So I just finished building my all grain stand a couple days ago. We decided to fire it up for the first time today and simulate a brew with water just to make sure everything works out fine.
When we fired up our boil burner (10" Banjo Burner) we adjusted the vents to get a nice blue flame. However, upon placing the kettle on top of the burner our flame was choked and instantly turned a bright bright yellow.
Here is how the Boil burner is setup:
We tried simulating this with one of our other burners for the Mash Tun to see if we got the same effect. Even with the kettle on the flame maintained a nice blue with very little yellow.
Here is how the Mash Burner is setup:
As you can see, there is significantly more space in between the stand and the heat shield on the burner for the Mash than there is on the burner for the Boil. This was done because we are using two different pots that dont have the same diameter on the base.
My best guess is that the burner for the Mash gets more air flow to the flame than the burner for the boil due to this extra space. When we place the kettle on the boil our guess is the flame is getting choked too much.
I'm looking for ways to try and improve air flow to the boil burner. So far the idea that seems to sound best is to drill holes or cut gaps into the heat shields here:
I feel like this will allow more air to get to the flame and prevent all the wasted energy. But before I start cutting I wanted to get the opinions of all you esteemed members of the HBT forum.