Dust removal system for fully-mechanized excavation face of coal mine

Abstract

The invention discloses a dust removal system for a fully-mechanized excavation face of a coal mine, and relates to the technical field of dust removal of coal mines. One end of the dust suction pipe is communicated with the agglomeration chamber, and the other end of the dust suction pipe is arranged in dust-containing air at the fully-mechanized excavation face; an exhaust inlet of the wet dust removal fan is communicated with the agglomeration chamber; the sound wave generator is arranged in the agglomeration chamber, and the sound wave generator is used for generating sound waves; the spraying unit comprises a storage tank and a first spraying device arranged in the agglomeration chamber, the storage tank is used for storing a dust falling chemical reagent, the first spraying device is communicated with the storage tank, and the first spraying device is used for atomizing the dust falling chemical reagent and spraying the atomized dust falling chemical reagent into the agglomeration chamber. Dust-containing air entering the agglomeration chamber is promoted to be agglomerated through sound waves and atomized dust-falling chemical reagent liquid drops, and the dust removal effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine dust removal, and particularly to a dust removal system for a fully mechanized heading face in a coal mine. Background Art

[0002] In recent years, with the continuous expansion of the scale of coal resource exploitation, the problem of dust pollution in the fully mechanized heading face of coal mines has become increasingly prominent. The over-standard rate of coal mine dust concentration has been high for a long time. Among them, the proportion of respirable dust (particle size ≤ 5μm) exceeds 40%, which has become the primary factor threatening the occupational health of miners. Although the traditional wet dust removal technology can effectively reduce the total dust concentration, the capture efficiency for respirable dust is only 65%-80%, which is difficult to meet the limit requirement of the "Coal Mine Safety Regulations" for the respirable dust concentration ≤ 2.5mg / m 3 . In addition, the existence of high-concentration respirable dust will significantly increase the equivalent coefficient of gas explosion and increase the risk of mine disasters.

[0003] At present, the coal mine dust reduction technology is mainly divided into three categories: (1) Ventilation dust removal dilutes and diffuses dust through air flow, but the purification effect on local high-concentration dust areas is limited; (2) Dust removal by coal seam water injection. The coal seam water injection technology has poor environmental adaptability, and water cannot spread and penetrate well on the surface of coal dust, resulting in a large amount of respirable dust that cannot be effectively bonded and settled by water, thus reducing the dust removal effect; (3) The traditional spray dust removal technology (such as internal and external sprays, water curtains, etc.) has limited capture effect on respirable dust with a particle size less than 5μm (which can directly enter the alveoli). The main reason is that the particle size of water droplets does not match well with the particle size of respirable dust, and the dust has strong hydrophobicity and is difficult to be effectively wetted and coagulated.

[0004] In summary, the current dust removal effect in coal mines needs to be improved urgently to ensure the health of workers and reduce the risk of mine disasters. Summary of the Invention

[0005] The purpose of the present invention is to provide a dust removal system for a fully mechanized heading face in a coal mine to solve the problems existing in the above-mentioned prior art and improve the dust removal effect of the fully mechanized heading face in a coal mine.

[0006] To achieve the above purpose, the present invention provides the following solution:

[0007] The present invention provides a dust removal system for a fully mechanized heading face in a coal mine, including:

[0008] An agglomeration chamber, the agglomeration chamber is airtight;

[0009] A dust suction pipe, one end of the dust suction pipe is communicated with the agglomeration chamber, and the other end is used for being arranged in the dusty air at the fully mechanized heading face;

[0010] A wet dust removal fan, the suction port of the wet dust removal fan is communicated with the agglomeration chamber;

[0011] An acoustic wave generator, which is arranged in the agglomeration chamber and is used to generate acoustic waves.

[0012] A spraying unit, which includes a storage tank and a first spraying device arranged in the agglomeration chamber. The storage tank is used to store the dust suppression chemical reagent, the first spraying device is communicated with the storage tank, and the first spraying device is used to atomize and spray the dust suppression chemical reagent in the agglomeration chamber.

[0013] Preferably, it further includes a ventilation unit, which includes a ventilator and a ventilation pipe with one end communicated with the air outlet of the ventilator. The ventilator is used to pump fresh air into the fully mechanized heading face through the ventilation pipe.

