Environment-friendly high-performance scale inhibitor and preparation method thereof

Abstract

The invention relates to an environment-friendly high-performance scale inhibitor and a preparation method thereof, and belongs to the technical field of industrial circulating water treatment. The component A comprises the following components in percentage by mass: 5-15% of sodium molybdate, 5-15% of sodium tungstate, 15-25% of sodium polyacrylate, 5-15% of sodium borate, 15-25% of zinc sulfate, 5-10% of zinc chloride, 3-8% of sodium silicate and 2-6% of benzotriazole; the component B is prepared from the following components in percentage by mass: 15 to 25 percent of HEDP, 15 to 25 percent of PBTC, 35 to 50 percent of AA / AMPS copolymer and 15 to 25 percent of deionized water. According to the environment-friendly high-performance scale inhibitor and the preparation method thereof, a phosphorus-free and low-toxicity formula is adopted, the environment-friendly corrosion inhibitors such as sodium molybdate and sodium tungstate are used for completely replacing traditional phosphorus-based and chromium-based toxic components, water eutrophication and heavy metal pollution risks are avoided from the source, meanwhile, polymers such as AA / AMPS selected in the formula have good biodegradability, and the scale inhibitor is environmentally friendly and free of pollution. The whole product is safe and low in irritation, and meets the development trend of green chemicals and strict requirements of environmental protection laws and regulations.

Description

Technical Field

[0001] This invention relates to the field of industrial circulating water treatment technology, specifically to an environmentally friendly, high-performance scale inhibitor for circulating cooling water systems, particularly evaporative condensers, and its preparation method. Background Technology

[0002] Currently, industrial circulating cooling water systems (especially evaporative condensers) commonly face problems such as scaling, corrosion, and microbial growth, severely impacting equipment efficiency and lifespan. Traditional scale and corrosion inhibitors often contain components such as phosphorus, chromium, and zinc, which, while effective to some extent, have the following significant drawbacks:

[0003] 1. Significant environmental harm: Elements such as phosphorus and chromium can easily lead to eutrophication or heavy metal pollution in water bodies, which does not meet the requirements of green environmental protection;

[0004] 2. Significant performance limitations: In harsh water conditions such as high hardness, high alkalinity, and high chloride ion concentration, the scale inhibition and corrosion inhibition performance of traditional agents is severely reduced, making it difficult to form a stable protective film. The scale layer is hard and prone to localized corrosion.

[0005] 3. Poor chemical stability: It is easily decomposed and ineffective under high temperature and high pH conditions, and its long-term effectiveness is insufficient;

[0006] 4. Poor biodegradability: Traditional polymer components are difficult to degrade, posing a risk of environmental accumulation.

[0007] Therefore, developing a novel scale inhibitor that combines high-efficiency scale and corrosion inhibition performance, excellent environmental friendliness, wide adaptability to water quality, and long-term stability has become an urgent technical challenge to be solved in this field. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides an environmentally friendly, high-performance scale inhibitor and its preparation method. It has the advantages of being environmentally friendly, synergistically efficient, long-lasting and stable, highly adaptable, and simple to prepare. It solves the problems of traditional scale inhibitors, such as poor environmental performance, insufficient performance in high-hardness and high-chloride water, poor long-term stability, and low biodegradability.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] An environmentally friendly, high-performance scale inhibitor, composed of component A and component B;

[0011] in:

[0012] Component A, by mass fraction, comprises: sodium molybdate 5-15%, sodium tungstate 5-15%, sodium polyacrylate 15-25%, sodium borate 5-15%, zinc sulfate 15-25%, zinc chloride 5-10%, sodium silicate 3-8%, and benzotriazole 2-6%;

[0013] The B component, by mass fraction, comprises: 15-25% HEDP, 15-25% PBTC, 35-50% AA / AMPS copolymer, and 15-25% deionized water.

[0014] Furthermore, in component A, the mass ratio of sodium molybdate to sodium tungstate is 1:0.8 to 1.2.

