What is the difference between water-cooled wall grille anti-wear and spray anti-wear technology

　　Grid anti-wear and spray anti-wear are a circulating fluidized bed boiler water-cooled wall anti-wear technology, circulating fluidized bed boiler is also known as cfb boiler, the boiler project in the country around the world thermal power industry is more widely used. But circulating fluidized bed boiler water-cooled wall in actual operation is easy to wear, once the wear is serious will lead to water-cooled wall leakage burst tube, the danger is great.

　　In order to solve the circulating fluidized bed boiler water-cooled wall wear problem, many water-cooled wall anti-wear technology was born. For example, the grille anti-wear and spray anti-wear on two circulating fluidized bed boiler water-cooled wall anti-wear technology, then the water-cooled wall grille anti-wear and spray anti-wear technology, what is the difference?

　　First of all, we need to understand the principle of these two water-cooled wall anti-friction technology, spray anti-friction is divided into many kinds. Thermal spraying according to the different heat sources, divided into flame spraying, arc thermal spraying, plasma spraying and other circulating fluidized bed boilers are commonly used mainly arc spraying and flame spraying. Electric arc spraying uses the electric arc burning between two continuous and into the metal wire to melt the metal, with high-speed airflow to atomize the molten metal, and the atomized metal particles accelerated, so that it is sprayed to the surface of the pretreated body to form a coating. Supersonic flame spraying is a process in which the material to be sprayed is fed to the spray gun in powder form, heated to a plastic or molten state in an oxy-fuel flame, and injected onto the surface of the pretreated substrate using an expanding gas stream.

　　Grille anti-wear technology is through the surface of the water-cooled wall along the horizontal and vertical direction, the installation of alloy grille plate to form a grid grille, reduce the speed of the material particles on the surface of the water-cooled wall, block the formation of wall flow, and guide the flow cycle of the material on the surface of the water-cooled wall, optimize the surface flow field to eliminate local vortex. The construction plan is designed according to the wear characteristics of different boilers, which can play a role in treating both the symptoms and the root cause of wear in circulating fluidized bed boilers. It ensures the long-cycle operation of the boiler under high load and increases the fuel adaptability of the boiler (e.g., increasing the proportion of gangue and other blending).

　　Comparison of the two anti-wear technology, no matter which form of spray anti-wear is passive anti-wear, anti-wear cycle is short, need about 1 year to re-spray once. Grille anti-wear is active water-cooled wall anti-wear technology, anti-wear thoroughly, can completely solve the circulating fluidized bed boiler water-cooled wall wear problem, anti-wear cycle for a long time, a construction and installation once and for all, can ensure the safety and economy of the boiler for a long time.