In a reheating furnace, major heat losses were found to be in the flue gases leaving the furnaces at very high temperatures.
Recuperators are waste heat recovery equipments that use the energy in hot waste flue gases to preheat combustion air. The
main advantages of using Recuperator for preheating the air for combustion are as under:
It is able to reduce the consumption of pulverized coal up to 25% as compared to coal air combustion
The heat recovered from the flue gases by combustion air is returned to the furnace thus reducing pulverized coal
requirement.