Coal mine heading face air curtain system

Abstract

The invention discloses a coal mine tunneling face air curtain system which comprises an air curtain generating device, an air inlet barrel and a circulating water wet type dust removal device, the air curtain generating device is used for being arranged in a tunneling roadway and generating an air curtain, and the circulating water wet type dust removal device is used for being arranged in the tunneling roadway and generating a dust curtain. The circulating water wet type dust removal device is provided with an air suction opening and an air exhaust opening, the air suction opening extracts dust-containing air generated when the tunneling face is cut and purifies the dust-containing air into clean air, and the air exhaust opening is communicated with the air curtain generation device so that the clean air can be conveyed to the air curtain generation device. The problem of air distribution caused by the fact that an air curtain is manufactured at an opening of a press-in section is solved, normal proceeding of tunneling operation is guaranteed through stable and sufficient air supply amount, the working efficiency cannot be affected by insufficient air amount, and equipment such as a coal mining machine can operate more efficiently. In addition, the problem that dust-containing water vapor generated in the circulating water wet dust removal process pollutes the working environment in the tunneling face is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine dust removal, and in particular to an air curtain system for a coal mine heading face. Background Art

[0002] With the continuous development of mineral resource development and underground engineering construction in my country, environmental protection issues at tunneling faces are becoming increasingly prominent. While traditional circulating water wet dust removal systems address the issue of significant water waste, in practice, dust-laden water vapor, when combined with air and discharged, can have a certain impact on the working environment at the tunneling face, making it even more severe. Furthermore, the current construction of tunneling face air curtains, which connect an air curtain generator to the opening in the entry section to achieve the dust-blocking effect of the air curtain, results in a reduction in the air supply entering the tunneling face due to the air distribution effect, thus impacting the working environment and work efficiency. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a coal mine heading face air curtain system.

[0005] The coal mine heading face air curtain system of the embodiment of the present invention includes an air curtain generating device, an air inlet tube, and a circulating water wet dust removal device. The air curtain generating device is used to be arranged in the heading tunnel and generate an air curtain to isolate the dust generated when the coal mining machine cuts the heading face;

[0006] At least a portion of the air inlet duct is disposed in the tunneling tunnel, an air inlet of the air inlet duct is used to communicate with clean air, and an air outlet of the air inlet duct is used to be disposed between the air curtain and the tunneling face to spray clean air toward the tunneling face;

[0007] The circulating water wet dust removal device is used to be installed in the excavation tunnel. The circulating water wet dust removal device has an air suction port and an air exhaust port. The air suction port is arranged between the wind curtain and the excavation face to extract the dust-containing air generated when cutting the excavation face and purify the dust-containing air into clean air. The air exhaust port is connected to the wind curtain generating device to transport the clean air to the wind curtain generating device.

[0008] In some embodiments, the circulating water wet dust removal device includes a wet dust removal device and an air-water separation device. The air suction port is provided on the wet dust removal device. The wet dust removal device is used to spray water mist toward the dust-laden air entering the air suction port to remove dust in the air. The wet dust removal device is connected to the air-water separation device to transport the mixture of dust-laden water vapor and air generated in the wet dust removal device to the air-water separation device. The air-water separation device is used to separate water vapor in the air to form clean air. The air-water separation device is connected to the exhaust port to transport clean air to the exhaust port.

[0009] In some embodiments, the circulating water wet dust removal device further includes a power device, which is connected to the air-water separation device and is used to generate extraction power for extracting dust-laden air, and the exhaust port is provided on the power device.

[0010] In some embodiments, the power device is an exhaust fan.

[0011] In some embodiments, the circulating water wet dust removal device also includes a water circulation device, which is connected to the wet dust removal device and is used to receive sewage generated by the wet dust removal device during dust removal, and purify the sewage into clean water and transport it to the wet dust removal device to form a spray.

