Deoxidant composition for deoxidizing normal-pressure boiler feed water and preparation method of deoxidant composition

Abstract

The invention discloses a deoxidant composition for deoxidizing normal-pressure boiler feed water and a preparation method of the deoxidant composition, and relates to the field of chemical deoxidants. The deoxidant composition provided by the invention comprises the following components in parts by mass: 300-500 parts of a deoxidant main agent, 100-300 parts of a deoxidant auxiliary agent, 50-200 parts of a pH regulator, 10-100 parts of a dispersant and the balance of deionized water, the deoxidant main agent is sodium sulfite, and the deoxidant auxiliary agent comprises benzotriazole, vitamin C and acetoxime. The deoxidant composition disclosed by the invention shows an excellent deoxidizing effect in a boiler feed water treatment process, has good corrosion inhibition performance, and can effectively keep a system clean and greatly prolong the service life of equipment.

Description

Technical Field

[0001] The present invention belongs to the field of chemical deoxidizers, and particularly relates to a deoxidizer composition for deoxygenating feed water of atmospheric pressure boilers and a preparation method thereof. Background Art

[0002] Dissolved oxygen (DO) in the boiler system can cause significant corrosion problems, seriously affecting the efficiency and lifespan of the boiler. Dissolved oxygen can react with metal components in the boiler to form oxides, thereby exacerbating the corrosion phenomenon. Research shows that for every 1 mg / L increase in the dissolved oxygen concentration in the boiler system, the corrosion rate can increase by approximately 0.2 - 0.5 mm / year, which will lead to a significant increase in equipment maintenance costs. Therefore, controlling and removing dissolved oxygen in boiler water is crucial for ensuring the stability of the system and reducing long-term operating costs.

[0003] Currently, deoxygenation technologies mainly include two major categories: physical and chemical methods. Physical methods such as gas displacement can reduce the dissolved oxygen in water to a certain extent, but are often limited by equipment complexity and energy consumption in practical applications. In contrast, chemical deoxidizers are widely used because of their simple operation and significant effects. Chemical deoxidizers directly remove dissolved oxygen through reduction reactions and usually have higher efficiency and economy.

[0004] However, traditional chemical deoxidizers have some deficiencies. First, these deoxidizers may produce by-products during use, which may not only cause secondary pollution to the system but also affect the quality of boiler water. For example, some deoxidizers produce acidic by-products after the reaction, and additional treatment steps are required to neutralize these by-products. Second, the deoxidation efficiency and stability of traditional deoxidizers may be affected by environmental conditions (such as temperature), resulting in unstable effects in practical applications. Therefore, developing new deoxidizers with higher efficiency, more stable performance, and lower maintenance requirements has become an important direction for improving the performance of boiler systems. Summary of the Invention

[0005] To solve the above problems, the purpose of the present invention is to provide a deoxidizer composition for atmospheric pressure boilers and a preparation method thereof. The deoxidizer composition has a low dosage (20 microliters per 45 milliliters), good deoxidation effect (below 15 μg), and has a corrosion inhibition effect on the boiler body while achieving deep deoxygenation of boiler feed water.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] On the one hand, the present invention provides an oxygen scavenger composition for deoxygenating the feed water of an atmospheric pressure boiler, which is composed of the following components in parts by mass: 300 to 500 parts of an oxygen scavenging main agent, 100 to 300 parts of an oxygen scavenging auxiliary agent, 50 to 200 parts of a pH regulator, 10 to 100 parts of a dispersant, and the balance of deionized water, wherein the oxygen scavenging main agent is sodium sulfite, and the oxygen scavenging auxiliary agent includes benzotriazole, vitamin C, and acetone oxime.

[0008] Further, the concentration of the sodium sulfite is 0.3% - 0.5%.

[0009] Further, the benzotriazole is used as a corrosion inhibitor, and the concentration is 0.1% - 0.3%.