[0015] Furthermore, in component A, the total zinc content of zinc sulfate and zinc chloride accounts for 12-22% of the total mass of component A.

[0016] Furthermore, in component B, the mass ratio of HEDP to PBTC is 1:0.8 to 1.2.

[0017] Furthermore, the molar ratio of acrylic acid to AMPS monomer in the AA / AMPS copolymer is 2:1 to 4:1, and the molecular weight is 3000 to 8000.

[0018] Furthermore, when using the scale inhibitor, the concentration of component A is 65–80 mg / L and the concentration of component B is 35–60 mg / L.

[0019] Another technical problem to be solved by the present invention is to provide a method for preparing an environmentally friendly, high-performance scale inhibitor, comprising the following steps:

[0020] S1. Preparation of component A: Add the powders of sodium molybdate, sodium tungstate, sodium polyacrylate, sodium borate, zinc sulfate, zinc chloride, sodium silicate, and benzotriazole to a stainless steel mixer in the specified proportions. Mix and stir at room temperature for 30-60 minutes until homogeneous, then weigh and package.

[0021] S2. Preparation of component B: Add HEDP, PBTC, AA / AMPS copolymer and deionized water to a container according to the ratio, and stir and mix at 30-50℃ for 40-80 minutes until a homogeneous and transparent solution is formed.

[0022] Furthermore, the mixing speed in S1 is 200-400 r / min.

[0023] Furthermore, the stirring speed in S2 is 100-300 r / min.

[0024] Another technical problem to be solved by the present invention is to provide an application of an environmentally friendly high-performance scale inhibitor, which is used in the anti-corrosion and scale inhibition treatment of industrial circulating cooling water systems or evaporative condensers.

[0025] Compared with the prior art, the present invention provides an environmentally friendly high-performance scale inhibitor and its preparation method, which has the following beneficial effects:

[0026] 1. This environmentally friendly high-performance scale inhibitor and its preparation method adopt a phosphorus-free and low-toxicity formula, and completely replace the traditional phosphorus-based and chromium-based toxic components with environmentally friendly corrosion inhibitors such as sodium molybdate and sodium tungstate. This avoids the risk of eutrophication and heavy metal pollution of water bodies from the source. At the same time, the polymers such as AA / AMPS selected in the formula have good biodegradability. The overall product is safe and low in irritation, which is in line with the development trend of green chemicals and the requirements of strict environmental protection regulations, and achieves a balance between high efficiency, environmental protection and safety.

[0027] 2. This environmentally friendly high-performance scale inhibitor and its preparation method, through the scientific compounding of component A (sodium molybdate, sodium tungstate, zinc salt, benzotriazole and other corrosion inhibitors and film-forming agents) and component B (HEDP, PBTC, AA / AMPS and other scale inhibitors and dispersants), produce a significant synergistic effect. It can not only quickly form a dense and firm composite protective film on the metal surface, providing efficient corrosion inhibition (more than 30% increase in corrosion inhibition efficiency) for various materials such as carbon steel, copper, and stainless steel, but also strongly inhibit the deposition of various inorganic salts such as calcium carbonate, calcium sulfate, and silica scale through lattice distortion and dispersion, with a scale inhibition rate of over 90%. This composite effect ensures that the agent's performance remains stable and does not decompose under harsh water quality conditions such as pH 7.0–9.5, temperature ≤80℃, high chloride ion, and high hardness. Only a low concentration of 65–80 mg / L for component A and 35–60 mg / L for component B is needed to achieve long-term stable operation of the system.

[0028] 3. This environmentally friendly high-performance scale inhibitor and its preparation method are designed for complex water qualities such as high salt, high hardness, and high alkalinity, and exhibit universal and strong performance. Its application can significantly improve heat exchange efficiency, reduce system energy consumption and pressure difference, reduce the frequency of equipment maintenance, chemical cleaning and mechanical descaling caused by scaling and corrosion, extend equipment service life, and significantly reduce overall operating costs, resulting in significant economic benefits.

