Method for cleaning copper tubes of condenser

A technology for condensers and copper tubes is applied in the field of cleaning heat transfer pipes, which can solve the problems of a large amount of funds for robots and high cleaning costs, and achieve the effects of low cost, good cleaning effect and less time-consuming cleaning.

Active Publication Date: 2009-12-23
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These technical solutions all have the function of cleaning the copper tube of the condenser, but the development of the robot requires a lot of funds, and the cleaning cost is also high

Method used

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  • Method for cleaning copper tubes of condenser

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Experimental program
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Effect test

Embodiment

[0022] Embodiment This method is applied in the power plant of Wengfu (Group) Co., Ltd. to clean the copper pipe of the steam turbine condenser of the plant.

[0023] First, after the steam turbine condenser is shut down, the circulating water inlet valve 2 and outlet valve 3 of a single condenser 1 are closed;

[0024] The second step is to rinse the condenser 1 copper tube with clean water for 1 hour;

[0025] The third step is to inject an acidic chemical cleaning solution into the water side of condenser 1. The formula is 0.3% of pickling corrosion inhibitor Lan-826, 0.1% of copper corrosion inhibitor tolyltriazole, 100mg / L of penetrant JFC, chemical Cleaning agent sulfamic acid 6.0%, dispersant polyacrylic acid PAA 200mg / L, soak and clean for 6 hours;

[0026] The fourth step is to neutralize the soaking solution with caustic soda solution until the pH value reaches 6.0-7.0;

[0027] The fifth step is to rinse the copper pipe of the condenser 1 with clean water for 1 ho...

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Abstract

A method for cleaning copper tubes of a condenser relates to the cleaning of heat transfer pipelines. The method comprises the following steps: the first step, closing an inlet valve and an outlet valve of circulating water after a turbine condenser is shut down; the second step, flushing the copper tubes of the condenser with clean water; the third step, injecting acid chemical cleaning liquor at water side of the condenser for soak cleaning; the fourth step, neutralizing soak solution with sodium hydroxide; the fifth step, flushing the copper tubes of the condenser with clean water; the sixth step, rinsing the copper tubes of the condenser with clean water; and the seventh step, replacing membrane, and commissioning after cleaning. Compared with the original method of cleaning with chemical agents to be added to a circulating water tank, the method is characterized in that chemical cleaning liquor is added to a single turbine condenser, which can help clean fouling off the copper tubes and improve vacuum degree of the turbine while ensuring no corrosion of the copper tubes, and has the advantages of low agent consumption, low cost, low corrosion rate, good cleaning effect and saving cleaning time. The method can be widely applied to cleaning and maintenance of the copper tubes of the condensers in power plants.

Description

technical field [0001] The invention relates to the cleaning of heat transfer pipes, and more specifically, to a method for cleaning copper tubes of condensers. Background technique [0002] At present, the cleaning method of condenser copper pipes is generally chemically treated in the circulating water system, and the dosing point is located in the circulating water pool. The temperature at the inlet end of the copper pipe of the condenser is low, which is easy to corrode the copper pipe, and the temperature at the outlet end is high and easy to deposit scale. When the circulating water is chemically treated, the starting point is to ensure that the copper pipe is not corroded. In this way, the copper pipe will accumulate scale after a long time, the heat exchange effect of the condenser will become poor, and the vacuum degree will decrease. [0003] In recent years, people have developed some technologies for cleaning copper tubes of condensers with robots, such as Chine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28G9/00C23G1/10C23G1/04C23G1/06
Inventor 吴选文唐文志柳忠祥莫义良李支元
Owner WENGFU (GRP) CO LTD
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