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A circulating fluidized bed boiler is a kind of high-efficiency and energy-saving boiler equipment. It uses circulating fluidized bed technology to burn fuel under high temperatures and high pressure environments. Refractory materials are used when building circulating fluidized bed boilers to ensure They can withstand the high temperature when the boiler is running, so the selection of refractory materials is very important, so what refractory materials are needed for the construction of circulating fluidized bed boilers, today I will take you to understand.
1. High alumina refractory bricks. The high-temperature area inside the circulating fluidized bed boiler needs to use high-alumina refractory bricks to resist high-temperature corrosion and erosion. Sometimes the temperature can reach thousands of degrees. High-temperature resistance and corrosion resistance, able to withstand the impact and corrosion of high-temperature combustion gas in circulating fluidized bed boilers, we need to choose according to the used parts and choose suitable high-alumina refractory bricks for different parts for masonry.
2. Silicate refractory bricks. Silicate refractory brick is one of the main refractory materials for circulating fluidized bed boilers. Its main component is silicate. Silicate refractory brick has excellent high-temperature resistance, wear resistance, and alkali resistance, and can withstand circulating fluidized Impact and chemical attack of high-temperature combustion gases in fluidized bed boilers.
3. High-strength wear-resistant refractory castable. Since some parts of the circulating fluidized bed boiler need to be continuously circulated, its inner wall is easily subjected to constant erosion. Therefore, when selecting refractory castables, it is necessary to choose high-strength wear-resistant refractory castables. This castable is not easy The wear-resistant refractory castable has good chemical stability, can resist acid and alkali corrosion, and can ensure the long-term stable operation of the boiler.
4. Refractory fiber. Since the outer guard plate of the economizer of the circulating fluidized bed boiler, the air preheater, the membrane wall of the furnace chamber, and other parts need to be kept warm, it is necessary to choose a refractory material with a heat preservation function, and the refractory fiber has excellent heat insulation performance and high-temperature resistance. Performance can effectively reduce the heat loss of the circulating fluidized bed boiler.
Choosing the right refractory material to build a circulating fluidized bed boiler is an important prerequisite to ensure the normal operation of the boiler. If you choose an inappropriate refractory material, it will lead to troublesome maintenance in the later period. Correctly select the refractory material for each part Only in this way can it withstand the high temperature and high pressure environment in the circulating fluidized bed boiler to ensure the normal operation, safety, and stability of the boiler.
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