Corrosion Resistant Anti Wear Plate CFB Boiler Plate With High Thermal Conductivity And Optimized Flow Field

Circulating fluidized bed boilers are widely used in industrial production due to their ability to minimize pollution during coal burning processes, reduce emissions, and meet environmental standards. However, during actual operation, CFB boilers experience wear that can lead to safety accidents.

The water wall serves as the main heating surface of CFB boilers and is particularly susceptible to wear and corrosion. These issues are unavoidable during boiler operation. When water wall wear reaches critical levels, pipe explosions can occur, posing serious threats to enterprise safety. Therefore, studying and implementing effective anti-wear measures for water walls is crucial for businesses using circulating fluidized bed boilers.

Analysis of wear patterns across several circulating fluidized bed boilers reveals that water wall wear primarily results from continuous erosion and cutting by high-speed moving material particles during combustion. Due to the inherent characteristics of CFB boilers, water wall wear cannot be completely avoided, but it can be fundamentally addressed through advanced anti-wear technologies.

The water wall wear problem has existed for many years, leading to the development of various anti-wear technologies. Market solutions include metal spray anti-wear, anti-wear beams, and grille anti-wear technology, with varying levels of effectiveness.

Water-cooled wall grating anti-wear technology has been introduced to major enterprises using circulating fluidized bed boilers and has been practically applied in over 300 CFB boilers domestically and internationally. The anti-wear effectiveness has gained market recognition, establishing it as the most mainstream anti-wear technology available.

The earliest applications of grille anti-wear technology have now exceeded 7 years of operation without any tube explosion events caused by water wall wear, demonstrating proven effectiveness through practical testing.

Grille anti-wear technology represents a new type of active anti-wear solution with optimization and efficiency enhancement functions. To meet the demand for optimal anti-wear efficiency in CFB boilers, this technology achieves improvements through several key mechanisms:

CFB boiler wear problems primarily result from cutting and collision by high-speed smoke flow on heating surfaces. Grille anti-wear technology reduces smoke flow velocity on walls by mounting alloy anti-wear plates horizontally and vertically, thereby minimizing heating surface wear. The alloy anti-wear plates feature high thermal conductivity (exceeding 30 under normal combustion conditions, slightly higher than water walls) and high surface emissivity, enabling effective enhancement of both convection and radiation heat transfer while improving CFB boiler heat transfer efficiency.

The technology optimizes wall flow fields on heating surfaces, creating more uniform heat load distribution within the furnace. This results in more uniform heat transfer, reduced heat loss during transfer processes, and improved CFB boiler thermal efficiency. Grille anti-wear technology can replace traditional methods (such as castables and anti-wear beams), releasing heating surfaces previously covered by materials with poor thermal conductivity and effectively increasing the available heating surface area.

Theoretical analysis indicates that grille anti-wear technology can improve and enhance CFB boiler optimization and efficiency across three key dimensions. In practical engineering applications, third-party authority testing conducted before and after grille anti-wear transformation of a supercritical CFB boiler unit confirmed significant improvements.