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Steam generator tube sheet with anti-corrosion layer and preparation method thereof

A technology of steam generator and anti-corrosion layer, which is applied in the direction of steam generation, steam boiler, steam boiler accessories, etc., can solve problems such as sag, and achieve the effects of easy preparation process, improved advancement, and reduced tolerance

Inactive Publication Date: 2016-01-27
KOREA HYDRO & NUCLEAR POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to suppress this existing sinking phenomenon, the methods that have been adopted include a water chemical scheme to maintain the secondary side cooling water at a neutral level, and a gas cutting (lancing) and chemical method to remove the sediment 40 accumulated on the upper part of the tube sheet. Cleaning method, but pitting still exists

Method used

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  • Steam generator tube sheet with anti-corrosion layer and preparation method thereof
  • Steam generator tube sheet with anti-corrosion layer and preparation method thereof
  • Steam generator tube sheet with anti-corrosion layer and preparation method thereof

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preparation example Construction

[0047] refer to figure 2 , the preparation method of the steam generator tube plate 100 is as follows, and the steam generator tube plate 100 supports the heat transfer tubes 200 of the steam generator. The method for the tube sheet 100 of the vaporizer having an anti-corrosion layer of the present invention comprises the following steps: providing a steam generator tube sheet 100 of a certain thickness; plating the primary side tube sheet surface 11 and the secondary side tube sheet surface with a corrosion-resistant metal 20 12. Perform heat treatment on the above-mentioned plated steam generator tube plate 100; drill holes to form heat transfer tube installation holes 30 on the above-mentioned heat-treated steam generator tube plate 100.

[0048] The preparation method of the steam generator tube sheet 100 with an anti-corrosion layer of the present invention is prepared through the following steps, that is, preparing a steam generator tube sheet 100 of a certain thickness...

Embodiment

[0060] Figure 5 ~ Figure 7 Alloy 690, one of the corrosion-resistant metals 20 used for plating, and SA508Cl. The result of the comparison. Figure 5 It is the result of measuring and comparing the electrochemical corrosion rates of alloy 690 and SA508Cl.3 when the pH of the test solution is 2; Image 6 It is the result of measuring and comparing the electrochemical corrosion rates of alloy 690 and SA508Cl.3 when the pH of the test solution is 7; Figure 7 It is the result of measuring and comparing the electrochemical corrosion rates of alloy 690 and SA508Cl.3 when the pH of the test solution is 12.

[0061] refer to Figure 5 It can be seen that when the pH of the test solution is 2, the electrochemical corrosion rate of alloy 690 is reduced to 1 / 145 compared with SA508Cl.3 which is the material of the conventional tube sheet 100 . refer to Image 6 It can be seen that when the pH of the test solution is 7, the electrochemical corrosion rate of alloy 690 is reduced to ...

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Abstract

The invention relates to a tube plate of a steam generator and a preparation method thereof. The tube plate of the steam generator supports heat transfer tubes of the steam generator. In particular, it relates to a steam generator tube plate with an anti-corrosion layer and a preparation method thereof. Specifically, the steam generator tube sheet with an anti-corrosion layer includes: a steam generator tube sheet, which supports the heat transfer tube of the vaporizer; and a corrosion-resistant metal, which is plated on the surface of the primary side tube sheet and the surface of the secondary side tube sheet superior. In addition, a method for preparing a steam generator tube sheet with an anti-corrosion layer includes the steps of: coating the surface of the primary side tube sheet and the surface of the secondary side tube sheet with a corrosion-resistant metal; heat-treating the above-mentioned coated tube sheet; and drilling holes, forming heat transfer tube mounting holes on the heat-treated tube sheet; thereby inhibiting the corrosion of the surface of the primary side tube sheet and the surface of the secondary side tube sheet, and preventing the depression and stress corrosion cracking of the heat transfer tube, thereby improving The reliability of the steam generator.

Description

technical field [0001] The invention relates to a steam generator tube plate with an anti-corrosion layer and a preparation method thereof, which is used for preventing corrosion of the steam generator tube plate of a nuclear power plant and denting of heat transfer tubes. Background technique [0002] Nuclear power generation utilizes the heat generated by the nuclear fission reaction of the nuclear fuel in the nuclear reactor pressure vessel. The heat generated in nuclear fission is transferred to the primary side that circulates between the fuel assembly and the vaporizer. The heated water on the primary side transfers heat to the secondary side in the steam generator, the resulting steam turns the turbine generator. After passing through the secondary side of the turbine, the temperature is reduced in the condenser and enters the steam generator again. [0003] At this time, the cooling water that flows through the primary side—the water that circulates between the nuc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B37/00F28F9/013F28F19/06
CPCF22B37/002F22B37/24Y02E30/30G21C15/02
Inventor 许度行崔明植李德铉金京模韩正浩
Owner KOREA HYDRO & NUCLEAR POWER CO LTD
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