CN107620607A - 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
- Publication number
- CN107620607A CN107620607A CN201710830195.6A CN201710830195A CN107620607A CN 107620607 A CN107620607 A CN 107620607A CN 201710830195 A CN201710830195 A CN 201710830195A CN 107620607 A CN107620607 A CN 107620607A
- Authority
- CN
- China
- Prior art keywords
- dust
- pressure
- atomization
- area
- separation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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-separations region, Trinity subregion dedusting is realized by laying negative pressure secondary atomization dust-arrest device, air atomizing device for reducing dust and dust-separation mist screen generator；Start the secondary dust-arrest device of negative-pressure atomizing before tunneling machine cutting, high speed spray both can carry out source wetting, suppression and sedimentation to dust, and can sucks dust laden air around cutterhead in dust gathering arrester, secondary capturing, sedimentation dust, air atomizing device sprays to boring head return side, atomizing effect is improved with gaseous pressure and weakens return side wind speed, to prevent influenceing rear portion dust-separation mist screen form, dust-separation mist screen to development end meet head on direction tilt injection, the influence of the forced air feed of working face is resisted, lifts retention probability and barrier effect of settling to dust.The present invention is comprehensive mechanized excavation surface dirt high efficiency, low cost is administered 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 dedusting
Method.
Background technology
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 popularization of tunnel experimentation, pick
Enter machine high intensity tunnel cause dust-producing amount persistently rises, to worker physical and mental health and safety in production cause to seriously endanger.
The conventional 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, 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
Swum in gas seizure, the sedimentation of dust, and droplet field density is low, is easily pressed into the distinguished and admirable influence of formula, can not accurately spray to driving
Crusher machine dust region, dust-laying effect are poor.Dedusting fan processing air quantity is limited, dust get into the air after easily with distinguished and admirable quick
Diffusion so that the distinguished and admirable difficulty of dedusting fan suction dust-laden increases, and it uses exhaust ventilation machine, in highly gassy mine and dashes forward
The application for going out mine is seriously restricted；In addition, its space-consuming is big, installed and used in middle small section tunnel by larger limit
System.Fully mechanized workface is restricted clearance, produces if can not suppress dust or makes its wetting, sedimentation initial stage in generation, more highly concentrated
The dust of degree will flow to tunnel rear with the wind under the conditions of forced ventilation and constantly migrate, pollution whole piece tunnel.
The content 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
Dig face dust concentration severe overweight the problem of, for the small migration distance of respirable dust particle diameter it is remote the characteristics of provide it is multiple
Measurements for reduction, enhance and control dirt effect, avoid boring head dust to the loss of tunnel rear, reduce 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 comprehensive pick face is met head on to be divided into jet
Dust suppression area (8), air atomizing depositing dust area (9) and (10) three, pressure Wu Ping dust-separations area region are atomized, and jet mist is respectively adopted
The step atomization method collaboration for changing dust suppression, air atomizing depositing dust and pressure mist screen dust-separation is administered.
Further, the jet atomization dust suppression, air atomizing depositing dust, pressure mist screen dust-separation collaboration administering method specifically wrap
Include following steps：
A. negative pressure secondary atomization is circumferentially uniformly laid in cutting arm of tunneling machine (4) and machine body of boring machine (5) junction to press down
Dirt device (1), arrangement air atomizing device for reducing dust (2) is in machine body of boring machine (5) forefront of return side, in development machine driver position
(6) dust-separation mist screen generator (3), negative pressure secondary are arranged along drift section direction on front 80-100cm machine body of boring machine (5)
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 cut, the secondary dust-arrest device of negative-pressure atomizing (1) is started, dynamic pressure water mixes with dust suppressant
Dust suppression agent solution is formed, forms jet atomization dust suppression area (8) around injection to cutterhead (7) at a high speed, droplet is to tunneling machine cutting
Dust caused by coal petrography carries out source wetting, suppression and sedimentation, and high velocity mist drip is internally formed negative in annular dust gathering arrester after spraying
Pressure, dust laden air around cutterhead is sucked, acted on its secondary capturing, sunk by droplet and dust inside annular dust gathering arrester
Drop；
C. air atomizing device (2) is opened, is sprayed to boring head return side, is formed air atomizing depositing dust area (9), with gas
Phase pressure improves atomizing effect, and increase droplet density lifts the capture ability to respirable dust, while it is distinguished and admirable to weaken return side
Flow velocity, 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, is formed pressure Wu Ping dust-separations 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 shaping of dust-separation mist screen of driving face forced ventilation, while improve the relative of droplet and dust and touch
Hit probability.
Further, the mist droplet particle size scope that described dust-separation mist screen generator (3) sprays is 40-80 μm.
