Double-helix reinforced structure dust suppressant capable of being rapidly condensed at normal temperature and preparation method of double-helix reinforced structure dust suppressant

Abstract

The invention belongs to the technical field of railway transportation dust treatment, and particularly relates to a double-helix reinforced structure dust suppressant capable of being rapidly condensed at normal temperature and a preparation method thereof.The dust suppressant is prepared from, by weight, 30-35 parts of binder, 20-25 parts of thickener, 3-5 parts of high-molecular polymer, 3-6 parts of surfactant, 2-5 parts of volatilization aid and 20-25 parts of coalescing agent. And water. The double-helix reinforced structure dust suppressant capable of quickly condensing at normal temperature prepared by the invention is a light-color transparent solution, and a compact cured layer can be formed on the surface of coal. Test results show that the coagulation rate of the dust suppressant prepared by the invention can reach 73.52%, the coagulation rate is high, the wind erosion rate is less than 1%, and the dust suppressant has high wind erosion resistance and high dust suppression efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of railway transportation dust control, and in particular relates to a double-helix reinforced structure dust suppressant that condenses quickly at room temperature and a preparation method thereof. Background Art

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

[0003] However, the chemical dust suppressants currently on the market still have problems such as slow solidification layer formation and low strength. In practical applications, since the solidification layer cannot be formed quickly, it takes a long time for chemical dust suppressants to play an effective role after spraying. This is not possible in some scenarios where rapid dust suppression is required, such as railway coal transportation environments, and it is impossible to prevent the generation and spread of dust in time; at the same time, the solidification layer formed by chemical dust suppressants is not strong enough and is easily damaged by external factors. For example, in strong winds, once the solidification 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 can quickly solidify at room temperature. Summary of the invention

[0005] In order to solve the technical problems of slow formation and low strength of the solidified layer of chemical dust suppressants at room temperature, the present invention provides a double-helix reinforced structure dust suppressant that condenses quickly at room temperature and a preparation method thereof. The present invention utilizes the property of sodium dodecyl sulfate that can reduce surface tension to accelerate the evaporation rate of water molecules, and at the same time utilizes the strong volatility of ethyl acetate to drive water to evaporate more easily, thereby increasing the evaporation rate of the dust suppressant and further improving the curing efficiency of the dust suppressant; considering the low strength of the solidified layer, the property of hydrogen bonding of xanthan gum to form a high molecular double helix structure is utilized to enhance the adhesion of the solution, and at the same time, sodium lignin sulfonate is utilized to enhance the force, strengthen the double helix structure, and further improve 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 scheme: a double-helix reinforced structure dust suppressant that quickly 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 high molecular polymer, 3-6 parts of a surfactant, 2-5 parts of a volatilizer, 20-25 parts of a film-forming aid, and water.

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

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

[0009] As a further improvement of the technical solution of the dust suppressant of the present invention, the high molecular polymer is sodium lignin sulfonate.

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

[0011] As a further improvement of the dust suppressant technical solution of the present invention, the propellant is ethyl acetate.

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

[0013] As a further improvement of the technical solution of the dust suppressant of the present invention, a double-helix reinforced structure dust suppressant that quickly 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 high molecular polymer, 4.5 parts of a surfactant, 3 parts of a volatilizer, 22 parts of a film-forming aid, and water.

[0014] The present invention further provides a method for preparing a double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature, comprising the following steps: S1. Weigh each raw material by weight; S2. Stir water and xanthan gum to dissolve, then slowly add guar gum and stir until there are no bubbles to obtain a mixed solution; S3. After sodium lignin sulfonate and sodium dodecyl sulfate were added to the reaction vessel, the primary mixed solution was added, and the solution was heated to 45 ° C and stirred for 30 min until there were no bubbles on the surface of the solution to obtain a secondary mixed solution; S4. The secondary mixed solution was naturally cooled to 25-35°C, ethyl acetate was added to the secondary mixed solution and stirred for 20 minutes, and then polyvinyl alcohol was added and dissolved and stirred for 30 minutes to obtain a double helix reinforced structure dust suppressant.

