Heating tube for boilers and method of manufacturing the same
    1.
    发明授权
    Heating tube for boilers and method of manufacturing the same 有权
    锅炉加热管及其制造方法

    公开(公告)号:US6082444A

    公开(公告)日:2000-07-04

    申请号:US147154

    申请日:1998-10-20

    摘要: In order to control the precipitation and formation of a deposition produced in an inner face portion of a heat transmitting tube for a boiler due to a boiler water and the formation of an oxide scale of a tube material due to overheated steam, there is provided a heat transmitting tube for a boiler provided with a porous sprayed coating. The porous sprayed coating is formed by using a metal.multidot.alloy having excellent high temperature oxidation resistance and corrosion resistance at high temperature as compared with a material of the heat transmitting tube onto an outer heat receiving surface for contacting a combustion gas, and optionally an oxide ceramic, and optionally an oxide cermet. Solid inorganic sintered fin particles are penetrated and filled in opening pores of the porous sprayed coating and form a heat shielding layer on the surface of the porous sprayed coating. The solid inorganic sintered fine particles are solidified at high melting point to produce a heat shielding function to thereby prevent excessive heat flow to the heat transmitting tube.

    摘要翻译: PCT No.PCT / JP97 / 02898 Sec。 371日期:1998年10月20日 102(e)日期1998年10月20日PCT 1997年8月20日PCT公布。 第WO98 / 37253号公报 日期1998年8月27日为了控制由锅炉水引起的锅炉传热管的内表面部分产生的析出和形成,以及由于过热蒸汽形成管材的氧化皮 提供了一种设置有多孔喷涂层的锅炉用传热管。 多孔喷涂涂层是通过使用具有优异的高温抗氧化性和耐高温腐蚀性的金属合金,与传热管的材料相比,用于接触燃烧气体的外部受热表面和任选的氧化物陶瓷, 和任选的氧化物金属陶瓷。 固体无机烧结翅片颗粒穿透并填充在多孔喷涂涂层的开孔中,并在多孔喷涂涂层的表面上形成隔热层。 固体无机烧结微粒在高熔点下固化,产生热屏蔽功能,从而防止热传递管过热。