HEAT EXCHANGER AND FLUE GAS TREATMENT EQUIPMENT

To improve the durability of a heat exchanger and flue gas treatment equipment by suppressing the occurrence of corrosion in heat transfer tubes.SOLUTION: The heat exchanger comprises: a first heat exchange unit having a first heat transfer tube arranged along the flowing direction of exhaust gas in an exhaust gas passage; a second heat exchange unit having a second heat transfer tube arranged along the flowing direction of the exhaust gas in the exhaust gas passage on the upstream side in the flowing direction of the exhaust gas, of the first heat exchange; a first supply line for supplying heat medium into the first heat transfer tube at its end on the downstream side in the flowing direction of the exhaust gas; and a second supply line for supplying the heat medium from the first heat transfer tube at its end on the upstream side in the flowing direction of the exhaust gas into the second heat transfer tube at its end on the upstream side in the flowing direction of the exhaust gas.SELECTED DRAWING: Figure 2 【課題】熱交換器および排煙処理装置において、伝熱管における腐食の発生を抑制することで耐久性の向上を図る。【解決手段】排ガス通路に排ガスの流れ方向に沿って配置される第１伝熱管を有する第１熱交換部と、第１熱交換部より排ガスの流れ方向の上流側の排ガス通路に排ガスの流れ方向に沿って配置される第２伝熱管を有する第２熱交換部と、第１伝熱管における排ガスの流れ方向における下流側の端部に熱媒体を供給する第１供給ラインと、第１伝熱管における排ガスの流れ方向における上流側の端部から第２伝熱管における排ガスの流れ方向における上流側の端部に熱媒体を供給する第２供給ラインと、を備える。【選択図】図２