Crude and waste oil burner

A burner capable of burning crude or other heavy oil fuel from a fuel supply, the burner including a combustion chamber having a cylindrical interior surface surrounded by a wall that includes thermal insulation, the burner comprising:

• (a) an air-fuel injector pipe extending from an outer open end through the wall and opening into the combustion chamber at an inner open end, the air-fuel injector pipe being positioned so that, in the operable orientation of the combustion chamber, the inner end of the air-fuel injector pipe is at a top of the combustion chamber, the air-fuel injector pipe being aligned parallel to and adjacent to a tangent of the cylindrical interior surface of the combustion chamber wall and configured to inject fuel and air into the combustion chamber along the cylindrical interior surface and generate a vortex flow along the combustion chamber;
• (b) an oil supply pipe having an outer end for connection to the fuel supply and extending into and along the interior of the air-fuel injector pipe to an inner open end of the oil supply pipe positioned proximate the inner end of the air-fuel injector pipe, the oil supply pipe having a downturned bend between a venturi insert and the inner open end of the oil supply pipe;
• (c) the venturi insert fixed within the air-fuel injector pipe and having an orifice positioned outward of the inner open end of the oil supply pipe, the venturi insert being within 2 cm of the inner end of the air-fuel injector pipe;
• and
• (d) a combustion air supply including a blower and a recuperator having side by side chambers separated by an impervious common heat conducting wall, the blower being connected to a combustion air inlet of a first of said recuperator chambers, the outer open end of the air-fuel injector pipe being connected to a combustion air outlet of the first recuperator chamber, a second of said recuperator chambers having an exhaust gas inlet connected to the combustion chamber and an exhaust gas outlet, the combustion air supply being configured to flow outgoing combusted gases through the second recuperator chamber and transfer heat through the common heat conducting wall to incoming combustion air flowing through the first recuperator chamber and the air fuel injector pipe.