High-efficiency adhesive wetting type foam dust suppressant and preparation method thereof

Abstract

The application relates to the technical field of foam dust suppressants, and particularly discloses a high-efficiency adhesive wetting type foam dust suppressant and a preparation method thereof. The high-efficiency adhesive wetting type foam dust suppressant comprises the following raw materials in percentage by weight: 0.15-0.24% of compounded surfactant; 0.06-0.2% of thickening binder; 0.06-0.15% of wetting agent; and the balance of water; wherein the compounded surfactant comprises biological surfactant and anionic surfactant in a mass ratio of 0.025-0.04:0.125-0.20. The foam dust suppressant can be used in the suppression of coal dust, the thickening binder forms a zipper network structure and a high viscoelastic layer, the strength and viscosity of the foam liquid film are enhanced, the breaking rate of the foam is reduced, and the adhesion to the coal dust is improved; after the wetting agent contacts the coal dust, the dissolution effect promotes the increase of the contact area, and the wetting performance of the dust suppressant to the coal dust is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of foam dust suppressants, and more specifically, to a high-efficiency adhesive wetting foam dust suppressant and a preparation method thereof. Background Art

[0002] my country possesses vast coal resources, and coal will remain the primary energy source for a long time to come. However, the mining and utilization of coal resources is often accompanied by the generation of large quantities of coal dust. High concentrations of dust can cause severe pollution, leading to pneumoconiosis and coal dust explosions, jeopardizing the health and safety of workers and coal mine production. In recent years, the increasing mechanization and automation of coal mining processes has significantly improved mining efficiency, but has also led to more serious coal dust hazards.

[0003] At present, the main dust reduction methods used include spray dust reduction. Compared with spray dust reduction, foam dust suppression technology has a high dust suppression rate for both total dust and respirable dust due to its wide coverage area, excellent adhesion, strong wettability, and low water consumption. It has become an important means of preventing and controlling coal dust.

[0004] Based on the principles of foam dust suppression, the adhesion and wettability of the foam film are the main factors affecting the efficiency of coal dust suppression. Initially, coal dust is suspended in the air before coming into contact with the foam film and adhering to its surface. Therefore, increasing the viscosity of the film can improve the foam's ability to capture coal dust and reduce its escape. After the coal dust adheres to the surface of the foam film, the liquid gradually spreads across the dust surface, and the solid-gas interface gradually transforms into a solid-liquid interface. The coal dust eventually infiltrates into the liquid film, completing the entire foam dust suppression process. Therefore, enhancing the wettability of the foam film can shorten the time it takes for coal dust to enter the film, allowing the film surface to quickly recover and regain its ability to capture coal dust, thereby helping to improve dust suppression efficiency.

[0005] As can be seen from the above, coal dust must first be adhered to by the foam before it has the opportunity to enter the wetting stage and ultimately achieve dust suppression. However, common foam dust suppressants on the market mainly focus on improving foaming ability and wettability, lacking attention to foam adhesion, resulting in the inability to further improve the foam dust suppression efficiency. In addition, the increase in foam liquid film viscosity often hinders the infiltration and migration of coal dust into the liquid film, prolonging the foam liquid film's wetting time on coal dust, resulting in the liquid film's surface being unable to quickly recover and regain its ability to recapture coal dust. Therefore, the simultaneous improvement of the foam liquid film's adhesion and wettability can further enhance the foam dust suppression efficiency. Summary of the Invention

[0006] In order to improve the shortcomings of common foam dust suppressants on the market in terms of adhesion and wetting, the present application provides a high-efficiency adhesion-wetting foam dust suppressant and a preparation method thereof, which adopts the following technical solutions:

[0007] In a first aspect, the present application provides a high-efficiency adhesive wetting foam dust suppressant, comprising the following raw materials in percentage by weight:

[0008] Compound surfactant 0.15-0.24%;

[0009] Thickening adhesive 0.06-0.2%;

[0010] Wetting agent 0.06-0.15%;

[0011] Water balance;

[0012] The compound surfactant comprises a biosurfactant and an anionic surfactant in a mass ratio of 0.025-0.04:0.125-0.20.

[0013] By adopting the above technical solution, in this application, it is preferred to adopt biosurfactant and anionic surfactant to cooperate as compound surfactant, biosurfactant has good compatibility, can be inserted into the gap between adjacent anionic surfactants, effectively weaken the electrostatic repulsion between the hydrophilic end of anionic surfactant, by the two synergistically increase the adsorption density of the surfactant at the gas-liquid interface, reduce the surface tension of dust suppressant, and improve the foaming ability of foam dust suppressant. At the same time, it is preferred to add thickening binder to dust suppressant, thickening binder can form zipper network structure and high viscoelastic layer, thicken foam liquid film, slow down the coarsening and agglomeration of foam, so as to improve the foaming property of foam. The raw materials selected in this application are all environmentally friendly materials, low irritation and fast degradation rate, effectively improving the environmental protection effect of dust suppressant.

