Liquid dust suppressant, preparation method thereof and dissolver

Abstract

The invention provides a liquid dust suppressant, a preparation method thereof and a dissolver, and belongs to the technical field of dust suppressants. According to the preparation method, firstly, the adhesive is mixed with the polyhydric alcohol, so that subsequent dissolution is facilitated; the machine oil is emulsified by the emulsifier, and hydrogen bonds, Van der Waals' force and the like are generated when hydrophilic / oleophylic groups carried on the surface of the emulsifier are mixed with the machine oil and the dispersed adhesive, so that all the raw materials can be fully mixed, an obvious separation phenomenon is not generated, the flowing property is improved, and meanwhile, due to the use of the emulsifier, the mechanical oil can be fully dispersed. The wetting angle of the raw materials is reduced, the wetting performance and the hydrophilic performance are greatly improved, a good foundation is laid for high solubility, high stability and the like of a subsequently prepared aqueous solution, and the oil-water separation phenomenon is avoided; the film-forming agent is added, a uniform and high-strength film-like system is formed by utilizing high cohesiveness, high swelling property and low solubility of the film-forming agent, and the compressive strength of the film is improved after the film-forming agent is mixed with water and sprayed.

Description

Technical Field

[0001] The invention belongs to the technical field of dust suppressants, and in particular relates to a liquid dust suppressant and a preparation method thereof, and a dissolver. Background Art

[0002] During the transportation of coal, dust is easily generated. This dust mainly includes inhalable particles, which cause air pollution. After being inhaled by the human body, it will penetrate deep into the respiratory tract and lungs, causing health problems such as respiratory diseases and cardiovascular diseases. Spraying dust suppressants can reduce dust and avoid harm to the human body and the air.

[0003] The solutes of existing dust suppressants are mainly cellulose, soluble starch or soluble film-forming substances, which are then directly mixed with organic solvents to form liquid dust suppressants. However, existing dust suppressants are not easy to dissolve, and their viscosity is not high, usually only around 5mpa.s, and no liquid dust suppressants with a viscosity greater than 15mpa.s have been seen, resulting in low compressive strength of the film after the dust suppressant is mixed with water and sprayed, making its dust suppression effect relatively general; at the same time, the existing dust suppressant dissolution device is generally a stirring tank, and the dust suppressant takes a long time to dissolve and has a poor dissolution effect.

[0004] Therefore, how to improve the solubility of dust suppressants and the compressive strength of the film after they are mixed with water and sprayed has become a difficult problem in the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a liquid dust suppressant and a preparation method thereof and a dissolver. The dust suppressant prepared by the preparation method provided by the present invention is easy to dissolve, and the compressive strength of the film after being mixed with water and sprayed is relatively high.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] The present invention provides a method for preparing a liquid dust suppressant, comprising the following steps:

[0008] (1) mixing an adhesive and a polyol to obtain a mixed solution;

[0009] (2) mixing the machine oil with an emulsifier and emulsifying the mixture to obtain an emulsion;

[0010] (3) mixing the emulsion obtained in step (2) with the mixed solution, auxiliary materials and film-forming agent obtained in step (1) to obtain a liquid dust suppressant;

[0011] There is no chronological order for steps (1) and (2).

[0012] Preferably, the adhesive in step (1) comprises one or more of xanthan gum, sodium polyacrylate, carboxymethyl cellulose and hydroxyguar gum.

[0013] Preferably, the polyol in step (1) comprises one or more of ethanol aqueous solution, glycerol, pentaerythritol, polyvinyl alcohol and sorbitol.

[0014] Preferably, in step (1), the mass ratio of the adhesive to the polyol is (1-6):1.

[0015] Preferably, the machinery oil in step (2) comprises one or more of white oil, mineral oil, diesel and base oil.

[0016] Preferably, the emulsifier in step (2) comprises one or more of stearic acid, glyceryl monostearate, sodium dodecylbenzene sulfonate, sodium petroleum acid sulfonate, S-80 emulsifier and white oil emulsifier.

[0017] Preferably, in step (2), the mass ratio of the machine oil to the emulsifier is (9-15):1.

[0018] Preferably, in step (3), the mass ratio of the emulsion, the mixed solution, the auxiliary material and the film-forming agent is (200-550): (100-600): (100-150): (50-90).

[0019] The present invention also provides a liquid dust suppressant prepared by the preparation method described in the above technical solution.

[0020] The present invention also provides a dissolver for dissolving the liquid dust suppressant described in the above technical solution, comprising a mixing box, a homogenizing pump, a pulping machine, a shearing mixer, a liquid storage tank, a sensor and a PLC control system.

