Dust Suppressant with Double-Helix Reinforced Structure for Rapid Condensation at Normal Temperature and Its Preparation Method

Abstract

The present invention belongs to the technical field of railway transportation dust control, and particularly relates to a dust suppressant with a double - helix strengthening structure that rapidly condenses at room temperature and its preparation method. The dust suppressant is prepared from the following raw materials in parts by weight: 30 - 35 parts of a binder, 20 - 25 parts of a thickener, 3 - 5 parts of a polymer, 3 - 6 parts of a surfactant, 2 - 5 parts of a co - volatilizer, 20 - 25 parts of a film - forming aid, and water. The dust suppressant with a double - helix strengthening structure that rapidly condenses at room temperature prepared by the present invention is a light - colored transparent solution, which can form a dense solidified layer on the surface of coal. The test results show that the condensation rate of the dust suppressant prepared by the present invention can reach 73.52%, the condensation rate is fast, the wind erosion rate is less than 1%, and it has a high wind erosion resistance rate and a high dust suppression efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of railway transportation dust control, and particularly relates to a dust suppressant with a double-helix strengthening structure that rapidly condenses at room temperature and a preparation method thereof. Background Art

[0002] China's coal resources are mainly distributed in North China, East China and Southwest China. Among them, the coal reserves in North China are the most abundant, especially in provinces such as Shanxi, Inner Mongolia and Hebei. The regional distribution of coal resources is extremely inconsistent with the distribution of consumption areas. At present, the regional differences in coal production and demand are mainly solved through railway transportation. However, during the railway coal transportation process, a large amount of dust will be generated, causing coal losses and environmental pollution along the way. The existing dust suppression methods for railway coal transportation mainly include sprinkling water, laying dust-proof nets, using closed carriage structures and spraying chemical dust suppressants. Among them, the chemical dust suppressants have prominent advantages such as effectiveness, economy and high adaptability to automated production, and are considered to be the best method for dust suppression in railway coal transportation.

[0003] However, the chemical dust suppressants on the current market still have problems such as slow formation of the solidified layer and low strength. In practical applications, due to the slow formation of the solidified layer, the chemical dust suppressant needs a long time to play an effective role after spraying. In some scenarios that require rapid dust suppression, such as the railway coal transportation environment, it cannot prevent the generation and diffusion of dust in time; at the same time, the strength of the solidified layer formed by the chemical dust suppressant is insufficient and is easily damaged under the interference of external factors. For example, in the case of strong winds, once the solidified layer is damaged, its dust suppression effect will be greatly reduced.

[0004] Therefore, there is an urgent need to develop a chemical dust suppressant that rapidly condenses and solidifies at room temperature. Summary of the Invention

[0005] In order to solve the technical problems of slow formation of the solidified layer and low strength of the room-temperature chemical dust suppressant, the present invention provides a dust suppressant with a double-helix strengthening structure that rapidly condenses at room temperature and a preparation method thereof. The present invention utilizes the property of sodium dodecyl sulfate to reduce the surface tension to accelerate the evaporation rate of water molecules. At the same time, the strong volatility of ethyl acetate is used to drive the water to evaporate more easily, improving the evaporation rate of the dust suppressant and further enhancing the curing efficiency of the dust suppressant. Considering the low strength of the solidified layer, the property of xanthan gum to form a polymer double-helix structure through hydrogen bonds is utilized to enhance the adhesiveness of the solution. At the same time, sodium lignosulfonate is used to enhance the acting force and strengthen the double-helix structure, further improving the strength of the formed solidified layer. In addition, the film-forming property of polyvinyl alcohol is utilized to form a uniform and dense film on the surface of the solidified layer to improve the strength and toughness of the solidified layer.

[0006] The present invention is achieved through the following technical solutions: A dust suppressant with a double-helix reinforced structure that rapidly solidifies at room temperature is prepared from the following raw materials in parts by weight: 30 - 35 parts of a binder, 20 - 25 parts of a thickener, 3 - 5 parts of a polymer, 3 - 6 parts of a surfactant, 2 - 5 parts of a co-volatile agent, 20 - 25 parts of a film-forming auxiliary, and water.

