CN101845962B - Method and device for reducing dust in air return channel of coal mining working surface - Google Patents
Method and device for reducing dust in air return channel of coal mining working surface Download PDFInfo
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- CN101845962B CN101845962B CN 201010196482 CN201010196482A CN101845962B CN 101845962 B CN101845962 B CN 101845962B CN 201010196482 CN201010196482 CN 201010196482 CN 201010196482 A CN201010196482 A CN 201010196482A CN 101845962 B CN101845962 B CN 101845962B
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Abstract
The invention relates to a method and a device for reducing dust in an air return channel of a coal mining working surface. The device comprises a channel in which air flows in one direction; a water supply pipe in which pressure water flows is arranged on a top board of the channel along the width direction of the channel; at least one water orifice is uniformly distributed in the leeward direction of the water supply pipe; a dust-absorbing water curtain is arranged a certain distance away from a downwind direction of the water orifice and is hung on the top board of the channel; and the width and the height of the dust-absorbing water curtain are the same as those of the cross section of the channel. Water is sprayed on the dust-absorbing water curtain and a thin water film is formed on the mesh of the dust-absorbing water curtain so as to adsorb the dust in the flowing air. The method achieves higher dust absorbing efficiency than a method of directly spraying water in the flowing air. Since the size of the dust-absorbing water curtain is the same as that of the cross section of the channel, the dust in the air flowing through the entire cross section of the channel on which the dust-absorbing water curtain is hung is reduced, namely, the entire cross section of the entire channel is blocked by a water curtain. Therefore, a dust reducing effect is very remarkable.
Description
Technical field
The present invention relates to a kind of reducing dust in air return channel of coal mining working surface method and apparatus, is a kind of method and apparatus for the mine dedusting.
Background technology
In coal mine, coal-winning machine can produce a large amount of dust when fully mechanized coal face carries out coal mining activity, not only pollute working environment, and the harm very big to staff's healthy generation, and when airborne dust content reaches finite concentration, just have the danger of blast.Though external spraying or other measurements for reduction in coal-winning machine is provided with, still have a lot of dust especially fine solid particle come out with the drift of flowing of the air in the tunnel, these dust are easy to be sucked lung by human body and impair one's health.
In order to eliminate the great harm that Mine Dust coal supply mine belt comes, the measure of a little depositing dust waterings has all been adopted in each colliery, each ore deposit is except carrying out also will being no less than the water curtain of twice in the setting of coal-face air-return duct the necessary atomizing de-dusting to relevant place according to the rules regulation now.It is the Sprayable formation water curtain of a pipe multiple spot (welding a plurality of shower nozzles on a water pipe) that water curtain is all adopted in most of collieries, this is utilized a single pipe multipoint mode water curtain depositing dust mode to be difficult to the tunnel is formed full section covering, reason is shorter at the coverage of shower nozzle spraying, the water smoke of ejection is condensed into bigger water droplet rapidly, and the space between the water droplet is bigger, can not effectively adsorb the dust in the control.Even if the increasing injection flow rate also can't increase effective dust removing effects.Because it is limited that distance is penetrated in spraying, only spraying can not effectively connect the top, tunnel sternly fully, thereby can not reach desirable dust-laying effect.
Summary of the invention
For solving the prior art problem, the present invention proposes a kind of reducing dust in air return channel of coal mining working surface method and apparatus.The method of the invention hangs the way of dust suction cascade at the mine working face air return way.Shower nozzle water smoke is injected directly on the top of dust suction cascade, current have formed very thin moisture film one at the mesh of dust suction cascade from top to bottom, dust is with distinguished and admirable when flowing to the dust suction cascade, will be attached on the moisture film, dust can drop near the dust suction cascade after passing through the moisture film humidification rapidly, thereby has reached the effect of depositing dust.