[0012] In some embodiments, the gas-water separation device is connected to the water circulation device and is used to transport wastewater generated when separating water vapor in the air to the water circulation device, so that the water circulation device purifies the wastewater generated by the gas-water separation device.

[0013] In some embodiments, the coal mine heading face air curtain system of the embodiment of the present invention further includes a pressure-in fan, which is arranged at the inlet end of the air inlet duct and delivers clean air into the air inlet duct.

[0014] In some embodiments, the air inlet tube includes a bent section, and the bent section is provided with a guide plate.

[0015] In some embodiments, the guide plate has a first arcuate surface and a second arcuate surface opposite to each other, the first arcuate surface is convex toward the outer side of the bending section, and the second arcuate surface is concave toward the outer side of the bending section.

[0016] In some embodiments, the curvature of the first curved surface is smaller than the curvature of the second curved surface.

[0017] Compared with the traditional air curtain structure, the coal mine excavation face air curtain system of the embodiment of the present invention avoids the air distribution problem caused by manufacturing the air curtain at the opening of the pressing section. The stable and sufficient air supply ensures the normal progress of the excavation operation, and will not affect the work efficiency due to insufficient air volume, so that coal mining machines and other equipment can operate more efficiently.

[0018] Furthermore, the present invention utilizes a circulating water wet dust removal device to achieve water resource recycling while also separating the dust-laden water vapor generated during the process from the air, thus preventing the dust-laden water vapor from polluting the working environment within the tunneling face. The purified air, after the water vapor has been removed, is transported to the air curtain generating device, achieving the recycling of the clean air. This not only improves air utilization, reduces dependence on external fresh air, but also reduces energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top view schematic diagram of the coal mine heading face air curtain system according to an embodiment of the present invention.

[0020] Figure 2 It is a side view schematic diagram of the coal mine heading face air curtain system according to an embodiment of the present invention.

[0021] Figure 3 It is a schematic structural diagram of a circulating water wet dust removal device according to an embodiment of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the air inlet duct according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] 100. Excavation tunnel; 200. Excavation face; 1. Air curtain generating device; 2. Air curtain; 3. Air inlet duct; 301. Bending section; 4. Circulating water wet dust removal device; 401. Air suction port; 402. Air exhaust port; 403. Wet dust removal device; 404. Air-water separation device; 405. Power unit; 406. Water circulation device; 5. Push-in fan; 6. Guide vane; 601. First curved surface; 602. Second curved surface. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0026] like Figures 1 to 4As shown, the coal mine heading face air curtain system according to an embodiment of the present invention includes an air curtain generating device 1, an air inlet duct 3, and a circulating water wet dust removal device 4. The air curtain generating device 1 is used to be installed in the heading tunnel 100 and generate an air curtain 2 to isolate the dust generated when the coal mining machine cuts the heading face 200.

[0027] At least a portion of the air inlet duct 3 is arranged in the excavation tunnel 100, the air inlet of the air inlet duct 3 is used to communicate with the clean air, and the air outlet of the air inlet duct 3 is used to be arranged between the air curtain 2 and the excavation face 200 to spray clean air toward the excavation face 200.

[0028] Circulating water wet dust removal device 4 is intended to be installed within tunneling tunnel 100. It includes an air intake 401 and an air exhaust 402. Air intake 401 is located between air curtain 2 and tunneling face 200 to extract dust-laden air generated during cutting of tunneling face 200 and purify the dust-laden air into clean air. Air exhaust 402 is connected to air curtain generator 1 to deliver the clean air to it.

[0029] When the coal mine heading face air curtain system of the present invention is in use, an air curtain generating device 1 is installed in the heading tunnel 100. When the system is activated, the air curtain generating device 1 begins to operate and generates an air curtain 2. This air curtain 2 acts as an isolation device. When the shearer cuts the heading face 200 and generates dust, the air curtain 2 prevents the dust from spreading to other areas of the working environment, confining the dust to a certain area.