[0010] Further, the vitamin C is used as a strong oxidant, and the concentration is 0.1% - 0.2%.

[0011] Further, the concentration of the acetone oxime is 0.1% - 0.2%.

[0012] Further, the pH regulator is malic acid.

[0013] Further, the concentration of the malic acid is 0.1% - 0.2%.

[0014] Further, the dispersant is polyethylene glycol.

[0015] Further, the concentration of the polyethylene glycol is 0.05% - 0.1%.

[0016] On the other hand, the present invention provides a method for preparing the oxygen scavenger composition, and the method includes the following steps:

[0017] In a reaction vessel, add an appropriate amount of deionized water and heat it to 30 - 50 °C;

[0018] Slowly add sodium sulfite with a concentration of 0.4%-0.5%, stir at a speed of 200-300 rpm for 10-20 minutes until completely dissolved; gradually add benzotriazole with a concentration of 0.2% to 0.3%, and maintain the stirring speed at 100-200 rpm, continue stirring for 15-25 minutes; add vitamin C with a concentration of 0.1% to 0.15%, and adjust the temperature of the solution to 25-35°C during this period, stir for 5-15 minutes; then add polyethylene glycol with a concentration of 0.05% to 0.1%, keep the stirring speed at 50-100 rpm, and extend the stirring time to 20-30 minutes; successively add acetone oxime with a concentration of 0.2%-0.3% and malic acid with a concentration of 0.2%-0.25%, keep the temperature of the solution at 20-30°C, stir for 10-20 minutes; finally, let the solution stand and cool to room temperature, supplement an appropriate amount of deionized water and mix well until all components are completely dissolved and evenly distributed.

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

[0020] The deoxidizer composition of the present invention can effectively remove dissolved oxygen in boiler feed water, and at the same time has good corrosion inhibition effect and dispersion performance, ensuring the long-term operation and anti-corrosion performance of the boiler system.

[0021] The deoxidizer composition provided by the present invention for deoxygenation of atmospheric pressure boiler feed water has significant beneficial effects. First, through the synergistic effect of various components such as sodium sulfite, benzotriazole, vitamin C, acetone oxime and pH regulator, the deoxidizer composition can efficiently remove dissolved oxygen and significantly improve the deoxygenation efficiency. Sodium sulfite, as the main reducing agent, can quickly react with dissolved oxygen, while auxiliaries such as benzotriazole, vitamin C and acetone oxime further accelerate this reaction process and provide additional antioxidant and corrosion inhibition protection. Secondly, pH regulators such as malic acid ensure that the deoxidizer composition operates in the optimal acid-base environment, and at the same time reduce the generation of metal oxides and precipitates through chelation, avoiding the deposition of metal salts in the pipeline and inside the boiler.

[0022] Generally speaking, the deoxidizer composition of the present invention not only improves the deoxygenation effect, but also effectively reduces the usage amount of the main deoxidizer, improves the stability and economy of the system, extends the service life of the boiler equipment, has the characteristics of high efficiency, stability and environmental protection, and is applicable to various industrial boiler systems. Brief Description of the Drawings

[0023] Figure 1 Shows the deoxygenation experimental device of the deoxidizer composition of the present invention.

[0024] Figure 2 Shows the display of the deoxygenation effect after 5 minutes and 20 minutes of stabilization in Example 1 of the present invention.

[0025] Figure 3 Show the potentiodynamic polarization curves of Q235 steel in different solutions. Detailed implementation manners

[0026] The present invention will be further described below in conjunction with specific embodiments, but the present invention is not limited thereto.

