EXHAUST HEAT RECOVERY BOILER AND EXHAUST HEAT RECOVERY METHOD

PROBLEM TO BE SOLVED: To provide an exhaust heat recovery boiler and an exhaust heat recovery method that can improve heat transfer efficiency in exhaust heat recovery.SOLUTION: An exhaust heat recovery boiler according to an embodiment comprises an exhaust gas flow passage, a flow passage division wall, and a first heat transfer pipe. The exhaust gas flow passage passes exhaust gas from an exhaust gas inlet to an exhaust gas outlet. The flow passage division wall divides the exhaust gas flow passage into a plurality of divided flow passages in a direction orthogonal to a flow direction of the exhaust gas. The first heat transfer pipe leads from a first divided flow passage out of the plurality of divided flow passages to a second divided flow passage out of the plurality of divided flow passages, and passes a heat medium from the side of the first divided flow passage toward the side of the second divided flow passage.SELECTED DRAWING: Figure 1 【課題】排熱回収における伝熱効率を向上させることができる排熱回収ボイラおよび排熱回収方法を提供すること。【解決手段】本実施形態による排熱回収ボイラは、排ガス流路と、流路分割壁と、第１伝熱管とを備える。排ガス流路は、排ガス入口から排ガス出口へと排ガスを流す。流路分割壁は、排ガスの流動方向に直交する方向において排ガス流路を複数の分割流路に分割する。第１伝熱管は、複数の分割流路のうちの第１分割流路から、複数の分割流路のうちの第２分割流路へと至り、第１分割流路側から第２分割流路側に向かって熱媒体を流す。【選択図】図１