[0015] As a further improvement of 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.

[0016] The double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature and the preparation method thereof provided by the present invention have the following advantages compared with the prior art: The double-helix reinforced structure dust suppressant prepared by the present invention, which rapidly solidifies at room temperature, is a light-colored transparent solution and can form a dense solidified layer on the surface of coal. Test results show that the dust suppressant prepared by the present invention has a coagulation rate of 73.52%, a fast coagulation rate, a wind erosion rate of less than 1%, and has a high wind erosion resistance rate and high dust suppression efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 These are 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 coal powder.

[0020] Figure 2 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 coal powder, left at room temperature of 25°C for 2 hours, dried in a drying oven at 55°C for 2 hours, and then subjected to a wind erosion test. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] The present invention provides a specific embodiment of a double-helix reinforced structure dust suppressant that solidifies quickly 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 high molecular polymer, 3-6% of a surfactant, 2-5% of a volatilizer, 20-25% of a film-forming aid, and water.

[0024] Wherein, 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 binding property of the solution.

[0025] Further preferably, the thickener is guar gum. The high molecular polymer is sodium lignin sulfonate. Compared with other high molecular polymers, the sodium lignin sulfonate used in the present invention has the characteristic of strengthening the interaction of the binder. The surfactant is sodium dodecyl sulfate, and the volatile promoter is ethyl acetate.

[0026] More preferably, the film-forming aid is polyvinyl alcohol. The polyvinyl alcohol used in the present invention has a significant film-forming effect compared to other film-forming aids.

[0027] In the present invention, under the action of the high molecular weight polymer sodium lignin sulfonate, the double helix structure formed by the binder xanthan gum is strengthened, thereby improving the strength of the solidified layer. The addition of the thickener guar gum can improve the cohesiveness of the solution. On this basis, the surfactant sodium dodecyl sulfate is used to reduce the surface tension, thereby promoting the water molecules in the solvent to achieve a more efficient evaporation process, and the addition of the volatile aid 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 solidified layer, thereby improving the strength and toughness of the solidified layer.

[0028] Further preferably, the double-helix reinforced structure dust suppressant that quickly solidifies at room temperature described in the present invention is prepared from the following raw materials in parts by weight: 33 parts of binder, 22 parts of thickener, 3.5 parts of high molecular polymer, 4.5 parts of surfactant, 3 parts of propellant, 22 parts of film-forming aid, and water.

[0029] The present invention further provides a method for preparing a double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature, comprising the following steps: S1. Weigh each raw material by weight; S2. Stir water and xanthan gum to dissolve, then slowly add guar gum and stir until there are no bubbles to obtain a mixed solution; S3. After sodium lignin sulfonate and sodium dodecyl sulfate were added to the reaction vessel, the primary mixed solution was added, and the solution was heated to 45 ° C and stirred for 30 min until there were no bubbles on the surface of the solution to obtain a secondary mixed solution; S4. The secondary mixed solution was naturally cooled to 25-35°C, ethyl acetate was added to the secondary mixed solution and stirred for 20 minutes, and then polyvinyl alcohol was added and dissolved and stirred for 30 minutes to obtain a double helix reinforced structure dust suppressant.

[0030] Furthermore, in steps S2 to S4, the stirring speed of each stirring step is 300-400 r / min.

[0031] The specific embodiments of the present invention are described in detail below. The following experiments were conducted in accordance with the provisions of TB / T 3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation", and the coal samples of 10-30 mesh were screened using a standard sieve. The screened coal samples were placed in a drying oven, dried at (55±5°C) for 6 hours to remove moisture, and then left to stand at room temperature (20°C) for 2 hours to complete the coal sample preparation.

