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Water scale and corrosion inhibitor for high-temperature gas cooled reactor nuclear island plant and dosing method

A scale and corrosion inhibitor, high-temperature gas-cooled reactor technology, applied in chemical instruments and methods, natural water treatment, non-polluted water treatment, etc., can solve system scaling, water quality deterioration, corrosion and other problems

Inactive Publication Date: 2021-09-10
HUANENG SHANDONG SHIDAOBAY NUCLEAR POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the cooling water repeatedly flows through the cooling tower, the water quality continues to deteriorate, which is likely to cause problems such as system scaling and corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Percentage by weight: 5% polyamido-amine dendrimers, 10% 2-phospho-1,2,4-tricarboxylic acid butane, 3% imidazoline, 1% penetrant, 10 % of organic solvents and 71% of deionized water are prepared to form the stock solution of scale and corrosion inhibitors for the water system of high-temperature gas-cooled reactor nuclear island plants.

[0021] Take 1000L high-temperature gas-cooled reactor nuclear island plant water supply water system, add 15g of the scale and corrosion inhibitor stock solution of this embodiment, raise the temperature to 45°C, set the circulating water flow rate to 1000L / h, under the open cycle test conditions, Increase the concentration ratio of circulating water to 4 times, and conduct a dynamic simulation test. After running for 500 hours, the corrosion rate of carbon steel is ≤0.075mm / a, the corrosion rate of copper is ≤0.005mm / a, the corrosion rate of austenitic stainless steel (S30408, S30408II) is ≤0.005mm / a, and the scale inhibition rate of ...

Embodiment 2

[0023] Percentage by weight: 10% polyamido-amine dendrimers, 40% 2-phospho-1,2,4-tricarboxylic butane, 20% imidazoline, 10% penetrant, 10 % of organic solvent and 10% of deionized water are prepared to form the stock solution of scale and corrosion inhibitor for the water system of high temperature gas-cooled reactor nuclear island plant.

[0024] Take 1000L high-temperature gas-cooled reactor nuclear island plant water system replenishment water, add 20g of the scale and corrosion inhibitor stock solution of this embodiment, raise the temperature to 45°C, set the circulating water flow rate to 1000L / h, under the open cycle test conditions, Increase the concentration ratio of circulating water to 4 times, and conduct a dynamic simulation test. After running for 500 hours, the corrosion rate of carbon steel is ≤0.075mm / a, the corrosion rate of copper is ≤0.005mm / a, the corrosion rate of austenitic stainless steel (S30408, S30408II) is ≤0.005mm / a, and the scale inhibition rate o...

Embodiment 3

[0026] Percentage by weight: 8% polyamido-amine type dendritic polymer, 25% 2-phospho-1,2,4-tricarboxylic acid butane, 12% imidazoline, 5% penetrant, 10 % of organic solvent and 40% of deionized water are prepared to form the stock solution of scale and corrosion inhibitor for the water system of high temperature gas-cooled reactor nuclear island plant.

[0027] Add 25kg of scale and corrosion inhibitor stock solution to the dosing box, add water to dilute to 500L and stir evenly, and the plant water system performs continuous water replenishment and drainage, and the normal water replenishment and drainage are 8m 3 / h, press 1m 3 Add 20g of scale and corrosion inhibitor stock solution for water supplementation, and add the scale and corrosion inhibitor solution to the circulating cooling water of the plant water system continuously and at a constant flow rate through the dosing pump. Monitor the total alkalinity, total hardness, chloride ion, pH value, turbidity, and conduct...

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Abstract

The invention relates to a water scale and corrosion inhibitor for a high temperature gas cooled reactor nuclear island plant and a dosing method. The water scale and corrosion inhibitor comprises the following components by weight: 5-10% of an amine type dendritic high polymer, 10-40% of phosphoric acid carboxylic acid butane, 3-20% of an imidazoline cyclic amine compound, 1-10% of a penetrant, and the balance of deionized water and an organic solvent, wherein the proportion of the components is 100% in total. A proper scale and corrosion inhibitor is added into the nuclear island plant water system to control the scaling rate of a heat exchanger of the system and the corrosion rate of materials such as carbon steel, 304 stainless steel and red copper in the system.

Description

technical field [0001] The invention belongs to the technical field of high-temperature gas-cooled reactor water, in particular to a scale and corrosion inhibitor for high-temperature gas-cooled reactor nuclear island plant water and a dosing method. Background technique [0002] The water system of the high-temperature gas-cooled reactor nuclear island plant provides cooling water for the cooling water system of the nuclear island equipment and the heat exchanger of the cold water system, and dissipates the heat to the atmosphere through the cooling tower. industrial water. The water system of the nuclear island plant is composed of pools, circulation pumps, pipelines, heat exchangers, and mechanical ventilation cooling towers. The materials of the system equipment and pipelines mainly include carbon steel, 304 stainless steel, and copper. [0003] The cooling water in the plant water system circulates and evaporates in the cooling tower to lose part of the water, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14C02F5/10C02F103/02
CPCC02F5/14C02F5/10C02F2103/023C02F2303/08
Inventor 马倩韩成姚洪猛贾文婷
Owner HUANENG SHANDONG SHIDAOBAY NUCLEAR POWER CO LTD
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