Circulating fluidized bed boiler water-cooled wall common wear and anti-erossion measures

      Circulating fluidized bed boiler is one of the indispensable equipment for thermal power generation, because of its own fuel adaptability, high energy efficiency, to meet the requirements of environmental protection everywhere, so it is widely used in the industrial field. But also because of the characteristics of circulating fluidization itself, circulating fluidized bed boiler water-cooled wall heating surface wear problem also affects the normal operation of the boiler daily.

　　Water-cooled wall wear hazard

　　Circulating fluidized bed boiler water-cooled wall after a long time of wear, will lead to water-cooled wall thinning, once the water-cooled wall is too thin will not be able to withstand the pressure inside the boiler will occur water-cooled wall tube leakage problem.

　　A thermal power plant in the period from 2009 to 2016, because of water-cooled wall wear burst tube stopping times 25 times, accounting for 76% of the total number of outages. this data can show how the water-cooled wall wear is affecting the daily smooth operation of thermal power plants. Only by solving the problem of water-cooled wall wear prevention can we greatly reduce the number of power plant shutdowns and improve the economic efficiency of power plants.

　　Water-cooled wall active anti-erossion technology

　　For the water-cooled wall wear problem, we have researched and introduced the circulating fluidized bed boiler grill anti-wear technology to the market after years of research. This technology is a kind of water-cooled wall active anti-wear technology, in the water-cooled wall surface along the horizontal and vertical direction, installed alloy grating plate to form a mesh grating, block the formation of high-speed wall flow, optimize the water-cooled wall surface flow field, eliminate local vortex, reduce the velocity of gas-solid two-phase flow against the wall, reduce the cutting force of material particles on the water-cooled wall, so as to effectively control the water-cooled wall anti-wear problem.

　　This technology has been applied on more than 200 circulating fluidized bed boilers and has been well received by major power plants. It has solved the problem of anti-wear in circulating fluidized bed boilers, and also greatly improved the energy efficiency of boilers.