A composition with dual function of dust suppression and dust reduction and a preparation method thereof

Abstract

The present application relates to the dust control technology field of construction operation environment, and particularly relates to a composition with dual functions of dust suppression and dust reduction and a preparation method, the composition comprises the following components in parts by weight: 5-10 parts of a surfactant, 1-4 parts of a foam synergist, 2-15 parts of a foam sustainer, 0.4-1 part of a dust suppressant, and the balance of deionized water. Through reasonable selection of the formula and setting of each step and parameter of the preparation method, when the composition is applied in the fields of mining industry, port terminal, industrial production, tunnel construction and the like, the dust concentration on site can be effectively reduced and the dust dispersion can be inhibited, the material is green and non-polluting, and batch production and popularization and use can be realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of working environment control, and relates to the technical field of dust control in working environment, in particular to a composition with dual functions of dust suppression and dust reduction and a preparation method thereof. BACKGROUND

[0002] In the fields of mining industry, port terminal, industrial production, tunnel construction, etc., dust pollution is a common problem that harms the occupational safety and health of personnel. For example, in a tunnel construction site, various processes such as blasting, shotcreting, and slagging will generate a large amount of dust. In addition, a large amount of dust accumulates on the road in the tunnel construction area, and under the action of vehicles or wind, secondary dust will be formed, which not only threatens the health of the workers, but also reduces the visibility of the work site, increases the difficulty of work and safety risks.

[0003] In the prior art, the main measures for dust removal are spraying, ventilation, and setting dust removal equipment, and the effects of these measures are not very ideal. There are also foam dust removal agents in the prior art, but these dust removal agents mainly focus on dust removal, and basically pay little attention to dust suppression. Chinese patent CN101385955B discloses a mine foam dust removal agent, which mainly focuses on dust removal effect and pays little attention to dust suppression.

[0004] Chinese patent CN104531076B discloses a wet-type water-retention dust reduction agent, which, while focusing on dust removal, achieves the effect of suppressing dust by setting cetyltrimethylammonium bromide, but it prevents dust from being raised again by keeping it wet, and the dust suppression duration needs to be improved.

[0005] The process of discrete foam dust reduction mainly involves spreading a compounded foam solvent into a film on a foaming device, blowing air into the film to stretch the film, and spontaneously closing the series of bubbles to block, capture, and suppress dust.

[0006] Chinese patent CN116640583A discloses a solid wetting agent formula for coal roadway tunneling working face, which, based on the physicochemical properties of coal dust, obtains an optimal formula of wetting agent and hygroscopic agent through orthogonal complex experiments, thereby enhancing the wettability of coal body. Chinese patent CN113583631A discloses a bio-based dust suppression material and encapsulated capsule, which enhances dust suppression based on hygroscopic and water-retention effects. Chinese patent CN114806507B discloses an environmentally friendly dust suppressant and its preparation method and application. However, most of these dust suppression solutions are difficult to achieve the purpose of dust reduction in large spaces and dust suppression on roads. Therefore, it is urgent to propose a product with dual functions of dust suppression and dust reduction that can be used with discrete foam generating devices in various working sites, thereby effectively improving the site environment. SUMMARY

[0007] In view of the above technical problems existing in the prior art, the present application provides a composition with dual functions of dust suppression and dust reduction and a preparation method thereof.

[0008] The technical scheme is implemented as follows:

[0009] A composition with dual functions of dust suppression and dust reduction, the formula of the composition is as follows: 5-10 parts by weight of a surfactant, 1-4 parts by weight of a foam synergist, 2-15 parts by weight of a foam stabilizer, 0.4-1 part by weight of a dust suppressant, and 70-91.6 parts by weight of deionized water; the composition is obtained by stirring the surfactant and the deionized water uniformly and dissolving them first, then stirring the obtained material and the foam synergist uniformly and dissolving them, then stirring the obtained material and the foam stabilizer uniformly and standing, and finally stirring the obtained material and the dust suppressant uniformly and standing after verification.

[0010] Further, the surfactant is selected from one or more of Tween-40, sodium dodecyl sulfate or sodium alpha-alkenyl sulfonate.

[0011] Further, the foam synergist is selected from one or more of anhydrous dextrose, coconut oil diethanolamide or ammonium tripolyphosphate.

[0012] Further, the foam stabilizer is selected from one or more of glycerol, trisodium dicarboxymethylalaninate or polyvinyl alcohol.

[0013] Further, the dust suppressant is selected from one or both of sodium lignosulfonate or Triton X-100.