[0007] As a further improvement to the technical solution of the dust suppressant of the present invention, the binder is xanthan gum.

[0008] As a further improvement to the technical solution of the dust suppressant of the present invention, the thickener is guar gum.

[0009] As a further improvement to the technical solution of the dust suppressant of the present invention, the polymer is sodium lignosulfonate.

[0010] As a further improvement to the technical solution of the dust suppressant of the present invention, the surfactant is sodium dodecyl sulfate.

[0011] As a further improvement to the technical solution of the dust suppressant of the present invention, the co-volatile agent is ethyl acetate.

[0012] As a further improvement to the technical solution of the dust suppressant of the present invention, the film-forming auxiliary is polyvinyl alcohol.

[0013] As a further improvement to the technical solution of the dust suppressant of the present invention, a dust suppressant with a double-helix reinforced structure that rapidly solidifies at room temperature is prepared from the following raw materials in parts by weight: 33 parts of a binder, 22 parts of a thickener, 3.5 parts of a polymer, 4.5 parts of a surfactant, 3 parts of a co-volatile agent, 22 parts of a film-forming auxiliary, and water.

[0014] The present invention further provides a preparation method for a dust suppressant with a double-helix reinforced structure that rapidly solidifies at room temperature, including the following steps:

[0015] S1. Weigh each raw material according to the parts by weight.

[0016] S2. Dissolve water and xanthan gum by stirring, then slowly add guar gum and stir until there are no bubbles, obtaining a primary mixed solution.

[0017] S3. Add sodium lignosulfonate and sodium dodecyl sulfate to a reaction vessel, then add the above primary mixed solution, heat the solution to 45°C and stir for 30 min until there are no bubbles on the surface of the solution, obtaining a secondary mixed solution.

[0018] S4. Naturally cool the secondary mixed solution to 25 - 35°C, add ethyl acetate to the secondary mixed solution and stir for 20 min, then add polyvinyl alcohol, dissolve and stir for 30 min to prepare the dust suppressant with a double-helix reinforced structure.

[0019] As a further improvement to the technical solution of the preparation method of the present invention, in steps S2 to S4, the stirring speed of each stirring step is 300 - 400 r / min.

[0020] The quick-setting double-helix reinforced structure dust suppressant at room temperature and its preparation method provided by the present invention have the following advantages compared with the prior art:

[0021] The quick-setting double-helix reinforced structure dust suppressant at room temperature prepared by the present invention is a light-colored transparent solution, which can form a dense solidified layer on the surface of coal. The test results show that the setting rate of the dust suppressant prepared by the present invention can reach 73.52%, the setting rate is fast, and the wind erosion rate is less than 1%, with a high wind erosion resistance rate and a high dust suppression efficiency. Description of the Drawings

[0022] The drawings herein are incorporated into the specification and form a part of the specification, showing embodiments in line with the present invention, and are used together with the specification to explain the principles of the present invention.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 Pictures of the dust suppressant solutions prepared in Examples 1, 2, and 3 of the present invention and the solutions prepared in Comparative Examples 1, 2, and 3 after being sprayed on the surface of pulverized coal.

[0025] Figure 2 Pictures of the state after the dust suppressant solutions prepared in Examples 1, 2, and 3 of the present invention and the solutions prepared in Comparative Examples 1, 2, and 3 are sprayed on the surface of a certain pulverized coal, placed at room temperature of 25°C for 2 h, then dried in an oven at 55°C for 2 h, and then subjected to wind erosion testing. Detailed Embodiments

[0026] In order to be able to more clearly understand the above objects, features, and advantages of the present invention, the following will further describe the solution of the present invention. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] Many specific details are set forth in the following description in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0028] The present invention provides a specific embodiment of a double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature, which is prepared from the following components in parts by weight: 30-35% of a binder, 20-25% of a thickener, 3-5% of a polymer, 3-6% of a surfactant, 2-5% of a co-volatile agent, 20-25% of a film-forming aid, and water.

[0029] Among them, the binder is xanthan gum. Compared with other binders, the xanthan gum used in the present invention has a double-helix structure at the microscopic level, which can significantly enhance the adhesiveness of the solution.

