Efficient water treatment scale inhibitor as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of water treatment, and discloses an efficient water treatment scale inhibitor as well as a preparation method and application thereof. The efficient water treatment scale inhibitor is prepared from the following raw materials in percentage by mass: 15 to 30 percent of polyacrylic acid, 5 to 15 percent of 1-hydroxyethylidene-1, 1-diphosphonic acid, 1 to 5 percent of sodium hexametaphosphate, 0.5 to 1 percent of sodium sulfate, 3 to 8 percent of hydrolytic polymaleic anhydride, 2 to 10 percent of ethylenediamine tetra (methylene phosphonic acid), 0.3 to 1.5 percent of super chelating agent and the balance of water. Wherein the super chelating agent is a copolymer of tricarboxyl nitrogen acetate and a glycol-based polymer. The efficient water treatment scale inhibitor disclosed by the invention not only has continuous chelating ability, but also has excellent stability, can still play an efficient scale inhibition effect under complex and extreme conditions such as high-temperature and high-hardness water quality, and shows remarkable advantages.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a high-efficiency water treatment scale inhibitor and a preparation method and application thereof. Background Art

[0002] The formation of scale is a major problem in industrial water treatment systems. Especially under high temperature and high hardness water conditions, calcium carbonate, calcium sulfate, silicate and other deposits will gradually accumulate in pipes, heat exchangers, boilers and other equipment, resulting in reduced heat transfer efficiency, increased energy consumption, and even equipment failure or shutdown for maintenance. In order to solve this problem, the method of adding scale inhibitors is usually used to control water quality.

[0003] The current scale inhibitors on the market mainly rely on chemical substances such as organic phosphates and polymers. These scale inhibitors slow down the formation of scale through chelation, crystal growth inhibition and dispersion. However, these common scale inhibitors have problems such as insufficient stability and reduced efficiency under certain extreme conditions (such as high temperature and high hardness water): 1) Decomposition and failure at high temperature: Many scale inhibitors are prone to decomposition under high temperature environments, especially polyacrylic acid scale inhibitors. As the temperature rises, their scale inhibition effect decreases significantly, resulting in the inability to effectively control the scale problem; 2) Limitations in high-hardness water: High-hardness water contains a large amount of metal ions such as calcium and magnesium. The chelation effect of traditional scale inhibitors often cannot completely prevent the precipitation of metal ions, which leads to rapid scale formation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a high-efficiency water treatment scale inhibitor and its preparation method and application in view of the deficiencies in the prior art. The high-efficiency scale inhibitor not only has continuous chelating ability, but also has excellent stability. It can still exert a high-efficiency scale inhibition effect under complex and extreme conditions such as high temperature and high hardness water, showing significant advantages.

[0005] In order to solve the technical problem proposed by the present invention, the present invention provides a high-efficiency water treatment scale inhibitor, which comprises the following raw materials in percentage by weight: 15-30% of polyacrylic acid, 5-15% of 1-hydroxyethylidene-1,1-diphosphonic acid, 1-5% of sodium hexametaphosphate, 0.5-1% of sodium sulfate, 3-8% of hydrolyzed polymaleic anhydride, 2-10% of ethylenediaminetetramethylenephosphonic acid, 0.3-1.5% of super chelating agent, and the balance is water.

[0006] In the above scheme, the super chelating agent is a copolymer of tricarboxylic nitriloacetic acid ester and ethylene glycol-based polymer, and its main chemical components are (C 12 H 18 N2O4) n , the degree of polymerization is 5000~10000.

[0007] In the above scheme, the preparation method of the super chelating agent comprises the following steps:

[0008] 1) dissolving tricarboxy nitriloacetate in a polar solvent, and then adding a hydrolyzing agent to obtain a mixed solution;

[0009] 2) after heating the mixed solution to the polymerization temperature, slowly adding the ethylene glycol-based polymer and the polymerization catalyst thereto to carry out a polymerization reaction;

[0010] 3) After the polymerization reaction is completed, a dilute acid solution is added to terminate the reaction and the copolymer in the system is precipitated, and the copolymer is washed and dried to obtain a solid super chelating agent.

[0011] Furthermore, the polar solvent is one of N,N-dimethylformamide, N,N-dimethylacetamide and dimethyl sulfoxide.

