Combustion burner and combustion apparatus provided with...

F - Mech Eng,Light,Heat,Weapons – 23 – D

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F23D 1/00 (2006.01) F23C 5/08 (2006.01)

Patent

CA 2234771

A combustion burner includes a mixture nozzle, a gas supply nozzle, and guide means. The mixture nozzle extends toward an interior of a furnace, and defines a mixture passage through which a mixture containing powdered solid fuel and gas for transferring the solid fuel flows. A distal end portion of the mixture nozzle is flared so that a flow passage area of the mixture passage increases progressively in a direction of flow of the mixture. The gas supply nozzle radially surrounds the mixture nozzle to define between the gas supply nozzle and the mixture nozzle a gas passage through which a combustion oxygen-containing gas flows toward the furnace. The guide means is provided within the mixture nozzle at a position upstream of the flared portion of the mixture nozzle with respect to a flow of the mixture so as to make the mixture flow straightly along an inner peripheral surface of the flared portion of the mixture nozzle.

Un brûleur de combustion qui comprend une buse, un gicleur d'alimentation en gaz et un moyen de guidage. Le gicleur de mélange est disposé dans un foyer de façon à définir un passage d'écoulement du mélange, au travers de quoi s'écoule un mélange contenant un combustible solide en poudre et un gaz pour le transport du combustible solide. L'extrémité en pointe du gicleur de mélange diverge de telle façon qu'une surface en coupe du flux du passage d'écoulement du mélange s'accroît graduellement le long du flux du mélange. Le gicleur d'alimentation en gaz est disposé de façon à entourer radialement le gicleur de mélange pour définir entre lui et le gicleur de mélange un passage de flux de gaz, au travers de quoi un gaz contenant de l'oxygène pour la combustion s'écoule vers le foyer. Le moyen de guidage est disposé en amont de la partie divergeante dans un flux de mélange à l'intérieur du gicleur de mélange de sorte que le mélange s'écoule de façon linéaire le long d'une surface périphérique intérieure de la partie divergeante du gicleur de mélange.

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