When addressing the boiler's adaptability to different coal types and load conditions, a novel tamper-resistant belt was developed based on the minimum stable combustion load required by the boiler and the specific characteristics of the coal. This belt utilizes a two-layer or three-layer insulation board stacking structure, offering enhanced flexibility and durability under varying operational conditions.
The adjustable tamper-proof belt system consists of three primary layers: an inner, middle, and outer heat-insulating board. Each layer is constructed using microporous ceramic insulation boards combined with heat-resistant steel structures. These components are integrated through an embedded method, ensuring a secure and stable configuration that can withstand high-temperature environments without compromising performance.
The ceramic insulation board, which is directly exposed to the flame, is made from ceramic fiber paper. Meanwhile, the supporting steel framework is constructed using heat-resistant flat steel or angle steel, which remains shielded from direct flame exposure. The ceramic heat shield plate is designed with a smooth surface facing the fire and a microporous structure on the opposite side. The pore density can be precisely controlled during the foam manufacturing process, ranging between 0.5 and 2.0 mm, allowing for optimal thermal resistance and airflow management.
Thanks to its embedded design, the ceramic heat shield is not subjected to external mechanical forces under normal operating conditions, which reduces the need for high structural strength. Instead, the weight of the entire insulation layer and the frictional resistance during movement are supported by the steel framework. This design ensures that the steel structures within each active insulation layer remain within their allowable long-term operating temperature limits, while also maintaining sufficient strength margins to handle the harsh conditions inside the furnace.
This innovative approach enhances the boiler's efficiency and stability across a wide range of coal types and load variations, making it a reliable solution for modern industrial applications.
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