[0030] The air inlet of the air inlet 3 is connected to the clean air, which is introduced through the air inlet 3. The air outlet of the air inlet 3 is located between the air curtain 2 and the tunneling face 200. Clean air is ejected from the air outlet toward the tunneling face 200. This not only provides fresh air to the tunneling face 200, ensuring the breathing needs of workers, but also blows the dust-laden air generated during cutting toward the air intake 401 of the circulating water wet dust removal device 4.

[0031] The air intake 401 of the circulating water wet dust removal device 4 is also located between the air curtain 2 and the tunneling face 200. It extracts dust-laden air generated during the cutting of the tunneling face 200. Within the device, the dust-laden air is purified into clean air. The purified clean air is then transported to the air curtain generating device 1 through the air outlet 402, where it is re-entered into the formation of the air curtain 2, achieving air recycling.

[0032] Compared with the traditional air curtain structure, the coal mine excavation face air curtain system of the embodiment of the present invention avoids the air distribution problem caused by manufacturing the air curtain 2 at the opening of the pressing section. The stable and sufficient air supply ensures the normal progress of the excavation operation, and will not affect the work efficiency due to insufficient air volume, so that coal mining machines and other equipment can operate more efficiently.

[0033] Furthermore, the present invention utilizes a circulating water wet dust removal device 4 to achieve water resource recycling while also separating the dust-laden water vapor generated during the process from the air, thereby preventing the dust-laden water vapor generated during the process from polluting the working environment within the tunneling face 200. The clean air, after the water vapor has been removed and purified, is conveyed to the air curtain generating device 1, achieving the recycling of the clean air. This not only improves air utilization, reduces dependence on external fresh air, but also reduces energy consumption.

[0034] In some embodiments, the circulating water wet dust removal device 4 includes a wet dust removal device 403 and an air-water separation device 404. An air intake 401 is provided on the wet dust removal device 403. The wet dust removal device 403 is configured to spray water mist toward the dust-laden air entering the air intake 401 to remove dust from the air. The wet dust removal device 403 is connected to the air-water separation device 404 to transport the mixture of dust-laden water vapor and air generated within the wet dust removal device 403 to the air-water separation device 404. The air-water separation device 404 is configured to separate water vapor from the air to form clean air. The air-water separation device 404 is connected to the exhaust port 402 to transport clean air to the exhaust port 402.

[0035] After dust-laden air enters wet dust removal device 403 from air intake 401, wet dust removal device 403 sprays water mist toward the dust-laden air. When the dust-laden air and the water mist fully come into contact, dust particles adhere to the water mist particles and are separated from the air as the water mist settles, thereby removing dust from the air.

[0036] After being processed by the wet dust removal device 403, a mixture of dust-laden water vapor and air is produced. This mixture is then transported to the air-water separation device 404. The air-water separation device 404 uses specific separation technologies, such as centrifugal separation and filtration separation, to separate the water vapor from the air. The separated water vapor can be collected and recycled, and the clean air formed after separation is transported to the exhaust port 402 through a connecting structure with the exhaust port 402. The exhaust port 402 then transports the clean air to the air curtain generating device 1, where it participates in the formation of the air curtain 2.

[0037] Wet dust removal device 403 removes dust by spraying water mist, effectively capturing and removing dust from the air. This method is effective for removing dust of all sizes, especially fine dust particles, as the water mist increases the chances of collision and agglomeration, thereby increasing dust removal efficiency and further improving the air quality of the work environment.

[0038] The installation of the air-water separator 404 prevents the adverse effects of dust-laden water vapor being released into the tunneling face, potentially affecting the working environment. Without this separation mechanism, the release of dust-laden water vapor into the working environment could cause humidity and reduce visibility, impairing workers' vision and the normal operation of equipment. The separated water vapor can be recycled, reducing water waste.