[0021] The present invention provides a method for preparing a liquid dust suppressant, comprising the following steps: (1) mixing an adhesive with a polyol to obtain a mixed liquid; (2) mixing a machine oil with an emulsifier, emulsifying the mixture, and obtaining an emulsion; (3) mixing the emulsion obtained in step (2) with the mixed liquid obtained in step (1), auxiliary materials, and a film-forming agent to obtain a liquid dust suppressant; steps (1) and (2) are not performed in any chronological order. The invention firstly mixes the adhesive with the polyol, which has a large number of hydrogen bonds and hydroxyl groups and can easily enter the gaps between macromolecules and polymers and fill them, so that the macromolecules are dissolved by small molecules to form a dispersed system. Meanwhile, the polyol has good fluidity at room temperature. Under the action of hydrogen bonds, the fluidity of the adhesive molecules is significantly improved after dispersion, which is conducive to subsequent dissolution. The machine oil is emulsified with an emulsifier, and the hydrophilic / lipophilic groups on the surface of the emulsifier generate hydrogen bonds, van der Waals forces, etc. when mixed with the machine oil and the dispersed adhesive, so that the raw materials can be fully mixed without obvious separation, and the fluidity is improved. Meanwhile, due to the use of the emulsifier, the wetting angle of the raw materials is reduced, and the wetting performance and hydrophilic performance are greatly improved, which lays a good foundation for the high solubility and high stability of the subsequent aqueous solution, and the oil-water separation phenomenon does not occur. The film-forming agent is added, and the high adhesion, high swelling and low solubility of the film-forming agent are used to form a uniform and high-strength film-like system, and the compressive strength of the film is improved after being mixed with water and sprayed. The results of the examples show that after the dust suppressant prepared by the present invention is mixed with water and sprayed, the compressive strength of the film is 250g / cm 2 Above, the highest can reach 1050g / cm 2 . BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the planar structure of the dissolver provided by the present invention;

[0023] Figure 2 A macroscopic view of the dissolver provided by the present invention. DETAILED DESCRIPTION

[0024] The present invention provides a method for preparing a liquid dust suppressant, comprising the following steps:

[0025] (1) mixing an adhesive and a polyol to obtain a mixed solution;

[0026] (2) mixing the machine oil with an emulsifier and emulsifying the mixture to obtain an emulsion;

[0027] (3) mixing the emulsion obtained in step (2) with the mixed solution, auxiliary materials and film-forming agent obtained in step (1) to obtain a liquid dust suppressant;

[0028] There is no chronological order for steps (1) and (2).

[0029] Unless otherwise specified, the present invention has no particular limitation on the sources of the raw materials, and commercially available products known to those skilled in the art may be used.

[0030] The present invention mixes the adhesive with the polyol to obtain a mixed liquid.

[0031] In the present invention, the adhesive preferably includes one or more of xanthan gum, sodium polyacrylate, carboxymethyl cellulose and hydroxyguar gum. In the present invention, the xanthan gum is preferably food grade xanthan gum; the number average molecular weight of the sodium polyacrylate is preferably 10000 to 30000, more preferably 20000; the degree of substitution of the carboxymethyl cellulose is preferably ≥0.90DS; the viscosity of the carboxymethyl cellulose is preferably ≥1500mpa.s.

[0032] In the present invention, the polyol preferably includes one or more of ethanol aqueous solution, glycerol, pentaerythritol, polyvinyl alcohol and sorbitol.

[0033] In the present invention, the volume concentration of the ethanol aqueous solution is preferably 90-96%, more preferably 95%.

[0034] In the present invention, the mass ratio of the adhesive to the polyol is preferably (1-6):1. As an embodiment, the mass ratio of the adhesive to the polyol may be (2-5):1, or may be (3-4):1. In the present invention, the polyol has a large number of hydrogen bonds and hydroxyl groups, and can easily enter the gaps between macromolecules and polymers and fill them, so that small molecules dissolve macromolecules to form a dispersed system. At the same time, the polyol has good fluidity at room temperature. Under the action of hydrogen bonds, the fluidity of the adhesive molecules is significantly improved after dispersion, which is beneficial to subsequent dissolution. The present invention controls the mass ratio of the adhesive to the polyol within the above range, which can be more beneficial to the subsequent dissolution of the dust suppressant.

[0035] In the present invention, the mixing speed is preferably 1000-1300 rpm; the mixing time is preferably 10-30 min, more preferably 20-30 min; the mixing is preferably carried out in a mixing and stirring kettle. The present invention controls the mixing speed and time within the above ranges, so that the two can be mixed more fully.

[0036] The invention mixes the machine oil with the emulsifier, performs emulsification, and obtains the emulsion.

[0037] In the present invention, the machine oil preferably includes one or more of white oil, mineral oil, diesel and base oil.

[0038] In the present invention, the white oil is preferably 10# white oil; the mineral oil is preferably u-30°C transformer oil; and the diesel is preferably -10# diesel.

