubber system, you have a good chance of passing the environmental inspection. (joke).

Now all others can proceed to attack me again... :lol:

Have a nice Sunday. 8)

 

[Noxx]

Today I start building the furnace fume hood (made of Stainless Steel).

 

[4metals]

Noxx,

Have you ever totaled your supplies, (glass, epoxy, lumber, lighting etc.) for this hood and your time to build it? I'm trying to get a comparison between having one made by a fabricator and a DIY hood.

 

[Noxx]

Yes, here's a rough estimate:

-Wood: $200
-Misc parts: $100 (acrylic, screws, pulleys, steel, etc)
-Epoxy paint: $100 (still a lot left)
-Tempered glass: $200

Total: $600

That's for the hood only.

I'm not sure about the time though since it's still unfinished. If I had to build a second one, it'd go much faster.

Next time I might try to build one in steel instead...

 

[butcher]

Noxx, check around, I got a nice chemical fume hood asbestos’s lined for free, the hospital just wanted rid of it, complete with some stainless ductwork and chemical resistant base (Bakelite ?), who knows you may find a school remodeling.

Another option is look for old flammable liquid storage cabinets, the old ones were lined with asbestos’s sheets, and you could make a fume hood from it with some modifications.

Maybe also check for salvage company’s who resale industrial supply’s.

https://www.google.com/#hl=en&q=used+chemical+fume+hood+for+sale&oq=used+chemical+fume+hood+for+sale&aq=f&aqi=&aql=&gs_sm=s&gs_upl=9247l15011l0l16932l14l14l0l0l0l0l203l2046l1.12.1l14l0&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=56e9d7616fefd86b&biw=1152&bih=660

When it comes to running a bussiness and following the clean air acts or other regulations there is no such thing as overkill.


http://www.ebay.com/itm/Nuaire-NU-435-600-Class-II-Biological-Safety-Cabinet-/310372025142?pt=LH_DefaultDomain_0&hash=item48439d4336

http://www.ebay.com/itm/Wet-Chemical-Fume-Air-Scrubber-Harrington-5-10K-CFM-/280366906782?pt=LH_DefaultDomain_0&hash=item41472b7d9e

Maybe find one of these for free.

http://www.ebay.com/itm/30-Gallon-Metal-Flammable-Storage-Cabinet-/230380148246?pt=LH_DefaultDomain_0&hash=item35a3ba1616

 

[Noxx]

Thanks for the links Butcher 8)

One a side note, I decided to add an heat shield to this dry wall since the propane furnace is gonna be close to it. This Al sheet costs only $60 I think.

I also bought a CO/Propane gas detector that you can barely see on the bottom right. It displays the PPM concentration and works well so far.

 

[butcher]

I am not sure what type of heat shield your adding to your wall, but spacing it off away from the wall, (air space between heat shield and the wall), will help keep wall cooler, few inches (air gap),is all needed.

 

[HigginsMechanical]

Thanks for the links Butcher 8)

One a side note, I decided to add an heat shield to this dry wall since the propane furnace is gonna be close to it. This Al sheet costs only $60 I think.

I also bought a CO/Propane gas detector that you can barely see on the bottom right. It displays the PPM concentration and works well so far.

Looking good, Noxx....

 

[HAuCl4]

Hi again Noxx. Another stupid idea of mine is to always have the furnace in the center of the shop, away from all walls and with plenty of room all around it. 8)

 

[watcher6880]

Looks great Noxx... I think that if any one is running a legitimate incorporated refining business they should take your design into consideration as a model design. It may be "Expensive overkill" but it sure beats the hell out of spending thousands on a state of the art commercially produced fume hude.

 

[chemist_12]

Hi Noxx,

Some thoughts on your fume hood:

I don't like that it opens from the side, rather than from the top. I would recommend checking the airflow with some type of smoke, to see how far you can afford to have it open when it is in operation. I can tell you from considerable experience working in a fume hood that it is going to be a lot quicker to do things in it if you can just lift the entire hood sash a bit... for which you need cables and counterweights for the whole sash. If you try to make it a side opener only you are going to need multiple tracks and multiple panes of glass to slide back and forth, and this will be inconvenient at best.

I am potentially concerned about the use of epoxy in an environment where there will be nitric acid. I am not sure which epoxy is in use here, but if it has aromatic rings, they could potentially be slowly nitrated over time as you use the hood for refining and you just might end up with a fume hood that is explosive. Try to look up what type of epoxy you have.

Make sure that your building is capable of handling the air influx that air efflux from the hood will require. Consider what this will do to your heating costs. If you have a furnace in there maybe this won't be an issue...

For a scrubber... What you want is a high surface area, so something with an internal shape like a rigid coffee filter would be good. Sodium carbonate should be adequate to take care of the acid fumes, and ground sulfur should capture any heavy metal vapors (aka metallic mercury). I would try to make something that fits right up inside the pipe(s), so you can change it out regularly with minimal hassle.