[0027] The present invention discloses an oxygen scavenger composition for deoxidizing feed water of an atmospheric pressure boiler and a preparation method thereof. The oxygen scavenger composition is composed of the following components in parts by mass: 300 to 500 parts of an oxygen scavenging main agent, 100 to 300 parts of an oxygen scavenging auxiliary agent, 50 to 200 parts of a pH regulator, 10 to 100 parts of a dispersant, and the balance deionized water. The oxygen scavenging main agent is sodium sulfite, the oxygen scavenging auxiliary agent includes benzotriazole, vitamin C and acetone oxime, the pH regulator is malic acid, and the dispersant is polyethylene glycol. The oxygen scavenger composition of the present invention exhibits excellent deoxidation effect during the process of boiler feed water treatment, and at the same time has good corrosion inhibition performance, and can effectively keep the system clean, greatly improving the service life of the equipment.

[0028] An embodiment of the present invention provides an oxygen scavenger composition for deoxidizing feed water of an atmospheric pressure boiler, which is composed of the following components in mass percentages: 0.4% of sodium sulfite (Na2SO3), 0.2% of benzotriazole (BTA), 0.1% of vitamin C (ascorbic acid, C6H8O6), 0.05% of polyethylene glycol (PEG), 0.2% of acetone oxime (C3H7NO) and 0.2% of malic acid, and the balance is deionized water.

[0029] Among them, the oxygen scavenging main agent sodium sulfite (Na2SO3) can effectively remove low-concentration dissolved oxygen. As a reducing agent, sodium sulfite can quickly consume the dissolved oxygen in water and generate harmless sulfates, thereby achieving an efficient deoxidation effect.

[0030] Benzotriazole (BTA) as a corrosion inhibitor can form a protective film on the metal surface to effectively prevent metal corrosion. BTA binds to the active sites on the metal surface to form stable coordination bonds, thereby preventing the occurrence of corrosion reactions.

[0031] Vitamin C (ascorbic acid, C6H8O6) is a strong antioxidant, which can further enhance the deoxidation effect of the oxygen scavenger composition. Vitamin C reacts with dissolved oxygen through its reducing action to generate harmless by-products, thereby improving the overall deoxidation efficiency.

[0032] Polyethylene glycol (PEG), as a dispersant, can significantly improve the solubility and dispersibility of the deoxidizer composition in water, ensuring the uniform distribution of each component in water, thereby enhancing the deoxidation effect. PEG, through its hydrophilic molecular structure, helps other active components dissolve and disperse better in water.

[0033] Acetone oxime (C3H7NO) has good reducibility and chelating ability and can react with dissolved oxygen. At the same time, acetone oxime can combine with metal ions in water to form chelates, reducing the formation of corrosion products.

[0034] Malic acid, as a pH regulator, can adjust the pH value of the deoxidizer composition solution to ensure that the deoxidation reaction proceeds under optimal conditions. Malic acid combines with metal ions through the following reaction, and this chelation helps prevent metal corrosion. At the same time, the organic acid nature of malic acid can stabilize the pH value of the solution.

[0035] The specific reactions are as follows:

[0036] (1) 2Na2SO3 + O2 → 2Na2SO4

[0037] (2) BTA + Fe → Fe - BTA

[0038] (3) C6H8O6 + O2 → C6H6O6 + H2O

[0039] (4) C3H7NO + O2 → C3H7NO2

[0040] (5) HOOC - CH2CH(OH) - COOH + Fe 2+ → Fe

[0041] The preparation methods of the main components of the deoxidizer composition of the present invention are as follows: First, prepare high-purity sulfur dioxide gas and sodium hydroxide solution. Pass the sulfur dioxide gas into 500 liters of sodium hydroxide solution (concentration 20%) at an appropriate amount (about 50 liters per hour) to generate sodium sulfite through the following reaction. Remove the insoluble substances by filtration, evaporate and concentrate the obtained solution, and crystallize to obtain pure sodium sulfite. Prepare 100 grams of o-phenylenediamine and 150 grams of sodium nitrite solution (10%). Under acidic conditions, mix o-phenylenediamine with sodium nitrite for reaction to generate diazide, and further cyclize to form benzotriazole. Prepare 200 milliliters of acetone and 150 milliliters of hydroxylamine solution (10%). Under acidic conditions, acetone and hydroxylamine undergo a condensation reaction to generate acetone oxime. Prepare 500 grams of maleic acid and 200 milliliters of water. In the presence of a nickel catalyst, maleic acid undergoes a hydrogenation reaction to generate malic acid.

