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unitconversion

Fume Scrubber

by unitconversion Aug 9, 2012
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So this thing will filter and trap the toxic fumes within the case and not venting them out?

Some yes. Mostly it only traps the smell. it all tempest on what you are using as a filter medium. Also need to change or reactivate the charcoal to make sure its doing its job.

Any chance you could upload a STEP file of your design. I use CREO and cannot work with the STL - it's just a dummy file, but I could with the STEP. I'd like to play with the design a little by extending the fan mount bosses down to the angled surface to eliminate the overhang and I also have an Idea for a bracket to allow this to snap onto it. I will share when complete. Thanks.

If you download openscad and the .scad file you can export it in a few formats, but step isn't one of them I'm afraid.

OMG, this thing.....

I printed it, mounted up a print cooling fan (24v), has been working great. I can't smell any abs, helps a lot I say.

However, today I arrive home, look in the enclosure, and the velcro gave way, which spilled the contents on it in the enclosure and some on the print bed. I haven't printed in a few days, and it just had to wait till it was running. The print still looks fine, but I won't really know till its done.

so, lesson learned, you need a mounting bracket. Any ideas?

Comments deleted.

if you google the MSDS of ABS it will point you towards using a organic filter to protect your self.

I googled a bit and found out the following:

Activated charcoal is good at trapping other carbon-based impurities ("organic" chemicals), as well as things like chlorine. Many other chemicals are not attracted to carbon at all -- sodium, nitrates, etc. -- so they pass right through. This means that an activated charcoal filter will remove certain impurities while ignoring others

http://science.howstuffworks.com/environmental/energy/question209.htmhttp://science.howstuffworks.c...

ABS fumes ar non organic as far as I know, so maybee the chemicals just pass through the filter making it useless?

Maybe it does removes the bad smell, but that does of cours not mean that all the chimicals are filtert.....

Does anyone knows how effective this active charcoal is to filter the ABS fumes? Chanes are that some chemicals get through the filter? Maybe there are different types of charcoal (i saw you are using charcoal for a waterfilter, dont know if this is as effective when using in airfilters?)

I think I wil build an enclosure with a fan that sucks the fumes out through a hose, and hang the hose out of a window. Less practical and you suck away warm air, but you are quite sure you get rid of all the fumes.

Of course, this thing would work anywhere fumes are a problem. Say as an overhead solder fume extractor. 

Is that velcro you're using to attach the air filter to the inside of your 3d printer's enclosure? If so, what are you using to stick the velcro to your air filter and to the inside of your 3d printer's enclosure? What type of glue are you using?

You've used it to print lots of stuff and the velcro holds?

Thanks 8-)

I'm using the self-adhesive velcro (like this: http://www.amazon.com/Velcro-Products-Industrial-Sticky-Back-positioning/dp/B004E2IADO/ref=sr_1_3?ie=UTF8http://www.amazon.com/Velcro-P...
&
amp;qid=1345424946
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amp;sr=8-3
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amp;keywords=velcro+industrial+sticky+back ). It works really well and as little as the parts weigh, I haven't had any problems with them falling.

Do you use the fan at full blast or use a microcontroller and / or a stepper motor?

I just run it full blast with the 40mm fan wired straight to 12v power. The design is fairly restrictive so you don't get a whole lot of flow out of it, but it still works pretty well. I'm in the process of coming up with a new design with a higher filter surface area.

This is such a good idea...

How much filament before you need to replace the carbon?

Not sure yet, but I have to imagine the little carton I got at walmart is going to be a lifetime supply.