[0039] Clean air is delivered to the air curtain generator 1, preventing moisture from damaging it and other related equipment. Moisture can cause rust and corrosion, impacting equipment life and performance. The clean air delivered after air and water separation ensures stable equipment operation, reducing maintenance costs and failure rates.

[0040] The clean air obtained through air-water separation is of higher quality. During the air circulation process, it can better meet the operating requirements of the air curtain generating device 1, forming a more stable and effective air curtain 2. This helps to further improve the dust isolation effect of the air curtain 2 and strengthen its dust isolation function, thereby improving the performance and efficiency of the entire air curtain 2 system.

[0041] In some embodiments, the circulating water wet dust removal device 4 further includes a power device 405 , which is connected to the air-water separation device 404 and is used to generate extraction power for extracting dust-laden air. The exhaust port 402 is provided on the power device 405 .

[0042] Power unit 405 is connected to air-water separator 404. When activated, it generates extraction power. This extraction power is transmitted through air-water separator 404 to air intake 401 of wet dust removal device 403, enabling air intake 401 to generate a strong suction force, thereby smoothly extracting the dust-laden air generated when cutting the tunnel face 200 into the circulating water wet dust removal device 4.

[0043] After dust-laden air enters wet dust removal unit 403, it is sprayed with water mist to remove dust, resulting in a mixture of dust-laden water vapor and air. This mixture is then transported to air-water separation unit 404 for air-water separation, resulting in clean air. Power unit 405 extracts the dust-laden air while also providing the power to transport the clean air. Since exhaust port 402 is located on power unit 405, it transports the clean air separated from air-water separation unit 404 through exhaust port 402 to air curtain generator 1.

[0044] The powerful extraction power provided by power unit 405 ensures that dust-laden air is quickly and efficiently drawn into circulating water wet dust removal device 4. This allows dust generated by tunneling face 200 to be promptly collected and processed, preventing dust from lingering and spreading in the working environment for extended periods of time. This significantly improves dust removal efficiency and further enhances the air quality of the working environment.

[0045] In some embodiments, the power device 405 is an exhaust fan.

[0046] The exhaust fan 405, serving as the power unit, rotates at high speed upon startup, creating a negative pressure zone within the fan. Because the fan is connected to the air-water separator 404, this negative pressure is transmitted through the separator 404 to the air intake 401 of the wet dust removal device 403. Under this negative pressure, the dust-laden air generated by cutting the tunnel face 200 is forcefully drawn through the air intake 401 into the wet dust removal device 403, initiating the entire air purification process.

[0047] The exhaust fan has a powerful suction capacity, quickly and efficiently extracting large amounts of dust-laden air generated by the tunneling face 200 into the circulating water wet dust removal device 4. Compared to some other types of power devices 405, the exhaust fan can quickly create a greater negative pressure, improving the extraction efficiency of dust-laden air, thereby more promptly controlling the spread of dust and effectively improving the air quality of the working environment.

[0048] The exhaust fan provides stable power, ensuring the stable operation of the entire air circulation system. It continuously extracts dust-laden air and delivers clean air, creating a stable air flow path within the system. This stability helps maintain the stability and effectiveness of Air Curtain 2, enhancing its ability to isolate dust particles.

[0049] In some embodiments, the circulating water wet dust removal device 4 also includes a water circulation device 406, which is connected to the wet dust removal device 403 and is used to receive the sewage generated by the wet dust removal device 403 during dust removal, and purify the sewage into clean water and transport it to the wet dust removal device 403 to form a spray.

[0050] When the wet dust removal device 403 sprays water mist toward the dust-laden air to remove dust, it produces wastewater containing a large amount of dust and other impurities. The water circulation device 406 is connected to the wet dust removal device 403 and can collect this wastewater in a timely manner to prevent the wastewater from accumulating in the wet dust removal device 403 and affecting its normal operation.