[0042] The deoxidation auxiliary agent of the present invention is a combination of benzotriazole (BTA), vitamin C (ascorbic acid, C6H8O6), and acetone oxime (C3H7NO). The deoxidation auxiliary agent plays a catalytic deoxidation role, which can accelerate the reaction rate between the main deoxidation agent sodium sulfite and dissolved oxygen, thereby effectively improving the removal rate of low-concentration dissolved oxygen and reducing the dosage of the main deoxidation agent. Among them, benzotriazole (BTA) acts as a corrosion inhibitor. Through the overlap of the π electrons of its aromatic ring with the 3d empty orbitals of metal Fe atoms, a π-d bond is formed, enhancing its adsorption ability on the metal surface, strengthening the chemisorption effect, and significantly enhancing the corrosion inhibition ability. In addition, the protective film formed by BTA on the metal surface can effectively prevent metal corrosion. Vitamin C (ascorbic acid, C6H8O6) is a strong antioxidant. The phenolic hydroxyl group in its molecule is easy to react with dissolved oxygen to form quinone compounds, and then the quinone substances continue to react with dissolved oxygen to form carboxylic acid substances. On the other hand, the quinone substances can also be reduced to polyhydroxyphenols by the main agent of the deoxidizer composition or its decomposition products such as hydrazine and carbohydrazide, and the polyhydroxyphenols continue to react with dissolved oxygen to generate quinone substances again. Such a cycle improves the deoxidation efficiency. Acetone oxime (C3H7NO) has good reducibility and chelating ability, and can react with dissolved oxygen to form carboxylic acid substances. At the same time, acetone oxime can chelate metal ions in water, reduce the generation of corrosion products, and avoid the deposition of metal salts inside the pipeline or boiler. Malic acid is used as a pH regulator. The carboxyl group in its molecule can chelate with metal ions to form a complex, thereby avoiding the deposition of metal salts inside the pipeline or boiler. In addition, malic acid can react with dissolved oxygen at high temperature to form carboxylic acid substances, and has a significant synergistic deoxidation effect with the nitrogen-containing functional groups in the main deoxidation agent. The deoxidation auxiliary agent in the deoxidizer composition of the present invention has a good synergistic effect with the main deoxidation agent, can effectively reduce the dosage of the main deoxidation agent, and accelerate the reaction rate between the main deoxidation agent and dissolved oxygen, thereby improving the removal rate of dissolved oxygen. The deoxidation auxiliary agents are all reducing substances, which can effectively stabilize the redox potential of the system and improve the use efficiency of the main deoxidation agent. At the same time, the deoxidation auxiliary agent has a corrosion inhibition effect, and can form a protective film on the surface of carbon steel to avoid the corrosion of carbon steel. This is because the lone pair electrons in the deoxidation auxiliary agent molecule can share free electron pairs with metal atoms or undergo charge transfer, thereby forming a strong chemical bond and forming a chemisorption layer on the metal surface, blocking the contact between dissolved oxygen and the metal.

[0043] Among them, the dispersant is polyethylene glycol. The dispersant is used to ensure the relative stability of the entire deoxidizer system and extend the storage period of the deoxidizer.