[0012] Furthermore, the mass ratio of the tricarboxy nitriloacetic acid ester to the volume ratio of the polar solvent is 1 g: (25-50) mL, so as to ensure that the reactants have sufficient dispersion in the solution.

[0013] Furthermore, the hydrolyzing agent is one of sodium hydroxide and potassium hydroxide.

[0014] Furthermore, the hydrolyzing agent is prepared into an aqueous solution with a concentration of 0.5 to 1 mol / L and then added.

[0015] Furthermore, the mass ratio of the hydrolyzing agent to tricarboxy nitriloacetic acid ester is (1.5-2):1.

[0016] Furthermore, the polymerization temperature is 70-90°C.

[0017] Furthermore, the total polymerization reaction time is 2 to 3 hours, wherein the addition time of the ethylene glycol-based polymer and the polymerization catalyst is 0.5 to 1 hour, and the reaction is continued for 1.5 to 2 hours after the addition is completed.

[0018] Furthermore, the ethylene glycol-based polymer is one of polyethylene glycol and polyethylene glycol diacrylate, which can provide appropriate reaction sites and enhance the flexibility of the copolymer.

[0019] Furthermore, the mass ratio of the ethylene glycol-based polymer to the tricarboxy nitriloacetic acid ester is (2-5):1.

[0020] Furthermore, the polymerization catalyst is a copper-based MOF material.

[0021] Furthermore, the polymerization catalyst is one of Cu-BTC, Cu-MOF-74, and Cu-TPA.

[0022] Furthermore, the mass ratio of the polymerization catalyst to the tricarboxy nitriloacetic acid ester is (0.01-0.05):1, ensuring that the reaction is promoted at an appropriate amount without affecting the properties of the copolymer.

[0023] Furthermore, the dilute acid solution is hydrochloric acid or sulfuric acid, and the concentration is 0.1-0.5 mol / L.

[0024] Furthermore, the mass of the dilute acid solution is 1 to 1.5 times the total mass of the polymerization reaction system.

[0025] Furthermore, the washing is performed using ethanol, methanol or water to remove unreacted monomers and solvent residues.

[0026] Furthermore, the drying temperature is 50-80° C. and the drying time is 4-8 hours.

[0027] The present invention also provides a method for preparing a high-efficiency water treatment scale inhibitor, comprising the following steps:

[0028] S1. Add polyacrylic acid, sodium sulfate, 1-hydroxyethylidene-1,1-diphosphonic acid, sodium hexametaphosphate and hydrolyzed polymaleic anhydride into water in sequence, and stir thoroughly until dissolved;

[0029] S2. After the temperature is raised, ethylenediaminetetramethylenephosphonic acid and super chelating agent are added successively, and stirring is continued to ensure that the components are evenly mixed and stable;

[0030] S3. After cooling to room temperature, filter to obtain a clarified and efficient water treatment antiscalant.

[0031] In the above scheme, in step S2, the temperature is raised to 50-60° C. This temperature range can ensure good solubility and uniform dispersion of ethylenediaminetetramethylenephosphonic acid and super chelating agent, while avoiding decomposition that may be caused by excessively high temperature.

[0032] The present invention also provides an application of a high-efficiency water treatment scale inhibitor in water treatment, and the application method is: adding the high-efficiency water treatment scale inhibitor into a water system requiring scale inhibition.

[0033] In the above scheme, the high-efficiency water treatment antiscalant can be quantitatively added through a dosing pump so that the antiscalant is stably present in the water system and acts effectively.

[0034] In the above scheme, the dosage of the high-efficiency water treatment scale inhibitor is 10-50 mg / L. Addition within this concentration range can effectively exert the scale inhibition effect while avoiding the increase in economic costs and side effects caused by excessive use.

[0035] In the above scheme, the applicable temperature range of the high-efficiency water treatment scale inhibitor is 20 to 90°C, and the applicable hardness range is 100 to 1000 mg / L in terms of CaCO3.

