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A recirculating burner for burning a vaporizable liquid fuel comprising a housing, a combustion chamber in the housing, with inlet and outlet, a vaporizing chamber, with inlet and outlet, an air inlet for directing air under pressure into the combustion chamber, a fuel inlet atomizer, adjacent to th

A recirculating burner for burning a vaporizable liquid fuel comprising a housing, a combustion chamber in the housing, with inlet and outlet, a vaporizing chamber, with inlet and outlet, an air inlet for directing air under pressure into the combustion chamber, a fuel inlet atomizer, adjacent to the vaporizing chamber inlet, for automizing vaporizable liquid fuel and directing the fuel into the vaporizing chamber, a gaseous fuel inlet for feeding gaseous fuel into the combustion chamber, a first passage interconnecting the combustion chamber toward the combustion chamber outlet with the vaporizing chamber inlet, for receiving hot combustion gases from the combustion chamber, a second passage effectively interconnecting the vaporizing chamber outlet with the combustion chamber inlet, the air inlet communicating with the second passage, and a vortex generator at the interface of the fuel inlet atomizer, the first passage, and the vaporizing chamber inlet, the generator being rotatable with respect to the housing between two positions, a first open position in which the generator receives hot gases from the first passage and swirls them into a vortex, into which the fuel atomizer directs atomized fuel, for vaporization of the fuel by the gases in the generator and vaporizing chamber, and the first passage, generator, vaporizing chamber, and second passage together define a recirculation path for hot combustion gases from the combustion chamber, and a second closed position in which the generator blocks the recirculation path, and the gaseous fuel inlet feeds gaseous fuel into the combustion chamber for burning therein.

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A recirculating burner for burning a vaporizable liquid fuel comprising: a housing, a combustion chamber in said housing, said coMbustion chamber having an inlet and an outlet, a vaporizing chamber in said housing, said vaporizing chamber having an inlet and an outlet, an air inlet in said housing f

A recirculating burner for burning a vaporizable liquid fuel comprising: a housing, a combustion chamber in said housing, said coMbustion chamber having an inlet and an outlet, a vaporizing chamber in said housing, said vaporizing chamber having an inlet and an outlet, an air inlet in said housing for directing air under pressure into said combustion chamber, a fuel inlet atomizer in said housing, adjacent to said vaporizing chamber inlet, for atomizing vaporizable liquid fuel from a source of the same and directing said fuel into said vaporizing chamber, a gaseous fuel inlet in said housing for feeding gaseous fuel from a source of the same into said combustion chamber, a first passage interconnecting said combustion chamber toward said combustion chamber outlet with said vaporizing chamber inlet, said first passage being arranged to receive hot combustion gases from said combustion chamber, a second passage effectively interconnecting said vaporizing chamber outlet with said combustion chamber inlet, said air inlet communicating with said second passage, and a vortex generator in said housing at the interface of said fuel inlet atomizer, said first passage, and said vaporizing chamber inlet, said vortex generator being rotatable with respect to said housing between two positions, a first open position in which said vortex generator receives hot combustion gases from said first passage and swirls them into a vortex, into which vortex said fuel inlet atomizer is adapted to direct atomized liquid fuel, for vaporization of said fuel by said hot gases in said vortex generator and vaporizing chamber, and said first passage, said vortex generator, said vaporizing chamber, and said second passage together define a recirculation path for hot combustion gases from said combustion chamber to said vaporizing chamber and back to said combustion chamber, where vaporized fuel is burned with air from said air inlet, and a second closed position in which said vortex generator blocks the flow of hot combustion gases from said first passage to said vaporizing chamber, thereby blocking said recirculation path, and said gaseous fuel inlet feeds gaseous fuel into said combustion chamber for burning therein with air from said air inlet.