CN113717403B - Multifunctional gel for inhibiting dust emission of coal pile and preventing spontaneous combustion and preparation method thereof - Google Patents
Multifunctional gel for inhibiting dust emission of coal pile and preventing spontaneous combustion and preparation method thereof Download PDFInfo
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- CN113717403B CN113717403B CN202110959387.3A CN202110959387A CN113717403B CN 113717403 B CN113717403 B CN 113717403B CN 202110959387 A CN202110959387 A CN 202110959387A CN 113717403 B CN113717403 B CN 113717403B
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- 239000003245 coal Substances 0.000 title claims abstract description 34
- 239000000428 dust Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 21
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 13
- 238000009841 combustion method Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 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 claims abstract description 30
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 30
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims abstract description 30
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims abstract description 30
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 21
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 19
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 claims abstract description 17
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 239000012153 distilled water Substances 0.000 claims abstract description 10
- 239000000080 wetting agent Substances 0.000 claims abstract description 10
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 9
- 239000003999 initiator Substances 0.000 claims abstract description 9
- 239000011259 mixed solution Substances 0.000 claims description 33
- -1 alkylbenzene sulfonate Chemical class 0.000 claims description 13
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical group C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000005909 Kieselgur Substances 0.000 claims description 2
- GBRBMTNGQBKBQE-UHFFFAOYSA-L copper;diiodide Chemical compound I[Cu]I GBRBMTNGQBKBQE-UHFFFAOYSA-L 0.000 claims description 2
- 239000002817 coal dust Substances 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 230000002265 prevention Effects 0.000 abstract description 5
- 230000001629 suppression Effects 0.000 abstract description 5
- 230000002829 reductive effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000499 gel Substances 0.000 abstract 4
- 238000004090 dissolution Methods 0.000 description 4
- 238000007334 copolymerization reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- KWKXNDCHNDYVRT-UHFFFAOYSA-N dodecylbenzene Chemical compound CCCCCCCCCCCCC1=CC=CC=C1 KWKXNDCHNDYVRT-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 206010035653 pneumoconiosis Diseases 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 208000023504 respiratory system disease Diseases 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/075—Macromolecular gels
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B15/00—Preparation of other cellulose derivatives or modified cellulose, e.g. complexes
- C08B15/05—Derivatives containing elements other than carbon, hydrogen, oxygen, halogens or sulfur
- C08B15/06—Derivatives containing elements other than carbon, hydrogen, oxygen, halogens or sulfur containing nitrogen, e.g. carbamates
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2301/08—Cellulose derivatives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/41—Compounds containing sulfur bound to oxygen
- C08K5/42—Sulfonic acids; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
Abstract
The invention discloses a multifunctional gel for inhibiting dust emission of a coal pile and preventing spontaneous combustion and a preparation method thereof, and relates to the technical field of multifunctional gels, wherein the preparation raw materials comprise the following components in percentage by weight: 1-3 parts of sodium carboxymethylcellulose; 1-3 parts of itaconic acid; 2-6 parts of diethylenetriamine; 0.1-0.4 part of initiator; 0.1-0.4 part of cross-linking agent; 5-15 parts of diatomite; 4-10 parts of sodium silicate; 0.1-0.3 part of wetting agent; the balance distilled water. The invention has the advantages of easily available raw materials, simple preparation process, low cost and easy industrialized production; the multifunctional gel prepared by the invention has multifunction, and the two performances of dust suppression and fire prevention can also cooperate with each other, the water absorption can improve the viscosity, and the fly of coal dust can be reduced while the coal dust is bonded; the gel is mixed with sodium silicate, so that the risk of spontaneous combustion of coal can be effectively reduced, and a good fireproof effect is achieved.
Description
Technical Field
The invention relates to the technical field of multifunctional gel, in particular to a gel of a multifunctional gel for inhibiting dust emission of coal piles and preventing spontaneous combustion and a preparation method thereof.