[0036] The technical concept of the present invention is:

[0037] First, a super chelating agent is prepared, with tricarboxylic nitriloacetate as the basic structure of the chelating agent to provide nitrogen atoms for metal chelation, ethylene glycol-based polymers to form superconducting channels between molecules to ensure the flexibility and conductivity of the molecular chain structure, and polymerization catalysts to start the polymerization process of the molecules; its molecular skeleton is composed of repeated nitrogen-oxygen groups, which provide chelating sites through nitrogen atoms, and nitrogen atoms bind to metal ions (such as Ca) through coordination bonds. 2+ Mg 2+ ) combination, while oxygen atoms provide additional electron cloud effect to help stabilize this combination and prevent metal ion scaling. It has a synergistic mechanism in chelating and stabilizing metal ions. Its molecular structure can maintain chemical stability at higher temperatures and is conducive to the efficient conduction and dispersion of metal ions, ensuring excellent stability and chelation in high temperature and complex water quality.

[0038] Secondly, the super chelating agent is combined with other components to form a highly efficient water treatment scale inhibitor. The components have a synergistic effect, as follows:

[0039] Dispersing effect of polyacrylic acid and hydrolyzed polymaleic anhydride: Both polyacrylic acid and hydrolyzed polymaleic anhydride have the function of dispersing particles, but their respective mechanisms of action are different. Polyacrylic acid mainly prevents calcium ions from combining with carbonates, while hydrolyzed polymaleic anhydride prevents crystal growth by combining with metal ions through carboxyl groups. The synergistic effect of the two not only inhibits the formation of initial crystals, but also prevents the aggregation of small particle crystals that have been generated, thereby forming a stable dispersion system and effectively preventing large-scale deposition of scale.

[0040] Chelation of 1-hydroxyethylidene-1,1-diphosphonate and ethylenediaminetetra(methylenephosphonic acid): Both 1-hydroxyethylidene-1,1-diphosphonate and ethylenediaminetetra(methylenephosphonic acid) have the ability to chelate metal ions, but their action strengths vary under different water quality conditions. 1-hydroxyethylidene-1,1-diphosphonate has excellent effects under low to medium hardness, while ethylenediaminetetra(methylenephosphonic acid) can maintain efficient chelation in high hardness water. The combination of the two ensures that the scale inhibitor can effectively inhibit the precipitation of metal ions such as calcium and magnesium under a variety of water quality conditions, and continue to maintain its effect under high hardness conditions, forming a strong chelation scale inhibition system.

[0041] Crystal growth inhibition and dispersion of super chelating agent and sodium hexametaphosphate: Super chelating agent can effectively bind metal ions such as calcium and magnesium at high temperature through its unique molecular skeleton and chelation to prevent the formation of scale; while the multivalent phosphate of sodium hexametaphosphate can inhibit the growth and aggregation of crystals. The combined effect of the two can further improve the stability and efficiency of the scale inhibitor under high temperature and high hardness conditions. This combination is particularly suitable for forming a stable scale protection layer in systems with large temperature fluctuations.

[0042] Auxiliary role of sodium sulfate: As an ionic strength regulator, sodium sulfate helps maintain the uniformity of the solution throughout the formulation, making the chelation and dispersion of other ingredients more uniform. By providing a higher ionic strength, it not only enhances the attraction of the chelating agent to metal ions, but also helps the dispersed ingredients remain dispersed, thereby further improving the stability and long-term effectiveness of the scale inhibitor.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] The present invention aims at the problem that existing scale inhibitors have insufficient stability and reduced efficiency under extreme water conditions such as high temperature and high hardness, and develops a new high-efficiency water treatment scale inhibitor; the super chelating agent in its composition can effectively chelate metal ions such as calcium and magnesium under high temperature environment to prevent the formation of sediments, and at the same time, the hydrolyzed polymaleic anhydride provides additional dispersing effect in high temperature environment through its carboxyl structure to prevent the aggregation of precipitated crystals, so that the scale inhibitor can maintain chemical stability and continuously disperse the sediment to avoid the formation of scale in high temperature environment, and coupled with the auxiliary effect of polyacrylic acid, the dispersing ability of polyacrylic acid under high temperature conditions and the chelating ability of LGF work together to further inhibit the formation of calcium carbonate and other sediments, and this multi-level dispersion and chelating synergistic effect significantly improves the scale inhibitor in high temperature water. The stability and scale inhibition efficiency under high hardness water conditions; for high hardness water conditions, the super chelating agent and 1-hydroxyethyl-1,1-diphosphonate chelate metal ions from different sites respectively, reducing the tendency of metal ions to combine with carbonate and sulfate, and the double chelation ensures that the formation of scale can still be effectively controlled under high hardness conditions. At the same time, the multivalent phosphate of sodium hexametaphosphate combines with metal ions such as calcium and magnesium to further inhibit the formation of crystals, and complements the chelation of the super chelating agent and 1-hydroxyethyl-1,1-diphosphonate. Under high hardness conditions, a more efficient scale inhibition effect is achieved than a single component by simultaneously dispersing, chelating and inhibiting crystallization. In summary, the scale inhibitor of the present invention can still achieve efficient scale inhibition under complex and extreme conditions such as high temperature and high hardness water, showing significant advantages. DETAILED DESCRIPTION

