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Turbin steam condenser water chamber anticorrosion device and its manufacturing method

A technology of anti-corrosion and condenser, applied in the direction of damage protection, heat exchange equipment, lighting and heating equipment, etc., can solve the problems of eliminating corrosion, achieve the effect of controlling corrosion, good anti-corrosion effect, and improving user economic benefits

Inactive Publication Date: 2004-03-03
DONGFANG TURBINE CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

The inner surface of the water chamber, the water side of the end tube plate, and the inner surface of the connecting pipe are lined with rubber and coated with anti-corrosion coatings, etc., which can only isolate the corrosive medium from the anode material and slow down the corrosion rate, but cannot fundamentally eliminate the occurrence and development of corrosion

Method used

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  • Turbin steam condenser water chamber anticorrosion device and its manufacturing method
  • Turbin steam condenser water chamber anticorrosion device and its manufacturing method

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] The structure of the water chamber of the steam turbine condenser is as follows: figure 1 As shown: the water chamber 1 is composed of a spherical wall 3 and an end tube plate 2 butted.

[0026] Firstly, an anti-corrosion coating 5 is made on the inner surface of the spherical wall 3 , the water side surface of the end tube plate 2 and the inner surface of the connecting pipe 4 . The method is: first clean and degrease the surface, sandblast and remove rust, and then thermally spray the aluminum protective layer with a thickness of 0.10-0.15mm; Sandblasting should be carried out as soon as possible after rust removal, usually not more than 4 hours; after thermal spraying aluminum, apply epoxy coal tar primer in time, and apply epoxy coal tar topcoat once after the surface is dry. Then install the sacrificial anode 6, in view of the heat excha...

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Abstract

An anticorrosion mechanism for the water chamber of steam condenser in turbine is composed of coated anticorrosion layer and sacrificial anode protector. A process for preparing said coated anticorrosion layer includes such steps as washing for removing oil, blasting sand for removing rust, thermally spraying aluminium, and coating epoxy coal asphalt paint. Said sacrificial anode is welded in water chamber or to communicating tube. Its advantages are high anticorrosion effect and low cost.

Description

technical field [0001] The invention relates to an anti-corrosion facility, in particular to an anti-corrosion facility for a steam turbine condenser water chamber and a manufacturing method thereof. Background technique [0002] The heat exchange tube in the steam turbine condenser has a huge heat exchange area. In the cooling water system, it forms a macroscopic galvanic corrosion system with the carbon steel water chamber and its end tube plate. The former has a relatively positive potential and is the cathode. ; The latter has a more negative potential and is an anode. The area ratio of the cathode to the anode is 60-80:1. This galvanic structure with a large cathode and a small anode will accelerate the corrosion rate of the anode by dozens of times. The inner surface of the water chamber, the water side of the end tube plate, and the inner surface of the connecting pipe are lined with rubber and coated with anti-corrosion coatings, etc., which can only isolate the cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C23F13/06C23F17/00F28F19/00
Inventor 姜英王荣贵胡蕴成
Owner DONGFANG TURBINE CO LTD
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