[0030] Further preferably, the thickener is guar gum. The polymer is sodium lignosulfonate. Compared with other polymers, the sodium lignosulfonate used in the present invention has the characteristic of strengthening the interaction of the binder. The surfactant is sodium dodecyl sulfate, and the co-volatile agent is ethyl acetate.

[0031] Further preferably, the film-forming aid is polyvinyl alcohol. Compared with other film-forming aids, the polyvinyl alcohol used in the present invention has a significant film-forming effect.

[0032] In the present invention, under the action of the polymer sodium lignosulfonate, the double-helix structure formed by the binder xanthan gum is strengthened, and the strength of the cured layer is improved. The addition of the thickener guar gum can improve the adhesiveness of the solution. On this basis, by using the surfactant sodium dodecyl sulfate to reduce the surface tension, the water molecules in the solvent are promoted to achieve a more efficient evaporation process. The addition of the co-volatile agent ethyl acetate further increases the evaporation rate of the water molecules, thereby improving the curing efficiency of the dust suppressant. At the same time, the film-forming property of polyvinyl alcohol can form a uniform and dense film on the surface of the cured layer, improving the strength and toughness of the cured layer.

[0033] Further preferably, the double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature according to the present invention is prepared from the following raw materials in parts by weight: 33 parts of a binder, 22 parts of a thickener, 3.5 parts of a polymer, 4.5 parts of a surfactant, 3 parts of a co-volatile agent, 22 parts of a film-forming aid, and water.

[0034] The present invention further provides a preparation method of a double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature, including the following steps:

[0035] S1. Weigh each raw material according to the parts by weight;

[0036] S2. Stir and dissolve water and xanthan gum, and then slowly add guar gum and stir until there are no bubbles to obtain a primary mixed solution;

[0037] S3. After adding sodium lignosulfonate and sodium dodecyl sulfate into the reaction vessel, add the above-mentioned primary mixed solution, heat the solution to 45 °C and stir for 30 min until there are no bubbles on the solution surface to obtain a secondary mixed solution;

[0038] S4. Let the secondary mixed solution cool naturally to 25 - 35 °C, add ethyl acetate to the secondary mixed solution and stir for 20 min, then add polyvinyl alcohol and dissolve and stir for 30 min to prepare the dust suppressant with double helix reinforced structure.

[0039] Further, in steps S2 to S4, the stirring speed for each stirring step is 300 - 400 r / min.

[0040] The specific embodiments of the present invention will be described in detail below. The following experiments are all carried out according to the regulations of TB / T 3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation" for the preparation of coal samples, and coal samples with a particle size of 10 - 30 mesh are taken using a standard sieve. Place the sieved coal samples in an oven and dry them for 6 h at (55 ± 5 °C) to remove moisture, and then let them stand at room temperature (20 °C) for 2 h to complete the preparation of coal samples.

[0041] Example 1

[0042] ① Add 30 g of water and 30 g of xanthan gum to a beaker, stir to dissolve, and then slowly add 20 g of guar gum and stir until there are no bubbles to obtain a primary mixed solution;

[0043] ② After adding 3 g of sodium lignosulfonate and 3 g of sodium dodecyl sulfate into the reaction vessel, add the above-mentioned primary mixed solution, heat the solution to 45 °C and stir for 30 min until there are no bubbles on the solution surface to obtain a secondary mixed solution;

[0044] ③ Let the secondary mixed solution cool naturally to 28 °C, add 2 g of ethyl acetate to the secondary mixed solution and stir for 20 min, then add 20 g of polyvinyl alcohol, dissolve and stir for 30 min to prepare Dust Suppressant Ⅰ.

[0045] Example 2

[0046] ① Add 33 g of water and 33 g of xanthan gum to a beaker, stir to dissolve, and then slowly add 22 g of guar gum and stir until there are no bubbles to obtain a primary mixed solution;

[0047] ② After adding 3.5 g of sodium lignosulfonate and 4.5 g of sodium dodecyl sulfate into the reaction vessel, add the above-mentioned primary mixed solution, heat the solution to 45 °C and stir for 30 min until there are no bubbles on the solution surface to obtain a secondary mixed solution;

[0048] ③The secondary mixed solution is naturally cooled to 28°C, 3 g of ethyl acetate is added to the secondary mixed solution and stirred for 20 min, and then 22 g of polyvinyl alcohol is added and dissolved and stirred for 30 min to obtain dust suppressant II.

[0049] Example 3

[0050] ①35 g of water and 35 g of xanthan gum are added to a beaker, stirred and dissolved, and then 25 g of guar gum is slowly added and stirred until there are no bubbles to obtain a primary mixed solution;

[0051] ②After adding 5 g of sodium lignosulfonate and 6 g of sodium dodecyl sulfate to the reaction vessel, the primary mixed solution is added, and the solution is heated to 45°C and stirred for 30 min until there are no bubbles on the solution surface to obtain a secondary mixed solution;

[0052] ③The secondary mixed solution is naturally cooled to 28°C, 5 g of ethyl acetate is added to the secondary mixed solution and stirred for 20 min, and then 25 g of polyvinyl alcohol is added and dissolved and stirred for 30 min to obtain dust suppressant III.

[0053] Comparative Example 1

[0054] The preparation components of Comparative Example 1 are: 33 g of xanthan gum, 22 g of guar gum, 4.5 g of sodium dodecyl sulfate, 3 g of ethyl acetate, 22 g of polyvinyl alcohol, and 33 g of water.

[0055] The preparation steps of Comparative Example 1 are the same as those of Example 2. Only sodium lignosulfonate is removed in step ②.

[0056] Comparative Example 2

[0057] The preparation components of Comparative Example 2 are: 33 g of hydroxyethyl cellulose, 22 g of guar gum, 3.5 g of sodium lignosulfonate, 4.5 g of sodium dodecyl sulfate, 3 g of ethyl acetate, 22 g of polyvinyl alcohol, and 33 g of water.

[0058] The preparation steps of Comparative Example 2 are the same as those of Example 2. Only xanthan gum is replaced with hydroxyethyl cellulose in step ①.

[0059] Comparative Example 3

[0060] The preparation components of Comparative Example 3 are: 33 g of xanthan gum, 22 g of guar gum, 3.5 g of sodium lignosulfonate, 22 g of polyvinyl alcohol, and 33 g of water.

[0061] The preparation steps of Comparative Example 3 are the same as those of Example 2. Only sodium dodecyl sulfate and ethyl acetate in steps ② and ③ are removed.

[0062] The dilution mentioned in Tests 1 and 2 below specifically refers to diluting the stock solution with water, and the mass ratio of the raw materials (except water) to water in the diluted solution is 1:100.

[0063] The usage effects of Examples 1, 2, 3 and Comparative Examples 1, 2, 3 were compared through tests. For all the following experiments, the coal samples were prepared in accordance with the provisions of TB / T 3210 "Technical Conditions for Dust Suppression Technology in Railway Coal Transportation". Coal samples with a mesh size of 10 - 30 were taken using a standard sieve. The sieved coal samples were placed in a drying oven and dried for 6 hours at (55 ± 5°C) to remove moisture, and then left to stand for 2 hours at room temperature (20°C) to complete the preparation of the coal samples.

[0064] Test 1

[0065] The dust suppressant Ⅰ prepared in Example 1 was mixed with water for dilution. The performance of the obtained dust suppressant solution was measured in accordance with the provisions of TB / T 3210 "Technical Conditions for Dust Suppression Technology in Railway Coal Transportation" as follows:

[0066]

[0067] In accordance with the provisions of TB / T 3210 "Technical Conditions for Dust Suppression Technology in Railway Coal Transportation", according to the measurement results: the dust suppressant solution of Example 1 meets the technical requirements.

[0068] The dust suppressant Ⅱ prepared in Example 2 was mixed with water for dilution. The performance of the dust suppressant solution was measured in accordance with the provisions of TB / T 3210 "Technical Conditions for Dust Suppression Technology in Railway Coal Transportation" as follows:

[0069]

[0070] After the dust suppressant solution of Example 2 was sprayed on the surface of the coal seam, a dense film layer was formed on the surface of the coal seam. Due to the increase in the proportion of each substance in the preparation process, the viscosity and curing performance increased compared with Example 1. In accordance with the provisions of TB / T 3210 "Technical Conditions for Dust Suppression Technology in Railway Coal Transportation", according to the measurement results: the dust suppressant solution of Example 2 meets the technical requirements.

[0071] The dust suppressant Ⅲ prepared in Example 3 was mixed with water for dilution. The performance of the obtained dust suppressant solution was measured in accordance with the provisions of TB / T 3210 "Technical Conditions for Dust Suppression Technology in Railway Coal Transportation" as follows:

[0072]

[0073] After the dust suppressant solution of Example 3 was sprayed on the surface of the coal seam, due to the excessive addition of the high - molecular polymer sodium lignosulfonate, when the double - helix structure of the dust suppressant molecules unevenly enhanced the attraction of coal powder molecules, the curing performance decreased. In accordance with the provisions of TB / T 3210 "Technical Conditions for Dust Suppression Technology in Railway Coal Transportation", according to the measurement results: the dust suppressant solution of Example 3 meets the technical requirements.

[0074] The dust suppressant prepared in Comparative Example 1 was mixed with water for dilution, and the performance of the obtained dust suppressant solution was measured according to the provisions of TB / T 3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation" as follows:

[0075]

[0076] Compared with Example 2, the performance of Comparative Example 1 was insufficient. The wind erosion rate was 1.2%, and the thickness of the solidified layer was 8.9 mm. This was because the strengthening effect of sodium lignosulfonate was lacking, and the double-helix structure of xanthan gum molecules in the dust suppressant was relatively loose, with insufficient attraction to film-forming aid molecules and thickener molecules, resulting in insufficient force of the formed dust suppressant molecules on coal powder molecules, leading to an insufficiently dense and thin solidified layer, not meeting the technical detection requirements.

[0077] The dust suppressant in Comparative Example 2 was mixed with water for dilution, and the performance of the obtained dust suppressant solution was measured according to the provisions of TB / T 3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation" as follows:

[0078]

[0079] After the dust suppressant solution of Comparative Example 2 was sprayed on the surface of the coal sample, the thickness of the formed solidified layer was relatively low, the anti-wind erosion performance was poor, and the dust suppression effect did not meet the detection requirements. This was because although hydroxyethyl cellulose, as a binder, had a binding effect, sodium lignosulfonate could not strengthen its structure, reducing the interaction between dust suppressant molecules, resulting in an insufficient thickness of the formed solidified layer and a high wind erosion rate.

[0080] The dust suppressant in Comparative Example 3 was mixed with water for dilution, and the performance of the obtained dust suppressant solution was measured according to the provisions of TB / T 3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation" as follows:

[0081]

[0082] After the dust suppressant solution of Comparative Example 3 was sprayed on the surface of the coal seam, due to the absence of a surfactant and a co-volatilizer, the condensation rate of the dust suppressant on the coal sample surface was slow, and the thickness of the formed solidified layer was reduced compared with Example 2. The test results showed that Comparative Example 3 had good dust suppression performance, but after adding a surfactant and a co-volatilizer, Example 2 not only had a good dust suppression effect but also a fast condensation rate.

[0083] Test 2

[0084] Next, the condensation rate tests were carried out on the double-helix strengthened structure dust suppressants with rapid condensation at room temperature prepared in Examples 1 - 3 and the dust suppressants in Comparative Examples 1, 2, and 3. The dust suppressants in Examples 1, 2, 3 and Comparative Examples 1, 2, 3 were diluted with water, and the obtained dust suppressant solutions were tested as follows.

[0085] The test method is as follows: Take pulverized coal of the same mass and place it in petri dishes of the same size. Spray the dust suppressant solutions of Examples 1, 2, 3 and Comparative Examples 1, 2, 3 with the same mass on the surface of the coal seam (see Figure 1 ). Place the petri dishes in an oven at 40 °C (to shorten the test time, this test uses a temperature slightly higher than room temperature). After 2 h, 3 h, and 4 h, take out the samples respectively, weigh their masses, and calculate the condensation rate of the samples. The test results are shown in the following table.

