Efficient wet desulfurization synergist and preparation method thereof

Abstract

The application discloses a kind of high-efficiency wet desulfurization synergist and preparation method thereof, it is related to flue gas desulfurization technical field.The high-efficiency wet desulfurization synergist includes the following weight parts of raw materials: sodium formate 10-20 parts, citric acid 5-10 parts, dibasic acid 20-30 parts, surfactant 5-6 parts, magnesium salt 15-20 parts, sodium salt 12-18 parts, pH buffering agent 2-5 parts;The present application is generated by trimerization cyanuric chloride and dodecylamine reaction single-substituted compound;After reaction with L-aspartic acid, double-substituted compound is generated;Again, with diethylenetriamine reaction, double triazine ring compound is generated;Finally, with 2-chloroethyl sulfonic acid sodium reaction, surfactant is generated.The high-efficiency wet desulfurization synergist prepared by the present application has desulfurization effect.

Description

Technical Field

[0001] This invention relates to the field of flue gas desulfurization technology, specifically to a high-efficiency wet desulfurization enhancer and its preparation method. Background Technology

[0002] The current energy structure is highly dependent on coal, with over 84% of coal used through combustion. The flue gas emitted from coal combustion contains large amounts of SO2 and NO. x Pollutants such as limestone and gypsum contribute to environmental pollution. Existing limestone-gypsum wet flue gas desulfurization (FGD) systems in thermal power plants generally suffer from high energy consumption, high operating costs, and poor adaptability to different coal sulfur content levels. While FGD efficiency can be improved by modifying the desulfurization equipment system, this method is difficult to implement due to the high cost and long construction period of capacity expansion. Therefore, adding desulfurization enhancers to the limestone slurry to achieve the designed desulfurization efficiency of the system without modifying the existing equipment has become a key research focus in the desulfurization industry.

[0003] Chinese invention patent CN108114587A discloses a desulfurization enhancer for wet flue gas desulfurization. The desulfurization enhancer includes the following raw materials by weight percentage: 54%-65% sodium dextran bisulfate, 5%-9% disodium lauryl sulfonate monoester, 7%-12% polyvinyl alcohol, 12%-16% citric acid, 2%-5% sodium carboxymethyl cellulose, and 1%-4% sodium phenolate red. The desulfurization enhancer provided by this invention can effectively reduce SO2 emissions, will not corrode the steel and rubber lining of the original system, and does not cause secondary pollution, but its desulfurization efficiency is generally low. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a highly efficient wet desulfurization enhancer and its preparation method.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-efficiency wet desulfurization enhancer comprises the following raw materials in parts by weight:

[0007] Sodium formate 10-20 parts, citric acid 5-10 parts, dicarboxylic acid 20-30 parts, surfactant 5-6 parts, magnesium salt 15-20 parts, sodium salt 12-18 parts, pH buffer 2-5 parts;

[0008] The surfactant is prepared by the following method:

[0009] S1: Cyanurium chloride reacts with dodecylamine to form a monosubstituted compound; the reaction equation is shown below.

[0010]

[0011] S2: L-Aspartic acid reacts with a monosubstituted compound to form a disubstituted compound; the reaction equation is shown below:

[0012]

[0013] S3: The disubstituted compound reacts with diethylenetriamine to form a bis(triazine) ring compound; the reaction equation is shown below.

[0014]

[0015] S4: The bis(triazine) ring compound reacts with sodium 2-chloroethylsulfonate to form a surfactant; the reaction equation is shown below.

[0016]

[0017] In step S1, the molar ratio of cyanuric chloride to dodecylamine is 1:(1-1.2).

[0018] In step S2, the molar ratio of L-aspartic acid to the monosubstituted compound is (1.1-1.3):1.

[0019] In step S3, the molar ratio of the disubstituted compound to diethylenetriamine is (2.1-2.2):1.

[0020] In step S4, the molar ratio of the bistriazine ring compound to sodium 2-chloroethylsulfonate is 1:(2.1-2.3).

[0021] The dicarboxylic acid is one of adipic acid or sebacic acid.

[0022] The magnesium salt is one of magnesium chloride and magnesium sulfate.

[0023] The sodium salt is either sodium sulfate or sodium chloride.

[0024] The pH buffer is one of potassium phosphate buffer or sodium phosphate buffer.

