Abstract: A burner arrangement includes a venturi cluster including a plurality of venturis arranged for parallel flow. The multi venturi arrangement utilizing pressurized fuel as the inducing fluid to induce a flow of air enables the provision of an ultra fuel lean premix of fuel and air. A central burner tube which extends outwardly beyond the delivery end of a primary burner tip and mounts a relatively small capacity nozzle at a substantial distance from the delivery end of the burner tip enabling the ultra fuel lean mixture to expand and slow down such that its linear speed does not exceed the flame speed of the mixture prior to by the flame of the spaced nozzle. A deflector may be positioned adjacent the nozzle to assist in stabilizing the flame after the expansion and slowing process has been completed.

Abstract: A high efficiency liquid fuel atomizer includes an elongated generally tubular member defining a liquid fuel pre-atomization chamber. The tubular member has an outer wall that extends around the chamber, an upstream end adapted for connection to a source of liquid fuel and a downstream fuel delivery outlet. The atomizer also includes a larger diameter outer tube that is concentric to the tubular member and defines a generally annular pressurized atomizing fluid supply conduit disposed in surrounding relationship relative to the chamber. The outer tube has an inlet adapted for connection to a source of pressurized atomizing fluid and a downstream pressurized atomizing fluid delivery outlet. One or more orifices are provided in the outer wall of the tubular member so as to intercommunicate the chamber and the annular conduit to permit pressurized atomizing fluid to enter the chamber and at least partially atomize the fluid fuel therein.