초록 ▼

A combustion burner includes a mixture nozzle, a gas supply nozzle, and a flow guide. 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 o

A combustion burner includes a mixture nozzle, a gas supply nozzle, and a flow guide. 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 flow guide 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 straight along an inner peripheral surface of the flared portion of the mixture nozzle.

대표청구항 ▼

[ What is claimed is:] [1.] A combustion burner comprising:a mixture nozzle which extends toward an interior of a furnace, and defines a mixture passage through which a mixture containing powdered solid fuel and gas for transferring said solid fuel flows, said mixture nozzle having a distal end port

[ What is claimed is:] [1.] A combustion burner comprising:a mixture nozzle which extends toward an interior of a furnace, and defines a mixture passage through which a mixture containing powdered solid fuel and gas for transferring said solid fuel flows, said mixture nozzle having a distal end portion extending to a distal end of said mixture nozzle, the distal end portion being flared so that an entire flow passage area of said mixture passage in the distal end portion increases progressively to the distal end in a direction of flow of said mixture;a flame stabilizer provided at the distal end portion of said mixture nozzle;a gas supply nozzle radially surrounding said mixture nozzle and defining between said gas supply nozzle and said mixture nozzle a gas passage through which combustion oxygen-containing gas flow toward said furnace; anda flow guide provided within said mixture nozzle at a position upstream of said flared portion of said mixture nozzle with respect to a flow of said mixture so as to make said mixture flow radial outwardly along an inner peripheral surface of said flared portion of said mixture nozzle.