CN107620607B - A kind of fully mechanized workface step subzone of atomization dust removal method - Google Patents
A kind of fully mechanized workface step subzone of atomization dust removal method Download PDFInfo
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Abstract
A kind of fully mechanized workface step subzone of atomization dust removal method, comprehensive pick face is met head on to be divided into jet atomization dust suppression area, air atomizing depositing dust area and three, area of pressure Wu Ping dust-separation region, is atomized dust-arrest device, air atomizing device for reducing dust and the realization Trinity subregion dedusting of dust-separation mist screen generator by laying negative pressure secondary；Start the secondary dust-arrest device of negative-pressure atomizing before tunneling machine cutting, high speed spray both can carry out source wetting, inhibition and sedimentation to dust, dust laden air around cutterhead can be sucked in dust gathering arrester again, secondary capturing, sedimentation dust, air atomizing device is sprayed to boring head return side, atomizing effect is improved with gaseous pressure and weakens return side wind speed, to prevent influencing rear portion dust-separation mist screen form, dust-separation mist screen to development end meet head on direction inclination injection, the influence of the forced air feed of working face is resisted, retention probability and barrier effect of settling to dust are promoted.The present invention is comprehensive mechanized excavation surface dirt high efficiency, low cost administers and provides new method, has wide applicability.
Description
Technical field
The present invention relates to a kind of driving face dust removal method, especially a kind of fully mechanized workface step subzone of atomization dedustings
Method.
Background technique
Fully mechanized workface is one of most important dust point of underground coal mine.Most of China's coal-mine Pneumoconiosis Patients are driving
Worker, development end are also the most place of coal dust explosion under coal mine shaft number.Along with the universal of tunnel experimentation, pick
Into machine high intensity driving so that dust-producing amount persistently rises, worker's physical and mental health and safety in production are caused to seriously endanger.
The common dust prevention and control technology of fully mechanized workface mainly has atomizing de-dusting and dedusting fan dedusting inside and outside development machine,
Dust hazard has played important function in administering.But development machine inner spraying nozzle easily blocks, and required hydraulic pressure is larger, private water supply pipeline
Sealing problem is difficult to solve so far, so that its dust suppression effect can not play；Existing external spraying dust-removing method is confined to sky more
It swims in gas capture, the sedimentation of dust, and droplet field density is low, vulnerable to forced distinguished and admirable influence, can not accurately spray to driving
Crusher machine dust region, dust-laying effect are poor.Dedusting fan handle air quantity it is limited, dust get into the air after easily with it is distinguished and admirable quickly
Diffusion, so that the difficulty increasing that dedusting fan sucking dust-laden is distinguished and admirable, and it uses exhaust ventilation machine, in highly gassy mine and dashes forward
The application of mine is seriously restricted out；In addition, its occupied space is big, install and use in middle small section tunnel by biggish limit
System.Fully mechanized workface is restricted clearance, more highly concentrated if dust can not be inhibited to generate or make at the early stage of production its wetting, sedimentation
The dust of degree will flow to the wind tunnel rear under the conditions of forced ventilation and constantly migrate, and pollute whole tunnel.
Summary of the invention
To solve the above problems, the present invention provides a kind of fully mechanized workface step subzone of atomization dust removal method, solve comprehensive
The problem of face dust concentration severely exceeds is dug, is provided for the remote feature of the small migration distance of respirable dust partial size multiple
Measurements for reduction enhances and controls dirt effect, avoids boring head dust to the loss of tunnel rear, reduces pollution range.
