CN109139007B - Spray injection type dust-containing airflow control method and device with side suction function - Google Patents
Spray injection type dust-containing airflow control method and device with side suction function Download PDFInfo
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- CN109139007B CN109139007B CN201811107523.0A CN201811107523A CN109139007B CN 109139007 B CN109139007 B CN 109139007B CN 201811107523 A CN201811107523 A CN 201811107523A CN 109139007 B CN109139007 B CN 109139007B
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- 238000002347 injection Methods 0.000 title claims abstract description 19
- 239000007924 injection Substances 0.000 title claims abstract description 19
- 239000007921 spray Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000428 dust Substances 0.000 title abstract description 71
- 239000003245 coal Substances 0.000 claims abstract description 60
- 238000005065 mining Methods 0.000 claims abstract description 33
- 238000005507 spraying Methods 0.000 claims abstract description 28
- 239000003595 mist Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 5
- 241000201246 Cycloloma atriplicifolium Species 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 description 7
- 238000011160 research Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/22—Equipment for preventing the formation of, or for removal of, dust
- E21C35/223—Equipment associated with mining machines for sucking dust-laden air from the cutting area, with or without cleaning of the air
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/04—Spraying barriers
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Cleaning Of Streets, Tracks, Or Beaches (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to the field of dust removal in coal mining, in particular to a method and a device for controlling a spray injection type dust-containing airflow with a side suction function. The invention adopts the dust-blocking curtain to physically block dust generated by coal cutting of the roller of the coal mining machine, utilizes a group of downwind spray arranged on a cantilever rod fixed relative to the coal mining machine to inject dust airflow, and also arranges a set of side suction device below the cantilever rod, and the side suction cover is arranged in a dust concentration area. One part of dusty airflow is purified through the side suction device, and the other part of dusty airflow is ejected through the downwind spraying and the side suction device together and moves along one side of the coal wall, so that the problem of insufficient ejection air volume caused by the limitation of the controlled dust length of the conventional dusty airflow control device is solved, and the dust concentration at a driver of a coal mining machine and the downwind side of the machine body is greatly reduced.
Description
Technical Field
The invention relates to the field of coal mine dust removal, in particular to a method and a device for controlling a spray injection type dust-containing airflow with a side suction function.
Background
The coal cutting and caving impact dust production of the roller at the windward side during the operation of the coal mining machine are key points and difficulties in dust control of the fully mechanized coal mining face at present. Particularly, in the process of cutting coal by the coal mining machine against the wind, the roller at the windward side cuts the top coal to cause the front area to collapse and impact very seriously to generate dust, high-concentration dust-containing airflow can be formed under the action of the wind flow and is rapidly transported to the position of the rocker arm, then the dust is prevented by the lifted rocker arm and turns over the cable groove, and finally the dust is diffused to one side of the pedestrian path, so that the dust concentration in a driver of the coal mining machine and the downwind operation area far exceeds the relevant national regulations, and the safety production of mines and the physical and mental health of operators are seriously threatened.
At present, a dust-containing airflow control technology is an effective measure for controlling coal-cutting dust of a coal cutter, foreign countries such as the United states and Australia realize the control of the dust-containing airflow by arranging a plurality of groups of downwind sprays facing to a coal wall at the windward end and the machine body of the coal cutter, and the dust concentration at a driver of the coal cutter can be obviously reduced; by using the technology, Chongqing research institute Limited company of China's coal science and industry group develops field tests in one mine of Yang coal group in 2008, and obtains about 80% of dust reduction effect, but does not effectively solve the field process matching problem of the dust-containing airflow control device; the Chongqing research institute Co., Ltd of the later Zhongshikejiu research institute develops further research in coal mines of Shanxi Zhonghua Jinwang Jialing, and designs a set of dust-containing airflow control device based on a dust-blocking curtain and injection spraying, so that the dust concentration of a driver of a coal mining machine can be reduced by more than about 80%, the reliability and the applicability can meet the severe underground operation environment of the coal mine, and the field process matching problem of the dust-containing airflow control technology is effectively solved. However, in consideration of reducing the influence of coal wall caving and over-end, the device has a length furthest extending to the edge of the upper air drum, so that the injection air volume is insufficient, and under the condition of large dust production of a working face, a part of dust can diffuse out from the foremost end of the device to a pedestrian path, thereby polluting the working environment of a driver in the middle of the coal mining machine.
Disclosure of Invention
The invention aims to overcome the problems that the spraying ejection wind power is insufficient in the prior art, so that dust diffuses out of the foremost end of the device and diffuses to a pedestrian path, and the operation environment of a driver in the middle of a coal mining machine is polluted,
the method and the device for controlling the dust-containing airflow by spraying injection with the side-suction function can effectively enhance the injection wind power of the fully mechanized coal mining face and achieve the purpose of effectively controlling the dust-containing airflow to move along the coal wall.
