The Comb plate is an essential component in power plant boilers that plays a critical role in the boiler’s operation. Typically installed in the final stage of the boiler’s reheater, the design of the Comb plate aims to improve the boiler’s thermal efficiency and operational safety. Here is a detailed introduction to the Comb plates used in power plant boilers:

1. Structural Features: The design of the Comb plate usually incorporates a series of parallel toothed structures, resembling the teeth of a comb, hence its name. This design helps enhance heat exchange efficiency by increasing the surface area for heat exchange and aiding in the uniform distribution of the fluid, thereby improving the effectiveness of heat transfer.

2. Functional Role: The primary function of the Comb plate is to act as a partition within the boiler, guiding the flue gas and steam to undergo effective heat exchange inside the boiler. Furthermore, the Comb plate prevents the fly ash and particulate matter in the flue gas from directly contacting the boiler’s heat exchange tubes, reducing wear and corrosion, and extending the boiler’s lifespan.

3. Material Selection: The material choice for the Comb plate is crucial for its performance and durability. Typically, Comb plates are made from materials that can withstand high temperatures and corrosive environments, such as stainless steel, to ensure long-term stable operation under high-temperature and high-pressure conditions.

4. Installation and Maintenance: The installation of the Comb plate requires precise alignment and securing to ensure it is in the correct position within the boiler. During boiler maintenance and inspection, the Comb plate is a component that requires careful attention. Regular checks and replacement of the Comb plate when necessary are important measures to ensure the boiler’s normal operation.

5. Technological Innovation: In the design and manufacturing process of power plant boilers, new technologies and innovations are continually being applied to the design of Comb plates. For example, some power plants improve the Comb plate structure by slotting in the middle of the comb-like steam seal body, embedding graphite or brush-type seals, to enhance the unit’s economy and safety.

In summary, the Comb plate is a vital part of the boiler’s heat exchange system, improving the boiler’s thermal efficiency and operational safety through its unique structural design and material selection. With continuous technological advancements, the design and application of Comb plates are also being optimized to meet higher operational requirements and environmental standards.