Industrial circulating cooling water treatment corrosion and scale inhibitor and preparation method thereof

Abstract

The invention relates to a corrosion and scale inhibitor for industrial circulating cooling water treatment and a preparation method thereof, in particular to a corrosion and scale inhibitor suitable for treatment of industrial circulating cooling water with different water qualities, and belongs to the technical field of water treatment chemicals. The corrosion and scale inhibitor is composed of an organic phosphoric acid corrosion inhibitor, a bio-based carboxylic acid copolymer, natural polyol, an environment-friendly chelating agent, a dispersant, a corrosion inhibition auxiliary agent and deionized water. In combination with a multi-parameter water quality analysis model, formula self-adaptive adjustment based on indexes such as calcium and magnesium ions, pH value, alkalinity and silicate of the water sample can be realized. The prepared corrosion and scale inhibitor has good compatibility and high efficiency in various typical industrial water systems, the corrosion inhibition rate is larger than or equal to 95%, and the scale inhibition rate is larger than or equal to 95%. The invention provides a green, efficient and broad-spectrum adaptive water treatment solution which is suitable for a circulating cooling water system in the industries of electric power, metallurgy and petrochemical industry.

Description

Technical Field

[0001] The present invention relates to the field of industrial water treatment, and particularly to an industrial circulating cooling water treatment corrosion and scale inhibitor adaptable to different water qualities and a preparation method thereof. Background Art

[0002] Industrial circulating cooling water systems are widely used in fields such as petrochemical, power, metallurgy, pharmaceutical, and papermaking. Their main function is to remove the heat generated by equipment during continuous heat exchange and maintain the temperature stability of equipment operation. Compared with once-through cooling systems, circulating cooling water systems have advantages such as water conservation, energy conservation, and environmental protection. However, during the process of recycling, the water quality is continuously concentrated, which easily leads to a series of problems such as scale deposition, metal corrosion, biological sludge adhesion, and system efficiency decline. In severe cases, it may even cause equipment failures, downtime losses, and increase the operation and maintenance costs of enterprises.

[0003] In order to alleviate the above problems, corrosion inhibitors and scale inhibitors are widely used as chemical treatment agents in circulating cooling water systems. Corrosion inhibitors can form a protective film on the metal surface and inhibit the occurrence of oxidation reactions; scale inhibitors inhibit the deposition of inorganic salts such as calcium carbonate, calcium sulfate, and silicate through complexation, dispersion, lattice distortion, etc. However, in practical applications, traditional corrosion and scale inhibitors face the following key challenges:

[0004] (1) Poor water quality adaptability: The sources of industrial water are complex, including surface water, groundwater, tap water, and even seawater desalination water. There are significant differences in aspects such as pH value, total hardness, alkalinity, dissolved oxygen, COD, TDS, and silicon content among various water sources. A corrosion and scale inhibitor with a single fixed ratio often cannot take into account the treatment effects under different water quality conditions, and problems such as insufficient corrosion inhibition, low scale inhibition efficiency, or secondary pollution are likely to occur.

[0005] (2) Complex formulation system and low synergistic efficiency: To achieve comprehensive corrosion inhibition, scale inhibition, and dispersion effects, multiple functional additives such as polycarboxylic acids, polyols, and chelating agents are usually added to industrial formulations. However, the chemical stability and synergistic efficiency among multiple components are often difficult to control, resulting in problems such as high formulation costs, unstable effects, and strong operation dependence.

[0006] (3) Lack of intelligent dosing method: At present, most enterprises still use empirical methods or standard recommended values to add corrosion and scale inhibitors, lacking a scientific formulation mechanism based on water quality parameter analysis and it is difficult to achieve "formulating agents according to water quality". Especially in complex water qualities such as high silicon, high concentration ratio, and high organic load, the effects of standard formulations are often not ideal, and there is an urgent need to develop a formula matching method driven by water quality parameters. Summary of the Invention

[0007] In view of the above technical problems, the present invention discloses an industrial circulating cooling water treatment corrosion and scale inhibitor, belonging to the technical field of industrial water treatment. The scale and corrosion inhibitor is composed of organic phosphoric acids, bio-based carboxylic acid copolymers, natural polyols, environmentally friendly chelating agents, dispersants, corrosion inhibition aids and deionized water. By reasonably designing the component ratio and synergistic mechanism, the corrosion inhibition and scale inhibition performance are significantly improved. The preparation of the present invention is green and environmentally friendly, safe to use, applicable to various industrial circulating water systems such as power, metallurgy, petrochemical, etc., and has the advantages of flexible formulation, strong adaptability, good corrosion control effect, high scale inhibition rate, etc., filling the technical gap of the lack of a general solution for the formulation of corrosion and scale inhibitors under complex water quality conditions.

[0008] The specific technical solution of the present invention is as follows:

[0009] An industrial circulating cooling water treatment corrosion and scale inhibitor suitable for different water qualities, in percentage by weight, the scale and corrosion inhibitor comprises the following components: 5-20% of organic phosphoric acid corrosion inhibitor, 10%-25% of bio-based carboxylic acid copolymer, 2%-10% of natural polyol, 3%-15% of environmentally friendly chelating agent, 1%-10% of dispersant, 0.5%-5% of corrosion inhibition aid, and deionized water to make up 100%;

[0010] In some embodiments, the organic phosphoric acids may be one or more combinations of amino trimethylene phosphonic acid, 1-hydroxyethylidene-1,1-diphosphonic acid, tetrasodium 1-hydroxyethylidene-1,1-diphosphonate, pentasodium amino trimethylene phosphonate, dipotassium 1-hydroxyethylidene-1,1-diphosphonate.

[0011] In some embodiments, the bio-based carboxylic acid copolymer may be one or more combinations of polyaspartic acid, polyglutamic acid, carboxymethyl chitosan or their copolymer modified products.

[0012] In some embodiments, the environmentally friendly chelating agent may be one or more combinations of ethylenediamine disuccinic acid, sodium citrate, sodium malate.

[0013] In some embodiments, the deionized water is pure water with a conductivity not higher than 5 μS / cm, and the pH value of the 1% by volume aqueous solution of the prepared industrial circulating cooling water treatment corrosion and scale inhibitor is 3.0±1.5, presenting a transparent or light yellow solution.

[0014] The present invention also provides a preparation method of the above industrial circulating cooling water treatment corrosion and scale inhibitor suitable for different water qualities, and the preparation method of the scale and corrosion inhibitor comprises the following steps:

[0015] S1 Weigh each component in sequence according to the said mass percentage;

[0016] S2 Add the organophosphorus corrosion inhibitor to pure water and stir to dissolve it at 25 - 35 °C. Preferably, the temperature conditions are 25 °C, 30 °C, and 35 °C.