[0014] Preferably, an air curtain is installed at one end of the ventilation pipe close to the fully mechanized heading face, and the air curtain is used to prevent the dust-containing air at the fully mechanized heading face from entering the ventilation pipe.

[0015] Preferably, the air curtain includes an air pump and a plurality of nozzles. All the nozzles are installed on the ventilation pipe. All the nozzles are located at the same cross-section of the ventilation pipe and are evenly distributed along the circumferential direction of the ventilation pipe. The air inlet of each nozzle is communicated with the air outlet of the air pump, and the air outlet of the nozzle is located inside the ventilation pipe.

[0016] Preferably, the communication port between the dust suction pipe and the agglomeration chamber is the first communication port, and the communication port between the wet dust removal fan and the agglomeration chamber is the second communication port. The first communication port is located at one end of the agglomeration chamber, and the second communication port is located at the other end of the agglomeration chamber.

[0017] The acoustic wave generator is close to the second communication port. The atomized dust suppression chemical reagent sprayed by the first spraying device is located between the acoustic wave generator and the first communication port, and the acoustic wave generated by the acoustic wave generator is directed towards the first communication port.

[0018] Preferably, a vacuum sound insulation layer is provided on all the chamber walls of the agglomeration chamber.

[0019] Preferably, it further includes a track, which is connected to the frame of the conveyor belt in the coal mine. The bottom ends of the wet dust removal fan, the agglomeration chamber and the storage tank are respectively provided with rollers, and the rollers are in rolling cooperation with the track.

[0020] Preferably, the dust suppression chemical reagent includes water and xanthan gum, and the concentration ratio of xanthan gum in the dust suppression chemical reagent is 0.05%.

[0021] Preferably, the dust-removing chemical reagent comprises water, sodium dodecyl sulfate and xanthan gum. The concentration ratio of sodium dodecyl sulfate in the dust-removing chemical reagent is 0.05%, and the concentration ratio of xanthan gum in the dust-removing chemical reagent is 0.05%.

[0022] Preferably, the dust-removing chemical reagent comprises water, sodium dodecylbenzenesulfonate and xanthan gum. The concentration ratio of sodium dodecylbenzenesulfonate in the dust-removing chemical reagent is 0.03%, and the concentration ratio of xanthan gum in the dust-removing chemical reagent is 0.05%.

[0023] The present invention has achieved the following technical effects compared with the prior art:

[0024] The dust removal system for fully-mechanized heading face of the present invention generates sound waves through the sound wave generator in the agglomeration chamber, causing the dust particles in the dusty air to vibrate, increasing the collision probability between the dust particles, and thus promoting the agglomeration of the dust particles. At the same time, the spraying unit atomizes and sprays the dust-removing chemical reagent in the agglomeration chamber. The dust-removing chemical reagent can further bond the dust particles, making the respirable dust with small particle size agglomerate into larger particle size particles. The dust particles after agglomeration are more easily captured by the subsequent wet dust removal fan, which can more effectively reduce the concentration of respirable dust and ensure the occupational health of miners.

[0025] Further, the dusty air at the fully-mechanized heading face is sucked into the agglomeration chamber through the dust suction pipe for treatment. The dust suction pipe can specifically suck the local high-concentration dust area, avoiding the limitation of relying only on the air flow to dilute and diffuse the dust in ventilation dust removal, and effectively solving the problem of purification of local high-concentration dust.

[0026] Further, the ventilation unit is provided, including a ventilator and a ventilation pipe. The ventilator pumps fresh air into the fully-mechanized heading face through the ventilation pipe, ensuring sufficient fresh air supply for the fully-mechanized heading face and improving the working environment.

[0027] Further, the air curtain provided on the ventilation pipe can prevent the dusty air at the fully-mechanized heading face from entering the ventilation pipe.

[0028] Further, the vacuum sound insulation layer provided on each chamber wall of the agglomeration chamber can not only prevent the influence of environmental noise on the dust removal effect in the agglomeration chamber, but also prevent the sound waves generated in the agglomeration chamber from propagating to the outside of the agglomeration chamber, isolating the sound waves and preventing noise pollution to the heading face environment.