Beneficial effects of the present invention：
The present invention comprehensive pick face is met head on 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 first to open during cut
Negative pressure secondary atomization dust-arrest device is opened, shower nozzle of the 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 is soaked and wraps up cut fracture area to the full extent, because of tunneling machine cutting coal petrography
Caused dust contacts before flying upward with the wind with droplet, realizes source dust suppression, depositing dust effect, and high speed droplet collects after spraying in annular
Negative pressure is formed in dust hood, sucks dust laden air around cutterhead, dust with droplet is secondary contacts, realize depositing dust again, catch dirt and make
With, using gaseous pressure improve static pressure water atomization effect, increase droplet density, effectively improve 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 to 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 cut meet head on direction tilt 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 together be pushed ahead with development machine, when can exempt artificial mobile
Increased especially work improves operating efficiency, all the time can completely cut off dust again and in working face meet head on to locate, ensure development machine driver and
Rear portion tunnel operating personnel is in clean room, reaches the effect of lasting dust-separation.
Brief description of the drawings
Fig. 1 is the facilities and equipments overall structure diagram of the present invention；
Fig. 2 is the subregion dedusting function schematic diagram of the present invention；
In figure：1st, negative pressure secondary atomization dust-arrest device；2nd, air atomizing device for reducing dust；3rd ,-dust-separation mist screen generator；4th, dig
Enter machine cutting arm；5th, machine body of boring machine；6th, development machine driver；7th, cutterhead；8th, jet atomization dust suppression area；9th, air atomizing depositing dust
Area；10th, pressure Wu Ping dust-separations area.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention will be further described.
Embodiment 1：As shown in Figure 1-2, the present embodiment provides a kind of fully mechanized workface step subzone of atomization dust removal method, bag
Include and comprehensive pick face 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-separations 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
Comprise the following steps：
(a) 6 groups of negative pressure secondaries atomization dust-arrest devices 1 are uniformly laid in into cutting arm of tunneling machine 4 to be connected with machine body of boring machine 5
Place, arrangement air atomizing device for reducing dust 2 is in the forefront of machine body of boring machine 5 of return side, and in development machine driver position 6, front 80cm is dug
Enter on machine fuselage 5 and arrange dust-separation mist screen generator 3 along drift section direction, using dynamic pressure water as negative pressure secondary dust-arrest device 1 and every
The driving force of cloud screen generator 3, using comprehensive pick face static pressure water and press driving force of the wind as air atomizing device for reducing dust 2；
(b) when development machine will work, the secondary dust-arrest device 1 of negative-pressure atomizing is first started, dynamic pressure water mixes shape with dust suppressant
Into dust suppression agent solution, injection to the surrounding of cutterhead 7 at a high speed forms jet atomization dust suppression area 8, and droplet produces to tunneling machine cutting coal petrography
Raw dust carries out source wetting, suppression and sedimentation, and negative pressuren zone is internally formed in annular dust gathering arrester after the ejection of high velocity mist drip, from
Dust laden air around annular dust gathering arrester rear portion suction cutterhead, dust are caught after being acted on inside annular dust gathering arrester with droplet by secondary
Obtain, settle；
(c) air atomizing device 2 is opened, high pressure draught and droplet stream quickly spray to boring head return side, are formed empty
Aerosolization depositing dust area 9, atomizing effect being improved with gaseous pressure, increase droplet density lifts the capture ability to respirable dust,
Simultaneously with weakening the distinguished and admirable flow velocity of return side, the distinguished and admirable influence to rear portion dust-separation mist screen form of return side is reduced；
(d) dust-separation mist screen generator 3 is opened, forms pressure Wu Ping dust-separations area 10, is captured 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 °, to resist heading driver
Make the influence that the forced ventilating air in face shapes to dust-separation mist screen, while improve the relative collision probability of droplet and dust.With
The increase of dust migration distance, big dust particle constantly settle the raising of respirable dust accounting, it is desirable to which mist droplet particle size scope is 40 μm.
Claims (3)
1. a kind of fully mechanized workface step subzone of atomization dust removal method, it is characterised in that including comprehensive pick face meets head on to be divided into jet
Dust suppression area (8), air atomizing depositing dust area (9) and (10) three, pressure Wu Ping dust-separations area region are atomized, and jet mist is respectively adopted
The step atomization method collaboration for changing dust suppression, air atomizing depositing dust and pressure mist screen dust-separation is administered.
