What is the function of the economizer in a CFB system?

The economizer in a circulating fluidized bed (CFB) system serves the essential function of recovering heat from the flue gases before they are released into the environment. By capturing this heat, the economizer preheats the feedwater entering the boiler, which increases the overall efficiency of the system.

This heat recovery is crucial as it minimizes energy waste and helps to enhance the thermal efficiency of the boiler. The more heat that can be recovered, the less fuel is needed to maintain the desired steam production and thermal output, translating to lower operational costs and reduced emissions.

The operation of an economizer is particularly important in CFB systems, where maintaining optimal combustion conditions and maximizing energy efficiency is critical for performance and environmental compliance.