Structure and method for anti-corrosive treatment of pure titanium plates of chimney steel inner cylinder and steel structure flue

Abstract

The invention discloses a structure and a method for anti-corrosive treatment of pure titanium plates of a chimney steel inner cylinder and a steel structure flue. An anti-corrosive layer which is respectively attached to the inner walls of a steel inner cylinder and a steel flue consists of a pure titanium plate and a steel plate keel, the pure titanium plates are sequentially overlapped along the edges in the peripheral and axial directions of the inner walls, and the overlapping part is welded by an argon arc welding way to form a protecting layer; for a connection method of each pure titanium plate and each steel plate keel, a strip steel plate keel is compounded onto all or part of four edges of the same side of each pure titanium plate through electric resistance sealing welding, so as to form different structures which are respectively provided with the keels at the periphery, the keels at the three edges, the keels at the two right edges, the keels at the left two edges, the keels at the upper and lower edges or the keels at the lower edges; the edge of one side, without the keel, of one pure titanium plate is mutually overlapped and connected with the edge of one side, with the keel, of the other pure titanium plate. The structure and the method can solve the technical problems of the traditional steel inner cylinder wall anti-corrosive structure after chimney wet process desulfurizing that the construction is complicated, the period is long, the cost is high, the anti-corrosive service life is short, and the like.

Description

technical field [0001] The invention relates to a chimney anticorrosion technology. In particular, it relates to an anti-corrosion technology for the steel structure inner cylinder wall after the wet desulfurization treatment of the chimney of the coal-fired unit. Background technique [0002] At present, non-metallic materials are mainly used as anti-corrosion layers for steel inner cylinder walls after wet desulfurization of chimneys in China, which can be roughly divided into three categories: coatings, foam glass bricks / vitrified ceramic bricks and glass fiber reinforced plastics; metal materials are currently mainly used in China. Titanium-steel clad plate uses the titanium metal layer in the clad plate as the anti-corrosion layer. [0003] The titanium plate has a very good anti-corrosion effect. The highly corrosive flue gas after desulfurization has little corrosion on the titanium plate. It is one of the anti-corrosion lining materials recommended by the Internatio...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a pure titanium plate anticorrosion treatment structure and method for a chimney steel inner cylinder and a steel structure flue, to solve the complex construction and long period of the anticorrosion structure of the steel inner cylinder wall after the traditional chimney wet desulfurization, Technical problems such as high cost and short anti-corrosion life

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