Background
At present, during the process of stacking coal, a great amount of dust is always generated in the coal pile due to the irresistible natural and artificial reasons, and even the coal self-ignition phenomenon occurs in the coal body along with the stacking time and the change of the external environment. The coal dust phenomenon and the coal spontaneous combustion problem are huge harm to the coal production industry.
The harm caused by the dust phenomenon of coal is as follows: irreversible respiratory diseases to humans, such as pneumoconiosis; fine coal dust can infiltrate into the machine to influence the service life of the equipment; more dangerous is that coal dust is prone to dust explosion, and the consequences are not estimated. In addition, the problem of spontaneous combustion of coal aggravates the dust emission phenomenon of coal, so that both the two hazards are huge.
In order to reduce the dust emission phenomenon of the coal pile, operators can spray water periodically to inhibit dust emission, but the water consumption is very low, because the independent water is sprayed, the dust fall and dust suppression time is short, and the waste of water resources can be caused. At present, an effective means for preventing and treating dust is to spread a layer of greening film on the surface of a coal pile, but the risk of spontaneous combustion of coal is inevitably increased.
Therefore, there is an urgent need to develop a substance capable of realizing the combination of dust suppression and fire prevention, which can effectively reduce the dust emission problem and reduce the risk of spontaneous combustion of coal.
Disclosure of Invention
The invention discloses a multifunctional gel for inhibiting dust emission of a coal pile and preventing spontaneous combustion and a preparation method thereof, aiming at solving the technical problems of dust emission and spontaneous combustion of coal inevitably occurring in the process of stacking open-air coal.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the multifunctional gel for inhibiting dust emission and preventing spontaneous combustion of coal pile is prepared from sodium carboxymethyl cellulose, itaconic acid, diethylenetriamine, initiator, cross-linking agent, diatomite, sodium silicate and wetting agent.
Further, the preparation raw materials comprise the following components in percentage by weight:
1-3 parts of sodium carboxymethylcellulose;
1-3 parts of itaconic acid;
2-6 parts of diethylenetriamine;
0.1-0.4 part of initiator;
0.1-0.4 part of cross-linking agent;
5-15 parts of diatomite;
4-10 parts of sodium silicate;
0.1-0.3 part of wetting agent;
the balance distilled water.
Further, the initiator is copper diiodoate.
Further, the cross-linking agent is N, N' -methylenebisacrylamide.
Further, the wetting agent is a heavy alkylbenzene sulfonate.
Further, in the preparation process of the multifunctional gel, the raw materials are as follows:
sodium carboxymethyl cellulose: itaconic acid: diethylenetriamine=1:1:2;
copper diperoxodide: n, N' -methylenebisacrylamide=2:3;
diatomaceous earth: sodium silicate = 3:2;
heavy alkylbenzene sulfonate: water=1:1000.
Further, in the preparation process, under the condition of 200 milliliters of distilled water, the weight of each raw material is as follows:
2g of sodium carboxymethylcellulose;
2g of itaconic acid;
4g of diethylenetriamine;
0.2g of copper diperoxodide;
0.3g of N, N' -methylenebisacrylamide;
2g of diatomite;
8g of sodium silicate;
0.2g of heavy alkylbenzene sulfonate.
Further, the preparation method of the multifunctional gel specifically comprises the following steps:
s1: distilled water is added into a three-neck flask, a certain amount of sodium carboxymethylcellulose is filled into the three-neck flask, nitrogen is introduced, and the sodium carboxymethylcellulose solution is obtained by dissolving at the temperature of 60 ℃;
s2: cooling the sodium carboxymethyl cellulose solution to 40 ℃, sequentially adding a certain amount of itaconic acid and diethylenetriamine, adding a certain amount of copper diiodide, and heating in a water bath for 0.5h to obtain a mixed solution I;
s3: adding a certain amount of diatomite and sodium silicate into the mixed solution I, and fully and uniformly mixing to obtain a mixed solution II;
s4: adding a certain amount of N, N' -methylene bisacrylamide into the mixed solution II, and continuously heating in a water bath for 0.5h to obtain a mixed solution III;
s5: and after the mixed solution III is cooled to room temperature, adding a certain amount of heavy alkylbenzene sulfonate to obtain the multifunctional gel.
