CN114621730A - Dust suppressant and preparation method thereof - Google Patents
Dust suppressant and preparation method thereof Download PDFInfo
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- CN114621730A CN114621730A CN202210270537.4A CN202210270537A CN114621730A CN 114621730 A CN114621730 A CN 114621730A CN 202210270537 A CN202210270537 A CN 202210270537A CN 114621730 A CN114621730 A CN 114621730A
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- 239000000428 dust Substances 0.000 title claims abstract description 82
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 239000000126 substance Substances 0.000 claims abstract description 18
- 239000000835 fiber Substances 0.000 claims abstract description 15
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims abstract description 11
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims abstract description 11
- 229920002472 Starch Polymers 0.000 claims abstract description 10
- 239000008107 starch Substances 0.000 claims abstract description 10
- 235000019698 starch Nutrition 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims abstract description 8
- 230000001070 adhesive effect Effects 0.000 claims abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000010902 straw Substances 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 239000003945 anionic surfactant Substances 0.000 claims description 8
- 238000004880 explosion Methods 0.000 claims description 8
- 241000196324 Embryophyta Species 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 229920001592 potato starch Polymers 0.000 claims description 5
- FDRCDNZGSXJAFP-UHFFFAOYSA-M sodium chloroacetate Chemical compound [Na+].[O-]C(=O)CCl FDRCDNZGSXJAFP-UHFFFAOYSA-M 0.000 claims description 5
- 239000002657 fibrous material Substances 0.000 claims description 4
- 229940045944 sodium lauroyl glutamate Drugs 0.000 claims description 4
- IWIUXJGIDSGWDN-UQKRIMTDSA-M sodium;(2s)-2-(dodecanoylamino)pentanedioate;hydron Chemical group [Na+].CCCCCCCCCCCC(=O)N[C@H](C([O-])=O)CCC(O)=O IWIUXJGIDSGWDN-UQKRIMTDSA-M 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 abstract description 7
- 239000001768 carboxy methyl cellulose Substances 0.000 abstract description 7
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 abstract description 7
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 abstract description 7
- 229920002488 Hemicellulose Polymers 0.000 abstract description 6
- 229920005610 lignin Polymers 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 229920002678 cellulose Polymers 0.000 abstract description 2
- 239000001913 cellulose Substances 0.000 abstract description 2
- 150000002500 ions Chemical class 0.000 abstract description 2
- 230000004584 weight gain Effects 0.000 abstract description 2
- 235000019786 weight gain Nutrition 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 16
- 238000001179 sorption measurement Methods 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000012855 volatile organic compound Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 4
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 240000008042 Zea mays Species 0.000 description 3
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 3
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 3
- 239000002775 capsule Substances 0.000 description 3
- 235000005822 corn Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229960000907 methylthioninium chloride Drugs 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 101100444286 Caenorhabditis elegans dyc-1 gene Proteins 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 241000167847 Koelreuteria paniculata Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/22—Materials not provided for elsewhere for dust-laying or dust-absorbing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention provides a dust suppressant and a preparation method thereof, belonging to the technical field of environmental protection. The liquid fiber substance for preparing the dust suppressant contains lignin, sodium carboxymethyl cellulose, hemicellulose and the like in a specific ratio, wherein the contained sodium carboxymethyl cellulose can play a role in water retention and film formation in the dust suppressant and can be combined with dust particles to form a fiber water film on the surfaces of the dust particles so as to increase the weight of the dust particles and fall to the ground; the lignin contained in the dust can assist the starch adhesive and the sodium polyacrylate to be matched with the surface of the dust particles with the cellulose water film for incrustation again, so that the weight gain of the dust particles is reduced to the ground; the hemicellulose has a certain function of binding ions and can be combined with dust particles with charges to increase the wettability of the dust particles.
Description
Technical Field
The invention relates to a dust suppressant for haze treatment, in particular to a dust suppressant and a preparation method thereof.
Background
The haze mainly comprises sulfur dioxide, nitrogen oxide volatile fusible glue, inhalable particle suspended particles and the like. Haze can make the atmosphere cloudy, especially in recent years, frequently and appear large tracts of land haze weather or haze environment on a large scale for a long time, cause environmental pollution, direct influence people's is healthy, consequently solves the haze pollution in the air and has become current big livelihood problem. At present, the haze is mainly treated by adopting the steps of limiting industrial production and sprinkling for dust suppression, and hydrophilic fine particles in air are absorbed by water and fall to the ground. However, water cannot absorb hydrophobic air-floating substances in the air, and the absorbed hydrophilic fine particles can be lifted again after falling to the ground and dispersed in the air, so that the method has poor haze removal effect and high treatment cost.