[0017] S3 Add the bio - based carboxylic acid copolymer and natural polyol in sequence and stir for 30 - 40 min. Preferably, the stirring time is 30 min, 35 min, and 40 min.

[0018] S4 Continuously add the environment - friendly chelating agent and dispersant in sequence and stir evenly.

[0019] S5 Add the corrosion inhibition auxiliary agent, adjust the pH value of the 1% aqueous solution by volume percentage to 1.5 - 4.5, and filter to remove impurities to obtain the finished product.

[0020] The present invention also provides an application method of the above - mentioned corrosion and scale inhibitor for industrial circulating cooling water treatment adapting to different water qualities. The application method of the corrosion and scale inhibitor includes the following steps:

[0021] S6 Detect the main indicators in the circulating cooling water of the target system: Ca 2+ 、Mg 2+ 、pH value, total alkalinity, silicate, TDS, COD to classify the water quality.

[0022] S7 Input the detection data into the formula decision system and obtain the recommended value of the component ratio according to the multi - parameter fitting model.

[0023] S8 Prepare the matching formula according to the ratio range and steps listed in Claim 1.

[0024] In some of the embodiments, the water quality types in S6 are classified into the following five categories: high hardness and high alkalinity type, low hardness and high silicon type, high organic load type, seawater desalination type, high concentration ratio type. Preset the template ratios and can be adjusted adaptively.

[0025] In some of the embodiments, add the corrosion and scale inhibitor prepared according to Claim 1 to the circulating water system at a concentration of 30 - 50 mg / L, and maintain the operating pH value of the system at 7 - 9. Preferably, the concentration of the scale inhibitor added is 30 mg / L, 40 mg / L, 50 mg / L, and the system pH value is maintained at 7.5, 8.0, 9.0.

[0026] In some of the embodiments, this treatment method is applicable to industries such as steel, petrochemical, power, paper, pharmaceutical, and fertilizer. Its corrosion rate can be controlled below 0.075 mm / a, and the decline in the heat exchanger efficiency does not exceed 5%.

[0027] Different from the prior art, the present invention has the following advantages:

[0028] 1. Strong water quality adaptability: The formulation components can be flexibly adjusted according to key parameters such as calcium and magnesium ions, pH value, alkalinity, TDS, and silicate in circulating water, and are applicable to various complex water qualities such as surface water, groundwater, and seawater desalination water, ensuring stable and reliable corrosion and scale inhibition effects.

[0029] 2. Green, environmentally friendly, safe and non-toxic: The selected organic phosphoric acid, bio-based copolymer, natural polyol, and biodegradable chelating agent are all low-toxic or non-toxic environmental protection materials, meeting the current environmental protection requirements of industrial water treatment for low phosphorus, chromium-free, zinc-free, and biodegradable.

[0030] 3. Synergistic, efficient and cost controllable: Multifunctional components work together to play roles such as corrosion inhibition, scale inhibition, dispersion, and corrosion inhibition. The comprehensive treatment performance is excellent, the dosage of the agent is low, and the stability is strong. It is suitable for large-scale industrial applications and has good economic efficiency and promotion value. Specific implementation mode

[0031] In order to more conveniently understand the technical implementation method of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the technical process steps, specific implementation conditions and materials in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0032] Industrial circulating cooling water systems are widely used in fields such as petrochemical and power industries. By circulating heat exchange, they maintain the temperature stability of equipment and have the advantages of water saving and energy saving. However, the circulating use leads to water quality concentration, which easily causes problems such as scaling, corrosion, and microbial growth, affecting the system efficiency and increasing the operation and maintenance costs. Corrosion inhibitors and scale inhibitors can inhibit metal corrosion and inorganic salt deposition, but traditional agents face problems such as poor water quality adaptability, low multi-component synergistic efficiency, and dependence on empirical dosing. The pH, hardness, silicon content, etc. of different water sources (such as surface water, groundwater, etc.) vary significantly, and it is difficult for agents with fixed formulations to take into account various water quality conditions, easily resulting in unstable treatment effects. In addition, it is difficult to optimize the synergistic effects of each component in complex formulations, and there is a lack of intelligent dispensing methods based on real-time water quality data. There is an urgent need to develop precise and intelligent corrosion and scale inhibition technologies to cope with complex working conditions such as high concentration ratios and high organic loads. Therefore, the research and development of a green, environmentally friendly, corrosion and scale inhibitor with clear components, good adaptability to various water qualities, and capable of optimizing the ratio in combination with water quality parameters has become an important research direction in the field of industrial water treatment. In recent years, green raw materials such as bio-based polymers, polycarboxylic acid copolymers, and biodegradable chelating agents have gradually been introduced into the formulation system; at the same time, means such as artificial intelligence, water quality sensing and big data analysis have also provided new ideas for the personalization and intelligence of corrosion and scale inhibitor formulations.

[0033] It should be noted that the deionized water used in the specific embodiments of the present invention is pure water with a conductivity not higher than 5 μS / cm.

[0034] Example 1: Composition of an inhibitor and scale inhibitor for industrial circulating cooling water treatment (suitable for high-hardness and high-alkalinity water quality):

[0035]

[0036] Preparation steps:

[0037] Add deionized water to the reaction kettle and start stirring; slowly add tetrasodium 1-hydroxyethylidene-1,1-diphosphonate (HEDP·Na4) and polyacrylic acid in sequence, and stir evenly; then add polyaspartic acid, sodium EDTA, and sorbitol in sequence, and stir until completely dissolved; finally, add bentonite and stir for 15 minutes, adjust the pH value of the 1% aqueous solution by volume percentage to 1.5 - 4.5, and filter to obtain the finished product of the inhibitor and scale inhibitor for industrial circulating cooling water treatment.

[0038] Performance verification:

[0039] The simulated experiment uses groundwater sampled from an industrial park in a certain city, with a hardness of 750 mg / L (calculated as CaCO3), a TDS of 1200 mg / L, and a pH value of 8.2. In a dynamic simulated circulating cooling system, a control group (without adding treatment agent) and a treatment group (adding the inhibitor and scale inhibitor of this example, with a dosage of 40 mg / L) are set respectively. After running continuously for 7 days, the corrosion inhibition performance and scale inhibition performance are detected. The corrosion inhibition performance is detected according to the method in GB / T 18175 - 2014, and the scale inhibition performance is detected according to the method in GB / T 16632 - 2019.

[0040] 1. Corrosion inhibition performance test:

[0041] 1.1. Pretreatment of test pieces: Wipe the rust-preventive grease on the test pieces with filter paper, then scrub them with absorbent cotton in acetone and absolute ethanol respectively. For every ten test pieces, no less than 50 mL of the above reagents are used. After scrubbing clean, dry them with filter paper, place them in a dryer for 4 hours, weigh (accurate to 0.2 mg), and store them in a dryer for later use.

