Ways to Prevent High Temperature Corrosion and Wear of Boiler Water Wall

       Boiler spraying, thermal spraying, supersonic arc spraying, boiler heating surface anti-wear and anti-corrosion, boiler water wall anti-wear spray, deflector installation, deflector anti-wear, wear-resistant plate installation, longitude and latitude anti-wear, grille anti-wear, CFB boiler anti-wear technology, circulating fluidized bed boiler anti-wear technology, boiler anti-wear technology

The way to prevent the high temperature corrosion and wear of the boiler water wall Accidental tube burst will cause great economic losses. In order to reduce tube burst, the power plant has invested a lot of manpower and material resources to strengthen the monitoring and replacement of the water wall, but the monitoring has not achieved any substantial The effect of sex is to change the tube, which will greatly increase the production cost and maintenance cost. The only way is to prevent problems before they happen. After analyzing the causes of high temperature corrosion of the water wall, effective methods can be used to prevent them. The commonly used methods can be divided into two categories, namely non-surface protection methods and surface protection methods. Non-surface protection methods are: A. The use of low-oxygen combustion technology. B. Make the pulverized coal concentration in each combustion room as uniform as possible. C. Reasonable air distribution and enhanced turbulent mixing in the furnace. D. Control the appropriate fineness of pulverized coal. E. Avoid local overheating of the wall temperature of the heating surface. F. Spray air protective film near the wall. G. Add additives. H. Control reasonable furnace outlet smoke temperature. I. Use corrosion-resistant superalloys for coals that are prone to high-temperature corrosion. J. Adopt flue gas recirculation. K. The design and layout of the heating surface is reasonable to avoid the occurrence of high smoke temperature areas and high wall temperature areas. L. Add furnace lining protection to the corrosion-prone areas. What the non-surface protection method has in common is that it can reduce the corrosion of the water wall to a certain extent, but it cannot really prevent its corrosion. Moreover, some methods cannot be effectively implemented due to various reasons in actual operation, and even individual methods are still controversial, such as furnace lining protection, which not only affects the heat absorption capacity of the combustion chamber, but also complicates corrosion. Therefore, it is necessary to seek other surface protection methods with better effects. Covering the surface of the corroded component with a corrosion-resistant isolation layer is the most direct and effective anti-corrosion measure. It belongs to the surface protection method of high temperature corrosion. The internal environment of the boiler and the desulfurization device are prone to delamination during use, which is difficult to apply in practice. (2) Electroplating and hot infiltration plating: The coverage and bonding of the coating are good, but due to the size of the workpiece, the coating will also have weak links in the field tailor welding, reducing the performance. Re-embalming of existing facilities is not possible. (3) Thermal spraying: suitable for on-site operation, with a wide selection of coating materials and many combinations, it can provide a variety of performance coatings, additional protection for the unprotected parts of the existing facilities, and re-protection for the protected parts. Supersonic arc spraying technology utilizes the "Laval principle" in fluid mechanics, so that the speed of particles during spraying truly exceeds the speed of sound. Through the introduction of this technology, we have carried out bold equipment structural transformation and functional improvement, especially for the shortcomings of the spraying equipment, which are bulky, bulky, and unfavorable for on-site construction. The outstanding features achieved are strong on-site practicability, good spraying performance, and coating. The quality has improved significantly.