| 摘要 |
PROBLEM TO BE SOLVED: To suppress discharge of unburned constituents and reduce NOx even if air and nitrogen are supplied to gasified gas in an operation load range of a gas turbine. SOLUTION: When the gasified gas 15 is jetted to a combustion chamber 8a from a fuel jet 24a, and combustion air 9a and nitrogen 13 in an air passage 9b are jetted to the combustion chamber 8a from a fluid swirling passage 24c, nitrogen is jetted out from a nitrogen jet 27a and a nitrogen jet 27b of a nitrogen jet nozzle 27 into the passage 9b, and the oxygen concentration in the air that passes through an air swirler 24 is raised, thereby, in a low loading condition, rendering the temperature of a flame 20b to be more than a given value and suppressing the unburned constituent concentration of the discharge gas. On the other hand, in a high loading condition, the temperature of the entire flame 20b can be lowered by mixing the nitrogen 13 supplied from a combustion air port 26a with combustion gas and thus generation of NOx is suppressed.
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