Disclosure of Invention
In order to solve the problems, the invention provides a dust suppressant and a preparation method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a dust suppressant is prepared from the raw materials of active ingredients of the dust suppressant in parts by weight: 60-70 parts of liquid fiber substance, 15-20 parts of starch adhesive, 0.5-1 part of sodium polyacrylate and 5-10 parts of anionic surfactant.
Further, the preparation process of the liquid fiber substance comprises the steps of carrying out flash explosion and crushing on plant straws, adding the obtained straw powder, sodium chloroacetate and a sodium hydroxide aqueous solution into ethanol at one time, carrying out carboxymethylation reaction and alkalization reaction at room temperature, adjusting the pH value to 6.0-6.5 after the carboxymethylation reaction and the alkalization reaction are finished, and filtering to obtain filtrate, namely the liquid fiber substance.
Further, the pressure of flash explosion is 0.9-1.2 MPa, and the time is 3-4 min.
Further, the weight ratio of the straw powder to sodium chloroacetate to sodium hydroxide in the sodium hydroxide aqueous solution is 1: 1.1-1.2: 0.4 to 0.45.
Furthermore, the content of sodium hydroxide in the sodium hydroxide aqueous solution is 25-30 wt%.
Further, the weight volume ratio of the straw powder to the ethanol is 1 kg: 7-8L.
Further, the time of carboxymethylation reaction and alkalization reaction is 1-2 h.
Further, the anionic surfactant is sodium lauroyl glutamate; the starch adhesive is potato starch or potato starch.
A method for preparing dust suppressant comprises directly adding starch binder and sodium polyacrylate into liquid fiber material, mixing, and adding anionic surfactant to obtain the dust suppressant;
the rotational viscosity of the dust suppressant is 400-500 mp.s;
sodium polyacrylate at 40% level and rotational viscosity of 20 mp.s.
Further, the dust suppressant is dried to obtain the solid dust suppressant.
The dust suppressant and the preparation method thereof have the beneficial effects that:
the liquid fiber substance for preparing the dust suppressant contains lignin, sodium carboxymethyl cellulose, hemicellulose and the like in a specific ratio, wherein the contained sodium carboxymethyl cellulose can play a role in water retention and film formation in the dust suppressant and can be combined with dust particles to form a fiber water film on the surfaces of the dust particles so as to increase the weight of the dust particles and fall to the ground; the lignin contained in the dust can assist the starch adhesive and the sodium polyacrylate to be matched with the surface of the dust particles with the cellulose water film for incrustation again, so that the weight gain of the dust particles is reduced to the ground; the hemicellulose has a certain function of binding ions, can be bound with dust particles with charges, and increases the wettability of the dust particles;
meanwhile, the liquid fiber substance can also play a role in solidification, water absorption and bonding;
the liquid fiber substance adopted by the invention is directly prepared from plant straws, is green and environment-friendly, and is non-toxic and pollution-free; the liquid fiber substance prepared by the invention can be directly used for preparing the dust suppressant without purification;
the starch adhesive and the sodium polyacrylate are matched with each other and jointly used as the adhesive, so that the coated dust particles are solidified and hardened after dehydration, and the dust is prevented from being raised again;
according to the invention, by adding the anionic surfactant, the combination of the dust suppressant and the dust particles with electrons can be effectively increased, and the wetting effect is achieved, and the anionic surfactant adopts sodium lauroyl glutamate, so that the wetting property is proper, the biodegradability is good, the environment friendliness is realized, and no pollution is caused;
the method adjusts process parameters, prepares the liquid fiber substance by directly carrying out flash explosion, alkalization and other steps on plant straws, and directly prepares the dust suppressant by the obtained liquid fiber substance (filtrate) without drying and separating lignin, sodium carboxymethylcellulose and hemicellulose;
because the water content has influence on the carboxymethylation degree, the invention controls the water content in the plant straws after flash explosion by adjusting the flash explosion pressure and time, controls the carboxymethylation reaction degree by adjusting the concentration and the dosage of the sodium hydroxide aqueous solution, and further controls the proportion among lignin, sodium carboxymethylcellulose and hemicellulose in the obtained liquid fiber substance.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
EXAMPLE 1 preparation of a dust suppressant
The embodiment is a preparation method of a dust suppressant, which comprises the following steps in sequence:
1) taking corn straws (generally the corn straws with the water content of 12-15%) to perform flash explosion for 3.5min under the pressure of 1.0MPa, and then crushing the corn straws without drying to obtain a certain wet straw powder.
