| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas turbine combustor capable of stably burning low calory gas containing a large quantity of COsuch as blast furnace gas.SOLUTION: A burner structure in which gas fuel injection holes and air injection holes are alternately arranged in an inner peripheral swirler of a double-swirling burner constituted of the inner peripheral swirler and an outer peripheral swirler and gas injection holes are arranged in the outside outer peripheral swirler, is adopted as a basic configuration. Fuel injection holes for enhancing flame stability are provided at the radial direction inside of the inner peripheral swirler. Low calory gas can be stably burned by a mutual action of inner peripheral flame by the inner peripheral swirler and outer peripheral flame by the outer peripheral swirler. Especially, in the inner peripheral swirler, the gas injection holes and the air injection holes alternately arranged contribute to raising of a temperature of the inner peripheral flame for covering flame stability, and thus to enhancing of combustion stability. Further, by providing the fuel injection holes for enhancing flame stability, a flame temperature in a circulating gas region (flame stabilizing point) formed centrally in a radial direction of the burner, can be raised, and a gas turbine combustor capable of stably burning the low calory gas can be provided. |