The object of the present invention is achieved like this: a kind of reducing dust in air return channel of coal mining working surface device, comprise: have folk prescription to the mobile tunnel of air, the top board in described tunnel is equipped with the feed pipe that is connected with press water along the span length direction, a water jet is lacked in being evenly distributed on the wind direction of described feed pipe, leeward one segment distance at described water jet arranges the dust suction cascade, described dust suction cascade is hung on the top board in tunnel, described dust suction cascade wide and high and cross section, tunnel wide and high identical.
Use a kind of reducing dust in air return channel of coal mining working surface method of said apparatus, the step of described method is as follows:
The step of water spray: be used for water is sprayed at depositing dust cascade top uniformly;
The equally distributed step of water: the water that is used for being sprayed on depositing dust cascade top flows downward uniformly and has formed very thin moisture film one at mesh;
The step that dust is adsorbed: when flowing through the mesh of depositing dust cascade for the air that has dust, dust is attracted on the moisture film of mesh;
The step that dust falls: be used for being adsorbed on the water dust, with falling, realize reducing the dust in the moving air under water.
The beneficial effect that the present invention produces is: utilization of the present invention is sprayed at water on the dust suction cascade, makes on the mesh of dust suction cascade and forms very thin moisture film, and the dust in the moving air is adsorbed.This mode than directly in flow air the efficient of the mode dust suction of spray water higher.Because the size of dust suction cascade is identical with the cross section in tunnel, the air that hangs with whole cross section, dust suction cascade tunnel will be flow through and depositing dust can both be obtained, be about to the full section water curtain of whole tunnel and block, dust-laying effect is very remarkable.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the schematic diagram of the embodiment of the invention one described device for reducing dust;
Fig. 2 is the schematic diagram of application example device for reducing dust in the embodiment of the invention one, is as B direction view among Fig. 1;
Fig. 3 is the dust suction cascade schematic diagram that is made of braid of the embodiment of the invention two described device for reducing dust;
Fig. 4 is the dust suction cascade schematic diagram that is made of sheeting of the embodiment of the invention two described device for reducing dust.
The specific embodiment
Embodiment one:
Present embodiment is a kind of reducing dust in air return channel of coal mining working surface device, as shown in Figure 1.Present embodiment comprises: have folk prescription to the mobile tunnel 1 of air, the top board in described tunnel is equipped with the feed pipe 2 that is connected with press water along the span length direction, a water jet 3 is lacked in being evenly distributed on the wind direction of described feed pipe, leeward one segment distance at described water jet arranges dust suction cascade 4, described dust suction cascade is hung on the top board in tunnel, described dust suction cascade wide and high and cross section, tunnel wide and high identical.
The described device for reducing dust of present embodiment is to have increased the dust suction cascade on the basis of traditional device for reducing dust.There is suitable air to flow in the tunnel, and requires according to a certain direction to flow, as the indicated direction of arrow A among Fig. 1.Flow air is to keep the pure and fresh of air in the tunnel in order to make, and can take away the dust that produces in the coal mining.Traditional device for reducing dust only is water spray, utilizes the water smoke that forms, and absorbs dust in the air.This mode is difficult on the interface of whole tunnel and forms complete and effective, and water smoke uniformly.Water smoke can be condensed into bigger water droplet in the decline process, the space between the water droplet increases, and the effect that absorbs dust is reduced greatly.Certainly can increase injection flow rate, can increase other problem again but increase injection flow rate, therefore, increase injection flow rate and inadvisable.Present embodiment arranges a dust suction cascade by the leeward at the water jet of atomized water spray, sees Fig. 1.Evenly be covered with the mesh that penetrates on this dust suction cascade.When water is sprayed on the dust suction cascade, form very thin moisture film at mesh, and in mesh, form the bigger microenvironment of humidity, make the entrained dust of the air that flows through mesh by the water vapor absorption in the mesh microenvironment.The dust suction cascade can be made by flexible material, purpose be when personnel or vehicle by the time can lift easily, for example mine car by the time, what the dust suction cascade will nature is boosted by mine car, when mine car is left away, falls automatically, need not people's management.The height and width in the height and width of dust suction cascade and cross section, tunnel are suitable.This is for whole tunnel being completed into the water smoke curtain at an interface, improving the efficient of depositing dust.But in real work, can not fit together perfectly, some slits are always arranged.For make depositing dust have effect to reduce these slits as far as possible.Since the dust suction cascade is a kind of curtain, all can have various forms.The dust suction cascade can be that the neck line is hard material, steel bar etc. for example, and parallel is flexible, is similar to bamboo screen.In the time of above water is sprayed on, between each parallel, form the bigger microenvironment of water smoke, equally effectively dedusting.The dust suction cascade can also be that graticule is arranged all is that flexible material is made, and for example, the nylon rope grid type of working out is similar to screen window, and water is sprayed on can form the bigger microenvironment of water smoke equally in the grid.The dust suction cascade can also be the curtain of rubber, on be covered with mesh.
