Dust collector exhaust air bong filter

The Borg and other places sell exactly that for sanding drywall. It should work for fine wood dust.

-- John, in Minnesota

Tillman said

then John, in Minnesota, said

Probably a real bitch to clean, however.

On 16 May 2004 17:58:00 -0700, tillman snipped-for-privacy@comcast.net (tillius) brought forth from the murky depths:

Your quality of life is not worth a mere $14.95 to 24.95?

--- - Sarcasm is just one more service we offer. -

Bong?

I haven't tried it for dust, but this idea works great for indoor dryer lint traps.

Barry

"Rainbow" makes/made a vacuum cleaner that works in exactly that fashion. With only 'so-so' effectiveness at keeping the really fine stuff down.

I'd see _practical_ difficulties with a dust-collector -- due to the _volume_ of air involved, and the need to have _little_ bubbles. Which translates into the need for a non-trivial area of bubble-generation. WAG says probably 'several' square _feet_ per 1000 CFM capacity.

Not to mention the static-pressure requirement. A water filter induces A back-pressure of _at_least_ 1-1/4 PSI, per inch of water depth. the effectiveness of particle removal goes up as (a) the bubbles get smaller, and (b) the depth of the water gets greater. To scrub _small_ particles, you may need several inches of water, _and_ some 'mesh' layers (to break up larger bubbles that have formed by coalesense).

With proper consideration of design, one can probably cobble up something that will work. It likely won't be simple, nor inexpensive (regardless of how 'cheap' it's built :), however.

Actually, my shop vacuum cleaner uses the same thing. A very old one, "Thermax" or whatever the name of the company was. I've got it in-line with a centrifugal cleaner. The water filter is the last element. All I can say is: it works a treat. Not one bit of fine stuff gets out of that wet bucket. If it gets into the intake, then it's gone. I'm surprised the system is not more widely used. It makes a lot of sense to me.

I would guess that bubbling that volume of air through water would be a real task. Sure a large wet filter pad might be effective, but what about running the exhaust air through a spray chamber? I'm sure that would get rid of most of the fines. The commercial/industrial way is to run it through a grid of electrostatically charged wires and electrostatically precipitate all solids.

I once had a monstrous centrifugal fan directing air into my lounge room with mist sprays directed into the intake. The effect was fabulous on a hot, dry day, and the ferns in the lounge room just loved it :)

Slang. Water pipe.

If he doesn't know what a bong is, he probably thinks "water pipe" has something to do with plumbing.

Try googling for "hookah".

-- John G. in Memphis, TN Just Say(tm P.L.): "Howdy Officer"

By Tue, 18 May 2004 03:28:04 GMT, JG decided to post "Re: Dust collector exhaust air bong filter" to rec.woodworking:

Bogart.

/..

LOL.