[0014] Optionally, the biosurfactant is selected from any one or more of rhamnolipids, sophorolipids, and alkyl glycosides.

[0015] Optionally, the anionic surfactant is selected from any one or more of dioctyl sulfosuccinate sodium salt, α-olefin sulfonate, and alkyl glyceryl ether sulfonate.

[0016] Optionally, the thickening binder is selected from any one or more of polysaccharide polymers, carbomer, and water-soluble cellulose polymers.

[0017] By adopting the above technical solution, the polysaccharide polymer can spontaneously aggregate to form a zipper network structure after dissolving in water. The carbomer and water-soluble cellulose polymers have higher molecular weights and swell in the solution, opening up their molecular chains. At the same time, the electrostatic repulsion of the surfactant can promote the full extension of the carbomer and water-soluble cellulose polymer molecular chains, which intertwine and cross-link with the network structure of the polysaccharide polymer to form a three-dimensional structure, which can effectively lock in water and significantly increase the viscosity of the foam liquid film. At the same time, some water-soluble polymer molecules can be adsorbed to the air-liquid interface, further increasing the viscoelasticity of the air-liquid interface foam.

[0018] Optionally, the polysaccharide compound is selected from one or more of anionic polysaccharides sodium alginate, xanthan gum, welan gum or carrageenan; the carbomer is selected from one or more of carbomer 940, carbomer 941, carbomer 934, carbomer 980 or carbomer 981; the water-soluble cellulose polymer is selected from any one or more of carboxymethyl cellulose, polyanionic cellulose or hydroxyethyl cellulose.

[0019] Optionally, the wetting agent is selected from any one or more of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium tetrafluoroborate, and 1-butyl-3-methylimidazolium chloride.

[0020] By adopting the above technical solution, under the dissolving effect of the selected wetting agent, the microstructure of the coal dust surface will change, and the number, depth and width of the surface pores and cracks will increase, which will increase the effective contact area between the foam and the coal dust, increase the penetration channels, and help the foam spread and wet on the coal dust surface. The selected wetting agent is adsorbed on the coal dust surface, which can promote the breaking and recombination of the chemical bonds of the functional groups on the coal dust surface, converting a large number of hydrophobic sites into hydrophilic sites, thereby increasing the content of hydrophilic functional groups on the coal dust surface, significantly enhancing the hydrophilicity of the coal dust itself, and thus improving the wetting efficiency. In addition, the carbomer in the selected thickening binder has both hydrophilic and hydrophobic groups, which can be adsorbed on the gas-liquid interface and synergistically promote the wetting of the foam on the coal dust with the wetting agent.

[0021] Optionally, the compound surfactant further comprises a natural polymer surfactant, and the natural polymer surfactant is a starch-polymer alcohol polymer surfactant.

[0022] Optionally, the starch-polymer alcohol polymer surfactant may be a starch-PEG polymer surfactant or a starch-polyvinyl alcohol polymer surfactant.

[0023] By adopting the above technical scheme, starch-PEG high molecular surfactant is preferably added to the compound surfactant. Starch has excellent wetting and bonding effects, can fully wet the dust and improve the dust reduction efficiency. By combining starch with PEG high molecular alcohol, a higher surface activity can be obtained, which effectively improves the wettability and adhesion effect of the dust suppressant.

[0024] It is preferred to add starch-polyvinyl alcohol high molecular surfactant to the compound surfactant. Starch has excellent wetting and bonding effects, can fully wet the dust and improve the dust reduction efficiency. By combining starch with polyvinyl alcohol high molecular alcohol, polyvinyl alcohol can produce hydrogen bonds with water, and the ether oxygen units therein can form an association complex with coal dust, that is, it can improve the capture effect and wetting effect of the foam dust suppressant on coal dust, that is, effectively improve the dust suppression effect of the foam dust suppressant.

[0025] In a second aspect, the present application provides a method for preparing a high-efficiency adhesive wetting foam dust suppressant, which adopts the following technical solution:

[0026] A method for preparing a high-efficiency adhesive wetting foam dust suppressant comprises the following steps:

[0027] S1. Compound surfactant: Mix a biosurfactant and an anionic surfactant with water and stir to obtain a compound surfactant;

[0028] S2. Preparation of dust suppressant: Add thickening binder and wetting agent to the compound surfactant, stir until dissolved, and wait until the foam on the surface of the solution completely disappears to obtain the dust suppressant.

