Preparation method of nuclear power cooling liquid
The nuclear power plant coolant prepared by modifying composite organic amine corrosion inhibitors and using nanotechnology solves the problems of corrosion inhibitor precipitation, performance degradation, and high cost in existing nuclear power plant coolants during use, achieving efficient and low-cost cooling effects, and is suitable for open environments such as IT equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DAOQI TECH CO LTD
- Filing Date
- 2026-01-26
- Publication Date
- 2026-05-26
Smart Images
Figure CN122080992A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of nuclear power plant coolant technology, and more specifically, to a method for preparing nuclear power plant coolant. Background Technology
[0002] There are various types of nuclear power plant coolants, including alcohol-based, inorganic salt-based, and polysaccharide-based coolants. Alcohol-based coolants are the most widely used due to their advantages such as low corrosivity to cooling system components, low freezing point, and good stability. Existing cutting coolants mainly use inorganic salt corrosion inhibitor composite formulations, which have inherent drawbacks in terms of service life and storage stability. These drawbacks primarily include the tendency for inorganic salt corrosion inhibitors to precipitate during the reaction mechanism, leading to a significant reduction in corrosion inhibition effectiveness after prolonged use. This results in excessively high tool temperatures, drastically reduced performance, and a sharp decrease in tool life. Current technology has researched silicate stabilizers, synthesizing highly effective silicate stabilizers that have solved the stability problem and have been successfully applied to engine coolant products. However, the high price of stabilizer raw materials limits their widespread adoption, and the Chinese market currently still dominated by inorganic silicate-based conventional engine coolants. Organic acid-based engine coolants offer excellent overall protection, and their additives are consumed at a low rate during actual use, making them long-life products. Engine coolants containing organic acids are now appearing on the market. These are produced by combining inorganic components with organic acid corrosion inhibitors, resulting in products with better overall performance. However, the supply of organic acid raw materials from the petrochemical industry still restricts the production of engine coolants formulated with organic acid corrosion inhibitors. Furthermore, current IT equipment typically uses indirect cooling with water as the medium when employing liquid cooling technology, which carries the risk of water leakage. Existing direct cooling coolants are mostly used in engines and transformers, but these coolants are primarily used in enclosed environments. In open environments, they exhibit volatility and instability, making them unsuitable for cooling IT equipment. There have been attempts abroad to use organic fluorine compounds for direct cooling of IT equipment, but the high cost of organic fluorine compounds has prevented large-scale adoption. Summary of the Invention
[0003] (a) Technical problems to be solved
[0004] In view of the problems existing in the prior art, the present invention provides a method for preparing nuclear power plant coolant to solve the technical problems mentioned in the background art.
[0005] (II) Technical Solution
[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing nuclear power plant coolant, comprising the following steps:
[0007] Step 1: Preparation of basic materials, including preparation of base fluid, which includes the base oil being made by mixing ethylene glycol, water and 5-sulfosalicylic acid and silicone oil, and also includes mineral base oil, 2,6-di-tert-butyl-p-cresol, antioxidant, dimethyl silicone oil and polyisobutylene bis(succinimide), nonionic dispersant, nanoparticles, corrosion inhibitor and solvent.
[0008] Step 2: Take mineral base oil, add antioxidant, heat and stir until clear and transparent, cool to room temperature, and prepare corrosion inhibitor. The corrosion inhibitor is a modified composite organic amine corrosion inhibitor.
[0009] Step 3: Add antioxidant to the solution obtained in the above steps and stir until completely dissolved. Preparation of modified nanofiller: Mix dimethylacetamide and 5% acetic acid aqueous solution at a mass ratio of 1:45-47, add to the reaction vessel, stir at 200 r / min for 10 min under inert gas protection, let stand for 30 min, then heat to 60-65℃ and stir at 500 r / min for 1-2 hours to obtain a mixture. Add 5.2-5.5% graphene by mass to the mixture, stir at 1000 r / min for 3 hours, let stand for 2 hours, filter, wash with deionized water, and dry to constant weight to obtain modified nanofiller.
[0010] Step 4: Add defoamer to the obtained solution and stir until the reaction is complete; add dispersant to the solution described in the above step and stir until evenly mixed; filter the obtained solution after natural cooling to obtain the coolant; wherein, by mass percentage, simultaneously, under water bath heat preservation, 100-102 parts by weight of base liquid, 3-5 parts by corrosion inhibitor, and 1.2-1.6 parts by weight of modified nanofiller are added to the reaction vessel in sequence, and stirred at 3000 r / min for 2 hours to obtain the coolant.
[0011] The present invention is further configured such that, in step four, the mineral base oil is 99.90-99.975%, the antioxidant is 0.01-0.04% 2,6-di-tert-butyl-p-cresol and 0.01-0.04% antioxidant 135, the defoamer is 0.001-0.01% dimethyl silicone oil, and the dispersant is 0.004-0.01% polyisobutylene bis(succinimide).
[0012] The present invention is further configured such that step two includes preparing water and ethylene glycol in a certain proportion at room temperature, placing them in a container, and stirring evenly at 200 rpm for 1 hour until they are evenly mixed.
[0013] The present invention is further configured such that the mass ratio of ethylene glycol to silicone oil in the base solution is 50:5-6, the mass ratio of ethylene glycol to water is 50:80-85, and the mass ratio of ethylene glycol to 5-sulfosalicylic acid is 50:1.2-1.5.
[0014] The present invention is further configured such that the antifreeze includes 45-55 parts of ethylene glycol, 45-55 parts of propylene glycol, 0.2-0.4 parts of benzotriazole, 0.1 parts of ethylparaben, 0.1-0.3 parts of sodium lignosulfonate, and 0.2-0.4 parts of carbolic acid.
[0015] The present invention is further configured such that, in the coolant raw materials: ethylene glycol and propylene glycol are mother liquors, benzotriazole is a rust inhibitor, ethylparaben is a preservative, sodium lignosulfonate is a nano-dispersant, and carbolic acid is a bactericide and disinfectant.
[0016] The present invention is further configured to be prepared from the above-mentioned raw materials: 50 parts of ethylene glycol, 50 parts of propylene glycol, 0.3 parts of benzotriazole, 0.1 parts of ethylparaben, 0.2 parts of sodium lignosulfonate and 0.3 parts of carbolic acid.
[0017] The present invention is further configured such that the modified composite organic amine corrosion inhibitor is prepared by: adding ethanol, sodium bisulfite and salicylaldehyde to a reaction vessel under nitrogen protection, stirring at 300 r / min for 3 hours at 30°C, then adding N,N-dimethylformamide containing hexamethylenetetramine to the reaction vessel, reacting at 150 r / min at room temperature for 3 hours, then adding the reaction liquid to ice water to precipitate the solid, filtering, and vacuum drying to obtain the reactant, adding twice the mass of hexamethylenetetramine to the obtained reactant, and mixing evenly to obtain the final product.
[0018] The present invention is further configured such that step three comprises 99.935% mineral base oil, 0.02% 2,6-di-tert-butyl-p-cresol, 0.03% antioxidant 135, 0.01% dimethyl silicone oil, and 0.005% polyisobutylene bis(succinimide).
[0019] (III) Beneficial Effects
[0020] Compared with the prior art, the present invention provides a method for preparing nuclear power plant coolant, which has the following beneficial effects:
[0021] The environmental issues involved in the application and development of corrosion inhibitors in this invention, in order to meet the needs of sustainable national economic development, necessitate the synthesis and development of novel, highly efficient, low-toxicity, and environmentally friendly corrosion inhibitors based on in-depth research into their mechanisms of action. This invention, through extensive experimental research, has developed a modified composite organic amine corrosion inhibitor that requires low dosage, exhibits excellent corrosion inhibition effects, is easily biodegradable, uses readily available raw materials, and possesses both corrosion inhibition and scale inhibition properties over a wide pH range, achieving a corrosion inhibition efficiency of up to 98.6%. This solves the problems of traditional corrosion inhibitors, such as high dosage, high cost, and unstable corrosion inhibition effects. Furthermore, this invention incorporates sodium lignosulfonate into its anhydrous coolant. Sodium lignosulfonate is a nano-dispersant with surface physicochemical properties such as dispersion, emulsification, solubilization, and adsorption due to its unique structure; its modified products have already seen some application as surfactants. The anhydrous coolant of this invention utilizes nanotechnology, resulting in better cooling and temperature reduction effects, which is beneficial for its widespread use. Attached Figure Description
[0022] Figure 1 This is an overall flow chart of a method for preparing nuclear power plant coolant according to the present invention. Detailed Implementation
[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0025] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.