[0029] 4. This environmentally friendly high-performance scale inhibitor and its preparation method involve dry mechanical mixing and solution mixing of components A and B, respectively. The preparation process is simple, mild, and requires no complex equipment, making it easy to achieve large-scale and stable production. The scale inhibitor is not only suitable for evaporative condensers, but can also be widely used in various industrial circulating cooling water systems such as power, chemical, metallurgy, and central air conditioning, meeting national standards and having broad market application prospects. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1:

[0032] A method for preparing an environmentally friendly high-performance scale inhibitor includes a preparation step of component A and a preparation step of component B.

[0033] In this embodiment, the preparation steps of component A include:

[0034] A1: According to the formula shown in Table 1, accurately weigh 10.0 kg of sodium molybdate, 10.0 kg of sodium tungstate, 20.0 kg of sodium polyacrylate, 10.0 kg of sodium borate, 20.0 kg of zinc sulfate, 8.0 kg of zinc chloride, 5.0 kg of sodium silicate, and 4.0 kg of benzotriazole.

[0035] A2: At room temperature (25°C), add the above raw material powders in the order described above into a stainless steel V-type mixer with a volume of 200L.

[0036] A3: Set the stirring speed to 300 r / min and continue mixing for 45 minutes. During this period, stop the machine every 15 minutes to check the mixing uniformity to ensure that all materials are mixed evenly, have a consistent color, and are free from lumps or color separation.

[0037] A4: After mixing, discharge the material, take samples for testing, weigh and package (25kg per bag) to obtain a uniform powder product of component A, which is white to light gray.

[0038] In this embodiment, the preparation steps of component B include:

[0039] B1: According to the formula shown in Table 1, accurately weigh 40.0 kg of HEDP (50% solid content), 40.0 kg of PBTC (50% solid content), 100.0 kg of AA / AMPS copolymer (acrylic acid to AMPS molar ratio of 3:1, molecular weight of about 5000, solid content of 40%), and 20.0 kg of deionized water.

[0040] B2: Add the above raw materials together into a 500L glass-lined reactor equipped with an anchor-type agitator and a jacketed heating device.

[0041] B3: Start stirring, set the speed to 200 r / min, and simultaneously introduce hot water through the jacket to slowly raise the material temperature to and control it at 40℃.

[0042] B4: Under these conditions, continue stirring for 60 minutes, taking samples during the process, until all solid components are completely dissolved and the system forms a homogeneous, transparent, pale yellow viscous liquid free of suspended matter.

[0043] B5: After cooling to room temperature, discharge, filter and package (25kg per barrel) to obtain component B product.

[0044] Example 2: (Focusing on highly efficient corrosion inhibitor formulation)

[0045] A method for preparing an environmentally friendly high-performance scale inhibitor includes a preparation step of component A and a preparation step of component B.

[0046] In this embodiment, the preparation steps of component A include:

[0047] According to the formulation in Example 2 of Table 1, accurately weigh 5.0 kg of sodium molybdate, 15.0 kg of sodium tungstate, 15.0 kg of sodium polyacrylate, 5.0 kg of sodium borate, 25.0 kg of zinc sulfate, 5.0 kg of zinc chloride, 8.0 kg of sodium silicate, and 6.0 kg of benzotriazole.

[0048] This formulation is characterized by increased sodium tungstate and benzotriazole content, designed to enhance corrosion inhibition performance against copper alloys and various metals, while the higher zinc sulfate content provides rapid cathodic protection. The preparation process is the same as in Example 1: the raw materials are added sequentially to a mixer and stirred at 280 r / min for 50 minutes at room temperature to ensure homogeneity.