[0029] Optionally, the stirring rate in step S1 is 500-800 rpm; the stirring speed after adding the thickening binder in step S2 is 800-1200 rpm; and the stirring speed after adding the wetting agent is 800-1200 rpm.

[0030] Optionally, after adding the thickening binder, stirring is carried out at 800-1200 rpm at 35-40°C.

[0031] By adopting the above technical solution, after adding the thickening binder, appropriately raising the temperature can effectively improve the dissolution effect of the thickening binder, improve the dispersion uniformity and fusion of each component in the dust suppressant, thereby improving the wettability and adhesion effect of the dust suppressant.

[0032] In summary, this application has the following beneficial effects:

[0033] 1. The foam dust suppressant in this application has good foam adhesion. The selected polysaccharide polymer can spontaneously aggregate to form a zipper network structure after being dissolved in water. Carbomer and carboxymethyl cellulose have high molecular weights, swell in the solution, and the molecular chains open. At the same time, the electrostatic repulsion of the surfactant can promote the full extension of the carbomer and carboxymethyl cellulose molecular chains, which are intertwined and cross-linked with the network structure in the polysaccharide polymer to form a three-dimensional structure, which can effectively lock in water and significantly increase the viscosity of the foam liquid film. At the same time, some water-soluble polymer molecules can be adsorbed to the gas-liquid interface, further increasing the viscoelasticity of the gas-liquid interface.

[0034] 2. The foam dust suppressant in this application has good foam wettability. Under the dissolving action of the selected wetting agent, the microstructure of the coal dust surface will change, and the number, depth and width of the surface pores and cracks will increase, so that the effective contact area between the foam and the coal dust will increase, and the penetration channels will increase, which will help the foam to spread and wet on the surface of the coal dust. The selected wetting agent is adsorbed on the surface of the coal dust, which can promote the breaking and reorganization of the chemical bonds of the functional groups on the surface of the coal dust, and convert a large number of hydrophobic sites into hydrophilic sites, thereby increasing the content of hydrophilic functional groups on the surface of the coal dust, significantly enhancing the hydrophilicity of the coal dust itself, and thus improving the wetting efficiency. In addition, the carbomer in the selected thickening adhesive has both hydrophilic and hydrophobic groups, which can be adsorbed on the gas-liquid interface, and synergistically promote the wetting of the foam on the coal dust with the wetting agent.

[0035] 3. The foam dust suppressant in this application exhibits strong foaming properties. Biosurfactants have good compatibility and can intercalate into the gaps between adjacent anionic surfactants, reducing the electrostatic repulsion between the hydrophilic ends of the anionic surfactants. Through their synergistic effect, the adsorption density of the surfactant at the gas-liquid interface is increased, further reducing surface tension and improving the foaming ability of the foam dust suppressant. Furthermore, the selected thickening binder can form a zipper-like network structure and a highly viscoelastic layer, thickening the foam liquid film and slowing down foam coarsening and agglomeration, thereby improving the foam's foaming properties.

[0036] 4. The foam dust suppressant in this application is environmentally friendly. The raw materials used in this application all have good environmental performance, especially the biosurfactant in the compound surfactant, and the welan gum, carbomer, and carboxymethyl cellulose in the thickening binder, all of which have the characteristics of low irritation and fast degradation.

[0037] 5. The components of the foam dust suppressant in this application have good compatibility, the system is stable, and it is harmless to the human body. In addition, the raw materials are widely available and low in price, so the production and use costs are low. DETAILED DESCRIPTION

[0038] The present application is further described in detail below with reference to the embodiments.

[0039] Preparation Example

[0040] Preparation example of natural polymer surfactant

[0041] Preparation Example 1

[0042] To a 500 mL container equipped with a magnetic stirring oil bath, a thermometer, nitrogen, and a negative pressure device, add 2 g of polymer alcohol (PEG) and 0.03 g of an acidic catalyst. Nitrogen was introduced and the temperature was raised to 100°C. Once the polymer alcohol and the acidic catalyst (p-toluenesulfonic acid) were fully dissolved, 1 g of starch was added in portions. After stirring evenly, the temperature was rapidly raised to 130°C. After reacting for 150 minutes, the temperature was lowered to terminate the reaction, yielding the starch-PEG polymer surfactant.

[0043] Preparation Example 2

[0044] In a 500 mL container equipped with a magnetic stirring oil bath, a thermometer, nitrogen, and a negative pressure device, add 2 g of polyvinyl alcohol (PVA) and 0.03 g of an acidic catalyst. Nitrogen is introduced and the temperature is raised to 100°C. Once the polymer alcohol and the acidic catalyst (p-toluenesulfonic acid) are fully dissolved, 1 g of starch is added in portions. After stirring evenly, the temperature is rapidly raised to 130°C. After reacting for 150 minutes, the temperature is lowered to terminate the reaction, yielding a starch-PVA polymer surfactant. Example Example 1

[0045] On the one hand, the present application provides a high-efficiency adhesive wetting foam dust suppressant, comprising a compound surfactant, a thickening binder, a wetting agent and water, the specific weight percentages of which are shown in Table 1.