[0032] Example 1

[0033] ① Add 30g of water and 30g of xanthan gum to a beaker, stir to dissolve, then slowly add 20g of guar gum, stir until there are no bubbles, to obtain a primary mixed solution; ② After adding 3g of sodium lignin sulfonate and 3g of sodium dodecyl sulfate into the reaction container, add the primary mixed solution, heat the solution to 45°C and stir for 30min until there are no bubbles on the surface of the solution to obtain a secondary mixed solution; ③ The secondary mixed solution was naturally cooled to 28°C, 2 g of ethyl acetate was added to the secondary mixed solution and stirred for 20 min, and then 20 g of polyvinyl alcohol was added, dissolved and stirred for 30 min to obtain dust suppressant I.

[0034] Example 2

[0035] ① Add 33g of water and 33g of xanthan gum to a beaker, stir to dissolve, then slowly add 22g of guar gum, stir until there are no bubbles, to obtain a primary mixed solution; ② After adding 3.5 g of sodium lignin sulfonate and 4.5 g of sodium dodecyl sulfate into the reaction container, add the 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; ③ The secondary mixed solution was naturally cooled to 28°C, 3 g of ethyl acetate was added to the secondary mixed solution and stirred for 20 min, and then 22 g of polyvinyl alcohol was added, dissolved and stirred for 30 min to obtain dust suppressant II.

[0036] Example 3

[0037] ① Add 35g of water and 35g of xanthan gum to a beaker, stir to dissolve, then slowly add 25g of guar gum, stir until there are no bubbles, to obtain a primary mixed solution; ② After adding 5 g of sodium lignin sulfonate and 6 g of sodium dodecyl sulfate into the reaction container, add the 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; ③ The secondary mixed solution was naturally cooled to 28°C, 5 g of ethyl acetate was added to the secondary mixed solution and stirred for 20 min, and then 25 g of polyvinyl alcohol was added, dissolved and stirred for 30 min to obtain dust suppressant III.

[0038] Comparative Example 1 The preparation components of Comparative Example 1 are: 33 g of xanthan gum, 22 g of guar gum, 4.5 g of sodium lauryl sulfate, 3 g of ethyl acetate, 22 g of polyvinyl alcohol, and 33 g of water.

[0039] The preparation steps of Comparative Example 1 are the same as those of Example 2, except that the sodium lignin sulfonate in step ② is removed.

[0040] Comparative Example 2 The preparation components of Comparative Example 2 are: 33 g of hydroxyethyl cellulose, 22 g of guar gum, 3.5 g of sodium lignin sulfonate, 4.5 g of sodium lauryl sulfate, 3 g of ethyl acetate, 22 g of polyvinyl alcohol, and 33 g of water.

[0041] The preparation steps of Comparative Example 2 are the same as those of Example 2, except that the xanthan gum in step ① is replaced with hydroxyethyl cellulose.

[0042] Comparative Example 3 The preparation components of Comparative Example 3 are: 33 g of xanthan gum, 22 g of guar gum, 3.5 g of sodium lignin sulfonate, 22 g of polyvinyl alcohol, and 33 g of water.

[0043] The preparation steps of Comparative Example 3 are the same as those of Example 2, except that sodium lauryl sulfate and ethyl acetate in steps ② and ③ are removed.

[0044] The dilution mentioned in the following tests 1 and 2 specifically refers to diluting the stock solution with water, and the mass ratio of the raw material (excluding water) to water in the diluted solution is 1:100.

[0045] The effects of Examples 1, 2, and 3 and Comparative Examples 1, 2, and 3 were compared by testing. The following experiments were conducted in accordance with the provisions of TB / T3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation", and 10-30 mesh coal samples were screened using a standard sieve. The screened coal samples were placed in a drying oven, dried at (55±5°C) for 6 hours to remove moisture, and then left to stand at room temperature (20°C) for 2 hours to complete the coal sample preparation.

[0046] Test 1 The dust suppressant I prepared in Example 1 was mixed with water for dilution. The obtained dust suppressant solution was tested according to the provisions of TB / T3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation". The performance was as follows:

[0047] According to the provisions of TB / T 3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation", according to the measurement results: the dust suppressant solution of Example 1 meets the technical requirements.

[0048] The dust suppressant II prepared in Example 2 was mixed with water for dilution. The dust suppressant solution was tested according to the provisions of TB / T 3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation" and the performance was as follows:

[0049] After the dust suppressant solution of Example 2 is sprayed on the surface of the coal seam, a dense film layer is formed on the surface of the coal seam. Since the proportion of each substance in the preparation process is increased, the viscosity and curing performance are increased compared with Example 1. According to the provisions of TB / T3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation", according to the measurement results: the dust suppressant solution of Example 2 meets the technical requirements.

[0050] The dust suppressant III prepared in Example 3 was mixed with water for dilution. The obtained dust suppressant solution was tested according to the provisions of TB / T3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation". The performance was as follows:

[0051] After the dust suppressant solution of Example 3 was sprayed on the surface of the coal seam, due to the excessive addition of high molecular weight polymer sodium lignin sulfonate, the double helix structure of the dust suppressant molecules attracted the coal powder molecules unevenly, resulting in a decrease in the solidification performance. According to the provisions of TB / T 3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation", according to the test results: the dust suppressant solution of Example 3 meets the technical requirements.

[0052] The dust suppressant prepared in Comparative Example 1 was mixed with water for dilution. The obtained dust suppressant solution was tested according to the provisions of TB / T3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation" and the performance was as follows:

[0053] Compared with Example 2, the performance of Comparative Example 1 is insufficient, with a wind erosion rate of 1.2% and a solidified layer thickness of 8.9 mm. This is because the strengthening effect of sodium lignin sulfonate is lacking, the double helix structure of the xanthan gum molecules in the dust suppressant is relatively loose, and the attraction to the film-forming aid molecules and the thickener molecules is insufficient, resulting in insufficient action of the formed dust suppressant molecules on the coal powder molecules, resulting in the solidified layer being not dense and of insufficient thickness, which does not meet the technical detection requirements.

[0054] The dust suppressant of comparative example 2 was mixed with water for dilution, and the obtained dust suppressant solution was tested according to the provisions of TB / T 3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation", and the performance was as follows:

[0055] After the dust suppressant solution of Comparative Example 2 was sprayed on the surface of the coal sample, the thickness of the solidified layer formed was low, the wind erosion resistance was poor, and the dust suppression effect did not meet the detection requirements. This is because hydroxyethyl cellulose, as a binder, has a bonding effect, but sodium lignin sulfonate cannot strengthen its structure, which reduces the interaction between the dust suppressant molecules, resulting in insufficient thickness of the solidified layer and high wind erosion rate.

[0056] The dust suppressant of comparative example 3 was mixed with water for dilution. The obtained dust suppressant solution was tested according to the provisions of TB / T 3210 "Technical Conditions for Dust Suppression in Railway Coal Transportation" and the performance was as follows:

[0057] After the dust suppressant solution of Comparative Example 3 was sprayed on the surface of the coal seam, the condensation rate of the dust suppressant on the surface of the coal sample was slow due to the lack of addition of surfactant and propellant, and the thickness of the solidified layer formed was reduced compared with that of Example 2. The test results show that Comparative Example 3 has better dust suppression performance, but after adding surfactant and propellant, Example 2 not only has a good dust suppressant effect, but also has a fast condensation rate.

[0058] Test 2 The coagulation rate test is performed on the double helix reinforced structure dust suppressants that rapidly coagulate 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, and 3 and Comparative Examples 1, 2, and 3 are diluted with water, and the obtained dust suppressant solutions are tested as follows.

[0059] The test method is as follows: take the same mass of coal powder and place it in a culture dish of the same size, and spray the same mass of dust suppressant solution of Examples 1, 2, 3 and Comparative Examples 1, 2, 3 (see Figure 1), place the culture dish in a drying oven at 40°C (in order to shorten the test time, this test uses a temperature slightly higher than room temperature). After 2h, 3h and 4h, take out the samples and weigh their masses to calculate the coagulation rate of the samples. The test results are shown in the table below.