[0014] A preparation method of a composition with dual functions of dust suppression and dust reduction, the formula of the composition is the formula of the above composition, comprising the following steps:

[0015] S1, configuration of deionized water: deionized water is obtained by deionizing high-quality raw water with a deionizer, and the obtained deionized water is heated to 60-80°C with the deionizer.

[0016] S2, configuration of the first mixed solution: 5-10 parts by weight of the surfactant is mixed with 70-91.6 parts by weight of the deionized water prepared and heated in step S1, and stirred in a reaction kettle at a rotation speed of 160-200 r / min, the stirring time is 5-10 min, and the stirring temperature is 55-65°C (preferably 60°C), to obtain a first mixed solution which is stirred uniformly and the precipitate is completely dissolved.

[0017] S3, the second mixed solution is configured: the first mixed solution 8-12 min after standing in step S2 to make it completely stable, take 1-4 parts by weight of the foam synergist added to the first mixed solution after standing and mixed at a speed of 100-120 r / min, stirring time is 5-10 min, the stirring temperature is 38-42℃ (preferably 40℃), the residual material in the reactor is completely dissolved, and the second mixed solution is obtained.

[0018] S4, the configuration of the foam dust fall solution: the second mixed solution obtained in step S3 is completely stable after standing for 12-18 min, 2-15 parts by weight of the foam preservative is added to the second mixed solution after standing and mixed at a speed of 100-120 r / min, the stirring time is 10-15 min, the stirring temperature is 36-45℃ (preferably 40℃), the mixture is completely dissolved and is placed for 8-12 min, and the foam dust fall solution is obtained.

[0019] S5, performance verification of the foam dust fall solution: the foam dust fall solution obtained in step S4 is not placed for more than 48 hours, then the foam dust fall solution is sampled, the sampled sample is placed in a discrete foam generator to evaluate the foam generation density, the spray distance and the foam stability, if the foam generation density exceeds the density threshold value, and the spray distance is greater than the distance threshold value, and the foam life is higher than the life threshold value, the performance of the foam dust fall solution meets the standard, and step S6 is carried out; if any one of the foam generation density, the spray distance and the foam life is lower than the set density threshold value, distance threshold value or life threshold value, the solution is discarded, and step S1 is carried out again; the density threshold value is 595-605 / minute (preferably 600 / minute), the distance threshold value is 0.9-1.2 meters (preferably 1 meter), and the life threshold value is 28-32 seconds (preferably 30 seconds).

[0020] S6, the configuration of the foam dust suppression and dust fall composition: 0.4-1 parts by weight of the dust suppressant is added to the foam dust fall solution obtained in step S4, stirred for 10-15 min, and then completely dissolved, and placed at room temperature for 12-20 h to obtain the final composition with the dual functions of dust suppression and dust fall.

[0021] Further, the stirring temperature in step S6 is 60-80℃.

[0022] Further, in step S5, the re-performing step S1 is specifically adjusting the specific values of the parameters within the set range in step S1, step S2, step S3 and / or step S4 (for example, if the density is lower than 595 / minute, the proportion of the foam synergist is increased slightly, etc.).

[0023] Further, the prepared composition with the dual function of dust suppression and dust reduction has a contact angle of less than 18° measured by taking quartz sand, limestone powder or coal powder as a substrate; a wind erosion mass loss of less than 1.5 wt.% in 3 hours; and an average bubble foam life of more than 48s.

[0024] Further, the anti-wind erosion medium used in the anti-wind erosion is one or more of quartz sand, limestone powder or coal powder.

[0025] An application method of a composition with the dual function of dust suppression and dust reduction, the application method is that when dust exists in the mining industry, port, industrial production or tunnel construction, the composition prepared by the preparation method is sprayed to the escaping dust in the form of foam at a flow rate of 0.7-1.5L / min by a discrete foam generating device.

[0026] The technical effect of the present application is that:

[0027] 1. The present application can better adapt the composition of the present application to the discrete foam generating device by reasonably setting the components in the formula, especially by reasonably configuring the proportion of each component, so that the composition can fill the discrete foam in a large space, and a large amount of stable discrete foam can be sprayed to the escaping dust at a flow rate of 0.7-1.5L / min after the solution is sucked by a peristaltic pump, so that the suspended dust in the air can be intercepted, adhered and captured, and when the foam combines with the dust, the settling or crushing to the ground can be accelerated, and a stable and tough shell film can be formed on the surface of the dust settled on the ground, thereby greatly reducing the secondary flying of the ground dust.

