CN111117569A - Application method of dust suppressant - Google Patents

Application method of dust suppressant Download PDF

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Publication number
CN111117569A
CN111117569A CN201911353289.4A CN201911353289A CN111117569A CN 111117569 A CN111117569 A CN 111117569A CN 201911353289 A CN201911353289 A CN 201911353289A CN 111117569 A CN111117569 A CN 111117569A
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China
Prior art keywords
dust suppressant
dust
spraying
application method
diluent
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CN201911353289.4A
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CN111117569B (en
Inventor
徐连生
许灏
高江
孙健
赵虹
崔兆杰
崔媚华
杜冰峰
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Ansteel Mining Co Ltd
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Ansteel Mining Co Ltd
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    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H3/00—Applying liquids to roads or like surfaces, e.g. for dust control; Stationary flushing devices
    • E01H3/02—Mobile apparatus, e.g. watering-vehicles

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention aims to solve the problems of the application method of the existing dust suppressant and provides an application method of the dust suppressant. The application method comprises the following steps: 1) diluting the dust suppressant with water; 2) spraying clear water on the road surface by using a watering cart; 3) spraying dust suppressant diluent on a road; 4) and spraying dust suppressant diluent on the exposed ground surface at the periphery of the road. The dust suppressant used in the invention is a water-soluble bonding type dust suppressant, and the dust suppressant is sprayed after a layer of clear water is sprayed on the road surface in advance, so that on one hand, dust can be effectively infiltrated and the use effect of the dust suppressant is improved; on the other hand, hydrophilic groups in the dust suppressant molecules can be effectively combined with the wetted dust, so that the dust suppressant infiltration speed is greatly increased, the loss of the dust suppressant is reduced, and the dust suppression duration is obviously prolonged.