The application example of present embodiment: one high be 3 meters, wide is in 4.5 the tunnel dust suction cascade to be set, feed pipe adopts the 12.5mm iron pipe, according to span length, shower nozzle of every 450mm welding (welding in the same way side by side) is installed 9 shower nozzles altogether, it is 0.2MP that pressure of supply water is not less than each shower nozzle water spray pressure of 0.3MP * 9=2.7MP(, now pressing 0.3MP calculates), hang the dust suction cascade at the downwind side 600mm place of distance shower nozzle, as shown in Figure 2.The dust suction cascade will guarantee that full section covers.The material of dust suction cascade is anti-flammability colloid lace curtaining, and mesh is 6 * 6mm.Spray to dust suction cascade and back junction during spraying, jet angle is by 45 ° of calculating, the width that each shower nozzle is injected on the dust suction cascade is about 650mm, be 450 mm according to sprinkler spacing, can guarantee sprays when being sprayed on the netted curtain, and respectively there is the setting-out line of 100 mm on both sides, and then realized that the full section water curtain in tunnel blocks, effective depositing dust.After the dust suction cascade of above-mentioned example was installed, dust-laying effect was fairly obvious, and the breathing of underground operators has obtained very big improvement, and the flue coal dust in the air return way return has obtained handling timely and effectively, and mine dust has obtained the control of essence.According to following measured data as can be known:
1, hang water curtain curtain dust concentration (getting the numerical value in producing for 3 times) before:
(1) detection site: 502 air return way;
Detection time: on August 10th, 2009
Total dust concentration: 8.2 mg/m
3(transfiniting 0.2)
Exhale dust concentration: 5.0 mg/m
3(having reached the value of defining)
(2) detection site: 502 air return way;
Detection time: on August 25th, 2009
Total dust concentration: 8.0 mg/m
3(having reached the value of defining)
Exhale dust concentration: 4.9 mg/m
3(having approached the value of defining)
(3) detection site: 502 air return way;
Detection time: on September 10th, 2009
Total dust concentration: 7.8 mg/m
3(qualified substantially)
Exhale dust concentration: 4.8 mg/m
3(qualified substantially)
2, hang water curtain curtain dust concentration (getting the numerical value in producing for 3 times) afterwards:
(1) detection site: 502 air return way;
Detection time: on October 11st, 2009
Total dust concentration: 7.0mg/m
3(qualified)
Exhale dust concentration: 4.2 mg/m
3(qualified)
(2) detection site: 502 air return way;
Detection time: on November 10th, 2009
Total dust concentration: 7.2 mg/m
3(qualified)
Exhale dust concentration: 4.6 mg/m
3(qualified)
(3) detection site: 502 air return way;
Detection time: on November 25th, 2010
Total dust concentration: 7.2 mg/m
3(qualified)
Exhale dust concentration: 4.5 mg/m
3(qualified)
From above-mentioned data as can be seen: total dust concentration descends 10.8%; Exhale dust concentration to descend: 9.5%, effect is fairly obvious.