[0025] A method for preparing a high-efficiency wet desulfurization enhancer includes the following steps:

[0026] (1) Weigh out the following by weight: 10-20 parts sodium formate, 5-10 parts citric acid, 20-30 parts dicarboxylic acid, 5-6 parts surfactant, 15-20 parts magnesium salt, 12-18 parts sodium salt, and 2-5 parts pH buffer.

[0027] (2) Mix and stir the above materials until they are fully mixed and uniform. Add them to a planetary ball mill and grind them into powder to obtain a high-efficiency wet desulfurization enhancer.

[0028] Due to the adoption of the above technical solutions, the beneficial effects of the present invention include:

[0029] This invention prepares a novel surfactant, which, when added to the formulation of a desulfurization enhancer, can improve the adsorption capacity of SO2 by increasing solubility, surface hydration, and adsorption, thus exhibiting excellent desulfurization efficiency. Detailed Implementation

[0030] The following description, in conjunction with specific embodiments, provides further details, but the present invention is not limited to these embodiments.

[0031] Example 1: Preparation of surfactants:

[0032] S1: Under ice bath conditions, 200 ml of toluene and 0.1 mol of cyanuric chloride were added to the reaction vessel and stirred until well mixed. 50 ml of a toluene solution containing 0.1 mol of dodecylamine was added dropwise over 30 min. The reaction was maintained at 0 °C for 4 h. The mixture was washed successively with 50 ml of 0.1 mol / L hydrochloric acid solution and 50 ml of deionized water. The organic phase was dried over 10 g of anhydrous magnesium sulfate, filtered, and distilled under reduced pressure at 60 °C for 3 h to obtain the monosubstituted compound. Its 1H NMR data are as follows: 1 H NMR (300 MHz, Chloroform- d ) δ 6.24 (t, J =4.6 Hz, 1H), 3.53 (td, J = 7.2, 4.6 Hz, 2H), 1.79 - 1.64 (m, 2H), 1.41 - 1.20(m, 18H), 0.97 - 0.82 (m, 3H);

[0033] S2: Add 150 ml of acetone and 0.1 mol of the monosubstituted compound to the reaction vessel and stir to mix. Dissolve 0.11 mol of L-aspartic acid in 150 ml of 5 wt% NaOH aqueous solution and add it dropwise to the reaction vessel. After 1 h of addition, adjust the pH to 11 with 1 M NaOH aqueous solution, raise the temperature to 30 °C, and react for 6 h. Cool to room temperature, adjust the pH to 2 with 1 M hydrochloric acid solution, and extract three times with toluene (200 ml each time). Combine the organic phases, wash with 200 ml of deionized water, dry with 30 g of anhydrous magnesium sulfate, filter, and distill under reduced pressure at 60 °C for 3 h to obtain the disubstituted compound. Its 1H NMR data are as follows: 1 H NMR (300 MHz, Chloroform- d) δ 11.96 (s, 1H), 10.01 (s, 1H), 9.00 (d, J = 8.2 Hz, 1H), 6.17(t, J = 4.6 Hz, 1H), 4.81 (q, J = 8.3 Hz, 1H), 3.52 (td, J = 7.1, 4.6 Hz,2H), 3.18 - 3.04 (m, 1H), 2.85 (dd, J = 16.8, 8.4 Hz, 1H), 1.78 - 1.65 (m,2H), 1.41 - 1.21 (m, 18H), 0.95 - 0.84 (m, 3H);

[0034] S3: Add 200 ml of deionized water, 8 g of NaOH, and 0.21 mol of the disubstituted compound to a reaction vessel and stir until well mixed. Then, dissolve 0.1 mol of diethylenetriamine in 50 ml of acetone and add it dropwise to the reaction vessel over 30 min. After the addition is complete, raise the temperature to 60 °C and react for 8 h. Adjust the pH to 2 using 1 mol / L hydrochloric acid solution. Extract three times with toluene (200 ml each time). Combine the organic phases, wash with 200 ml of deionized water, dry with 30 g of anhydrous magnesium sulfate, filter, and distill under reduced pressure at 60 °C for 3 h to obtain the bistriazine ring compound. Its 1H NMR data are as follows: 1 H NMR (300 MHz, Chloroform- d ) δ 11.96 (s, 2H), 10.01(s, 2H), 9.03 (d, J = 8.2 Hz, 2H), 6.31 (t, J = 4.7 Hz, 2H), 6.20 (t, J = 4.6Hz, 2H), 4.81 (q, J = 8.3 Hz, 2H), 3.75 (q, J = 4.9 Hz, 4H), 3.52 (td, J =7.2, 4.6 Hz, 4H), 3.18 - 2.99 (m, 6H), 2.92 - 2.78 (m, 3H), 1.79 - 1.64 (m,4H), 1.42 - 1.21 (m, 36H), 0.97 - 0.82 (m, 6H);

