Regeneration fans are core auxiliary machines in industrial flue gas treatment systems (such as desulfurization, denitrification, and activated carbon adsorption regeneration systems). Their main function is to transport high-temperature, dusty, or corrosive gases, returning the desulfurizing agent, catalyst, or adsorbent from the desulfurization tower/denitrification reactor to the system for recycling. They also serve a dual purpose of pressurization and material circulation.