A scale inhibition method and scale inhibitor based on synergistic effect of crystal distortion and dispersion

Abstract

This invention relates to the field of scale inhibitor technology, specifically to a scale inhibition method and scale inhibitor based on the synergistic effect of crystal distortion and dispersion. Water samples are collected from the target water system (cooling tower / circulating water / refrigeration unit), and the concentrations of scale-forming ions such as calcium, magnesium, and iron (Ca²⁺≥150mg / L, Mg²⁺≥80mg / L), pH value (7.5~9.0), and alkalinity (200~400mg / L as CaCO₃) are measured. This invention interferes with the nucleation and growth of calcium carbonate and other crystals through crystal distortion, and prevents crystal aggregation through dispersion. The synergistic effect results in a scale inhibition rate of ≥95% (at a total calcium and magnesium ion concentration of 400mg / L), which is more than 30% higher than traditional 18% phosphate scale inhibitors, increasing the total phosphate content to 21%. Simultaneously, through the synergistic effect of the dispersant and crystal distortion agent, excessive phosphorus release is avoided, eliminating the risk of eutrophication.

Description

Technical Field

[0001] This invention relates to the field of scale inhibitor technology, specifically to a scale inhibition method and scale inhibitor based on the synergistic effect of crystal distortion and dispersion. Background Technology

[0002] In industrial circulating water, cooling water, and refrigeration unit water systems, scale-forming ions such as calcium and magnesium easily form hard and dense calcium carbonate, calcium phosphate, and magnesium scale on the surfaces of pipes and equipment, leading to decreased heat exchange efficiency, pipe blockage, and increased energy consumption. Traditional phosphate scale inhibitors (such as sodium hexametaphosphate, sodium pyrophosphate, and sodium tripolyphosphate compound) mainly work by chelating metal ions, but they have significant technical drawbacks:

[0003] Traditional scale inhibitors rely solely on chelation. In water with high hardness and high alkalinity (total calcium and magnesium ions ≥300mg / L), the chelation sites are easily saturated, resulting in a sharp drop in scale inhibition efficiency. Scale-forming ions will still crystallize and precipitate to form hard scale.

[0004] Insufficient crystal control leads to the formation of large-particle scale: the nucleation and growth of crystals such as calcium carbonate cannot be effectively interfered with, and the crystals tend to grow along the dominant crystal plane to form large-particle, high-hardness scale layers that are difficult to remove by water flow.

[0005] Insufficient dispersion performance, easy secondary deposition: Traditional phosphate scale inhibitors have weak dispersion power for micro crystals. The precipitated micro crystals are easy to agglomerate and deposit on the equipment surface, forming secondary scale. After long-term operation, the scale layer continues to thicken.

[0006] Total content is limited, making it difficult to balance environmental protection and performance: The total phosphate content of traditional products is mostly controlled at around 18%. Increasing the content can improve chelation ability, but it will increase the risk of eutrophication of water bodies; if the content is reduced, the scale inhibition performance will be insufficient, and it is impossible to balance environmental protection and high-efficiency scale inhibition.

[0007] Limited applicability and poor adaptability: It can only be adapted to a single type of scale (such as calcium carbonate scale), and its scale inhibition effect is poor for mixed scale (calcium carbonate + calcium phosphate + magnesium scale) and complex working conditions (such as low-temperature scaling of refrigeration units and high-temperature circulating water of cooling towers), and it cannot meet the needs of multiple scenarios.

[0008] Existing technologies have not yet formed a synergistic scale inhibition system of "crystal distortion inhibiting nucleation - dispersion preventing aggregation - efficient chelation of complex ions". The single mechanism leads to a bottleneck in scale inhibition efficiency, which restricts the efficient and stable operation of circulating water systems. To this end, a scale inhibition method and scale inhibitor based on the synergistic effect of crystal distortion and dispersion are proposed. Summary of the Invention

[0009] In view of this, the present invention provides a scale inhibition method and scale inhibitor based on the synergistic effect of crystal distortion and dispersion, so as to solve or alleviate the technical problems existing in the prior art, and at least provide a beneficial option.

[0010] The technical solution of this invention is implemented as follows: a scale inhibition method based on the synergistic effect of crystal distortion and dispersion, step 1: scale-forming ion identification and water pretreatment.

[0011] S1.1 Collect water samples from the target water system (cooling tower / circulating water / refrigeration unit) and test the concentration of scale-forming ions such as calcium, magnesium, and iron (Ca²⁺≥150mg / L, Mg²⁺≥80mg / L), pH value (7.5~9.0), and alkalinity (200~400mg / L as CaCO3).

[0012] S1.2 If the water sample pH is >9.0, add an appropriate amount of citric acid to adjust the pH to 7.5~8.5 to avoid high pH accelerating the crystallization of scale-forming ions; if the water sample turbidity is >5 NTU, pre-treat it with sand filtration to remove suspended solids and reduce impurities from interfering with the scale inhibition effect.

[0013] Step 2: Implementation of Crystal Distortion Scale Inhibition

[0014] S2.1 Add crystal distortion agent (compound phosphate components: sodium hexametaphosphate, sodium pyrophosphate, and sodium tripolyphosphate in a mass ratio of 3:2:2) to the pretreated water sample at a dosage of 150-250 g / t.

[0015] In S2.2, the polyphosphate ions in the crystal distortion agent combine with Ca²⁺ and Mg²⁺, embedding themselves into the calcium carbonate crystal lattice and replacing the Ca²⁺ positions in the lattice, resulting in crystal lattice distortion, hindered crystal face growth, and inhibition of the formation of large hard scale particles.

[0016] S2.3 Control the reaction time to 5-10 min to ensure that the crystal distortion agent fully reacts with the scale-forming ions, so that the crystal particle size is controlled to ≤5μm and large scale crystals are avoided.

[0017] Step 3: Implementation of the dispersing and synergistic scale inhibition effect

[0018] S3.1 Add a dispersant (maleic acid-acrylic acid copolymer and sodium polyepoxysuccinate compounded in a mass ratio of 1:1) to the water sample at a dosage of 50-100 g / t.

[0019] S3.2 Dispersant forms a charged protective layer on the surface of the distorted microcrystals through electrostatic repulsion and steric hindrance, preventing the aggregation and deposition between crystals, so that the microcrystals are stably dispersed in water and discharged from the system with the water flow;

[0020] S3.3 Control the stirring speed to 300~500r / min and the stirring time to 3~5min to ensure that the dispersant uniformly coats the crystals, the dispersion stability is ≥24h, and there is no secondary deposition;

[0021] Step 4: Long-lasting scale inhibition and system maintenance

[0022] S4.1 Continuously monitor the total phosphate content (maintained at 20%–22%) and scale-forming ion concentration in the water system, and dynamically adjust the scale inhibitor dosage according to changes in water quality;

[0023] S4.2 Every 30 days of operation, the water system should be flushed to remove the tiny crystals dispersed in the water and prevent long-term accumulation that could lead to secondary scaling.

[0024] S4.3 Regularly check the scale thickness on the equipment surface. If the scale thickness is >0.1mm, appropriately increase the scale inhibitor dosage to 250g / t to enhance the scale inhibition effect.

[0025] More preferably, the scale inhibition method is applicable to water systems such as cooling towers, circulating water, refrigeration units, and boilers, and has a scale inhibition rate of ≥95% for various types of scale such as calcium carbonate, calcium phosphate, magnesium scale, and rust scale.

[0026] Further preferred, the water system operating according to the method has a scale-forming ion concentration of ≤50mg / L, a scale layer thickness on the equipment surface of ≤0.05mm, and a continuous operating time of ≥8000h.

[0027] A scale inhibitor based on the synergistic effect of crystal distortion and dispersion, comprising, by weight parts:

[0028] (1) Composite phosphate crystal distortion agent: 9 parts sodium hexametaphosphate, 6 parts sodium pyrophosphate, 6 parts sodium tripolyphosphate, with a total phosphate content of 21%, providing core crystal distortion effect;

[0029] (2) High-efficiency dispersant: 4 parts maleic acid-acrylic acid copolymer and 4 parts sodium polyepoxysuccinate provide a synergistic dispersing effect and prevent crystal agglomeration;

[0030] (3) Stabilizer: 2 parts of hydroxyethylidene diphosphonic acid (HEDP) and 1 part of benzotriazole to improve product stability and corrosion inhibition performance;

[0031] (4) Solvent: Add deionized water to 100 parts to adjust the product to be a colorless or pale yellow transparent liquid with a density of 1.12~1.18.

[0032] More preferably, the mass ratio of sodium hexametaphosphate, sodium pyrophosphate, and sodium tripolyphosphate in the composite phosphate is 3:2:2. This ratio has the strongest crystal distortion effect, which can make the calcium carbonate crystal distortion rate ≥85%.

[0033] More preferably, the mass ratio of maleic acid-acrylic acid copolymer to sodium polyepoxysuccinate in the high-efficiency dispersant is 1:1. This ratio provides the best dispersion performance and can ensure the dispersion stability of the microcrystals for ≥24h.

[0034] More preferably, the mass ratio of the stabilizer HEDP to benzotriazole is 2:1, which can simultaneously improve the chemical stability of the scale inhibitor and its corrosion inhibition performance on metal pipelines, with a corrosion inhibition rate ≥90%.

[0035] More preferably, the scale inhibitor is a colorless or pale yellow transparent liquid with a total phosphate content of 20% to 22%, a density of 1.12 to 1.18, a maximum safe dosage of 250 g / t, and a shelf life of 3 years.

[0036] A method for preparing a scale inhibitor based on the synergistic effect of crystal distortion and dispersion includes the following steps:

[0037] Step 1: Raw material pretreatment

[0038] S1.1 Sodium hexametaphosphate, sodium pyrophosphate, and sodium tripolyphosphate are pulverized to a particle size ≤100μm to remove agglomerated impurities;

[0039] S1.2 Dissolve maleic acid-acrylic acid copolymer, sodium polyepoxysuccinate, HEDP, and benzotriazole in a small amount of deionized water to prepare a 50% concentration mother liquor for later use;

[0040] Step 2: Stepwise dissolution and compounding

[0041] S2.1 Add 60% to 70% of the formula amount of deionized water to the reactor, heat to 40 to 50°C, and start stirring (300 to 400 r / min).

[0042] S2.2 Add sodium hexametaphosphate, sodium pyrophosphate and sodium tripolyphosphate in sequence, stir for 20-30 min until completely dissolved to obtain a complex phosphate solution;

[0043] S2.3 Add the dispersant stock solution and stabilizer stock solution in sequence, and continue stirring for 30-40 minutes until completely mixed;

[0044] S2.4 Add the remaining deionized water, adjust the product density to 1.12~1.18, stir for 10~15 minutes, and obtain a colorless or light yellow transparent liquid scale inhibitor product;

[0045] Step 3: Quality Inspection and Filling

[0046] S3.1 Test the total phosphate content (20%~22%), density (1.12~1.18), appearance (colorless or pale yellow transparent liquid), corrosion inhibition rate (≥90%), and scale inhibition rate (≥95%) of the finished product.

[0047] After passing the S3.2 test, the product is filled into 15Kg / barrel packaging drums, sealed, and stored in a cool, dry place.

[0048] Further preferably, the temperature of the reactor in step S2.1 is controlled at 40~50℃, which can accelerate the dissolution of phosphate, avoid clumping, and improve the uniformity of mixing.

[0049] The embodiments of the present invention have the following advantages due to the adoption of the above technical solutions:

[0050] I. This invention interferes with the nucleation and growth of calcium carbonate and other crystals through crystal distortion, and prevents crystal aggregation through dispersion. Together, they achieve a scale inhibition rate of ≥95% (in water with a total calcium and magnesium ion content of 400 mg / L), which is more than 30% higher than the traditional 18% phosphate scale inhibitor. The total phosphate content is increased to 21%. At the same time, through the synergistic effect of dispersant and crystal distortion agent, excessive release of phosphorus is avoided, and there is no risk of eutrophication.

[0051] II. This invention can simultaneously inhibit multiple types of scale, such as calcium carbonate, calcium phosphate, magnesium scale, and rust scale, with a scale inhibition rate of ≥95% for mixed scale. It is suitable for water systems in various scenarios such as cooling towers, circulating water, refrigeration units, and boilers. The product is a colorless or light yellow transparent liquid with a density of 1.12~1.18, good fluidity, and easy dissolution in water. The maximum safe dosage can be extended to 250g / t. The addition operation is simple and does not require complicated pretreatment.

[0052] Third, this invention improves stability through formula optimization, extends shelf life to 3 years, does not stratify or precipitate when stored in a cool and dry place, does not have secondary deposition after long-term use, and has a continuous operating time of ≥8000h. It adopts room temperature compounding and step-by-step dissolution process, which does not require high temperature and high pressure equipment, and the production cost is reduced by 10% to 15% compared with traditional scale inhibitors, making it suitable for industrial mass production.

[0053] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1This is a flowchart of the method of the present invention. Detailed Implementation

[0056] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0057] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0058] like Figure 1 As shown, this embodiment of the invention provides a scale inhibition method based on the synergistic effect of crystal distortion and dispersion. Step 1: Scale-forming ion identification and water pretreatment.

[0059] S1.1 Collect water samples from the target water system (cooling tower / circulating water / refrigeration unit) and test the concentration of scale-forming ions such as calcium, magnesium, and iron (Ca²⁺≥150mg / L, Mg²⁺≥80mg / L), pH value (7.5~9.0), and alkalinity (200~400mg / L as CaCO3).

[0060] S1.2 If the water sample pH > 9.0, add an appropriate amount of citric acid to adjust the pH to 7.5~8.5 to avoid high pH accelerating the crystallization of scale-forming ions; if the water sample turbidity > 5 NTU, pre-treat by sand filtration to remove suspended solids and reduce impurities from interfering with the scale inhibition effect.

[0061] Step 2: Implementation of Crystal Distortion Scale Inhibition

[0062] S2.1 Add crystal distortion agent (compound phosphate components: sodium hexametaphosphate, sodium pyrophosphate, and sodium tripolyphosphate in a mass ratio of 3:2:2) to the pretreated water sample at a dosage of 150-250 g / t.

[0063] In S2.2, the polyphosphate ions in the crystal distortion agent combine with Ca²⁺ and Mg²⁺, embedding themselves into the calcium carbonate crystal lattice and replacing the Ca²⁺ positions in the lattice, resulting in crystal lattice distortion, hindered crystal face growth, and inhibition of the formation of large hard scale particles.

[0064] S2.3 Control the reaction time to 5-10 min to ensure that the crystal distortion agent fully interacts with the scale-forming ions, so that the crystal particle size is controlled to ≤5μm and large scale crystals are avoided.

[0065] Step 3: Implementation of the dispersing and synergistic scale inhibition effect

[0066] S3.1 Add a dispersant (maleic acid-acrylic acid copolymer and sodium polyepoxysuccinate compounded in a mass ratio of 1:1) to the water sample at a dosage of 50-100 g / t.

[0067] S3.2 Dispersant forms a charged protective layer on the surface of the distorted microcrystals through electrostatic repulsion and steric hindrance, preventing the aggregation and deposition between crystals, so that the microcrystals are stably dispersed in water and discharged from the system with the water flow;

[0068] S3.3 Control the stirring speed to 300~500r / min and the stirring time to 3~5min to ensure that the dispersant uniformly coats the crystals, the dispersion stability is ≥24h, and there is no secondary deposition.

[0069] Step 4: Long-lasting scale inhibition and system maintenance

[0070] S4.1 Continuously monitor the total phosphate content (maintained at 20%–22%) and scale-forming ion concentration in the water system, and dynamically adjust the scale inhibitor dosage according to changes in water quality;

[0071] S4.2 Every 30 days of operation, the water system should be flushed to remove the tiny crystals dispersed in the water and prevent long-term accumulation that could lead to secondary scaling.

[0072] S4.3 Regularly check the scale thickness on the equipment surface. If the scale thickness is >0.1mm, appropriately increase the scale inhibitor dosage to 250g / t to enhance the scale inhibition effect.

[0073] In one embodiment, the scale inhibition method is applicable to water systems such as cooling towers, circulating water, refrigeration units, and boilers, and has a scale inhibition rate of ≥95% for various types of scale such as calcium carbonate, calcium phosphate, magnesium scale, and rust scale.

[0074] In one embodiment, the water system operated according to the method has a scale-forming ion concentration of ≤50mg / L, a scale layer thickness on the equipment surface of ≤0.05mm, and a continuous operating time of ≥8000h.

[0075] A scale inhibitor based on the synergistic effect of crystal distortion and dispersion, comprising, by weight parts:

[0076] (1) Composite phosphate crystal distortion agent: 9 parts sodium hexametaphosphate, 6 parts sodium pyrophosphate, 6 parts sodium tripolyphosphate, with a total phosphate content of 21%, providing core crystal distortion effect;

[0077] (2) High-efficiency dispersant: 4 parts maleic acid-acrylic acid copolymer and 4 parts sodium polyepoxysuccinate provide a synergistic dispersing effect and prevent crystal agglomeration;

[0078] (3) Stabilizer: 2 parts of hydroxyethylidene diphosphonic acid (HEDP) and 1 part of benzotriazole to improve product stability and corrosion inhibition performance;

[0079] (4) Solvent: Add deionized water to 100 parts to adjust the product to be a colorless or pale yellow transparent liquid with a density of 1.12~1.18.

[0080] In one embodiment, the mass ratio of sodium hexametaphosphate, sodium pyrophosphate, and sodium tripolyphosphate in the composite phosphate is 3:2:2. This ratio has the strongest crystal distortion effect, which can make the calcium carbonate crystal distortion rate ≥85%.

[0081] In one embodiment, the mass ratio of maleic acid-acrylic acid copolymer to sodium polyepoxysuccinate in the high-efficiency dispersant is 1:1. This ratio provides the best dispersion performance and ensures that the dispersion stability of the microcrystals is ≥24h.

[0082] In one embodiment, the mass ratio of stabilizer HEDP to benzotriazole is 2:1, which can simultaneously improve the chemical stability of the scale inhibitor and its corrosion inhibition performance on metal pipes, with a corrosion inhibition rate of ≥90%.

[0083] In one embodiment, the scale inhibitor is a colorless or pale yellow transparent liquid with a total phosphate content of 20% to 22%, a density of 1.12 to 1.18, a maximum safe dosage of 250 g / t, and a shelf life of 3 years.

[0084] A method for preparing a scale inhibitor based on the synergistic effect of crystal distortion and dispersion includes the following steps:

[0085] Step 1: Raw material pretreatment

[0086] S1.1 Sodium hexametaphosphate, sodium pyrophosphate, and sodium tripolyphosphate are pulverized to a particle size ≤100μm to remove agglomerated impurities;

[0087] S1.2 Dissolve maleic acid-acrylic acid copolymer, sodium polyepoxysuccinate, HEDP, and benzotriazole in a small amount of deionized water to prepare a 50% concentration mother liquor for later use.

[0088] Step 2: Stepwise dissolution and compounding

[0089] S2.1 Add 60% to 70% of the formula amount of deionized water to the reactor, heat to 40 to 50°C, and start stirring (300 to 400 r / min).

[0090] S2.2 Add sodium hexametaphosphate, sodium pyrophosphate and sodium tripolyphosphate in sequence, stir for 20-30 min until completely dissolved to obtain a complex phosphate solution;

[0091] S2.3 Add the dispersant stock solution and stabilizer stock solution in sequence, and continue stirring for 30-40 minutes until completely mixed;

[0092] S2.4 Add the remaining deionized water, adjust the product density to 1.12~1.18, stir for 10~15 minutes, and obtain a colorless or light yellow transparent liquid scale inhibitor product.

[0093] Step 3: Quality Inspection and Filling

[0094] S3.1 Test the total phosphate content (20%~22%), density (1.12~1.18), appearance (colorless or pale yellow transparent liquid), corrosion inhibition rate (≥90%), and scale inhibition rate (≥95%) of the finished product.

[0095] After passing the S3.2 test, the product is filled into 15Kg / barrel packaging drums, sealed, and stored in a cool, dry place.

[0096] In one embodiment, the temperature of the reactor in step S2.1 is controlled at 40~50℃, which can accelerate the dissolution of phosphate, prevent clumping, and improve the uniformity of mixing.

[0097] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method of scale inhibition based on synergistic effect of crystal distortion and dispersion, characterized in that: Step 1: Scale-forming ion identification and water pretreatment S1.1 Collect water samples from the target water system (cooling tower / circulating water / refrigeration unit) and test the concentration of scale-forming ions such as calcium, magnesium, and iron (Ca²⁺≥150mg / L, Mg²⁺≥80mg / L), pH value (7.5~9.0), and alkalinity (200~400mg / L as CaCO3). S1.2 If the water sample pH is >9.0, add an appropriate amount of citric acid to adjust the pH to 7.5~8.5 to avoid high pH accelerating the crystallization of scale-forming ions; if the water sample turbidity is >5 NTU, pre-treat it with sand filtration to remove suspended solids and reduce impurities from interfering with the scale inhibition effect. Step 2: Implementation of Crystal Distortion Scale Inhibition S2.1 Add crystal distortion agent (compound phosphate components: sodium hexametaphosphate, sodium pyrophosphate, and sodium tripolyphosphate in a mass ratio of 3:2:2) to the pretreated water sample at a dosage of 150-250 g / t. In S2.2, the polyphosphate ions in the crystal distortion agent combine with Ca²⁺ and Mg²⁺, embedding themselves into the calcium carbonate crystal lattice and replacing the Ca²⁺ positions in the lattice, resulting in crystal lattice distortion, hindered crystal face growth, and inhibition of the formation of large hard scale particles. S2.3 Control the reaction time to 5-10 min to ensure that the crystal distortion agent fully reacts with the scale-forming ions, so that the crystal particle size is controlled to ≤5μm and large scale crystals are avoided. Step 3: Implementation of the dispersing and synergistic scale inhibition effect S3.1 Add a dispersant (maleic acid-acrylic acid copolymer and sodium polyepoxysuccinate compounded in a mass ratio of 1:1) to the water sample at a dosage of 50-100 g / t. S3.2 Dispersant forms a charged protective layer on the surface of the distorted microcrystals through electrostatic repulsion and steric hindrance, preventing the aggregation and deposition between crystals, so that the microcrystals are stably dispersed in water and discharged from the system with the water flow; S3.3 Control the stirring speed to 300~500r / min and the stirring time to 3~5min to ensure that the dispersant uniformly coats the crystals, the dispersion stability is ≥24h, and there is no secondary deposition; Step 4: Long-lasting scale inhibition and system maintenance S4.1 Continuously monitor the total phosphate content (maintained at 20%–22%) and scale-forming ion concentration in the water system, and dynamically adjust the scale inhibitor dosage according to changes in water quality; S4.2 Every 30 days of operation, the water system should be flushed to remove the tiny crystals dispersed in the water and prevent long-term accumulation that could lead to secondary scaling. S4.3 Regularly check the scale thickness on the equipment surface. If the scale thickness is >0.1mm, appropriately increase the scale inhibitor dosage to 250g / t to enhance the scale inhibition effect.

2. A method of scale inhibition based on synergistic effect of crystal distortion and dispersion as claimed in claim 1, wherein: The scale inhibition method is applicable to water systems such as cooling towers, circulating water, refrigeration units, and boilers, and has a scale inhibition rate of ≥95% for various types of scale, including calcium carbonate, calcium phosphate, magnesium scale, and rust scale.

3. A method of scale inhibition based on synergistic effect of crystal distortion and dispersion as claimed in claim 1, wherein: The water system operated according to the method has a stable scale-forming ion concentration of ≤50mg / L, a scale layer thickness of ≤0.05mm on the equipment surface, and a continuous operating time of ≥8000h.

4. A scale inhibitor based on the synergistic effect of crystal distortion and dispersion, which is matched with a scale inhibition method based on the synergistic effect of crystal distortion and dispersion as claimed in any one of claims 1-3, characterized in that: By weight, the formula comprises: (1) Composite phosphate crystal distortion agent: 9 parts sodium hexametaphosphate, 6 parts sodium pyrophosphate, 6 parts sodium tripolyphosphate, with a total phosphate content of 21%, providing core crystal distortion effect; (2) High-efficiency dispersant: 4 parts maleic acid-acrylic acid copolymer and 4 parts sodium polyepoxysuccinate provide a synergistic dispersing effect and prevent crystal agglomeration; (3) Stabilizer: 2 parts of hydroxyethylidene diphosphonic acid (HEDP) and 1 part of benzotriazole to improve product stability and corrosion inhibition performance; (4) Solvent: Add deionized water to 100 parts to adjust the product to be a colorless or pale yellow transparent liquid with a density of 1.12~1.

18.

5. A scale inhibitor based on the synergistic effect of crystal distortion and dispersion according to claim 4, characterized in that: The mass ratio of sodium hexametaphosphate, sodium pyrophosphate, and sodium tripolyphosphate in the composite phosphate is 3:2:

2. This ratio has the strongest crystal distortion effect, which can make the calcium carbonate crystal distortion rate ≥85%.

6. A scale inhibitor based on the synergistic effect of crystal distortion and dispersion according to claim 4, characterized in that: The mass ratio of maleic acid-acrylic acid copolymer to sodium polyepoxysuccinate in the high-efficiency dispersant is 1:

1. This ratio provides the best dispersion performance and can ensure the dispersion stability of microcrystals ≥24h.

7. A scale inhibitor based on the synergistic effect of crystal distortion and dispersion according to claim 4, characterized in that: The stabilizer HEDP and benzotriazole have a mass ratio of 2:1, which can simultaneously improve the chemical stability of the scale inhibitor and its corrosion inhibition performance on metal pipelines, with a corrosion inhibition rate of ≥90%.

8. A scale inhibitor based on the synergistic effect of crystal distortion and dispersion according to claim 4, characterized in that: The scale inhibitor is a colorless or pale yellow transparent liquid with a total phosphate content of 20% to 22%, a density of 1.12 to 1.18, a maximum safe dosage of 250 g / t, and a shelf life of 3 years.

9. A method for preparing a scale inhibitor based on the synergistic effect of crystal distortion and dispersion, in conjunction with the scale inhibitor based on the synergistic effect of crystal distortion and dispersion as described in claim 4, characterized in that: Includes the following steps: Step 1: Raw material pretreatment S1.1 Sodium hexametaphosphate, sodium pyrophosphate, and sodium tripolyphosphate are pulverized to a particle size ≤100μm to remove agglomerated impurities; S1.2 Dissolve maleic acid-acrylic acid copolymer, sodium polyepoxysuccinate, HEDP, and benzotriazole in a small amount of deionized water to prepare a 50% concentration mother liquor for later use; Step 2: Stepwise dissolution and compounding S2.1 Add 60% to 70% of the formula amount of deionized water to the reactor, heat to 40 to 50°C, and start stirring (300 to 400 r / min). S2.2 Add sodium hexametaphosphate, sodium pyrophosphate and sodium tripolyphosphate in sequence, stir for 20-30 min until completely dissolved to obtain a complex phosphate solution; S2.3 Add the dispersant stock solution and stabilizer stock solution in sequence, and continue stirring for 30-40 minutes until completely mixed; S2.4 Add the remaining deionized water, adjust the product density to 1.12~1.18, stir for 10~15 minutes, and obtain a colorless or light yellow transparent liquid scale inhibitor product; Step 3: Quality Inspection and Filling S3.1 Test the total phosphate content (20%~22%), density (1.12~1.18), appearance (colorless or pale yellow transparent liquid), corrosion inhibition rate (≥90%), and scale inhibition rate (≥95%) of the finished product. After passing the S3.2 test, the product is filled into 15Kg / barrel packaging drums, sealed, and stored in a cool, dry place.

10. The method for preparing a scale inhibitor based on the synergistic effect of crystal distortion and dispersion according to claim 9, characterized in that: In step S2.1, the temperature of the reactor is controlled at 40~50℃, which can accelerate the dissolution of phosphate, prevent clumping, and improve the uniformity of mixing.

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