2) Adding 10kg of straw powder into 75L of ethanol, adding 11.5kg of sodium chloroacetate, stirring and mixing uniformly, adding 14kg of 28.57 wt% sodium hydroxide aqueous solution (containing 4kg of sodium hydroxide), stirring at room temperature while performing carboxymethylation reaction and alkalization reaction, after reacting for 1.5h, adjusting the pH value to 6.0 by using a small amount of 10 wt% hydrochloric acid, and filtering to obtain filtrate, namely liquid fiber substance, wherein the label is M1.
3) Taking 65kg of liquid fiber material M1, directly adding 20kg of potato starch and 0.5kg of sodium polyacrylate (the content of sodium polyacrylate is 40%, and the rotational viscosity is 20mp.s liquid), fully stirring and uniformly mixing, then adding 7kg of sodium lauroyl glutamate, stirring and uniformly mixing to obtain the liquid dust suppressant with the rotational viscosity of 450mp.s, and marking as N1.
And drying the liquid dust suppressant N1 to obtain a solid dust suppressant, which is marked as YC 1.
The solid dust suppressant can be re-used as a liquid dust suppressant after re-dissolution.
EXAMPLES 2 TO 6 preparation method of dust suppressant
Examples 2 to 6 are methods for preparing dust suppressants, respectively, the steps of which are substantially the same as those of example 1, except for the differences in the amounts of raw materials and process parameters, and are specifically shown in table 1:
TABLE 1 summary of the process parameters of examples 2 to 6
The contents of the other portions of examples 2 to 6 are the same as those of example 1.
Experimental example 1 Performance measurement of dust suppressant
Comparative examples 1 to 4 are comparative tests of the dust suppressant preparation process in example 1, differing only in that:
in comparative example 1, a 2.5 wt% aqueous solution of sodium carboxymethylcellulose was used in place of the liquid fibrous material, the obtained liquid dust suppressant was designated as DN1, and dried to obtain a solid dust suppressant DYC 1;
drying the straw powder in the step 1) of the comparative example 2, and then using the straw powder in the step 2), wherein the obtained liquid dust suppressant is marked as DN2, and drying to obtain a solid dust suppressant DYC 2;
adjusting the pH value to 5.0 in the step 2) of the comparative example 3, marking the obtained liquid dust suppressant as DN3, and drying to obtain a solid dust suppressant DYC 3;
in the step 2) of the comparative example 4, the pH value was adjusted to 7.5, the sodium polyacrylate and the starch binder were deteriorated, the obtained liquid dust suppressant was designated as DN4, and the solid dust suppressant was dried and obtained as DYC 4.
A cooperative unit was entrusted with adsorption performance tests using the solid dust suppressants YC 1-YC 6 prepared in examples 1-6 and the liquid dust suppressants DYC 1-DYC 4 prepared in comparative examples 1-4, the adsorption tests were conducted on a fixed bed continuous flow reaction apparatus simulating flue gas (SO) in which the main harmful components of haze were sulfur oxides and their formed particles, volatile organic compounds and their formed particles2) VOCs generator, water vapor generator tee bend control, the constant temperature adsorption bed system of flowing through, by the quartz capsule reactor promptly, the quartz capsule both ends are sealed fixed with the rubber stopper that has inserted the pipeline, desulfurizer both ends are supported with the glass cotton in the quartz capsule, reaction temperature is measured control by the thermocouple, import and export volume content is controlled by rotameter by valve control gas passage, VOCs export flow is detected by gas chromatograph, wherein, simulation flue gas control sulfur dioxide, rotameter survey sulfur dioxide adsorption rate, gas chromatography survey methylene blue adsorption rate.
The adsorption performance test is carried out under the conditions of room temperature and normal pressure, the gas is controlled to enter the types and the flow rate through the reaction devices respectively, sulfur dioxide and water vapor in the device are opened simultaneously to control the flow rate of the sulfur dioxide, the sulfur dioxide flows through the adsorption device (a solid dust suppressant to be tested in the adsorption device), the sulfur dioxide flows out from an outlet, the size of the sulfur dioxide flows out through a rotor flow meter, the adsorption quantity of harmful substances of the organic sol (methylene blue) is measured by the same method, and specific test results are shown in table 2. The volatile organic compounds of VOCs are chemically harmful organic substances in haze, and the methylene blue is one of the volatile organic compounds.
