EXHAUST HEAT RECOVERY BOILER

摘要

PROBLEM TO BE SOLVED: To improve an efficiency and a responsiveness to a load variation of an exhaust heat recovery boiler without enlarging the exhaust heat recovery boiler. SOLUTION: A vapor generating heat exchanger of at least any of a re-heater 13, a super-heater 20 and an evaporator 27 is arranged in a passage of the combustion gas 4 of the exhaust heat recovery boiler 6. A re-heater 51 is provided which includes a catalyst combustion device having combustion catalysts 9, 16 and 23 in the front flow side of the heat exchanger and a gas-phase combustion device 27 disposed in the tail flow side thereof.