[0046] Among them, the compound surfactants include biosurfactants and anionic surfactants.

[0047] The biosurfactant may be selected from any one or more of rhamnolipid, sophorolipid, and alkyl glycoside; specifically, in this embodiment, sophorolipid and decyl glucoside are preferably used as the biosurfactant.

[0048] The anionic surfactant may be selected from any one or more of sodium dioctyl sulfosuccinate, α-olefin sulfonate, and alkyl glyceryl ether sulfonate. Specifically, in this embodiment, sodium α-olefin sulfonate is preferably used as the anionic surfactant.

[0049] Thickening binders include polysaccharide polymers, carbomers, and water-soluble cellulose polymers.

[0050] The polysaccharide polymer may be selected from one or more of anionic polysaccharides such as sodium alginate, xanthan gum, welan gum or carrageenan. Specifically, welan gum is selected as the polysaccharide polymer in this embodiment.

[0051] The carbomer may be one or more of carbomer 940, carbomer 941, carbomer 934, carbomer 980 or carbomer 981; specifically, in this embodiment, the short rheology, high viscosity carbomer 940 is selected.

[0052] The water-soluble cellulose polymer may be any one or more of carboxymethyl cellulose, polyanionic cellulose or hydroxyethyl cellulose; specifically, in this embodiment, carboxymethyl cellulose is selected as the water-soluble cellulose polymer.

[0053] The wetting agent may be any one or more of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium tetrafluoroborate, and 1-butyl-3-methylimidazolium chloride; specifically, in this embodiment, 1-ethyl-3-methylimidazolium tetrafluoroborate is selected as the wetting agent.

[0054] On the other hand, the present application provides a method for preparing a high-efficiency adhesive wetting foam dust suppressant, comprising the following steps:

[0055] S1. Compound surfactant: Add 0.125 g of sophorolipid, 0.125 g of decyl glucoside and 1.25 g of sodium α-olefin sulfonate powder to a container, add 997.3 g of water, and mix at 500-800 rpm for 10 min at 20-50 ° C; fully dissolve the solute in the solution to obtain a compound surfactant;

[0056] S2. Preparation of dust suppressant: add 0.25g of welan gum to the solution, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; add 0.25g of carbomer 940, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; then add 0.1g of carboxymethyl cellulose, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; add 0.6g of wetting agent, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; let it stand for 12h and wait for the foam on the surface of the solution to completely disappear to obtain the said high-efficiency adhesion wetting foam dust suppressant. Example 2

[0057] On the one hand, the present application provides a high-efficiency adhesive wetting foam dust suppressant, comprising a compound surfactant, a thickening binder, a wetting agent and water, the specific weight percentages of which are shown in Table 1.

[0058] Among them, the compound surfactants include biosurfactants and anionic surfactants.

[0059] The biosurfactant may be selected from any one or more of rhamnolipids, sophorolipids, and alkyl glycosides; specifically, in this embodiment, decyl glucoside is preferably used as the biosurfactant.

[0060] The anionic surfactant may be selected from any one or more of sodium dioctyl sulfosuccinate, α-olefin sulfonate, and alkyl glyceryl ether sulfonate. Specifically, in this embodiment, sodium α-olefin sulfonate is preferably used as the anionic surfactant.

[0061] Thickening binders include polysaccharide polymers, carbomers, and water-soluble cellulose polymers.

[0062] The polysaccharide polymer can be selected from one or more of anionic polysaccharides such as sodium alginate, xanthan gum, welan gum or carrageenan. Specifically, xanthan gum is selected as the polysaccharide polymer in this embodiment.

[0063] The carbomer may be one or more of carbomer 940, carbomer 941, carbomer 934, carbomer 980 or carbomer 981; specifically, in this embodiment, the short rheology, high viscosity carbomer 940 is selected.

[0064] The water-soluble cellulose polymer may be any one or more of carboxymethyl cellulose, polyanionic cellulose or hydroxyethyl cellulose; specifically, in this embodiment, carboxymethyl cellulose is selected as the water-soluble cellulose polymer.

[0065] The wetting agent may be any one or more of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium tetrafluoroborate, and 1-butyl-3-methylimidazolium chloride; specifically, in this embodiment, 1-ethyl-3-methylimidazolium tetrafluoroborate is selected as the wetting agent.