[0026] Please see Figure 1 A method for preparing nuclear power plant coolant, comprising the following steps:
[0027] Step 1: Preparation of basic materials, including preparation of base fluid, which includes the base oil being made by mixing ethylene glycol, water and 5-sulfosalicylic acid and silicone oil, and also includes mineral base oil, 2,6-di-tert-butyl-p-cresol, antioxidant, dimethyl silicone oil and polyisobutylene bis(succinimide), nonionic dispersant, nanoparticles, corrosion inhibitor and solvent.
[0028] Step 2: Take mineral base oil, add antioxidant, heat and stir until clear and transparent, cool to room temperature, and prepare corrosion inhibitor. The corrosion inhibitor is a modified composite organic amine corrosion inhibitor.
[0029] Step 3: Add antioxidant to the solution obtained in the above steps and stir until completely dissolved. Preparation of modified nanofiller: Mix dimethylacetamide and 5% acetic acid aqueous solution at a mass ratio of 1:45-47, add to the reaction vessel, stir at 200 r / min for 10 min under inert gas protection, let stand for 30 min, then heat to 60-65℃ and stir at 500 r / min for 1-2 hours to obtain a mixture. Add 5.2-5.5% graphene by mass to the mixture, stir at 1000 r / min for 3 hours, let stand for 2 hours, filter, wash with deionized water, and dry to constant weight to obtain modified nanofiller.
[0030] Step 4: Add defoamer to the obtained solution and stir until the reaction is complete; add dispersant to the solution described in the above step and stir until evenly mixed; filter the obtained solution after natural cooling to obtain the coolant; wherein, by mass percentage, simultaneously, under water bath heat preservation, 100-102 parts by weight of base liquid, 3-5 parts by corrosion inhibitor, and 1.2-1.6 parts by weight of modified nanofiller are added to the reaction vessel in sequence, and stirred at 3000 r / min for 2 hours to obtain the coolant.
[0031] In a further embodiment of the present invention, the mineral base oil in step four is 99.90-99.975%, the antioxidant is 0.01-0.04% 2,6-di-tert-butyl-p-cresol and 0.01-0.04% antioxidant 135, the defoamer is 0.001-0.01% dimethyl silicone oil, and the dispersant is 0.004-0.01% polyisobutylene bis(succinimide).
[0032] In a further embodiment of the present invention, step two further includes preparing water and ethylene glycol in a certain proportion at room temperature, placing them in a container, and stirring evenly at 200 rpm for 1 hour until they are mixed evenly.
[0033] In a further embodiment of the present invention, the mass ratio of ethylene glycol to silicone oil in the base solution is 50:5-6, the mass ratio of ethylene glycol to water is 50:80-85, and the mass ratio of ethylene glycol to 5-sulfosalicylic acid is 50:1.2-1.5.
[0034] Example 2:
[0035] A method for preparing nuclear power plant coolant includes the following steps:
[0036] Step 1: Preparation of basic materials, including preparation of base fluid, which includes the base oil being made by mixing ethylene glycol, water and 5-sulfosalicylic acid and silicone oil, and also includes mineral base oil, 2,6-di-tert-butyl-p-cresol, antioxidant, dimethyl silicone oil and polyisobutylene bis(succinimide), nonionic dispersant, nanoparticles, corrosion inhibitor and solvent.
[0037] Step 2: Take mineral base oil, add antioxidant, heat and stir until clear and transparent, cool to room temperature, and prepare corrosion inhibitor. The corrosion inhibitor is a modified composite organic amine corrosion inhibitor.
