Boiler economizer with supersonically sprayed abrasion and corrosion resistant coating

Abstract

The invention discloses a boiler economizer with a supersonic spraying wear-resistant and anti-corrosion coating, which comprises a fire-resistant wall, the outer wall of the fire-resistant wall is vertically provided with support plates, and the support plates are the same two groups, two groups The support plate is left-right symmetrical on the outer wall of the refractory wall, and the outer wall of the support plate is horizontally provided with water-cooled pipes. In the present invention, an anti-corrosion coating is sprayed on the outer wall of the water-cooling tube, and a high-temperature-resistant coating is sprayed on the outer wall of the anti-corrosion coating. The outer wall of the high-temperature resistant coating is sprayed with a wear-resistant coating, which increases the wear resistance and corrosion resistance of the economizer water-cooled pipe, and slows down the long-term wear of the material carried by the flue gas. The wall of the water-cooled pipe is rapidly thinned. The problem is that through the cooperation of the water-cooled tube and the elastic part, the economizer's water-cooled tube has a powerful relief effect when it is heated and expanded, and it prevents the water-cooled tube from cracking, sealing failure, and explosion due to the absence of a corresponding force-relieving device. gray problem.

Description

technical field [0001] The invention relates to the technical field of boiler economizers, in particular to a boiler economizer water cooling tube with a supersonic sprayed wear-resistant and anti-corrosion coating. Background technique [0002] At present, there are two HG-75 / 5.3-L.HM circulating fluidized bed boilers in the commonly used coal chemical sector. In recent years, with the continuous improvement of people's awareness of environmental protection, circulating fluidized bed boilers have been widely used due to their high-efficiency desulfurization and denitrification advantages. The reason for the failure and leakage is that the water cooling tube on the boiler economizer has local wear and shedding phenomenon. Under the effect of long-term wear and tear of the material carried by the flue gas, the wall of the water cooling tube is rapidly thinned and leaks, and the flue gas is in the economizer. In the coiled tube of the water-cooled tube, the updraft and downdr...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a boiler water-cooled tube with a supersonic sprayed wear-resistant and anti-corrosion coating, so as to solve the problem that the wall of the water-cooled tube is rapidly weakened under the long-term wear of the material carried by the flue gas in the background technology. Thinness, leakage, and the expansion of the heated metal of the boiler water-cooled tube will cause the water-cooled tube to be subjected to a large expansion force. Since the current water-cooled wall has no corresponding force relief device, it is easy to cause the water-cooled tube to crack, seal failure, and dust. question

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