In order to achieve the above purpose, the invention provides the following technical scheme:
a spray injection type dust-containing airflow control method and device with a side suction function comprises a cantilever rod and a dust blocking curtain, wherein the cantilever rod is fixed on an air-supply side travelling part of a coal mining machine, the dust blocking curtain is hung on the side face of the cantilever rod, and the dust blocking curtain is used for blocking dust generated by coal cutting and coal block collapse in a semi-closed space. The dust-containing airflow control method adopting side suction and spray injection simultaneously adopts the following two modes to inject the dust airflow in the area near the upper air roller of the coal mining machine:
injecting dust airflow at the upper part of an area near an upper air roller of a coal mining machine by adopting a downwind spraying device; the downwind spraying device utilizes the high-speed moving water mist flow sprayed by the nozzle to guide the dust-containing air flow to move along one side of the coal wall, and meanwhile, the sprayed water mist flow can wet and settle dust.
Secondly, performing suction type injection on the dusty airflow at the lower part of the area near the upper air drum of the coal mining machine by adopting a side-suction injection device; the side suction device sucks high-concentration dust-containing airflow formed when the air-supply side roller of the fully mechanized mining face coal mining machine cuts coal into the side suction device, and then the high-concentration dust-containing airflow is ejected out from an outlet of the side suction device to form ejection airflow so as to guide the dust-containing airflow to move along the coal wall.
Further, in the first mode, the downwind spraying device is mounted on the cantilever rod, and the downwind spraying device includes a plurality of nozzles axially arranged along the cantilever rod. The effect is: the water mist ejected by the nozzles can form a water mist wall, the water mist and the dust blocking curtain control dust in a semi-closed space, on the other hand, the ejected water mist can moisten the dust and settle the dust, and more importantly, the ejected water mist forms ejection airflow and ejects the dust-containing airflow to move along one side of the coal wall.
Furthermore, in the second mode, the side-suction spraying device comprises a side suction cover, a side suction pipe and a spraying ejector, wherein the side suction cover is connected with one end of the side suction pipe, and the spraying ejector is connected with the other end of the side suction pipe. The effect is: the side suction cover can better play the side suction effect, and the side suction pipe can prolong the length of the whole side suction spraying device, so that the spraying ejector can be arranged at a proper position on the machine surface of the coal mining machine, and can be well matched with coal mining machines with different structures.
Furthermore, the side suction cover is fixed below the cantilever rod, and the position of the side suction cover below the cantilever rod can be adjusted. The opening position of the side suction cover can be positioned in a high-concentration dust accumulation area by adjusting the position of the side suction cover below the cantilever rod.
Compared with the prior art, the invention has the beneficial effects that:
the invention effectively solves the problem of insufficient ejection air quantity caused by the limited controlled dust length of the existing dust-containing air flow control device by adopting the downwind spraying device to eject dust-containing air flow and adopting the side-suction ejecting device to suck the dust-containing air flow, solves the problem that dust at an upper air roller of a coal mining machine is diffused to a sidewalk, greatly reduces the dust concentration at a driver at the middle position of the sidewalk coal mining machine, and has the total dust falling efficiency of more than 85 percent and the respiratory dust falling efficiency of more than 80 percent.
Description of the drawings:
FIG. 1 is a schematic front view of the present invention
FIG. 2 is a schematic top view of the present invention
FIG. 3 is a schematic view of a spray injector
FIG. 4 is a schematic view of a side suction hood
The labels in the figure are: 1-coal cutter, 2-cantilever rod, 3-side suction hood, 4-side suction pipe, 5-spray ejector,
6-downwind spraying device, 7-dust-blocking curtain, 8-roller, 9-rocker arm and 10-injection nozzle.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-2, a cantilever rod 2 is fixed at the end of a traveling part at one side of an upper wind roller of a coal mining machine 1, a dust blocking curtain 7 is hung on the cantilever rod 2, a downwind spraying device 6 is installed on the cantilever rod 2, and a plurality of nozzles of the downwind spraying device 6 are arranged along the axial direction of the cantilever rod 2. The side-suction spraying device comprises a side suction cover 3, a side suction pipe 4 and a spraying ejector 5, wherein the side suction pipe 4 is of a tubular structure, one end of the side suction pipe 4 is connected with the side suction cover 3, and the other end of the side suction pipe is connected with the spraying ejector 5. As shown in fig. 3-4, the side draft shield 3 is a large-opening disc-shaped structure, the spray ejector 5 is provided with an ejector nozzle 10 along the radial direction of the outlet, the side draft shield 3 is arranged below the cantilever rod 2, the specific position of the side draft shield 3 below the cantilever rod 2 can be adjusted, the side draft shield 3 can be just in a dust accumulation area, and the spray ejector 5 is arranged behind the rocker arm 9 and in front of a driver of a coal mining machine, so that dust-containing air flow can be ejected again and moved along the coal wall, and the dust content of the driver of the coal mining machine is reduced.
