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    • 7. 发明专利
    • SUPERHEATER IN BOILER
    • JPH07280202A
    • 1995-10-27
    • JP8532794
    • 1994-04-01
    • EBARA CORPMITSUBISHI CHEM CORP
    • SHINZAN YOSHIKIKURIHARA KATSUYUKITSUKAMOTO KEISUKEIWASHITA TAKESHIKOBAYASHI MASAYUKITAKI YOSHIHIRO
    • F23J3/00F22B1/18
    • PURPOSE:To prevent effectively the corrosion of superheater tubes of a superheater by a method wherein the surfaces of the respective superheater tubes of a superheater in a boiler for an incinerator for waste disposal or the surfaces of the superheater tubes of a superheater in a fluidized bed boiler, which is a boiler for waste disposal, are covered with a corrosion-resistant metal flame spray coating layer. CONSTITUTION:A combustion gas evolved in an incinerator for waste disposal superheats a group of superheater tubes 1 and generates superheated steam. Each of the superheater tubes 1 has a main body made of a steel tube, and a corrosion- resistant metal flame spray coating layer is formed on its entire surface. It is preferable to use metal capable of forming a highly hard flame spray coating layer as corrosion- resistant metal, and a nickel-chromium-based flame spray coating material containing nickel as a main component may ordinarily be employed. Also, a fluidized bed boiler 10 has a fluidized bed 11 formed with a fluidized medium, and an evaporator tube 12 of an evaporator and a superheater tube 13 of a superheater are set in the fluidized bed 11. Flame spray coating of corrosion-resistant metal is also applied onto the superheater tube 13 and the evaporator tube 12 in the same thickness. Further, a corrosion-resistant metal flame spray coating layer is applicable to superheater tubes of a convection superheater.