Where is the economizer typically located in relation to other components of a boiler?

The economizer is typically positioned after the superheaters and reheaters within the boiler system. Its primary function is to improve overall energy efficiency by preheating the feedwater before it enters the boiler.

In this configuration, the economizer takes advantage of the residual heat from the flue gases that have already passed through the combustion process and heated the steam. By positioning it after the superheaters and reheater, the economizer utilizes the remaining heat from the exhaust gases, which enhances the thermal efficiency of the entire system. This process allows the economizer to increase the temperature of the feedwater, thereby reducing the amount of fuel required to achieve the desired steam generation temperature and pressure.

This positioning is essential because if the economizer were placed before the superheaters, it would not be able to effectively absorb the high-temperature flue gas heat, which is crucial for maximizing energy recovery. Therefore, placing the economizer after these components ensures optimal performance and energy savings in the boiler system.