[0028] 2. The formula and content ratio set by the present application cooperate with the preparation method set by the present application, so that the surfactant can not only significantly reduce the surface tension of the foam solution, but also more easily form discrete bubbles due to the setting of the configuration sequence of the preparation method, so that the hydrophilic end of the surfactant can be attracted to uniform arrangement by water molecules, and the hydrophobic end molecules can be arranged on the air side inside and outside the foam, forming a protective film inside and outside the foam. Through the performance verification step of the foam dust reduction solution, the required performance of the composition suitable for the use conditions of the present application is strengthened, thereby greatly improving the stability of the overall performance requirements of the obtained composition, and through the setting of the temperature parameters of each preparation step, the coordination between the components is strengthened, the wettability of the dust suppressant and the dust is strengthened, and the shell can be condensed more quickly to achieve the purpose of dust suppression. Cooperate with the setting of the discrete foam generating device, so that the dust settled on the ground can form a more stable and tough shell film on the surface, thereby strengthening the dust suppression effect.

[0029] 3, The present application is prepared by the setting of the components and content of the formula, the preparation method of each step and the parameter setting of each step, so that the composition prepared by the present application can be adapted to the discrete foam generating device, and the adhesion, wetness and coverage of the foam can be used to effectively inhibit the dispersion of dust and ground dust in the construction site environment. The foam solution with the dual functions of dust suppression and dust reduction contains components that can reduce the surface tension of the liquid to form bubbles and improve the stability of the foam and enhance its wetting performance with dust. The obtained composition can realize the dual efficient function of dust suppression and dust reduction, can greatly improve the working environment of workers, reduce the risk of occupational diseases such as pneumoconiosis by reducing the exposure of dust, and improve the working environment and health of workers; at the same time, the present application can greatly reduce the concentration of dust, reduce the possibility of explosion, and reduce the risk of dust explosion; at the same time, due to the reduction of dust, the wear and failure of equipment are also reduced, the pollution to the surrounding environment is also reduced, and the compliance and legality of the occupational health and safety standards can be met. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a flowchart of the preparation method of an embodiment of the present application.

[0031] Figure 2 is a schematic diagram of the contact angle result of the specific embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0033] An embodiment of the present invention provides a composition with dual functions of dust suppression and dust reduction. The composition is formulated in the following weight parts: 5-10 parts by weight of a surfactant (e.g., 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 7 parts by weight, 7.5 parts by weight, 8 parts by weight, 8.5 parts by weight, 9 parts by weight, or 9.5 parts by weight), wherein the surfactant is selected from one or more of Tween-40, sodium dodecyl sulfate, or sodium α-olefin sulfonate; 1-4 parts by weight of a foam enhancer (e.g., 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, or 3.5 parts by weight), wherein the foam enhancer is selected from one or more of anhydrous glucose, coconut oil diethanolamide, or ammonium tripolyphosphate (preferably anhydrous glucose); 2-15 parts by weight of... The composition comprises: a foam-dampening agent (e.g., 2.5 parts by weight, 3.8 parts by weight, 5.5 parts by weight, 6.2 parts by weight, 7.5 parts by weight, 9.5 parts by weight, 10.5 parts by weight, 11 parts by weight, or 13 parts by weight), wherein the foam-dampening agent is selected from one or more of glycerol, trisodium dicarboxymethyl alanine, or polyvinyl alcohol; 0.4 to 1 part by weight of a dust suppressant, wherein the dust suppressant is selected from one or two of sodium lignosulfonate or Triton X-100; and the remainder is deionized water. The composition is obtained by first mixing and dissolving the surfactant with deionized water, then mixing and dissolving the resulting material with the foam enhancer, then mixing the resulting material with the foam-dampening agent and allowing it to stand. After verification, the resulting material is then mixed and allowed to stand to obtain the composition.

[0034] Each component in the composition not only fulfills its individual function but also, through the specific content and preparation method set in this invention, achieves a close synergistic effect. Specifically: the surfactant significantly reduces the surface tension of the foam solution, facilitating the formation of discrete bubbles. The monomeric bubble structure consists of two solution layers with a water film sandwiched between them. The hydrophilic end of the surfactant is attracted to water molecules and arranged uniformly, while the hydrophobic end molecules are arranged on the air sides inside and outside the foam, forming a protective film on the inner and outer sides. The addition of synergists and persistence agents improves foam stability and maintains foam lifespan. Foam exposed to dry air will displace the liquid due to gravity and pressure difference, or due to dust adhesion, causing the liquid film to thin and break down faster. With the addition of synergists and persistence agents, water molecules are linked to synergist / persistent agent molecules by hydrogen bonds, slowing down solution evaporation and breakage. The dust suppressant enhances the wettability of the solution with dust, causing it to rapidly condense into a shell to achieve dust suppression. The ejected discrete foam captures and breaks down dust in the air, settling on the dust surface on the ground to form a stable and resilient film, effectively suppressing secondary dust re-entrainment.

