Practical application of grating anti-friction technology for circulating fluidized bed boilers in thermal power plants

      The first phase of a domestic power plant was built with an installed capacity of 2 × 50 MW cogeneration units, and the two units were put into commercial operation in March and August 2006, respectively. As of May 2015, the 2 boilers have operated for about 5,800 hours, with a total of boiler leakage problems.

　　The main cause of the boiler leakage in this power plant is due to the water-cooled wall wear problem. The power plant sprayed the boiler water-cooled wall locally in 2013 for anti-wear treatment, but there was still one water-cooled wall wear leakage in the sprayed area in 2013 and one in early 2014.

　　Spraying anti-wear effect is not ideal, so how to solve the thermal power plant water-cooled wall anti-wear it! The power plant later used the grille anti-wear technology we developed to completely solve the water-cooled wall wear leading to burst pipe shutdown events.

　　After years of research and discovery, we introduced the grille anti-friction technology. This technology is different from the spray anti-wear, grille anti-wear is an active anti-wear technology. It is installed on the surface of the water-cooled wall along the horizontal and vertical directions, alloy grating plate to form a mesh grating, blocking the formation of high-speed wall flow, optimize the flow field on the surface of the water-cooled wall, eliminate local vortex, reduce the speed of two-phase flow against the wall, reduce the cutting force of material particles on the water-cooled wall.

　　This technology has been applied to the boilers of many large thermal power plants at home and abroad, and no power plant has had a leaky tube shutdown. Compared with the traditional spraying type anti-wear technology, the grille anti-wear is more stable and durable.