Description

Application method of dust suppressant
Technical Field
The invention belongs to the field of road dust control, and particularly relates to an application method of a dust suppressant for an open mine road.
Background
According to investigation, in the automobile transportation operation of strip mines in China, the automobile dust production intensity is the first of all strip mining operations, the automobile dust production intensity is the largest dust pollution source of the strip mines, and the dust emission amount accounts for 70% -90% of the total dust production amount of the whole mine. Dust is more easily generated due to rolling compaction of a heavy truck in the mine ore transportation process.
In the using process of the surface mine pavement dust suppressant, as most of the dust suppressant has certain viscosity compared with clear water, the dust suppressant is easy to run off in the using process, and the lost dust suppressant is accumulated together, so that the friction force of dust in an accumulation area can be greatly reduced. For a mining area transportation road, most vehicles are dozens of tons of large trucks, the potential safety hazard in the transportation process of the vehicles can be greatly increased due to the reduction of local friction of the road, and the occurrence of traffic accidents is increased, so that the dust suppressant needs to be reduced as much as possible in the use process.
The currently developed dust suppressant patents are all focused on the research, development and preparation of the formula. Chinese patent CN108192569B discloses a dust suppressant, a preparation method, a use method and application thereof, relating to the environmental protection field of dust control. The invention focuses on the preferable proportion and preparation mode of each component of the dust suppressant, and does not relate to the operation method of the dust suppressant during specific use and the use amount of the dust suppressant during application.
Therefore, there is a need for research on methods of applying dust suppressants.
Disclosure of Invention
The invention aims to solve the problems of the application method of the existing dust suppressant and provides an application method of the dust suppressant. The dust suppressant used in the invention is a water-soluble bonding type dust suppressant, and the dust suppressant is sprayed after a layer of clear water is sprayed on the road surface in advance, so that on one hand, dust can be effectively infiltrated and the use effect of the dust suppressant is improved; on the other hand, hydrophilic groups in the dust suppressant molecules can be effectively combined with the wetted dust, so that the dust suppressant infiltration speed is greatly increased, the loss of the dust suppressant is reduced, and the dust suppression duration is obviously prolonged.
An application method of a dust suppressant comprises the following steps:
1) diluting the dust suppressant by 2-10 times by weight with water to obtain dust suppressant diluent;
2) spraying 0.1-0.8L/m on the road surface2The pavement is fully soaked by the clean water;
3) spraying dust suppressant diluent on a road, wherein the spraying amount of the dust suppressant diluent is 0.7-1.5L/m2；
4) Spraying dust suppressant diluent to the exposed ground surface around the road, wherein the spraying amount is 1-2.5L/m2。
In the method, a spraying vehicle is adopted to spray clear water in the step 2), and the speed of the spraying vehicle is 5-15 km/h.
In the method, a spraying vehicle is adopted to spray the dust suppressant diluent in the step 3), and the spraying speed is 4-10 km/h.
In the method, the dust suppressant comprises the following raw materials in percentage: 0.1-1% of humectant, 2-5% of polyvinyl alcohol, 0.5-9% of binder, 1-5% of surfactant and the balance of water.
In the method, the preparation method of the dust suppressant comprises the following steps:
1) preparing raw materials according to the mass fraction ratio of the raw materials, dividing water into A, B parts, heating the A part to 70-80 ℃, and heating the B part to 40-50 ℃, wherein the A: the mass ratio of B is 1: 1.5-2;
2) adding a surfactant into the part A for dissolving, adding a binder after uniformly stirring, and stirring at 50-100 rpm/min for 30-50 min to obtain an aqueous solution a;
3) adding polyvinyl alcohol into the part B, uniformly stirring, adding a humectant, and stirring at 50-100 rpm/min for 15-30 min to obtain an aqueous solution B;
4) and mixing the aqueous solution a and the aqueous solution b, and cooling to normal temperature to obtain a finished product.
In the method, the humectant is one or more of dodecanol, lauroyl monoethanolamine polyoxyethylene ether and sorbitol.
In the above method, the binder is one or more of xanthan gum, gum tragacanth, locust bean gum, gum arabic and guar gum.
In the above method, the surfactant is one or more of tetradecyl dihydroxyethyl amine oxide, lauramidopropyl amine oxide, lauryl amphoteric imidazoline, and lauramidopropyl hydroxysultaine.
In the method, the viscosity of the dust suppressant is 15-600 mPa · s.
Compared with the prior art, the invention has the advantages that:
1. the dust suppressant used in the invention is water-soluble, and is sprayed after a layer of clear water is sprayed on the road surface in advance, so that on one hand, the dust can be effectively infiltrated, and the use effect of the dust suppressant is improved; on the other hand, hydrophilic groups in the dust suppressant molecules can be effectively combined with the wetted dust, so that the dust suppressant infiltration speed is greatly increased, the loss of the dust suppressant is reduced, and the dust suppression duration is obviously prolonged.