To achieve the above object, the present invention uses following technological means:
The present invention provides a kind of fully mechanized workface step subzone of atomization dust removal method, including meets head on comprehensive pick face to be divided into jet stream
It is atomized dust suppression area (8), air atomizing depositing dust area (9) and (10) three, pressure Wu Ping dust-separation area region, and jet stream mist is respectively adopted
Change dust suppression, the step atomization method collaboration of air atomizing depositing dust and pressure mist screen dust-separation is administered specifically includes the following steps:
A. in cutting arm of tunneling machine (4) and machine body of boring machine (5) junction, circumferentially uniformly distributed negative pressure secondary atomization presses down
Dirt device (1) arranges air atomizing device for reducing dust (2) in machine body of boring machine (5) forefront of return side, in development machine driver position
(6) dust-separation mist screen generator (3) are arranged along drift section direction on the machine body of boring machine (5) of front 80-100cm, negative pressure secondary
Dust-arrest device (1) and dust-separation mist screen generator (3) are atomized using dynamic pressure water as driving force, air atomizing device for reducing dust (2) is with comprehensive
Pick face static pressure water and pressure wind are driving force；
B. when development machine will start cutting, starting negative pressure secondary atomization dust-arrest device (1), dynamic pressure water is mixed with dust suppressant
Dust suppression agent solution is formed, forms jet atomization dust suppression area (8) around high speed injection to cutterhead (7), droplet is to tunneling machine cutting
The dust that coal petrography generates carries out source wetting, inhibition and sedimentation, and high velocity mist drip forms negative inside annular dust gathering arrester after spraying
It presses, sucks dust laden air around cutterhead, acted on by droplet and dust by its secondary capturing, sunk inside annular dust gathering arrester
Drop；
C. air atomizing device for reducing dust (2) are opened, are sprayed to boring head return side, formed air atomizing depositing dust area (9),
Atomizing effect is improved with gaseous pressure, increases droplet density promotion to the capture ability of respirable dust, while weakening return side
Distinguished and admirable flow velocity reduces the distinguished and admirable influence to rear portion dust-separation mist screen form of return side；
D. dust-separation mist screen generator (3) are opened, is formed pressure Wu Ping dust-separation area (10), captured through jet atomization dust suppression area
(8), air atomizing depositing dust area (9) effect after residual dust, injection direction to driving face meet head on direction tilt 5-10 °,
To resist the distinguished and admirable influence to the forming of dust-separation mist screen of driving face forced ventilation, while improving the opposite of droplet and dust and touching
Hit probability.
Further, the mist droplet particle size range that the dust-separation mist screen generator (3) sprays, which is 40-80 μm, of the invention to be had
Beneficial effect:
The present invention meets head on comprehensive pick face to be divided into three regions, and be respectively adopted jet atomization dust suppression, air atomizing depositing dust and
The three kinds of atomization method collaborations of pressure mist screen dust-separation are administered, and dust removing effects greatly improved.Development machine will start cutting Shi Xiankai
Negative pressure secondary atomization dust-arrest device is opened, the spray head by high speed droplet through being evenly arranged in around cutting arm is sprayed to cutterhead,
Annular droplet group is formed, pick and coal petrography wall surface are soaked and wraps up cutting fracture area to the full extent, because of tunneling machine cutting coal petrography
The dust of generation is contacted with droplet before flying upward with the wind, is realized and is collected after source dust suppression, depositing dust effect, high speed droplet spray in annular
Form negative pressure in dust hood, suck dust laden air around cutterhead, dust with droplet is secondary contacts, realize depositing dust again, catch dirt and make
With using gaseous pressure raising static pressure water atomization effect, increase droplet density effectively improves the capture probability to respirable dust
And effect of settling, while atomization air flow and return side wind direction are on the contrary, can weaken that return side is distinguished and admirable to imitate dust-separation mist screen shaping
The influence of fruit, dust-separation mist screen can obstruct the residual dust in air-flow in front of development machine driver position, to prevent to tunnel rear
Continue to migrate, dust-separation mist screen to cutting meet head on direction inclination injection, can resist section outgoing airflow influence, maintain effective shape
State.Dust-separation mist screen generator is fixed on machine body of boring machine, can be pushed ahead together with development machine, when can exempt artificial mobile
Increased especially labour improves operating efficiency, and can always completely cut off dust and in working face meet head on to locate, guarantee development machine driver and
Rear portion tunnel operating personnel is in clean room, achievees the effect that lasting dust-separation.