2. a kind of fully mechanized workface step subzone of atomization dust removal method according to claim 1, it is characterised in that described to penetrate
Stream atomization dust suppression, air atomizing depositing dust, pressure mist screen dust-separation collaboration administering method specifically include following steps：
A. negative pressure secondary atomization dust suppression dress is circumferentially uniformly laid in cutting arm of tunneling machine (4) and machine body of boring machine (5) junction
Put (1), arrangement air atomizing device for reducing dust (2) is in machine body of boring machine (5) forefront of return side, in development machine driver position (6)
On front 80-100cm machine body of boring machine (5) dust-separation mist screen generator (3), negative pressure secondary dust suppression are arranged along drift section direction
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 cut, the secondary dust-arrest device of negative-pressure atomizing (1) is started, dynamic pressure water is mixed to form with dust suppressant
Dust suppression agent solution, jet atomization dust suppression area (8) are formed around injection to cutterhead (7) at a high speed, droplet is to tunneling machine cutting coal petrography
Caused dust carries out source wetting, suppression and sedimentation, is internally formed negative pressure in annular dust gathering arrester after the ejection of high velocity mist drip, inhales
Enter dust laden air around cutterhead, acted on inside annular dust gathering arrester by droplet and dust by its secondary capturing, sedimentation；
C. air atomizing device (2) is opened, is sprayed to boring head return side, is formed air atomizing depositing dust area (9), with gas phase pressure
Power improves atomizing effect, and increase droplet density lifts the capture ability to respirable dust, while weakens 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, is formed pressure Wu Ping dust-separations area (10), is captured 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 resistance
The distinguished and admirable influence to the shaping of dust-separation mist screen of driving face forced ventilation, while the relative collision for improving droplet and dust is several
Rate.
A kind of 3. fully mechanized workface step subzone of atomization dust removal method according to claim 1 and 2, it is characterised in that institute
The mist droplet particle size scope that the dust-separation mist screen generator (3) stated sprays is 40-80 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710830195.6A CN107620607B (en) | 2017-09-12 | 2017-09-12 | A kind of fully mechanized workface step subzone of atomization dust removal method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710830195.6A CN107620607B (en) | 2017-09-12 | 2017-09-12 | A kind of fully mechanized workface step subzone of atomization dust removal method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107620607A true CN107620607A (en) | 2018-01-23 |
| CN107620607B CN107620607B (en) | 2019-04-30 |
Family
ID=61089691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710830195.6A Active CN107620607B (en) | 2017-09-12 | 2017-09-12 | A kind of fully mechanized workface step subzone of atomization dust removal method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107620607B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111396117A (en) * | 2020-05-14 | 2020-07-10 | 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 |
| CN111412011A (en) * | 2020-05-14 | 2020-07-14 | 徐州工程学院 | Fine water mist and liquid nitrogen mist linkage system for preventing and treating dust on roadway driving face |
| CN111878077A (en) * | 2020-08-25 | 2020-11-03 | 南京信息工程大学 | Cutting dust falling and reducing method for coal roadway fully-mechanized excavation working face |
| CN114151082A (en) * | 2021-10-27 | 2022-03-08 | 中国矿业大学 | Automatic high-pressure jet flow auxiliary rock breaking and foam dust suppression cutting pick device |
| CN114297794A (en) * | 2021-12-27 | 2022-04-08 | 太原理工大学 | Full-space intelligent comprehensive dust removal method for fully-mechanized excavation working 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 |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2208167C2 (en) * | 2001-07-17 | 2003-07-10 | Кузбасский государственный технический университет | Dust suppressing device |
| CN2934580Y (en) * | 2006-08-03 | 2007-08-15 | 兖州煤业股份有限公司 | Dust-removing device of fully-mechanized coal driving workface |
| CN2934581Y (en) * | 2006-08-08 | 2007-08-15 | 杨景旺 | Full-automatic assembled dust-precipitating device for fully-mechanized coal driving workface |
| CN102359376A (en) * | 2011-09-22 | 2012-02-22 | 中国矿业大学 | Air curtain and water mist linkage dust settling method for full mechanized workface |
| CN102536236A (en) * | 2011-12-30 | 2012-07-04 | 中国矿业大学 | Settling, isolating and removing integrated dust prevention method of fully mechanized excavation face |
| CN102852544A (en) * | 2012-09-28 | 2013-01-02 | 淮北矿业股份有限公司桃园煤矿 | Comprehensive dustproof technology of fully mechanized excavation face based on dust segregation |
| CN103912277A (en) * | 2014-04-01 | 2014-07-09 | 西安科技大学 | High-efficiency dust fall device and method of underground coal mine fully-mechanized excavating tunnel |
| CN204225888U (en) * | 2014-10-23 | 2015-03-25 | 山西中煤华晋能源有限责任公司 | Be applicable to the efficient Comprehensive Preventing dust falling system of the quick fully mechanized workface in difficult moistening coal seam |
