The anti-wear maintenance process of thermal spraying of water-cooled wall tubes ensures the normal operation of CFB boilers

       Keywords on this page: boiler spraying, thermal spraying, supersonic arc spraying, boiler heating surface anti-wear and anti-corrosion, boiler water-cooled wall anti-wear spray, deflector anti-wear, anti-wear plate installation, longitude and latitude anti-wear, grille anti-wear, Anti-wear technology of CFB boiler, anti-wear technology of circulating fluidized bed boiler, anti-corrosion and anti-corrosion of heating surface of pulverized coal boiler, thermal spraying of boiler

The anti-wear maintenance process of thermal spraying of water-cooled wall tubes ensures the normal operation of CFB boilers. The circulating fluidized bed CFB boilers have the advantages of particularly good fuel adaptability, high combustion efficiency, low gas pollutant emissions, large load adjustment range and comprehensive utilization of ash and slag. , has developed by leaps and bounds in my country in the past 20 years. At present, there are nearly 300 circulating fluidized boilers with an evaporation capacity of more than 10t/t in service in my country, more than 2,000 of them with an evaporation capacity of more than 35t/h, and nearly 260 of them with an evaporation capacity of 220-480t/h; large-scale circulation boilers with an evaporation capacity of 1025t/h 20 fluidized boilers have been put into operation and more than 30 are under construction. In addition, my country's 600MW supercritical CFB boiler development project is progressing smoothly, and the total number of circulating fluidized bed boilers in my country ranks first in the world in terms of total evaporation. With the rapid development of circulating fluidized bed boilers, rich experience in design, manufacture, installation, commissioning and operation and maintenance has been accumulated, but some problems have also been exposed. During the operation of the CFB boiler unit, the shutdown of the unit due to the wear of metal materials and the falling off of refractory and wear-resistant materials accounts for 40% of the shutdown times. Abrasion, cracking, falling off; slag leakage and wear of the air cap; combustion flameout, slagging and explosion, etc. The existence of these problems affects the continuous, safe and economical operation of CFB boilers, and also brings about the problems of heavy maintenance workload and high operating costs. The combustion method of the CFB boiler determines that the wear of the heating surface of the water wall is more serious than that of the pulverized coal boiler. The specific wear degree is related to factors such as furnace type, burning coal type, and combustion adjustment. People try to effectively control wear and tear in a reasonable way to improve the safety, stability and economy of CFB boiler operation. In recent years, thermal spraying technology has developed rapidly in my country, and anti-thermal corrosion and anti-wear spraying are widely used in various industries. The anti-wear maintenance process of thermally spraying the water-cooled wall tube directly in the furnace is adopted, the construction is flexible, time-saving and convenient, and the cost is small.