[0038] Step 3: Add antioxidant to the solution obtained in the above steps and stir until completely dissolved. Preparation of modified nanofiller: Mix dimethylacetamide and 5% acetic acid aqueous solution at a mass ratio of 1:45-47, add to the reaction vessel, stir at 200 r / min for 10 min under inert gas protection, let stand for 30 min, then heat to 60-65℃ and stir at 500 r / min for 1-2 hours to obtain a mixture. Add 5.2-5.5% graphene by mass to the mixture, stir at 1000 r / min for 3 hours, let stand for 2 hours, filter, wash with deionized water, and dry to constant weight to obtain modified nanofiller.
[0039] Step 4: Add defoamer to the obtained solution and stir until the reaction is complete; add dispersant to the solution described in the above step and stir until evenly mixed; filter the obtained solution after natural cooling to obtain the coolant; wherein, by mass percentage, simultaneously, under water bath heat preservation, 100-102 parts by weight of base liquid, 3-5 parts by corrosion inhibitor, and 1.2-1.6 parts by weight of modified nanofiller are added to the reaction vessel in sequence, and stirred at 3000 r / min for 2 hours to obtain the coolant.
[0040] In a further embodiment of the present invention, the antifreeze further includes 45-55 parts of ethylene glycol, 45-55 parts of propylene glycol, 0.2-0.4 parts of benzotriazole, 0.1 parts of ethylparaben, 0.1-0.3 parts of sodium lignosulfonate, and 0.2-0.4 parts of carbolic acid; in the raw materials of the coolant: ethylene glycol and propylene glycol are the mother liquor, benzotriazole is the rust inhibitor, ethylparaben is the preservative, sodium lignosulfonate is the nano-dispersant, and carbolic acid is the bactericide and disinfectant; the above raw materials are used to prepare: 50 parts of ethylene glycol, 50 parts of propylene glycol, 0.3 parts of benzotriazole, 0.1 parts of ethylparaben, 0.2 parts of sodium lignosulfonate, and 0.3 parts of carbolic acid; the modified composite contains The preparation method of the organic amine corrosion inhibitor is as follows: Ethanol, sodium bisulfite, and salicylaldehyde are added to a reaction vessel under nitrogen protection. The mixture is stirred at 300 r / min for 3 hours at 30°C. Then, N,N-dimethylformamide containing hexamethylenetetramine is added to the reaction vessel, and the mixture is reacted at 150 r / min at room temperature for 3 hours. The reaction liquid is then added to ice water, and a solid precipitates. The solid is filtered, vacuum dried, and the reactant is obtained. Twice the mass of hexamethylenetetramine is added to the reactant, and the mixture is thoroughly mixed to obtain the final product. Step three includes 99.935% mineral base oil, 0.02% 2,6-di-tert-butyl-p-cresol, 0.03% antioxidant 135, 0.01% dimethyl silicone oil, and 0.005% polyisobutylene bis(succinimide).
[0041] Other parts of this invention that are not detailed herein are all prior art and will not be described further here.
[0042] In all the solutions mentioned above, for connections between two components, welding, bolt and nut connection, bolt or screw connection, or other known connection methods can be selected according to the actual situation. They will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
[0043] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise specified, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their electrical connection relationships and specific circuit structures will not be elaborated here.
[0044] Of all the solutions mentioned above, those involving motors can be combined with reducers if necessary. The connection structure and working principle between the motor and the reducer are existing known technologies, and will not be elaborated upon in this invention.