[0035] Example 1

[0036] like Figure 1 As shown, it includes the following steps:

[0037] S1, configuration of deionized water: use a deionizer to deionize high-quality raw water, and use the deionizer to heat it to 80 degrees.

[0038] S2, configuration of the first mixed solution: take 10 parts by weight of the surfactant Tween-40 and the deionized water prepared in step S1 and stir them in a reaction kettle at a speed of 180 r / min, the stirring time is 8 min, the stirring temperature is 60 degrees Celsius, after the liquid is uniformly stirred and the precipitate is completely dissolved, the first mixed solution is obtained.

[0039] S3, configuration of the second mixed solution: let the first mixed solution stand for about 10 min until it is completely stable, take 2 parts by weight of the foam booster anhydrous glucose and mix it with the first mixed solution successfully configured in step S2 at a speed of 110 r / min, the stirring time is 9 min, the stirring temperature is 40 degrees Celsius, after the residual substances in the reaction kettle are completely dissolved, the second mixed solution is obtained.

[0040] S4, configuration of the foam dust suppression solution: let the second mixed solution stand for about 15 min until it is completely stable, take 15 parts by weight of the foam stabilizer glycerol and mix it with the second mixed solution successfully configured in step S3 at a speed of 115 r / min, the stirring time is 13 min, the stirring temperature is 40 degrees Celsius, after it is completely dissolved and stands for 10 min, the foam dust suppression solution is obtained.

[0041] S5, performance verification of the foam dust suppression solution: after the configuration of the foam dust suppression solution in step S4 is completed, the obtained solution is allowed to stand for no more than 48 hours to ensure that it reaches stability, then sampling is performed and the discrete foam generator is used to evaluate the foam generation density, spray distance and foam stability, the experimental data shows that the foam generation density is more than 600 per minute, the spray distance is greater than 1 meter, and the foam life is higher than 30 seconds, the solution properties meet the standards, and the subsequent foam dust suppression solution experiment configuration can continue (through the arrangement of the present application, the solution properties basically meet the standards, and there is a very small probability that they do not meet the standards, once this situation occurs, only a small amount of adjustment of one or several parameters in the foregoing steps is needed to reprepare, then the solution properties will meet the standards).

[0042] S6, configuration of the foam dust suppressant: take 0.4 parts of sodium lignosulfonate (in other embodiments, for example, 0.6 parts by weight, 0.8 parts by weight, 1 part by weight, etc. can be taken) and add it to the foam solution successfully configured in S4, continuously stir, after 13 min, until it is completely dissolved, stand at room temperature for 18 h, and the final foam dust suppressant is obtained.

[0043] Example 2

[0044] The preparation method of the composition with the dual functions of dust suppression and dust reduction comprises the following steps:

[0045] S1, Preparation of deionized water: The high-quality raw water was deionized by a deionizer, and heated to 75 degrees by the deionizer.

[0046] S2, Preparation of the first mixed solution: 10 parts by weight of the surfactant Tween-40 was taken and mixed with the deionized water prepared in step S1 in a reaction kettle at a stirring speed of 190 r / min. The stirring time was 8 min, and the stirring temperature was 60 degrees Celsius. After the liquid was completely dissolved, the first mixed solution was obtained.

[0047] S3, Preparation of the second mixed solution: The first mixed solution was allowed to stand for about 10 min until it was completely stable. 2 parts by weight of the foam booster anhydrous glucose was taken and mixed with the first mixed solution prepared in step S2 at a stirring speed of 110 r / min. The stirring time was 8 min, and the stirring temperature was 40 degrees Celsius. After the residual substances in the reaction kettle were completely dissolved, the second mixed solution was obtained.

[0048] S4, Preparation of the foam dust suppression solution: The second mixed solution was allowed to stand for about 15 min until it was completely stable. 15 parts by weight of the foam stabilizer glycerol was taken and mixed with the second mixed solution prepared in step S3 at a stirring speed of 108 r / min. The stirring time was 13 min, and the stirring temperature was 40 degrees Celsius. After it was completely dissolved and allowed to stand for 10 min, the foam dust suppression solution was obtained.

