Thanks: 0
Likes: 0
Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 9 of 9
Thread: Dust collector-water filter
-
10th September 2006, 01:03 AM #1New Member
- Join Date
- Sep 2006
- Location
- Toronto, ON
- Posts
- 2
Dust collector-water filter
I've tried searching for this:
Has anyone seen those late night commercials where they sell a vacuum that uses water as a filter? We bought one and it works great. The dust is trapped by the water and virtually no dust exits the vacuum.
Can I adopt this method for my dust collector? The idea replace the filter bag on my collector with a 6" or 8" plastic pipe that runs to a sealed garbage can that is half filled with water. The plastic pipe would sit below the water line. There would be a second pipe sitting high above the waterline that would exhaust back into the room. Any dust blown into the garbage can would get trapped by the water.
Is it really that simple? Somehow I don't think so. I imagine the collector would probably lose some serious suction.
Any ideas/comments would be great.
-
10th September 2006 01:03 AM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Posts
- Many
-
10th September 2006, 02:10 AM #2
There is a commercial incinerator in Auckland (NZ) that uses just that principle for cleaning the smoke from the incinerator before exhausting it.
Yeah - serious loss of suction - depending on how deep the tube is, the vacuum cleaner / dust collector has to lift that equivalent weight in water continuously. The tube would have to be deep enough in the water to actually cause it to bubble, rather than just pushing the water out of the way to have a chance to collect all the dust. The system could be improved by adding a small amount of detergent to the water. Not enough to cause a cascade of bubbles through the workshop, but enough to decrease the surface tension of the water, making it easier for the dust to get wet, and therefore trapped. A small amount of frothing is a good thing - aids the collection process in the same way as foam on a beach."Clear, Ease Springs"
www.Stu's Shed.com
-
11th September 2006, 11:07 PM #3.
- Join Date
- Feb 2006
- Location
- Perth
- Posts
- 27,791
Correct, as Stu says serious suction loss. The system you describe works for High pressure low volume systems. DCs are the opposite, they work on High volume, low pressure. Even the higher powered units only generate 10's of inches of water pressure differential. Most of this is often used to move the air and dust through the ducting and the there is often little left to force the air through the filter bags. If you were then to add a water head to the end of a regular DC the suction would drop to a poofteenth of BA.
Best Solutions - cyclone, or put the DC outside the shed.
Cheers
-
11th September 2006, 11:19 PM #4
You'd do better adding high pressure fine water mist(after bag filters)we do at work... but Our 2 extractor fans are about 5m in dia driven by motors about the size of a medium car!(the 206m high outlet stack can be seen from about 50km away!)
The whole air flow must go through the sprays.....................................................................
-
11th September 2006, 11:42 PM #5.
- Join Date
- Feb 2006
- Location
- Perth
- Posts
- 27,791
-
12th September 2006, 12:02 AM #6SENIOR MEMBER
- Join Date
- Aug 2005
- Location
- kiama
- Posts
- 626
I think there may be a good chance that this would work but in a different form.
Some spray booths work on a water filtering system, the most common is one by Binks bullows.
It uses a trough of water and above it is a saw tooth opening touching the top of the water. Air is drawn through the teeth and it makes the water rise into the exhaust duct. Inside the duct are baffles and the water drawn up eventually falls back down and over the baffles.
This makes it necessary for overspray, dirt and fumes to pass through the water spray which collects them. It is rated at about 98% efficient to stop all pollutants reaching the outside air.
I've used one to collect sanded dust from paint and no dust gets past the water fall. Whether it would be worth the time and effort to match your dust extractor up with such a device is another thing.
OH, and when you need to clean out the water you are scooping up sludge from the bottom of the water tank. Messy!!!
-
12th September 2006, 12:05 AM #7
Dust collector-water filter
I once worked in a weaving shed, and it had a fine mist going at all times, as the looms were running 24 hours a day. It collected the fine lint and deposited it onto the floor, (and workers), and everything else, but made the lint manageable. The mist could hardly ever be felt on ones face so it was very fine.
To apply that idea to fine sawdust, may mean the stuff is landing on everything in a damp condition, saw tables etc; starting rust as soon as it lands. Once damp, it may also breed some sort of nasty as well.Buzza.
"All those who believe in psycho kinesis . . . raise my hand".
-
12th September 2006, 12:12 AM #8
Look up wet scrubbers.
Pressurised water sprays to clean up exhaust air.Cliff.
If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.
-
12th September 2006, 12:19 AM #9
Now I'll bet you must get some nice sludgy stuff out of that lot?
Thats why they use it, the sludge is pumped back into the process, no wastage.....................................................................
Similar Threads
-
A Dyson Dual Cyclone Dust Extractor
By Turbulance in forum DUST EXTRACTIONReplies: 5Last Post: 29th September 2010, 02:13 PM -
Charcoal Filter for Room Type Dust Filter
By bitingmidge in forum HAND TOOLS - POWEREDReplies: 10Last Post: 10th December 2008, 04:36 PM -
Filter Bag material for dust extractor
By Darryn in forum DUST EXTRACTIONReplies: 14Last Post: 30th March 2008, 12:09 AM -
Fine dust filter wanted.....Apply below.
By ozwinner in forum WOODWORK - GENERALReplies: 3Last Post: 12th July 2004, 03:13 PM -
Workshop Dust Filter Blower
By barrysumpter in forum WOODWORK - GENERALReplies: 6Last Post: 23rd August 2002, 09:53 PM