[0045] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with the embodiments, but the content of the present invention is not limited to the following embodiments.

[0046] Example 1

[0047] A high-efficiency water treatment scale inhibitor comprises the following raw materials in percentage by weight: 20% polyacrylic acid, 10% 1-hydroxyethylidene-1,1-diphosphonic acid, 3.0% sodium hexametaphosphate, 0.7% sodium sulfate, 5.0% hydrolyzed polymaleic anhydride, 5.0% ethylenediaminetetramethylenephosphonic acid, 1.0% super chelating agent, and the balance is water.

[0048] The super chelating agent in this embodiment is a copolymer of tricarboxy nitriloacetate and ethylene glycol polymer, and its main chemical components are (C 12 H 18 N2O4) n , the degree of polymerization is 7000, and the preparation method comprises the following steps:

[0049] 1) dissolving 10 g of tricarboxy nitriloacetate in 250 mL of N,N-dimethylformamide, and adding 15 g of sodium hydroxide prepared into an aqueous solution with a concentration of 0.5 mol / L to obtain a mixed solution;

[0050] 2) After the mixed solution was heated to 70°C, 30g of polyethylene glycol and 0.3g of Cu-BTC were slowly added thereto for polymerization reaction. The addition was completed within 1 hour, and the reaction was continued for 1.5 hours after the addition was completed;

[0051] 3) After the polymerization reaction is completed, hydrochloric acid with a concentration of 0.2 mol / L and a weight of 1 times the total mass of the polymerization reaction system is added to terminate the reaction, and the copolymer in the system is precipitated. The copolymer is washed with ethanol and dried at 60° C. for 5 h to obtain a solid super chelating agent.

[0052] The preparation method of the high-efficiency water treatment scale inhibitor in this embodiment comprises the following steps:

[0053] S1. Add polyacrylic acid, sodium sulfate, 1-hydroxyethylidene-1,1-diphosphonic acid, sodium hexametaphosphate and hydrolyzed polymaleic anhydride into water in sequence, and stir thoroughly until dissolved;

[0054] S2. After the temperature is raised to 55°C, ethylenediaminetetramethylenephosphonic acid and super chelating agent are added successively, and stirring is continued to ensure that the components are evenly mixed and stable;

[0055] S3. After cooling to room temperature, filter to obtain a clarified and efficient water treatment antiscalant.

[0056] Example 2

[0057] A high-efficiency water treatment scale inhibitor comprises the following raw materials in percentage by weight: 20% polyacrylic acid, 10% 1-hydroxyethylidene-1,1-diphosphonic acid, 3% sodium hexametaphosphate, 0.8% sodium sulfate, 5% hydrolyzed polymaleic anhydride, 5% ethylenediaminetetramethylenephosphonic acid, 1% super chelating agent, and the balance being water.

[0058] The super chelating agent in this embodiment is a copolymer of tricarboxy nitriloacetate and ethylene glycol polymer, and its main chemical components are (C 12 H 18 N2O4) n , the degree of polymerization is 7000, and the preparation method comprises the following steps:

[0059] 1) dissolving 15 g of tricarboxy nitriloacetate in 450 mL of N,N-dimethylacetamide, and adding 25 g of potassium hydroxide prepared into an aqueous solution with a concentration of 1 mol / L to obtain a mixed solution;

[0060] 2) After the mixed solution is heated to 80° C., 40 g of polyethylene glycol diacrylate and 0.6 g of Cu-MOF-74 are slowly added thereto for polymerization reaction, and the addition is controlled to be completed within 1 hour, and the reaction is continued for 2 hours after the addition is completed;

[0061] 3) After the polymerization reaction is completed, sulfuric acid with a concentration of 0.3 mol / L and an amount of 1.5 times the total mass of the polymerization reaction system is added to terminate the reaction, and the copolymer in the system is precipitated. The copolymer is washed with deionized water and dried at 70° C. for 6 h to obtain a solid super chelating agent.

