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OwnerKazunari Itai, Akihiro Takeya +3inventors
InventorsKazunari Itai, Akihiro Takeya, Yoshinobu Sochi, Michio Tanabe, Yoichi Matsubara
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It is an object to reduce the burden of a welding operation in producing a boiler waterwall panel and to reduce the burden of maintaining a furnace housing using the boiler waterwall panels thereby to improve the operating rate of the boiler. In a boiler waterwall panel 80, a panel body 70 with water passages is constituted by a plurality of metal seamless finned single tubes 60 as constituent units integrally produced by a hot extrusion method, etc., and joined by welding tip ends of fin portions 62. On at least one surface side of the panel body 70, fusion-bonded coating 81 for frame-like edge portions and fusion-bonded coating 82 for inner region, of a corrosion resistant alloy are formed. The finned single tube 60 has a single tubular portion 61 for a cooling water passage and a pair of fin portions 62 extending in the tube axial direction at peripheral opposite sides of the tube, and the external surface of the transition portion 63 is formed into a concave surface having a curvature radius of 3 to 6 mm.
A boiler waterwall panel comprising a metal panel member with water passages as a panel body equipped with a plurality of rows of tubular portions to be served as cooling water passages, web portions connecting the rows of tubular portions, and a pair of fin portions located at outsides of outermost tubular portions and extending in a tubular axial direction, at least one surface of the panel body being covered with a fusion-bonded coating of a corrosion resistant alloy,
A boiler waterwall panel comprising a metal panel member with water passages as a panel body equipped with a plurality of rows of tubular portions to be served as cooling water passages, web portions connecting the rows of tubular portions, and a pair of fin portions located at outsides of outermost tubular portions and extending in a tubular axial direction, at least one surface of the panel body being covered with a fusion-bonded coating of a corrosion resistant alloy,
A boiler waterwall panel comprising a metal panel member with water passages as a panel body equipped with a plurality of rows of tubular portions to be served as cooling water passages, web portions connecting the rows of tubular portions, and a pair of fin portions located at outsides of outermost tubular portions and extending in a tubular axial direction, at least one surface of the panel body being covered with a fusion-bonded coating of a corrosion resistant alloy,
Dependencies are inferred from the claim text.