CN107828380A - A kind of coal stream dust suppressant and its preparation method and application - Google Patents
A kind of coal stream dust suppressant and its preparation method and application Download PDFInfo
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- CN107828380A CN107828380A CN201711124201.2A CN201711124201A CN107828380A CN 107828380 A CN107828380 A CN 107828380A CN 201711124201 A CN201711124201 A CN 201711124201A CN 107828380 A CN107828380 A CN 107828380A
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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
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- C09K3/00—Materials not provided for elsewhere
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
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Abstract
The invention belongs to the technical field of coal stream Dust Improvement, more particularly to a kind of coal stream dust suppressant and its preparation method and application.The invention discloses a kind of coal stream dust suppressant, in parts by weight, including：Starch graft acrylic acid polymer, surfactant and water.Coal stream dust suppressant disclosed by the invention has good coalescence, wetability and permeability, makes dust granules quick humidification, and coalescence is together, increases the particle diameter and weight of dust granules, simultaneously, moreover it is possible to makes inside dust suppressant rapid osmotic coal stream, reaches the effect of dust suppression.A kind of coal stream dust suppressant provided by the invention can effectively solve the short technological deficiency of traditional dust suppressant dust suppression speed.
Description
Technical field
The invention belongs to the technical field of coal stream Dust Improvement, more particularly to a kind of coal stream dust suppressant and preparation method thereof and
Using.
Background technology
Coal stream refers to coal conveying system, and coal easily produces airborne dust on belt in transportation, causes resource unrestrained
Take and environmental pollution.Dust dynamic coal flow is divided into advection airborne dust and falls to flow two kinds of airborne dust.Belt is in motion process, belt both sides
Air traction air-flow can be produced with belt movement, due to the viscosity of gas, coal stream and traction air-flow on belt are present
Velocity gradient, adsorb the coal dust on coal cinder surface and give birth to relative motion with coal miscarriage in the presence of frictional force, peeled off from coal cinder
Fly upward, make to produce a certain amount of dust above belt, here it is advection airborne dust.Falling to flow airborne dust is total to by induced draft and shear flow
Formed under same-action, coal particle is in drop event, and movement velocity is increased with the rule of freely falling body, and air is rushed by particle
Hit the effect of power and frictional force, produce the linear motion consistent with particle direction, drop coal stream side and air pressure below
It is low, dragged the air of surrounding and draw and produce induced draft, induced draft moves with it the grit in coal flow table face, and generation is raised
Dirt；When shear flow refers to that coal is wandered to rigid plane, loose coal stream by rigid plane squeezing action, by coal cinder gap
Air extrude suddenly, form upward shear flow, drive tiny dust to escape, cause dust from flying.Due to coal
Handling, the time reprinted and transported on belt are relatively short, therefore also require that dust suppressant can quickly play dust suppression effect
Fruit.At present, coal handling system dust-producing amount is big, and space occlusion, coal stream airborne dust not only causes coal measuring loss, meanwhile, cause serious dirt
Dye, the especially coal that comes to some easy dusts, the dust concentration of coal handling system are far above the working region powder of national Specification
Dust concentration is not more than 4mgm-3Requirement, it is necessary to take certain dust suppression measure.Existing coal stream dust suppression is mainly by manually fixed
When spray water carry out dust suppression this method and have certain hysteresis quality, and waste time and energy.
In summary, there is the short technological deficiency of anti-dust effect in traditional coal stream dust suppressant.Based on this, develop a kind of fast
The coal stream dust suppressant for playing anti-dust effect of speed is those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
In view of this, the invention provides a kind of coal stream dust suppressant, it is short effectively to solve traditional dust suppressant dust suppression speed
Technological deficiency.
The invention provides a kind of coal stream dust suppressant, in parts by weight, including：Starch graft acrylic acid polymer, table
Face activating agent and water.
Preferably, in parts by weight, including：
Starch graft acrylic acid polymer 1.0-3.0 parts；
Surfactant 0.02-0.06 parts；
100 parts of water.
Preferably, the starch graft acrylic acid polymer is 2 parts by weight.
Preferably, the preparation method of the starch graft acrylic acid polymer is as follows：
S101：Starch is gelatinized, obtains gelatinized starch；
S102：The gelatinized starch, ammonium persulfate and acrylic acid solution hybrid reaction are obtained into the starch-grafted propylene
Acid polymer.
Preferably, the starch is soluble starch.
Preferably, the acrylic acid solution is specially the acrylic acid solution that degree of neutralization is 70%-75%.
More preferably, the acrylic acid solution is specially the acrylic acid solution that degree of neutralization is 70%.
Preferably, the acrylic acid solution that the degree of neutralization is 70%-75% is specially to acrylic acid using sodium hydroxide
Solution carries out neutralization and formed.