[0042] 1.2. Stock solution of water treatment agent: Prepare the stock solution of water treatment agent according to the experimental requirements. The concentration of the stock solution is generally about 200 - 500 times the operating concentration. The stock solution should be prepared on the same day.

[0043] 1.3 Test water sample: The test water sample can be field water, prepared water, or recommended standard prepared water.

[0044] 1.4 Test solution: Calculate the addition amount of the water treatment agent stock solution according to the addition concentration of the water treatment agent in the test solution. Add the water treatment agent stock solution to the test cup, accurate to 0.02 mL. Add the test water sample to a certain volume in a 2000 mL test cup and mix well, which is the test solution. Draw a liquid level scale line on the outer wall of the test cup.

[0045] 1.5 Aeration: If the aeration test is adopted, place the test cup in a constant temperature water bath and continuously introduce air into each cup.

[0046] 1.6 Hanging the test piece and rotation test: When the test solution reaches the specified temperature, hang the test piece for the test, start the rotation system, and make the test piece rotate at the specified rotation speed. Start timing the test.

[0047] 1.7 Make up water for the test solution: According to the test situation, timely add the test water sample or water to keep the liquid level at the scale line.

[0048] 1.8 Stop the rotation test: When the specified time is reached, stop the rotation test, take out the test piece and conduct appearance observation and record.

[0049] 1.9 Post-treatment of carbon steel test piece: Brush the test piece clean with a brush, then clean it in the pickling solution for about 30 s, take it out, quickly rinse it with tap water, immediately immerse it in the sodium hydroxide solution for about 30 s, take it out, rinse it with water, wipe it with filter paper and dry it, soak it in anhydrous ethanol for about 3 min, place it on a clean filter paper, dry it with filter paper, place it in a desiccator for more than 4 h, and weigh (accurate to 0.2 mg). At the same time, conduct a pickling blank test on the test piece to correct the pickling weight loss. Other material test pieces adopt corresponding treatment methods.

[0050] 1.10 Blank test: Conduct a blank test without adding the water treatment agent.

[0051] 1.11 Observation of the pickled test piece: Conduct appearance observation and record on the pickled test piece.

[0052] 2 Scale inhibition performance test:

[0053] 2.1 Water treatment agent sample solution: 1.00 mL contains 0.500 mg of water treatment agent (based on dry basis)

[0054] 2.2 Water for actual working conditions: Add 250 mL of the test water sample to a 500 mL volumetric flask, add a certain amount of the water treatment agent sample solution with a pipette, shake well. Dilute it to the scale with water and shake well.

[0055] 2.3 Preparation of water sample: Add 250 mL of water into a 500 mL volumetric flask. Add a certain volume of calcium chloride standard solution with a burette to make the amount of calcium ions 120 mg. Add a certain amount of water treatment agent sample solution with a pipette, and shake well. Then add 20 mL of borax buffer solution and shake well. Slowly add a certain volume of sodium bicarbonate standard solution with a burette (while shaking), to make the amount of bicarbonate ions 366 mg, dilute with water to the mark, and shake well.

[0056] 2.4 Preparation of blank test solution: In another 500 mL volumetric flask, operate according to steps 1.2 or 1.3 above except without adding the water treatment agent sample solution.

[0057] The results show that the corrosion rate of the treatment group is 0.045 mm / a and the scale inhibition rate is 95.2%, far superior to the performance of the control group (corrosion rate 0.136 mm / a, scale inhibition rate 80%), proving its good corrosion inhibition and scale inhibition performance in high-hardness water environment.

[0058] Example 2: An industrial circulating cooling water treatment corrosion and scale inhibitor (suitable for high organic load type)

[0059] Formulation composition:

[0060]

[0061] Preparation steps:

[0062] Dissolve each organic phosphate and polycarboxylate in deionized water respectively. After stirring evenly, add sodium citrate and sorbitol; after fully stirring, add bentonite, and finally adjust the pH value of the 1% aqueous solution by volume to 1.8. Filter and store.

[0063] Performance verification: In this experiment, water was taken from a large reservoir (surface water), with TDS of 310 mg / L, low hardness, only 85 mg / L (calculated as CaCO3), TOC (total organic carbon) of 5.5 mg / L, and pH value of 7.3. According to GB / T 18175-2014 of the national standard, the corrosion inhibition performance of the water treatment agent was detected, and according to GB / T 16632-2019 of the national standard, the scale inhibition performance of the water treatment agent was detected. The test was divided into a blank group and a test solution group. The specific detection steps are as follows:

[0064] 1 Corrosion inhibition performance test:

[0065] 1.1 Pretreatment of test pieces: Wipe the rust-preventive grease on the test pieces with filter paper, and then scrub them with absorbent cotton in acetone and absolute ethanol respectively. For every ten test pieces, no less than 50 mL of the above reagents are used. After scrubbing clean, dry them with filter paper, place them in a desiccator for 4 h, weigh (accurate to 0.2 mg), and store them in a desiccator for later use.

[0066] 1.2 Water treatment agent stock solution: Prepare the water treatment agent stock solution according to the experimental requirements. The concentration of the stock solution is generally about 200 to 500 times the operating concentration. The stock solution should be prepared on the same day.

[0067] 1.3 Test water sample: The test water sample can be field water, prepared water or recommended standard prepared water.

[0068] 1.4 Test solution: Calculate the amount of water treatment agent stock solution to be added according to the dosing concentration of the water treatment agent in the test solution. Add the water treatment agent stock solution to the test cup, accurate to 0.02 mL. Add the test water sample to a certain volume in a 2000 mL test cup and mix well to obtain the test solution. Draw a liquid level scale line on the outer wall of the test cup.

[0069] 1.5 Aeration: If an aeration test is adopted, place the test cup in a constant temperature water bath and continuously introduce air into each cup.

[0070] 1.6 Hanging test pieces and rotation test: When the test solution reaches the specified temperature, hang the test pieces for the test, start the rotation system, and make the test pieces rotate at the specified rotation speed. Start timing the test.

[0071] 1.7 Make-up water for the test solution: Add the test water sample or water in a timely manner according to the test situation to keep the liquid level at the scale line.

[0072] 1.8 Stop the rotation test: When the specified time is reached, stop the rotation test, take out the test pieces and conduct appearance observation and record.

[0073] 1.9 Post-treatment of carbon steel test pieces: Brush the test pieces clean with a brush, then clean them in the pickling solution for about 30 s, take them out, quickly rinse them with tap water, immediately immerse them in the sodium hydroxide solution for about 30 s, take them out, rinse them with water, wipe and dry them with filter paper, soak them in anhydrous ethanol for about 3 min, place them on a clean filter paper, dry them with filter paper, place them in a desiccator for more than 4 h, and weigh (accurate to 0.2 mg). At the same time, conduct a pickling blank test on the test pieces to correct the pickling weight loss. Use corresponding treatment methods for test pieces of other materials.

