Free Heat and A Cool (almost) Flamethrower...

[69_knives]

After getting my waste oil forge working so well and realizing there's so much potential in waste oil energy I decided to start a project that I fully intend to heat the house with.

This is the burner portion The burner will go inside an 8" or so pipe that will be sealed except for an exhaust and there will be an air jacket around that. There will be an air inlet and 1 or 2 outlets and a blower that will blow air through the air jacket sucking air from the house and blowing it back in after it is warmed.

I will post more as it becomes more developed and closer to completion.

 

[Stacy E. Apelt - Bladesmith]

That is called a heat excganger, and it works well.
There are several commercial waste oil burner conversions for oil heaters and boilers that don't amount to much more than your plan. There is a lot of safety equipment on them, though. Things like electronic ignition, photo-electric flamer detector,safety shut-off, etc.
Be sure that all welds are air tight, and that the air circulation piping is insulated from any flamable objects. Ther flame tube should be robust. The air exiting the heat exchanger can be very hot, so test it a lot before installing it. A high temp cut-off thermal sensor in the air duct to the house would be a good idea.
As with any flame generated heating device, a CO detector is essential.

I built a similar exchanger for my dryer exhaust to return the heat to the house. Exchangers are also excellent to recover heat going up the stove pipe from a wood stove.

Stacy

 

[69_knives]

In my never ending quest for simplicity, I think I've already changed the design.

I'm thinking I will just use a modified flame tube as the radiant heat source instead of a flame tube inside a pipe.

Basically it will be two 2' lengths of 4" square 3/16" wall stacked up on each other, a 4" or so notch cut out of each at one end and welded together at that point air tight, then a cap welded over that end. basically the flame tube becomes 4' in length it just has to make a turn and the exhaust flue will be directly above where the burner enters the lower tube. This should "KISS" and extract the most heat from the flame without becoming too large or complex. Will definitely have to do some testing, maybe 18" length tubes will be long enough.

I forgot to mention that I was planning on running it outside with insulated ducting going to/from a couple of windows and using plywood window inserts with the ducting through ports mounted.