HomeRoast Digest


Topic: Gene Cafe Chaff Fire! (10 msgs / 186 lines)
1) From: Steven Van Dyke
I was roasting up a batch of the India Mallali Estate "Tree-Dried 
Natural" tonight and noticed a couple of chaff flares near the heater 
end of the drum.
Then, right as it was getting to my stopping point (right about the 
recommened FC+) the smoke got *really* thick.  I mean *THICK*.
Then I noticed the flashing red glows in the chaff collector....
Hit the button to start it cooling and opened the sun room door.  I 
was trying to get the chaff collector out to put it outside but it's 
hard to slide on the table I roast on plus it was HOT.  By the time I 
got an oven mitt it was starting to cool.  With the mitt I was able 
to start remove the chaff collector and decide that that was a bad 
idea.  I reached that decision when small bits of smoking chaff 
started to leak out.
Started a fan and closed the door to the house to send the smoke out 
into the cool (about 25 degrees) instead of the house.  The 
ever-indulgent wife was exercising so I couldn't do a full air exchange.
The chaff stopped smoldering fairly quickly and we got the smoke under control.
Strangely, when I dumped the chaff collector it was almost empty - 
just a little bit of chaff and some black and grey specks. ;)
Steve :->
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2) From: Rich
Gee whiz, looks like you can have a chaff fire in any roaster.  High 
chaff coffee is somewhat of a roaster fire hazard.
Steven Van Dyke wrote:
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3) From: John Despres
Steven,
What was your bean volume?
John
Steven Van Dyke wrote:
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trol.
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e.com
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-- =
John A C Despres
Hug your kids
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4) From: miKe mcKoffee
Yup, commercial roasters have been known to have fires too... Kind of cool
our USRC 8 pounder roaster has a temp triggered fire suppression system
build in. Is/can also be use for in drum roast water quenching in one second
increments which we'll be experimenting with on large batches.
Now really off to deal with that Copper River:-)
Kona Konnaisseur miKe mcKoffeehttp://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must">http://www.mcKonaKoffee.comURL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
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5) From: Coffee
Well, I guess that answers that!
Assuming you're already roasting outdoors. Would there be any harm in  
letting the chaff fire burn itself out in the chaff collector of the  
Gene Cafe and continuing the roast?
I'm just askin'
-Peter
On Feb 19, 2008, at 5:48 PM, Steven Van Dyke wrote:
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6) From: Steven Van Dyke
At 08:17 PM 2/19/2008, you wrote:
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Yeah, I was thinking the Gene's were feeling left out of all the fun.
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7) From: Steven Van Dyke
At 10:39 PM 2/19/2008, you wrote:
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Actually, even though it was 'warm' (about 25) I roast in our sun 
room.  It's nicely insulated but with 3 sides exposed it needs a 
suplemental heater to stay nice in the winter.  We left the original 
sliding patio door in place so we can seal it off from the house if 
we want.  I roast out there and, if I want, I can open the door / 
windows and completely flush the room - but not if the wife is 
working up a sweat exercising and it's 25 degrees out.
I *think* you'd be safe letting a small chaff fire run its course but 
I'm not eager to find out.  Mine was at the smoldering / flashing 
stage rather than open flames and since I went to cool as soon as I 
saw it things never got that far - but as I said I wasn't able to do 
much about it either.  If I had been outside I *would* have pulled 
the chaff collector and let things fly.
Steve :->
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8) From: Steven Van Dyke
At 08:32 PM 2/19/2008, you wrote:
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250 grams - I weigh them on a little electric scale to make sure I'm 
ok.  I think the tree-dried just had the exact right type / amount of 
chaff to catch.
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9) From: Coffee
Note to self: Always roast with oven mitts handy...
-Peter
On Feb 20, 2008, at 3:42 AM, Steven Van Dyke wrote:
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10) From: Thomas Pfau
Coffee wrote:
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I have a fire extinguisher nearby, also, and nearly had to use it
recently on my SC/TO. There's an opening in the aluminum band that
supports to TO that chaff can escape through. I have it collecting into
some screening. I noticed some extra smoke one day while roasting and
upon closer examination I found the chaff was on fire. I managed to
control it in the screening until it burned out. Left a nice burn mark
on the SC, though.
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