BUNDLE, HEAT EXCHANGER, SMOKE EXHAUST PROCESSING DEVICE, AND MANUFACTURING METHOD FOR BUNDLE

To provide a bundle, a heat exchanger, a smoke exhaust processing device, and a manufacturing method for the bundle that restrain an increase in manufacturing costs by applying optimal materials to heat transfer tubes.SOLUTION: A bundle comprises: an inlet header to which a heat medium is supplied; an outlet header from which the heat medium is discharged; and a plurality of heat transfer tubes connecting the inlet header and the outlet header, and in which fins are fixed to outer peripheral parts of element tubes. The plurality of heat transfer tubes comprises a first tube group arranged on the upstream side in the flow direction of exhaust gas, and a second tube group arranged on the downstream side of the first tube group in the flow direction of the exhaust gas. In the heat transfer tubes of the first tube group, the element tubes are formed of a material having higher corrosion resistance than that of the fins. In the heat transfer tubes of the second tube group, the fins are formed of a material having higher corrosion resistance than that of the element tubes.SELECTED DRAWING: Figure 1 【課題】バンドルおよび熱交換器並びに排煙処理装置、バンドルの製造方法において、伝熱管に対して最適な材料を適用することで製造コストの増加を抑制する。【解決手段】熱媒体が供給される入口ヘッダと、熱媒体が排出される出口ヘッダと、入口ヘッダと出口ヘッダを連結すると共に素管の外周部にフィンが固定される複数の伝熱管と、を備え、複数の伝熱管は、排ガスの流れ方向の上流側に配置される第１管群と、第１管群より排ガスの流れ方向の下流側に配置される第２管群とを有し、第１管群の伝熱管は、フィンより素管の方が耐食性の高い材料により形成され、第２管群の伝熱管は、素管よりフィンの方が耐食性の高い材料により形成される。【選択図】図１