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Waste Oil Burners
Pictured above is a Beckett "S" type burner that I modified to burn waste motor oil.
Click on any image to see a larger version.
-External Pressure Regulator Drawing
Background:
This is the waste oil burner project page. First of all this project was brought on by the
continuing rise of heating & energy costs these days, and to make use of and at the same time dispose
of waste oils in a more environmentally friendly way. Heavy oils need a little more attention to
burn than fuel-oil. First the oil has to be pre-heated, up to 180 degrees for used motor oils, then
you have to atomize it. Probably one of the easiest ways to atomize the oil is by using what is
called an air atomizing nozzle. The basic difference between a fuel oil burner and a waste oil burner is
that they have either an internal or external pre-heater to heat the oil, and an air atomizing nozzle
instead of a pressure nozzle. Other than that the gun is basically the same design and the flame
retention head has a more defined air pattern. Below are some details and pics of how I converted
a fuel-oil gun type burner to burn used motor oil. This is a fully automatic unit.
Construction:
First thing was to find a burner with at least a 6" blast tube to work with. First thing I did
was disassemble it. You need the long blast tube if you're going to use an internal pre-heater
because of the length, mine is about 6.5 inches long. Once I knew what I had to work with, I
next made up a mold to cast the pre-heater block in aluminum. Next thing was to do the machining
after I recieved the band heaters. The 3rd image shows the stock chucked in the lathe and last is
the finished product. The pre-heater has 2 passages, one for the oil and one for the air supplying
the nozzle. You want to pre-heat the air along with the oil. The oil passage goes straight through
and the air passage meets up with the ports on the bottom.
Next is the assembly of the pre-heater block and nozzle adapter. These images show the
assembly progress. Getting the pre-heater built was one of the main accomplishments on this project.
Next was putting it all together and wiring the digital temperature control, primary control,
and I also put in a manual switch and pilot lamp for the pre-heaters, this came after a whole lot
of experimentation of different nozzles and different ways of feeding oil to the nozzle. The pics
of the primary and digital temperature controller are above. The temp controller gets it temp feedback
from a "J" type thermocouple. I'm not finished with the project yet but the method of feeding
the nozzle will be using the original pump modified for heavier oil and feeding slight pressure.
This will also give me a point to adjust the firing rate. Click Here
to view the drawing of my secondary oil pressure regulator that compliments the pumps internal regulator to
get a much lower pressure for feeding the siphon nozzle. If you
have questions you can Email Me
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