In the process of preparing the multifunctional gel, the selected raw materials have the following characteristics:
sodium carboxymethyl cellulose is a natural polymer material and widely exists in large spontaneous combustion.
The initiator copper diiodoate is a metal oxide that reacts with the strong oxidizing properties of trivalent copper ions.
Crosslinking agent N, N' -methylene bisacrylamide.
The heavy alkylbenzene sulfonate is used as a wetting agent, is Heavy Alkylbenzene (HAB), is a byproduct in the process of producing dodecylbenzene, has the advantages of good low-temperature fluidity and low solidifying point, can cope with cold climatic conditions in the north, and can improve the wetting of the gel to coal piles by utilizing the good wettability.
Diatomite is used as water absorbent and is a material with abundant empty structure, and the pore volume reaches 0.45-0.98m 3 The specific surface area per gram reaches 40-65 square meters per gram, and dust can be effectively adsorbed; and it is strong in water-absorbing property,the water absorption rate is 2-4 times of the volume of the gel, and the water absorption of the gel can be improved.
Sodium silicate is used as a fire retardant, has excellent fire resistance, and by utilizing the characteristic of water solubility, sodium silicate is mixed in the gel preparation process, so that the fire resistance of the gel is improved, the cohesiveness and the corrosion resistance of the gel are improved, and the service life of the gel is prolonged.
The reaction equation of the graft copolymerization reaction of sodium carboxymethyl cellulose, itaconic acid and diethylenetriamine in the invention is as follows:
the invention has the beneficial effects that the sodium carboxymethyl cellulose, the itaconic acid and the diethylenetriamine are adopted for graft copolymerization, and the modified product obtained after copolymerization is mixed with water absorbent (diatomite), fire retardant (sodium silicate) and wetting agent (heavy alkylbenzenesulfonate), so that the gel has good viscosity and excellent water absorption.
The raw materials selected in the invention are easy to obtain, the preparation process is simple, the cost is low, and the industrial production is easier.
The prepared multifunctional gel has good water absorbability, can effectively adsorb water sprayed manually, combines good viscosity, and can form a layer of compact protective film on the surface of a coal pile to prevent flying of coal dust.
Because the multifunctional gel has good water absorbability, sodium silicate is mixed in the gel, the risk of spontaneous combustion of coal can be effectively reduced, and a good fireproof effect is achieved.
In conclusion, the multifunctional gel prepared by the invention has multifunction, and the two performances of dust suppression and fire prevention can also cooperate with each other, so that the water absorption can improve the viscosity, and the flying of coal dust can be reduced while the coal dust is bonded.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention discloses a multifunctional gel for inhibiting dust emission of coal piles and preventing spontaneous combustion, which comprises the following raw materials of sodium carboxymethyl cellulose, itaconic acid, diethylenetriamine, an initiator (copper diiodoate), a cross-linking agent (N, N' -methylene bisacrylamide), diatomite, sodium silicate and a wetting agent (heavy alkylbenzene sulfonate).
Example 1
The preparation method of the multifunctional gel for inhibiting dust emission and preventing spontaneous combustion of the coal pile comprises the following steps:
(1) 200ml of distilled water is added into a three-neck flask, 2g of sodium carboxymethylcellulose is filled into the three-neck flask, nitrogen is introduced, and the sodium carboxymethylcellulose solution is obtained by dissolution at the temperature of 60 ℃;
(2) Cooling the sodium carboxymethyl cellulose solution to 40 ℃, sequentially adding 1g of itaconic acid and 2g of diethylenetriamine, then adding 0.2g of copper diiodoate, and heating in a water bath for 0.5h to obtain a mixed solution I;
(3) Adding 12g of diatomite and 8g of sodium silicate into the mixed solution I, and fully and uniformly mixing to obtain a mixed solution II;
(4) Adding 0.3g of N, N' -methylene bisacrylamide into the mixed solution II, and continuing to heat for 0.5h in a water bath to obtain a mixed solution III;
(5) After the mixed solution III was cooled to room temperature, 0.2g of a heavy alkylbenzene sulfonate was added to prepare the multifunctional gel, which was designated as gel sample 1.
