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Taking apart this machine piece by piece

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As qst says, your fumes are not being scrubbed.

You have 2 air paths out of the fume hood - the big MF tubes on top, going straight to the fan, and the small system for direct extraction from beakers that goes to the scrubber.

The scrubber is losing the battle.

To test this, hang one of your extraction tubes in mid air, fire up the system, and light a match about 6 inches underneath the extraction tube and blow it out. Where does the smoke go? Up the extraction tube, or does it divert and go straight up to the big tubes at the top of the fume hood?

Your system looks overly complicated.

A quick way to fix it might be to put a valve in the big tubing coming out of the fume hood. Start closing the valve off until the match smoke goes into the extraction tube instead of bypassing it. Then see if you still ahve fume problems.

One last question - is there air flowing through the scrubber, and if so is it going from top to bottom, or bottom to top?
 
The flat surfaces on top of your tank are for making plumbing connections.

Here is another way to get the job done. This way would require (4) 6" 90 degree elbows. The bottom of the pipe in the tank should be under the media but above the fluid.
 

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Hi Folks
Thanks for your help

In the big pipes there were major leaks and I sealed them with silicon I spent the whole day on that.
There is already a big difference
I don't get the smell of lye thanks to qst42know for bringing this to my attention.
The main smoke from the manifold go into the scrubber and the left over fumes don't get scrubbed.


Hi Drewbie
I have a damper like the 4metals model and it is right above the fume hood
One last question - is there air flowing through the scrubber, and if so is it going from top to bottom, or bottom to top?
The air goes to the bottom of the scrubber and it comes out from the top and goes outside
I think it is working but I have not done any large quantity refining

The flat surfaces on top of your tank are for making plumbing connections.
That hole there opens with a screw type of a cap and I need that for maintenance of the sprinkler


Here is another way to get the job done. This way would require (4) 6" 90 degree elbows. The bottom of the pipe in the tank should be under the media but above the fluid.
I dont know how I can incorporate this idea to my present design
Do I remove those top 2 tubes and replace them with your idea in the picture

I also have the idea of adding 2 bathroom fans like Mikes

Thanks again
 
The gases from these reactions should be treated just like any other deadly gases.
If you have a leak in your welding set than there is a chance for an explosion and in this case there is no explosion but the deadly effects is still there
This can be in the form of long term illness or even sudden effects.
We have to listen to our bodies for signals
I have heard of people doing cyanide bombing in jewelery and while they do this their noses bleed.
This may sound strange but the immediate signals can be seen in your nose
 
I used the system for small amounts of refining and I think it is working very well.
I have worked in manufacturing at different places and I think this work atmosphere is one the cleanest place so far.
There is a touch of the smell of lye but I think with that green container from wal mart I cant expect much more
There is no smell of acid which is important.
qst42know said that I should not even have that slight smell of lye
I don't know if that is realistic
I did a quick research about lye and I think it is not as bad as people think it is.
 
If you're smelling fumes, things aren't working properly.

Then you have to worry about the dangerous odourless gasses.
 
Gold die

You sure are stubborn. If you keep it up you may need that stubborn streak to stubbornly suck oxygen from a bottle.

Have you even read one of these?

Pay close attention to the sentences that include the word "severe", and "death".

http://www.jtbaker.com/msds/englishhtml/s4034.htm
 
I think I am going to take apart this system and re do everything from scratch.
I will post a drawing and I hope this time I will get it right, and if anyone has any suggestions before I begin construction you can give your idea now.
Thanks
 
It is important that we do not try to take advantage of those who join this forum.
He said there is no smell of fumes and gas, and when nitric or hcl smells we can sense it very easily.
The smell is from lye.
I looked at the Italian machine and the compartment where the lye is stored is sealed.
Also I noticed that the model 4metals designed has the lye container completely open.
http://goldrefiningforum.com/phpBB3/viewtopic.php?f=40&t=4776
Maybe 4metals will say it is just so you can visualize the idea but I don't see it that way.
 
golddie is there any reason the scrubber can't be placed outside.

I also believe the fan is not (CFM) sufficient .
 
golddie mentioned he already has asthma. Because of this preexisting condition I expect he needs to be extra cautious. No design flaws or lapses in craftsmanship.
 
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