[0029] Further, the wet dust removal fan, the agglomeration chamber and the storage tank are all arranged on the track, so that the entire dust removal system can move along the track, facilitating the layout and adjustment of the equipment at the fully-mechanized heading face, adapting to the complex and changeable working environment in the coal mine underground, and improving the flexibility and operability of the equipment. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic structural diagram of the dust removal system for the fully mechanized heading face in a coal mine of the present invention;

[0032] Figure 2 It is a schematic structural diagram of the agglomeration chamber in the dust removal system for the fully mechanized heading face in a coal mine of the present invention;

[0033] In the figure: 1, roadheader; 2, dust suction pipe; 3, agglomeration chamber; 4, storage tank; 5, wet dust removal fan; 6, vacuum sound insulation layer; 7, track; 8, ventilation pipe; 9, sound wave generator; 10, first spray device. Detailed implementation manners

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] The purpose of the present invention is to provide a dust removal system for the fully mechanized heading face in a coal mine to solve the problems existing in the above prior art and improve the dust removal effect of the fully mechanized heading face in a coal mine.

[0036] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0037] As Figures 1 to 2 shown, this embodiment provides a dust removal system for the fully mechanized heading face in a coal mine, including:

[0038] An agglomeration chamber 3, and the agglomeration chamber 3 is airtight;

[0039] A dust suction pipe 2, one end of the dust suction pipe 2 is communicated with the agglomeration chamber 3, and the other end is used for being arranged in the dusty air at the fully mechanized heading face;

[0040] A wet dust removal fan 5, and the suction port of the wet dust removal fan 5 is communicated with the agglomeration chamber 3;

[0041] A sound wave generator 9, the sound wave generator 9 is arranged in the agglomeration chamber 3, and the sound wave generator 9 is used for generating sound waves;

[0042] A spraying unit, the spraying unit includes a storage tank 4 and a first spraying device 10 arranged in the agglomeration chamber 3. The storage tank 4 is used to store the dust suppression chemical reagent. The first spraying device 10 is communicated with the storage tank 4, and the first spraying device 10 is used to atomize and spray the dust suppression chemical reagent in the agglomeration chamber 3.

[0043] It should be noted that the wet dust removal fan 5 is a commercially available product well-known to those skilled in the art, and the specific structure and working principle of the wet dust removal fan 5 will not be elaborated in this embodiment.

[0044] In an alternative embodiment of the present embodiment, preferably, a ventilation unit is further included. The ventilation unit includes a ventilator and a ventilation pipe 8 with one end communicated with the air outlet of the ventilator. The ventilator is used to pump fresh air into the fully-mechanized heading face through the ventilation pipe 8. The ventilator pumps fresh air into the fully-mechanized heading face through the ventilation pipe 8, ensuring sufficient fresh air supply in the fully-mechanized heading face and improving the working environment.

[0045] In an alternative embodiment of the present embodiment, preferably, an air curtain is installed at one end of the ventilation pipe 8 close to the fully-mechanized heading face. The air curtain is used to prevent the dust-containing air at the fully-mechanized heading face from entering the ventilation pipe 8. The air curtain is arranged in the ventilation pipe 8 mainly to block the air flow in a local area. It does not completely block the fresh air sent by the ventilator to the fully-mechanized heading face through the ventilation pipe 8. The air curtain forms an air wall to play a certain role in blocking dust and the like, but the fresh air can still flow normally under the ventilation power. In actual application, the air curtain parameters will be adjusted according to the on-site situation to ensure the ventilation effect.

[0046] The air curtain, also called an air curtain machine, is a commercially available product well-known in the art. In this embodiment, the air curtain includes an air pump and a plurality of nozzles. All the nozzles are installed on the ventilation pipe. All the nozzles are located at the same cross-section of the ventilation pipe and are evenly distributed along the circumferential direction of the ventilation pipe. The air inlet of each nozzle is communicated with the air outlet of the air pump, and the air outlet of the nozzle is located inside the ventilation pipe.