[0066] On the other hand, the present application provides a method for preparing a high-efficiency adhesive wetting foam dust suppressant, comprising the following steps:

[0067] S1. Compound surfactant: Add 0.25 g of decyl glucoside and 1.25 g of sodium α-olefin sulfonate powder to a container, add 997.3 g of water, and mix at 500-800 rpm for 10 min at 20-50° C. to fully dissolve the solute in the solution to obtain a compound surfactant.

[0068] S2, dust suppressant preparation: 0.25 g of xanthan gum is added to the solution, and stirred to dissolve at 35°C constant temperature for 1 h at a speed of 800-1200 rpm; 0.25 g of carbomer 940 is added, and stirred to dissolve at 35°C constant temperature for 1 h at a speed of 800-1200 rpm; then 0.1 g of carboxymethyl cellulose is added, and stirred to dissolve at 35°C constant temperature for 1 h at a speed of 800-1200 rpm; 0.6 g of wetting agent is added, and stirred to dissolve at 35°C constant temperature for 1 h at a speed of 800-1200 rpm; and then left to stand for 12 h to wait for the foam on the surface of the solution to completely disappear to obtain the high-efficiency adhesive wetting type foam dust suppressant. Example 3

[0069] In one aspect, the application provides a high-efficiency adhesive wetting type foam dust suppressant, which comprises a compound surfactant, a thickening binder, a wetting agent and water, and the specific weight percentage is shown in Table 1.

[0070] The compound surfactant comprises a biosurfactant and an anionic surfactant.

[0071] The biosurfactant can be selected from any one or more of rhamnolipid, sophorolipid and alkyl glycoside; specifically, sophorolipid and decyl glucoside are preferably used as the biosurfactant in the embodiment.

[0072] The anionic surfactant can be selected from any one or more of sodium dioctyl sulfosuccinate, alpha-alkenyl sulfonate and alkyl glyceryl ether sulfonate; specifically, sodium dioctyl sulfosuccinate is preferably used as the anionic surfactant in the embodiment.

[0073] The thickening binder comprises a polysaccharide polymer, carbomer and water-soluble cellulose macromolecule.

[0074] The polysaccharide polymer can be selected from one or more of anionic polysaccharide sodium alginate, xanthan gum, welan gum or carrageenan; specifically, welan gum is selected as the polysaccharide polymer in the embodiment.

[0075] The carbomer can be selected from one or more of carbomer 940, carbomer 941, carbomer 934, carbomer 980 or carbomer 981; specifically, carbomer 940 with short rheological property and high viscosity is selected in the embodiment.

[0076] The water-soluble cellulose macromolecule can be selected from any one or more of carboxymethyl cellulose, polyanionic cellulose or hydroxyethyl cellulose; specifically, carboxymethyl cellulose is selected as the water-soluble cellulose macromolecule in the embodiment.

[0077] The wetting agent can be any one or more of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium tetrafluoroborate, and 1-butyl-3-methylimidazolium chloride; specifically, 1-ethyl-3-methylimidazolium tetrafluoroborate is selected as the wetting agent in this embodiment.

[0078] In another aspect, the application provides a preparation method of the high-efficiency adhesive wetting type foam dust suppressant, comprising the following steps:

[0079] S1, compounding the surfactant: adding 0.2 g of sophorose lipid, 0.2 g of decyl glucoside, and 2 g of sulfonated succinic acid dioctyl ester sodium salt powder in a container, adding 994.1 g of water, and mixing at a speed of 500-800 rpm for 10 min at 20-50°C; the solute in the solution is fully dissolved to obtain the compounded surfactant;

[0080] S2, preparing the dust suppressant: adding 0.7 g of welan gum to the solution, stirring and dissolving at a speed of 800-1200 rpm for 1 h at 35°C; adding 0.6 g of carbomer 940, stirring and dissolving at a speed of 800-1200 rpm for 1 h at 35°C; then adding 0.7 g of carboxymethyl cellulose, stirring and dissolving at a speed of 800-1200 rpm for 1 h at 35°C; adding 1.5 g of the wetting agent, stirring and dissolving at a speed of 800-1200 rpm for 1 h at 35°C; and standing for 12 h to wait for the foam on the surface of the solution to completely disappear to obtain the high-efficiency adhesive wetting type foam dust suppressant. Embodiment 4

[0081] In one aspect, the application provides a high-efficiency adhesive wetting type foam dust suppressant, which comprises a compounded surfactant, a thickening binder, a wetting agent, and water, and the specific weight percentage is shown in Table 1.

[0082] The compounded surfactant comprises a biological surfactant, an anionic surfactant, and a natural high-molecular surfactant.