[0060]

[0061] from Figure 1 It can be seen that the dust suppressant solutions of Examples 1, 2, and 3 have good wettability compared to Comparative Examples 1, 2, and 3, and can quickly penetrate into the coal seam. According to the results of analysis test 2, the condensation rates of Examples 1, 2, and 3 during the drying process are faster 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 early stage of drying, no solidified layer is formed when the dust suppressant is sprayed on the surface of the coal powder. At this time, the dust suppressant solution with the addition of surfactants and propellants, under the action of low surface tension and propellants, water can evaporate from liquid molecules to gaseous molecules faster, which accelerates the formation of the solidified layer and increases the condensation rate. After 4 hours of drying, the dust suppressant forms a dense solidified layer on the surface of the coal sample, preventing the evaporation of water at the bottom of the culture dish. Under the action of the outside world, it is observed that the solidified layer has no deformation, indicating that the strength of the solidified layer is large. The comparison shows that the addition of an appropriate proportion of surfactants and propellants can increase the condensation rate of the dust suppressant.

[0062] It can be seen that the present invention designs different dust suppressant ratios, tests the solidified layer thickness, wind erosion resistance, condensation rate, etc. of the prepared dust suppressant, so as to judge the dust suppression effect of the dust suppressant. Among them, the optimal ratio sample is Example 2: solidified layer thickness (12mm), wind erosion rate (0.15%), condensation rate (73.52%), indicating that the present invention has good dust suppression performance and improves the condensation rate of the dust suppressant at room temperature.

[0063] In summary, the double-helix reinforced structure dust suppressant prepared by the present invention that quickly solidifies at room temperature has a good dust suppression effect, can quickly solidify at room temperature to form a solidified layer with good wind erosion resistance and high strength, and can meet the requirements of dust suppression in coal transportation; in addition, the preparation method of the present invention is convenient, the raw materials do not contain heavy metals and other harmful substances, and are safe and reliable.

[0064] The above is only a specific implementation of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A double-helix reinforced structure dust suppressant that condenses rapidly at room temperature, characterized in that: The invention 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 high molecular polymer, 3-6 parts of a surfactant, 2-5 parts of a volatilizer, 20-25 parts of a film-forming aid, and water.

2. The double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature according to claim 1, characterized in that: The binder is xanthan gum.

3. The double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature according to claim 2, characterized in that: The thickener is guar gum.

4. The double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature according to claim 3, characterized in that: The high molecular polymer is sodium lignin sulfonate.

5. The double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature according to claim 4, characterized in that: The surfactant is sodium lauryl sulfate.

6. The double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature according to claim 5, characterized in that: The propellant is ethyl acetate.

7. The double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature according to claim 6, characterized in that: The film-forming aid is polyvinyl alcohol.

8. The double-helix reinforced dust suppressant with rapid solidification at room temperature according to claim 7, characterized in that: The 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 high molecular polymer, 4.5 parts of a surfactant, 3 parts of a volatilizer, 22 parts of a film-forming aid, and water.

9. The method for preparing the double-helix reinforced structure dust suppressant that rapidly solidifies at room temperature as claimed in claim 7 or 8, characterized in that: The following steps are involved: S1. Weigh each raw material by weight; S2. Stir water and xanthan gum to dissolve, then slowly add guar gum and stir until there are no bubbles to obtain a mixed solution; S3. After sodium lignin sulfonate and sodium dodecyl sulfate were added to the reaction vessel, the primary mixed solution was added, and the solution was heated to 45 ° C and stirred for 30 min until there were no bubbles on the surface of the solution to obtain a secondary mixed solution; S4. The secondary mixed solution was naturally cooled to 25-35°C, ethyl acetate was added to the secondary mixed solution and stirred for 20 minutes, and then polyvinyl alcohol was added and dissolved and stirred for 30 minutes to obtain a double helix reinforced structure dust suppressant.

10. The method for preparing the double-helix reinforced dust suppressant with rapid solidification at room temperature according to claim 9, characterized in that: In steps S2 to S4, the stirring speed of each stirring step is 300-400 r / min.

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