[0039] In the present invention, the emulsifier preferably includes one or more of stearic acid, glyceryl monostearate, sodium dodecylbenzene sulfonate, sodium petroleum acid sulfonate, S-80 emulsifier and white oil emulsifier.

[0040] In the present invention, the mass ratio of the machine oil and the emulsifier is preferably (9-15):1. As an embodiment, the mass ratio of the machine oil and the emulsifier can be (10-14):1, or (11-13):1. The present invention emulsifies the machine oil with an emulsifier. When the hydrophilic / lipophilic groups on the surface of the emulsifier are mixed with the machine oil and the dispersed adhesive, hydrogen bonds, van der Waals forces, etc. are generated, so that the raw materials can be fully mixed without obvious separation, and the flow properties are improved. At the same time, due to the use of the emulsifier, the wetting angle of the raw materials is reduced, and the wetting properties and hydrophilic properties are greatly improved, which lays a good foundation for the high solubility and high stability of the subsequent aqueous solution, and no oil-water separation occurs. The present invention controls the mass ratio of the machine oil and the emulsifier within the above range, which can be more conducive to the dissolution of the subsequent dust suppressant.

[0041] In the present invention, the emulsification rate is preferably 100-2000 rpm; the emulsification time is preferably 10-30 min, more preferably 20-30 min; the emulsification is preferably carried out in a shear stirring kettle. The present invention limits the emulsification rate and time within the above ranges, which can make the emulsification more complete.

[0042] After obtaining the mixed liquid and the emulsion, the present invention mixes the emulsion with the mixed liquid, auxiliary materials and a film-forming agent to obtain a liquid dust suppressant.

[0043] In the present invention, the auxiliary material preferably includes one or more of water-soluble starch and maltodextrin, and more preferably maltodextrin. In the present invention, the maltodextrin is preferably food-grade maltodextrin. The auxiliary material is added to increase the viscosity, enhance the dispersibility and solubility of the product, and maltodextrin has good emulsification and thickening effects.

[0044] In the present invention, the film-forming agent is preferably seaweed powder. In the present invention, the film-forming agent is used as a dust suppressant film-forming compression enhancer, and forms a uniform, high-strength film system by utilizing its high adhesion, high swelling and low solubility, and improves the compressive strength of the film after being mixed with water and sprayed.

[0045] In the present invention, the mass ratio of the emulsion, the mixed solution, the auxiliary material and the film-forming agent is preferably (200-550): (100-600): (100-150): (50-90). The present invention controls the mass ratio of each raw material within the above range, which can further improve the solubility of the dust suppressant and the compressive strength of the film after spraying.

[0046] In the present invention, silicon dioxide and organic bentonite are preferably added during the mixing.

[0047] In the present invention, the particle size of the silicon dioxide is preferably 20-200 mesh. In the present invention, the mass ratio of the emulsion to the silicon dioxide is preferably (205-420):(8-10). The silicon dioxide added in the present invention supports the film formed subsequently and acts as a skeleton, thereby improving the compressive strength.

[0048] In the present invention, the particle size of the organic bentonite is preferably 20 to 200 meshes. In the present invention, the mass ratio of the silicon dioxide to the organic bentonite is preferably 1: (0.5 to 1.5), more preferably 1: 1. The organic bentonite in the present invention has water swelling, adhesion, adsorption, lubricity, catalytic activity, thixotropy, plasticity and cation exchange properties, etc., forming an interlayer structure, which has water swelling on the one hand, and the interlayer structure also has a certain supporting effect.

[0049] In the present invention, the emulsion is preferably mixed with the mixed solution, the auxiliary material and the film-forming agent by stirring the emulsion and the mixed solution at 1000-1300 rpm for 10-20 min, then adding the auxiliary material and the film-forming agent, and stirring at 350-500 rpm for 20-30 min. The mixing method of the present invention can make the raw materials more evenly mixed.

[0050] In the present invention, when adding silicon dioxide and organic bentonite, the emulsion is preferably mixed with silicon dioxide, organic bentonite, the mixed solution, auxiliary materials and film-forming agent in the following manner: the emulsion is stirred with silicon dioxide and organic bentonite at 1000-1300 rpm for 10-20 min, then the mixed solution is added, stirred at 1000-1300 rpm for 10-20 min, then the auxiliary materials and film-forming agent are added, and stirred at 350-500 rpm for 20-30 min. The mixing method of the present invention can make the raw materials mixed more uniformly.

[0051] The invention controls the raw materials, preparation method and various process parameters of the dust suppressant, improves the solubility of the dust suppressant, and improves the compressive strength of the film after the dust suppressant is mixed with water and sprayed.

[0052] The present invention also provides a liquid dust suppressant prepared by the preparation method described in the above technical solution.

[0053] The liquid dust suppressant prepared by the invention is more soluble, and has higher compressive strength of the film after being mixed with water and sprayed.