[0051] After the collected sewage enters the water circulation device 406, the water circulation device 406 will perform a series of purification processes on the sewage. The steps may include sedimentation, filtration, adsorption, etc., to remove dust, impurities, heavy metals and other harmful substances in the sewage, and gradually purify the sewage into clean water.

[0052] The purified clean water is then transported back to the wet dust removal device 403. In the wet dust removal device 403, the clean water is transformed into a fine mist through a specific spray system and sprayed toward the dust-laden air again to continue the dust removal operation, thus achieving water recycling.

[0053] In mineral resource development and underground engineering construction, water resources are often precious and expensive to obtain. Water recycling device 406 enables water recycling, significantly reducing reliance on external fresh water resources. By continuously purifying and reusing wastewater, water consumption is reduced, meeting the requirements of sustainable development and providing significant economic and environmental benefits.

[0054] Reducing water usage also reduces the cost of purchasing and transporting fresh water. Furthermore, water recycling device 406 purifies wastewater, avoiding the environmental protection costs that would otherwise be incurred by direct wastewater discharge. Furthermore, recycled water can, to a certain extent, maintain the stable operation of wet dust removal device 403, reducing equipment failures and maintenance costs caused by water quality issues.

[0055] The quality and performance of the spray generated by purified clean water are more guaranteed. Compared to spray generated by untreated sewage, the clean water spray can more effectively capture and remove dust from the air, increasing the dust removal efficiency of the wet dust removal device 403 and further improving the working environment at the tunneling face 200.

[0056] In some embodiments, the gas-water separation device 404 is connected to the water circulation device 406 for conveying wastewater generated when separating water vapor from the air to the water circulation device 406 so that the water circulation device 406 can purify the wastewater generated by the gas-water separation device 404 .

[0057] When separating the dust-laden water vapor from the air mixture, the air-water separator 404 also separates impurities such as dust from the water vapor, thereby generating wastewater. This wastewater contains a certain amount of dust and other pollutants and requires treatment. The air-water separator 404 is connected to the water circulation device 406. Through this connection structure, the wastewater generated by the air-water separator 404 is transported to the water circulation device 406. After receiving the wastewater from the air-water separator 404, the water circulation device 406 purifies it. The purification process may include steps such as precipitation, filtration, and adsorption to remove impurities from the wastewater and convert it into clean water. This clean water is then transported back to the wet dust removal device 403 to form a spray to continue participating in the dust removal operation, completing the entire water cycle.

[0058] The wastewater generated by the gas-water separator 404 is also processed and recycled by the water circulation unit 406, further improving water resource utilization efficiency. This effectively treats and reuses wastewater that would otherwise be wasted, reducing the need for fresh water and alleviating water shortages to a certain extent.

[0059] If the wastewater generated by the gas-water separation device 404 is discharged directly, it may pollute the surrounding environment, especially in relatively closed environments such as underground projects, where it may affect soil and groundwater quality. By transporting the wastewater to the water circulation device 406 for purification, the environmental risks associated with direct wastewater discharge are avoided, thus protecting the ecological environment.

[0060] In some embodiments, the coal mine heading face air curtain system of the embodiment of the present invention further includes a pressure-in fan 5 , which is disposed at the inlet end of the air inlet duct 3 to deliver clean air into the air inlet duct 3 .

[0061] The forced-in blower 5 is installed at the inlet end of the air inlet duct 3. When the blower is started, its impeller rotates at high speed, creating a negative pressure at the blower inlet. This negative pressure causes clean air from the outside to be sucked into the blower. The blower then uses its own power to press the clean air into the air inlet duct 3 at a certain pressure and flow rate.

[0062] Clean air entering the air inlet duct 3 flows along the air inlet duct 3 and is ultimately ejected toward the tunneling face 200 from the air outlet of the air inlet duct 3, located between the air curtain 2 and the tunneling face 200. This clean air not only provides sufficient fresh air for the tunneling face 200, meeting the breathing needs of workers, but also blows the dust-laden air generated by the shearer cutting the tunneling face 200 toward the air intake 401 of the circulating water wet dust removal device 4, thereby facilitating the collection and treatment of the dust-laden air.