[0035] S4: 100 ml of deionized water, 0.21 mol of sodium 2-chloroethylsulfonate, and 0.5 mol of sodium carbonate were added to a reaction vessel and stirred to dissolve. 300 ml of acetone solution containing 0.1 mol of the bis(triazine) ring compound was added dropwise over 1 hour. The mixture was then heated to 50°C and reacted for 20 hours. After cooling to room temperature, 500 ml of anhydrous ethanol was added and stirred to precipitate the product. The precipitate was filtered and dried under vacuum at 50°C for 24 hours to obtain the surfactant. Its 1H NMR data are as follows: 1 H NMR (300 MHz, Chloroform- d ) δ 8.61 (t, J = 3.4 Hz, 2H), 7.97 (d, J = 8.1 Hz, 2H), 6.20 (t, J = 4.6 Hz, 2H), 4.92 (dt, J = 8.2, 7.4Hz, 2H), 4.07 - 3.94 (m, 8H), 3.91 - 3.81 (m, 4H), 3.58 - 3.43 (m, 8H), 3.29- 3.15 (m, 2H), 2.96 (dd, J = 16.8, 7.3 Hz, 2H), 1.79 - 1.64 (m, 4H), 1.42 -1.21 (m, 36H), 0.95 - 0.85 (m, 6H).

[0036] Example 2: Preparation of surfactants:

[0037] S1: Under ice bath conditions, 200 ml of toluene and 0.1 mol of cyanuric chloride were added to the reaction vessel and stirred until well mixed. 50 ml of toluene solution containing 0.11 mol of dodecylamine was added dropwise over 30 min. The reaction was carried out at 0 °C for 5 h. The mixture was washed successively with 50 ml of 0.1 mol / L hydrochloric acid solution and 50 ml of deionized water. The organic phase was dried with 10 g of anhydrous magnesium sulfate, filtered, and distilled under reduced pressure at 60 °C for 3 h to obtain the monosubstituted compound.

[0038] S2: Add 150 ml of acetone and 0.1 mol of the monosubstituted compound to the reaction vessel and stir to mix. Dissolve 0.12 mol of L-aspartic acid in 150 ml of 5 wt% NaOH aqueous solution and add it dropwise to the reaction vessel. After 1 h of addition, adjust the pH value to 11 with 1 M NaOH aqueous solution, raise the temperature to 40 °C and react for 5 h. Cool to room temperature and adjust the pH value to 2 with 1 M hydrochloric acid solution. Extract three times with toluene (200 ml each time), combine the organic phases, wash with 200 ml of deionized water, dry with 30 g of anhydrous magnesium sulfate, filter, and distill under reduced pressure at 60 °C for 3 h to obtain the disubstituted compound.

[0039] S3: Add 200 ml of deionized water, 8 g of NaOH, and 0.215 mol of the disubstituted compound to the reaction vessel and stir to mix. Then, dissolve 0.1 mol of diethylenetriamine in 50 ml of acetone and add it dropwise to the reaction vessel. After the addition is completed in 30 min, raise the temperature to 65 °C and react for 6 h. Adjust the pH value to 2 with 1 mol / L hydrochloric acid solution. Extract three times with toluene (200 ml each time). Combine the organic phases, wash with 200 ml of deionized water, dry with 30 g of anhydrous magnesium sulfate, filter, and distill under reduced pressure at 60 °C for 3 h to obtain the bistriazine ring compound.

[0040] S4: Add 100 ml of deionized water, 0.22 mol of sodium 2-chloroethyl sulfonate and 0.5 mol of sodium carbonate to a reaction vessel, stir to dissolve, add 300 ml of acetone solution containing 0.1 mol of bis(triazine) ring compound dropwise, and add dropwise over 1 hour. Heat to 55°C and react for 18 hours. Cool to room temperature, add 500 ml of anhydrous ethanol, stir to precipitate, filter, and vacuum dry at 50°C for 24 hours to obtain the surfactant.