[0054] The present invention also provides a dissolver for dissolving the liquid dust suppressant described in the above technical solution, comprising a mixing box, a homogenizing pump, a pulping machine, a shearing mixer, a liquid storage tank, a sensor and a PLC control system.

[0055] In the present invention, when the liquid dust suppressant is used, it is preferred that the liquid dust suppressant is mixed with water and then sprayed.

[0056] In the present invention, the liquid dust suppressant can be used in a conventional dissolver or in the dissolver provided by the present invention. The dissolver provided by the present invention can shorten the dissolution time of the liquid dust suppressant.

[0057] The dissolver provided by the present invention comprises a mixing box. In the present invention, the liquid dust suppressant is mixed with water in the mixing box.

[0058] In the present invention, the mass ratio of the liquid dust suppressant to water is preferably 1:(180-220), more preferably 1:(200-220). The present invention controls the mass ratio of the liquid dust suppressant to water within the above range, which can make the liquid dust suppressant more soluble, and the mixed system has a higher viscosity, thereby improving the compressive strength of the film after spraying.

[0059] In the present invention, the mixing box preferably comprises a high-speed stirrer; the stirring rate of the high-speed stirrer is preferably 2000 to 5000 rpm; and the stirring time of the high-speed stirrer is preferably 15 to 30 min.

[0060] The present invention has no special limitation on the size, material, etc. of the mixing box, which can be selected according to the actual needs of those skilled in the art. In an embodiment of the present invention, the mixing box is a cylindrical mixing box; the diameter of the mixing box is 0.4 m and the height is 0.4 m.

[0061] The dissolver provided by the present invention also includes a homogenizing pump. In the present invention, the homogenizing pump is installed under the mixing box and is connected to the mixing box. In the present invention, the liquid dust suppressant and water are mixed and dissolved in the mixing box and then enter the homogenizing pump for further dissolution and homogenization. In the present invention, the motor power of the homogenizing pump is preferably 5 to 6 kw, more preferably 5.5 kw. In an embodiment of the present invention, the homogenizing pump is from Shanghai Yiken Machinery Equipment Co., Ltd., model ERS2000.

[0062] The dissolver provided by the present invention also includes a pulping machine. In the present invention, the pulping machine is connected to a homogenizing pump. In the present invention, the dust suppressant and water are further ground and dissolved by the pulping machine. In the present invention, the motor power of the pulping machine is preferably 10 to 20 kw, more preferably 15 kw. In an embodiment of the present invention, the pulping machine is from Hunan Zhengda Jingyan Manufacturing Co., Ltd., model: SBG 350.

[0063] The dissolver provided by the present invention also includes a shearing mixer. In the present invention, the shearing mixer is connected to the refiner. In the present invention, the dust suppressant and water are further sheared, dissolved and mixed by the shearing mixer. In the present invention, the motor power of the shearing mixer is preferably 5 to 15 kW, more preferably 10 kW; the rotation speed of the shearing mixer is preferably 1000 to 3000 rpm, more preferably 2000 rpm. The present invention controls the power and rotation speed of the shearing mixer within the above range, which is more conducive to the mixing and dissolution of the dust suppressant and water.

[0064] The dissolver provided by the present invention also includes a liquid storage tank. In the present invention, the liquid storage tank is connected to the shear mixer. The present invention stores the mixed and dissolved dust suppressant aqueous solution in the liquid storage tank to facilitate subsequent spraying. In the present invention, the liquid storage tank also preferably includes a high and low position controller. When the liquid storage tank is lower than 1m 3 The system automatically turns on the system when the tank is higher than 1.05m 3 The system automatically shuts down when the system is turned off. The present invention has no special restrictions on the material and size of the liquid storage tank, which can be selected according to actual needs. In the embodiment of the present invention, the liquid storage tank is a rectangular liquid storage tank; the length, width and height of the liquid storage tank are 1m respectively; the volume of the liquid storage tank is 1m 3 .

[0065] The dissolver provided by the present invention also includes a sensor. In the present invention, the sensor preferably includes a viscosity sensor, a concentration sensor, a density sensor, a flow sensor and a pH sensor. In the present invention, the sensor is located inside the liquid storage tank. The present invention uses a sensor to measure the viscosity, concentration, density, flow and pH value of a mixed solution obtained by mixing a dust suppressant with water. The present invention has no special limitation on the position of the sensor, which can be selected according to actual needs. In an embodiment of the present invention, the sensor adopts a Siemens S7-200SMART series sensor, which has high reliability and fast operation speed and is suitable for harsh outdoor environments.

[0066] The dissolver provided by the present invention also includes a PLC control system, preferably a PLC electric control system. The present invention transmits the sensor signal to the PLC through the I / O module in the PLC control system, which is processed by the CPU, and the processed result is converted into a control signal, which is sent to the actuator by the output module, and the actuator operates the controlled object, including the start and stop of the homogenizing pump, the opening of the valve, and other actions.

