Main causes of wear and tear of circulating fluidized bed boilers

      Circulating fluidized bed boiler in the domestic development time is not short, its because of energy saving, high efficiency, environmental protection characteristics in the country is widely used. In the country where the circulating fluidized bed boilers have been engaged in engineering and technical personnel, or maintenance workers, operating operators will feel the headache of circulating fluidized bed boiler wear problems.

　　Circulating fluidized bed boiler because of its own characteristics, will lead to the boiler furnace internal parts are subject to the high-speed flushing of dust-containing flue gas, the formation of wear and tear. Although many boiler plants have now recognized this problem, the boiler design will be used when many effective anti-wear measures. However, the actual operating situation is that the concentration of solid fuel particles in the furnace chamber of circulating fluidized bed boilers is tens or even hundreds of times higher than that of traditional pulverized coal boilers, and together with other operating conditions, the heating surface of circulating fluidized bed boilers is subjected to uninterrupted scouring by a large amount of solid materials, resulting in serious wear.

　　After research, it is found that the main part of the wear produced by circulating fluidized bed boilers occurs on the heating surface. About the circulating fluidized bed boiler heating surface wear, it mainly includes the water-cooled wall tube in the boiler chamber and the heating surface in the furnace. Circulating fluidized bed boiler heating surface wear reasons than the traditional pulverized coal furnace is much more complex, the main causes of its wear can be simply divided into the following categories.

　　1, the first is what we usually say circulating fluidized bed boiler flue gas in the granular material for the impact of the heating surface and wear.

　　2, the second is the surface of the circulating fluidized bed boiler heating surface by the relatively slow motion of the impact of the granular material and lead to wear.

　　3, the third is by referring to the circulating fluidized bed boiler heating surface movement of solid materials on the wall of the solid particles to pressure impact, the circulating fluidized bed boiler heating surface caused by wear.

　　To sum up, there are many factors that cause wear and tear of circulating fluidized bed boiler. For enterprises, they should scientifically analyze the main causes of circulating fluidized bed wear and choose the most suitable anti-wear solution to minimize the loss caused by wear.