Application of anti-coking, wear-resistant and anti-corrosion self-sintering water-based paint in boiler repair

       During the operation of the boiler, the combustion temperature in the furnace can reach above 1500°C to 1600°C. In such an environment, the fly ash will mostly be in a molten state. Under normal circumstances, the furnace of the coal-fired power plant boiler itself has a relatively strong cooling capacity, which can ensure that the furnace smoke is quickly reduced to the softening temperature of the ash when it is near the furnace outlet. The molten ash burned in the furnace can condense into corresponding solid ash near the furnace, and will not form slag in the heating surface. It should be noted that if the cooling capacity of the furnace itself is not good enough, it will cause itself to be skewed, and even worse. Overload operation will occur, which will cause the smoke temperature near the water cooling wall to be too high, and the molten ash cannot be solidified in time, thus sticking to the water cooling wall to form corresponding slag.

During the combustion process, improper operation will cause the flame to be deflected or the primary and secondary air coordination will be unreasonable. coke. Due to insufficient air supply or poor mixing of fuel and air, the fuel does not reach complete combustion, and the incomplete combustion will generate reducing gas, and the melting point of ash will be greatly reduced. The lower the melting point of ash, the easier it is to coke. . The heat load of the furnace volume is too large. When the boiler runs beyond the power, the furnace temperature is too high, and when the ash particles reach the water-cooled wall surface and the furnace outlet, they cannot be cooled enough, resulting in coking. Soot blowing and decoking are not timely. The wall temperature of the heating surface rises, resulting in serious coking on the heating surface.

wococarbide.com's innovative anti-coking, wear-resistant and anti-corrosion self-sintering water-based coating adopts thermal spraying technology to prepare composite sol binder type ceramic metal coating. Excellent; anti-coking after sintering, and wear-resistant and anti-corrosion; long-term temperature resistance of 1100 ° C, the abrasive wear performance of the coating at high temperature is more than 50 times that of 20G steel; at the same time, the coating process is simple, and the requirements for the surface pretreatment of the substrate are low, with excellent repair performance.