Heat exchangers with floating headers

A heat exchanger is comprised of two heat exchanger sections, at least one of which is provided with a floating header to accommodate differential thermal expansion. The two heat exchanger sections are enclosed by an inner shell wall, and an external connecting passage is provided outside the inner shell wall, through which one of the fluids flows between the two heat exchanger sections. The external connecting passage is enclosed by an outer shell. The inner wall is provided with openings which communicate with the external connecting passage. The openings may be in the form of a substantially continuous gap or discrete openings. Specific examples of heat exchangers with this construction include a steam generator, a steam generator and combined catalytic converter, and a water gas shift reactor. 种热交换器包括两个热交换器区段，至少个所述热交换器区段设置有浮动集管以适应不同的热膨胀。所述两个热交换器区段由内壳体壁围封，并且外部连接通道提供在所述内壳体壁外部，流体中的者经由所述外部连接通道在所述两个热交换器区段之间流动。所述外部连接通道由外壳体围封。所述内壁设置有与所述外部连接通道连通的开口。所述开口可呈基本上连续的间隙或离散开口的形式。具有这种构造的热交换器的具体实例包含蒸汽发生器、蒸汽发生器与组合的催化转化器以及水气