The methods used for the treatment of domestic waste and industrial waste are incineration, landfill, and recycling. In the incineration system, there are primary fans, secondary fans, cooling fans, and induced draft fans. Due to the different calorific values of waste types, the smoke after incineration The corrosive components of the gas are also different, which requires high temperature resistance and corrosion resistance for the impeller and material of the fan. Usually, 316L and duplex steel 2205 and other alloy materials are used.