Jfe Steel Corporation

Kuniaki Okada

Jun Ishii

Munehiro Ishioka

Hitoshi Oishi

Yoshiki Fujii

Tatsuya Shimada

Koichi Takashi

Yutaka Suzukawa

Takamitsu Kusada

A tubular combustion chamber including a tubular combustion chamber whose front-end is open; and, fuel-gas spraying nozzles and oxygen-containing-gas spraying nozzles, for spraying a fuel and an oxygen-containing-gas separately and individually, or for spraying a premixed gas; wherein respective orifices of the respective nozzles face toward an inner surface of the combustion chamber, so as to spray the fuel-gas and the oxygen-containing-gas in a neighborhood of a tangential direction of an inner circumferential wall of the combustion chamber; wherein the tubular flame burner is a multi-stage tubular burner that is unified in a body, by using a plurality of the tubular flame burners, and by connecting the front-end of the tubular flame burner with a smaller inner diameter of the combustion chamber into the rear-end of the tubular flame burner with a greater inner diameter of the combustion chamber.

Tubular flame burner and combustion control method

A tubular flame burner, a combustion method, and combustion controller, are disclosed. Here, the tubular flame burner comprises: a tubular combustion chamber whose h one end is open; fuel-spraying nozzles and oxygen-containing-gas spraying nozzles. The respective nozzle orifices are formed in the inner face of the combustion chamber so that each spraying direction is in a neighborhood of a tangential direction of the inner circumferential wall of the combustion chamber. And an ignition device is disposed at a position r/2 from the tube axis of the combustion chamber (r: the radius of the combustion chamber). The length of the combustion chamber can be adjusted, the tubular flame burner is a multi-stage burner formed of multiple tubular flame burners, and a gap between the inner tube and the outer tube serves as a gas-flow path. A combustion control method for the tubular flame burner is disclosed, wherein on/off of switching valves is controlled so that the spraying speed from each nozzle is maintained in a predetermined range corresponding to the combustion load.

Tubular flame burner and method for controlling combustion

Growing community of inventors

Hiroshima, Japan

Kuniaki Okada