[0049] In this embodiment, the preparation steps of component B include:

[0050] According to the formulation in Example 2 of Table 1, accurately weigh 30.0 kg of HEDP (50%), 50.0 kg of PBTC (50%), 125.0 kg of AA / AMPS copolymer (acrylic acid to AMPS molar ratio of 2:1, molecular weight of about 8000, 40%), and 10.0 kg of deionized water.

[0051] The B-component formulation increases the ratio of PBTC to AA / AMPS. PBTC exhibits good stability at high temperatures and high pH levels and works synergistically with the high proportion of AMPS copolymer, focusing on maintaining excellent scale inhibition and dispersion capabilities under harsh conditions. The preparation process is the same as in Example 1, involving stirring at 180 r / min for 70 minutes at 35°C to form a homogeneous solution.

[0052] Example 3: (Focusing on economy and scale inhibition formulation)

[0053] A method for preparing an environmentally friendly high-performance scale inhibitor includes a preparation step of component A and a preparation step of component B.

[0054] In this embodiment, the preparation steps of component A include:

[0055] According to the formulation in Example 3 of Table 1, accurately weigh 15.0 kg of sodium molybdate, 5.0 kg of sodium tungstate, 25.0 kg of sodium polyacrylate, 15.0 kg of sodium borate, 15.0 kg of zinc sulfate, 10.0 kg of zinc chloride, 3.0 kg of sodium silicate, and 2.0 kg of benzotriazole.

[0056] This formulation is characterized by a high sodium molybdate content (relatively lower cost than sodium tungstate) and the highest sodium polyacrylate content, focusing on improving scale inhibition performance through enhanced dispersion and optimizing overall cost. The preparation process is the same as in Example 1, involving mixing and stirring at 320 r / min for 40 minutes at room temperature.

[0057] In this embodiment, the preparation steps of component B include:

[0058] According to the formulation in Example 3 of Table 1, accurately weigh 50.0 kg of HEDP (50%), 30.0 kg of PBTC (50%), 87.5 kg of AA / AMPS copolymer (acrylic acid to AMPS molar ratio of 4:1, molecular weight of about 3000, 40%), and 25.0 kg of deionized water.

[0059] This formulation increases the HEDP ratio, whose excellent calcium scale inhibition ability, combined with low molecular weight AA / AMPS (fast dispersion speed), focuses on rapidly inhibiting scale crystal growth. The preparation process is the same as in Example 1, with stirring at 250 r / min for 50 minutes at 45°C to form a homogeneous solution.

[0060] Comparative Example 1: (Preparation of traditional phosphorus-based scale inhibitors).

[0061] The preparation process in this embodiment includes:

[0062] To compare performance, a commonly available phosphorus-based scale and corrosion inhibitor was prepared according to the typical formulation of Comparative Example 1 in Table 1. 15.0 kg of sodium phosphate (as PO4³⁻), 15.0 kg of sodium polyacrylate (dispersant), 10.0 kg of sodium borate, 25.0 kg of zinc sulfate, 5.0 kg of sodium silicate, 3.0 kg of benzotriazole, 60.0 kg of HEDP (50%), 60.0 kg of PBTC (50%), 75.0 kg of ordinary polyacrylic acid (molecular weight approximately 6000, 40%), and 10.0 kg of deionized water were accurately weighed.

[0063] All solid powder raw materials except zinc sulfate (sodium phosphate, sodium polyacrylate, sodium borate, sodium silicate, and benzotriazole) were initially mixed according to the dry mixing process of component A of this invention. Then, under stirring conditions, the mixed powder was slowly added to a solution containing dissolved HEDP, PBTC, polyacrylic acid, and deionized water. Finally, zinc sulfate was added, and the mixture was stirred at 40°C until completely dissolved to obtain a phosphorus-containing composite liquid agent.

[0064] This formulation represents the traditional technical solution described in the background art, which suffers from environmental hazards and performance degradation under high chloride ion conditions.

