Blast furnace gas burns waste heat recovery device

The utility model provides a blast furnace gas burns waste heat recovery device, including the combustion furnace, the air inlet of combustion furnace links to each other with blast furnace gas pipeline and synthetic gas pipeline be equipped with the heat exchanger on the blast furnace gas pipeline, the high temperature exhaust port management of combustion furnace is said and is linked to each other with steam superheater, steam superheater's gas outlet links to each other with exhaust -heat boiler, exhaust -heat boiler's high temperature gas outlet management way links to each other with medium temperature air heater, soft water heater and low temperature air heater in proper order, by the hot -air that low temperature air heater drew forth is delivered to the chimney through the draught fan and is emptyyed after the spray thrower cooling is removed dust. The utility model discloses a cascade utilization of energy has reduced flue gas - air heat transfer system, flue gas - coal gas heat transfer system's heat transfer loss, has improved the availability of blast furnace gas waste heat, the superheated steam that supply follow -up plant use is produced through blast furnace gas, simultaneously further reduce exhaust gas temperature, retrieved to bigger degree high kiln gas waste heat, had better economic benefits.