2. The invention selects the amphoteric surfactant to improve the wetting ability of the dust suppressant, and compared with the commonly used anionic surfactant, the amphoteric surfactant has better wetting property and biodegradability, but has different characteristics due to the fluctuation of pH value. The binder used in the invention is a natural binder, the biodegradable characteristic of the binder is ensured, the pH value of the dust suppressant aqueous solution is weakly acidic, and the amphoteric surfactant is higher than the isoelectric point of the amphoteric surfactant, so that the wetting characteristic of the surfactant can be ensured to be improved. Meanwhile, the polyvinyl alcohol is used as a film forming agent, the polyalcohol is used as a humectant, the surfactant molecules can be adsorbed, the number of free surfactant molecules in the solution can be reduced, the formation of micelles is promoted, and the infiltration effect is improved. In conclusion, the wetting capacity of the dust suppressant can be improved to the greatest extent while the viscosity of the dust suppressant is ensured, the using effect of the dust suppressant is improved, and the loss of the dust suppressant is reduced.
Detailed Description
The dust suppressant employed in the following examples consists of the following components by weight:
humectant (dodecanol, purity more than or equal to 99%): 1 percent of
Polyvinyl alcohol (model 1788): 2 percent of
Binder (xanthan gum, purity > 90%): 0.5 percent
Surfactant (tetradecyl dihydroxyethyl amine oxide, purity not less than 90%): 2.5 percent
Water: 94 percent;
the preparation method comprises the following steps: (1) dividing water into A, B parts, heating part A to 70 deg.C, and part B to 40 deg.C, wherein part A is 376g and part B is 564 g; (2) sequentially adding 25g of tetradecyl dihydroxyethyl amine oxide and 5g of xanthan gum into the A for dissolving, and stirring at 50rpm/min for 50min to obtain an aqueous solution a; (3) adding 20g of polyvinyl alcohol into the part B, uniformly mixing, adding 10g of dodecanol, and stirring at 50rpm/min for 30min to obtain an aqueous solution B; (4) and mixing the a and the b to obtain a finished product.
Example 1
An application method of a dust suppressant comprises the following steps:
1) diluting the bonding type dust suppressant by 4 times by weight with water to obtain a dust suppressant diluent;
2) spraying 0.3L/m on the road surface by using a watering cart2The speed of the sprinkler is 10km/h, and the pavement is fully soaked;
3) spraying dust suppressant on road by using a sprinkler with dust suppressant diluent, wherein the spraying amount of the dust suppressant is 0.8L/m2The spraying speed is 7 km/h;
4) spraying dust suppressant on the exposed ground surface of the road periphery by using a sprinkling truck fog gun device filled with dust suppressant diluent, wherein the spraying amount is 2.5L/m2。
Comparative example 1
The application method of the dust suppressant is the same as that of the example 1, except that no clear water is sprayed on the road surface.
Example 2
An application method of a dust suppressant comprises the following steps:
1) diluting the bonding type dust suppressant by 10 times by weight with water to obtain a dust suppressant diluent;
2) spraying 0.7L/m on the road surface by using a water spraying vehicle2The speed of the sprinkler is 10km/h, and the road surface is filled with waterSeparately soaking;
3) spraying dust suppressant on road by using a sprinkler with dust suppressant diluent, wherein the spraying amount of the dust suppressant is 0.7L/m2The spraying speed is 7 km/h;
4) spraying dust suppressant on the exposed ground surface of the road periphery by using a sprinkling truck fog gun device filled with dust suppressant diluent, wherein the spraying amount is 2.0L/m2。
Comparative example 2
The application method of the dust suppressant is the same as that of the example 1, except that no clear water is sprayed on the road surface.
The beneficial effect of the dust suppressants of the present invention was demonstrated by monitoring the TSP concentration before and after spraying the dust suppressants of examples 1 and 2 and comparative examples 1 and 2 in accordance with the national Standard for particulate measurement GB/T15432-1995 gravimetric method of determination of Total suspended particulate matter in ambient air.
TABLE 1 dust suppression Retention time of dust suppressant
Examples Dust suppression effect maintenance time
Example 1 The time for maintaining the TSP dust suppression efficiency to be more than 50 percent is 81h
Comparative example 1 The time for maintaining the TSP dust suppression efficiency to be more than 50 percent is 48h
Example 2 The time for maintaining the TSP dust suppression efficiency to be more than 40 percent is 51h
Comparative example 2 The TSP dust suppression efficiency is maintained at 40 percentHas a time of 35h
Example 3
An application method of a dust suppressant comprises the following steps:
1) diluting the bonding type dust suppressant by 2 times by weight with water to obtain a dust suppressant diluent;
2) spraying 0.1L/m on the road surface by using a watering cart2The speed of the sprinkler is 15km/h, and the pavement is fully soaked;
3) spraying dust suppressant on road by using a sprinkler with dust suppressant diluent, wherein the spraying amount of the dust suppressant is 1.0L/m2The spraying speed is 10 km/h;
4) spraying dust suppressant on the exposed ground surface of the road periphery by using a sprinkling truck fog gun device filled with dust suppressant diluent, wherein the spraying amount is 1.0L/m2。
Example 4
An application method of a dust suppressant comprises the following steps:
1) diluting the bonding type dust suppressant by 10 times by weight with water to obtain a dust suppressant diluent;
2) spraying 0.8L/m on the road surface by using a watering cart2The speed of the sprinkler is 5km/h, and the pavement is fully soaked;
3) spraying dust suppressant on road by using a sprinkler with dust suppressant diluent, wherein the spraying amount of the dust suppressant is 1.5L/m2The spraying speed is 4 km/h;
4) spraying dust suppressant on the exposed ground surface of the road periphery by using a sprinkling truck fog gun device filled with dust suppressant diluent, wherein the spraying amount is 1.5L/m2。

