| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot air stove waste heat recovering equipment for a blast furnace, which is capable of raising the temperature of feed air to the blast furnace by raising the temperature of a heating medium after the heat recovery by using a blast furnace gas, which has low availability and is conventionally released as a residual gas, to elevate the pre-heating temperature of each of combustion air and a fuel gas without using fuel such as COG having high availability or LPG or LNG as an expensive purchased gas. SOLUTION: In the hot are stove waste heat recovering equipment for the blast furnace, in which the heat of the waste combustion gas of the hot air stove is recovered and the combustion air and the combustion gas in the hot air stove is preheated with the recovered heat, a heater 13 using the blast furnace gas, which has low availability and is conventionally released as the residual gas, as fuel is arranged between a waste combustion gas heat exchanger 7 in heat receiving side, and a combustion air heat exchanger 9 and a fuel gas heat exchange 11 in the heat releasing side, and the heating medium after receiving the heat in the waste combustion gas heat exchanger 7 is introduced into the heater 13 to be heated, and after that, introduced into the combustion air heat exchanger 9 and the fuel gas heat exchanger 11.
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