Further, the S101 is specially and mixes starch with water to be gelatinized.
Further, when degree of neutralization is 70%, the starch, the ammonium persulfate, the acrylic acid, the hydroxide
The mass ratio of sodium and the water is 1: 0.03: 5；1.95∶50.
Preferably, the surfactant is lauryl sodium sulfate.
Preferably, the water is specially demineralized water.
The invention discloses a kind of preparation method of coal stream dust suppressant, including：By starch graft acrylic acid polymer, surface
Activating agent and water, which are mixed with, to be formed.
The invention also discloses application of the coal stream dust suppressant in coal stream process coal airborne dust is reduced.
Present invention discover that, falling stream in gravity due to coal flow velocity degree (speed of service of coal conveyer belt is typically in 4m/s) quickly
In the presence of acceleration, faster, haulage time of the coal on belt is extremely short for coal flow velocity degree, meanwhile, gas is drawn in the case of advection
Stream makes the grit in coal flow table face produce airborne dust, and in the case of stream is fallen, powerful induced draft, shear flow not only make top layer
Grit produces airborne dust, and the grit below top layer can also be made to produce airborne dust, the airborne dust feature based on coal stream, existing Dust depression of coal stock pile
Agent idea plays dust suppression by consolidation and acted on, but existing dust suppression is mainly artificial timing spray water progress dust suppression, existing
Some dust-suppression methods are difficult to meet current demand.Therefore, because coal stream airborne dust is by traction air-flow, induced draft, shear flow
Cause etc. factor, and coal flow velocity degree is fast, it is necessary to dust suppressant has good coalescence and wetability, dust granules is quickly moistened
It is wet, and coalescence is together, increases the particle diameter and weight of dust granules, reaches the effect of dust suppression, meanwhile, for falling to flow dust suppression
Say, powerful induced draft, shear flow make the fine particle inside loose coal stream escape to form airborne dust, also need dust suppressant to have
Good permeability, enable inside dust suppressant rapid osmotic coal stream.
Based on this, the invention discloses a kind of coal stream to press down agent, and the starch graft acrylic acid polymer of coal stream dust suppressant is one
The good coalescence material of kind, mainly plays coalescence, increases the weight of its grit by tiny grit coalescence together, reach suppression
Dirt effect, the concentration of dust suppressant is higher, and the viscosity increase of dust suppressant strengthens coalescence, but the increase of the viscosity of dust suppressant also can
Decline permeability, the present invention considers its coalescence and infiltrative balance, and the viscosity for determining dust suppressant is 10MPa.s, from
And the usage amount of starch graft acrylic acid polymer is determined, in addition, surfactant can reduce the table of Coal Dust and water
Face tension force, shorten time of penetration of the dust suppressant in coal seam, water is 40s in the coal seam time of penetration of 1cm thickness, and be with the addition of
After surfactant, time of penetration shorten to 25s, so surfactant has stronger wetability and permeability, can make coal
Flow the quick dust suppression of dust suppressant.According to this principle, coal stream dust suppressant of the present invention is selected starch graft acrylic acid polymer
It is used cooperatively with lauryl sodium sulfate, the surface tension of water can be significantly reduced, improve wetting of the dust suppressant to coal sample
Property and permeability, raw anti-dust effect of being miscarried in a short time to coal with this, significantly suppress dynamic coal flow airborne dust.By in dynamic
Dust behavior experimental rig and scene carry out sprinkling dust suppression experiment by coal stream dust suppressant sprinkling system and shown, coal stream dust suppressant
The dust of the particle diameters such as PM1.0, PM2.5, PM10 around coal stream is set averagely to decline 98%, and spray water puts down different-grain diameter dust
Decline 72%, anti-dust effect significantly improves.So the coal stream dust suppressant that the present invention develops has good coalescence, wetting
Property and permeability, these performances are better than pure water, and anti-dust effect is significantly stronger than pure water.
Embodiment
The invention provides a kind of coal stream dust suppressant and its preparation method and application, for solving dust suppressant in the prior art
The short technological deficiency of dust suppression speed be present.
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example only part of the embodiment of the present invention, rather than whole embodiments.It is common based on the embodiment in the present invention, this area
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects
Enclose.
Wherein, the raw material used in following examples is commercially available or made by oneself.
Embodiment 1
Coal stream dust suppressant disclosed in the present embodiment 1, include the raw material of following parts by weight：
2.0 parts of starch graft acrylic acid polymer；
0.03 part of lauryl sodium sulfate；
100 parts of water.
The preparation method of the dust suppressant of above-described embodiment 1, comprises the following steps：
100 parts of 2.0 parts of starch graft acrylic acid polymer, 0.03 part of lauryl sodium sulfate and water are taken in parts by weight,
Starch graft acrylic acid polymer, lauryl sodium sulfate and water is added in the container equipped with mechanical agitator to be sufficiently stirred,
The dust suppressant finished product is obtained after being completely dissolved.