[0047] In an alternative embodiment of the present embodiment, preferably, the connection port of the dust suction pipe 2 and the agglomeration chamber 3 is the first connection port, and the connection port of the wet dust removal fan 5 and the agglomeration chamber 3 is the second connection port. The first connection port is located at one end of the agglomeration chamber 3, and the second connection port is located at the other end of the agglomeration chamber 3;

[0048] The acoustic wave generator 9 is close to the second communication port. The atomized dust suppression chemical reagent sprayed by the first spraying device 10 is located between the acoustic wave generator 9 and the first communication port, and the acoustic wave generated by the acoustic wave generator 9 is directed towards the first communication port. The flow direction of the dust-containing air in the agglomeration chamber 3 is from the first communication port to the second communication port, that is, the propagation direction of the acoustic wave generated by the acoustic wave generator 9 is opposite to the flow direction of the dust-containing air in the agglomeration chamber 3. In this way, the acoustic wave can fully contact the dust particles in the air, causing the dust particles to vibrate sufficiently, further increasing the collision probability between the dust particles, and thus promoting the agglomeration of the dust particles. The acoustic wave generator 9 is a commercially available product well-known to those skilled in the art, and its structure and working principle will not be elaborated in this embodiment.

[0049] In an alternative embodiment of the present embodiment, preferably, a vacuum sound insulation layer 6 is provided on all the chamber walls of the agglomeration chamber 3. The vacuum sound insulation layer 6 can not only prevent the environmental noise from affecting the dust suppression effect in the agglomeration chamber 3, but also prevent the acoustic wave generated in the agglomeration chamber 3 from propagating outside the agglomeration chamber 3, isolating the acoustic wave and preventing noise pollution to the tunneling working face environment.

[0050] In an alternative embodiment of the present embodiment, preferably, it further includes a track 7, the track 7 is connected to the frame of the conveyor belt in the coal mine, and rollers are respectively provided at the bottoms of the wet dust removal fan 5, the agglomeration chamber 3 and the storage tank 4, and the rollers are in rolling cooperation with the track 7.

[0051] In an alternative embodiment of the present embodiment, preferably, three specific ratios of the dust suppression chemical reagent are provided:

[0052] ① The dust suppression chemical reagent includes water and xanthan gum, and the concentration ratio of xanthan gum in the dust suppression chemical reagent is 0.05%.

[0053] ② The dust suppression chemical reagent includes water, sodium dodecyl sulfate and xanthan gum. The concentration ratio of sodium dodecyl sulfate in the dust suppression chemical reagent is 0.05%, and the concentration ratio of xanthan gum in the dust suppression chemical reagent is 0.05%.

[0054] ③ The dust suppression chemical reagent includes water, sodium dodecylbenzenesulfonate and xanthan gum. The concentration ratio of sodium dodecylbenzenesulfonate in the dust suppression chemical reagent is 0.03%, and the concentration ratio of xanthan gum in the dust suppression chemical reagent is 0.05%.

[0055] The specific working principle of the dust removal system for the fully mechanized coal tunneling face in this embodiment is as follows:

[0056] After the wet dust removal fan 5 is started, a negative pressure is generated in the agglomeration chamber 3. The dusty air at the fully-mechanized heading face is sucked into the agglomeration chamber 3 through the dust suction pipe 2. In the agglomeration chamber 3, sound waves are generated by the sound wave generator 9. When the sound waves encounter the dust particles in the dusty air, the dust particles will vibrate. Under the action of the sound field, the motion state of the dust particles changes, and the particulate matter agglomerates under its entrainment effect. At the same time, the spraying unit also starts to work. The first spraying device 10 atomizes the dust-removing chemical reagent in the storage tank 4 into tiny droplets and sprays them into the agglomeration chamber 3. Under the action of the tiny droplets, the particulate matter in the dusty air further agglomerates, making the concentration of the particulate matter in the dusty air decrease more significantly. Then the dusty air is sucked into the wet dust removal fan 5 for dust removal;

[0057] As the roadheader 1 works, the fully-mechanized heading face is continuously advanced. After the fully-mechanized heading face is advanced, the length of the ventilation pipe 8 can be extended as needed to prevent fresh air from not being able to be introduced into the fully-mechanized heading face due to the insufficient length of the ventilation pipe 8. As the fully-mechanized heading face is advanced, the bottom ends of the wet dust removal fan 5, the agglomeration chamber 3, and the storage tank 4 can also be slid along the track 7, that is, the entire dust removal system (except the ventilation unit) is moved along the track 7 to adapt to the advancement of the fully-mechanized heading face.