[0063] The forced-in blower 5 provides powerful power, significantly enhancing the air intake capacity of the air inlet duct 3. Compared to relying solely on natural ventilation or weaker power to deliver air, it can deliver a large amount of clean air to the tunneling face 200 in a short period of time, ensuring an adequate supply of fresh air in the working area and effectively improving the air quality and ventilation conditions at the tunneling face 200.

[0064] By forcing in large quantities of clean air and injecting it in a targeted manner, dust dispersion can be better controlled. This injection of clean air creates an airflow that rapidly blows the dust-laden air toward the air intake 401 of the circulating water wet dust removal device 4, enabling the timely collection and disposal of dust. This reduces the dust's residence time and diffusion range in the work environment, further enhancing the air curtain 2 system's dust isolation and control effectiveness.

[0065] In some embodiments, the air inlet tube 3 includes a bent section 301 , and the bent section 301 is provided with a guide plate 6 .

[0066] like Figure 4As shown, when the clean air flows through the air inlet 3 to the bend 301, the airflow's original linear motion is disrupted due to the change in air duct direction. Without the guide vane 6, the airflow would form turbulent vortices at the bend, resulting in energy loss and increased flow resistance.

[0067] The guide vanes 6 provided at the bend 301 guide the airflow. Arranged in a specific shape and angle, the guide vanes 6 allow the airflow to change direction relatively smoothly along the direction of the guide vanes 6. They smooth out turbulent airflow, allowing it to transition smoothly through the bend, reducing collisions and energy loss, and ensuring continuous and stable forward flow.

[0068] In some embodiments, the guide plate 6 has a first curved surface 601 and a second curved surface 602 opposite to each other. The first curved surface 601 is convex toward the outside of the bending section 301 , and the second curved surface 602 is concave toward the outside of the bending section 301 .

[0069] When the clean air flows through the bent section 301 of the air inlet duct 3, the bent section 301 changes the flow direction of the airflow, and the airflow is affected by centrifugal force. The pressure is higher on the outside of the bent section 301 and lower on the inside, which easily forms an uneven airflow distribution and a large vortex.

[0070] The first curved surface 601 is convex toward the outside of the bend section 301, while the second curved surface 602 is concave toward the outside of the bend section 301. This design ensures that when the airflow contacts the guide vane 6, according to Bernoulli's principle, the airflow has a relatively slow flow rate and a higher pressure on the first curved surface 601 (convex side), while the airflow has a relatively fast flow rate and a lower pressure on the second curved surface 602 (concave side).

[0071] Based on this pressure difference, guide vane 6 can guide the airflow to change direction more smoothly, distributing it rationally from the outside to the inside of the bend 301. This reduces airflow accumulation on the outside and vortices formed in the low-pressure area inside. It also makes the airflow more evenly distributed across the cross-section of the bend 301, avoiding energy loss and turbulence caused by sudden changes in the airflow. This allows clean air to continue flowing in the air inlet duct 3 in a relatively stable and orderly manner, ultimately being evenly ejected from the air outlet onto the tunneling face 200.

[0072] In some embodiments, the curvature of the first curved surface 601 is smaller than the curvature of the second curved surface 602 .

[0073] Because first curved surface 601 has a small curvature and a relatively flat surface, airflow avoids drastic changes in velocity when it contacts it, allowing it to flow relatively smoothly along first curved surface 601, avoiding significant shock and energy loss caused by sudden changes in direction. Furthermore, it provides a preliminary degree of guidance for the airflow.