[0062] The preparation method of the high-efficiency water treatment scale inhibitor in this embodiment comprises the following steps:

[0063] S1. Add polyacrylic acid, sodium sulfate, 1-hydroxyethylidene-1,1-diphosphonic acid, sodium hexametaphosphate and hydrolyzed polymaleic anhydride into water in sequence, and stir thoroughly until dissolved;

[0064] S2. After the temperature is raised to 60°C, ethylenediaminetetramethylenephosphonic acid and super chelating agent are added successively, and stirring is continued to ensure that the components are evenly mixed and stable;

[0065] S3. After cooling to room temperature, filter to obtain a clarified and efficient water treatment antiscalant.

[0066] Example 3

[0067] A high-efficiency water treatment scale inhibitor comprises the following raw materials in percentage by weight: 25% polyacrylic acid, 12% 1-hydroxyethylidene-1,1-diphosphonic acid, 4% sodium hexametaphosphate, 1% sodium sulfate, 7% hydrolyzed polymaleic anhydride, 8% ethylenediaminetetramethylenephosphonic acid, 1.2% super chelating agent, and the balance is water.

[0068] The super chelating agent in this embodiment is a copolymer of tricarboxy nitriloacetate and ethylene glycol polymer, and its main chemical components are (C 12 H 18 N2O4) n , the degree of polymerization is 9000, and the preparation method comprises the following steps:

[0069] 1) dissolving 20 g of tricarboxy nitriloacetate in 500 mL of dimethyl sulfoxide, and adding 35 g of sodium hydroxide prepared into an aqueous solution with a concentration of 0.8 mol / L to obtain a mixed solution;

[0070] 2) After the mixed solution is heated to 75°C, 50g of polyethylene glycol and 1g of Cu-TPA are slowly added thereto for polymerization reaction, and the addition is controlled to be completed within 1 hour, and the reaction is continued for 2 hours after the addition is completed;

[0071] 3) After the polymerization reaction is completed, 0.4 mol / L hydrochloric acid in an amount of 1.2 times the total mass of the polymerization reaction system is added to terminate the reaction, and the copolymer in the system is precipitated. The copolymer is washed with methanol and dried at 65° C. for 8 h to obtain a solid super chelating agent.

[0072] The preparation method of the high-efficiency water treatment scale inhibitor in this embodiment comprises the following steps:

[0073] S1. Add polyacrylic acid, sodium sulfate, 1-hydroxyethylidene-1,1-diphosphonic acid, sodium hexametaphosphate and hydrolyzed polymaleic anhydride into water in sequence, and stir thoroughly until dissolved;

[0074] S2. After the temperature is raised to 55°C, ethylenediaminetetramethylenephosphonic acid and super chelating agent are added successively, and stirring is continued to ensure that the components are evenly mixed and stable;

[0075] S3. After cooling to room temperature, filter to obtain a clarified and efficient water treatment antiscalant.

[0076] Comparative Example 1

[0077] The difference between Comparative Example 1 and Example 1 is that no super chelating agent is added.

[0078] Comparative Example 2

[0079] Comparative Example 2 is a commercially available polyacrylic acid scale inhibitor.

[0080] Application Examples

[0081] The scale inhibitors in each embodiment and each comparative example are respectively applied to the circulating cooling water system, and the application method is: the scale inhibitor is quantitatively added to the water system through a dosing pump. The water quality conditions and the dosage of the scale inhibitor in the system are detailed in Table 1. The scale inhibition effect of each test group is tested with reference to GB / T 16632-2019 "Determination of scale inhibition performance of water treatment agents - calcium carbonate deposition method", and the results are shown in Table 1.