[0058] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A dust removal system for a comprehensive tunneling face in a coal mine, characterized in that, Comprising: A reunion chamber, the reunion chamber being airtight; A dust suction pipe, one end of the dust suction pipe being communicated with the reunion chamber and the other end being used for being arranged in the dusty air at the fully-mechanized heading face; A wet dust removal fan, the suction port of the wet dust removal fan being communicated with the reunion chamber; An acoustic wave generator, the acoustic wave generator being arranged in the reunion chamber and being used for generating acoustic waves; A spray unit, the spray unit including a storage tank and a first spray device arranged in the reunion chamber, the storage tank being used for storing a dust suppression chemical reagent, the first spray device being communicated with the storage tank, and the first spray device being used for atomizing the dust suppression chemical reagent and spraying the atomized dust suppression chemical reagent in the reunion chamber.

2. The dust removal system for the fully-mechanized heading face of a coal mine according to claim 1, wherein: Further comprising a ventilation unit, the ventilation unit including a ventilator and a ventilation pipe with one end being communicated with the air outlet of the ventilator, the ventilator being used for pumping fresh air into the fully-mechanized heading face through the ventilation pipe.

3. The dust removal system for fully mechanized heading face in coal mine according to claim 2, wherein: An air curtain is installed at one end of the ventilation pipe close to the fully-mechanized heading face, and the air curtain is used for preventing the dusty air at the fully-mechanized heading face from entering the ventilation pipe.

4. The dust removal system for fully mechanized heading face in coal mine according to claim 3, wherein: The air curtain includes an air pump and a plurality of nozzles, all the nozzles being installed on the ventilation pipe, all the nozzles being located at the same cross-section of the ventilation pipe and being uniformly distributed along the circumferential direction of the ventilation pipe, the air inlet of each nozzle being communicated with the air outlet of the air pump, and the air outlet of the nozzle being located inside the ventilation pipe.

5. The dust removal system for fully-mechanized heading face in coal mine according to claim 1, wherein: The connection port of the dust suction pipe and the reunion chamber is a first connection port, the connection port of the wet dust removal fan and the reunion chamber is a second connection port, the first connection port is located at one end of the reunion chamber, and the second connection port is located at the other end of the reunion chamber; The acoustic wave generator is close to the second connection port, the atomized dust suppression chemical reagent sprayed by the first spray device is located between the acoustic wave generator and the first connection port, and the acoustic waves generated by the acoustic wave generator are directed towards the first connection port.

6. The dust removal system for fully-mechanized heading face in coal mine according to claim 1, characterized in that: Vacuum sound insulation layers are arranged on all the chamber walls of the reunion chamber.

7. The dust removal system for the fully-mechanized heading face in a coal mine according to claim 1, wherein: Further comprising a track, the track being connected with the frame of the conveyor belt in the coal mine, and rollers being respectively arranged at the bottoms of the wet dust removal fan, the reunion chamber and the storage tank, the rollers being in rolling cooperation with the track.

8. The dust removal system for fully-mechanized heading face in coal mine according to claim 1, wherein: The dust suppression chemical reagent includes water and xanthan gum, and the concentration ratio of xanthan gum in the dust suppression chemical reagent is 0.05%.

9. The dust removal system for fully mechanized heading face in coal mine according to claim 1, characterized in that: The dust suppression chemical reagent includes water, sodium dodecyl sulfate and xanthan gum, the concentration ratio of sodium dodecyl sulfate in the dust suppression chemical reagent is 0.05%, and the concentration ratio of xanthan gum in the dust suppression chemical reagent is 0.05%.

10. The dust removal system for the fully-mechanized heading face of a coal mine according to claim 1, wherein: The dust suppression chemical reagent includes water, sodium dodecylbenzenesulfonate and xanthan gum, the concentration ratio of sodium dodecylbenzenesulfonate in the dust suppression chemical reagent is 0.03%, and the concentration ratio of xanthan gum in the dust suppression chemical reagent is 0.05%.

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