[0086]

[0087] From Figure 1 it can be seen that the dust suppressant solutions of Examples 1, 2, and 3 have good wettability compared with those of Comparative Examples 1, 2, and 3, and can quickly penetrate into the coal seam. Analyzing the results of Test 2, the condensation rates of Examples 1, 2, and 3 are faster during the drying process, higher than those of Comparative Examples 1, 2, and 3. Among them, the condensation rate of Comparative Example 3 is the lowest. This is because in the initial stage of drying, when the dust suppressant is sprayed on the surface of the pulverized coal, no solidified layer is formed. At this time, for the dust suppressant solution added with surfactants and co-volatilizing agents, under the action of low surface tension and co-volatilizing agents, water can be evaporated from liquid molecules to gaseous molecules faster, accelerating the formation of the solidified layer and increasing the condensation rate. After 4 h of drying, a dense solidified layer is formed on the surface of the coal sample, preventing the evaporation of water at the bottom of the petri dish. Under external action, no deformation is observed in the solidified layer, indicating that the solidified layer has high strength. The comparison shows that adding appropriate proportions of surfactants and co-volatilizing agents can increase the condensation rate of the dust suppressant.

[0088] Thus, by designing different proportions of the dust suppressant, testing the thickness of the solidified layer, wind erosion resistance, condensation rate, etc. of the prepared dust suppressant, the dust suppression effect of the dust suppressant can be judged. Among them, the optimal proportion sample is Example 2: solidified layer thickness (12 mm), wind erosion rate (0.15%), condensation rate (73.52%), indicating that the present invention has good dust suppression performance and increases the condensation rate of the dust suppressant at room temperature.

[0089] In summary, the double-helix reinforced structure dust suppressant prepared by the present invention that quickly condenses at room temperature has good dust suppression effect, can quickly condense at room temperature to form a solidified layer with good wind erosion resistance and high strength, and can meet the requirements of coal transportation dust suppression; in addition, the preparation method of the present invention is convenient, the raw materials do not contain heavy metals and other harmful substances, and it is safe and reliable.

[0090] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Although the foregoing embodiments have been described in detail, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the respective embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A dust suppressant with a double - helix reinforcement structure that rapidly coagulates at normal temperature, characterized in that, It is prepared from the following raw materials in parts by weight: 30 - 35 parts of binder, 20 - 25 parts of thickener, 3 - 5 parts of polymer, 3 - 6 parts of surfactant, 2 - 5 parts of co-volatile agent, 20 - 25 parts of film-forming aid, and water; The binder is xanthan gum, the thickener is guar gum, the polymer is sodium lignosulfonate, the surfactant is sodium dodecyl sulfate, the co-volatile agent is ethyl acetate, and the film-forming aid is polyvinyl alcohol.

2. The dust suppressant with a double-helix reinforcement structure that rapidly coagulates at room temperature according to claim 1, wherein It is prepared from the following raw materials in parts by weight: 33 parts of binder, 22 parts of thickener, 3.5 parts of polymer, 4.5 parts of surfactant, 3 parts of co-volatile agent, 22 parts of film-forming aid, and water.

3. The preparation method of the double-helix reinforced structure dust suppressant with rapid condensation at normal temperature according to claim 1 or 2, characterized in that, It includes the following steps: S1. Weigh each raw material according to the parts by weight; S2. Dissolve water and xanthan gum by stirring, and then slowly add guar gum and stir until there are no bubbles to obtain a primary mixed solution; S3. Add sodium lignosulfonate and sodium dodecyl sulfate to a reaction vessel, then add the above primary mixed solution, heat the solution to 45°C and stir for 30 min until there are no bubbles on the surface of the solution to obtain a secondary mixed solution; S4. Naturally cool the secondary mixed solution to 25 - 35°C, add ethyl acetate to the secondary mixed solution and stir for 20 min, then add polyvinyl alcohol, dissolve and stir for 30 min to prepare the double-helix enhanced structure dust suppressant.

4. The preparation method of the double-helix reinforced structure dust suppressant with rapid condensation at normal temperature according to claim 3, characterized in that In steps S2 to S4, the stirring speed for each stirring step is 300 - 400 r / min.

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