[0065] Table 1: Scale inhibitor formulations (mass fraction %) for Examples 1-3 and Comparative Example 1

[0066] Components Raw material name Example 1 Example 2 Example 3 Comparative Example 1 (Traditional Phosphorus System) Component A (powder) Sodium molybdate 10 5 15 0 (using 15% phosphate) Sodium tungstate 10 15 5 0 Sodium polyacrylate 20 15 25 15 Sodium borate 10 5 15 10 Zinc sulfate 20 25 15 25 Zinc chloride 8 5 10 0 Sodium silicate 5 8 3 5 benzotriazole 4 6 2 3 Component B (liquid) HEDP 20 15 25 30 PBTC 20 25 15 30 AA / AMPS 40 50 35 30 (using standard polyacrylic acid) Deionized water 20 10 25 10

[0067] Application experiments and performance testing:

[0068] The scale inhibitors prepared in Examples 1-3 were compared with those in Comparative Example 1 under simulated industrial circulating water conditions.

[0069] 1. Experimental conditions:

[0070] Test water quality: Simulated water quality with high hardness and high chloride ion content was prepared.

[0071] Ca²⁺ (as CaCO₃) = 800 mg / L;

[0072] Mg²⁺ (as CaCO₃) = 400 mg / L;

[0073] Cl⁻ = 1000 mg / L;

[0074] SO4²⁻ = 500 mg / L;

[0075] HCO3⁻ = 200 mg / L (calculated as CaCO3);

[0076] pH = 8.5 ± 0.2;

[0077] Temperature = 50±1℃.

[0078] Dosage concentration: According to the concentrations recommended by this invention, for the products in Examples 1-3: the dosage concentration of component A is 70 mg / L, and the dosage concentration of component B is 50 mg / L. Comparative Example 1 was administered at its conventionally recommended total concentration of 120 mg / L (single dosing).

[0079] Experimental methods:

[0080] Corrosion inhibition performance test: The rotating plate weight loss method was used (refer to GB / T 18175-2014). The materials were 20# carbon steel and H62 brass, and the plate size was 50.0mm×25.0mm×2.0mm. The test cycle was 72 hours. The average corrosion rate and corrosion inhibition rate were calculated.

[0081] Scale inhibition performance test: The scale inhibition rate against calcium carbonate scale was determined using the static scale inhibition method (referring to GB / T 16632-2019). The test temperature was 80℃ and the test time was 10 hours.

[0082] Stability and compatibility testing: The dosing water sample prepared according to the usage concentration was placed in a sealed glass bottle and aged for 168 hours in a constant temperature water bath at 80℃. The appearance changes were observed and recorded. Then, the sample was cooled to room temperature, and its scale inhibition rate was re-measured, and the performance retention rate was calculated.

[0083] 2. The experimental results and analysis are shown in Table 2:

[0084] Table 2: Comparison Test Results of Scale Inhibition and Corrosion Inhibition Performance

[0085] Test Project Example 1 Example 2 Example 3 Comparative Example 1 Test Standards Corrosion rate of carbon steel (mm / a) 0.021 0.026 0.024 0.098 GB / T18175-2014 Corrosion inhibition rate of carbon steel (%) 96.2 94.8 95.5 78.3 Calculation Brass corrosion rate (mm / a) 0.003 0.002 0.004 0.012 GB / T18175-2014 Copper corrosion inhibition rate (%) 98.5 97.1 98.0 85.6 Calculation Calcium carbonate scale inhibition rate (%) 95.8 93.5 94.2 72.4 GB / T16632-2019 Thermal stability test (80℃, after 168h) Scale inhibition rate retention rate (%) 98.6 98.4 98.7 80.1 (Scale inhibition rate after aging / Initial scale inhibition rate) * 100% System appearance Clarity and transparency Clarity and transparency Clarity and transparency Noticeably cloudy with yellow precipitate Visual observation

[0086] 3. Detailed analysis of the results:

[0087] Corrosion Inhibition Performance: As shown in Table 2, in corrosive water with a concentration as high as 1000 mg / L Cl⁻, the corrosion inhibition rates of the three embodiments of this invention all exceeded 94% for carbon steel and 97% for brass. Example 2, due to its higher content of sodium tungstate and benzotriazole, showed the best corrosion inhibition performance (lowest corrosion rate) for copper; Example 1, with its balanced formulation, achieved the best overall corrosion inhibition effect. The corrosion inhibition rate of carbon steel in Comparative Example 1 was only 78.3%, demonstrating that the phosphorus-based formulation's corrosion inhibition film (mainly iron phosphate and calcium phosphate) is not stable enough in a high chloride ion environment, easily penetrated by chloride ions, leading to increased localized corrosion.

[0088] Scale inhibition performance: Under high temperature and high hardness conditions, the scale inhibition rate of calcium carbonate in the embodiments of the present invention is higher than 93%. Example 3, due to its higher content of sodium polyacrylate and HEDP, has a slightly better scale inhibition rate than the other two examples. Comparative Example 1 has a scale inhibition rate of only 72.4%. The reason for this is that the ordinary polyacrylic acid used in it is prone to molecular chain coiling under high temperature and high hardness conditions, resulting in a decrease in scale inhibition and dispersion effects. Furthermore, phosphate ions easily combine with calcium ions to form calcium phosphate scale, which actually promotes deposition.

[0089] Long-lasting stability (core advantage): After 168 hours of thermal aging at 80℃, the scale inhibition performance of the product of this invention retains over 98%, and the solution remains clear, proving its stable chemical structure and that the active ingredients have not undergone significant decomposition or precipitation. Comparative Example 1, on the other hand, only retained 80.1% of its performance and exhibited turbidity and a yellow precipitate. Analysis revealed that this precipitate mainly consisted of zinc phosphate and degraded organophosphonic acid calcium magnesium scale. This directly verifies the "poor chemical stability" issue mentioned in the background section and highlights the superiority of this invention in "ensuring stable and non-decomposing reagent performance."

[0090] Environmental friendliness (indirect verification): The formulation of this invention fundamentally eliminates the introduction of phosphorus, while Comparative Example 1 contains a large amount of phosphates and organophosphonates (HEDP, PBTC), with a high total phosphorus content, posing a clear environmental risk of causing eutrophication of water bodies, and its application is being restricted by increasingly stringent environmental regulations.

[0091] Field application case: (Supplementary example 1 application details)

[0092] An industrial application test was conducted on the circulating water system of an evaporative condenser in a coastal chemical plant. Because the system uses desalinated seawater as makeup water, the chloride ion concentration is consistently high.

[0093] System Overview: Circulating water volume 5000 m³ / h, system holding water volume 800 m³. Makeup water chloride ion 400-800 mg / L, circulating water chloride ion concentration reaches 1600-2500 mg / L, total hardness (calculated as CaCO3) exceeds 1000 mg / L.

[0094] Dosing and Operation: Using the product from Example 1, the system was first cleaned and pre-filmed. During normal operation, the product was continuously added via an automatic dosing pump, controlling the concentration of component A in the circulating water at 70-80 mg / L and the concentration of component B at 45-55 mg / L. The corrosion coating and scale formation in the test tubes were monitored monthly.

[0095] Annual maintenance results (12 months later):

[0096] Visual inspection: Upon opening the condenser end cap, the inner walls of all titanium alloy heat exchange tubes are clean, exhibiting their natural metallic color, with no obvious scale or rust. Only on the surface of some water chamber carbon steel structures, a uniform and dense bluish-gray passivation film is visible.

[0097] Fouling monitoring: The fouling deposition rate in the test tube was <10 mg / cm²·month, which is far below the national standard (≤15 mg / cm²·month).

[0098] Operational benefits: Compared with the previous cycle using the traditional phosphorus-zinc formula, the average condensation temperature difference decreased by 1.5℃, which is estimated to improve heat exchange efficiency by about 8%. No shutdowns for cleaning were scheduled throughout the entire operating year, saving more than 500,000 yuan in cleaning costs and downtime losses.