Detailed description of the invention
Fig. 1 is facilities and equipments overall structure diagram of the invention；
Fig. 2 is subregion dedusting function schematic diagram of the invention；
In figure: 1, negative pressure secondary is atomized dust-arrest device；2, air atomizing device for reducing dust；3 ,-dust-separation mist screen generator；4, it digs
Into machine cutting arm；5, machine body of boring machine；6, development machine driver position；7, cutterhead；8, jet atomization dust suppression area；9, air atomizing
Depositing dust area；10, pressure Wu Ping dust-separation area.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention will be further described.
Embodiment 1: as shown in Figs. 1-2, the present embodiment provides a kind of fully mechanized workface step subzone of atomization dust removal method, packets
It includes and comprehensive pick face is met head on to be divided into jet atomization dust suppression area 8, air atomizing depositing dust area 9 and 10 3, area of pressure Wu Ping dust-separation region,
And the step atomization method collaboration that jet atomization dust suppression, air atomizing depositing dust and pressure mist screen dust-separation is respectively adopted is administered, specifically
The following steps are included:
(a) by the atomization of 6 groups of negative pressure secondaries, dust-arrest device 1 is uniformly distributed connect in cutting arm of tunneling machine 4 with machine body of boring machine 5
Place, arrangement air atomizing device for reducing dust 2 are dug in 5 forefront of machine body of boring machine of return side in 6 front 80cm of development machine driver position
Dust-separation mist screen generator 3 is arranged along drift section direction on into machine fuselage 5, using dynamic pressure water as negative pressure secondary-atomizing dust-arrest device 1
With the driving force of dust-separation mist screen generator 3, using comprehensive pick face static pressure water and press wind as the driving force of air atomizing device for reducing dust 2；
(b) when development machine will work, first start negative pressure secondary and be atomized dust-arrest device 1, dynamic pressure water mixes shape with dust suppressant
At dust suppression agent solution, high speed injection to 7 surrounding of cutterhead forms jet atomization dust suppression area 8, and droplet produces tunneling machine cutting coal petrography
Raw dust carries out source wetting, inhibition and sedimentation, and high velocity mist drip forms negative pressuren zone inside annular dust gathering arrester after spraying, from
Dust laden air around annular dust gathering arrester rear portion sucking cutterhead, dust are caught with after droplet effect by secondary inside annular dust gathering arrester
It obtains, settle；
(c) air atomizing device for reducing dust 2 is opened, high pressure draught and droplet stream are quickly sprayed to boring head return side, shape
At air atomizing depositing dust area 9, atomizing effect is improved with gaseous pressure, increases droplet density promotion to the capture energy of respirable dust
Power, at the same with weaken the distinguished and admirable flow velocity of return side, reduce the distinguished and admirable influence to rear portion dust-separation mist screen form of return side；
(d) dust-separation mist screen generator 3 is opened, forms pressure Wu Ping dust-separation area 10, capture is through jet atomization dust suppression area 8, sky
Aerosolization depositing dust area 9 act on after residual dust, injection direction to driving face meet head on direction tilt 7 °, with resist driving
The distinguished and admirable influence to the forming of dust-separation mist screen of working face forced ventilation, while improving the opposite collision probability of droplet and dust.With
Dust migration distance increase, large dust particle constantly settle respirable dust accounting raising, it is desirable that mist droplet particle size range be 40 μ
m。
Claims (2)
1. a kind of fully mechanized workface step subzone of atomization dust removal method, which is characterized in that including meeting head on comprehensive pick face to be divided into jet stream
It is atomized dust suppression area (8), air atomizing depositing dust area (9) and (10) three, pressure Wu Ping dust-separation area region, and jet stream mist is respectively adopted
