In view of the serious wear and corrosion of the induced draft fan impeller, the most effective treatment is to increase the dust removal and desulfurization of the boiler coal, which can greatly reduce the dust and sulfur dioxide entering the induced draft fan. It is also important to reduce the moisture content in the induced draft fan. For this purpose, the smoke removing nozzle can be modified to reduce the corrosion of the impeller and the blade by reducing the moisture. Repair some parts of the impeller that are in contact with dust and are corrosive, and replace them with anti-corrosion and wear-resistant materials. At the same time, it is necessary to strengthen the maintenance of the internal equipment of the induced draft fan to prevent some minor faults from causing major accidents. The three-leaf Roots vacuum pump is analyzed by analyzing the cause of the fault of the moving leaf jam. The main measures to solve this fault are: 1) Strengthen the cleaning of the impeller and the hub. The dry screw vacuum pump controls the amount of dust on the impeller to a safe range. In order to not disturb the normal continuous operation of the induced draft fan, steam can be used for purging. Efforts are made to increase the degree of combustion of the fuel in the boiler, which reduces solids in the dust and protects the blades from wear. 2) Properly increase the gap between the blade and the hub to prevent dust from clogging the gap in a short time. Increase the maintenance of the blade and the hub, you can apply a proper amount of lubricating oil to the transmission mechanism of the moving blade, which can reduce the wear of the moving blade, and avoid the friction of the moving blade is too large to adjust the moving blade when there is no dust. Dispersants can be divided into low molecular dispersants and high molecular dispersants. The role of dispersants is to use wetting dispersants to reduce the time and energy needed to complete the dispersion process, stabilize the dispersed pigment dispersions, modify the surface properties of pigment particles, and adjust the movement of pigment particles. The commonly used dispersant is pigment dispersant, which reduces the interfacial tension between pigments or fillers and carriers. It is suitable for all coating systems (regardless of solvent-free coatings) and does not affect the application period of two-component systems. Efka dispersant is used for high - quality solvent - based colorants of inorganic and organic pigments against flocculation. Used for dispersing inorganic and organic pigments in high quality solvent - based colorings. Anti float color, flower, phase separation, delay PS material floating time. Dispersing Agent,High molecular dispersant, low molecular dispersant Jiangyin Thousands Chemicals Co. , https://www.jywqhxcomposite.com