The booster fan is one of the important equipment in the desulfurization system. It is generally installed on the high temperature side of the original flue gas behind the FGD inlet baffle and before the GGH. It is mainly used to overcome the pressure loss when the flue gas passes through the desulfurization tower. It is generally equipped with a booster fan to ensure the normal operation of the entire desulfurization system. In the desulfurization process, the flue gas passes through the desulfurization equipment, and after the pressure is increased by the booster fan, it reacts with the spray (usually limestone slurry or calcium oxide slurry, etc.) to remove harmful substances such as SO2 in the flue gas. The desulfurization booster fan has the characteristics of high pressure and large air volume to meet the pressure requirements of the desulfurization system for gas and liquid. It usually uses a centrifugal booster fan, which can provide high-pressure airflow, and has good stability and reliability. When selecting a desulfurization booster fan, it is necessary to consider the actual process requirements of the desulfurization system, including parameters such as desulfurization temperature, gas flow rate, and required booster pressure. In addition, factors such as fan energy consumption, noise, and corrosion resistance need to be considered to ensure the selection of a suitable desulfurization booster fan to meet the system requirements.