Table 2 summary of adsorption test results
| Group of | Sulfur dioxide treatment rate | Organic sol treatment rate | PM2.5 concentration value treatment rate | PM10 concentration value handling Rate |
| Example 1 | 95.8％ | 96.3％ | 92.7％ | 98.6％ |
| Example 2 | 92.7％ | 94.3％ | 90.4％ | 96.2％ |
| Example 3 | 93.4％ | 95.1％ | 90.9％ | 96.8％ |
| Example 4 | 94.1％ | 95.8％ | 91.3％ | 97.2％ |
| Example 5 | 94.6％ | 95.5％ | 92.4％ | 97.9％ |
| Example 6 | 95.3％ | 96.1％ | 92.5％ | 98.4％ |
| Comparative example 1 | 60.7％ | 52.4％ | 47.6％ | 65.9％ |
| Comparative example 2 | 82.4％ | 81.3％ | 80.7％ | 87.9％ |
| Comparative example 3 | 89.1％ | 90.7％ | 84.7％ | 90.2％ |
| Comparative example 4 | 60.1％ | 64.2％ | 57.6％ | 61.7％ |
As can be seen from Table 2, the solid dust suppressant prepared by the invention has good treatment effects on sulfur dioxide, organosol and the like, and can effectively treat haze of PM2.5 and PM 10.
Experimental example 2 spray test measurement of dust suppressant
In a certain haze day and different roads of the Koelreuteria paniculata city, the liquid dust suppressants N1-N6 prepared in examples 1-6 and the liquid dust suppressants DN 1-DN 4 prepared in comparative examples 1-4 are respectively diluted by 100 times and sprayed into the air, and PM2.5 numerical value tests of the environment are carried out before spraying, after spraying for 20min and 1h, and the specific values are shown in the following table:
table 3 summary of measurement results of spraying experiment
| Group of | PM2.5 before spraying | PM2.5 after spraying for 20min | PM2.5 after spraying for 1h |
| Example 1 | 217 | 20 | 21 |
| Example 2 | 214 | 21 | 23 |
| Example 3 | 216 | 22 | 24 |
| Example 4 | 212 | 18 | 20 |
| Example 5 | 216 | 23 | 25 |
| Example 6 | 213 | 21 | 22 |
| Comparative example 1 | 214 | 124 | 176 |
| Comparative example 2 | 217 | 87 | 125 |
| Comparative example 3 | 209 | 72 | 107 |
| Comparative example 4 | 216 | 147 | 169 |
As can be seen from Table 3, the liquid dust suppressant prepared by the invention can effectively treat haze of PM2.5, and cannot cause environmental pollution.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Claims (10)
1. The dust suppressant is characterized in that raw materials for preparing effective components of the dust suppressant comprise the following components in parts by weight: 60-70 parts of liquid fiber substance, 15-20 parts of starch adhesive, 0.5-1 part of sodium polyacrylate and 5-10 parts of anionic surfactant.
2. The dust suppressant according to claim 1, wherein the liquid fibrous substance is prepared by subjecting plant straws to flash explosion and pulverization, adding the obtained straw powder, sodium chloroacetate and aqueous sodium hydroxide solution into ethanol, performing carboxymethylation reaction and alkalization reaction at room temperature, adjusting pH value after completion of carboxymethylation reaction and alkalization reaction, and filtering to obtain the liquid fibrous substance.
3. A dust suppressant according to claim 2, wherein the pressure of flash explosion is 0.9-1.2 MPa and the time is 3-4 min.
4. A dust suppressant according to claim 2, wherein the weight ratio of straw powder to sodium chloroacetate to sodium hydroxide is 1: 1.1-1.2: 0.4 to 0.45.
5. A dust suppressing agent as defined in claim 2, wherein the content of sodium hydroxide in the aqueous sodium hydroxide solution is 25 to 30% by weight.
6. The dust suppressant of claim 2, wherein the weight-to-volume ratio of straw powder to ethanol is 1 kg: 7-8L.
7. A dust suppressant according to claim 2, wherein the time for carboxymethylation reaction and alkalization reaction is 1-2 h.
8. A dust suppressant according to any one of claims 1 to 7, characterized in that the anionic surfactant is sodium lauroyl glutamate; the starch adhesive is potato starch or potato starch.
9. The preparation method of the dust suppressant according to any one of claims 1 to 8, characterized in that the preparation method comprises the steps of directly adding starch binder and sodium polyacrylate into liquid fiber material, mixing uniformly, and adding anionic surfactant to obtain the dust suppressant.
10. A method of producing a dust suppressant according to claim 9, wherein the dust suppressant is dried to obtain a solid dust suppressant.
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