[0074] The second curved surface 602 has a larger curvature and a deeper concave portion. This allows the airflow, after initially being guided by the first curved surface 601, to change direction within a larger curvature range when entering the second curved surface 602. According to the principles of fluid mechanics, a larger curvature can provide a more appropriate centripetal force, allowing the airflow to complete a more gentle turn in a smaller space, further reducing the generation of eddies. Furthermore, the second curved surface 602 can better guide the airflow from the outside to the inside of the bend section 301, making the airflow more evenly distributed across the cross-section of the entire bend section 301, ensuring a stable transition of the airflow in the bend section 301 and subsequent smooth flow.

[0075] This unique curved design allows for more efficient and smoother airflow diversion at the bend 301. Compared to conventional guide vanes 6 or the absence of guide vanes 6, it minimizes energy loss caused by airflow turbulence and vortex formation. This means that the push-in fan 5 does not need to expend excessive energy to overcome airflow resistance at the bend when delivering clean air, effectively reducing energy consumption across the entire air curtain 2 system and saving operating costs.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0078] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0079] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0080] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0081] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A coal mine heading face air curtain system, characterized in that: include: An air curtain generating device is provided in the tunneling tunnel and generates an air curtain to isolate dust generated when the coal mining machine cuts the tunneling face; an air inlet duct, at least a portion of which is disposed in the tunneling tunnel, an air inlet of the air inlet duct being in communication with clean air, and an air outlet of the air inlet duct being disposed between the air curtain and the tunneling face to eject clean air toward the tunneling face; A circulating water wet dust removal device is used to be installed in the excavation tunnel. The circulating water wet dust removal device has an air suction port and an air exhaust port. The air suction port is arranged between the wind curtain and the excavation face to extract the dust-laden air generated when cutting the excavation face and purify the dust-laden air into clean air. The air exhaust port is connected to the wind curtain generating device to transport the clean air to the wind curtain generating device.

2. The coal mine heading face air curtain system according to claim 1, characterized in that: The circulating water wet dust removal device includes a wet dust removal device and an air-water separation device. The air suction port is provided on the wet dust removal device. The wet dust removal device is used to spray water mist toward the dust-laden air entering the air suction port to remove dust in the air. The wet dust removal device is connected to the air-water separation device to transport the mixture of dust-laden water vapor and air generated in the wet dust removal device to the air-water separation device. The air-water separation device is used to separate water vapor in the air to form clean air. The air-water separation device is connected to the exhaust port to transport clean air to the exhaust port.

3. The coal mine heading face air curtain system according to claim 2, characterized in that: The circulating water wet dust removal device also includes a power device, which is connected to the air-water separation device and is used to generate extraction power for extracting dust-laden air. The exhaust port is provided on the power device.

4. The coal mine heading face air curtain system according to claim 3, characterized in that: The power device is an exhaust fan.

5. The coal mine heading face air curtain system according to claim 2, characterized in that: The circulating water wet dust removal device also includes a water circulation device, which is connected to the wet dust removal device and is used to receive sewage generated by the wet dust removal device during dust removal, and purify the sewage into clean water and transport it to the wet dust removal device to form a spray.

6. The coal mine heading face air curtain system according to claim 5, characterized in that: The gas-water separation device is communicated with the water circulation device and is used to transport sewage generated when separating water vapor in the air to the water circulation device, so that the water circulation device purifies the sewage generated by the gas-water separation device.

7. The coal mine heading face air curtain system according to claim 1, characterized in that: It also includes a forced-in fan, which is arranged at the inlet end of the air inlet duct and transports clean air into the air inlet duct.

8. The coal mine heading face air curtain system according to claim 7, characterized in that: The air inlet tube includes a bending section, and the bending section is provided with a guide plate.

9. The coal mine heading face air curtain system according to claim 8, characterized in that: The guide plate has a first arcuate surface and a second arcuate surface opposite to each other. The first arcuate surface is convex toward the outer side of the bending section, and the second arcuate surface is concave toward the outer side of the bending section.

10. The coal mine heading face air curtain system according to claim 9, characterized in that: The curvature of the first curved surface is smaller than that of the second curved surface.

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