[0074] 1.10 Blank test: Conduct a blank test without adding the water treatment agent.

[0075] 1.11 Observation of pickled test pieces: Conduct appearance observation and record of the pickled test pieces.

[0076] 2 Scale inhibition performance test:

[0077] 2.1 Water treatment agent sample solution: 1.00 mL contains 0.500 mg of water treatment agent (based on dry basis)

[0078] 2.2 Water consumption under actual working conditions: Add 250 mL of test water sample into a 500 mL volumetric flask, add a certain amount of the water treatment agent sample solution with a pipette, and shake well. Dilute with water to the mark and shake well.

[0079] 2.3 Prepared water: Add 250 mL of water into a 500 mL volumetric flask, add a certain volume of calcium chloride standard solution with a burette so that the amount of calcium ions is 120 mg. Add a certain amount of the water treatment agent sample solution with a pipette and shake well. Then add 20 mL of borax buffer solution and shake well. Slowly add a certain volume of sodium bicarbonate standard solution with a burette (shake while adding) so that the amount of bicarbonate ions is 366 mg, and dilute with water to the mark and shake well.

[0080] 2.4 Preparation of blank test solution: In another 500 mL volumetric flask, operate according to steps 1.2 or 1.3 above except without adding the water treatment agent sample solution.

[0081] The results are as follows:

[0082] The results show that the corrosion rate of the test solution group is 0.023 mm / a and the scale inhibition efficiency is 95.8%, which is better than the performance of the control group (corrosion rate 0.231 mm / a, scale inhibition efficiency 78.8%), proving its good corrosion inhibition and scale inhibition performance in high-hardness water environment.

[0083] This example shows that the corrosion inhibitor and scale inhibitor still has significant effects under the conditions of low hardness and high organic matter surface water, and has both corrosion inhibition and scale inhibition capabilities, and is suitable for cooling water systems such as lake water intake, urban surface water reuse, and industrial wastewater reuse.

[0084] Example 3: Composition of an industrial circulating cooling water treatment corrosion inhibitor and scale inhibitor (suitable for high-hardness and high-alkalinity water quality):

[0085]

[0086] Preparation steps:

[0087] Under stirring conditions, add each component into deionized water in turn, keep the temperature constant at 30 °C and react for 30 min; slowly add bentonite, adjust the pH value to 3.0, filter and store.

[0088] Experimental verification:

[0089] Source of experimental water sample: Recirculating makeup water from a steel plant, after desulfurization treatment, the pH value is 9.2, the calcium ion concentration is 220 mg / L, the alkalinity is 320 mg / L (calculated as CaCO3), the total hardness is 430 mg / L, and the TDS is 1120 mg / L, with a strong scaling risk.

[0090] The corrosion inhibition performance of water treatment agents is detected according to the national standard GB / T 18175-2014, and the scale inhibition performance of water treatment agents is detected according to the national standard GB / T 16632-2019. The test is divided into a blank group and a test solution group. The specific detection steps are as follows:

[0091] 1 Corrosion inhibition performance test:

[0092] 1.1 Pretreatment of test pieces: Wipe the anti-rust grease on the test pieces with filter paper, then scrub them with absorbent cotton in acetone and absolute ethanol respectively. Each 10 test pieces use no less than 50 mL of the above reagents. After scrubbing clean, dry them with filter paper, place them in a desiccator for 4 h, weigh (accurate to 0.2 mg), and store them in a desiccator for later use.

[0093] 1.2 Stock solution of water treatment agent: Prepare the stock solution of water treatment agent according to the experimental requirements. The concentration of the stock solution is generally about 200-500 times the operating concentration. The stock solution should be prepared on the same day.

[0094] 1.3 Test water samples: The test water samples can be field water, prepared water or recommended standard prepared water.

[0095] 1.4 Test solution: Calculate the amount of water treatment agent stock solution to be added according to the dosing concentration of the water treatment agent in the test solution. Add the water treatment agent stock solution to the test cup, accurate to 0.02 mL. Add the test water sample to a certain volume in a 2000 mL test cup, mix well, and it is the test solution. Draw a liquid level scale line on the outer wall of the test cup.

[0096] 1.5 Aeration: If an aeration test is adopted, place the test cup in a constant temperature water bath and continuously introduce air into each cup.

[0097] 1.6 Hanging test pieces and rotation test: When the test solution reaches the specified temperature, hang the test pieces for the test, start the rotation system, and make the test pieces rotate at the specified rotation speed. Start timing the test.

[0098] 1.7 Make-up water for test solution: According to the test situation, add the test water sample or water in a timely manner to keep the liquid level at the scale line.

[0099] 1.8 Stop the rotation test: When the specified time is reached, stop the rotation test, take out the test pieces and observe and record their appearance.

[0100] 1.9 Post-treatment of carbon steel test pieces: Scrub the test pieces clean with a brush, then clean them in the pickling solution for about 30 s, take them out, quickly rinse them with tap water, immediately immerse them in the sodium hydroxide solution for about 30 s, take them out, rinse them with water, wipe and dry them with filter paper, soak them in absolute ethanol for about 3 min, place them on a clean filter paper, dry them with filter paper, place them in a desiccator for more than 4 h, and weigh (accurate to 0.2 mg). At the same time, conduct a pickling blank test on the test pieces to correct the pickling weight loss. Use corresponding treatment methods for test pieces of other materials.

[0101] 1.10 Blank test: Conduct a blank test without adding the water treatment agent.

[0102] 1.11 Observation of the test piece after pickling: Observe and record the appearance of the test piece after pickling.

[0103] 2 Scale inhibition performance test:

[0104] 2.1 Water treatment agent sample solution: 1.00 mL contains 0.500 mg of water treatment agent (calculated on dry basis)

[0105] 2.2 Water for actual working conditions: Add 250 mL of test water sample into a 500 mL volumetric flask, add a certain amount of water treatment agent sample solution with a pipette, and shake well. Dilute to the mark with water and shake well.

[0106] 2.3 Prepared water: Add 250 mL of water into a 500 mL volumetric flask, add a certain volume of calcium chloride standard solution with a burette so that the amount of calcium ions is 120 mg. Add a certain amount of water treatment agent sample solution with a pipette and shake well. Then add 20 mL of borax buffer solution and shake well. Slowly add a certain volume of sodium bicarbonate standard solution with a burette (while shaking) so that the amount of bicarbonate ions is 366 mg, and dilute to the mark with water and shake well.

[0107] 2.4 Preparation of blank test solution: In another 500 mL volumetric flask, operate according to step 1.2 or 1.3 above except without adding the water treatment agent sample solution.