Claims
1. A method for preparing nuclear power plant coolant, characterized in that, Includes the following steps: Step 1: Preparation of basic materials, including preparation of base fluid, which includes the base oil being made by mixing ethylene glycol, water and 5-sulfosalicylic acid and silicone oil, and also includes mineral base oil, 2,6-di-tert-butyl-p-cresol, antioxidant, dimethyl silicone oil and polyisobutylene bis(succinimide), nonionic dispersant, nanoparticles, corrosion inhibitor and solvent. Step 2: Take mineral base oil, add antioxidant, heat and stir until clear and transparent, cool to room temperature, and prepare corrosion inhibitor. The corrosion inhibitor is a modified composite organic amine corrosion inhibitor. Step 3: Add antioxidant to the solution obtained in the above steps and stir until completely dissolved. Preparation of modified nanofiller: Mix dimethylacetamide and 5% acetic acid aqueous solution at a mass ratio of 1:45-47, add to the reaction vessel, stir at 200 r / min for 10 min under inert gas protection, let stand for 30 min, then heat to 60-65℃ and stir at 500 r / min for 1-2 hours to obtain a mixture. Add 5.2-5.5% graphene by mass to the mixture, stir at 1000 r / min for 3 hours, let stand for 2 hours, filter, wash with deionized water, and dry to constant weight to obtain modified nanofiller. Step 4: Add defoamer to the obtained solution and stir until the reaction is complete; add dispersant to the solution described in the above step and stir until evenly mixed; filter the obtained solution after natural cooling to obtain the coolant; wherein, by mass percentage, simultaneously, under water bath heat preservation, 100-102 parts by weight of base liquid, 3-5 parts by corrosion inhibitor, and 1.2-1.6 parts by weight of modified nanofiller are added to the reaction vessel in sequence, and stirred at 3000 r / min for 2 hours to obtain the coolant.
2. The method for preparing nuclear power plant coolant according to claim 1, characterized in that: In step four, the mineral base oil is 99.90-99.975%, the antioxidant is 0.01-0.04% 2,6-di-tert-butyl-p-cresol and 0.01-0.04% antioxidant 135, the defoamer is 0.001-0.01% dimethyl silicone oil, and the dispersant is 0.004-0.01% polyisobutylene bis(succinimide).
3. The method for preparing nuclear power plant coolant according to claim 2, characterized in that: Step two also includes preparing water and ethylene glycol in a certain proportion at room temperature, placing them in a container, and stirring evenly at 200 rpm for 1 hour until they are mixed evenly.
4. The method for preparing nuclear power plant coolant according to claim 3, characterized in that: The mass ratio of ethylene glycol to silicone oil in the base solution is 50:5-6, the mass ratio of ethylene glycol to water is 50:80-85, and the mass ratio of ethylene glycol to 5-sulfosalicylic acid is 50:1.2-1.
5.
5. The method for preparing nuclear power plant coolant according to claim 4, characterized in that: The antifreeze also includes 45-55 parts of ethylene glycol, 45-55 parts of propylene glycol, 0.2-0.4 parts of benzotriazole, 0.1 parts of ethylparaben, 0.1-0.3 parts of sodium lignosulfonate, and 0.2-0.4 parts of carbolic acid.
6. The method for preparing nuclear power plant coolant according to claim 1, characterized in that: The coolant raw materials include: ethylene glycol and propylene glycol as mother liquor, benzotriazole as rust inhibitor, ethylparaben as preservative, sodium lignosulfonate as nano-dispersant, and carbolic acid as bactericide and disinfectant.
7. The method for preparing nuclear power plant coolant according to claim 1, characterized in that: The above-mentioned raw materials are used to prepare the following: 50 parts ethylene glycol, 50 parts propylene glycol, 0.3 parts benzotriazole, 0.1 parts ethylparaben, 0.2 parts sodium lignosulfonate, and 0.3 parts carbolic acid.
8. The method for preparing nuclear power plant coolant according to claim 7, characterized in that: The modified composite organic amine corrosion inhibitor is prepared as follows: ethanol, sodium bisulfite, and salicylaldehyde are added to a reaction vessel under nitrogen protection. The mixture is stirred at 300 r / min for 3 hours at 30°C. Then, N,N-dimethylformamide containing hexamethylenetetramine is added to the reaction vessel, and the mixture is reacted at 150 r / min at room temperature for 3 hours. The reaction liquid is then added to ice water, and a solid precipitates. The solid is filtered, vacuum dried, and the reactant is obtained. Twice the mass of hexamethylenetetramine is added to the reactant, and the mixture is stirred evenly to obtain the final product.
9. A method for preparing nuclear power plant coolant according to claim 7, characterized in that: Step three includes 99.935% mineral base oil, 0.02% 2,6-di-tert-butyl-p-cresol, 0.03% antioxidant 135, 0.01% dimethyl silicone oil, and 0.005% polyisobutylene bis(succinimide).