Economizer is an energy-saving device that uses the waste heat of high-temperature flue gas at the tail of the boiler to preheat the feed water. It is usually made of carbon steel pipe (outer diameter 32-51 mm) into a serpentine tube structure. Some models will be equipped with fins or ribs to enhance the heat transfer effect.
An economizer is a part of a building’s cooling system that uses cool outdoor air to cool the building instead of operating the air conditioning compressor. An economizer is an add-on feature to an HVAC air handler that draws in outdoor air and mixes it with return air from indoors.
Economizer is a heat exchange device installed in the flue at the tail of the boiler to recover the waste heat of flue gas. It reduces the exhaust temperature by heating the boiler feed water, thereby improving thermal efficiency and saving fuel. Its core functions include energy saving and consumption reduction, replacing part of the evaporation heating surface, and protecting the drum equipment.
Function of Economizer
1. Absorb the heat of low-temperature flue gas, reduce the exhaust temperature, reduce exhaust loss, and save fuel.
2. Since the feed water is heated in the economizer before entering the drum, the heat absorption of the feed water on the heating surface is reduced, and the economizer can be used to replace part of the more expensive evaporation heating surface.
3. When the feed water temperature is increased, the wall temperature difference will be reduced when entering the drum, and the thermal stress will be reduced accordingly, extending the service life of the drum.