The step atomization method for changing dust suppression, air atomizing depositing dust and pressure mist screen dust-separation, which cooperates with, to be administered, specifically includes the following steps:
A. in cutting arm of tunneling machine (4) and machine body of boring machine (5) junction, circumferentially uniformly distributed negative pressure secondary atomization dust suppression is filled
It sets (1), arranges air atomizing device for reducing dust (2) in machine body of boring machine (5) forefront of return side, in development machine driver position (6)
Dust-separation mist screen generator (3) are arranged along drift section direction on the machine body of boring machine (5) of front 80-100cm, negative pressure secondary atomization
Dust-arrest device (1) and dust-separation mist screen generator (3) are using dynamic pressure water as driving force, and air atomizing device for reducing dust (2) is with comprehensive pick face
Static pressure water and pressure wind are driving force；
B. when development machine will start cutting, starting negative pressure secondary atomization dust-arrest device (1), dynamic pressure water is mixed to form with dust suppressant
Dust suppression agent solution, high speed injection to cutterhead (7) surrounding form jet atomization dust suppression area (8), and droplet is to tunneling machine cutting coal petrography
The dust of generation carries out source wetting, inhibition and sedimentation, and high velocity mist drip forms negative pressure after spraying inside annular dust gathering arrester, inhales
Enter dust laden air around cutterhead, is acted on by droplet and dust by its secondary capturing, sedimentation inside annular dust gathering arrester；
C. air atomizing device for reducing dust (2) are opened, is sprayed to boring head return side, formed air atomizing depositing dust area (9), with gas
Phase pressure improves atomizing effect, increases droplet density promotion to the capture ability of respirable dust, while it is distinguished and admirable to weaken return side
Flow velocity reduces the distinguished and admirable influence to rear portion dust-separation mist screen form of return side；
D. dust-separation mist screen generator (3) are opened, is formed pressure Wu Ping dust-separation area (10), capture is through jet atomization dust suppression area (8), sky
Aerosolization depositing dust area (9) effect after residual dust, injection direction to driving face meet head on direction tilt 5-10 °, with resist
The distinguished and admirable influence to the forming of dust-separation mist screen of driving face forced ventilation, while the opposite collision for improving droplet and dust is several
Rate.
2. a kind of fully mechanized workface step subzone of atomization according to claim 1 dust removal method, which is characterized in that described
The mist droplet particle size range that dust-separation mist screen generator (3) sprays is 40-80 μm.
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| CN109681202A (en) * | 2019-01-28 | 2019-04-26 | 黄山市徽州安华工程机械有限公司 | The spray dust-reducing system of development machine |
| CN110578548A (en) * | 2019-09-02 | 2019-12-17 | 中铁五局集团有限公司 | Tunnel dust removal system and method |
| CN111396117B (en) * | 2020-05-14 | 2021-04-27 | 徐州工程学院 | Method for achieving dust settling through linkage of liquid nitrogen mist and fine water mist on fully mechanized excavation face |
| CN111412011B (en) * | 2020-05-14 | 2021-04-27 | 徐州工程学院 | Fine water mist and liquid nitrogen mist linkage system for preventing and treating dust on roadway driving face |
| CN111878077B (en) * | 2020-08-25 | 2022-03-18 | 南京信息工程大学 | Cutting dust falling and reducing method for coal roadway fully-mechanized excavation working face |
| CN114151082B (en) * | 2021-10-27 | 2023-12-12 | 中国矿业大学 | Automatic high-pressure jet auxiliary rock breaking and foam dust suppression cutting pick device |
| CN114297794B (en) * | 2021-12-27 | 2024-03-29 | 太原理工大学 | Comprehensive intelligent comprehensive dust removal method for full space of fully-mechanized coal mining face |
| CN115006950A (en) * | 2022-07-15 | 2022-09-06 | 黄山市科美环境科技有限公司 | 360-degree dry fog spraying and dedusting method |
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