Example 2
The preparation method of the multifunctional gel for inhibiting dust emission and preventing spontaneous combustion of the coal pile comprises the following steps:
(1) 200ml of distilled water is added into a three-neck flask, 2g of sodium carboxymethylcellulose is filled into the three-neck flask, nitrogen is introduced, and the sodium carboxymethylcellulose solution is obtained by dissolution at the temperature of 60 ℃;
(2) Cooling the sodium carboxymethyl cellulose solution to 40 ℃, sequentially adding 3g of itaconic acid and 6g of diethylenetriamine, then adding 0.2g of copper diiodoate, and heating in a water bath for 0.5h to obtain a mixed solution I;
(3) Adding 12g of diatomite and 8g of sodium silicate into the mixed solution I, and fully and uniformly mixing to obtain a mixed solution II;
(4) Adding 0.3g of N, N' -methylene bisacrylamide into the mixed solution II, and continuing to heat for 0.5h in a water bath to obtain a mixed solution III;
(5) After the mixture III was cooled to room temperature, 0.2g of a heavy alkylbenzene sulfonate was added to prepare the multifunctional gel, which was designated as gel sample 2.
Example 3
The preparation method of the multifunctional gel for inhibiting dust emission and preventing spontaneous combustion of the coal pile comprises the following steps:
(1) 200ml of distilled water is added into a three-neck flask, 2g of sodium carboxymethylcellulose is filled into the three-neck flask, nitrogen is introduced, and the sodium carboxymethylcellulose solution is obtained by dissolution at the temperature of 60 ℃;
(2) Cooling the sodium carboxymethyl cellulose solution to 40 ℃, sequentially adding 2g of itaconic acid and 4g of diethylenetriamine, then adding 0.2g of copper diiodoate, and heating in a water bath for 0.5h to obtain a mixed solution I;
(3) Adding 8g of diatomite and 4g of sodium silicate into the mixed solution I, and fully and uniformly mixing to obtain a mixed solution II;
(4) Adding 0.3g of N, N' -methylene bisacrylamide into the mixed solution II, and continuing to heat for 0.5h in a water bath to obtain a mixed solution III;
(5) After the mixture III was cooled to room temperature, 0.2g of a heavy alkylbenzene sulfonate was added to prepare the multifunctional gel, which was designated as gel sample 3.
Example 4
The preparation method of the multifunctional gel for inhibiting dust emission and preventing spontaneous combustion of the coal pile comprises the following steps:
(1) 200ml of distilled water is added into a three-neck flask, 2g of sodium carboxymethylcellulose is filled into the three-neck flask, nitrogen is introduced, and the sodium carboxymethylcellulose solution is obtained by dissolution at the temperature of 60 ℃;
(2) Cooling the sodium carboxymethyl cellulose solution to 40 ℃, sequentially adding 2g of itaconic acid and 4g of diethylenetriamine, then adding 0.2g of copper diiodoate, and heating in a water bath for 0.5h to obtain a mixed solution I;
(3) Adding 12g of diatomite and 8g of sodium silicate into the mixed solution I, and fully and uniformly mixing to obtain a mixed solution II;
(4) Adding 0.3g of N, N' -methylene bisacrylamide into the mixed solution II, and continuing to heat for 0.5h in a water bath to obtain a mixed solution III;
(5) After the mixture III was cooled to room temperature, 0.2g of a heavy alkylbenzene sulfonate was added to prepare the multifunctional gel, which was designated as gel sample 4.
The multifunctional gel prepared in examples 1 to 4 was subjected to a water retention test.
The testing method comprises the following steps: the four gel samples prepared were placed in a drying oven at 60℃respectively, and their initial masses were weighed to be m 1 . Then, they were tested every 1h for quality, using m 2 The gel retention rate was represented as W.
The test results of the four gel samples are shown in table 1 below.