[0067] The dissolver provided by the present invention preferably further comprises valves. The present invention has no special limitation on the number and position of the valves, which can be selected according to actual needs.

[0068] The dissolver of the present invention uses a homogenizing pump, a pulping machine, and a shearing mixer to dissolve the material. The high tangential speed and high-frequency mechanical effect generated by the high-speed rotation of the shearing machine bring about strong kinetic energy, so that the material is subjected to strong mechanical and hydraulic shearing, centrifugal extrusion, liquid layer friction, impact tearing and turbulent flow in the narrow gap between the stator and the rotor, so that the raw material can be dissolved in a short time, and the dust suppressant can be used, dissolved and sprayed immediately, and the dust suppressant has a small size, low cost, and is economical and practical. When the dissolver provided by the present invention is used, the dissolution time of the liquid dust suppressant is 10 to 15 minutes, while when the existing dissolver is used, the dissolution time of the liquid dust suppressant is more than 40 minutes.

[0069] The present invention adopts combined dissolution, which changes the disadvantage of the existing dust suppressant that it relies on mechanical natural dissolution. It integrates dissolution, spraying, detection and metering, can realize rapid preparation and use of liquid, solves the problem of difficulty in dissolving dust suppressants, realizes immediate dissolution and spraying, is convenient to use and simple to operate, reduces labor intensity, simplifies the operation process, changes manual quality detection into automatic recognition by sensors, and monitors liquid indicators in real time online. There is no need for advance stirring and storage, anti-corrosion in summer, and heat preservation and corrosion problems in winter.

[0070] The schematic diagram of the planar structure of the dissolver provided by the present invention is as follows Figure 1 As shown, 1 is a homogenizing pump, 2 is a pulping machine, 3 is a water inlet, 4 is a water inlet, 5 is a base, 6 is a storage tank, 7 is a high shear homogenizing pump, 8 is a conveying pump, and 9 is a discharge port.

[0071] The macroscopic picture of the dissolver provided by the present invention is as follows Figure 2 shown.

[0072] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0073] Example 1

[0074] A dissolver, comprising a mixing box, a homogenizing pump, a pulping machine, a shearing mixer, a liquid storage tank, a sensor, a valve and a PLC control system;

[0075] The mixing box contains a high-speed stirrer; the stirring rate of the high-speed stirrer is 3000 rpm, and the stirring time is 20 minutes; the mixing box is a cylindrical mixing box; the diameter of the mixing box is 0.4 m, and the height is 0.4 m;

[0076] The homogenizing pump (Shanghai Yiken Machinery Equipment Co., Ltd., model ERS2000) is installed under the mixing box and connected to the mixing box. The motor power of the homogenizing pump is 5.5kw;

[0077] The refiner (Hunan Zhengda Jingyan Manufacturing Co., Ltd., model: SBG 350) is connected to the homogenizing pump, and the motor power of the refiner is 15kw;

[0078] The shear mixer is connected to the refiner, the motor power of the shear mixer is 10kw, and the speed of the shear mixer is 2000rpm;

[0079] The liquid storage tank is connected to the shear mixer and also includes a high and low position controller. When the liquid storage tank is lower than 1m 3 The system automatically turns on the system when the tank is higher than 1.05m 3 The system automatically shuts down when the liquid storage tank is a rectangular liquid storage tank; the length, width and height of the liquid storage tank are 1m respectively; the volume of the liquid storage tank is 1m 3 ;

[0080] The sensors include a viscosity sensor, a concentration sensor, a density sensor, a flow sensor and a pH value sensor. The sensors are located inside the liquid storage tank and are Siemens S7-200SMART series sensors.

[0081] A PLC electric control system is adopted. The I / O module in the PLC control system transmits the sensor signal to the PLC, which is processed by the CPU. The processed result will be converted into a control signal and sent to the actuator by the output module. The actuator operates the controlled object, including starting and stopping the homogenizing pump and opening the valve.

[0082] Example 2

[0083] The preparation method of liquid dust suppressant is:

[0084] (1) 350 g of xanthan gum (food grade) and 145 g of 95% ethanol aqueous solution were stirred in a mixing and stirring kettle at 1200 rpm for 25 min to obtain a mixed solution, wherein the mass ratio of xanthan gum to 95% ethanol aqueous solution was 2.4:1;

[0085] (2) 300 g of 10# white oil and 30 g of white oil emulsifier were stirred in a shear stirring kettle at 1500 rpm for 25 min to obtain an emulsion, wherein the mass ratio of 10# white oil to white oil emulsifier was 10:1;

[0086] (3) Add 10 g of silicon dioxide and 10 g of organic bentonite to the emulsion obtained in step (2), stir at 1200 rpm for 15 min, add the mixed solution obtained in step (1), stir at 1200 rpm for 15 min, add 100 g of maltodextrin (food grade) and 65 g of seaweed powder, stir at 400 rpm for 25 min to obtain a liquid dust suppressant, wherein the mass ratio of the emulsion to silicon dioxide is 330:10, the mass ratio of silicon dioxide to organic bentonite is 1:1, and the mass ratio of the emulsion, the mixed solution, maltodextrin and seaweed powder is 330:495:100:65.

