| 摘要 |
PURPOSE:To permit stabilized operation covering a load over a wide range by a method wherein a premixing combustion system and a normal catalyst combustion system are combined and the fluctuation of the load, including the starting of a turbine, is coped by premixing combustion. CONSTITUTION:A combustion tube 2 is constituted of a catalyst combustion chamber 2b and a premixing combustion chamber 2d while the premixing combustion chamber 2d is arranged around a catalyst 9, loaded at a position near the downstream end of the catalyst combustion chamber 2b, and is provided with an airflow inlet port 2c and fuel nozzles 3b. The premixing combustion chamber 2d is communicated with the combustion chamber 2b at the downstream end 2e of the catalyst combustion chamber 2b. In the title combustor 11, the supplying amount of fuel from the fuel nozzles 3b is suppressed into low to prevent deterioration due to the temperature rise of the catalyst under a condition that a flow speed is lower or the concentration of fuel becomes higher than the designing conditions of the catalyst 9 and, on the contrary, the supplying amount of fuel through the fuel nozzles 3b is increased to prevent the temperature reduction of the catalyst under a condition that the flow speed becomes higher or the concentration of the fuel becomes lower than the designing conditions of the catalyst 9.
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