Treatment method of industrial closed cooling water system

A technology of closed cooling water and treatment methods, which is applied in natural water treatment, non-polluted water treatment, neutralized water/sewage treatment, etc., and can solve problems such as small application system, unsuitable industrial application scenarios, and high cost of corrosion inhibitors , to achieve standard indicators and steps, stable and stable corrosion inhibition effect, and good corrosion inhibition effect

Pending Publication Date: 2021-02-02
SANMEN NUCLEAR POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of this corrosion inhibitor is relatively high, the application system is small, and whether it can be applied to industrial-scale scenarios still needs to be verified, so it is not suitable for existing industrial application scenarios

Method used

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  • Treatment method of industrial closed cooling water system
  • Treatment method of industrial closed cooling water system
  • Treatment method of industrial closed cooling water system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0126] as attached figure 1As shown in the flowchart, the closed cooling water system of Sanmen 1-CCS is adopted in the present embodiment, and the corrosion inhibitor adopted in the present invention is adopted, so that in the cooling water, the concentration of nitrite is 1000ppm, and the concentration of molybdenum element is 300ppm , The concentration of TTA is 30ppm, the pH is 10.0, the content of Fe and Cu is tested (the content of Fe and Cu can directly reflect the corrosion inhibition effect of the system), and the measured data are as follows:

[0127]

Embodiment 2

[0129] The difference between this embodiment and Embodiment 1 is that the closed cooling water system of Sanmen 1-VYS is adopted in this embodiment. The concentration of nitrite is 1500ppm, the concentration of molybdenum is 600ppm, the concentration of TTA is 100ppm, and the pH is 11.0 to test the content of Fe and Cu. The measured data are as follows:

[0130]

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PUM

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Abstract

The invention provides a treatment method of an industrial closed cooling water system. According to the method, closed cooling water makes contact with a composite corrosion inhibitor, and the composite corrosion inhibitor comprises a nitrite-molybdate mixture, a copper corrosion inhibitor and a pH regulator; and through the composite corrosion inhibitor, the concentration of nitrite in the closed cooling water is 50-1,500 ppm, the concentration of a molybdenum element is 96-600 ppm, the concentration of the copper corrosion inhibitor is 5-100 ppm, and the pH value of the closed cooling wateris 8.5-11.0. By controlling the quality of a corrosion inhibitor and controlling the pH range in a medium, a stable corrosion inhibition effect can be achieved; and meanwhile, under the condition ofmaintaining a better corrosion inhibition environment, dosing frequency is also reduced, the risk of pipeline blockage is reduced, and long-term stable operation of a unit can be kept.

Description

technical field [0001] The invention belongs to the technical field of corrosion inhibition of circulating water systems, and in particular relates to a treatment method for an industrial closed cooling water system. Background technique [0002] In nuclear power, thermal power, petroleum, chemical and other industrial facilities, closed cooling water systems (such as chilled water systems, hot water systems, etc.) are designed to provide cold sources for the operation of HVAC coils, heat exchangers, pumps and other equipment / Heat source, providing guarantee for the stable operation of the factory. The common characteristics of the closed water system: long-term closed self-circulation, providing heat source or cold source for users, the system materials are mainly carbon steel pipes, stainless steel pipes and copper materials, the working environment is harsh, and it is easy to corrode. In order to reduce the corrosion of the system, prolong the service life of the equipm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/08C02F103/02
CPCC02F5/08C02F1/66C02F2103/023C02F2303/08
Inventor 侯涛聂雪超姜磊吴旭东钟铁范赏
Owner SANMEN NUCLEAR POWER CO LTD
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