[0108] The results are as follows:

[0109] The results show that the corrosion rate of the test solution group is 0.013 mm / a, and the scale formation rate is lower than 0.46 g / m 2 ·d, which is better than the performance of the control group (corrosion rate 0.86 mm / a, scale formation rate 1.86 g / m 2 ·d), proving its good corrosion inhibition and scale inhibition performance in high-hardness water environment.

[0110] Application suggestions: It is applicable to the circulating cooling system with groundwater, high-alkaline surface water or boiler softened drainage as the makeup water source, such as industries like power plants, steel plants, glass manufacturing, fertilizer plants, etc., and is especially applicable to the alkaline water source conditions in southern karst areas.

[0111] Example 4: The formulation composition of an industrial circulating cooling water treatment corrosion inhibitor and scale inhibitor (applicable to high-concentration ratio type water quality):

[0112]

[0113] Preparation steps: Add deionized water to the reaction vessel and start stirring; sequentially add ATMP·Na5 and polyurethane and stir until dissolved; add glycerol and polyacrylic acid and stir for 30 min; add bentonite and continue stirring; adjust the pH value of the aqueous solution with a volume percentage of 1% to 4.5, and filter to obtain the reagent solution.

[0114] Performance verification: In the simulation experiment, the recycled water from the circulating cooling of an electronic manufacturing enterprise (with a chloride ion content as high as 350 mg / L and a total hardness of 580 mg / L) was used. A cooling tower simulation system was set up on the experimental bench, and the dosing amount was 120 mg / L, and it was continuously operated for 10 days.

[0115] According to the national standard GB / T 18175-2014, the corrosion inhibition performance of the water treatment agent was detected, and according to the national standard GB / T 16632-2019, the scale inhibition performance of the water treatment agent was detected. The test was divided into a blank group and a test solution group. The specific detection steps were as follows:

[0116] 1 Corrosion inhibition performance test:

[0117] 1.1 Pretreatment of test pieces: Wipe the rust-preventive grease on the test pieces with filter paper, and then scrub them with absorbent cotton in acetone and absolute ethanol respectively. Each set of ten test pieces uses no less than 50 mL of the above reagents. After scrubbing clean, dry them with filter paper, place them in a desiccator for 4 h, weigh (accurate to 0.2 mg), and store them in a desiccator for later use.

[0118] 1.2 Stock solution of water treatment agent: Prepare the stock solution of the water treatment agent according to the experimental requirements. The concentration of the stock solution is generally about 200-500 times the operating concentration. The stock solution should be prepared on the same day.

[0119] 1.3 Test water sample: The test water sample can be field water, prepared water or recommended standard prepared water.

[0120] 1.4 Test solution: Calculate the addition amount of the stock solution of the water treatment agent according to the dosing concentration of the water treatment agent in the test solution. Add the stock solution of the water treatment agent to the test cup, accurate to 0.02 mL, and add the test water sample to a certain volume in a 2000 mL test cup, and mix well to obtain the test solution. Draw a liquid level scale line on the outer wall of the test cup.

[0121] 1.5 Aeration: If an aeration test is adopted, place the test cup in a constant temperature water bath and continuously introduce air into each cup.

[0122] 1.6 Hang the test pieces and start the rotation test: When the test solution reaches the specified temperature, hang the test pieces for the test, start the rotation system, and make the test pieces rotate at the specified rotation speed, and start timing the test.

[0123] 1.7 Make up the test solution: According to the test situation, timely add the test water sample or water to keep the liquid level at the scale line.

[0124] 1.8 Stopping rotation test: When the specified time is reached, stop the rotation test, take out the test piece, and conduct appearance observation and record.

[0125] 1.9 Post-treatment of carbon steel test piece: Brush the test piece clean with a brush, then clean it in the pickling solution for about 30 s, take it out, quickly rinse it with tap water, immediately immerse it in the sodium hydroxide solution for about 30 s, take it out, rinse it with water, wipe and dry it with filter paper, soak it in absolute ethanol for about 3 min, place it on a clean filter paper, dry it with filter paper, place it in a dryer for more than 4 h, and weigh (accurate to 0.2 mg). At the same time, conduct a pickling blank test on the test piece to correct the pickling weight loss. Use corresponding treatment methods for test pieces of other materials.

[0126] 1.10 Blank test: Conduct a blank test without adding the water treatment agent.

[0127] 1.11 Observation of the pickled test piece: Conduct appearance observation and record of the pickled test piece.

[0128] 2 Scale inhibition performance test:

[0129] 2.1 Water treatment agent sample solution: 1.00 mL contains 0.500 mg of water treatment agent (calculated on dry basis)

[0130] 2.2 Water for actual working conditions: Add 250 mL of test water sample to a 500 mL volumetric flask, add a certain amount of water treatment agent sample solution with a pipette, and shake well. Dilute it to the scale with water and shake well.

[0131] 2.3 Prepared water: Add 250 mL of water to a 500 mL volumetric flask, add a certain volume of calcium chloride standard solution with a burette so that the amount of calcium ions is 120 mg. Add a certain amount of water treatment agent sample solution with a pipette and shake well. Then add 20 mL of borax buffer solution and shake well. Slowly add a certain volume of sodium bicarbonate standard solution with a burette (shake while adding) so that the amount of bicarbonate ions is 366 mg, and dilute it to the scale with water and shake well.

[0132] 2.4 Preparation of blank test solution: In another 500 mL volumetric flask, operate according to the above steps 1.2 or 1.3 except without adding the water treatment agent sample solution.

[0133] The results are as follows:

[0134] The results show that the corrosion rate of the test solution group is 0.018 mm / a, and the scale inhibition rate is 95.7%, which is better than the performance of the control group ((corrosion rate 0.133 mm / a, scale inhibition rate 80.5%)), proving that it has good corrosion inhibition and scale inhibition performance in high-hardness water environment.

[0135] Result analysis: It is applicable to surface water cooling systems with large water quality fluctuations and has a certain ability to resist interference from suspended solids. It is applicable to high-temperature working conditions and has excellent thermal stability and corrosion protection ability.

[0136] Example 5: An industrial circulating cooling water treatment corrosion and scale inhibitor (applicable to high-hardness and high-alkalinity water quality)

[0137] This example provides a corrosion and scale inhibitor composition applicable to the circulating water system of urban water supply cooling towers, and its ratio and performance are specially designed.

[0138] Formulation composition:

[0139]

[0140]

[0141] Preparation steps:

[0142] Take deionized water and place it in a reactor for stirring; add HEDP·Na4 and polyaspartic acid and stir for 30 min; add glycerol, polyamino acid and EDTA·Na4; add bentonite corrosion inhibitor additive and continue stirring; adjust the pH value to 3.2 and filter to obtain the finished product.

[0143] Performance verification:

[0144] Experimental device: Adopt a cooling tower circulating water system (500 L circulating water tank, heat exchanger and cooling tower model) under simulated urban water supply conditions. Test water quality: Use tap water from the Wuhan water supply system as the basic water source, and simulate the cooling process through heating and aeration.