[0041] Example 3: Preparation of surfactants:

[0042] S1: Under ice bath conditions, 200 ml of toluene and 0.1 mol of cyanuric chloride were added to the reaction vessel and stirred until well mixed. 50 ml of toluene solution containing 0.12 mol of dodecylamine was added dropwise over 30 min. The reaction was carried out at 0 °C for 6 h. The mixture was washed successively with 50 ml of 0.1 mol / L hydrochloric acid solution and 50 ml of deionized water. The organic phase was dried with 10 g of anhydrous magnesium sulfate, filtered, and distilled under reduced pressure at 60 °C for 3 h to obtain the monosubstituted compound.

[0043] S2: Add 150 ml of acetone and 0.1 mol of the monosubstituted compound to the reaction vessel and stir to mix. Dissolve 0.13 mol of L-aspartic acid in 150 ml of 5 wt% NaOH aqueous solution and add it dropwise to the reaction vessel. After 1 h, adjust the pH value to 11 with 1 M NaOH aqueous solution, raise the temperature to 50 °C and react for 4 h. Cool to room temperature and adjust the pH value to 2 with 1 M hydrochloric acid solution. Extract three times with toluene (200 ml each time), combine the organic phases, wash with 200 ml of deionized water, dry with 30 g of anhydrous magnesium sulfate, filter, and distill under reduced pressure at 60 °C for 3 h to obtain the disubstituted compound.

[0044] S3: Add 200 ml of deionized water, 8 g of NaOH, and 0.22 mol of the disubstituted compound to the reaction vessel and stir to mix. Then, dissolve 0.1 mol of diethylenetriamine in 50 ml of acetone and add it dropwise to the reaction vessel. After the addition is completed in 30 min, raise the temperature to 70 °C and react for 5 h. Adjust the pH value to 2 with 1 mol / L hydrochloric acid solution. Extract three times with toluene (200 ml each time). Combine the organic phases, wash with 200 ml of deionized water, dry with 30 g of anhydrous magnesium sulfate, filter, and distill under reduced pressure at 60 °C for 3 h to obtain the bistriazine ring compound.

[0045] S4: Add 100 ml of deionized water, 0.23 mol of sodium 2-chloroethylsulfonate and 0.5 mol of sodium carbonate to a reaction vessel, stir to dissolve, add 300 ml of acetone solution containing 0.1 mol of bis-triazine ring compound dropwise, and add the solution dropwise over 1 hour. Heat to 60°C and react for 15 hours. Cool to room temperature, add 500 ml of anhydrous ethanol, stir to precipitate, filter, and vacuum dry at 50°C for 24 hours to obtain the surfactant.

[0046] Example 4: Preparation of a high-efficiency wet desulfurization synergist:

[0047] (1) Weigh out: 10g sodium formate, 5g citric acid, 20g adipic acid, 5g surfactant (prepared in Example 1), 15g magnesium chloride, 12g sodium sulfate, and 2g potassium phosphate buffer.

[0048] (2) Mix the above materials and stir at 300 r / min for 20 min at room temperature; add the mixed materials into a planetary ball mill, using grinding balls with a diameter of 5 mm and 3 mm, with a weight ratio of 5 mm grinding balls to 3 mm grinding balls of 2:1 and a ball-to-material ratio of 15:1, grind at 500 r / min for 15 min, stop for 15 min, grind at 500 r / min for another 15 min, and pass through a 1500 mesh sieve to obtain a high-efficiency wet desulfurization enhancer.

[0049] Example 5: Preparation of a high-efficiency wet desulfurization synergist:

[0050] (1) Weigh out: 15g sodium formate, 8g citric acid, 28g adipic acid, 5.6g surfactant (prepared in Example 2), 18g magnesium sulfate, 16g sodium sulfate, and 4g potassium phosphate buffer;

[0051] (2) Mix the above materials and stir at 300 r / min for 20 min at room temperature; add the mixed materials into a planetary ball mill, using grinding balls with a diameter of 5 mm and 3 mm, with a weight ratio of 5 mm grinding balls to 3 mm grinding balls of 2:1 and a ball-to-material ratio of 15:1, grind at 500 r / min for 15 min, stop for 15 min, grind at 500 r / min for another 15 min, and pass through a 1500 mesh sieve to obtain a high-efficiency wet desulfurization enhancer.