[0083] The biological surfactant can be any one or more of rhamnolipid, sophorose lipid, and alkyl glycoside; specifically, sophorose lipid and decyl glucoside are preferably used as the biological surfactant in this embodiment.

[0084] The anionic surfactant can be any one or more of sulfonated succinic acid dioctyl ester sodium salt, α-alkenyl sulfonate, and alkyl glyceryl ether sulfonate; specifically, α-alkenyl sulfonate sodium is preferably used as the anionic surfactant in this embodiment.

[0085] The natural polymer surfactant can be selected from starch-PEG polymer surfactant or starch-polyvinyl alcohol polymer surfactant. Specifically, in this embodiment, the starch-PEG polymer surfactant prepared in Preparation Example 1 is preferably used as the natural polymer surfactant.

[0086] Thickening binders include polysaccharide polymers, carbomers, and water-soluble cellulose polymers.

[0087] The polysaccharide polymer may be selected from one or more of anionic polysaccharides such as sodium alginate, xanthan gum, welan gum or carrageenan. Specifically, welan gum is selected as the polysaccharide polymer in this embodiment.

[0088] The carbomer may be one or more of carbomer 940, carbomer 941, carbomer 934, carbomer 980 or carbomer 981; specifically, in this embodiment, the short rheology, high viscosity carbomer 940 is selected.

[0089] The water-soluble cellulose polymer may be any one or more of carboxymethyl cellulose, polyanionic cellulose or hydroxyethyl cellulose; specifically, in this embodiment, carboxymethyl cellulose is selected as the water-soluble cellulose polymer.

[0090] The wetting agent may be any one or more of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium tetrafluoroborate, and 1-butyl-3-methylimidazolium chloride; specifically, in this embodiment, 1-ethyl-3-methylimidazolium tetrafluoroborate is selected as the wetting agent.

[0091] On the other hand, the present application provides a method for preparing a high-efficiency adhesive wetting foam dust suppressant, comprising the following steps:

[0092] S1. Compound surfactant: Add 0.1 g of sophorolipid, 0.1 g of decyl glucoside, 1 g of sodium α-olefin sulfonate powder and 0.3 g of starch-PEG polymer surfactant to a container, add 997.3 g of water, and mix at 20-50 ° C and 500-800 rpm for 10 minutes to fully dissolve the solute in the solution to obtain a compound surfactant;

[0093] S2. Preparation of dust suppressant: add 0.25g of welan gum to the solution, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; add 0.25g of carbomer 940, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; then add 0.1g of carboxymethyl cellulose, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; add 0.6g of wetting agent, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; let it stand for 12h and wait for the foam on the surface of the solution to completely disappear to obtain the said high-efficiency adhesion wetting foam dust suppressant. Example 5

[0094] On the one hand, the present application provides a high-efficiency adhesive wetting foam dust suppressant, comprising a compound surfactant, a thickening binder, a wetting agent and water, the specific weight percentages of which are shown in Table 1.

[0095] Among them, compound surfactants include biosurfactants, anionic surfactants and natural polymer surfactants.

[0096] The biosurfactant may be selected from any one or more of rhamnolipid, sophorolipid, and alkyl glycoside; specifically, in this embodiment, sophorolipid and decyl glucoside are preferably used as the biosurfactant.

[0097] The anionic surfactant may be selected from any one or more of sodium dioctyl sulfosuccinate, α-olefin sulfonate, and alkyl glyceryl ether sulfonate. Specifically, in this embodiment, sodium α-olefin sulfonate is preferably used as the anionic surfactant.

[0098] The natural polymer surfactant can be selected from starch-PEG polymer surfactant or starch-polyvinyl alcohol polymer surfactant. Specifically, in this embodiment, the starch-polyvinyl alcohol polymer surfactant prepared in Preparation Example 1 is preferably used as the natural polymer surfactant.

[0099] Thickening binders include polysaccharide polymers, carbomers, and water-soluble cellulose polymers.

[0100] The polysaccharide polymer may be selected from one or more of anionic polysaccharides such as sodium alginate, xanthan gum, welan gum or carrageenan. Specifically, welan gum is selected as the polysaccharide polymer in this embodiment.

[0101] The carbomer may be one or more of carbomer 940, carbomer 941, carbomer 934, carbomer 980 or carbomer 981; specifically, in this embodiment, the short rheology, high viscosity carbomer 940 is selected.

[0102] The water-soluble cellulose polymer may be any one or more of carboxymethyl cellulose, polyanionic cellulose or hydroxyethyl cellulose; specifically, in this embodiment, carboxymethyl cellulose is selected as the water-soluble cellulose polymer.

[0103] The wetting agent may be any one or more of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium tetrafluoroborate, and 1-butyl-3-methylimidazolium chloride; specifically, in this embodiment, 1-ethyl-3-methylimidazolium tetrafluoroborate is selected as the wetting agent.