[0145] Source of experimental water sample: Circulating make-up water from a steel plant, with a pH value of 7.9, a calcium ion concentration of 220 mg / L, an alkalinity of 320 mg / L (calculated as CaCO3), a total hardness of 430 mg / L, and a TDS of 1120 mg / L, with a strong scaling risk.

[0146] According to GB / T 18175-2014 of the national standard, detect the corrosion inhibition performance of the water treatment agent, and according to GB / T 16632-2019 of the national standard, detect the scale inhibition performance of the water treatment agent. The test is divided into a blank group and a test solution group. The specific detection steps are as follows:

[0147] 1 Corrosion inhibition performance test:

[0148] 1.1 Pretreatment of test pieces: Wipe the rust-preventive grease on the test pieces with filter paper, then scrub them with absorbent cotton in acetone and absolute ethanol respectively. For every ten test pieces, use no less than 50 mL of the above reagents. After scrubbing clean, dry them with filter paper, place them in a desiccator for 4 h, weigh (accurate to 0.2 mg), and store them in a desiccator for later use.

[0149] 1.2 Water treatment agent stock solution: Prepare the water treatment agent stock solution according to the experimental requirements. The concentration of the stock solution is generally about 200 - 500 times the operating concentration. The stock solution should be prepared on the same day.

[0150] 1.3 Test water sample: The test water sample can be field water, prepared water, or the recommended standard prepared water.

[0151] 1.4 Test solution: Calculate the amount of water treatment agent stock solution to be added according to the dosing concentration of the water treatment agent in the test solution. Add the water treatment agent stock solution to the test cup, accurate to 0.02 mL. Add the test water sample to a certain volume in a 2000 mL test cup and mix well to obtain the test solution. Draw a liquid level scale line on the outer wall of the test cup.

[0152] 1.5 Aeration: If an aeration test is adopted, place the test cup in a constant temperature water bath and continuously introduce air into each cup.

[0153] 1.6 Hang the test piece and start the rotation test: When the test solution reaches the specified temperature, hang the test piece for the test, start the rotation system, and make the test piece rotate at the specified rotation speed. Start timing the test.

[0154] 1.7 Make up the test solution: According to the test situation, timely add the test water sample or water to keep the liquid level at the scale line.

[0155] 1.8 Stop the rotation test: When the specified time is reached, stop the rotation test, take out the test piece and conduct an appearance observation and record.

[0156] 1.9 Post - treatment of carbon steel test piece: Brush the test piece clean with a brush, then clean it in the pickling solution for about 30 s, take it out, quickly rinse it with tap water, immediately immerse it in the sodium hydroxide solution for about 30 s, take it out, rinse it with water, wipe it with a filter paper and dry it. Immerse it in anhydrous ethanol for about 3 min, place it on a clean filter paper, dry it with a filter paper, place it in a desiccator for more than 4 h, and weigh it (accurate to 0.2 mg). At the same time, conduct a pickling blank test on the test piece to correct the pickling weight loss. Use corresponding treatment methods for test pieces of other materials.

[0157] 1.10 Blank test: Conduct a blank test without adding the water treatment agent.

[0158] 1.11 Observation of the pickled test piece: Conduct an appearance observation and record of the pickled test piece.

[0159] 2 Scale inhibition performance test:

[0160] 2.1 Water treatment agent sample solution: 1.00 mL contains 0.500 mg of water treatment agent (based on dry basis)

[0161] 2.2 Water consumption under actual working conditions: Add 250 mL of the test water sample into a 500 mL volumetric flask, add a certain amount of the water treatment agent sample solution with a pipette, and shake well. Dilute with water to the mark and shake well.

[0162] 2.3 Prepared water: Add 250 mL of water into a 500 mL volumetric flask, add a certain volume of calcium chloride standard solution with a burette so that the amount of calcium ions is 120 mg. Add a certain amount of the water treatment agent sample solution with a pipette and shake well. Then add 20 mL of borax buffer solution and shake well. Slowly add a certain volume of sodium bicarbonate standard solution with a burette (while shaking) so that the amount of bicarbonate ions is 366 mg, and dilute with water to the mark and shake well.

[0163] 2.4 Preparation of blank test solution: In another 500 mL volumetric flask, operate according to steps 1.2 or 1.3 above except without adding the water treatment agent sample solution.

[0164] The results are as follows:

[0165] The results show that the corrosion rate of the test solution group is 0.018 mm / a, and the scale inhibition rate is 96.1%, which is better than the performance of the control group (corrosion rate 0.167 mm / a, scale inhibition rate 82%), proving that it has good corrosion inhibition and scale inhibition performance in high-hardness and high-alkalinity water environments.

[0166] The results show that:

[0167] The corrosion inhibitor and scale inhibitor for industrial circulating cooling water provided in this embodiment is applicable to high-hardness and high-alkalinity water quality and can be widely used in civil or industrial cooling towers.

[0168] Example 6: A corrosion inhibitor and scale inhibitor for industrial circulating cooling water (applicable to low-hardness and high-silica water quality)

[0169] Applicable scenarios and background:

[0170] A large amount of circulating cooling water is used in the process of electronic semiconductor manufacturing, which has extremely high requirements for the cleanliness, ion control, and corrosion inhibition of the cooling water. This type of water body is mostly soft water or ultrapure water after purification treatment, with stable water quality but is extremely prone to corrosion or scaling problems caused by trace metal ions or pH fluctuations. This embodiment provides a pharmaceutical formulation with low ions, low impurities, stable formulation, and dual functions of corrosion inhibition and scale inhibition, which is applicable to cooling towers, air-cooled coolers, and related circulating systems in semiconductor factories.

[0171]

[0172] Experimental verification: Verify the corrosion inhibition and scale inhibition performance of the formulation under simulated electronic semiconductor circulating water conditions.

[0173] Experimental condition settings: Water quality simulation parameters: Conductivity: < 100 μS / cm; Ca 2+ concentration: 30 mg / L; HCO3 - : 40 mg / L; pH value: 7.8 - 9.0; Test temperature: 30 °C.

[0174] The corrosion inhibition performance of water treatment agents was detected according to GB / T 18175 - 2014, and the scale inhibition performance of water treatment agents was detected according to GB / T 16632 - 2019. The test was divided into a blank group and a test solution group. The specific detection steps are as follows:

[0175] 1 Corrosion inhibition performance test:

[0176] 1.1 Pretreatment of test pieces: Wipe the rust-preventive grease on the test pieces with filter paper, then scrub them with absorbent cotton in acetone and absolute ethanol respectively. Each 50 mL of the above reagents should be used for every ten test pieces. After scrubbing clean, dry them with filter paper, place them in a desiccator for 4 h, weigh (accurate to 0.2 mg), and store them in a desiccator for later use.

