Using old school wood burning design but with propane

[00Buck]

Has anybody ever built a draw furnace to power their rig but instead of wood using a propane burner? Idea behind it is being able to distill on the grain if I ever wanted to. Not really set up for electric elements and I dont have a core built into my boiler so this was the next best thing I could thing to do with an old trash can, some rock and quickcrete. It would make a pretty backyard ornament too

[Pure Old Possum Piss]

Not sure if this is what you mean but... I took an old 55gal drum and cut the top out of it. I put a bunch of 1" holes just under the top lip to draw air.
I then flipped it upside down and traced the outer diameter of my boiler keg on what was the bottom. I cut it out so I could slide the barrel down over the keg and burner. You only want a few inches of the keg to sit up above the barrel. You'll need to measure up from the ground to where you light your propane burner and cut an opening on the side of the barrel to match, makes lighting it a lot Easier. You might need to have a few blocks next to the burner to raise the keg high enough to just come out of the barrel. This way your flame isn't right on the keg bottom but it heats the whole keg like a big oven. You can also wrap the barrel oven in insulation and it will take even less gas to get it up and hold it at temperature.
This cut my propane cost almost in half since it takes a very small flame to keep it at temp once it heats up. And it no longer sounds like a Phantom Jet is roaring in my shed.

[00Buck]

Not sure if this is what you mean but... I took an old 55gal drum and cut the top out of it. I put a bunch of 1" holes just under the top lip to draw air.
I then flipped it upside down and traced the outer diameter of my boiler keg on what was the bottom. I cut it out so I could slide the barrel down over the keg and burner. You only want a few inches of the keg to sit up above the barrel. You'll need to measure up from the ground to where you light your propane burner and cut an opening on the side of the barrel to match, makes lighting it a lot Easier. You might need to have a few blocks next to the burner to raise the keg high enough to just come out of the barrel. This way your flame isn't right on the keg bottom but it heats the whole keg like a big oven. You can also wrap the barrel oven in insulation and it will take even less gas to get it up and hold it at temperature.
This cut my propane cost almost in half since it takes a very small flame to keep it at temp once it heats up. And it no longer sounds like a Phantom Jet is roaring in my shed.

No but thats a pretty good idea too. I was thinking of how it was done back when you had to fire it up with wood. You cut both ends outta drum or trash can and lay it down. But one end against the boiler and the other end is facing you. Build it up with brick, rock whatever around it.

[NZChris]

If you are heating a keg above the liquid level, watch out for the burn on that some posters have reported.

[shadylane]

Wood fired needs a chimney and air control to the fire box.
With propane it's easier, basically all that's needed is a shroud to keep any wind from messing with the flame and the heat around the lower 1/3 of the pot. If your rig is already set up for wood, rake out the fire box and stuff in a burner that will fit.

[Yummyrum]

Here is a good old topic about wood burners .

viewtopic.php?p=7648163#p7648163

But I agree with Shady . A gas burner seems to work as is just fine . When the air intake is set for clean burn, not much else needed except keep the heat around the lower part of the boiler where the liquid is . A Chimney , while essential to cause draw on a wood fire , only serves as an outlet for burnt gas Fumes .