how to build an acid resistant hood & scrubber _hood_

[qst42know]

Don't base your decision on me.

A similar product is used in salt water fish tank wet dry filters called bio-balls.

 

[JOEYL]

Ive read the thread and the other lab building thread.

I understand the concept with the scrubber, curious if anyone or 4metals have some real life photos of a unit and design.
This would help me in designing my own unit and having it properly functional first time around.

Any help with real life photos of a fume hood with fume scrubber? Could help me out alot with my own unit..

 

[golddie]

http://www.jaeger.com/tripack.htm
If these cover more surface area than you can save one the lye being used and also have more metals in the water
Is this right or am i wrong
by the way I have decided to take 300 dollars of these things
I was saying I will have 3 feet of water in the tank but I think it will be less than that

So far I didn't come across any pictures

 

[golddie]

http://www.jaeger.com/tripack.htm
I just picked up these things and I paid 340 dollars and this will be enough for my scrubber
The person made a mistake when he said 1,200 dollars
He said he sells these things to fish farms

 

[golddie]

These amount of the plastic balls I have a 10 CF
I didnt put them in the scrubber yet but the amount looks like its more than enough to fill 3 feet of the scrubber.
But the person selling me this said I need about 3 more than this amount.
He sounds like an honest person
Can anyone explain this to me
Thanks

 

[qst42know]

You should have asked the salesman how they determined you needed more.
They may well have just did a volume calculation of your tank.

The balls that are submerged in solution will do little, and open air above won't do much either.

 

[PreciousMexpert]

The balls that are submerged in solution will do little, and open air above won't do much either.

qst42know
Can explain this a bit I am confused
From the way you say it they should not be in the water and they should not be out of the water than where should they be.

 

[Barren Realms 007]

The nozzels in the top of the colum spray the solution, the solution trickles down over the media and mixes with the fumes or material from you scrubber to neutralize it. There should not be much if any fluid that collects in the bottom of your scruber that should be held in your tank that your pump pulls your solution from.

 

[4metals]

The balls should have a surface film of water on them to work effectively. This is accomplished by pumping the scrubbing liquid through the nozzles over the bed of packing. The water level in the sump should not be so high as to submerge any of the packing. The air water interface is where the reaction happens.

As far as determining how much packing is needed the question being asked should be the CFM going through the scrubber. (which is not necessarily the CFM of the blower, it depends on your ducting) The longer the fumes remain in the working area of the scrubber (the wetted packing) the more effective the scrubber.

 

[golddie]

http://www.germes-online.com/catalog/17/745/page15/144878/siphon_pumps.html

I had been looking hard to find flexible tubes to use inside a fume hood and I couldn't get them
The place where I bought my glass ware said he has but he didn't sell it to me he said hell give it to me next time I go there
When I bought a siphon today I realized that the tubes from these things might be good for what I need
I didn't think about it at the time
Tomorrow I will go there and see if I can buy only the tubes or just buy the pump

 

[qst42know]

What diameter are you looking for. A pool supply store should have 1-1/4", 1-1/2" and 2".

Or you can try here.

http://www.usplastic.com/catalog/default.aspx?catid=567&parentcatid=681

 

[golddie]

So far I have 10 CF of these scrubber balls and to fill the whole thing I would need 3 times more or something like that
and I have sliced up some small water bottles about 5 grocery bags
also I have slice up 3 grocery bags of bottles from antifreeze bottles javex bottles which are heavier
I dont know if you can image the weight of those scrubber balls individually they don't weight much but in all the 10 CF is heavy because these things are made very well and they don't crush under the weight of other things easily.
so i see a problem here if I fill that large scrubber of mine with a mixture of all these things the weight of the balls will flatten out all the other slice up things.
I can always place the balls in the bottom and gradually add more slice bottles on top but I have to remember that once there is a large quantity of these balls over the bottles it becomes a problem of the pieces being flattened out

 

[qst42know]

Your closed top tank doesn't give you many options for working inside. Ideally you need some plastic fencing or a screen to keep your media above the solution.

I think 4metals had mentioned once before cut lengths of PVC plumbing as a media?

Perhaps a large quantity of cut lengths of 1-1/2"" PVC would be a reasonable bed to keep your media out of the solution.

 

[golddie]

qst42know
Thanks for your help

If I made a bed from 1-1/2"" PVC pipes.
I would have to make holes in them
Here I have drawn something tell me if I can add more to that

http://img834.imageshack.us/f/16892260.jpg/

 

[Barren Realms 007]

You shouldn't have to drill holes in the small plastic pipe.

 

[golddie]

Hi Barren
The little red dots are the holes

 

[Barren Realms 007]

Short pieces means 1"-3" long.

 

[golddie]

I am thinking how I can add 2 different floors with a plastic screen to this tank
Remember I cant go inside maybe I can have pipes
Here is one idea
I lower 4 pipes with threads going through and open them to look like this
http://img717.imageshack.us/i/floorsg.jpg/
Of course I will have to drill little holes in the pipes for air space

Short pieces means 1"-3" long.

Hi Barren
I don't understand this phrase

 

[Barren Realms 007]

I am thinking how I can add 2 different floors with a plastic screen to this tank
Remember I cant go inside maybe I can have pipes
Here is one idea
I lower 4 pipes with threads going through and open them to look like this
http://img717.imageshack.us/i/floorsg.jpg/
Of course I will have to drill little holes in the pipes for air space

Short pieces means 1"-3" long.

Hi Barren
I don't understand this phrase

You would rather have 1" to 3" pieces of pipe cut for your media rather than long pieces with hol drilled in them. You will have less weight in the tank and better dispertion or mix with the short pieces of pipe rater than the long ones with holes in them.

 

[golddie]

I am hoping to throw in those balls and the sliced bottles today or tomorrow
and I am hoping that I don't make a mistake
Its been one mistake after another with everything about this business
On some of the bottles I have the glue which is something I dont like but I dont think it will be a problem
I not putting any bottles with paper on it

qst42know

Ideally you need some plastic fencing or a screen to keep your media above the solution.

I am going to slice up pvc pipes like Barren said and try to create a barrier
Thanks