초록 ▼

A multi-fuel gas burner using preheated forced draft air, comprising a cylindrical inner burner tube, supported by the wall of a furnace, and inserted into an opening in said wall, and including means to inject through the upstream end combustion air preheated to a selected temperature, and compress

A multi-fuel gas burner using preheated forced draft air, comprising a cylindrical inner burner tube, supported by the wall of a furnace, and inserted into an opening in said wall, and including means to inject through the upstream end combustion air preheated to a selected temperature, and compressed to a selected pressure. The downstream end of the inner burner tube closed, and a plurality of longitudinal slots, circumferentially spaced, in the wall of the tube at the closed end. Means to inject rich fuel gas up to 3,500 btu/cu feet under selected pressure into the inner burner tube along its axis. An outer burner tube axially surrounding said inner burner tube and forming an annular passage therebetween. Means to pass low pressure, lean, combustible gas of as low as 50 btu/cu feet down said annular passage and outwardly through a circumferential slot at the end of said outer burner tube inside the furnace. The hot combustion air and rich gas flowing through the inner burner tube and radially outwardly and rearwardly through the plurality of slots, flow against and mix with the lean gas flowing outwardly through the circumferential slot, and burn against the surface of a tile, having a central opening, through which the burner is inserted into the furnace.

대표청구항 ▼

A multi-fuel gas burner using preheated, forced-draft air, comprising: (a) a cylindrical inner burner tube, supported by a wall of a furnace, and inserted into an opening in said wall having tile, capable of becoming radiant, surrounding the opening on the inside surface of said wall; means to injec

A multi-fuel gas burner using preheated, forced-draft air, comprising: (a) a cylindrical inner burner tube, supported by a wall of a furnace, and inserted into an opening in said wall having tile, capable of becoming radiant, surrounding the opening on the inside surface of said wall; means to inject, through the upstream end of said inner burner tube, combustion air heated to a selected temperature and compressed to a selected pressure; (b) the downstream end of said burner tube closed and a plurality of longitudinal slots, circumferentially spaced in the wall of said tube at said closed end and oriented so as to direct gases issuing therefrom toward said tile; (c) an outer burner tube axially surrounding said inner burner tube, forming an annular passage therebetween; (d) means to selectively introduce low pressure lean combustible gas into said annular passage toward the distal end thereof; (e) means to direct said lean gas from said annular space to meet and turbulently mix with said combustion air in the vicinity of said tile to assist, after ignition, the complete combustion of said lean gas adjacent said tile, and thus radiantly heat said wall to a temperature sufficient to maintain ignition of said lean gas-air mixture; and (f) means to selectively inject rich fuel gas downstreamwise, under a selected pressure and selected ratio of said lean combustible gas to said rich fuel gas, into said inner burner tube at a point downstream of said upstream end.