EXHAUST HEAT RECOVERY BOILER

To reduce an amount of drain water discharged to the outside of an exhaust heat recovery boiler to reduce labor and costs required for neutralization treatment.SOLUTION: An exhaust heat recovery boiler 1 includes: a boiler body 2 defining an internal space S which can store drain water W on a bottom surface 2b; an introduction port 4 which introduces exhaust gas into the boiler body 2; a heat exchanger 3 which is provided within the boiler body 2 and through which a heat medium for conducting heat exchange with the exhaust gas flows; an exhaust port 5 which is connected to a portion in the boiler body 2 located above the bottom surface 2b and exhausts the exhaust gas from an interior of the boiler body 2; and a drain water discharge port 11 which is provided at a height position in the boiler body 2 which is located above the bottom surface 2b and below the exhaust port 5 and discharges the drain water W stored on the bottom surface 2b.SELECTED DRAWING: Figure 1 【課題】ドレン水の排熱回収ボイラー外への排出量を抑え、中和処理に要する手間やコストを抑える。【解決手段】排熱回収ボイラー１は、底面２ｂ上にドレン水Ｗを貯留可能な内部空間Ｓを区画形成するボイラー本体２と、ボイラー本体２内に排気ガスを導入する導入口４と、ボイラー本体２内に設けられ、排気ガスと熱交換する熱媒が流れる熱交換器３と、ボイラー本体２における底面２ｂよりも上方に接続されてボイラー本体２内から排気ガスを排出する排出口５と、ボイラー本体２における底面２ｂよりも上方かつ排出口５よりも下方の高さ位置に設けられて、底面２ｂ上に貯留されたドレン水Ｗを排出するドレン水排出口１１と、を備える。【選択図】図１