[0049] S5, Performance verification of the foam dust suppression solution: After the preparation of the foam dust suppression solution in step S4 was completed, the obtained solution was allowed to stand for no more than 48 hours to ensure that it reached stability. Then, the sample was taken and evaluated for foam generation density, spraying distance, and foam stability using a discrete foam generator. The experimental data showed that the foam generation density was more than 600 per minute, the spraying distance was greater than 0.98 meters, and the foam life was higher than 32 seconds. The solution properties met the standards, and the subsequent foam dust suppression solution experiment configuration could continue.

[0050] S6, Preparation of the foam dust suppressant: 0.6 parts by weight of Triton X-100 (in other embodiments, for example, 0.4 parts by weight, 0.8 parts by weight, 1 part by weight, etc. can be taken) was added to the foam solution prepared in S4, and continuously stirred until it was completely dissolved after 10-15 min. After standing at room temperature for 12-20 h, the final foam dust suppressant was obtained.

[0051] Comparative Example 1

[0052] The other settings of this comparative example were the same as those of Example 1, except that step S6 was not set, which was used to compare the performance influence of not adding the dust suppressant. The results are shown in Table 3.

[0053] The foam dust suppressant samples configured in Example 1 and Example 2 were subjected to evaluation of foam performance. Three main core indicators were included: stability of the foam (foam life) (at the same time, Comparative Example 1 was compared), wind erosion resistance, and contact angle with the wind erosion resistance application medium.

[0054] wherein:

[0055] I. Contact angle measurement experiment:

[0056] 1. The quartz sand (or limestone ore powder or coal powder in other examples) was pressed into tablets.

[0057] The required quartz sand powder raw material was prepared, the required weight of the quartz sand powder for each mold hole was weighed using a precision balance to ensure the consistency of the quartz sand quality; the weighed quartz sand powder was uniformly filled into the mold hole of the tablet press, the upper and lower wheel pressure of the tablet press was adjusted, the pressing time was set to 2 minutes, and the tablet press was started to press the quartz sand powder. After the pressing was completed, the tablets were taken out, the size and average mass of the obtained tablets were recorded, and the tablet quality was checked to see if it met the experimental requirements; the qualified quartz sand tablets were collected and arranged for contact angle measurement.

[0058] 2. Measurement of contact angle.

[0059] The contact angle measuring instrument was turned on to ensure that the equipment was clean and calibrated; the contact angle measuring instrument was connected to the control computer; the prepared quartz sand tablets were placed on the measurement tray of the contact angle measuring instrument, and the tablet position was adjusted to be at the center of the instrument focal point; a certain amount of foam dust suppression solution of the present application was sucked using a precision syringe to ensure the consistency of the drop volume; the syringe was fixed to the set drop position, and a drop of foam solution was slowly dropped onto the surface of the tablet; the computer control software was started simultaneously to start video recording and contact angle measurement. The time from the moment the drop contacted the tablet to the stable shape of the drop was observed and recorded; the contact angle data obtained by software processing were analyzed, and the contact angle values of each quartz sand tablet were recorded to obtain the schematic diagram of the contact angle result as shown in Figure 2 , wherein a is the contact angle value measured in Example 1, and b is the contact angle value measured in Example 2. The final contact angle measurement results are shown in Table 1, which is the contact angle measurement experimental data value of Example 1 and Example 2. Figure 2

[0060] Table 1

[0061]

[0062] ​CAleft[°] is the left side degree, CA right[°] is the right side degree, and CA mean[°] is the final degree in Table 1. As can be seen from the contact angle measurement results in Table 1, the foam solution of Example 1 and Example 2 has a smaller contact angle, indicating that the liquid has better wettability on the surface of the dust. A smaller contact angle means that the foam dust suppression solution can quickly wet and capture dust in the air, and has good dust suppression effect.

[0063] II. Wind erosion resistance experiment

[0064] A 50g sample of quartz sand (limestone ore powder or coal powder can also be used in other examples) dust was placed in a 90mm petri dish to make a conical dust pile model. A spray bottle was used to spray 2L / m 2 of water and the foam dust suppressant of the present application on the surface of the dust pile model (a control experiment was performed), and after drying, a high-pressure centrifugal ventilator was used to blow the surface of the dust pile at a wind speed of 12m / s at a distance of 0.5m from the dust pile for 3h, with an interval of 0.5h to weigh the dust mass, for detecting the wind erosion resistance of the foam solution. The specific results are shown in Table 2, which is the wind erosion resistance experiment measurement data results of Example 1 and Example 2 compared with the same amount of pure water.