[0044] Among them, the pH regulator is malic acid. As an organic acid, the main role of malic acid in the present invention is to adjust the pH value of the deoxidizer composition solution to maintain it within a suitable range, thereby optimizing the efficiency of the deoxidation reaction. The carboxyl groups in the malic acid molecule can effectively neutralize the alkaline substances in water, maintain the acidic environment of the solution, and ensure the best reaction activity of the main deoxidizing agent and the auxiliary agent. In addition, malic acid has good chelating properties and can form stable complexes with metal ions (such as Fe 2+ , Cu 2+ ) in the solution, reducing the formation of metal oxides and precipitates and preventing the deposition of metal salts inside pipelines or boilers. Malic acid can react with dissolved oxygen at high temperatures to generate carboxylic acid substances, and its synergistic deoxidation effect with the nitrogen-containing functional groups in the main deoxidizing agent is significant. Specifically, malic acid reacts with dissolved oxygen at high temperatures to generate carboxylic acid substances such as 2-hydroxybutanedioic acid. These reaction products further adsorb on the metal surface to form a protective layer, enhancing the anti-corrosion effect. By adjusting the pH value of the solution and its chelating properties, malic acid not only improves the overall deoxidation efficiency of the deoxidizer composition but also significantly reduces the corrosion risk of metal pipelines and the inner walls of boilers.

[0045] The preparation method of the above deoxidizer composition is specifically as follows: Add the formulated amount of deionized water to a beaker, and add the formulated amount of dispersant under stirring to make it fully mixed; then add the main deoxidizing agent. After the main deoxidizing agent is completely dissolved, add the formulated amount of auxiliary deoxidizing agent to make it completely dissolved; finally, add the formulated amount of pH regulator, and stir and mix to obtain the deoxidizer composition.

[0046] The application of the above deoxidizer composition in assisting boiler thermal deoxidation is specifically as follows: After the purified water passes through the thermal deaerator, the dissolved oxygen in the water body drops to 10 mg / L or below, and then the deoxidizer composition is added to the deaeration water tank or the pipeline of the boiler feed water. The dosing amount is generally 45:1500; after the deoxidation reaction with the deoxidizer composition of the present invention, the dissolved oxygen in the boiler water drops to below 3 mg / L.

[0047] Example 1

[0048] The deoxidizer composition of this example consists of the following components in parts by mass: 0.4% sodium sulfite (Na2SO3), 0.2% benzotriazole (BTA), 0.1% vitamin C (ascorbic acid, C6H8O6), 0.05% polyethylene glycol (PEG), 0.2% acetone oxime (C3H7NO), and 0.2% malic acid, with the balance being deionized water. Among them, the main deoxidizing agent consists of sodium sulfite (Na2SO3); the auxiliary deoxidizing agents consist of benzotriazole (BTA), vitamin C (ascorbic acid, C6H8O6), and acetone oxime (C3H7NO), and their mixing mass ratio is 1:0.5:1; the dispersant is polyethylene glycol (PEG); the pH regulator is malic acid.

[0049] The above deoxidizer composition is prepared by the following method, which specifically includes the following steps: First, weigh the mass parts of each component according to the formula, including weighing 0.4 g of sodium sulfite, 0.2 g of benzotriazole, 0.1 g of vitamin C, 0.05 g of polyethylene glycol, 0.2 g of acetone oxime, and 0.2 g of malic acid. Then, dissolve each component in an appropriate amount (such as 20 mL) of deionized water, stir and mix well to ensure that all components are completely dissolved and evenly distributed. Finally, filter the mixed solution to remove insoluble substances to obtain the final deoxidizer composition solution for standby. Take 45 μL of the deoxidizer composition solution and add it to 15 mL of the water sample to be treated, and measure the change in dissolved oxygen before and after the addition.

[0050] Example 2

[0051] The deoxidizer composition of this example consists of the following components in parts by mass: 0.5% sodium sulfite (Na2SO3), 0.3% benzotriazole (BTA), 0.15% vitamin C (ascorbic acid, C6H8O6), 0.07% polyethylene glycol (PEG), 0.25% acetone oxime (C3H7NO), and 0.25% malic acid, with the balance being deionized water. Among them, the main deoxidizing agent consists of sodium sulfite (Na2SO3); the auxiliary deoxidizing agents consist of benzotriazole (BTA), vitamin C (ascorbic acid, C6H8O6), and acetone oxime (C3H7NO), and their mixing mass ratio is 1:0.5:0.8; the dispersant is polyethylene glycol (PEG); the pH regulator is malic acid.