Embodiment two:
Present embodiment is the improvement of embodiment one, is that the described device for reducing dust of embodiment is about the refinement of dust suction cascade material, shown in Fig. 3,4.The described dust suction cascade of present embodiment is made up of thin flexible material, and mesh evenly gathers on the flexible material surface.
The described dust suction cascade of present embodiment is made up of thin flexible material, and thin flexible material can be the flaky material of north material, rubber, north glue, and thickness does not wait to 40 millimeters at 5 millimeters.Thinner material damages easily, but lifts merrilyyer and lightheartedly, is suitable for the walkway.Thicker material is because the length of through hole is longer, and the water smoke of formation is better, and not fragile, but lifts heavylier, is suitable for the tunnel that vehicle passes through.
The described through hole of present embodiment, can be the through hole that braid interval between the graticule in the braiding process forms, as shown in Figure 2, also can be the flaky material formation of evenly punching, (through hole of expression is the expression of exaggeration among Fig. 2,3, and the actual conditions through hole is much smaller) as shown in Figure 3.
Embodiment three:
Present embodiment is the improvement of embodiment two, is that embodiment two is about the refinement of flexible material.The described thin flexible material of present embodiment is anti-flammability colloid lace curtaining.
Embodiment four:
Present embodiment is to use a kind of reducing dust in air return channel of coal mining working surface method of the described device of above-described embodiment.The step of the described method of present embodiment is as follows:
1) Pen Shui step: be used for water is sprayed at depositing dust cascade top uniformly.Clean water is sprayed at the top of dust suction cascade.The top that why water is sprayed on the dust suction cascade is owing to be convenient to arrange sparge pipe and water jet.Certainly can arrange sparge pipe and water jet in the both sides in tunnel, but like that the spray of position intermediate water be sprayed on the top of dust suction cascade less than, water can gravity, water is dirty naturally.
2) the equally distributed step of water: the water that is used for being sprayed on depositing dust cascade top flows downward uniformly and has formed very thin moisture film one at mesh.Accumulate in during water flows downward on the mesh, form the water surface, and in mesh, form the bigger microenvironment of humidity.
3) step that is adsorbed of dust: when the air that is used for having dust flow through the mesh of depositing dust cascade, dust was attracted on the moisture film of mesh.When the air that has a dust flow through mesh, the water smoke in the microenvironment in the mesh is very easy to be accumulated on the airborne dust, formed bigger water droplet and fell, and the formation of this and rain is similar, thinks that in macroscopic view dust is adsorbed on the moisture film.
4) step of dust whereabouts: be used for being adsorbed on the water dust, with falling, realize reducing the dust in the moving air under water.Because water constantly sprays from water jet, water flowing from top to bottom constantly arranged, play the effect of washing away the dust suction cascade, after the water in the mesh has absorbed dust, just swept away the dust suction cascade by the current of back like this, flow to the dust suction cascade below.The following dust collection that can be special of dust suction cascade is implemented.But under normal conditions, the ground in tunnel is very coarse, and other flowing water is arranged, and can in linely have the flowing water of dust.
Said process is the fragment of a successive process, and this fragment is continuously moved, and forms whole process.
It should be noted that at last, below only unrestricted in order to technical scheme of the present invention to be described, although with reference to the preferred arrangement scheme the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention (such as arrangement of the material of dust suction cascade, profile, size, water pipe spout etc.), and not break away from the spirit and scope of technical solution of the present invention.