[0177] 1.2 Stock solution of water treatment agent: Prepare the stock solution of water treatment agent according to the experimental requirements. The concentration of the stock solution is generally about 200 - 500 times the operating concentration. The stock solution should be prepared on the same day.

[0178] 1.3 Test water samples: The test water samples can be field water, prepared water or recommended standard prepared water.

[0179] 1.4 Test solution: Calculate the amount of water treatment agent stock solution to be added according to the dosing concentration of the water treatment agent in the test solution. Add the water treatment agent stock solution to the test cup, accurate to 0.02 mL. Add the test water sample to a certain volume in a 2000 mL test cup and mix well to obtain the test solution. Draw a liquid level scale line on the outer wall of the test cup.

[0180] 1.5 Aeration: If an aeration test is adopted, place the test cup in a constant temperature water bath and continuously introduce air into each cup.

[0181] 1.6 Hanging test pieces and rotation test: When the test solution reaches the specified temperature, hang the test pieces for the test, start the rotation system, and make the test pieces rotate at the specified rotation speed. Start timing the test.

[0182] 1.7 Make-up of test solution: According to the test situation, timely add the test water sample or water to keep the liquid level at the scale line.

[0183] 1.8 Stop the rotation test: When the specified time is reached, stop the rotation test, take out the test pieces and conduct appearance observation and recording.

[0184] 1.9 Post-treatment of carbon steel specimens: Clean the specimens with a brush, then wash them in the pickling solution for about 30 s. Take them out, quickly rinse with tap water, immediately immerse them in the sodium hydroxide solution for about 30 s, take them out, rinse with water, wipe and dry with filter paper, soak them in absolute ethanol for about 3 min, place them on a clean filter paper, dry with filter paper, place them in a desiccator for more than 4 h, and weigh (accurate to 0.2 mg). At the same time, conduct a pickling blank test on the specimens to correct the pickling weight loss. Use corresponding treatment methods for specimens of other materials.

[0185] 1.10 Blank test: Conduct a blank test without adding the water treatment agent.

[0186] 1.11 Observation of pickled specimens: Observe and record the appearance of the pickled specimens.

[0187] 2 Scale inhibition performance test:

[0188] 2.1 Water treatment agent sample solution: 1.00 mL contains 0.500 mg of water treatment agent (based on dry basis)

[0189] 2.2 Water for actual working conditions: Add 250 mL of test water sample to a 500 mL volumetric flask, add a certain amount of water treatment agent sample solution with a pipette, and shake well. Dilute to the mark with water and shake well.

[0190] 2.3 Prepared water: Add 250 mL of water to a 500 mL volumetric flask, add a certain volume of calcium chloride standard solution with a burette so that the amount of calcium ions is 120 mg. Add a certain amount of water treatment agent sample solution with a pipette and shake well. Then add 20 mL of borax buffer solution and shake well. Slowly add a certain volume of sodium bicarbonate standard solution with a burette (while shaking) so that the amount of bicarbonate ions is 366 mg, dilute to the mark with water and shake well.

[0191] 2.4 Preparation of blank test solution: In another 500 mL volumetric flask, operate according to steps 1.2 or 1.3 above except without adding the water treatment agent sample solution.

[0192] The results are as follows:

[0193] The results show that the corrosion rate of the test solution group is 0.018 mm / a, and the scale inhibition rate is 95.4%, which is better than the performance of the control group (corrosion rate 0.706 mm / a, scale inhibition rate 76.9%), proving its good corrosion inhibition and scale inhibition performance in a low-hardness and high-silica environment.

[0194] The experimental results show that this formulation has good corrosion inhibition and scale inhibition capabilities under simulated electronic-grade soft water conditions, and the scaling tendency is significantly reduced. At the same time, this chemical agent does not cause a significant increase in the turbidity or conductivity of the water body, proving its good cleanliness and compatibility in the application in the electronic semiconductor industry, and it is suitable for use in circulating cooling systems for long-term operation.

[0195] Example 7: An inhibitor and scale inhibitor for industrial circulating cooling water treatment (applicable to seawater desalination type water quality) Applicable background:

[0196] In the process of industrial wastewater resource utilization, such as in high-salinity water environments like seawater desalination brine reuse and chemical wastewater recycling, traditional scale inhibitors often have poor effects due to high ionic strength, high scaling risk, and increased corrosion rate. Therefore, in this example, a compound inhibitor and scale inhibitor formulation applicable to high-salinity industrial wastewater reuse systems was designed and tested to ensure good corrosion inhibition and scale inhibition performance in environments with high conductivity, high hardness, and high salt content.

[0197] The specific ratio of the inhibitor and scale inhibitor in this example is as follows (by mass percentage):

[0198]

[0199] Experimental process and index verification:

[0200] Experimental water:

[0201] The makeup water of a large office building cooling tower system (seawater desalination brine reuse treatment) was selected, and its water quality parameters are as follows:

[0202]

[0203] According to GB / T 18175-2014 of the national standard, the corrosion inhibition performance of water treatment agents was detected, and according to GB / T 16632-2019 of the national standard, the scale inhibition performance of water treatment agents was detected. The test was divided into a blank group and a test solution group. The specific detection steps are as follows:

[0204] 1 Corrosion inhibition performance test:

[0205] 1.1 Pretreatment of test pieces: Wipe the rust-preventive grease on the test pieces with filter paper, and then scrub them with absorbent cotton in acetone and absolute ethanol respectively. For every ten test pieces, no less than 50 mL of the above reagents are used. After scrubbing clean, dry them with filter paper, place them in a desiccator for 4 h, weigh (accurate to 0.2 mg), and store them in a desiccator for later use.

[0206] 1.2 Stock solution of water treatment agent: Prepare the stock solution of water treatment agent according to the experimental requirements. The concentration of the stock solution is generally about 200 to 500 times the operating concentration. The stock solution should be prepared on the same day.

[0207] 1.3 Test water samples: The test water samples can be field water, prepared water, or recommended standard prepared water.

[0208] 1.4 Test solutions: Calculate the addition amount of the water treatment agent stock solution according to the dosing concentration of the water treatment agent in the test solution. Add the water treatment agent stock solution to the test cup, accurate to 0.02 mL. Add the test water sample to a certain volume in a 2000 mL test cup, mix well, and it is the test solution. Draw a liquid level scale line on the outer wall of the test cup.

[0209] 1.5 Aeration: If an aeration test is adopted, place the test cup in a constant temperature water bath and continuously pass air into each cup.

[0210] 1.6 Hanging test pieces and rotation test: When the test solution reaches the specified temperature, hang the test pieces for the test, start the rotation system, and make the test pieces rotate at the specified rotation speed. Start timing the test.

[0211] 1.7 Make-up water for the test solution: According to the test situation, timely add the test water sample or water to keep the liquid level at the scale line.

