What is the purpose of an economizer in a steam system?

The purpose of an economizer in a steam system is to preheat boiler feedwater using waste heat from flue gases. This process enhances the overall efficiency of the boiler by recovering heat that would otherwise be lost in the exhaust. By raising the temperature of the feedwater before it enters the boiler, the economizer reduces the amount of fuel needed to reach the desired steam temperature and pressure.

This heat recovery system not only improves thermal efficiency but also contributes to reduced operational costs and lower emissions, making it an important component in modern steam systems. Utilizing waste heat effectively leads to a more sustainable operation, which is crucial for energy conservation in industrial settings.