[0052] Example 6: Preparation of a high-efficiency wet desulfurization synergist:

[0053] (1) Weigh out: 20g sodium formate, 10g citric acid, 30g sebacic acid, 6g surfactant (prepared in Example 3), 20g magnesium sulfate, 18g sodium chloride, and 5g sodium phosphate buffer.

[0054] (2) Mix the above materials and stir at 300 r / min for 20 min at room temperature; add the mixed materials into a planetary ball mill, using grinding balls with a diameter of 5 mm and 3 mm, with a weight ratio of 5 mm grinding balls to 3 mm grinding balls of 2:1 and a ball-to-material ratio of 15:1, grind at 500 r / min for 15 min, stop for 15 min, grind at 500 r / min for another 15 min, and pass through a 1500 mesh sieve to obtain a high-efficiency wet desulfurization enhancer.

[0055] Comparative Example 1

[0056] The raw material composition and preparation method of the high-efficiency wet desulfurization enhancer are basically the same as those in Example 5, except that the surfactant (prepared in Example 2) is replaced with an equal weight of a surfactant prepared by the following method:

[0057] The preparation method of the surfactant is basically the same as that in Example 2, except that the amount of sodium 2-chloroethylsulfonate added in step S4 is replaced with 0.1 mol.

[0058] Comparative Example 2

[0059] The raw material composition and preparation method of the high-efficiency wet desulfurization enhancer are basically the same as those in Example 5, except that the surfactant is replaced with an equal weight of a surfactant prepared by the following method:

[0060] The preparation method of the surfactant is basically the same as that in Example 2, except that L-aspartic acid in step S1 is replaced with an equimolar amount of γ-aminobutyric acid.

[0061] Comparative Example 3

[0062] The raw material composition and preparation method of the high-efficiency wet desulfurization enhancer are basically the same as those in Example 5, except that the surfactant is replaced with an equal weight of a surfactant prepared by the following method:

[0063] The preparation method of the surfactant is basically the same as that in Example 2, except that the dodecylamine in step S2 is replaced with an equimolar amount of n-butylamine.

[0064] Comparative Example 4

[0065] The raw material composition and preparation method of the high-efficiency wet desulfurization enhancer are basically the same as those in Example 5, except that the surfactant is replaced with an equal weight of a surfactant prepared by the following method:

[0066] The preparation method of the surfactant is basically the same as that in Example 2, except that the cyanuric chloride in step S1 is replaced with an equimolar amount of 1,2,3-trichloropropane.

[0067] The potassium phosphate buffer used in this application is prepared by the following method: weigh 7.63g of dipotassium hydrogen phosphate and 9.83g of potassium dihydrogen phosphate, add them to 800ml of deionized water, stir to dissolve, and then bring the volume to 1L with deionized water to obtain the potassium phosphate buffer; the sodium phosphate buffer is prepared by the following method: weigh 7.48g of disodium hydrogen phosphate and 8.81g of sodium dihydrogen phosphate, add them to 800ml of deionized water, stir to dissolve, and then bring the volume to 1L with deionized water to obtain the sodium phosphate buffer.

[0068] The desulfurization enhancers prepared in Examples 4-6 and Comparative Examples 1-4 of this application were applied to the flue gas desulfurization equipment of a wet desulfurization system for flue gas desulfurization, and the steps are as follows:

[0069] (1) Prepare limestone slurry by mixing limestone (calcium carbonate content 97.8 wt%) with water at a weight ratio of 15:100;

[0070] (2) The desulfurization enhancer prepared in this application is added to the above limestone slurry, wherein the desulfurization enhancer accounts for 2wt% of the total mass, the temperature is controlled at 50℃, the rotation speed is 500r / min, and the mixture is stirred for 4h;

[0071] (3) Add limestone slurry with added desulfurization enhancer into the absorption tower and conduct performance tests: The SO2 concentration of the inlet flue gas is designed to be 2000 mg / Nm³. 3 In the desulfurization system, the concentration of SO2 in the outlet flue gas is monitored, and then the desulfurization efficiency is calculated. The desulfurization efficiency is calculated as (inlet SO2 concentration - outlet SO2 concentration) / inlet SO2 concentration. The results are shown in Table 1.

