Domestic and foreign circulating fluidized bed boiler wear analysis and anti-wear technology discussion

      Circulating fluidized bed boiler combustion technology is an efficient and clean combustion technology, which has been widely used not only in foreign countries. With the growing awareness of environmental protection in China, circulating fluidized bed boilers have therefore also been widely used in China as well. For example, many domestic power plants have replaced the traditional pulverized coal furnace with circulating fluidized bed boilers. With the development of circulating fluidized bed boiler combustion technology, China's circulating fluidized bed boiler combustion technology has caught up with foreign countries.

　　Although China's circulating fluidized bed boiler combustion technology has been developed for decades, some technology has caught up with foreign countries, but the boiler there is a very headache for enterprises. Because of the combustion characteristics of circulating fluidized bed boilers, boiler wear is one of the most important problems affecting the smooth operation of circulating fluidized bed boilers. So far, circulating fluidized bed boilers basically have wear problems in the combustion process.

　　Circulating fluidized bed main wear causes

　　1, the impact of flue gas particle concentration, the greater the concentration of flue gas particles in the circulating fluidized bed boiler, the greater the wear and tear in the furnace.

　　2, the nature of the fuel factors, because circulating fluidized bed boilers use fuel will be messy, there will not be a lot of quality fuel. The properties of the fuel are different, the greater the particles and hardness and ashiness of the fuel, the stronger the wear on the furnace.

　　Of course, there are too many factors that affect the wear and tear of circulating fluidized bed boilers, so I won't list them all here. Boiler wear and tear directly affects the enterprise can safely produce, of course, more affect the economic efficiency of enterprises, so that enterprises suffer.

　　After years of research on circulating fluidized bed boiler wear, we found and introduced the grille anti-wear technology to the market first. This technology is a kind of active anti-wear technology, which is to install alloy grating plate along the horizontal and vertical directions on the surface of the water-cooled wall of circulating fluidized bed boiler to form a mesh grating, blocking the formation of high-speed wall flow, optimizing the flow field on the surface of the water-cooled wall, eliminating local vortex, reducing the velocity of the wall movement of gas-solid two-phase flow, reducing the cutting force of material particles on the water-cooled wall, so as to effectively control the water-cooled wall wear problem.