Claims (2)
1. reducing dust in air return channel of coal mining working surface device, comprise: have folk prescription to the mobile tunnel of air, the top board in described tunnel is equipped with the feed pipe that is connected with press water along the span length direction, be evenly distributed to few water jet on the leeward direction of described feed pipe, leeward one segment distance at described water jet arranges the dust suction cascade, described dust suction cascade is hung on the top board in tunnel, described dust suction cascade wide and high and cross section, tunnel wide and high identical, described water jet sprays to dust suction cascade and back junction when spraying, jet angle is 45 °, it is characterized in that, described dust suction cascade is made up of thin flexible material, the evenly densely covered mesh in flexible material surface, described thin flexible material is anti-flammability colloid lace curtaining; Described dust suction cascade is high 3 meters, and is wide 4.5 meters, feed pipe diameter 12.5mm, and shower nozzle of every 450mm welding is established 9 shower nozzles altogether, hangs the dust suction cascade at the downwind side 600mm place of distance shower nozzle, and the mesh of described dust suction cascade is 6 * 6mm.
2. right to use requires a kind of reducing dust in air return channel of coal mining working surface method of 1 described device, and the step of described method is as follows:
The step of water spray: be used for water is sprayed at dust suction cascade top uniformly;
The equally distributed step of water: the water that is used for being sprayed on dust suction cascade top flows downward uniformly and has formed very thin moisture film one at mesh;
The step that dust is adsorbed: when flowing through the mesh of dust suction cascade for the air that has dust, dust is attracted on the moisture film of mesh;
The step that dust falls: be used for being adsorbed on the water dust, with falling, realize reducing the dust in the moving air under water;
It is characterized in that:
In the step of described water spray, respectively there is the setting-out line of 100 mm on the water smoke both sides that each water jet is sprayed on the dust suction cascade, and then have realized that the full section water curtain in tunnel blocks.
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| CN 201010196482 CN101845962B (en) | 2010-06-10 | 2010-06-10 | Method and device for reducing dust in air return channel of coal mining working surface |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102182458A (en) * | 2011-04-14 | 2011-09-14 | 淮北矿业股份有限公司 | Induced draft water curtain dust removing device for intercepted coal mining machine |
| CN102562129B (en) * | 2012-02-21 | 2014-12-10 | 中南大学 | Dust removal device for intake air of mine |
| CN104500142A (en) * | 2014-12-23 | 2015-04-08 | 常熟市矿山机电器材有限公司 | Underground coal mine dust measuring device |
| CN109209467B (en) * | 2018-07-18 | 2021-02-23 | 山东大学 | Full-automatic curtain dust collector in suspension type tunnel |
| CN111502736A (en) * | 2020-04-24 | 2020-08-07 | 中煤科工集团重庆研究院有限公司 | Dust source automatic isolation spraying dust control method and device |
| CN117569862A (en) * | 2023-11-17 | 2024-02-20 | 中交一公局集团有限公司 | Tunnel construction device and process for advanced small pilot tunnel and expanded excavation |
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| RU2005138457A (en) * | 2005-12-09 | 2007-06-20 | Виктор Иванович Попов (RU) | WATER BLOCK |
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| CN201439718U (en) * | 2009-07-23 | 2010-04-21 | 上海大屯能源股份有限公司 | Double dustproof water curtain for cutting coal on coal mining work surface |
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| DE2912326A1 (en) * | 1979-03-28 | 1980-10-02 | Nalco Chemie Gmbh Deutsche | Polyelectrolyte addn. for wet dust control - e.g. in mining, pref. using opt. modified acrylamide! polymer or poly:amine |
| RU2005138457A (en) * | 2005-12-09 | 2007-06-20 | Виктор Иванович Попов (RU) | WATER BLOCK |
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Address after: 100013 Beijing city Chaoyang District Hepingli 13 No. 35 coal Street building room 1607 Patentee after: BEIJING TIANDI HUATAI MINING MANAGEMENT CO., LTD. Address before: 100013 Beijing city Chaoyang District Hepingli 13 No. 35 coal Street building room 1607 Patentee before: Beijing Tiandi Huatai Mining Engineering & Technology Co., Ltd. |