How to solve the wear problem of the water wall in CFB boilers

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　　As there is an increasing emphasis in China on efficient, environmentally friendly, and clean combustion technologies, CFB boilers have been widely used and promoted in the country. CFB boilers, also known as circulating fluidized bed boilers, are characterized by their high efficiency, environmental friendliness, and energy savings. They are suitable for using coal as fuel, and they are widely used in China’s thermal power industry. 　　With the widespread use of CFB boilers in the thermal power industry, problems arising from their actual operation have gradually become apparent. In particular, the wear of the water wall in CFB boilers is a significant issue, even becoming one of the most troublesome problems in power plants. The wear of water wall tubes not only causes problems for power plants but also severely limits their broader application and adoption. 　　If the wear problem of the water wall in CFB boilers can be completely resolved through technology, it will not only solve the problems faced by power plants but also help to promote the further use of CFB boilers. The initial anti-wear technologies for the water wall of CFB boilers were rather passive; for example, many power plants used ultrasonic arc spraying to apply ceramic-based non-metallic materials to the areas that were severely worn. Most domestic CFB boilers use a spraying method that combines subsonic flame spraying, conventional arc spraying, supersonic arc spraying, and subsonic spraying. The anti-wear effect of this approach is fairly good, but the wear protection lasts for only a short period; it is necessary to re-spray the water wall every year, resulting in high costs associated with wear prevention. 　　Before the development of grid anti-wear technologies, no existing method could actively prevent wear and completely solve the problem of wear on the water wall of CFB boilers. The advent of grid anti-wear technology has completely revolutionized the anti-wear techniques for the water wall in CFB boilers. It has evolved from the previous passive anti-wear methods, which were ineffective, to active anti-wear technologies that provide thorough protection over a longer period of time with lower costs. Having been tested in various power plants, it has been proven that grid anti-wear technology provides effective wear protection over an extended period of time; it is indeed a reliable anti-wear solution for water wall systems. 　　At present, the grid anti-wear technology has gradually replaced other anti-wear technologies, becoming a reliable, safe, and highly effective anti-wear solution for the water wall of CFB boilers.