[0065] Table 2

[0066]

[0067]

[0068] The data in Table 2 shows that compared with spraying pure water solution, spraying a layer of foam dust suppressant on the outside of the surface of the dust pile model will form a stable dust suppression protective film, and under the action of strong wind, the dust loss rate can be reduced by 40%-80%, thereby effectively preventing the ground dust from flying, spreading and resuspending.

[0069] III. Foam life experiment

[0070] 1. Prepare the foam solution of Example 1 and Example 2 and a beaker, and ensure that the temperature of the solution is consistent with the set temperature of the laboratory.

[0071] 2. Connect one end of a 2-4cm flexible rubber tube to the syringe head, and check that the connection is tight to avoid gas leakage.

[0072] 3. Pull the plunger of the syringe back to the fixed position to prepare for inflation, and mark the position of the plunger to ensure that the amount of injected gas is consistent in each experiment.

[0073] 4. Dip the free end of the rubber tube in the solution to form a liquid film on the cross section of the rubber tube. Ensure that the degree of wetting is consistent each time to reduce experimental bias.

[0074] 5. Stably press the plunger of the syringe to inject gas into the rubber tube, and the liquid film at the end of the rubber tube is inflated and closed to form a foam. The experimental operation needs to ensure that the size of the foam generated each time is similar.

[0075] 6. Start timing when the foam is generated, and observe and record the length of time from the complete generation of the foam to its rupture. Test each solution 10 times, and take the average value as the foam life.

[0076] 7. Repeat the above process to perform the same operation on the foam solutions of Example 1 and Example 2 to obtain data on the foam life under different dust suppressants and concentration gradients. The results obtained are shown in Table 3, which is a table of measurement data of the foam life of Example 1, Example 2, and Comparative Example 1.

[0077] Table 3

[0078]

[0079] As can be seen from Table 3, although the dust suppressant mainly functions to enhance the wettability of the solution and the dust, so that it quickly coagulates into a shell to achieve the purpose of dust suppression, it has little effect on the foam life (such as Example 1), and through Example 2 it can be seen that it has a certain degree of improvement on the foam life (such as Example 2), that is, by reasonably setting the specific dust suppressant and reasonably setting the amount and concentration of its addition, the dust suppressant and the foam stabilizer not only do not show significant mutual exclusion, but also promote the stability of the foam, slightly improve the foam life, so that the dust suppression and dust reduction foam has good stability. Thus, it is further proved that the reasonable selection of the dust suppressant and the reasonable ratio and collocation of the content and other components play a synergistic effect, which enhances the wettability of the dust under the premise of ensuring the stability and life of the foam.

[0080] Comparative Example 2

[0081] The other setting modes of the present comparative example are the same as those of Example 2, except that the amount of Triton X-100 added in step S6 is set to 2.5 parts by weight (not within the range set by the present application, the content is higher than the range set by the present application), and the other setting modes are the same as those of Example 2. The anti-erosion ability of the product obtained is detected, and the mass at 0 hour is 58.6 g, the mass loss after 3 hours is 1.1 g, and the mass loss rate is 1.87 wt.%. The dust suppressant added is about 4 times that of Example 2, but the anti-erosion effect is significantly reduced. At the same time, the foam life measurement data of the product under the same conditions as Example 2 are compared, and it is found that the average foam life of the present comparative example is 59.709 s, which improves the foam stability to a certain extent. The main reason is that the high concentration of dust suppressant in Comparative Example 2 easily causes the solution to be viscous, and after being sprayed onto the surface of the dust heap model, it is difficult to spread rapidly and wet the dust in a large area, and it is easy to form a cluster and fall under the action of strong wind. It is shown that the setting of the dust suppressant with this content not within the range of the present application does not improve the dust suppression effect, but only enhances the foam life, which also increases the economic cost. Comparative Example 2 contradicts the limitation of the content of each component in the present application, which is not to play its own role, but to have a close coordination effect. It is important to focus on the synergistic effect of each component, and to test the dual effect of foam solution on dust reduction and dust suppression.