[0087] The liquid dust suppressant in Example 2 was mixed with water through the dissolver in Example 1 and then sprayed. The mass ratio of dust suppressant to water was 1:200, and the spraying amount was 3500 mL / m 3 The viscosity of the mixed solution obtained by mixing the liquid dust suppressant in Example 2 with water is 75mpa.s, pH 7.5, odor: no obvious irritating odor, color: light color, flash point 68°C, the thickness of the cured layer after spraying is 18mm, and the compressive strength of the cured layer is 1050g / cm 2 .

[0088] Example 3

[0089] The preparation method of liquid dust suppressant is:

[0090] (1) 200 g of sodium polyacrylate (number average molecular weight 20,000), 150 g of xanthan gum (food grade) and 65 g of 95% ethanol aqueous solution were stirred in a mixing and stirring kettle at 1,200 rpm for 25 min to obtain a mixed solution, wherein the mass ratio of the total mass of sodium polyacrylate and xanthan gum to the 95% ethanol aqueous solution was 5.4:1;

[0091] (2) 380 g of 10# white oil and 40 g of white oil emulsifier were stirred in a shear stirring kettle at 1500 rpm for 25 min to obtain an emulsion, wherein the mass ratio of 10# white oil to white oil emulsifier was 9.5:1;

[0092] (3) Add 10 g of silicon dioxide and 10 g of organic bentonite to the emulsion obtained in step (2), stir at 1200 rpm for 15 min, add the mixed solution obtained in step (1), stir at 1200 rpm for 15 min, add 150 g of maltodextrin (food grade) and 85 g of seaweed powder, stir at 400 rpm for 25 min to obtain a liquid dust suppressant, wherein the mass ratio of the emulsion to silicon dioxide is 420:10, the mass ratio of silicon dioxide to organic bentonite is 1:1, and the mass ratio of the emulsion, the mixed solution, maltodextrin and seaweed powder is 420:415:150:85.

[0093] The liquid dust suppressant in Example 3 was mixed with water through the dissolver in Example 1 and then sprayed. The mass ratio of dust suppressant to water was 1:200, and the spraying amount was 3500 mL / m 3 The viscosity of the mixed solution obtained by mixing the liquid dust suppressant in Example 3 with water is 55mpa.s, pH 8.5, odor: no obvious irritating odor, color: light color, flash point 63°C, the thickness of the cured layer after spraying is 14mm, and the compressive strength of the cured layer is 950g / cm 2 .

[0094] Example 4

[0095] The preparation method of liquid dust suppressant is:

[0096] (1) 150 g of sodium polyacrylate (number average molecular weight 20,000), 200 g of carboxymethyl cellulose (degree of substitution 0.90 DS, viscosity 1500 mPa.s) and 245 g of 95% ethanol aqueous solution were stirred in a mixing and stirring kettle at 1000 rpm for 25 min to obtain a mixed solution, wherein the mass ratio of the total mass of sodium polyacrylate and carboxymethyl cellulose to the 95% ethanol aqueous solution was 1.4:1;

[0097] (2) 200 g of 10# white oil and 20 g of white oil emulsifier were stirred in a shear stirring kettle at 1500 rpm for 25 min to obtain an emulsion, wherein the mass ratio of 10# white oil to white oil emulsifier was 10:1;

[0098] (3) Add 10 g of silicon dioxide and 10 g of organic bentonite to the emulsion obtained in step (2), stir at 1000 rpm for 15 min, add the mixed solution obtained in step (1), stir at 1000 rpm for 15 min, add 100 g of maltodextrin (food grade) and 65 g of seaweed powder, stir at 350 rpm for 25 min to obtain a liquid dust suppressant, wherein the mass ratio of the emulsion to silicon dioxide is 220:10, the mass ratio of silicon dioxide to organic bentonite is 1:1, and the mass ratio of the emulsion, the mixed solution, maltodextrin and seaweed powder is 220:595:100:65.

[0099] The liquid dust suppressant in Example 4 was mixed with water through the dissolver in Example 1 and then sprayed. The mass ratio of dust suppressant to water was 1:200, and the spraying amount was 3500 mL / m 3 The viscosity of the mixed solution obtained by mixing the liquid dust suppressant in Example 4 with water is 35mpa.s, pH 7.0, odor: no obvious irritating odor, color: light color, flash point 61°C, the thickness of the cured layer after spraying is 11mm, and the compressive strength of the cured layer is 700g / cm 2 .

