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Build a Chaff Collector Cyclone
allenb
I'm looking for info on building a home brew chaff collector. It needs to accomplish the following:

- Easy to build (relatively)
-Off the shelf hardware variety parts
-Utilize a 5 gal bucket for collection bin
-No sheet metal fabrication required
-No wire screen for filtration but some kind of cyclonic action
-Doesn't need to be high efficiency in dust size particles
-Work with a small blower (100 cfm, 1-2" static)

I can introduce some bypass air into the inlet to reduce the temperature down from roasting temps.

I'll want to use it in the air stream of roaster exhaust and cooling tray exhaust.

Allen
Edited by seedlings on 04-25-2010 15:35
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
endlesscycles
ebay search: dust cyclone. $89. Can't do better.
-Marshall Hance
Asheville, NC
 
allenb
Is this the dust collector you're referring to on ebay?

http://cgi.ebay.c...602_263622
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
seedlings
Looks good to me.

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
DavidG
Allen,

Here's a link to a detailed narrative from a home-woodworker, and his adventure in building a cyclone dust collector. Our chaff should be easier, I would think, to separate than their sawdust (based on particulate size, density, drag, etc.) http://www.woodce...ndex.shtml

Also, he is recycling back into his shop an ENORMOUS volume of air, so for us roasters we can probably skip the steps of (i) building the impeller fan from scratch [use shop vac], (ii) fabricating the "dust spiral", (iii) building the secondary filters and boxes, (iv) custom 6" ducting to every tool station in the shop with valves to direct airflow.

Unbelievable design, though. This guy plays in a different league than me!!

David
Edited by DavidG on 04-24-2010 07:11
europiccola | yama + coryrod | chemex | AP | clever
wbp1 | wepp1 | bm/hg | co hybrid (still coming soon...)
 
endlesscycles
allenb wrote:
Is this the dust collector you're referring to on ebay?

http://cgi.ebay.c...602_263622


That's the one. I'm getting one for sure, and will report back if you haven't already pulled the trigger.
-Marshall Hance
Asheville, NC
 
allenb
DavidG wrote:
Allen,

Here's a link to a detailed narrative from a home-woodworker, and his adventure in building a cyclone dust collector. Our chaff should be easier, I would think, to separate than their sawdust (based on particulate size, density, drag, etc.) http://www.woodce...ndex.shtml

Also, he is recycling back into his shop an ENORMOUS volume of air, so for us roasters we can probably skip the steps of (i) building the impeller fan from scratch [use shop vac], (ii) fabricating the "dust spiral", (iii) building the secondary filters and boxes, (iv) custom 6" ducting to every tool station in the shop with valves to direct airflow.

Unbelievable design, though. This guy plays in a different league than me!!

David


I'm approaching an extreme level of laziness at this point in my life and the woodshop sheet metal cyclone would be way too much work for me.

I do appreciate the link though. He's done one heck of a home-build rig and there's a lot of very useful design ideas/tips.

I stumbled on this very low-tech rig today that I think would work perfect for chaff and hopefully would catch even the smaller particulates coming out of a roaster although not fine dust.

http://www.jarkma.../bench.htm

The neat part of it is there's no cone shape so any kind of drum of a smallish diameter would probably suffice. Instead of the shop-vac for air movement you could use your choice of blower. You would probably need to go with no less than 2.5" dia duct/hose capable of high temp air. Construction time should be minimal.

Thoughts, comments please
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
allenb
endlesscycles wrote:
allenb wrote:
Is this the dust collector you're referring to on ebay?

http://cgi.ebay.c...602_263622


That's the one. I'm getting one for sure, and will report back if you haven't already pulled the trigger.


I checked the guys website and his products look top-notch. I want to try the junk yard approach before ordering one. I'm interested to hear how it does after you've had time to run some chaff through it.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
seedlings
How about a 5 gal bucket and a paint can? Glue/mount the bottom of the paint can to the underneath of the lid. Cut a hole through the bucket lid, through the paint can bottom for the outlet. Cut a hole in the top, side, of the bucket for the inlet.

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
endlesscycles
seedlings wrote:
How about a 5 gal bucket and a paint can? Glue/mount the bottom of the paint can to the underneath of the lid. Cut a hole through the bucket lid, through the paint can bottom for the outlet. Cut a hole in the top, side, of the bucket for the inlet.

CHAD


That's WAY more sophisticated than my current arrangement, which sees one or maybe two particulates of chaff fly out the window during a 6lb roast.

In other words: Great idea!
-Marshall Hance
Asheville, NC
 
DavidG
seedlings wrote:
How about a 5 gal bucket and a paint can? Glue/mount the bottom of the paint can to the underneath of the lid. Cut a hole through the bucket lid, through the paint can bottom for the outlet. Cut a hole in the top, side, of the bucket for the inlet.


genius. I want to make one, now.

