What are the causes of boiler wall spalling?

Publish Time:

2023-07-11

　　Boiler wall spalling is a serious problem during boiler operation. The main reasons are as follows:

　　Overheating: When the boiler wall is at a high temperature for a long time, it will cause overheating and deformation of the wall material, resulting in a loss of its original strength and stability, leading to wall spalling.

　　Flue gas corrosion: Boiler flue gas may contain acidic gases or dust containing acidic components. Long-term exposure to the furnace wall surface will cause corrosion and damage to the furnace wall material, leading to wall spalling.

　　Poor quality of furnace wall materials: If the quality of the furnace wall materials is not up to standard, and the strength, toughness, and corrosion resistance of the materials cannot meet the operating requirements, it is easy to cause cracks and spalling of the furnace wall.

　　Design defects: Unreasonable boiler design, such as improper furnace wall structure design and improper material selection, will lead to furnace wall spalling.

　　Improper operation: Improper operation by operators, such as excessive heating and rapid changes in operating conditions, will accelerate the aging and damage of the furnace wall and increase the risk of furnace wall spalling.

　　In summary, in order to prevent boiler wall spalling, appropriate furnace wall materials should be selected, furnace wall maintenance should be strengthened, and regular inspection and repair of the furnace wall should be carried out to ensure the normal operation of the boiler.

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