[0082] Table 1

[0083]

[0084]

[0085] It can be seen from Table 1 that the scale inhibition rate of the comparative example under various conditions is significantly lower than that of the embodiment, indicating its insufficiency in scale inhibition effect; the scale inhibition performance of the embodiment is significantly improved, especially under extreme water conditions of high temperature and high hardness, and is significantly better than traditional commercially available scale inhibitors.

[0086] The above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above descriptions. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the protection scope of the invention.

Claims

1. A highly efficient water treatment scale inhibitor, It is characterized in that The invention comprises the following raw materials in percentage by weight: 15-30% polyacrylic acid, 5-15% 1-hydroxyethylidene-1,1-diphosphonic acid, 1-5% sodium hexametaphosphate, 0.5-1% sodium sulfate, 3-8% hydrolyzed polymaleic anhydride, 2-10% ethylenediaminetetramethylenephosphonic acid, 0.3-1.5% super chelating agent, and the balance is water; the super chelating agent is a copolymer of tricarboxy nitriloacetic acid ester and ethylene glycol-based polymer.

2. The high-efficiency water treatment scale inhibitor according to claim 1, It is characterized in that The main chemical components of the super chelating agent are (C 12 H 18 N 2 O 4 ) n , the degree of polymerization is 5000~10000.

3. The high-efficiency water treatment antiscalant according to claim 1, It is characterized in that The preparation method of the super chelating agent comprises the following steps: 1) dissolving tricarboxy nitriloacetate in a polar solvent, and then adding a hydrolyzing agent to obtain a mixed solution; 2) after heating the mixed solution to the polymerization temperature, slowly adding the ethylene glycol-based polymer and the polymerization catalyst thereto to carry out a polymerization reaction; 3) After the polymerization reaction is completed, a dilute acid solution is added to terminate the reaction and the copolymer in the system is precipitated, and the copolymer is washed and dried to obtain a solid super chelating agent.

4. The high-efficiency water treatment scale inhibitor according to claim 3, It is characterized in that The ethylene glycol-based polymer is one of polyethylene glycol and polyethylene glycol diacrylate; the mass ratio of the ethylene glycol-based polymer to tricarboxy nitriloacetic acid ester is (2-5):

1.

5. The high-efficiency water treatment antiscalant according to claim 3, It is characterized in that The polymerization catalyst is a copper-based MOF material; the mass ratio of the polymerization catalyst to tricarboxy nitriloacetate is (0.01-0.05):

1.

6. The high-efficiency water treatment scale inhibitor according to claim 3, It is characterized in that The hydrolyzing agent is one of sodium hydroxide and potassium hydroxide; the mass ratio of the hydrolyzing agent to tricarboxy nitriloacetic acid ester is (1.5-2):

1.

7. The high-efficiency water treatment antiscalant according to claim 3, It is characterized in that The polymerization temperature is 70-90° C.; the total polymerization reaction time is 2-3 hours, wherein the addition time of the ethylene glycol-based polymer and the polymerization catalyst is 0.5-1 hour, and the reaction is continued for 1.5-2 hours after the addition is completed.

8. The high-efficiency water treatment antiscalant according to claim 3, It is characterized in that The polar solvent is one of N,N-dimethylformamide, N,N-dimethylacetamide and dimethyl sulfoxide; the mass ratio of the tricarboxy nitriloacetic acid ester to the volume ratio of the polar solvent is 1g:(25-50)mL.

9. The method for preparing the high-efficiency water treatment scale inhibitor according to any one of claims 1 to 8, It is characterized in that The following steps are involved: S1. Add polyacrylic acid, sodium sulfate, 1-hydroxyethylidene-1,1-diphosphonic acid, sodium hexametaphosphate and hydrolyzed polymaleic anhydride into water in sequence, and stir thoroughly until dissolved; S2. After the temperature is raised to 50-60°C, ethylenediaminetetramethylenephosphonic acid and super chelating agent are added successively, and stirring is continued to ensure that the components are evenly mixed and stable; S3. After cooling to room temperature, filter to obtain a clarified and efficient water treatment antiscalant.

10. Use of the high-efficiency water treatment antiscalant according to any one of claims 1 to 8, It is characterized in that The temperature applicable range of the high-efficiency water treatment scale inhibitor is 20-90°C, and the hardness applicable range is CaCO 3 100~1000mg / L.

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