TABLE 1
The water retention rate calculation formula is:
W(g/g)＝(m 2 /m 1 )×100％
in the above, m 1 Initial mass (in g) of gel; m is m 2 The water retention rate W (unit g/g) is the mass (unit g) of the gel after water loss at different times.
Therefore, the invention can detect the water retention rate of the prepared multifunctional gel by setting different proportions, thereby judging the actual dust suppression and fire prevention effects of the gel.
When the multifunctional gel prepared by the invention is smeared or sprayed on an open-air piled coal pile, the water sprayed manually can be effectively adsorbed by utilizing the excellent water absorbability of the gel, and a compact protective film can be formed on the surface of the coal pile by combining with the good viscosity of the gel so as to prevent coal dust from flying. In addition, because the gel with good water absorption is mixed with sodium silicate, the gel can also play a good role in fire prevention.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (2)
1. The preparation method of the multifunctional gel for inhibiting dust emission and preventing spontaneous combustion of coal piles is characterized in that the preparation raw materials of the multifunctional gel comprise sodium carboxymethyl cellulose, itaconic acid, diethylenetriamine, an initiator, a cross-linking agent, diatomite, sodium silicate and a wetting agent;
the preparation raw materials comprise the following components in parts by weight:
1-3 parts of sodium carboxymethylcellulose;
1-3 parts of itaconic acid;
2-6 parts of diethylenetriamine;
0.1-0.4 part of initiator;
0.1-0.4 part of cross-linking agent;
5-15 parts of diatomite;
4-10 parts of sodium silicate;
0.1-0.3 part of wetting agent;
heavy alkylbenzene sulfonate: distilled water=1:1000;
the initiator is copper diperoxodide;
the cross-linking agent is N, N' -methylene bisacrylamide;
the wetting agent is a heavy alkylbenzene sulfonate;
the preparation process specifically comprises the following steps:
s1: distilled water is added into a three-neck flask, a certain amount of sodium carboxymethylcellulose is filled into the three-neck flask, nitrogen is introduced, and the sodium carboxymethylcellulose solution is obtained by dissolving at the temperature of 60 ℃;
s2: cooling the sodium carboxymethyl cellulose solution to 40 ℃, sequentially adding a certain amount of itaconic acid and diethylenetriamine, then adding a certain amount of copper diiodide, and heating in a water bath for 0.5h to obtain a mixed solution I;
s3: adding a certain amount of diatomite and sodium silicate into the mixed solution I, and fully and uniformly mixing to obtain a mixed solution II;
s4: adding a certain amount of N, N' -methylene bisacrylamide into the mixed solution II, and continuously heating in a water bath for 0.5h to obtain a mixed solution III;
s5: and after the mixed solution III is cooled to room temperature, adding a certain amount of heavy alkylbenzene sulfonate to obtain the multifunctional gel.
2. The method for preparing the multifunctional gel for inhibiting dust emission and preventing spontaneous combustion of coal pile according to claim 1, wherein the preparation process of the multifunctional gel is characterized in that the raw materials comprise the following components in proportion:
sodium carboxymethyl cellulose: itaconic acid: diethylenetriamine=1:1:2;
copper diperoxodide: n, N' -methylenebisacrylamide=2:3;
diatomaceous earth: sodium silicate=3:2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110959387.3A CN113717403B (en) | 2021-08-20 | 2021-08-20 | Multifunctional gel for inhibiting dust emission of coal pile and preventing spontaneous combustion and preparation method thereof |
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| CN202110959387.3A CN113717403B (en) | 2021-08-20 | 2021-08-20 | Multifunctional gel for inhibiting dust emission of coal pile and preventing spontaneous combustion and preparation method thereof |
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| CN113717403A CN113717403A (en) | 2021-11-30 |
| CN113717403B true CN113717403B (en) | 2023-12-26 |
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| CN202110959387.3A Active CN113717403B (en) | 2021-08-20 | 2021-08-20 | Multifunctional gel for inhibiting dust emission of coal pile and preventing spontaneous combustion and preparation method thereof |
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