[0052] The above deoxidizer composition is prepared by the following method, which specifically includes the following steps: First, weigh the mass parts of each component according to the formula, including weighing 0.5 grams of sodium sulfite, 0.3 grams of benzotriazole, 0.15 grams of vitamin C, 0.07 grams of polyethylene glycol, 0.25 grams of acetone oxime, and 0.25 grams of malic acid. Then, dissolve each component in an appropriate amount of deionized water, stir and mix well to ensure that all components are completely dissolved and evenly distributed. Finally, filter the mixed solution to remove insoluble substances to obtain the final deoxidizer composition solution for standby. Take 45 μL of the deoxidizer composition solution and add it to 15 ml of the water sample to be treated, and measure the change in dissolved oxygen content before and after the addition.

[0053] Comparative Example 3

[0054] Purchase a commercial deoxidizer composition (HD-008A of Qinglingling Energy Saving Technology Co., Ltd.) for comparison. Take 45 μL of the deoxidizer composition solution and add it to 15 ml of the water sample to be treated, and measure the change in dissolved oxygen content before and after the addition.

[0055] Experimental equipment: two-necked flask, dissolved oxygen analyzer, constant temperature oil bath, electronic balance.

[0056] Experimental method: Use an electronic balance to accurately weigh the mass of each component and add it to a two-necked flask. Add an appropriate amount of deionized water to make the total volume of the solution reach 100 ml. As Figure 1 shown, place the flask in a constant temperature oil bath, set the temperature to 85 °C, and use a magnetic stirrer to continuously stir to ensure that all components are completely dissolved and evenly mixed. Take the deoxidizer composition according to the ratio and add it to the water sample to be treated. Use a micro dissolved oxygen analyzer (Oxygen2300) to monitor the dissolved oxygen concentration in the solution in real time, and record the initial dissolved oxygen concentration and the change in dissolved oxygen concentration at different time points. During the experiment, maintain a constant temperature and sample regularly, and evaluate the deoxidation effect of the deoxidizer composition by analyzing the change in dissolved oxygen concentration.

[0057] Table 1 shows the deoxidation effects of the deoxidizer compositions of Examples 1-2 and Comparative Example 1

[0058]

[0059] The experimental results show that the changes in dissolved oxygen concentration at different time points for Example 1, Example 2, and Comparative Example 1 are as follows: At 0 minutes, the dissolved oxygen concentration of Example 1 is 5.06 mg / L, that of Example 2 is 5.10 mg / L, and that of Comparative Example 1 is 5.08 mg / L. At 1 minute, the dissolved oxygen concentrations of Example 1, Example 2, and Comparative Example 1 drop to 3.85 mg / L, 3.70 mg / L, and 4.25 mg / L respectively. At 5 minutes, the dissolved oxygen concentration of Example 1 further drops to 13.4 mg / L, that of Example 2 is 14 mg / L, and that of Comparative Example 1 is 20 μg / L. After stabilization at 20 minutes, they are 2.3 μg / L, 14 μg / L, and 19.8 μg / L respectively (as Figure 2 shown).

[0060] It can be seen from this that the deoxidizer compositions used in Example 1 and Example 2 significantly reduce the concentration of dissolved oxygen in a short time, and the reduction amplitude is significantly better than that of Comparative Example 1. Specifically, Example 2 has the best dissolved oxygen removal effect at 1 minute and 5 minutes, indicating that this formulation performs excellently in improving the deoxidation efficiency. In addition, although Comparative Example 1 also shows a certain deoxidation effect, its deoxidation efficiency is significantly lower than that of Example 1 and Example 2.