| CN106703869A (en) * | 2016-12-16 | 2017-05-24 | 辽宁工程技术大学 | Comprehensive dust control system for fully-mechanized working face |
-
2017
- 2017-09-12 CN CN201710830195.6A patent/CN107620607B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2208167C2 (en) * | 2001-07-17 | 2003-07-10 | Кузбасский государственный технический университет | Dust suppressing device |
| CN2934580Y (en) * | 2006-08-03 | 2007-08-15 | 兖州煤业股份有限公司 | Dust-removing device of fully-mechanized coal driving workface |
| CN2934581Y (en) * | 2006-08-08 | 2007-08-15 | 杨景旺 | Full-automatic assembled dust-precipitating device for fully-mechanized coal driving workface |
| CN102359376A (en) * | 2011-09-22 | 2012-02-22 | 中国矿业大学 | Air curtain and water mist linkage dust settling method for full mechanized workface |
| CN102536236A (en) * | 2011-12-30 | 2012-07-04 | 中国矿业大学 | Settling, isolating and removing integrated dust prevention method of fully mechanized excavation face |
| CN102852544A (en) * | 2012-09-28 | 2013-01-02 | 淮北矿业股份有限公司桃园煤矿 | Comprehensive dustproof technology of fully mechanized excavation face based on dust segregation |
| CN103912277A (en) * | 2014-04-01 | 2014-07-09 | 西安科技大学 | High-efficiency dust fall device and method of underground coal mine fully-mechanized excavating tunnel |
| CN204225888U (en) * | 2014-10-23 | 2015-03-25 | 山西中煤华晋能源有限责任公司 | Be applicable to the efficient Comprehensive Preventing dust falling system of the quick fully mechanized workface in difficult moistening coal seam |
| CN106703869A (en) * | 2016-12-16 | 2017-05-24 | 辽宁工程技术大学 | Comprehensive dust control system for fully-mechanized working face |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111396117A (en) * | 2020-05-14 | 2020-07-10 | 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 |
| CN111412011A (en) * | 2020-05-14 | 2020-07-14 | 徐州工程学院 | Fine water mist and liquid nitrogen mist linkage system for preventing and treating dust on roadway driving 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 |
| CN111878077A (en) * | 2020-08-25 | 2020-11-03 | 南京信息工程大学 | Cutting dust falling and reducing method for coal roadway fully-mechanized excavation working 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 |
| CN114151082A (en) * | 2021-10-27 | 2022-03-08 | 中国矿业大学 | Automatic high-pressure jet flow auxiliary rock breaking and foam dust suppression cutting pick device |
| 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 |
| CN114297794A (en) * | 2021-12-27 | 2022-04-08 | 太原理工大学 | Full-space intelligent comprehensive dust removal method for fully-mechanized excavation working face |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107620607B (en) | 2019-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107620607B (en) | A kind of fully mechanized workface step subzone of atomization dust removal method | |
| CN102536236B (en) | Settling, isolating and removing integrated dust prevention method of fully mechanized excavation face | |
| CN101324190B (en) | Method and device for closely removing dust of development machine | |
| CN104373124B (en) | A kind of tunneling working face dust guard and dust-control method | |
| CN104564068A (en) | Comprehensive dust preventing and treating device for fully-mechanized coal mining working face with large mining height of coal mine | |
| CN108301799A (en) | A kind of hole pumping and mining dust-extraction unit and its application method | |
| CN108194124A (en) | A kind of walking is mining wind power ganged atomizing de-dusting apparatus and its application process | |
| CN107559007A (en) | A kind of digging laneway dust goes out except device | |
| CN102966367A (en) | Roadway construction equipment and dust removing device thereof | |
| CN201531270U (en) | Water spray surrounded dust collector of excavating machine | |
| CN109139007A (en) | A kind of spraying injection type dust-contained airflow control method and device for inhaling function with side | |
| CN202132042U (en) | Combined external spraying wind/water dust removing device for developing machine | |
| CN104632217A (en) | Wet dust removal and wind speed spraying haze-removing and dust-settling fan | |
| CN102359376A (en) | Air curtain and water mist linkage dust settling method for full mechanized workface | |
| CN107387152B (en) | A kind of fully mechanized workface ladder subzone of atomization dust pelletizing system | |
| CN206888979U (en) | One kind pick coal machine and its automatic dustfall device | |
| CN209430197U (en) | A kind of digging laneway dust goes out except equipment | |
| CN203769779U (en) | Novel semicircular piston entrainment dust-removal device | |
| CN111396117B (en) | Method for achieving dust settling through linkage of liquid nitrogen mist and fine water mist on fully mechanized excavation face | |
| CN206214959U (en) | Penetrate mist machine | |
| CN111412011B (en) | Fine water mist and liquid nitrogen mist linkage system for preventing and treating dust on roadway driving face | |
| CN203161280U (en) | Dust keeper for driving working face | |
| CN105201505B (en) | A kind of air water injection apparatus and control dirt system for coal-winning machine cut dust | |
| CN207093088U (en) | A kind of digging laneway dust goes out except device | |
| CN202970548U (en) | Gas jet flow dust collector for mine drilling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |