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Burners Are Backfiring


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#1 jrgpots

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Posted 13 May 2014 - 10:29 PM

What are the most common causes of a burner "backfiring in the tube?
A. Mixing Tube too long
B. Turbulent intake airflow
C. Gas jet too close to the air intake
D. Other


I fired up my conversion kiln tonight. It was windy and the burners kept igniting in the tube, backfiring as it were.

Jed

#2 Tyler Miller

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Posted 14 May 2014 - 01:13 AM

Jed,

 

was the issue limited to a specific psi range or did it occur across all pressures?  I run a very similar venturi burner setup on my forge, and I get some backfiring under certain conditions.    No guarantees that this is the case with your setup, but I'll sometimes get some intermittent burners if my air flow's too high and pressure too low.

 

-Tyler



#3 TJR

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Posted 14 May 2014 - 08:07 AM

Tyler said it.

Do you have a primary air disc on the back of the burner? Try cranking it down more.

or...increase your gas pressure.

TJR.



#4 jrgpots

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Posted 14 May 2014 - 11:00 AM

Thanks guys!

 

It was just too windy last night.  This AM I increased the pressure initially until the burners were warmed up and decreased the airflow.  The roar of the dragon's breath is not quite as loud as before.  But it still has lots of blue flames.

 

Here's a pic of my project.

 

Jed

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#5 TJR

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Posted 14 May 2014 - 04:25 PM

Can't see the burners. Can you adjust the air on them?

Tom.



#6 jrgpots

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Posted 14 May 2014 - 09:29 PM

Can't see the burners. Can you adjust the air on them?
Tom.


I am in the process of fabricating an adjustable disc. So don't laugh too hard, but right now I'm using heat resistant stove tape to cover part of the inlet. Hopefully I will finish the air intakes in two days. I plan on my first cone firing Friday or Sat.

#7 Tyler Miller

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Posted 15 May 2014 - 02:06 PM

Good luck!  Looking forward to hearing how your first firing turns out.






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