Henry A Young

US Patent:

39946657, Nov 30, 1976

Filed:

Sep 12, 1975

Appl. No.:

5/612670

Inventors:

Henry J. Young - Marblehead MA

Assignee:

Consolidated Natural Gas Service Co., Inc. - Pittsburgh PA

International Classification:

F23L 700

US Classification:

431116

Abstract:

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.