[0082] Comparative Example 3

[0083] The formulations and setting ratios of the present comparative example are the same as those of Example 2, except that the preparation steps of Example 2 are not used, but all the surfactants, foam enhancers, foam stabilizers and dust suppressants are mixed and directly added to deionized water for stirring at 60-80°C and 100-120 r / min. After stirring for 30 min, the performance of the obtained mixture is tested by a discrete foam generator. The experiment shows that the foam generation density and foam life have not reached the standard, only a small amount of foam is generated, the monomer film is thin, drainage is rapid and easy to break, and it is difficult to spread into a film at the foaming end to blow out dense and continuous foam.

[0084] Comparative Example 4

[0085] The other setting modes of the present comparative example are the same as those of Example 2, except that no heating treatment is performed in each preparation step, and stirring is performed at room temperature. All other setting modes are the same as those of Example 2. The obtained mixture is tested, and it is found that the solution has incomplete dissolution, serious stratification and a large amount of white foam generated on the surface, which affects the performance test of the foam solution. After standing for 24 h, a gummy substance is precipitated at the bottom, and it is difficult to form a stable and uniform solution. If the foam performance is tested by a foam generator, the instrument will be clogged and damaged.

[0086] Comparative Example 5

[0087] The other setting modes of the present comparative example are the same as those of example 2, except that the stirring speed in each preparation step is set to 200 r / min (i.e. the stirring intensity is greater than the stirring intensity set in the present application), and all other setting modes are the same as those of example 2. The obtained mixture is tested, and it is found that the contact angle, wind erosion resistance and foam life are basically the same as those of example 2. However, due to the increase of stirring speed, the energy consumption is greatly increased, thereby indicating that the different stirring speeds set in each stage of the present application are specifically set based on each different treatment process, and are in the optimal range closely coordinated with other parameters set in each stage. Another setting mode of the present comparative example is that the other setting modes are the same as those of example 2, except that the stirring speed in each preparation step is set to 80 r / min (i.e. the stirring intensity is less than the stirring intensity set in the present application), and all other setting modes are the same as those of example 2. The obtained mixture is tested, and it is found that the solution shows incomplete dissolution phenomenon in S2 step, and gel-like substance is precipitated at the bottom after standing for about 30 h, which is difficult to form a stable and uniform solution. If the foam performance test is carried out using a foam generator, the instrument will be blocked and damaged.

[0088] Comparative example 6

[0089] The other setting modes of the present comparative example are the same as those of example 2, except that the foam synergist is replaced by anhydrous copper sulfate, and all other setting modes are the same as those of example 2. The obtained mixture is tested, and it is found that the average foam life is shortened to 44.668 s, and the foam life is decreased to 14.124 s as the dust suppressant concentration is increased to 1 part by weight, indicating that the formula change has a negative impact on the foam performance and dust suppression effect. The components of the foam solution set in the present application have a synergistic enhancement effect, and can realize the dual goals of dust reduction and dust suppression when used with a discrete foam generating device.

[0090] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application, and cannot be interpreted in any way as a limitation on the protection scope of the present application. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative labor, and these embodiments will fall within the protection scope of the present application.

Claims

1. A composition having dual function of dust suppression and dust reduction, characterized in that, The formula of the composition is: 5-10 parts by weight of a surfactant, 1-4 parts by weight of a foam booster, 2-15 parts by weight of a foam sustainer, 0.4-1 part by weight of a dust suppressant, and 70-91.6 parts by weight of deionized water; The foam booster is selected from one or more of anhydrous dextrose, coconut oil diethanolamide, or ammonium tripolyphosphate; The foam sustainer is selected from one or more of glycerol, trisodium dicarboxymethylalaninate, or polyvinyl alcohol; The dust suppressant is selected from one or both of sodium lignosulfonate or Triton X-100; The method comprises the steps of: S1, deionizing high-quality raw water to obtain deionized water, and heating the obtained deionized water to 60-80°C by a deionizer; S2, mixing 5-10 parts by weight of a surfactant with 70-91.6 parts by weight of the deionized water obtained in step S1, and stirring in a reaction kettle at a speed of 160-200 r / min for 5-10 min at a temperature of 55-65°C to obtain a first mixed solution that is uniformly stirred and has completely dissolved precipitates; S3, allowing the first mixed solution obtained in step S2 to stand for 8-12 min to be completely stable, adding 1-4 parts by weight of a foam booster to the first mixed solution after standing, and mixing and stirring at a speed of 100-120 r / min for 5-10 min at a temperature of 38-42°C, so that the residual substances in the reaction kettle are completely dissolved to obtain a second mixed solution; S4, allowing the second mixed solution obtained in step S3 to stand for 12-18 min to be completely stable, adding 2-15 parts by weight of a foam sustainer to the second mixed solution after standing, and mixing and stirring at a speed of 100-120 r / min for 10-15 min at a temperature of 36-45°C, so that the mixture is completely dissolved and allowed to stand for 8-12 min to obtain a foam dust-settling solution; S5, verifying the performance of the foam dust-settling solution; S6, adding 0.4-1 part by weight of a dust suppressant to the foam dust-settling solution obtained in step S4, stirring for 10-15 min until it is completely dissolved, and allowing it to stand at room temperature for 12-20 h to obtain a final composition having both dust suppression and dust settling functions.

