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热词
    • 6. 发明授权
    • Method of manufacturing heat exchangers
    • 制造热交换器的方法
    • US4577380A
    • 1986-03-25
    • US671494
    • 1984-11-14
    • Donald F. Warner
    • Donald F. Warner
    • F28D21/00F28F9/013F28F9/14F28F9/26F28F19/04B21D53/08B23P15/26B29C51/00F28F9/04
    • F28F19/04F28D21/001F28F9/0131F28F9/14F28F9/26Y10S29/025Y10S29/035Y10T29/49373Y10T29/53113
    • A water-condensing heat exchanger recovers heat from a hot flue gas, subjecting tubes of the heat exchanger to substantial thermal expansion and contraction, and corrosive constituents in the flue gas require that metal tube sheets be thoroughly insulated from the flue gas during operation in a water-condensing mode. The heat exchanger is constructed by heat-forming edge portions of holes in plastic sheets through holes in tube sheets, temporarily plugging the plastic-lined holes to limit diametrical reduction, and entering tubes through the plastic-lined holes sufficiently shortly after unplugging the holes that further diametrical reduction of the holes causes them to grip and fixedly locate the tubes relative to the tube sheets. The method of manufacture also concerns providing a fluroplastic coating, e.g., polytetrafluoroethylene, on the interior elements of the heat exchanger to inhibit corrosion thereof; such coatings are hydrophobic thus allowing falling condensate to be washed away easily.
    • 冷凝热交换器从热烟道气中回收热量,使热交换器的管子显着地热膨胀和收缩,并且烟道气中的腐蚀性成分要求金属管板在操作期间与烟道气完全绝缘 水凝模式。 热交换器是通过在塑料板上的孔的边缘部分通过管板中的孔热成形来构造的,暂时堵塞塑料衬里的孔以限制直径减小,并且在拔下孔之后足够短的时间内将管穿过塑料衬里的孔 孔的进一步直径减小使得它们相对于管板夹持并固定管。 制造方法还涉及在热交换器的内部元件上提供氟树脂涂层,例如聚四氟乙烯以抑制其腐蚀; 这样的涂层是疏水的,从而容易使待冷凝物下降。