[0104] On the other hand, the present application provides a method for preparing a high-efficiency adhesive wetting foam dust suppressant, comprising the following steps:

[0105] S1. Compound surfactant: Add 0.1 g of sophorolipid, 0.1 g of decyl glucoside, 1 g of sodium α-olefin sulfonate powder and 0.3 g of starch-polyvinyl alcohol polymer surfactant to a container, add 997.3 g of water, and mix at 500-800 rpm for 10 min at 20-50 ° C; fully dissolve the solute in the solution to obtain a compound surfactant;

[0106] S2. Preparation of dust suppressant: add 0.25g of welan gum to the solution, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; add 0.25g of carbomer 940, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; then add 0.1g of carboxymethyl cellulose, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; add 0.6g of wetting agent, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200rpm for 1h; let it stand for 12h and wait for the foam on the surface of the solution to completely disappear to obtain the said high-efficiency adhesion wetting foam dust suppressant.

[0107] Table 1 Composition of Examples 1-5 and Comparative Examples 1-2

[0108] Comparative Example

[0109] Comparative Example 1

[0110] On the one hand, the present application provides a high-efficiency adhesive wetting foam dust suppressant, comprising a compound surfactant, a wetting agent and water, the specific weight percentages of which are shown in Table 1.

[0111] Among them, the compound surfactants include biosurfactants and anionic surfactants.

[0112] The biosurfactant may be any one or more of rhamnolipid, sophorolipid, and alkyl glycoside; specifically, sophorolipid and decyl glucoside are preferably used as the biosurfactant in this comparative example.

[0113] The anionic surfactant can be selected from any one or more of dioctyl sulfonate succinate, α-olefin sulfonate, and alkyl glyceryl ether sulfonate; specifically, dioctyl sulfonate succinate is preferably used as the anionic surfactant in this comparative example.

[0114] The wetting agent can be selected from any one or more of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium tetrafluoroborate, and 1-butyl-3-methylimidazolium chloride; specifically, 1-ethyl-3-methylimidazolium tetrafluoroborate is selected as the wetting agent in this comparative example.

[0115] On the other hand, the present application provides a method for preparing a high-efficiency adhesive wetting foam dust suppressant, comprising the following steps:

[0116] S1. Compound surfactant: Add 0.15 g of sophorolipid, 0.15 g of decyl glucoside and 1.5 g of sodium α-olefin sulfonate powder to a container, add 997.2 g of water, and mix at 500-800 rpm for 10 min at 20-50 ° C to fully dissolve the solute in the solution to obtain a compound surfactant;

[0117] S2. Preparation of dust suppressant: add 1 g of wetting agent to the solution, stir and dissolve at a constant temperature of 35°C and a speed of 800-1200 rpm for 1 h; let it stand for 12 h and wait for the foam on the surface of the solution to completely disappear to obtain the dust suppressant.

[0118] Comparative Example 2

[0119] On the one hand, the present application provides a high-efficiency adhesive wetting foam dust suppressant, comprising a compound surfactant, a thickening binder and water, the specific weight percentages of which are shown in Table 1.

[0120] Among them, the compound surfactants include biosurfactants and anionic surfactants.

[0121] The biosurfactant may be any one or more of rhamnolipid, sophorolipid, and alkyl glycoside; specifically, sophorolipid and decyl glucoside are preferably used as the biosurfactant in this comparative example.

[0122] The anionic surfactant can be selected from any one or more of sodium dioctyl sulfosuccinate, α-olefin sulfonate, and alkyl glyceryl ether sulfonate; specifically, sodium α-olefin sulfonate is preferably used as the anionic surfactant in this comparative example.

[0123] Thickening binders include polysaccharide polymers, carbomers, and water-soluble cellulose polymers.

[0124] The polysaccharide polymer can be selected from one or more of anionic polysaccharides such as sodium alginate, xanthan gum, welan gum or carrageenan; specifically, welan gum is selected as the polysaccharide polymer in this comparative example.

[0125] The carbomer may be one or more of carbomer 940, carbomer 941, carbomer 934, carbomer 980 or carbomer 981; specifically, in this comparative example, carbomer 940 with short rheology and high viscosity is selected.

[0126] The water-soluble cellulose polymer can be selected from any one or more of carboxymethyl cellulose, polyanionic cellulose or hydroxyethyl cellulose; specifically, carboxymethyl cellulose is selected as the water-soluble cellulose polymer in this comparative example.