2. The composition having dual function of dust suppression and dust reduction according to claim 1, characterized in that, the surfactant is selected from one or more of Tween-40, sodium dodecyl sulfate, or - one or more of sodium alkenyl sulfonate.

3. A method for preparing a composition having a dual function of dust suppression and dust reduction, characterized in that, The formula of the composition is the formula of the composition of any one of claims 1-2, comprising the following steps: S1, deionizing high-quality raw water to obtain deionized water, and heating the obtained deionized water to 60-80°C by a deionizer; S2, preparing a first mixed solution by mixing 5-10 parts by weight of a surfactant with 70-91.6 parts by weight of the deionized water obtained in step S1 after heating, and stirring in a reaction kettle at a speed of 160-200 r / min for 5-10 min at a temperature of 55-65°C to obtain a first mixed solution that is uniformly stirred and has completely dissolved precipitates; S3, the second mixed liquid configuration: the first mixed liquid 8~12min after standing step S2 to make it completely stable, take 1~4 parts by weight of the foam synergist added to the first mixed liquid after standing and mixing stirring at 100~120r / min speed, stirring time is 5~10min, the stirring temperature is 38~42℃, the residue in the reactor completely dissolved, get the second mixed liquid; S4, the configuration of the foam dust fall solution: the second mixed liquid 12~18min after standing step S3 to make it completely stable, take 2~15 parts by weight of the foam durable agent added to the second mixed liquid after standing and mixing stirring at 100~120r / min speed, stirring time 10~15min, the stirring temperature is 36~45℃, the mixture is completely dissolved and standing 8~12min, get the foam dust fall solution; S5, the performance verification of the foam dust fall solution: the foam dust fall solution obtained in step S4 is not more than 48 hours, then the sample of the foam dust fall solution is taken, and the sample is placed into a discrete foam generator to evaluate the foam generation density, spray distance and foam stability. If the foam generation density exceeds the density threshold value, and the spray distance is greater than the distance threshold value, and the foam life is higher than the life threshold value, the performance of the foam dust fall solution meets the standard, and step S6 is performed. If any one of the foam generation density, the spray distance and the foam life is lower than the set density threshold value, distance threshold value or life threshold value, the solution is discarded, and step S1 is performed again. The density threshold value is 595~605 / minute, the distance threshold value is 0.9~1.2 meters, and the life threshold value is 28~32 seconds; S6, the configuration of the foam dust suppression and dust fall composition: take 0.4~1 parts by weight of the dust suppressant and add it to the foam dust fall solution obtained in step S4, stir for 10~15min until it is completely dissolved, and then stand at room temperature for 12~20h to obtain the final composition with dual functions of dust suppression and dust fall.

4. The production method according to claim 3, characterized by, In step S5, the step S1 is performed again by adjusting the specific values of the parameters within the ranges set in steps S1, S2, S3 and / or S4. The stirring temperature in step S6 is 60~80℃.

5. The production method according to claim 3, characterized by, The contact angle of the prepared composition with dual functions of dust suppression and dust fall measured by using quartz sand, limestone powder or coal powder as the substrate is less than 18°; the mass loss of the composition after 3 hours of wind erosion resistance is less than 1.5wt.%; and the average life of the generated foam is greater than 48s.

6. The production method according to claim 5, characterized by, The wind erosion resistance medium used for the wind erosion resistance is one or more of quartz sand, limestone powder or coal powder.

7. A method for applying a composition having a dual function of dust suppression and dust reduction, characterized in that, The application method is to use the composition with dual functions of dust suppression and dust fall prepared by the preparation method of any one of claims 3~6 to spray the escaping dust in the form of foam at a flow rate of 0.7~1.5L / min in the mining industry, port, industrial production or tunnel construction where dust exists.

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