High temperature resistant and environmentally friendly micro-nano anti-scaling material and preparation method thereof

Abstract

The present invention relates to the technical field of water treatment, in particular, to a high temperature resistant and environmentally friendly micro-nano scale-inhibiting material and a preparation method thereof. The material comprises the following raw materials: isopropyl alcohol, benzoyl peroxide, activated carbon, oxalic acid, ammonia water, calcium oxide, a water-soluble lubricant, a filler, and an epoxy resin. In the present invention, the scale attached to the inner wall of the pipeline is dissolved by components such as isopropyl alcohol and benzoyl peroxide, and then adsorbed by components such as ammonium oxalate and activated carbon, and the ammonium oxalate is hydrolyzed to generate oxalic acid and ammonia. Under the action of the high temperature environment in the pipeline, the isopropyl alcohol is oxidized to generate hydrogen peroxide, and the hydrogen peroxide is then reacted with oxalic acid, ammonium oxalate, and ammonia to generate gas and released in the form of micro-nano bubbles. The micro-nano bubbles can flush the scale inside the pipeline and improve the descaling efficiency. The micro-nano bubbles have a large specific surface area, a long residence time, and high interfacial activity, which can improve the scale-inhibiting performance of the material.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, in particular to a high temperature resistant and environmentally friendly micro-nano scale inhibition material and a preparation method thereof. Background Art

[0002] The main function of scale inhibitors is to prevent or reduce the formation of scale by calcium, magnesium and other ions in water, thereby protecting water treatment equipment and pipelines from scaling and blockage. Scale inhibitors are divided into three categories: inorganic scale inhibitors, organic scale inhibitors and composite scale inhibitors according to their chemical composition and mechanism of action.

[0003] For example, CN114560571A relates to a solid slow-release scale inhibitor material and a preparation method thereof, which is made of the following components in weight percentage: 30-80% scale inhibitor, 5-40% filler, 5-15% inorganic silicate binder, and 5-15% organic binder. The above invention prepares a solid scale inhibitor by immobilizing the scale inhibitor active ingredient on a substrate, and then adopts a binary granulation by mixing an inorganic silicate binder and an organic binder. The inorganic silicate binder creates a microporous slow-release structure to ensure that the solid particles after granulation do not collapse when immersed in water for a long time. The organic binder controls the slow and stable release of the scale inhibitor active ingredient by microscopically wrapping the solid particles, thereby achieving a long-term scale inhibition function.

[0004] However, when solid slow-release scale inhibitors are used in high-temperature environments such as hot water supply systems, the inorganic silicate binder will dissolve at high temperatures. In addition, heat will accelerate the degradation rate of the solid slow-release scale inhibitors, affecting the scale removal effect and greatly reducing the service life. In addition, when there is a lot of scale accumulated on the pipe wall in the hot water supply system, the above-mentioned solid slow-release scale inhibitors can only remove the scale on the surface, but cannot remove the deep scale inside. It requires multiple cleanings to remove, and the cost of use is high.

[0005] In order to achieve good scale removal effect under high temperature environment, a high temperature resistant and environmentally friendly micro-nano scale inhibition material and a preparation method thereof are proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a high temperature resistant and environmentally friendly micro-nano scale inhibition material and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0007] To achieve the above object, one of the objects of the present invention is to provide a high temperature resistant and environmentally friendly micro-nano scale inhibition material, comprising the following raw materials in parts by weight:

[0008] 30-50 parts by weight of isopropyl alcohol, 3-9 parts by weight of benzoyl peroxide, 5-10 parts by weight of activated carbon, 16-26 parts by weight of oxalic acid, 8-15 parts by weight of aqueous ammonia, 5-10 parts by weight of calcium oxide, 4-8 parts by weight of a water-soluble lubricant, 3-8 parts by weight of a filler, and 7-15 parts by weight of an epoxy resin.

[0009] As a further improvement of the present technical solution, the water-soluble lubricant is 1,2-propylene glycol.

[0010] As a further improvement of the technical solution, the filler includes diatomaceous earth and bentonite, and the mass ratio of diatomaceous earth to bentonite is 1:1.

[0011] As a further improvement of the present technical solution, the activated carbon is a synthetic material activated carbon with a pore diameter greater than 2 nanometers and less than 50 nanometers.

[0012] The second object of the present invention is to provide a method for preparing the above-mentioned high temperature resistant and environmentally friendly micro-nano scale inhibition material, comprising the following steps:

[0013] S1. Weigh the raw materials, mix oxalic acid with water and stir at room temperature to form a solution, then add ammonia water to the solution, stir well and let stand;

[0014] S2, removing the slag from the solution and then cooling and crystallizing to obtain crystals, and mixing and grinding the crystals with activated carbon, calcium oxide, and a filler to obtain crystalline powder;

[0015] S3, fully mixing isopropyl alcohol, benzoyl peroxide, epoxy resin and water-soluble lubricant, and freezing to obtain a lyophilized product;

[0016] S4. The freeze-dried product is ground into powder after vacuum treatment, mixed with crystallized powder, and then granulated by dry method to obtain the anti-scaling material, which is sealed and stored.

[0017] As a further improvement of the technical solution, in S1, aqueous ammonia is added to the solution by a mechanical mixing and dosing stirrer, and the stirring speed range of the mechanical mixing and dosing stirrer is 65-135 rpm.

[0018] As a further improvement of the technical solution, in S2, solid impurities in the solution are filtered out by a filter element, and the filtering accuracy range is 10-40 microns.

[0019] As a further improvement of the technical solution, in S3, the freezing temperature range during the freezing treatment is -30-15°C.

[0020] As a further improvement of the technical solution, in S4, the vacuum degree during vacuum treatment ranges from 40 to 80 Pa.

[0021] As a further improvement of the technical solution, in S4, the gap between the rollers during dry granulation is in the range of 0.05-0.25 mm.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In the high temperature resistant and environmentally friendly micro-nano scale-inhibiting material and its preparation method, oxalic acid and ammonia water are combined to generate ammonium oxalate which can effectively degrade organic matter and heavy metal ions in water, and then mixed with activated carbon and calcium oxide which have good adsorption properties and can absorb organic matter and heavy metal ions in water to form crystalline powder, and then freeze-dried with isopropyl alcohol, benzoyl peroxide and other components which have certain solubility and can dissolve some organic pollutants in water to obtain another component, which is then ground into powder and mixed with the crystalline powder to prepare the scale-inhibiting material through granulation.

[0024] After the scale-inhibiting material is put into the pipeline, the isopropyl alcohol, benzoyl peroxide and other ingredients in the material will dissolve the scale attached to the inner wall of the pipeline, and then the ammonium oxalate, activated carbon and other ingredients will adsorb it. The ammonium oxalate will hydrolyze to produce oxalic acid and ammonia. Under the high temperature environment in the pipeline, the isopropyl alcohol will be oxidized to produce hydrogen peroxide, which will then react with oxalic acid, ammonium oxalate and ammonia to produce gas and release it in the form of micro-nano bubbles. The micro-nano bubbles can penetrate into the tiny gaps inside the pipeline. When the micro-nano bubbles burst, they will generate a strong impact force to flush the scale inside the pipeline and improve the descaling efficiency. In addition, the large specific surface area, long residence time and high interfacial activity of the micro-nano bubbles can improve the scale-inhibiting performance of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a preparation flow chart of the present invention;

[0026] Figure 2 The descaling efficiency test of the present invention Figure 1 ;

[0027] Figure 3 The descaling efficiency test of the present invention Figure 2 . DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The hot water supply system is one of the main scenarios for transporting hot water. Whether it is a home or commercial place, the hot water supply system needs to use pipe materials that can withstand high temperatures. The scale in the hot water supply system is mainly formed by minerals in the water such as calcium and magnesium during the heating process. These minerals will form water-insoluble precipitates at high temperatures, namely scale. Scale will become harder and more difficult to dissolve at high temperatures.

[0030] Existing solid and liquid descaling materials cannot penetrate deep into the scale. When there is a lot of scale accumulated on the pipe wall, the above-mentioned descaling materials can only remove the scale on the surface, but cannot remove the deep scale inside. It takes multiple cleanings to remove it, the cleaning effect is poor, and the cost of use is high.

[0031] Therefore, one of the purposes of the present invention is to provide a high temperature resistant and environmentally friendly micro-nano scale inhibition material, comprising the following raw materials in parts by weight:

[0032] 30-50 parts by weight of isopropyl alcohol, 3-9 parts by weight of benzoyl peroxide, 5-10 parts by weight of activated carbon, 16-26 parts by weight of oxalic acid, 8-15 parts by weight of aqueous ammonia, 5-10 parts by weight of calcium oxide, 4-8 parts by weight of a water-soluble lubricant, 3-8 parts by weight of a filler, and 7-15 parts by weight of an epoxy resin.

[0033] Furthermore, the water-soluble lubricant is 1,2-propylene glycol. The water-soluble lubricant can form an effective protective layer to prevent the surface of the material from being corroded by moisture, chemicals and other corrosive substances. When used, it can penetrate and decompose stains, grease and other dirt to help remove stains and keep the surface of the object clean. In this embodiment, 1,2-propylene glycol is used to extend the shelf life of the material. It can be dissolved in water when used to avoid the generation of new impurities.

[0034] Fillers include diatomaceous earth and bentonite, and the mass ratio of diatomaceous earth and bentonite is 1:1. The setting of fillers can enhance material performance, reduce costs and improve texture. Diatomaceous earth can absorb and remove grease and dirt due to its porous structure, and can improve the descaling effect, while bentonite expands by absorbing water, thereby enhancing the adhesion and cleaning effect of the descaling agent.

[0035] Activated carbon is a synthetic activated carbon with a pore diameter greater than 2 nanometers and less than 50 nanometers. Synthetic activated carbon refers to activated carbon made from organic polymer materials such as synthetic resins, plastics, and rubber. Its pore structure is controllable, and the pore diameter of 2-50 nanometers can form a continuous pore structure, which helps the diffusion and transmission of adsorbate molecules inside the activated carbon and enhances the performance of adsorbing scale.

[0036] The second object of the present invention is to provide a method for preparing the above-mentioned high temperature resistant and environmentally friendly micro-nano scale inhibition material, and the specific steps are as follows:

[0037] S1. After weighing the raw materials, oxalic acid is mixed with water at room temperature to form a solution, and then ammonia water is added to the solution through a mechanical mixing and dosing stirrer, and the solution is fully stirred and then allowed to stand. The stirring speed range of the mechanical mixing and dosing stirrer is 65-135rpm to ensure that the ammonia water can fully react with the oxalic acid solution;

[0038] S2, removing the residue from the solution through a filter element, cooling and crystallizing to obtain crystals, and mixing and grinding the crystals with activated carbon, calcium oxide, and a filler to obtain crystalline powder, wherein the filtration accuracy range of the solid impurities in the solution when filtered out by the filter element is 10-40 microns;

[0039] S3, fully mixing isopropyl alcohol, benzoyl peroxide, epoxy resin and water-soluble lubricant, and freezing to obtain a lyophilized product, wherein the freezing temperature range of the freezing treatment is -30-15°C;

[0040] S4. The freeze-dried material is ground into powder after vacuum treatment and mixed with crystallized powder, and then the anti-scaling material is obtained by dry granulation and sealed for storage. It is worth noting that the vacuum degree range during vacuum treatment is 40-80Pa, which ensures that the moisture content in the material is at a low level;

[0041] The specific process of dry granulation is to use a dry granulator to send the mixed material between two rollers through a screw rod, and adjust the pressure of the rollers to press the material into thin sheets with a certain hardness. The pressed thin sheets are then sheared and crushed, and sieved to obtain scale-inhibiting materials. The roller gap range during dry granulation is 0.05-0.25 mm. If the gap is too small, the material will be too close, resulting in poor granulation effect and easy clogging; if it is too large, the material will be scattered, resulting in uneven particles.

[0042] The high temperature resistant and environmentally friendly micro-nano antiscaling material and the preparation method thereof provided by the present invention are further described through the following specific examples.

[0043] Embodiment 1:

[0044] S1, 30 parts by weight of isopropanol, 9 parts by weight of benzoyl peroxide, 5 parts by weight of activated carbon, 26 parts by weight of oxalic acid, 8 parts by weight of ammonia water, 10 parts by weight of calcium oxide, 4 parts by weight of water-soluble lubricant, 8 parts by weight of filler, and 7 parts by weight of epoxy resin, after the oxalic acid is mixed with water and stirred at room temperature to form a solution, ammonia water is added to the solution by a mechanical mixing and dosing stirrer, the solution is fully stirred and then allowed to stand, the stirring speed of the mechanical mixing and dosing stirrer is 135 rpm, wherein the water-soluble lubricant is 1,2-propylene glycol, the filler includes diatomaceous earth and bentonite, and the mass ratio of diatomaceous earth and bentonite is 1:1, and the activated carbon is a synthetic material activated carbon with a pore diameter greater than 2 nanometers and less than 50 nanometers;

[0045] S2, removing the residue from the solution through a filter element, cooling and crystallizing to obtain crystals, and mixing and grinding the crystals with activated carbon, calcium oxide, and a filler to obtain crystalline powder, wherein the filtration accuracy when filtering out solid impurities in the solution through the filter element is 10 microns;

[0046] S3, fully mixing isopropyl alcohol, benzoyl peroxide, epoxy resin and water-soluble lubricant, and freezing to obtain a lyophilized product, wherein the freezing temperature during the freezing treatment is -15°C;

[0047] S4. The freeze-dried material is ground into powder after vacuum treatment and mixed with crystallized powder, and then the anti-scaling material is obtained by dry granulation and sealed for storage. It is worth noting that the vacuum degree during vacuum treatment is 40Pa, and the gap between the rollers during dry granulation is 0.25 mm.

[0048] Embodiment 2:

[0049] S1, 40 parts by weight of isopropanol, 6 parts by weight of benzoyl peroxide, 8 parts by weight of activated carbon, 21 parts by weight of oxalic acid, 12 parts by weight of ammonia water, 7 parts by weight of calcium oxide, 6 parts by weight of a water-soluble lubricant, 6 parts by weight of a filler, and 11 parts by weight of an epoxy resin, after the oxalic acid is mixed with water and stirred at room temperature to form a solution, ammonia water is added to the solution by a mechanical mixing and dosing stirrer, the solution is fully stirred and then allowed to stand, the stirring speed of the mechanical mixing and dosing stirrer is 85 rpm, wherein the water-soluble lubricant is 1,2-propylene glycol, the filler includes diatomaceous earth and bentonite, and the mass ratio of diatomaceous earth and bentonite is 1:1, and the activated carbon is a synthetic material activated carbon with a pore diameter greater than 2 nanometers and less than 50 nanometers;

[0050] S2, removing the residue from the solution through a filter element, cooling and crystallizing to obtain crystals, and mixing and grinding the crystals with activated carbon, calcium oxide, and a filler to obtain crystalline powder, wherein the filtration accuracy when filtering out solid impurities in the solution through the filter element is 30 microns;

[0051] S3, fully mixing isopropyl alcohol, benzoyl peroxide, epoxy resin and water-soluble lubricant, and freezing to obtain a lyophilized product, wherein the freezing temperature during the freezing treatment is -20°C;

[0052] S4. The freeze-dried material is ground into powder after vacuum treatment and mixed with the crystallized powder, and then the anti-scaling material is obtained by dry granulation and sealed for storage. It is worth noting that the vacuum degree during vacuum treatment is 60Pa, and the gap between the rollers during dry granulation is 0.15 mm.

[0053] Embodiment 3:

[0054] S1, 50 parts by weight of isopropanol, 3 parts by weight of benzoyl peroxide, 10 parts by weight of activated carbon, 16 parts by weight of oxalic acid, 15 parts by weight of ammonia water, 5 parts by weight of calcium oxide, 8 parts by weight of water-soluble lubricant, 3 parts by weight of filler, and 15 parts by weight of epoxy resin, after mixing the oxalic acid with water at room temperature to form a solution, then adding ammonia water to the solution through a mechanical mixing and dosing mixer, stirring it thoroughly and then letting it stand, the stirring speed of the mechanical mixing and dosing mixer is 65rpm, wherein the water-soluble lubricant is 1,2-propylene glycol, the filler includes diatomaceous earth and bentonite, and the mass ratio of diatomaceous earth and bentonite is 1:1, and the activated carbon is a synthetic material activated carbon with a pore diameter greater than 2 nanometers and less than 50 nanometers;

[0055] S2, removing the residue from the solution through a filter element, cooling and crystallizing to obtain crystals, and mixing and grinding the crystals with activated carbon, calcium oxide, and a filler to obtain crystalline powder, wherein the filtration accuracy when filtering out solid impurities in the solution through the filter element is 40 microns;

[0056] S3, fully mixing isopropyl alcohol, benzoyl peroxide, epoxy resin and water-soluble lubricant, and freezing to obtain a lyophilized product, wherein the freezing temperature during the freezing treatment is -30°C;

[0057] S4. The freeze-dried material is ground into powder after vacuum treatment and mixed with crystallized powder, and then the anti-scaling material is obtained by dry granulation and sealed for storage. It is worth noting that the vacuum degree during vacuum treatment is 80Pa, and the gap between the rollers during dry granulation is 0.05 mm.

[0058] The scale-removal test was carried out on the scale-inhibiting materials prepared in Examples 1-3. During the test, a pipeline was selected and hot water was passed through it. Calcium and magnesium ions reacted with carbonate ions to generate calcium carbonate and magnesium carbonate that are insoluble in water. These insoluble substances accumulated on the inner wall of the pipeline to form scale, simulating the use environment of the hot water supply system. When the scale on the inner wall of the pipeline accumulated to a certain volume and the accumulated scale had a certain thickness, the scale-inhibiting materials prepared in Examples 1-3 were placed in the pipeline for scale removal treatment. After one day of treatment, the scale conditions on the inner wall of the pipeline were recorded to calculate the scale removal efficiency of the scale-inhibiting material (scale-inhibiting efficiency = (scale volume before treatment - scale volume after treatment) / scale volume before treatment × 100%). The results are recorded in Table 1.

[0059] Table 1: Descaling efficiency of the antiscaling materials of Examples 1-3

[0060] Example 1 Example 2 Example 3 Descaling efficiency / % 91.2 93.3 92.6

[0061] It can be seen from Table 1 that the scale removal rates of the scale-inhibiting materials prepared in Examples 1-3 are not less than 91.2%, which indicates that the scale-inhibiting materials prepared in Examples 1-3 have good scale removal performance.

[0062] In the present invention, firstly, oxalic acid and ammonia water are reacted to generate ammonium oxalate which can effectively degrade organic matter and heavy metal ions in water, and then ammonium oxalate is mixed with activated carbon and calcium oxide which have good adsorption properties and can absorb organic matter and heavy metal ions in water to form crystalline powder. Secondly, isopropyl alcohol, benzoyl peroxide and other components with certain solubility that can dissolve part of organic pollutants in water are freeze-dried to obtain another component, which is then ground into powder and mixed with the crystalline powder to prepare the scale inhibition material through granulation.

[0063] After the scale-inhibiting material is put into the pipeline, the isopropyl alcohol, benzoyl peroxide and other ingredients in the material will dissolve the scale attached to the inner wall of the pipeline, and then the ammonium oxalate, activated carbon and other ingredients will adsorb it. It is worth noting that ammonium oxalate will undergo hydrolysis reaction in water to generate oxalic acid and ammonia. Under the high temperature environment in the pipeline, part of the isopropyl alcohol will react with the oxygen in the air in the pipeline to oxidize to generate hydrogen peroxide, which will then react with oxalic acid, ammonium oxalate and ammonia to generate gas. These gases are released in the form of micro-nano bubbles (micro-nano bubbles refer to tiny bubbles with a diameter of micrometers or nanometers). Micro-nano bubbles can penetrate into the tiny gaps inside the pipeline. When the micro-nano bubbles burst, they will generate a strong impact force to flush the scale inside the pipeline and improve the descaling efficiency. In addition, the large specific surface area, long residence time and high interfacial activity of the micro-nano bubbles can improve the scale-inhibiting performance of the material.

[0064] Embodiment 4:

[0065] In the present invention, oxalic acid is mixed with water to form a solution, which then reacts with ammonia water to form ammonium oxalate. Then, when the material is put into the pipeline, the ammonium oxalate undergoes a hydrolysis reaction to form oxalic acid and ammonia. The specific process is as follows:

[0066]

[0067]

[0068] In the formula, For oxalic acid, Ammonia water, is ammonium oxalate, For water, is the oxalate ion, is the ammonium ion, It is a hydroxide ion. When the material is prepared, oxalic acid will react with ammonia water to generate ammonium oxalate, which has the effect of degrading organic matter and heavy metal ions in water. When the material is put into the pipeline, the ammonium oxalate hydrolyzes to generate oxalate ions, ammonium ions and hydroxide ions. Among them, oxalate ions are weak acid ions and can combine with hydrogen ions in water to generate oxalic acid. Oxalic acid also has a significant descaling effect. The principle is to react chemically with calcium and magnesium ions in scale to decompose and remove them, and ammonium ions combine with hydroxide ions to generate ammonia and water.

[0069] In order to verify that oxalic acid and ammonia water are one of the important components of the scale inhibition material provided by the present invention with good descaling effect, this embodiment is based on the above embodiment 2, only one or all of oxalic acid and ammonia water are missing, and embodiment 2 is set as a control group to prepare a scale inhibition material. The scale removal efficiency test method provided in the above embodiment is used for testing. The test results are as follows Figure 2 shown.

[0070] according to Figure 2 It can be seen that compared with the control group, when the material lacks one or more of oxalic acid or ammonia water, the scale removal efficiency of the scale inhibition material is significantly reduced. Therefore, it can be shown that oxalic acid and ammonia water are one of the important components of the scale inhibition material provided by the present invention with good scale removal effect.

[0071] Embodiment 5:

[0072] When the scale-inhibiting material provided by the present invention is put into a pipeline, the isopropyl alcohol, benzoyl peroxide and other components in the material dissolve the scale attached to the inner wall of the pipeline and then are adsorbed by ammonium oxalate, activated carbon and other components. Among them, benzoyl peroxide can be used as a catalyst to catalyze isopropyl alcohol to generate hydrogen peroxide under the high temperature environment in the pipeline, and then the hydrogen peroxide is used to react with oxalic acid, ammonium oxalate and ammonia to generate micro-nano bubbles, and then the micro-nano bubbles are used to treat the scale to improve the descaling efficiency. The process of hydrogen peroxide reaction to generate gas is as follows:

[0073]

[0074]

[0075] In the formula, For hydrogen peroxide, is carbon dioxide gas, Ammonia, The carbon dioxide gas and nitrogen generated by the reaction of hydrogen peroxide with oxalic acid, ammonium oxalate and ammonia are released in the form of micro-nano bubbles, which can penetrate into the tiny gaps inside the pipe, flush the scale inside the pipe and improve the descaling efficiency.

[0076] In order to verify that isopropyl alcohol and benzoyl peroxide are one of the important components of the scale inhibition material provided by the present invention with good descaling effect, this embodiment is based on the above embodiment 2, only lacks one or all of isopropyl alcohol and benzoyl peroxide, and sets embodiment 2 as a control group to prepare a scale inhibition material. The scale removal efficiency test method provided in the above embodiment is used for testing. The test results are as follows: Figure 3 shown.

[0077] according to Figure 3 It can be seen that compared with the control group, when the material lacks one or more of isopropyl alcohol and benzoyl peroxide, the scale removal efficiency of the scale inhibitor material is significantly reduced. Therefore, it can be explained that oxalic acid and ammonia water are one of the important components of the scale inhibitor material provided by the present invention with good scale removal effect.

[0078] Embodiment 6:

[0079] The descaling material is prepared according to the method provided in the above embodiment, and then tested according to the descaling efficiency test method provided in the above embodiment;

[0080] The test shows that, under the working conditions of this embodiment, after the scale-inhibiting material is used in the pipeline for treatment, the scale in the pipeline is significantly reduced, indicating that the scale-inhibiting material provided by the present invention has a good descaling effect.

[0081] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for preparing a high temperature resistant and environmentally friendly micro-nano scale inhibition material, characterized in that: The following steps are involved: S1, weighing 30-50 parts by weight of isopropyl alcohol, 3-9 parts by weight of benzoyl peroxide, 5-10 parts by weight of activated carbon, 16-26 parts by weight of oxalic acid, 8-15 parts by weight of ammonia water, 5-10 parts by weight of calcium oxide, 4-8 parts by weight of a water-soluble lubricant, 3-8 parts by weight of a filler, and 7-15 parts by weight of an epoxy resin, stirring oxalic acid with water at room temperature to form a solution, then adding ammonia water to the solution, stirring it thoroughly, and then letting it stand; S2, removing the slag from the solution and then cooling and crystallizing to obtain crystals, and mixing and grinding the crystals with activated carbon, calcium oxide, and a filler to obtain crystalline powder; S3, fully mixing isopropyl alcohol, benzoyl peroxide, epoxy resin and water-soluble lubricant, and freezing to obtain a lyophilized product; S4. The freeze-dried product is ground into powder after vacuum treatment, mixed with crystallized powder, and then granulated by dry method to obtain the anti-scaling material, which is sealed and stored.

2. The method for preparing the high temperature resistant and environmentally friendly micro-nano scale inhibition material according to claim 1, characterized in that: In S1, the water-soluble lubricant is 1,2-propylene glycol.

3. The method for preparing the high temperature resistant and environmentally friendly micro-nano scale inhibition material according to claim 1, characterized in that: In S1, the filler includes diatomaceous earth and bentonite, and the mass ratio of diatomaceous earth to bentonite is 1:

1.

4. The method for preparing the high temperature resistant and environmentally friendly micro-nano scale inhibition material according to claim 1, characterized in that: In S1, the activated carbon is a synthetic activated carbon with a pore diameter greater than 2 nanometers and less than 50 nanometers.

5. The method for preparing the high temperature resistant and environmentally friendly micro-nano scale inhibition material according to claim 1, characterized in that: In S1, aqueous ammonia is added to the solution through a mechanical mixing and dosing stirrer, and the stirring speed range of the mechanical mixing and dosing stirrer is 65-135 rpm.

6. The method for preparing the high temperature resistant and environmentally friendly micro-nano scale inhibition material according to claim 1, characterized in that: In S2, solid impurities in the solution are filtered out by a filter element, and the filtering accuracy range is 10-40 microns.

7. The method for preparing the high temperature resistant and environmentally friendly micro-nano scale inhibition material according to claim 1, characterized in that: In the above S3, the freezing temperature range during the freezing treatment is -30 to 15°C.

8. The method for preparing the high temperature resistant and environmentally friendly micro-nano scale inhibition material according to claim 1, characterized in that: In the above S4, the vacuum degree during vacuum treatment ranges from 40 to 80 Pa.

9. The method for preparing the high temperature resistant and environmentally friendly micro-nano scale inhibition material according to claim 1, characterized in that: In S4, the gap between the rollers during dry granulation is in the range of 0.05-0.25 mm.

10. The high temperature resistant and environmentally friendly micro-nano scale inhibition material prepared by the preparation method according to any one of claims 1 to 9.

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