[0127] On the other hand, the present application provides a method for preparing a high-efficiency adhesive wetting foam dust suppressant, comprising the following steps:

[0128] S1. Compound surfactant: Add 0.15 g of sophorolipid, 0.15 g of decyl glucoside and 1.5 g of sodium α-olefin sulfonate powder to a container, add 996.9 g of water, and mix at 500-800 rpm for 10 min at 20-50 ° C to fully dissolve the solute in the solution to obtain a compound surfactant;

[0129] S2. Preparation of dust suppressant: add 0.5 g of welan gum to the solution, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200 rpm for 1 h; add 0.3 g of carbomer 940, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200 rpm for 1 h; then add 0.5 g of carboxymethyl cellulose, stir and dissolve at a constant temperature of 35°C at a speed of 800-1200 rpm for 1 h; let it stand for 12 h and wait for the foam on the surface of the solution to completely disappear to obtain the dust suppressant.

[0130] Performance testing

[0131] The dust suppressants prepared in the examples and comparative examples were diluted 100 times and injected into the foaming device for testing. The test results are shown in Table 2:

[0132] Table 2 Performance test

[0133] Foam volume (mL) Foam viscosity (mPa·s) Wetting rate (mg / s) Example 1 738 4512 4.31 Example 2 743 4699 4.33 Example 3 750 4855 4.25 Example 4 742 4462 4.37 Example 5 748 4582 4.41 Comparative Example 1 712 3250 3.08 Comparative Example 2 718 4011 1.44

[0134] Combining the performance test comparison in Table 2, we can find that:

[0135] As shown in Table 2, the high-efficiency adhesive wetting foam dust suppressant proposed by the present invention has significant advantages. As can be seen from the data of the examples and comparative examples, the addition of a thickening binder increases the viscosity of the foam; the addition of a wetting agent improves the wetting properties of the foam on coal dust. A starch-polyvinyl alcohol polymer surfactant is added to the compound surfactant. Starch has excellent wetting and bonding effects, can fully wet dust and improve dust reduction efficiency. By combining starch with polyvinyl alcohol polymer, polyvinyl alcohol can generate hydrogen bonds with water, and the ether oxygen units therein can form an association complex with coal dust. In other words, the capture and wetting effects of the foam dust suppressant on coal dust can be improved, effectively improving the dust suppression effect of the foam dust suppressant.

[0136] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A high-efficiency adhesive wetting foam dust suppressant, characterized in that: The raw materials include the following weight percentages: Compound surfactant 0.15-0.24%; Thickening adhesive 0.06-0.2%; Wetting agent 0.06-0.15%; Water balance; The compound surfactant comprises a biosurfactant and an anionic surfactant in a mass ratio of 0.025-0.04:0.125-0.20; The biosurfactant is selected from any one or more of rhamnolipids, sophorolipids, and alkyl glycosides; The anionic surfactant is selected from any one or more of dioctyl sulfosuccinate sodium salt, α-olefin sulfonate, and alkyl glyceryl ether sulfonate; The thickening binder is a polysaccharide polymer, carbomer and water-soluble cellulose polymer; The wetting agent is selected from any one or more of 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium tetrafluoroborate, and 1-butyl-3-methylimidazolium chloride.

2. The high-efficiency adhesive wetting foam dust suppressant according to claim 1, characterized in that: The polysaccharide polymer is selected from one or more of anionic polysaccharides sodium alginate, xanthan gum, welan gum or carrageenan; the carbomer is selected from one or more of carbomer 940, carbomer 941, carbomer 934, carbomer 980 or carbomer 981; the water-soluble cellulose polymer is selected from any one or more of carboxymethyl cellulose, polyanionic cellulose or hydroxyethyl cellulose.

3. The high-efficiency adhesive wetting foam dust suppressant according to claim 1, characterized in that: The compound surfactant also includes a natural high molecular surfactant, and the natural high molecular surfactant is a starch-high molecular alcohol high molecular surfactant.

4. The high-efficiency adhesive wetting foam dust suppressant according to claim 3, characterized in that: The starch-polymer alcohol polymer surfactant is selected from starch-PEG polymer surfactant or starch-polyvinyl alcohol polymer surfactant.

5. The method for preparing a high-efficiency adhesive wetting foam dust suppressant according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1. Compound surfactant: Mix a biosurfactant and an anionic surfactant with water and stir to obtain a compound surfactant; S2. Preparation of dust suppressant: Add thickening binder and wetting agent to the compound surfactant, stir until dissolved, and wait until the foam on the surface of the solution completely disappears to obtain the dust suppressant.

6. The method for preparing a high-efficiency adhesive wetting foam dust suppressant according to claim 5, characterized in that: The stirring rate in step S1 is 500-800 rpm; the stirring speed after adding the thickening binder in step S2 is 800-1200 rpm; and the stirring speed after adding the wetting agent is 800-1200 rpm.

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