[0072] Table 1 Performance Test Data

[0073]

[0074] As can be seen from Table 1, the high-efficiency wet desulfurization enhancers prepared in Examples 4-6 of this application exhibit good desulfurization efficiency when added to limestone slurry.

[0075] The surfactant prepared in this application contains carboxyl groups, sulfonic acid groups, quaternary ammonium salts, hydrophobic long-chain alkyl groups, and triazine rings. The carboxyl and sulfonic acid groups interact with Ca through electrostatic reactions. 2+The formation of complexes can effectively improve the solubility of limestone and directly enhance SO2 absorption efficiency. Long-chain alkyl groups adsorb onto the surface of CaCO3 through hydrophobic association, with polar hydrophilic groups (carboxyl groups, sulfonic acid groups, quaternary ammonium salts) facing outward, making the CaCO3 surface hydrophilic, reducing particle agglomeration and expanding the effective reaction area, thereby indirectly improving SO2 absorption efficiency through enhanced mass transfer. The dipole-dipole interaction between the N atom in the triazine ring and the S atom in SO2, as well as the hydrogen bond interaction between the O atom in SO2 and the H in -NH-, work synergistically to enhance its adsorption capacity for SO2.

[0076] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. However, any modifications, alterations, and variations made by those skilled in the art without departing from the scope of the present invention based on the disclosed technical content are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A high-efficiency wet desulfurization synergist, characterized in that, The ingredients include the following parts by weight: Sodium formate 10-20 parts, citric acid 5-10 parts, dicarboxylic acid 20-30 parts, surfactant 5-6 parts, magnesium salt 15-20 parts, sodium salt 12-18 parts, pH buffer 2-5 parts; The surfactant is prepared by the following method: S1: Cyanurium chloride reacts with dodecylamine to form a monosubstituted compound; S2: L-Aspartic acid reacts with monosubstituted compounds to form disubstituted compounds; S3: The disubstituted compound reacts with diethylenetriamine to form a bistriazine ring compound; S4: Bistriazine ring compounds react with sodium 2-chloroethylsulfonate to form surfactants; The structural formula of the surfactant is shown below: 。 2. The high-efficiency wet desulfurization synergist according to claim 1, characterized in that, In step S1, the molar ratio of cyanuric chloride to dodecylamine is 1:(1-1.2).

3. The high-efficiency wet desulfurization synergist according to claim 1, characterized in that, In step S2, the molar ratio of L-aspartic acid to the monosubstituted compound is (1.1-1.3):

1.

4. The high-efficiency wet desulfurization synergist according to claim 1, characterized in that, In step S3, the molar ratio of the disubstituted compound to diethylenetriamine is (2.1-2.2):

1.

5. The high-efficiency wet desulfurization synergist according to claim 1, characterized in that, In step S4, the molar ratio of the bistriazine ring compound to sodium 2-chloroethylsulfonate is 1:(2.1-2.3).

6. The high-efficiency wet desulfurization synergist according to claim 1, characterized in that, The dicarboxylic acid is one of adipic acid or sebacic acid.

7. The high-efficiency wet desulfurization synergist according to claim 1, characterized in that, The magnesium salt is one of magnesium chloride and magnesium sulfate.

8. The high-efficiency wet desulfurization synergist according to claim 1, characterized in that, The sodium salt is either sodium sulfate or sodium chloride.

9. The high-efficiency wet desulfurization synergist according to claim 1, characterized in that, The pH buffer is one of potassium phosphate buffer or sodium phosphate buffer.

10. A method for preparing the high-efficiency wet desulfurization enhancer according to any one of claims 1-9, characterized in that, Includes the following steps: (1) Weigh out the following by weight: 10-20 parts sodium formate, 5-10 parts citric acid, 20-30 parts dicarboxylic acid, 5-6 parts surfactant, 15-20 parts magnesium salt, 12-18 parts sodium salt, and 2-5 parts pH buffer. (2) Mix and stir the above materials until they are fully mixed and uniform. Add them to a planetary ball mill and grind them into powder to obtain a high-efficiency wet desulfurization enhancer.

Images