[0061] By comprehensively comparing the experimental data of the examples and the comparative examples, the following conclusions can be drawn: The deoxidizer composition formulations of Example 1 and Example 2 have high deoxidation efficiency, can rapidly reduce the dissolved oxygen concentration in a short time, and the final stable value is significantly lower than that of Comparative Example 1. And as Figure 3 shown, the potentiodynamic polarization curves of Q235 steel in different solutions show that the potential of the deoxidizer is more negative and the corrosion tendency is smaller. This indicates that the multi-component synergistic deoxidation formulation proposed in the present invention has significant advantages in improving the deoxidation effect and efficiency, can more effectively prevent the oxidation corrosion of metal components in the boiler system, has a corrosion inhibition effect, prolongs the service life of equipment, and improves the operation reliability and economy of the industrial boiler system.

[0062] It should be noted that the above-described embodiments are only the preferred embodiments of the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, several modifications, improvements, and equivalent replacements can be made to the present invention, and these modifications, improvements, and equivalent replacements are also considered to fall within the protection scope of the claims of the present invention.

Claims

1. An oxygen scavenger composition for deoxygenating feed water of an atmospheric pressure boiler, characterized in that, It is composed of the following components in parts by mass: 300 to 500 parts of the main deoxidizer, 100 to 300 parts of the auxiliary deoxidizer, 50 to 200 parts of the pH regulator, 10 to 100 parts of the dispersant, and the balance of deionized water, wherein the main deoxidizer is sodium sulfite, and the auxiliary deoxidizer includes benzotriazole, vitamin C, and acetone oxime.

2. The deoxidizer composition according to claim 1, characterized in that, The concentration of the sodium sulfite is 0.3% - 0.5%.

3. The deoxidizer composition according to claim 1, wherein The benzotriazole is used as a corrosion inhibitor, and its concentration is 0.1% - 0.3%.

4. The deoxidizer composition according to claim 1, characterized in that, The vitamin C is used as a strong oxidant, and its concentration is 0.1% - 0.2%.

5. The deoxidizer composition according to claim 1, characterized in that, The concentration of the acetone oxime is 0.1% - 0.2%.

6. The deoxidizer composition according to claim 1, characterized in that The pH regulator is malic acid.

7. The deoxidizer composition according to claim 6, characterized in that, The concentration of the malic acid is 0.1% - 0.2%.

8. The deoxidizer composition according to claim 1, wherein The dispersant is polyethylene glycol.

9. The deoxidizer composition according to claim 8, characterized in that, The concentration of the polyethylene glycol is 0.05% - 0.1%.

10. A method for preparing an oxygen scavenger composition according to any one of claims 1 to 9, characterized in that, It includes the following steps: In a reaction vessel, add an appropriate amount of deionized water and heat it to 30 - 50 °C; Slowly add sodium sulfite with a concentration of 0.4% - 0.5%, stir at a stirring speed of 200 - 300 rpm for 10 - 20 minutes until completely dissolved; gradually add benzotriazole with a concentration of 0.2% to 0.3%, and maintain the stirring speed at 100 - 200 rpm, and continue stirring for 15 - 25 minutes; add vitamin C with a concentration of 0.1% to 0.15%, and adjust the temperature of the solution to 25 - 35 °C during this period, and the stirring time is 5 - 15 minutes; Then add polyethylene glycol with a concentration of 0.05% to 0.1%, keep the stirring speed at 50 - 100 rpm, and extend the stirring time to 20 - 30 minutes; add acetone oxime with a concentration of 0.2% - 0.3% and malic acid with a concentration of 0.2% - 0.25% in sequence, keep the temperature of the solution at 20 - 30 °C, and the stirring time is 10 - 20 minutes; finally, let the solution stand and cool to room temperature, supplement an appropriate amount of deionized water and mix well until all components are completely dissolved and evenly distributed.

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