Claims (9)

1. The application method of the dust suppressant is characterized by comprising the following steps of:
1) diluting the dust suppressant by 2-10 times by weight with water to obtain dust suppressant diluent;
2) spraying 0.1-0.8L/m on the road surface2The pavement is fully soaked by the clean water;
3) spraying dust-suppressing agent diluent on road to suppress dustThe spraying amount of the diluent is 0.7-1.5L/m2；
4) Spraying dust suppressant diluent to the exposed ground surface around the road, wherein the spraying amount is 1-2.5L/m2。
2. The application method of claim 1, wherein a spraying vehicle is used for spraying clear water in the step 2), and the speed of the spraying vehicle is 5-15 km/h.
3. The application method of claim 1, wherein the dust suppressant diluent is sprayed in the step 3) by a spraying vehicle, and the spraying vehicle speed is 4-10 km/h.
4. The application method of claim 1, wherein the dust suppressant comprises the following raw materials in percentage: 0.1-1% of humectant, 2-5% of polyvinyl alcohol, 0.5-9% of binder, 1-5% of surfactant and the balance of water.
5. The application method of claim 4, wherein the dust suppressant is prepared by:
1) preparing raw materials according to the mass fraction ratio of the raw materials, dividing water into A, B parts, heating the A part to 70-80 ℃, and heating the B part to 40-50 ℃, wherein the mass ratio of A to B is 1: 1.5-2;
2) adding a surfactant into the part A for dissolving, adding a binder after uniformly stirring, and stirring at 50-100 rpm/min for 30-50 min to obtain an aqueous solution a;
3) adding polyvinyl alcohol into the part B, uniformly stirring, adding a humectant, and stirring at 50-100 rpm/min for 15-30 min to obtain an aqueous solution B;
4) and mixing the aqueous solution a and the aqueous solution b, and cooling to normal temperature to obtain a finished product.
6. The application method as claimed in claim 4, wherein the humectant is one or more of dodecanol, laurylmethanolamine polyoxyethylene ether and sorbitol.
7. The method of use according to claim 4, wherein the binder is one or more of xanthan gum, gum tragacanth, locust bean gum, gum acacia and guar gum.
8. The method of use according to claim 4, wherein the surfactant is one or more of tetradecyl dihydroxyethyl amine oxide, lauramidopropyl amine oxide, lauryl amphoteric imidazoline, and lauramidopropyl hydroxysultaine.
9. The method of use according to claim 4, wherein the dust suppressant has a viscosity of 15 to 600 mPa-s.
CN201911353289.4A 2019-12-25 2019-12-25 Application method of dust suppressant Active CN111117569B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1240083A (en) * 1982-03-12 1983-09-15 Cargill Incorporated Dust suppressor
CN107955583A (en) * 2017-03-27 2018-04-24 日东（青岛）研究院有限公司 A kind of efficient and environment-friendly type dust suppressant and preparation method thereof, application
CN108192570A (en) * 2018-01-22 2018-06-22 天津圣洁环保科技有限公司 Dust suppressant and preparation method thereof, application method and application
CN110373156A (en) * 2019-08-29 2019-10-25 艾珂(上海)环境技术工程有限公司 A kind of Environment-friendlywater-soluble water-soluble coheres type dust suppressant and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1240083A (en) * 1982-03-12 1983-09-15 Cargill Incorporated Dust suppressor
CN107955583A (en) * 2017-03-27 2018-04-24 日东（青岛）研究院有限公司 A kind of efficient and environment-friendly type dust suppressant and preparation method thereof, application
CN108192570A (en) * 2018-01-22 2018-06-22 天津圣洁环保科技有限公司 Dust suppressant and preparation method thereof, application method and application
CN110373156A (en) * 2019-08-29 2019-10-25 艾珂(上海)环境技术工程有限公司 A kind of Environment-friendlywater-soluble water-soluble coheres type dust suppressant and preparation method thereof

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