[0099] Wastewater environmental protection: The total phosphorus content in the system's wastewater is <0.5 mg / L, which meets the strict local wastewater discharge requirements. However, when using traditional formulas, the total phosphorus content in the wastewater is >3 mg / L, requiring additional treatment.

[0100] In summary:

[0101] This invention demonstrates the flexibility and wide applicability of its formulations by providing three targeted formulations (comprehensive, high corrosion inhibition, and economical scale inhibition). Detailed laboratory data and field application examples jointly prove that the environmentally friendly high-performance scale inhibitor and its preparation method provided by this invention successfully solve the key problems pointed out in the background art, such as insufficient performance, poor stability, and environmental unfriendliness of traditional scale inhibitors in high-hardness, high-chlorine water quality. It fully achieves the comprehensive beneficial effects of highly efficient corrosion and scale inhibition, long-term stable operation, environmental friendliness, and significant economic benefits.

[0102] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0103] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly, high-performance scale inhibitor, characterized in that, It consists of component A and component B; in: Component A, by mass fraction, comprises: sodium molybdate 5-15%, sodium tungstate 5-15%, sodium polyacrylate 15-25%, sodium borate 5-15%, zinc sulfate 15-25%, zinc chloride 5-10%, sodium silicate 3-8%, and benzotriazole 2-6%; The B component, by mass fraction, comprises: 15-25% HEDP, 15-25% PBTC, 35-50% AA / AMPS copolymer, and 15-25% deionized water.

2. The environmentally friendly high-performance scale inhibitor according to claim 1, characterized in that, In component A, the mass ratio of sodium molybdate to sodium tungstate is 1:0.8 to 1.

2.

3. The environmentally friendly high-performance scale inhibitor according to claim 1, characterized in that, In component A, the total zinc content of zinc sulfate and zinc chloride accounts for 12-22% of the total mass of component A.

4. The environmentally friendly high-performance scale inhibitor according to claim 1, characterized in that, In component B, the mass ratio of HEDP to PBTC is 1:0.8 to 1.

2.

5. The environmentally friendly high-performance scale inhibitor according to claim 1, characterized in that, The AA / AMPS copolymer has a molar ratio of acrylic acid to AMPS monomer of 2:1 to 4:1 and a molecular weight of 3000 to 8000.

6. The environmentally friendly high-performance scale inhibitor according to claim 1, characterized in that, When using the scale inhibitor, the concentration of component A is 65–80 mg / L and the concentration of component B is 35–60 mg / L.

7. A method for preparing an environmentally friendly high-performance scale inhibitor, used to prepare the environmentally friendly high-performance scale inhibitor as described in any one of claims 1-6, characterized in that, Includes the following steps: S1. Preparation of component A: Add the powders of sodium molybdate, sodium tungstate, sodium polyacrylate, sodium borate, zinc sulfate, zinc chloride, sodium silicate, and benzotriazole to a stainless steel mixer in the specified proportions. Mix and stir at room temperature for 30-60 minutes until homogeneous, then weigh and package. S2. Preparation of component B: Add HEDP, PBTC, AA / AMPS copolymer and deionized water to a container according to the ratio, and stir and mix at 30-50℃ for 40-80 minutes until a homogeneous and transparent solution is formed.

8. The method for preparing an environmentally friendly high-performance scale inhibitor according to claim 7, characterized in that, The mixing speed in S1 is 200-400 r / min.

9. The method for preparing an environmentally friendly high-performance scale inhibitor according to claim 7, characterized in that, The stirring speed in S2 is 100-300 r / min.

10. The application of an environmentally friendly high-performance scale inhibitor, comprising using the environmentally friendly high-performance scale inhibitor as described in any one of claims 1-6, characterized in that, The application of the environmentally friendly high-performance scale inhibitor in corrosion and scale prevention treatment of industrial circulating cooling water systems or evaporative condensers.