When the coal mining machine works, the direction A is the migration direction of the dusty airflow, when the roller 8 on the windward side of the coal mining machine cuts top coal, dust generated by coal cutting and dust generated by coal block collapse are mixed in air to form the dusty airflow, in order to prevent a large amount of dusty airflow from escaping to a sidewalk, the dust-blocking curtain 7 can physically block part of dust, and the water mist flow ejected by the downwind spraying device 6 can inject the dusty airflow to guide the dusty airflow to migrate along the coal wall on one side of the roller 8; on the other hand, the water mist flow sprayed by the downwind spraying device 6 can wet and settle the dusty air flow. The water mist flow ejected by the spraying ejector 5 can form negative pressure at the side suction hood 3, a large amount of dust is gathered in a semi-closed space formed by the dust blocking curtain 7 and the rocker arm 9, and the dust-containing air flow is sucked into the side suction hood 3, flows through the side suction pipe 4 and is ejected by the spraying ejector 5. When dusty airflow of the fully mechanized mining face passes through the rocker arm 9 along the direction A, the part of dusty airflow after being blocked climbs along the rocker arm 9, water mist flow ejected by the spray ejector 5 further ejects dust which climbs along the part of dusty airflow and moves along one side of a coal wall, and meanwhile, the dusty airflow is wetted and settled, so that the dust concentration of a driver in the middle of the coal mining machine is effectively reduced.
Claims (3)
1. The utility model provides a spraying injection type dusty airflow control method with side suction function, includes the cantilever bar, on the cantilever bar was fixed in the windward side walking portion of coal-winning machine, still included the dust-blocking curtain, the dust-blocking curtain hangs cantilever bar side, its characterized in that has adopted following two kinds of modes to draw the dusty airflow in the near region of the windward cylinder of coal-winning machine simultaneously:
the method comprises the following steps that firstly, a downwind spraying device is adopted to inject dusty airflow at the upper part of an area near an upper wind roller of a coal mining machine, so that the dusty airflow at the upper part of a fully mechanized mining face flows along the coal wall, the downwind spraying device comprises a plurality of nozzles, and water mist sprayed by the nozzles can inject the dusty airflow;
performing suction type injection on the dusty airflow at the lower part of the area near the upper air roller of the coal mining machine by adopting a side-suction injection device, wherein one end of the side-suction injection device is provided with an inlet, and the other end of the side-suction injection device is provided with an outlet, and the side-suction injection device can suck the dusty airflow from the inlet and then eject the dusty airflow from the outlet after purification treatment; the side suction ejector device comprises a side suction cover, a side suction pipe and a spray ejector, wherein the side suction cover is connected with one end of the side suction pipe, and the spray ejector is connected with the other end of the side suction pipe; the spray ejector is arranged behind the rocker arm and in front of a driver of the coal mining machine.
2. The method for controlling a dust-laden air flow with a side draft effect according to claim 1, wherein in the first mode, the downwind spraying device is mounted on the cantilever rod, and the plurality of nozzles are arranged along the axial direction of the cantilever rod.
3. The method for controlling a spray-induced dust-laden airflow with a side draft function according to claim 2, wherein the side draft shield is fixed below the cantilever bar, and a position of the side draft shield below the cantilever bar can be adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107523.0A CN109139007B (en) | 2018-09-21 | 2018-09-21 | Spray injection type dust-containing airflow control method and device with side suction function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811107523.0A CN109139007B (en) | 2018-09-21 | 2018-09-21 | Spray injection type dust-containing airflow control method and device with side suction function |
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| CN109139007A CN109139007A (en) | 2019-01-04 |
| CN109139007B true CN109139007B (en) | 2020-05-12 |
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| CN110180291B (en) * | 2019-06-18 | 2024-05-17 | 浦塔环保科技（上海）有限公司 | Dust collection and injection equipment and opposite spraying dust removal system comprising same |
| CN111075446B (en) * | 2019-12-09 | 2021-09-28 | 中煤科工集团重庆研究院有限公司 | High-efficient dust extraction device suitable for even adopt quick-witted low level dirt source |
| CN111677545B (en) * | 2020-05-28 | 2021-06-25 | 安徽理工大学 | Combine and adopt working face gas-liquid spraying dust fall system |
| CN111894581B (en) * | 2020-08-26 | 2022-09-09 | 中煤科工集团重庆研究院有限公司 | Coal cutter coal cutting and dust production flow separation control dust and dust falling method |
| CN114893180A (en) * | 2022-04-26 | 2022-08-12 | 秦兵文 | Dust device and coal-winning machine |
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