WASTE HEAT RECOVERY DEVICE, GAS TURBINE PLANT PROVIDED WITH SAME, AND WASTE HEAT RECOVERY METHOD

摘要

The present invention comprises: a low-boiling-point-medium Rankine cycle (150) wherein a low-boiling-point medium (LM) circulates so as to be repeatedly condensed and evaporated; a heated water line (171) that guides heated liquid water from a waste heat recovery boiler (110) where the liquid water is heated to the low-boiling-point-medium Rankine cycle (150); and a water recovery line (178) that returns to the waste heat recovery boiler (110) the water that passes through the low-boiling-point-medium Rankine cycle (150). The low-boiling-point-medium Rankine cycle (150) has a heating apparatus (151) that heats the low-boiling-point medium (LM) by performing a heat exchange between the liquid low-boiling-point medium (LM) and the liquid water that has passed through the heated water line (171).