Membrane water wall coating high-frequency remelting gas tube bundle and oxidation method thereof

Abstract

The invention discloses a membrane water wall coating high-frequency remelting gas tube row and an oxidation method thereof.The membrane water wall coating high-frequency remelting gas tube row comprises a membrane water wall, the membrane water wall comprises a steel plate wall and steel welded tubes, the steel welded tubes are neatly arranged and densely welded to one side of the steel plate wall, and hollow holes are formed in the steel welded tubes; the device further comprises a coating high-frequency remelting mechanism, a gas pipe row control mechanism and an anti-corrosion coating pipe replacement oxidation method. The coating high-frequency remelting mechanism melts and softens an anti-corrosion coating pipe of the water cooling wall and a steel surface layer of the inner wall of the pipe, and the gas pipe row control mechanism sprays pure nitrogen or inert gas to control oxidation, takes away redundant heat in time and prevents local overheating. The deep corrosion defect of the inner wall of the hollow pipe can be removed or relieved, the high-quality inner diameter surface can be recast and sized, a new anti-corrosion metal pipe can be conveniently replaced and recycled, the service life of the membrane type water cooling wall is greatly prolonged, hot installation is adopted, installation is easy, and attaching is tight during cooling; the high-frequency coil is adopted for local heating, control is reliable, energy conservation and environment protection are achieved, and the physical and chemical properties of the wall thickness of the hollow pipe body are not affected by local overheating.

Description

technical field [0001] The invention relates to the technical field of garbage incinerators, in particular to a membrane-type water-cooled wall-coated high-frequency remelting gas pipe row and an oxidation method thereof. Background technique [0002] Garbage incinerators generate a lot of heat when they incinerate garbage. At present, the industry uses the furnace membrane water wall to deal with the heat. The membrane is actually a steel plate wall with water-through steel welded pipes, which has excellent mechanical properties. Strength and excellent heat transfer effect, low cost, easy processing, most of the heat generated by incineration conducts heat through the steel plate wall, is quickly absorbed by the flowing water in the steel welded pipe, generates high-temperature hot water or steam and is taken away, fast and efficient Deal with heat, effectively protect the garbage incinerator from overheating, and avoid burning out, but the high-temperature glue flow or wat...

AI Technical Summary

Problems solved by technology

[0004] At present, there are many coating methods and replacement methods to prevent the surface corrosion of the inner pipe, but the number of repeated coatings or replacements is very limited. When the steel pipe material of the inner pipe is exposed, the corrosion starts unevenly, and pits will appear on the surface after a certain period of time. When the depth of the irregular corrosion hole is greater than 1.5mm, the anticorrosion life of the inner pipe cannot be significantly increased when the conventional coating is rebuilt or replaced. The surface of the inner pipe must be recast to remove its surface It is very important to rebuild a smooth and non-destructive inner surface of the pipe due to potholes and holes. The inner surface of the pipe is slender and the space is extremely limited. The conventional high-frequency melting technology cannot be implemented. The present invention provides a special high-frequency melting in a special pipe with severely limited space. , Extrusion control aperture, installation of anti-corrosion replacement pipe and oxidation replacement method of anti-corrosion replacement pipe

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