COOLING WALL STRUCTURE OF STEAM-COOLED COMBUSTOR

Japanese Patent JP3202636

B2

PROBLEM TO BE SOLVED: To lower NOx by brazing a thin plate having high temperature strength on a wall surface exposed to combustion gas and the groove arranging surface of one plate in which a plurality of cooling steam channel grooves is arranged, and communicating the end parts of respective channel grooves with a cooling steam supply manifold or a cooling steam recovering manifold.
SOLUTION: In a gas turbine combustor by which the wall surface of a combustor, which is exposed to high temperature combustion gas is cooled by steam, a plurality of cooling steam channel grooves 2 is arranged in one plate surface 1, and a thin plate 3 having high temperature strength is brazed on a surface in which the channel grooves 2 are arranged. Then, both end parts of the channel grooves 2 are so arranged that one is communicated with a cooling steam supply manifold 4 and the other is communicated with a cooling steam recovering manifold 5. The plate surface 1 and the thin plate 3 forming this cooling wall structure are not especially restricted, however Hastelloy X and Tomylloy (registered trademarks) which are excellent in high temperature strength are preferably employed, and the thickness of the plate surface 1 is set to 0.3-5.0mm and the thickness of the thin plate 3 is set to 0.8-1.6mm.

Igarashi Kira
Akio Ikoshi
Kouichi Akagi
Mitsuru Inada

JP2770797A

August 27, 2001

February 12, 1997

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Tohoku Electric Power Co., Inc.
MITSUBISHI HEAVY INDUSTRIES,LTD.

F02C7/141; F02C7/18; F23M5/08; F23R3/00; (IPC1-7): F02C7/18

JP8338633A
JP727335A
JP6211131A
JP8270950A
JP8261463A

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