Embodiment 2
Coal stream dust suppressant disclosed in the present embodiment 2, include the raw material of following parts by weight：
1.0 parts of starch graft acrylic acid polymer；
0.02 part of lauryl sodium sulfate；
100 parts of water.
The preparation method of the dust suppressant of above-described embodiment 2, comprises the following steps：
100 parts of 1.0 parts of starch graft acrylic acid polymer, 0.02 part of lauryl sodium sulfate and water are taken in parts by weight,
Starch graft acrylic acid polymer, lauryl sodium sulfate and water is added in the container equipped with mechanical agitator to be sufficiently stirred,
The dust suppressant finished product is obtained after being completely dissolved.
Further, the preparation method of starch graft acrylic acid polymer is as follows：
S101：Starch is gelatinized, obtains gelatinized starch；
S102：Gelatinized starch, ammonium persulfate and acrylic acid solution hybrid reaction are obtained into starch graft acrylic acid polymer.
Therefore, the coal stream dust suppressant of the present embodiment 2 has nontoxic, degradable, easy engineer applied, cost low and to ring
The advantages that border is pollution-free.
Embodiment 3
Coal stream dust suppressant disclosed in the present embodiment 3, include the raw material of following parts by weight：
3.0 parts of starch graft acrylic acid polymer；
0.05 part of lauryl sodium sulfate；
100 parts of water.
The preparation method of the dust suppressant of above-described embodiment 3, comprises the following steps：
100 parts of 3.0 parts of starch graft acrylic acid polymer, 0.05 part of lauryl sodium sulfate and water are taken in parts by weight,
Starch graft acrylic acid polymer, lauryl sodium sulfate and water is added in the container equipped with mechanical agitator to be sufficiently stirred,
The dust suppressant finished product is obtained after being completely dissolved.
Further, the preparation method of starch graft acrylic acid polymer is specially：
4g starch and distilled water are added in the 250mL flasks equipped with agitator, condenser pipe and thermometer, 80 DEG C are stirred
After mixing constant temperature gelatinization 30min, 70 DEG C are subsequently cooled to, 0.12g ammonium persulfates is added, acrylic acid solution 20ml is added dropwise after 10min
(acrylic acid solution is the acrylic acid solution that degree of neutralization is 70%, is neutralized using sodium hydroxide) reacts 3h, anti-by polymerizeing
Starch graft acrylic acid polymer should be obtained.Wherein, the acrylic acid solution that 20ml degree of neutralization is 70% needs sodium hydroxide matter
Measure as 7.8g；Wherein, preparing raw material, starch, ammonium persulfate, the weight of acrylic acid and water are frequently specifically, starch: ammonium persulfate
: acrylic acid: sodium hydroxide: water=1: 0.03: 5: 1.95: 50.
Further, acrylic acid solution is specially the acrylic acid solution that degree of neutralization is 70%, wherein, using NaOH to propylene
Acid solution is neutralized.
Further, surfactant is lauryl sodium sulfate.
Further, starch is soluble starch, can be gelatinized in the hot water.
Further, acrylic acid purity is pure to analyze, and crosslinking agent, density 1.04-1.05g/ are used as in polymerisation
mL。
Further, NaOH is to analyze pure, colourless transparent crystal, density 2.13g/cm3。
Further, ammonium persulfate purity is pure to analyze, and initiator, density 1.982g/ are used as in polymerisation
cm3。
Further, lauryl sodium sulfate white powdery solid, density 1.09g/cm3, pH 7.5-9.5.
Further, the solvent of coal stream dust suppressant is water, and water used is specially demineralized water.
Comparative example
This comparative example is a kind of dust suppressant, and with embodiment 1, difference is for its raw material composition and preparation method：By described ten
Sodium dialkyl sulfate replaces with neopelex.It is that embodiment 1 and comparative example and moisture is real to operation coal stream below
Sprinkling dust suppression is applied, to contrast anti-dust effect, as a result as shown in table 1.
The performance test results table of the coal stream dust suppressant of the embodiment 1 of table 1 and comparative example
| Project | Embodiment 1 | Comparative example |
| Outward appearance | Colourless transparent liquid, have no irritating odor | Colourless transparent liquid, have no irritating odor |
| Viscosity/MPa.s | 10.3-10.5 | 9.0-9.5 |
| Surface tension/mN/m | 43.1-43.5 | 57.0-57.5 |
| Density/g/cm3 | 0.95-0.98 | 0.94-0.97 |
| pH | 6.8-7.2 | 6.6-7.0 |
The coal stream dust suppressant of embodiment 1, the dust suppressant of comparative example and water are pressed down by coal stream dust suppressant sprinkling system
Dirt effect experiment, the coal of experiment is 4.5 ten thousand tons, and coal conveying belt amount is 1500t/h, and the time of unloading coal is 30h, belt speed 4m/
s.Respectively measurement spray the coal stream after water, the dust suppressant of embodiment 1 and the dust suppressant of comparative example different-grain diameter (PM1.0,
PM2.5 and PM10) mean dust concentration and average total dust concentration, it the results are shown in Table 2.