[0100] Example 5

[0101] The preparation method of liquid dust suppressant is:

[0102] (1) 80 g of xanthan gum (food grade) and 60 g of 95% ethanol aqueous solution were stirred in a mixing and stirring kettle at 1000 rpm for 25 min to obtain a mixed solution, wherein the mass ratio of xanthan gum to 95% ethanol aqueous solution was 1.3:1;

[0103] (2) 190 g of 10# white oil and 15 g of white oil emulsifier were stirred in a shear stirring kettle at 1700 rpm for 25 min to obtain an emulsion, wherein the mass ratio of 10# white oil to white oil emulsifier was 12.7:1;

[0104] (3) Add 8 g of silicon dioxide and 8 g of organic bentonite to the emulsion obtained in step (2), stir at 1000 rpm for 15 min, add the mixed solution obtained in step (1), stir at 1000 rpm for 15 min, add 100 g of maltodextrin (food grade) and 55 g of seaweed powder, stir at 350 rpm for 25 min to obtain a liquid dust suppressant, wherein the mass ratio of the emulsion to silicon dioxide is 205:8, the mass ratio of silicon dioxide to organic bentonite is 1:1, and the mass ratio of the emulsion, the mixed solution, maltodextrin and seaweed powder is 205:140:100:55.

[0105] The liquid dust suppressant in Example 5 was mixed with water through the dissolver in Example 1 and then sprayed. The mass ratio of the dust suppressant to water was 1:200, and the spraying amount was 3500 mL / m 3 The viscosity of the mixed solution obtained by mixing the liquid dust suppressant in Example 5 with water is 15mpa.s, pH 7.5, odor: no obvious irritating odor, color: light color, flash point 60.7℃, the thickness of the cured layer after spraying is 10.8mm, and the compressive strength of the cured layer is 650g / cm 2 .

[0106] Example 6

[0107] The preparation method of liquid dust suppressant is:

[0108] (1) 150 g of xanthan gum (food grade), 150 g of hydroxyguar gum, 50 g of carboxymethyl cellulose (substitution degree 0.90 DS, viscosity 1500 mPa.s) and 145 g of 95% ethanol aqueous solution were stirred in a mixing and stirring kettle at a speed of 1150 rpm for 25 min to obtain a mixed solution, wherein the mass ratio of the total mass of xanthan gum, hydroxyguar gum and carboxymethyl cellulose to the 95% ethanol aqueous solution was 2.4:1;

[0109] (2) 300 g of 10# white oil and 30 g of white oil emulsifier were stirred in a shear stirring kettle at 1700 rpm for 25 min to obtain an emulsion, wherein the mass ratio of 10# white oil to white oil emulsifier was 10:1;

[0110] (3) Add 10 g of silicon dioxide and 10 g of organic bentonite to the emulsion obtained in step (2), stir at 1200 rpm for 15 min, add the mixed solution obtained in step (1), stir at 1200 rpm for 15 min, add 100 g of maltodextrin (food grade) and 65 g of seaweed powder, stir at 400 rpm for 25 min to obtain a liquid dust suppressant, wherein the mass ratio of the emulsion to silicon dioxide is 330:10, the mass ratio of silicon dioxide to organic bentonite is 1:1, and the mass ratio of the emulsion, the mixed solution, maltodextrin and seaweed powder is 330:495:100:65.

[0111] The liquid dust suppressant in Example 6 was mixed with water through the dissolver in Example 1 and then sprayed. The mass ratio of dust suppressant to water was 1:200, and the spraying amount was 3500 mL / m 3 The viscosity of the mixed solution obtained by mixing the liquid dust suppressant and water in Example 6 is 60mpa.s, pH 7.5, odor: no obvious irritating odor, color: light color, flash point 62.8℃, the thickness of the cured layer after spraying is 13.6mm, and the compressive strength of the cured layer is 850g / cm 2 .

[0112] Example 7

[0113] The preparation method of liquid dust suppressant is:

[0114] (1) 200 g of sodium polyacrylate (number average molecular weight 20,000), 150 g of xanthan gum (food grade) and 65 g of 95% ethanol aqueous solution were stirred in a mixing and stirring kettle at 1,300 rpm for 25 min to obtain a mixed solution, wherein the mass ratio of the total mass of sodium polyacrylate and xanthan gum to the 95% ethanol aqueous solution was 5.4:1;

[0115] (2) 500 mL of mineral oil (u-30° C. transformer oil), 35 g of glyceryl monostearate, and 8 g of S-80 emulsifier were stirred in a shear stirring kettle at 2000 rpm for 25 min to obtain an emulsion, wherein the ratio of the mass of the mineral oil to the total mass of glyceryl monostearate and the S-80 emulsifier was 11.6:1;

[0116] (3) Add the mixed solution obtained in step (1) to the emulsion obtained in step (2), stir at 1200 rpm for 15 min, add 150 g of maltodextrin (food grade) and 85 g of seaweed powder, stir at 400 rpm for 25 min to obtain a liquid dust suppressant, wherein the mass ratio of the emulsion, the mixed solution, the maltodextrin and the seaweed powder is 541.8:415:150:85.