David
europiccola | yama + coryrod | chemex | AP | clever
wbp1 | wepp1 | bm/hg | co hybrid (still coming soon...)
 
allenb
Excellent!

I'll also be making one.

This allows minimal expended labor, able to be built out of common hardware variety stuff and can be thrown together in a short time.

From what I just read on a DIY cyclone site you can save some work by cutting the upper inlet tangential hole in the drum the size of the inlet tube and just shove it in 3 to 4" keeping it hugging the outer edge. This eliminates having to cut the tube into the weird geometric shape to fit the drum's outer curvature. This has a positive effect in reducing turbulence and a resulting increase in cfm. You want to keep the inlet as close to the top of the bucket as possible.

Chad, you may have to patent this.

Allen
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
seedlings
seedlings diy coffee roaster chaff collector cyclone using a 5 gallon bucket and paint can:

i206.photobucket.com/albums/bb54/seedlings/100_6026.jpg

Caulk (or glue) top of paint can:
i206.photobucket.com/albums/bb54/seedlings/100_6027.jpg

To the underneath of the 5 gallon bucket lid:
i206.photobucket.com/albums/bb54/seedlings/100_6028.jpg

Screw lids together (or wait for adhesive to dry):
i206.photobucket.com/albums/bb54/seedlings/100_6029.jpg

Viola:
i206.photobucket.com/albums/bb54/seedlings/100_6030.jpg

Cut outlet hole in top of bucket lid, through paint can, and inlet hole in upper side of bucket:
i206.photobucket.com/albums/bb54/seedlings/100_6031.jpg
i206.photobucket.com/albums/bb54/seedlings/100_6032.jpg

Operation:


Took 45 minutes, including looking around for the most empty paint can and cleaning it out.

CHAD
Edited by seedlings on 04-25-2010 16:09
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
allenb
You don't waste any time. I would have had to ponder the thing for at least a month before getting off the rear end.

From what I've read in the DIY cyclone world your inlet arrangement (centered instead of tangential) would cause some chaff to get sucked into the paint can and into your shop vac.

Any sign of chaff inside your shop vac?

I know the 1 lb San Franciscan table top roaster has the inlet centered but I think it has a sheet metal vane inside diverting the air into a centrifugal vortex around the drum. This is a guess only.

Allen
Edited by allenb on 04-26-2010 14:17
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
 
John Despres
I like it!!!

Do we need something as strong and noisy as a shop vac? Maybe a smaller squirrel cage fan since chaff is so light. Dunno. Thoughts?

John
Respect the bean.
John Despres
Fresh Roast 8, Gene Cafe, JYTT 1k, Quest M3, Mazzer Mini, Technivorm, various size presses and many more brewers.
 
www.sceneitallproductions.com
seedlings
Just so happens I have a small squirrel cage fan... better go try it out, huh? I'll let you know.

Allen, you're right it should come in tangential, but I was lazy and cut a circle instead of an ellipse. Plus, the "rim" around my 5 gal bucket gave me less-than-optimum placement. Still, there was no chaff in the shop vac.

Down to the garage...

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
Ringo
I used a small squarl cage fan its works great, till I opened the cleanout door and chaff went all over the garage. So i learned to turn fan off when I clean it out.;)
Edited by Ringo on 04-26-2010 15:12
 
endlesscycles
Make sure your fan matches or exceeds your roaster output.
-Marshall Hance
Asheville, NC
 
seedlings
Well, there's too much fabrication needed to match a 9 inch squirrel cage opening to a 3 inch hole for test purposes - so tonight's test has been scrapped.

CHAD
Roaster: CoffeeAir II 2# DIY air roaster
Grinder: Vintage Grindmaster 500
Brewers: Vintage Cory DCU DCL, Aeropress, Press, Osaka Titanium pourover
 
Turingalad
(preface: feel free to put my thread wherever it belongs, or let me know if I should start my own...)

I know this is an old thread, but I'm desperate for a chaff-collecting/vent solution for my 1K drum roaster and was wondering:

1) does the paint bucket withstand the heat? (...seedlings...?)

2) does there absolutely have to be a cone? if so, does size/shape of cone matter? Would a paint bucket with just the slightest degree of narrowing from top to bottom work?

3) would I fry a shop vac if I had high heat from a roast pumping through it constantly? (Thinking about a small 1.5hp sho vac attached to variable speed controller to slow it down considerably.)

4) is there currently, or could there be, a thread where people show off their different DIY Chaff-collecting vents?

I'm in an interesting position where I have lots (like, I work for a super pack-rat, apocalypse-prepping, end-times hoarder with barns full... ) of good materials, and pretty much any tool at my disposal. Only thing keeping me is an executable idea, good blue print, and skills (if any are required), like... I don't know how to weld. But maybe this is my chance to learn?
 
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