RECOVERING METHOD FOR WASTE HEAT OF CUPOLA

PURPOSE:To improve a utilizing efficiency of waste gas energy by burning CO in waste gas to be discharged from a cupola, introducing the gas into a heat exchanger, and driving a refrigerator with vapor due to waste heat of the waste gas to cool to dehumidify blown air of the cupola. CONSTITUTION:Waste gas to be discharged from a cupola 1 is introduced into a combustion chamber 2 to burn CO in the gas. The gas is also introduced into a heat exchanger 4 to heat blown air to the cupola 1. Further, the gas is introduced into a waste heat boiler 5 to recover the waste heat of the gas as vapor, and then a refrigerator 10 is driven with the vapor as a driving heat source. On the other hand, refrigerant having cold to be obtained by the refrigerator 10 is introduced into an air cooler 11 to cool to dehumidify blown air. The dehumidified air is introduced into the exchanger 4. Thus, the waste heat of the cupola 1 is effectively utilized to heat the air without inputting energy from the exterior and to cool to dehumidify it.