[0117] The liquid dust suppressant in Example 7 was mixed with water through the dissolver in Example 1 and then sprayed. The mass ratio of the dust suppressant to water was 1:200, and the spraying amount was 3500 mL / m 3 The viscosity of the mixed solution obtained by mixing the liquid dust suppressant in Example 7 with water is 25mpa.s, pH 7.5, odor: no obvious irritating odor, color: light color, flash point 56°C, the thickness of the cured layer after spraying is 2.5mm, and the compressive strength of the cured layer is 250g / cm 2 .

[0118] Example 8

[0119] The preparation method of liquid dust suppressant is:

[0120] (1) 350 g of xanthan gum (food grade) and 145 g of 95% ethanol aqueous solution were stirred in a mixing and stirring kettle at a speed of 1150 rpm for 25 min to obtain a mixed solution, wherein the mass ratio of xanthan gum to 95% ethanol aqueous solution was 2.4:1;

[0121] (2) 500 mL of -10# diesel, 12 g of sodium petroleum sulfonate, and 26 g of glyceryl monostearate were stirred in a shear stirring kettle at 2000 rpm for 25 min to obtain an emulsion, wherein the ratio of the mass of -10# diesel to the total mass of sodium petroleum sulfonate and glyceryl monostearate was 13.2:1;

[0122] (3) Add the mixed solution obtained in step (1) to the emulsion obtained in step (2), stir at 1200 rpm for 15 min, add 100 g of maltodextrin (food grade) and 65 g of seaweed powder, stir at 400 rpm for 25 min to obtain a liquid dust suppressant, wherein the mass ratio of the emulsion, the mixed solution, the maltodextrin and the seaweed powder is 539.6:495:100:65.

[0123] The liquid dust suppressant in Example 8 was mixed with water through the dissolver in Example 1 and then sprayed. The mass ratio of dust suppressant to water was 1:200, and the spraying amount was 3500 mL / m 3The viscosity of the mixed solution obtained by mixing the liquid dust suppressant in Example 8 with water is 35mpa.s, pH 8.5, odor: no obvious irritating odor, color: light color, flash point 57.8℃, the thickness of the cured layer after spraying is 3.5mm, and the compressive strength of the cured layer is 300g / cm 2 .

[0124] It can be seen from the above examples that the film formed by spraying the liquid dust suppressant prepared by the present invention mixed with water has a higher compressive strength.

[0125] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing a liquid dust suppressant, characterized in that: The following steps are involved: (1) mixing an adhesive with a polyol to obtain a mixed solution; (2) mixing the machine oil with an emulsifier and emulsifying the mixture to obtain an emulsion; (3) mixing the emulsion obtained in step (2) with the mixed solution, auxiliary materials and film-forming agent obtained in step (1) to obtain a liquid dust suppressant; There is no chronological order for steps (1) and (2).

2. The preparation method according to claim 1, characterized in that: The adhesive in step (1) includes one or more of xanthan gum, sodium polyacrylate, carboxymethyl cellulose and hydroxyguar gum.

3. The preparation method according to claim 1, characterized in that: The polyol in step (1) includes one or more of ethanol aqueous solution, glycerol, pentaerythritol, polyvinyl alcohol and sorbitol.

4. The preparation method according to claim 1, characterized in that: The mass ratio of the adhesive to the polyol in the step (1) is (1-6):

1.

5. The preparation method according to claim 1, characterized in that: The machine oil in step (2) includes one or more of white oil, mineral oil, diesel and base oil.

6. The preparation method according to claim 1, characterized in that: The emulsifier in step (2) includes one or more of stearic acid, glyceryl monostearate, sodium dodecylbenzene sulfonate, sodium petroleum acid sulfonate, S-80 emulsifier and white oil emulsifier.

7. The preparation method according to claim 1, characterized in that: The mass ratio of the machine oil to the emulsifier in the step (2) is (9-15):

1.

8. The preparation method according to claim 1, characterized in that: In the step (3), the mass ratio of the emulsion, the mixed solution, the auxiliary material and the film-forming agent is (200-550): (100-600): (100-150): (50-90).

9. The liquid dust suppressant prepared by the preparation method according to any one of claims 1 to 8.

10. A dissolver for dissolving the liquid dust suppressant according to claim 9, comprising a mixing box, a homogenizing pump, a refiner, a shearing mixer, a liquid storage tank, a sensor and a PLC control system.

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