Boiler economizer is a heat exchanger installed on the flue gas stack of a boiler. Its primary function is to capture and utilize heat from the flue gases that would otherwise be wasted. This process enhances the overall energy efficiency of the boiler system.
The economizer operates by transferring heat from the hot flue gases to the incoming feedwater. This preheats the feedwater, reducing the energy required to bring the water to the desired temperature within the boiler.