What is the role of an economizer in a boiler system?

The role of an economizer in a boiler system is to recover waste heat from the flue gases, which can then be used to pre-heat the feed water before it enters the boiler. This process increases the overall efficiency of the boiler system because it reduces the energy required to bring the feed water up to the necessary temperature for steam generation. By utilizing heat that would otherwise be lost, economizers improve energy conservation and can lead to significant reductions in fuel consumption and operating costs.

In the context of a boiler system, the economizer plays a crucial role in enhancing performance and sustainability. Pre-heating the feed water helps reduce the thermal shock on the boiler tubes, allows for more efficient combustion, and enhances the overall thermal efficiency of the system.