What is the function of a boiler economizer?

The function of a boiler economizer is to recover heat from flue gases that are otherwise wasted and use that heat to preheat the boiler feedwater before it enters the boiler. This process improves the overall efficiency of the boiler system because it reduces the amount of fuel required to heat the water to the desired temperature, resulting in lower energy costs and reduced emissions.

By utilizing the waste heat from the flue gases, the economizer helps to maximize energy use within the system. It is an essential component in many industrial and commercial boiler systems, as it enables operators to increase thermal efficiency and improve the sustainability of the operation. This leads to better performance of the boiler and can extend its lifespan due to reduced thermal stress and lower fuel consumption.