Oxygen enriched burner and heating method using oxygen enriched burner

Abstract

An object of the present invention is to provide an oxygen enriched burner which can uniformly heat with excellent heat transfer efficiency even at a position away from the burner, when heating an object to be heated by a self-oscillating flame, and a method for heating using an oxygen enriched burner, and the present invention provides an oxygen enriched burner including a central fluid discharge outlet and a pair of first peripheral fluid discharge outlet and a pair of second peripheral fluid discharge outlets, which are arranged opposite to each other around the central fluid outlet, a pair of openings are provided in side walls of a fluid ejection flow path on the upstream side of the central fluid discharge outlet, the distance between a pair of side walls gradually expands toward the downstream side, a pair of the second peripheral fluid outlet are arranged so as to be orthogonal to the direction facing the openings and sandwich the central fluid outlet therebetween, an angle y° formed by the central axis of the central fluid outlet and the central axis of the second peripheral fluid outlets satisfy a predetermined relationship, an outlet width between the side walls of the central fluid outlet, and an outlet width of the second peripheral fluid outlets in a direction along the outlet width satisfy a predetermined relationship.

1 . A burner which is configured to eject at least one of an oxygen enriched air and a fuel gas from each of a plurality of fluid ejection outlets provided at the tip surface and burns,
 wherein a plurality of the fluid ejection outlets include a central fluid outlet and peripheral fluid outlet arranged around the central fluid outlet,   side walls of a fluid ejection flow path on an upstream side of the central fluid outlet is provided with a pair of openings at opposing positions, and a pair of the openings communicate with each other via a communication pipe,   the fluid ejection flow path on a downstream side of a pair of the openings has a sectional fan shape in which a distance between a pair of the side walls gradually expands toward the downstream side,   the peripheral fluid outlet includes a pair of first peripheral fluid outlets arranged to face each other and a pair of second peripheral fluid outlets arranged to face each other,   the first peripheral fluid outlets and the second peripheral fluid outlets are arranged around the central fluid outlet so as to sandwich the central fluid outlet,   a pair of the second peripheral fluid outlets are arranged in a direction orthogonal to the facing direction of a pair of the openings,   an angle γ° formed by a central axis in an ejection direction of the oxygen enriched air or the fuel gas in the central fluid outlet and a central axis in an ejection direction of the oxygen enriched air or the fuel gas in a pair of the second peripheral fluid outlets satisfies an expression {0°<γ≤15°}, and   an outlet width D 1  between a pair of the side walls at which a pair of the openings are arranged in the central fluid outlet and an outlet width D 2  of a pair of the second peripheral fluid outlets in a direction along the outlet width D 1  satisfy an expression {0.5 D 1 ≤D 2 ≤D 1 }.   
     
     
         2 . The oxygen enriched burner according to  claim 1 , wherein a pair of the first peripheral fluid outlets are arranged so as to sandwich a pair of the side walls in which the openings are arranged from both sides. 
     
     
         3 . The oxygen enriched burner according to  claim 1 , wherein a pair of the first peripheral fluid outlets and a pair of the second peripheral fluid outlets are configured to individually control an amount of the oxygen enriched air ejected or the fuel gas ejected. 
     
     
         4 . A method for heating an object to be heated using an oxygen enriched burner, wherein the oxygen enriched burner is the oxygen enriched burner according to  claim 1 . 
     
     
         5 . The oxygen enriched burner according to  claim 2 , wherein a pair of the first peripheral fluid outlets and a pair of the second peripheral fluid outlets are configured to individually control an amount of the oxygen enriched air ejected or the fuel gas ejected. 
     
     
         6 . A method for heating an object to be heated using an oxygen enriched burner, wherein the oxygen enriched burner is the oxygen enriched burner according to  claim 2 . 
     
     
         7 . A method for heating an object to be heated using an oxygen enriched burner, wherein the oxygen enriched burner is the oxygen enriched burner according to  claim 3 . 
     
     
         8 . A method for heating an object to be heated using an oxygen enriched burner, wherein the oxygen enriched burner is the oxygen enriched burner according to  claim 5 .