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A easier way to filter dust collector exhaust air

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Forum topic by b2rtch posted 07-29-2010 03:40 PM 1829 views 0 times favorited 11 replies Add to Favorites Watch
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b2rtch

4822 posts in 2510 days


07-29-2010 03:40 PM

On another forum we had all this very interesting interaction about the possibility to use water to clean the air exiting the dust collector.It seems that the idea is feasible but not very easily.

This morning I have another idea which seems to be effective, relatively inexpensive and easy to do.

This morning ( very early in the morning ) I was reading this from 3M website:

Air Filter Technology
“Our filters are unique
All Filtrete™ Air Cleaning Filters are electrostatically charged. As air passes through the filter, airborne particles are attracted to and captured by the filter’s pleated fabric. Our electrostatic filters capture both large and small particles
  • down to 0.3 microns in size.
    This is different from fiberglass, washable, and non-electrostatic pleated filters, which have no charge. Without electrostatic properties, these other filters can’t capture the smaller particles as effectively.”

Bill Pentz recommends 0.5 micron, so this far exceeds this recommendation.
Bill uses cartridge filters which are extremely expensive.
I was thinking that it would be piece a of cake to build a wooden or metallic frame to stack these filerette filters in 2 or 3 or even 4 high.
One could use a 2.”x2.” and dado a 2.00” grove on 2 of the sides , and build a square frame and stack 2 or 3 of these filters high to replace the bag on his dust collector.
This should work pretty well with a low back pressure.
t would be easy and relatively inexpensive to replace the filters when they are dirty. These filters come in a multitude of sizes so one can customize the size of his filter to his need.
What to you think?

When my shop is finished I shall try it.

-- Bert


11 replies so far

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PurpLev

8523 posts in 3110 days


#1 posted 07-29-2010 03:48 PM

I have these filters and I use them with a box fan for finishing (and I used it in the shop before getting a proper air filteration unit).

These are ~$24 for a pair at Costco as far as I remember for (2) 20”x20” filters, and to setup the equivalent of the 274sqft Wynn cartridge filter I think you’ll need more than a couple of those – which might not be financially worth the hassle. the DC dedicated filters usually are reusable, and can be cleaned from the inside (with a paddle of some soft – depending on your DC) or with low PSI compressed air from the outside. the 3M filters are not that durable.

Is it really worth all that trouble to setup (+paying more)? really up to you.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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b2rtch

4822 posts in 2510 days


#2 posted 07-29-2010 03:59 PM

PurplEv: can be cleaned from the inside (with a paddle of some soft )”
I know that this is what the claim is but in reality I recently read that this is not quite true because the rubber paddle in fact destroys the filter creating holes in the pleads.

-- Bert

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PurpLev

8523 posts in 3110 days


#3 posted 07-29-2010 04:07 PM

I have NEVER seen any filters that got ruined by the paddle. maybe after YEARS of hard use… but then if you calculate hoe many of the 3M filters would have had to be replaced in that time it would still favor the DC filters. FYI the DC filters are completely sealed, whereas with the 3M you’d still need to efficiently seal all the seams between the filters.

not saying it’s not doable – it’s VERY doable, but from my calculations – will take quite a bit of work, that I would rather spend woodworking, and will eventually be more spendy than just getting a $100 DC dedicated filters that can just be taken out of the box, and put into use.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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b2rtch

4822 posts in 2510 days


#4 posted 07-29-2010 04:22 PM

PurpLev, I though that the filters were more expensive ( http://www.wynnenv.com/cartridge_filters.htm) because I have access to Farr filters I checked the price with local dealer and the price , about a year ago , was close to $300.00. So you are rigth, this is not worth it.
In your experience how long a filter last?

-- Bert

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PurpLev

8523 posts in 3110 days


#5 posted 07-29-2010 04:31 PM

the Wynn filter will probably last me a lifetime.

I don’t use the 3M filter that often (only for finishing) and so far its’ holding up fairly well – although It doesn’t have to filter and accumulate dust. I already banged one filter, and had to disregard, as it ripped. per 3M specs I think they suggest to replace them every 3-6 months (I honestly don’t remember – you could check it out with 3M) for normal use.

not trying to bump your ideas – I think they are great ideas, and It’s refreshing to see someone coming up with so many of them – just trying to give you some input from personal experience.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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ClayandNancy

511 posts in 2477 days


#6 posted 07-29-2010 04:31 PM

Not a bad idea. Purplev brings up a good point, have you figured how many you would need to get the area you sqft wise? I don’t think sealing would be that high a hurdle to get over. Some foam tape in the dados could seal the filters.

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b2rtch

4822 posts in 2510 days


#7 posted 07-29-2010 04:37 PM

PurpLev ” not trying to bump your ideas – I think they are great ideas, and It’s refreshing to see someone coming up with so many of them – just trying to give you some input from personal experience.”
No problem. I always enjoy reading you and it is good to have someone to counter balance my dreams.
As I wrote somewhere else about you, you always come up with good and intelligent comments and answers, thank you for that.
Bert

-- Bert

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b2rtch

4822 posts in 2510 days


#8 posted 07-29-2010 04:55 PM

CessnaPilotBarry ( that’s quite a name!)
Thank you for your input.
A paddle seems to work just fine but to be on the safe side , one could install a vibrator so nothing would contact the paper filter at all.

-- Bert

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b2rtch

4822 posts in 2510 days


#9 posted 07-29-2010 05:23 PM

CessnaPilotBarry what is the brand of your cyclone?

-- Bert

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PurpLev

8523 posts in 3110 days


#10 posted 07-29-2010 05:37 PM

I think Barry has this JDS cyclone:

-- ㊍ When in doubt - There is no doubt - Go the safer route.

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b2rtch

4822 posts in 2510 days


#11 posted 07-29-2010 05:49 PM

Thank you PurpLev

-- Bert

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