The anti-dust effect table of the coal stream dust suppressant of the embodiment 1 of table 2 and comparative example
| Project | Do not spray | Water | Comparative example | Embodiment 4 |
| Total dust concentration/μ g/m3 | 4410 | 1838 | 580 | 460 |
| PM1.0/μg/m3 | 1806 | 832 | 310 | 250 |
| PM2.5/μg/m3 | 1596 | 626 | 204 | 165 |
| PM10/μg/m3 | 1001 | 320 | 52 | 30 |
From table 2 it can be seen that caused various particle diameter dust concentrations and total dirt are dense after the coal stream dust suppressant of sprinkling embodiment 1
The anti-dust effect for spending minimum, of the invention coal stream dust suppression automatic spraying method and system is notable.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
- A kind of 1. coal stream dust suppressant, it is characterised in that in parts by weight, including：Starch graft acrylic acid polymer, surface are lived Property agent and water.
- 2. coal stream dust suppressant according to claim 1, it is characterised in that in parts by weight, including：Starch graft acrylic acid polymer 1.0-3.0 parts；Surfactant 0.02-0.06 parts；100 parts of water.
- 3. coal stream dust suppressant according to claim 1, it is characterised in that the preparation of the starch graft acrylic acid polymer Method is as follows：S101：Starch is gelatinized, obtains gelatinized starch；S102：The gelatinized starch, ammonium persulfate and acrylic acid solution hybrid reaction are obtained into the starch graft acrylic acid to gather Compound.
- 4. coal stream dust suppressant according to claim 3, it is characterised in that the acrylic acid solution is specially that degree of neutralization is 70%-75% acrylic acid solution.
- 5. coal stream dust suppressant according to claim 4, it is characterised in that the degree of neutralization is 70%-75% acrylic acid Solution is specially to carry out neutralization to acrylic acid using sodium hydroxide to form.
- 6. coal stream dust suppressant according to claim 5, it is characterised in that the acrylic acid solution is specially that degree of neutralization is 70% acrylic acid solution.
- 7. coal stream dust suppressant according to claim 1 or 2, it is characterised in that the surfactant is dodecyl sulphur Sour sodium.
- 8. coal stream dust suppressant according to claim 1 or 2, it is characterised in that the water is specially demineralized water.
- A kind of 9. preparation method of coal stream dust suppressant, it is characterised in that including：Starch graft acrylic acid polymer, surfactant and water are mixed with and formed.
- 10. application of the coal stream dust suppressant in coal stream process coal airborne dust is reduced described in claim 1 to 6 any one.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110003856A (en) * | 2019-03-06 | 2019-07-12 | 山东汉为环保科技有限公司 | A kind of environmental protection dust suppressant and preparation method thereof |
| CN111560234A (en) * | 2020-06-01 | 2020-08-21 | 玉林师范学院 | Visible light catalytic degradation dust suppressant and preparation method thereof |
| CN111690091A (en) * | 2020-06-22 | 2020-09-22 | 成都蓝博纳生物科技有限公司 | Formula, preparation method and application method of environment-friendly dust suppressant |
| CN111961444A (en) * | 2020-09-02 | 2020-11-20 | 华北科技学院 | Novel high-molecular environment-friendly dust inhibitor |
| CN112516713A (en) * | 2020-12-15 | 2021-03-19 | 广东电网有限责任公司电力科学研究院 | Spray dust-settling agent and preparation method and application thereof |
| CN115975123A (en) * | 2023-03-17 | 2023-04-18 | 太原理工大学 | Nonmetal wetting agent with moisturizing and dust suppression functions and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111560234A (en) * | 2020-06-01 | 2020-08-21 | 玉林师范学院 | Visible light catalytic degradation dust suppressant and preparation method thereof |
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| CN111961444A (en) * | 2020-09-02 | 2020-11-20 | 华北科技学院 | Novel high-molecular environment-friendly dust inhibitor |
| CN112516713A (en) * | 2020-12-15 | 2021-03-19 | 广东电网有限责任公司电力科学研究院 | Spray dust-settling agent and preparation method and application thereof |
| CN115975123A (en) * | 2023-03-17 | 2023-04-18 | 太原理工大学 | Nonmetal wetting agent with moisturizing and dust suppression functions and preparation method thereof |
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