Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Using a Blichmann floor burner oustide i the cold.
Reply
 
Thread Tools
Old 12-13-2012, 09:58 AM   #1
abatsch
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2012
Location: Bourbonnais, IL
Posts: 26
Liked 1 Times on 1 Posts

Default Using a Blichmann floor burner oustide i the cold.

So this past weekend my buddy and I were using our blichmann burner for the second time. After using it for the strike and sparge water fine, it back fired by the hose. I was wondering what may have caused this. It happened three times before we brought out the old turkey fryer burner. Some more background info: 46 degrees, tank was starting to to freeze up but worked fine for the other burner(I'm guessing lower pressure) and the wind wasn't too crazy. Any help would be greatly appreciated.


abatsch is offline
 
Reply With Quote
Old 12-13-2012, 10:01 AM   #2
abatsch
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2012
Location: Bourbonnais, IL
Posts: 26
Liked 1 Times on 1 Posts

Default

Sorry, after the strike and sparge water were fine it back fired shortly before reaching the boil.


abatsch is offline
 
Reply With Quote
Old 12-13-2012, 10:03 AM   #3
abatsch
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2012
Location: Bourbonnais, IL
Posts: 26
Liked 1 Times on 1 Posts

Default

Deleted repost.
abatsch is offline
 
Reply With Quote
Old 12-13-2012, 10:54 AM   #4
Pappers_
Moderator
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
Pappers_'s Avatar
Recipes 
 
Join Date: Jan 2009
Location: Chicago
Posts: 12,851
Liked 1274 Times on 875 Posts
Likes Given: 2465

Default

I don't know what you mean by backfired. Would you explain it another way, please?
Pappers_ is offline
 
Reply With Quote
Old 12-13-2012, 02:24 PM   #5
day_trippr
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2011
Location: Stow, MA
Posts: 13,820
Liked 1917 Times on 1493 Posts

Default

I expect he means he saw flames in (and maybe shooting out of) the venturi bell. I run a pair of those Blichmanns and have never experienced that, but I've read of it happening.

Assuming it's not a leak at the crimped-on hose coupling (that's also been reported here at least once)...and given that the floor stand design pretty much precludes insufficient burner-to-pot clearance...and that the burner managed to get through heating up the strike and sparge water without issue... I would guess there wasn't enough gas volume flowing through the burner (perhaps due to that freezing tank) so it back-fired through the venturi.

I can get the same thing to happen when I shut off the gas at the end of a session, but it's just a "pop"...

Cheers!
day_trippr is offline
 
Reply With Quote
Old 12-13-2012, 02:33 PM   #6
JordanThomas
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2012
Location: Grand Rapids, Michigan
Posts: 889
Liked 83 Times on 77 Posts
Likes Given: 426

Default

I'd return it... personally.
JordanThomas is offline
 
Reply With Quote
Old 12-13-2012, 06:22 PM   #7
Pappers_
Moderator
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
Pappers_'s Avatar
Recipes 
 
Join Date: Jan 2009
Location: Chicago
Posts: 12,851
Liked 1274 Times on 875 Posts
Likes Given: 2465

Default

Quote:
Originally Posted by day_trippr View Post
I expect he means he saw flames in (and maybe shooting out of) the venturi bell. I run a pair of those Blichmanns and have never experienced that, but I've read of it happening.

Assuming it's not a leak at the crimped-on hose coupling (that's also been reported here at least once)...and given that the floor stand design pretty much precludes insufficient burner-to-pot clearance...and that the burner managed to get through heating up the strike and sparge water without issue... I would guess there wasn't enough gas volume flowing through the burner (perhaps due to that freezing tank) so it back-fired through the venturi.

I can get the same thing to happen when I shut off the gas at the end of a session, but it's just a "pop"...

Cheers!
I don't know what the venturi bell is (and google didn't help) - is that the piece where you control the air/oxygen flow?

I also get a 'pop' when I turn off the gas, but have never paid much attention.
Pappers_ is offline
 
Reply With Quote
Old 12-13-2012, 07:43 PM   #8
sctocinci
Junior Member
HBT_SUPPORTER.png
Feedback Score: 1 reviews
 
sctocinci's Avatar
Recipes 
 
Join Date: Jul 2011
Location: Cincinnati, OH
Posts: 96
Liked 5 Times on 5 Posts
Likes Given: 1

Default

Stick the tank in some warm water and see if it still happens. I have to do this on a cold day to keep the pressure up some times.
__________________
Kegerator Now Set Up!
Keg 1: Saison
Keg 2: EMPTY
sctocinci is offline
 
Reply With Quote
Old 12-14-2012, 04:49 AM   #9
day_trippr
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2011
Location: Stow, MA
Posts: 13,820
Liked 1917 Times on 1493 Posts

Default

Quote:
Originally Posted by Pappers_ View Post
I don't know what the venturi bell is (and google didn't help) - is that the piece where you control the air/oxygen flow? [...]
The piece that controls the air flow is a damper. The damper covers the mouth of the bell-shaped induction manifold. The pressurized gas passing through the flare fitting in the center of the damper pulls air through the damper openings, a phenomenon caused by the venturi effect - which occurs within the "bell".

Not all of the required make-up air for full combustion at the nozzle tips is provided via the induction system - additional air is required at the nozzle tips. If this wasn't the case you'd always have a roaring fire within the manifold (not good).

When the gas flow declines too far the air/fuel ratio within the manifold will approach the level required for combustion, and you'll get the "back fire" effect.

Thus I expect this was yet another case of the contents of the propane tank getting so cold the evaporative pressure dropped too low to maintain the excessively rich air/fuel ratio within the manifold, and it lit up...

Cheers!
day_trippr is offline
 
Reply With Quote
Old 12-14-2012, 05:05 AM   #10
sudbuster
This ain't my first rodeo....
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
sudbuster's Avatar
Recipes 
 
Join Date: Jul 2007
Location: Western Arkansas
Posts: 4,068
Liked 276 Times on 216 Posts
Likes Given: 95

Default

Quote:
Originally Posted by Pappers_ View Post
I don't know what the venturi bell is (and google didn't help) - is that the piece where you control the air/oxygen flow?

I also get a 'pop' when I turn off the gas, but have never paid much attention.
Did you notice that the "old turkey frier" saved the day? I love those things. 60,000 btu of reliable, cheap heat.


sudbuster is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Blichmann Floor Burner ArcticBear Equipment/Sanitation 29 05-18-2013 04:35 AM
Blichmann Floor Burner Measurements DeanMachine Brew Stands 2 05-25-2012 01:03 AM
For Sale - WTB - Blichmann Floor Burner jskinner10 For Sale 0 02-14-2012 04:45 AM
For Sale - Blichmann Floor Burner For Sale sredz For Sale 6 10-07-2011 04:57 PM
For Sale - Want To Buy Blichmann Floor Burner MaltedLiver For Sale 2 03-12-2011 03:36 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS