Preparation method and application of barium strontium sulfate descaling agent

Abstract

The present invention relates to a preparation method of a barium strontium sulfate descaling agent, comprising the following steps: adding a prepared additive solution to a prepared chelating agent alkaline solution, fully mixing and dissolving the solution, and adjusting the pH to alkaline, thereby obtaining the barium strontium sulfate descaling agent. The present invention has the following beneficial effects: the preparation method of the present invention can significantly improve the descaling effect of the descaling agent on barium strontium sulfate scale, increase the contact area with metal ions, thereby improving the overall descaling effect, effectively destroying the formation of barium strontium sulfate scale, and the descaling agent still maintains a stable descaling effect under high temperature conditions, and has broad industrial application prospects. The chelating agent used not only has good metal ion chelating effect, can effectively complex barium, strontium ions, and destroy the formation of barium sulfate and strontium sulfate crystals, but also has the characteristics of being stable under high temperature and high pH value, being suitable for complex industrial conditions, and performing well in neutral and alkaline water, and is also more environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial water treatment, and in particular to a preparation method and application of a barium strontium sulfate descaling agent. Background Art

[0002] The formation and deposition of barium strontium sulfate scale is a common and difficult-to-solve problem in industrial water treatment. This is particularly true in high-temperature, high-pressure, or highly salinized environments, such as oil and gas extraction, power generation, chemical manufacturing, and desalination. Barium strontium sulfate scale can clog pipes and equipment, significantly reducing heat transfer efficiency and system stability, and can even cause equipment failure.

[0003] Currently, there are few descaling agents available on the market for barium strontium sulfate scale, and their effectiveness varies widely. While many products effectively dissolve barium strontium sulfate scale, they often corrode equipment or lack chemical stability, resulting in short-term descaling. Some descaling agents also lack environmental friendliness and can easily cause secondary pollution. Furthermore, traditional descaling methods, such as mechanical cleaning and pickling, are complex, corrode equipment, and incur high processing costs, making them difficult to meet modern industry's demand for efficient, safe, and economical cleaning technologies.

[0004] Therefore, in order to solve one of the above problems, a barium strontium sulfate descaling agent is needed, which can quickly and efficiently dissolve barium strontium sulfate scale and has equipment compatibility, environmental protection and economy. Summary of the Invention

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is: to provide a preparation method and application of a barium strontium sulfate descaling agent, to prepare an efficient, safe and environmentally friendly barium strontium sulfate descaling agent, to solve the problems of poor descaling effect of existing descaling agents and complicated operation of descaling methods, and to effectively destroy the formation of barium strontium sulfate scale, improve descaling efficiency, reduce the maintenance cost of industrial equipment, and thus meet the needs of modern industry for efficient, safe and economical cleaning technology.

[0006] The invention discloses a method for preparing a barium strontium sulfate descaling agent. By introducing compounds such as graphene oxide, a chelating agent and additives, a novel barium strontium sulfate descaling agent is prepared, which effectively solves the problem of barium strontium sulfate scale deposition.

[0007] The preparation method of a barium strontium sulfate descaling agent disclosed by the present invention comprises the following steps: adding a prepared additive solution to a prepared chelating agent alkaline solution, fully mixing and dissolving the mixture, and adjusting the pH to alkaline, thereby obtaining the barium strontium sulfate descaling agent, wherein the additive solution is one of GT (a composite solution of graphene oxide and triethylenetetramine), TETA (triethylenetetramine), GD (a composite solution of graphene oxide and diethylenetriamine), DETA (diethylenetriamine), GC (a composite solution of graphene oxide and citric acid), a citric acid solution, GTA (a composite solution of graphene oxide and tartaric acid), and a tartaric acid solution.

[0008] Preferably, the mass fraction of the chelating agent in the chelating agent solution is 5% to 15%, and the mass fraction of the additive in the additive solution is 1% to 5%.

[0009] Preferably, the preparation steps of the chelating agent alkaline solution are:

[0010] (1) Weigh the required chelating agent in proportion into a beaker or volumetric flask, add an appropriate amount of deionized water, and place the beaker or volumetric flask containing the solution on a magnetic stirrer for stirring;

[0011] (2) Adjust the pH to 8 by adding an appropriate amount of pH regulator and continue stirring for 30 to 60 minutes until the chelating agent is completely dissolved.

[0012] Preferably, the chelating agent is one of DTPA-BMA (5,8-biscarboxymethyl-11-[2-(methylamino)-2-oxoethyl]-3-oxo-2,5,8,11-tetraazatridecyl-13-carboxylic acid), EDDHMA (N,N'-bis(2-hydroxy-5-methylphenyl)ethylenediamine-N,N'-diacetic acid), DTPA (pentasodium ethylenediaminetetraacetic acid), and HEDP (hydroxyethylidene diphosphonic acid).

[0013] Preferably, the additive solution is a composite solution of graphene oxide and triethylenetetramine, and its preparation steps are: GO (graphene oxide) and TETA (triethylenetetramine) are uniformly mixed in a 1:1 ratio, the required mixture is weighed in proportion, an appropriate amount of deionized water is added, and the mixture is stirred on a magnetic stirrer for 30 to 45 minutes until it is completely dissolved.

[0014] Preferably, the additive solution is a composite solution of graphene oxide and diethylenetriamine, and its preparation steps are: GO (graphene oxide) and DETA (diethylenetriamine) are uniformly mixed in a 1:1 ratio, the required mixture is weighed in proportion, an appropriate amount of deionized water is added, and the mixture is stirred on a magnetic stirrer for 30 to 45 minutes until it is completely dissolved.

[0015] Preferably, the additive solution is a composite solution of graphene oxide and citric acid, and its preparation steps are: GO (graphene oxide) and citric acid are uniformly mixed in a 1:1 ratio, the required mixture is weighed in proportion, an appropriate amount of deionized water is added, and the mixture is stirred on a magnetic stirrer for 30 to 45 minutes until it is completely dissolved.

[0016] Preferably, the chelating agent alkaline solution is mixed with the additive solution, placed in a magnetic stirrer and fully dissolved for 30 to 60 minutes, and a pH regulator is added to adjust the pH to 12, thereby finally obtaining the barium strontium sulfate descaling agent.

[0017] Preferably, the pH regulator used in the preparation of the chelating agent alkaline solution and the preparation of the barium strontium sulfate descaling agent is one of NaOH, KOH, Na2CO3, and NH3·H20.

[0018] The application of the barium strontium sulfate descaling agent obtained by the preparation method of the barium strontium sulfate descaling agent of the present invention is specifically as follows: first, a pre-weighed barium strontium sulfate scale sample and water are added to an experimental container; then, a prepared descaling agent solution is added to the experimental container, wherein the mass fraction of the descaling agent in the descaling agent solution is 5% to 15%; then, the experimental container is placed in a constant temperature water bath set at 80°C, and a descaling experiment is performed, and the scale sample is weighed and recorded at intervals of 5 hours, 8 hours, and 16 hours respectively. After the barium strontium sulfate scale is completely dissolved, the final reaction time is recorded. After the reaction is completed, the barium strontium sulfate scale sample is filtered and weighed, and the descaling rate is calculated.

[0019] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0020] (1) The preparation method of the present invention can significantly improve the descaling effect of the descaling agent on barium strontium sulfate scale. The combination of the chelating agent and the additive increases the contact area with the metal ions, thereby improving the overall descaling effect and effectively destroying the formation of barium strontium sulfate scale. In addition, the descaling agent can still maintain a stable descaling effect under high temperature conditions, and has broad industrial application prospects.

[0021] (2) The chelating agent used in the preparation method of the present invention not only has good metal ion chelation effect, can effectively complex barium, strontium ions, and destroy the formation of barium sulfate and strontium sulfate crystals, but also has the characteristics of being stable at high temperature and high pH value, suitable for complex industrial conditions, and performing well in neutral and alkaline water, and is more environmentally friendly;

[0022] (3) The preparation method of the present invention uses GO (graphene oxide) as a carrier. The surface of graphene oxide contains rich functional groups such as carboxyl, hydroxyl and epoxy groups, and has excellent hydrophilicity and dispersibility. It can not only enhance the adsorption and complexation of chelating agents and additives on metal ions, but also improve the dissolution and descaling ability of barium sulfate and strontium sulfate crystals; in addition, graphene oxide, as an environmentally friendly material, can not only effectively adsorb metal ions (such as barium, strontium, etc.), but also complex with metal ions through surface functional groups, and reduce the negative impact on the environment during chemical treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0024] (1) Figure 1 These are SEM photographs of two barium strontium sulfate scale samples used in the experiments of Example 2-13 before and after the reaction; (a) and (b) are photos of flaky barium strontium sulfate scale before and 8 hours after the experiment, and (c) and (d) are photos of massive barium strontium sulfate scale before and 8 hours after the experiment;

[0025] (2) Figure 2 These are EDS photos of two barium strontium sulfate scale samples used in the experiment of Example 2-13 before and after the reaction, where a is flaky barium strontium sulfate scale and b is massive barium strontium sulfate scale;

[0026] (3) Figure 3 The dissolution curves of two types of barium strontium sulfate scale samples obtained in the experiment of Example 2-13 within 8 hours are shown, where a is flaky barium strontium sulfate scale and b is massive barium strontium sulfate scale;

[0027] (4) Figure 4 This is a curve showing the dissolution efficiency of the descaling agent obtained in the experiment of Example 2-13 in a blocky barium strontium sulfate scale sample; DETAILED DESCRIPTION

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

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Example 1: A method for preparing a chelating agent alkaline solution, taking the preparation of a DTPA-BMA alkaline solution as an example, comprises the following steps:

[0031] (1) Weigh 5% DTPA-BMA into a beaker or volumetric flask, add an appropriate amount of deionized water, and place the beaker or volumetric flask containing the solution on a magnetic stirrer for stirring;

[0032] (2) Adjust the pH to 8 by adding an appropriate amount of 5 mol / L NaOH solution and continue the reaction for 30 to 60 minutes until the DTPA-BMA is completely dissolved.

[0033] Example 2: A method for preparing a barium strontium sulfate descaling agent, taking the preparation of a TETA solution as an example, comprises the following steps:

[0034] (1) GO powder and TETA were uniformly mixed in a ratio of 1:1 and named GT. GT with a mass fraction of 3% and deionized water were added to a reaction bottle and placed on a magnetic stirrer for 30 to 45 minutes until it was completely dissolved.

[0035] (2) The prepared GT solution was added to the DTPA-BMA alkaline solution in Example 1 at a ratio of 1:1, and the mixture was stirred on a magnetic stirrer for 30 to 60 minutes. A 5 mol / L NaOH solution was added dropwise to adjust the pH to 12, and finally a barium strontium sulfate descaling agent was obtained. For easy identification, the descaling agent obtained in Example 2 was named DTPA-BMA-GT. Figure 3 、 Figure 4 The curve described in DTPA-BMA-GT.

[0036] Example 3: A method for preparing a barium strontium sulfate descaling agent, which differs from Example 2 in that the additive is TETA without GO, and specifically comprises the following steps:

[0037] (1) Add 3% TETA and deionized water into a reaction flask and place it on a magnetic stirrer and stir continuously for 30 to 45 minutes until it is completely dissolved.

[0038] (2) The prepared TETA solution was added to the DTPA-BMA alkaline solution in Example 1 at a ratio of 1:1, and the mixture was stirred on a magnetic stirrer for 30 to 60 minutes. A 5 mol / L NaOH solution was added dropwise to adjust the pH to 12, and finally a barium strontium sulfate descaling agent was obtained. For easy identification, the descaling agent obtained in Example 3 was named DTPA-BMA-TETA. Figure 3 、 Figure 4 The curve described in DTPA-BMA-TETA.

[0039] Example 4: A method for preparing a barium strontium sulfate descaling agent, which differs from Example 2 in that the additives are different, specifically comprising the following steps:

[0040] (1) GO powder and DETA were uniformly mixed in a ratio of 1:1 and named GD. GD with a mass fraction of 3% and deionized water were added to a reaction bottle and placed on a magnetic stirrer for 30 min to 45 min until it was completely dissolved.

[0041] (2) Add the prepared GD solution to the DTPA-BMA alkaline solution in Example 1, place it on a magnetic stirrer and continue stirring for 30 to 60 minutes, add 5 mol / L NaOH solution dropwise to adjust the pH to 12, and finally obtain a barium strontium sulfate descaling agent. For easy distinction, the descaling agent obtained in Example 4 is named DTPA-BMA-GD. Figure 3 、 Figure 4 The curve described in DTPA-BMA-GD.

[0042] Example 5: A method for preparing a barium strontium sulfate descaling agent, which differs from Example 4 in that the additive is DETA without GO, and specifically comprises the following steps:

[0043] (1) Add 3% DETA and deionized water into a reaction flask and place it on a magnetic stirrer and stir continuously for 30 to 45 minutes until it is completely dissolved.

[0044] (2) Add the prepared DETA solution to the DTPA-BMA alkaline solution in Example 1, place it on a magnetic stirrer and continue stirring for 30 to 60 minutes, add 5 mol / L NaOH solution dropwise to adjust the pH to 12, and finally obtain a barium strontium sulfate descaling agent. For easy distinction, the descaling agent obtained in Example 5 is named DTPA-BMA-DETA. Figure 3 、 Figure 4 The curve described in DTPA-BMA-DETA.

[0045] Example 6: A method for preparing a barium strontium sulfate descaling agent, which differs from Example 4 in that GC is selected as the additive, specifically comprising the following steps:

[0046] (1) GO powder and citric acid were uniformly mixed in a ratio of 1:1 and named GC. 3% GC and deionized water were added to a reaction bottle and placed on a magnetic stirrer for 30 to 45 minutes until it was completely dissolved.

[0047] (2) The prepared GC solution was added to the DTPA-BMA alkaline solution in Example 1 at a ratio of 1:1, and the mixture was stirred on a magnetic stirrer for 30 to 60 minutes. A 5 mol / L NaOH solution was added dropwise to adjust the pH to 12, and finally a barium strontium sulfate descaling agent was obtained. For easy identification, the descaling agent obtained in Example 6 was named DTPA-BMA-GC. Figure 3 、 Figure 4 The curve described in DTPA-BMA-GC.

[0048] Example 7: A method for preparing a barium strontium sulfate descaling agent, which differs from Example 6 in that the additive is citric acid without GO, and specifically comprises the following steps:

[0049] (1) Add 3% citric acid and deionized water into a reaction flask and place it on a magnetic stirrer and stir continuously for 30 to 45 minutes until it is completely dissolved.

[0050] (2) The prepared citric acid solution was added to the DTPA-BMA alkaline solution in Example 1 at a ratio of 1:1, and the mixture was stirred on a magnetic stirrer for 30 to 60 minutes. A 5 mol / L NaOH solution was added dropwise to adjust the pH to 12, and finally a barium strontium sulfate descaling agent was obtained. For easy identification, the descaling agent obtained in Example 7 was named DTPA-BMA-citric acid. Figure 3 、 Figure 4 The curve described in DTPA-BMA-citrate.

[0051] Example 8: A method for preparing a barium strontium sulfate descaling agent, which differs from Example 6 in that GTA is used as the additive, and specifically comprises the following steps:

[0052] (1) GO powder and tartaric acid were uniformly mixed in a ratio of 1:1, named GTA. GTA with a mass fraction of 3% and deionized water were added to a reaction bottle and placed on a magnetic stirrer for 30 min to 45 min until it was completely dissolved.

[0053] (2) Add the prepared GTA solution to the DTPA-BMA alkaline solution in Example 1, place it on a magnetic stirrer and continue stirring for 30 to 60 minutes, add 5 mol / L NaOH solution dropwise to adjust the pH to 12, and finally obtain a barium strontium sulfate descaling agent. For easy distinction, the descaling agent obtained in Example 6 is named DTPA-BMA-GTA. Figure 3 、 Figure 4 The curve described in DTPA-BMA-GTA.

[0054] Example 9: A method for preparing a barium strontium sulfate descaling agent, which differs from Example 8 in that tartaric acid without GO is added, specifically comprising the following steps:

[0055] (1) Add 3% tartaric acid and deionized water into a reaction flask and place it on a magnetic stirrer and stir continuously for 30 to 45 minutes until it is completely dissolved.

[0056] (2) The prepared tartaric acid solution was added to the DTPA-BMA alkaline solution in Example 1 at a ratio of 1:1, and the mixture was stirred on a magnetic stirrer for 30 to 60 minutes. A 5 mol / L NaOH solution was added dropwise to adjust the pH to 12, and finally a barium strontium sulfate descaling agent was obtained. For easy identification, the descaling agent obtained in Example 9 was named DTPA-BMA-tartaric acid. Figure 3 、 Figure 4 The curve described in DTPA-BMA-tartaric acid.

[0057] Example 10: A method for preparing a barium strontium sulfate descaling agent, which differs from Example 2 in that no additives are used, and specifically comprises the following steps:

[0058] The prepared DTPA-BMA alkaline solution was placed on a magnetic stirrer and stirred for 30 to 60 minutes, and a 5 mol / L NaOH solution was added dropwise to adjust the pH to 12 to obtain a barium strontium sulfate descaling agent. For easy identification, the descaling agent in Example 10 was named DTPA-BMA. Figure 3 、 Figure 4 The curve described in DTPA-BMA.

[0059] Example 11: A method for preparing a barium strontium sulfate descaling agent, which differs from Example 10 in that EDDHMA is used as a chelating agent, and specifically comprises the following steps:

[0060] (1) Weigh 5% EDDHMA into a reaction flask, add an appropriate amount of deionized water, and stir on a magnetic stirrer. Insert a pH meter into the reaction flask and use a dropper to add 5 mol / L NaOH solution to the reaction flask to adjust the pH to 8. Stir continuously for 30 to 60 minutes until the chelating agent EDDHMA is completely dissolved to obtain an EDDHMA alkaline solution.

[0061] (2) The prepared EDDHMA alkaline solution was placed on a magnetic stirrer and stirred continuously for 30 to 60 minutes, and a 5 mol / L NaOH solution was added dropwise to adjust the pH to 12, and finally a barium strontium sulfate descaling agent was obtained. For the sake of distinction, the descaling agent in Example 11 is named EDDHMA. Figure 3 、 Figure 4The curve described in EDDHMA.

[0062] Example 12: A method for preparing a barium strontium sulfate descaling agent, which differs from Example 10 in that HEDP is used as a chelating agent, and specifically comprises the following steps:

[0063] (1) Weigh 5% HEDP into a reaction flask, add an appropriate amount of deionized water, and stir on a magnetic stirrer. Insert a pH meter into the reaction flask and use a dropper to add 5 mol / L NaOH solution to the reaction flask to adjust the pH to 8. Stir continuously for 30 to 60 minutes until the chelating agent HEDP is completely dissolved to obtain a HEDP alkaline solution.

[0064] (2) The prepared HEDP alkaline solution was placed on a magnetic stirrer and stirred continuously for 30 to 60 minutes, and a 5 mol / L NaOH solution was added dropwise to adjust the pH to 12, and finally a barium strontium sulfate descaling agent was obtained. For the sake of easy distinction, the descaling agent in Example 12 is named HEDP. Figure 3 、 Figure 4 The curve described in HEDP.

[0065] Example 13: A method for preparing a barium strontium sulfate descaling agent, which differs from Example 10 in that DTPA is used as a chelating agent, and specifically comprises the following steps:

[0066] (1) Weigh 5% DTPA into a reaction flask, add an appropriate amount of deionized water, and stir on a magnetic stirrer. Insert a pH meter into the reaction flask and use a dropper to add 5 mol / L NaOH solution to the reaction flask to adjust the pH to 8. Stir continuously for 30 to 60 minutes until the chelating agent DTPA is completely dissolved to obtain a DTPA alkaline solution.

[0067] (2) The prepared DTPA alkaline solution was placed on a magnetic stirrer and stirred continuously for 30 to 60 minutes, and a 5 mol / L NaOH solution was added dropwise to adjust the pH to 12, and finally a barium strontium sulfate descaling agent was obtained. For the sake of distinction, the descaling agent in Example 12 is named DTPA. Figure 3 、 Figure 4 The curve described in DTPA.

[0068] Performance testing:

[0069] The barium strontium sulfate descaling agent obtained in Examples 2-13 was applied to a descaling experiment, and its descaling performance was tested using two barium strontium sulfate scale samples with different morphologies. Specifically, a pre-weighed barium strontium sulfate scale sample was added to the experimental container; then, a prepared descaling agent solution was added to the experimental container, with the mass fraction of the descaling agent in the descaling agent solution being 15%; then, the experimental container was placed in a constant temperature water bath set at 80°C, and the descaling experiment was conducted. The scale sample was weighed and recorded at intervals of 5 hours, 8 hours, and 16 hours. After the barium strontium sulfate scale was completely dissolved, the final reaction time was recorded. After the reaction was completed, the barium strontium sulfate scale sample was filtered and weighed, and its descaling rate was calculated.

[0070] The characterization results of the scale samples are shown in Figure 1 and Figure 2 , the descaling agent performance test results are shown in Figure 3-Figure 4 shown.

[0071] In summary: from Figure 1-Figure 2 It can be seen from the figure that before and after the reaction, the volume of both flaky and lump-shaped scale samples is greatly reduced and dispersed more evenly.

[0072] from Figure 3 It can be seen that among the two barium strontium sulfate scale samples, the barium strontium sulfate descaling agents configured with GT, GC, GTA and GD have a much higher mass of scale dissolved within 8 hours than the other prepared descaling agents. The descaling effect of the descaling agent prepared by using chelating agents and additives is much higher than that of the descaling agent without using additives. This effect is more obvious in the second descaling agent.

[0073] from Figure 4 It can be seen that the barium strontium sulfate descaling agents configured with GT, GD, GC and GTA are 0.3598g, 0.3683g, 0.3683g, 0.3700g and 0.3650g respectively. When comparing the barium strontium sulfate descaling agents configured with GT, GD, GC and GTA, when dissolving scale samples of similar mass, the descaling agent with GT added takes the least time, and the time required to completely dissolve the scale sample is 27.8h. The scale dissolving efficiency is much higher than the descaling agent with GTA additive, which takes 77.6h. Compared with other additives, GT shows more efficient and faster descaling performance.

[0074] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

[0075] Any matters not described in detail in the present invention are well-known technologies to those skilled in the art.

Claims

1. A method for preparing a barium strontium sulfate descaling agent, characterized in that: The prepared additive solution is added to the prepared chelating agent alkaline solution, fully mixed and dissolved, and the pH is adjusted to alkaline to obtain a barium strontium sulfate descaling agent, wherein the additive solution is one of a composite solution of graphene oxide and triethylenetetramine, a composite solution of graphene oxide and diethylenetriamine, and a composite solution of graphene oxide and citric acid; When the additive solution is a composite solution of graphene oxide and triethylenetetramine, its preparation steps are as follows: graphene oxide and triethylenetetramine are uniformly mixed in a 1:1 ratio, the desired mixture is weighed in proportion, an appropriate amount of deionized water is added, and the mixture is stirred on a magnetic stirrer for 30 to 45 minutes until it is completely dissolved; when the additive solution is a composite solution of graphene oxide and diethylenetriamine, its preparation steps are as follows: graphene oxide and diethylenetriamine are uniformly mixed in a 1:1 ratio, the desired mixture is weighed in proportion, an appropriate amount of deionized water is added, and the mixture is stirred on a magnetic stirrer for 30 to 45 minutes until it is completely dissolved; when the additive solution is a composite solution of graphene oxide and citric acid, its preparation steps are as follows: graphene oxide and citric acid are uniformly mixed in a 1:1 ratio, the desired mixture is weighed in proportion, an appropriate amount of deionized water is added, and the mixture is stirred on a magnetic stirrer for 30 to 45 minutes until it is completely dissolved; The mass fraction of the chelating agent in the chelating agent alkaline solution is 5% to 15%, and the mass fraction of the additive in the additive solution is 1% to 5%; The chelating agent is one of 5,8-biscarboxymethyl-11-[2-(methylamino)-2-oxoethyl]-3-oxo-2,5,8,11-tetraazatridecyl-13-carboxylic acid, N,N'-bis(2-hydroxy-5-methylphenyl)ethylenediamine-N,N'-diacetic acid, pentasodium ethylenediaminetetraacetic acid, and hydroxyethylidene diphosphonic acid.

2. The method for preparing a barium strontium sulfate descaling agent according to claim 1, wherein: The preparation steps of the chelating agent alkaline solution are: (1) Weigh the required chelating agent into a beaker or volumetric flask according to the proportion, add an appropriate amount of deionized water, and place the beaker or volumetric flask containing the solution on a magnetic stirrer for stirring; (2) Adjust the pH to 8 by adding an appropriate amount of pH regulator and continue stirring for 30 to 60 minutes until the chelating agent is completely dissolved.

3. The method for preparing a barium strontium sulfate descaling agent according to claim 1, wherein: The chelating agent alkaline solution and the additive solution are mixed, placed in a magnetic stirrer and fully dissolved for 30 to 60 minutes, and a pH regulator is added to adjust the pH to 12, thereby finally obtaining a barium strontium sulfate descaling agent.

4. The method for preparing a barium strontium sulfate descaling agent according to claim 2 or 3, wherein: The pH adjuster is one of NaOH, KOH, Na2CO3, and NH3·H2O.

5. An application of the barium strontium sulfate descaling agent obtained by the preparation method of the barium strontium sulfate descaling agent according to claim 4, characterized in that: First, a pre-weighed barium strontium sulfate scale sample and water were added to the experimental container; then, a prepared descaling agent solution was added to the experimental container, wherein the mass fraction of the descaling agent in the descaling agent solution was 5% to 15%; then, the experimental container was placed in a constant temperature water bath with the temperature set at 80°C, and a descaling experiment was performed. The scale sample was weighed and recorded at intervals of 5h, 8h, and 16h. After the barium strontium sulfate scale was completely dissolved, the final reaction time was recorded. After the reaction was completed, the barium strontium sulfate scale sample was filtered and weighed, and its descaling rate was calculated.

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