[0212] 1.8 Stop the rotation test: When the specified time is reached, stop the rotation test, take out the test pieces and conduct appearance observation and record.

[0213] 1.9 Post-treatment of carbon steel test pieces: Brush the test pieces clean with a brush, then clean them in the pickling solution for about 30 s, take them out, quickly rinse them with tap water, immediately immerse them in the sodium hydroxide solution for about 30 s, take them out, rinse with water, wipe and dry them with filter paper, soak them in absolute ethanol for about 3 min, place them on a clean filter paper, dry them with filter paper, place them in a desiccator for more than 4 h, and weigh (accurate to 0.2 mg). At the same time, conduct a pickling blank test on the test pieces to correct the pickling weight loss. Use corresponding treatment methods for test pieces of other materials.

[0214] 1.10 Blank test: Conduct a blank test without adding the water treatment agent.

[0215] 1.11 Observation of the pickled test pieces: Conduct appearance observation and record of the pickled test pieces.

[0216] 2 Scale inhibition performance test:

[0217] 2.1 Water treatment agent sample solution: 1.00 mL contains 0.500 mg of water treatment agent (based on dry basis)

[0218] 2.2 Water for actual working conditions: Add 250 mL of the test water sample to a 500 mL volumetric flask, add a certain amount of the water treatment agent sample solution with a pipette, shake well. Dilute to the scale with water and shake well.

[0219] 2.3 Preparation of the formulated water: Add 250 mL of water into a 500 mL volumetric flask. Add a certain volume of calcium chloride standard solution using a burette to make the amount of calcium ions 120 mg. Add a certain amount of the water treatment agent sample solution using a pipette and shake well. Then add 20 mL of borax buffer solution and shake well. Slowly add a certain volume of sodium bicarbonate standard solution using a burette (while shaking) to make the amount of bicarbonate ions 366 mg. Dilute to the mark with water and shake well.

[0220] 2.4 Preparation of the blank test solution: In another 500 mL volumetric flask, operate according to steps 1.2 or 1.3 above except without adding the water treatment agent sample solution.

[0221] The results are as follows:

[0222] The results show that the corrosion rate of the test solution group is 0.023 mm / a and the scale inhibition rate is 96.2%, which is better than the performance of the control group (corrosion rate 0.096 mm / a, scale inhibition rate 77%), proving its good corrosion inhibition and scale inhibition performance for seawater desalination type water quality.

[0223] Result analysis: The formulation of this example is applicable to the cooling tower system with high-salinity industrial wastewater reuse water as circulating makeup water, and is applicable to the circulating cooling water systems in the power, metallurgy, and petrochemical industries.

[0224] The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. An industrial circulating cooling water treatment corrosion and scale inhibitor, characterized in that, By percentage, the corrosion and scale inhibitor comprises the following components: 5-20% of an organic phosphoric acid-based corrosion inhibitor, 10%-25% of a bio-based carboxylic acid copolymer, 2%-10% of a natural polyol, 3%-15% of an environment-friendly chelating agent, 1%-10% of a dispersant, 0.5%-5% of a corrosion inhibition auxiliary agent, and deionized water to make up 100%.

2. An industrial circulating cooling water treatment corrosion and scale inhibitor according to claim 1, characterized in that, The organic phosphoric acid-based type can be one or a combination of more than one of amino trimethylene phosphonic acid, 1-hydroxyethylidene-1,1-diphosphonic acid, tetrasodium 1-hydroxyethylidene-1,1-diphosphonate, pentasodium amino trimethylene phosphonate, and dipotassium 1-hydroxyethylidene-1,1-diphosphonate.

3. An industrial circulating cooling water treatment corrosion and scale inhibitor according to claim 1, characterized in that, The bio-based carboxylic acid copolymer can be one or a combination of more than one of polyaspartic acid, polyglutamic acid, carboxymethyl chitosan, or their copolymer modified products.

4. An industrial circulating cooling water treatment corrosion and scale inhibitor according to claim 1, characterized in that, The environment-friendly chelating agent can be one or a combination of more than one of ethylenediamine disuccinic acid, sodium citrate, and sodium malate.

5. An industrial circulating cooling water treatment corrosion and scale inhibitor according to claim 1, characterized in that, The deionized water is pure water with a conductivity not higher than 5 uS / cm. The pH value of an aqueous solution with a volume percentage of 1% of the corrosion and scale inhibitor for industrial circulating cooling water treatment is 3.0 ± 1.5, presenting a transparent or light yellow solution.

6. The preparation method of an industrial circulating cooling water treatment corrosion and scale inhibitor according to any one of claims 1 to 5, characterized in that The preparation method of the corrosion and scale inhibitor comprises the following steps: S1 Weigh each component in sequence according to the said mass percentage; S2 Add the organic phosphoric acid-based corrosion inhibitor into pure water and stir to dissolve it under the condition of 25-35 °C; S3 Add the bio-based carboxylic acid copolymer and the natural polyol in sequence and stir for 30-40 min; S4 Continuously add the environment-friendly chelating agent and the dispersant in sequence and stir evenly; S5 Add the corrosion inhibition auxiliary agent, adjust the pH value of the aqueous solution with a volume percentage of 1% to 1.5-4.5, and filter to remove impurities to obtain the finished product.

7. The application method of an industrial circulating cooling water treatment corrosion inhibitor and scale inhibitor according to any one of claims 1 to 5, characterized in that, The application method of the corrosion and scale inhibitor comprises the following steps: S6 detects the indicators in the circulating cooling water of the target system: Ca 2+ , Mg 2+ , pH value, total alkalinity, silicate, TDS, COD to classify the water quality; S7 Input the detection data into the formula decision system and obtain the recommended value of the component ratio according to the multi-parameter fitting model; S8 Prepare a matching formula according to the ratio range and steps listed in Claim 1.

8. The application method of an industrial circulating cooling water treatment corrosion and scale inhibitor according to claim 7, characterized in that, In S6, the water quality types are divided into the following five categories: high hardness and high alkalinity type, low hardness and high silicon type, high organic load type, seawater desalination type, and high concentration ratio type. Preset the template ratios respectively and can be adjusted adaptively.

9. The application method of an industrial circulating cooling water treatment corrosion and scale inhibitor according to claim 7, characterized in that, Add it into the circulating water system at a concentration of 30-50 mg / L and maintain the operating pH value of the system at 7.0-9.

0.

10. The application method of an industrial circulating cooling water treatment corrosion and scale inhibitor according to claim 7, characterized in that, The application method is applicable to industries such as steel, petrochemical, electric power, paper-making, pharmaceutical, and chemical fertilizer. Its corrosion rate can be controlled below the standard of 0.075 mm / a, and the decline of the heat exchanger efficiency does not exceed 5%.

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