Method and device for wet dust fall in mining tunneling process

Abstract

The invention provides a wet-type dust falling method and device in a mining tunneling process, and the method comprises the steps: spraying high-speed dust-containing airflow in a wet-type spraying dust falling unit through a spraying system, enabling fog drops sprayed by the spraying system to be combined with the high-speed dust-containing airflow to form high-speed fog-dust mixed airflow, the wet-type spraying and dust-settling unit comprises a silk screen structure; dust-containing fog drops of the high-speed fog-dust mixed airflow are filtered through a silk screen structure, the filtered airflow is discharged to a roadway space, and under the adsorption effect of the silk screen structure, the dust-containing fog drops form slurry on the surface of the silk screen structure; in addition, the slurry falls into the slurry collecting tank under the gravity effect. The problems that an existing flat plate type silk screen structure is low in filtering capacity, inconvenient to install and maintain, high in cost and the like can be solved.

Description

[0001] Priority Statement

[0002] This application claims the priority of a Chinese patent application with the application number 202410794877.6, titled "A Wet Dust Reduction Device and Method during Mine Tunneling Process", filed on June 19, 2024, and incorporates it herein by reference. Technical Field

[0003] The present invention relates to the technical field of mine tunneling dust reduction, and more specifically, to a wet dust reduction method and device during mine tunneling process. Background Art

[0004] The main dust generation points during mine tunneling are located at the excavation face, and the dust generation amount accounts for more than 85% of the whole mine, which is the key and difficult point of dust control. Among them, in the limited enclosed space during tunneling, a high-speed dust-laden air flow of 400 - 1000 mg / m 3 is generated per unit time. Currently, mainly wet dust removal devices, dry dust removal devices, water spray dust reduction, etc. are used to reduce the dust in the high-speed dust-laden air flow generated during tunneling; in these dust reduction treatment devices, the wet dust removal device reduces dust through a wet flat filter structure. This flat filter structure has the following problems:

[0005] (1) The flat filter structure cannot filter the high-speed dust-laden air flow generated per unit time in time per unit time. Among them, Figure 8 shows the ability of the flat filter structure to handle the high-speed dust-laden air flow, △P = P 入 -P 出 ; P 入 is the pressure of the dust-laden air flow before filtration, and P 出 is the pressure of the dust-laden air flow after filtration; △P represents the difference in pressure of the dust-laden air flow before and after filtration. During the filtration process, △P will change due to the resistance of the filter material and the accumulation of dust in the air flow. In Figure 8 the shown embodiment, its change trend is a slow linear decline, that is, as the filtration time increases, △P will gradually decrease. Therefore, the flat filter structure has low filtration ability and low dust removal efficiency;

[0006] (2) The flat filter structure generally uses a rectangular or square shape. This shape of the filter structure has a large volume, so it is not convenient for installation and subsequent maintenance, and the cost is high.

[0007] Therefore, to solve the above problems, it is necessary to propose a wet dust reduction method and device during mine tunneling process. Summary of the Invention

[0008] In view of the above problems, the object of the present invention is to provide a wet dust reduction method and device for the mining tunneling process, so as to solve the problems of low filtering capacity, inconvenient installation and maintenance, and high cost of the existing flat filter structure.

[0009] The present invention provides a wet dust reduction method for the mining tunneling process, including:

[0010] Spraying the high-speed dust-laden air flow in the wet spray dust reduction unit through a spraying system, so that the droplets sprayed by the spraying system are combined with the high-speed dust-laden air flow to form a high-speed mist-dust mixed air flow. Among them, the high-speed mist-dust mixed air flow includes dust-containing droplets, the spraying system includes an atomizing nozzle for spraying droplets, and the wet spray dust reduction unit includes a wire mesh structure;

[0011] Filtering the dust-containing droplets in the high-speed mist-dust mixed air flow through the wire mesh structure, and discharging the filtered air flow into the roadway space. And, under the adsorption effect of the wire mesh structure, the dust-containing droplets form a slurry on the surface of the wire mesh structure; and, the slurry falls into the slurry collecting tank under the gravity effect.

[0012] Preferably, the wire mesh structure includes a conical wire mesh arranged at the end of the housing of the wet spray dust reduction unit, and the specific surface area of the conical wire mesh is greater than 2πRL, where L is the length of the housing of the wet spray dust reduction unit, and R is the radius of the cross-section of the housing.

[0013] Preferably, the wire mesh structure includes an inclined plate type elliptical wire mesh arranged inside the housing of the wet spray dust reduction unit, where

[0014] The inclined plate type elliptical wire mesh is arranged corresponding to the atomizing nozzle, and the inclined plate type elliptical wire mesh includes at least one layer of corrosion-resistant stainless steel wire mesh.

[0015] Preferably, the conical wire mesh includes a conical skeleton and at least one layer of corrosion-resistant stainless steel wire mesh arranged inside the conical skeleton; where

[0016] The conical skeleton includes an inner lining and an outer lining, both the inner lining and the outer lining are made of thin iron wire, the inner lining and the outer lining form a conical structure, and the corrosion-resistant stainless steel wire mesh is arranged between the inner lining and the outer lining.

[0017] Preferably, it further includes: introducing the slurry in the slurry collecting tank into the slurry storage tank through a liquid dropping pipe;

[0018] Providing the slurry in the slurry storage tank to the wet spray dust reduction unit through the spraying system to remove dust from the high-speed mist-dust mixed air flow.

[0019] The present invention also provides a wet dust reduction device for the mining tunneling process, including: a spray system, a wet spray dust reduction unit, a slurry collecting tank arranged below the wet spray dust reduction unit, and a slurry storage tank communicated with the slurry collecting tank, wherein,

[0020] The spray system is used to spray droplets through atomizing nozzles towards the wet spray dust reduction unit;

[0021] The wet spray dust reduction unit includes a cylindrical shell and a wire mesh structure connected to the shell. The wire mesh structure is used to filter the dust-containing droplets in the high-speed mist-dust mixed airflow formed by the droplets and the high-speed dust-containing airflow.

[0022] Preferably, the wire mesh structure includes a conical wire mesh arranged at the end of the shell of the wet spray dust reduction unit. The specific surface area of the conical wire mesh is greater than 2πRL, where L is the length of the shell and R is the radius of the cross-section of the shell.

[0023] Preferably, the wire mesh structure includes an inclined plate-shaped elliptical wire mesh arranged inside the shell of the wet spray dust reduction unit. The inclined plate-shaped elliptical wire mesh is arranged corresponding to the atomizing nozzles; the inclined plate-shaped elliptical wire mesh includes at least one layer of corrosion-resistant stainless steel wire mesh.

[0024] Preferably, the conical wire mesh includes a conical skeleton and at least one layer of corrosion-resistant stainless steel wire mesh arranged inside the conical skeleton; wherein,

[0025] The conical skeleton includes an inner lining and an outer lining. Both the inner lining and the outer lining are made of thin iron wires. The inner lining and the outer lining form a conical structure, and the corrosion-resistant stainless steel wire mesh is arranged between the inner lining and the outer lining.

[0026] Preferably, the slurry collecting tank is communicated with the slurry storage tank through a liquid discharge pipe.

[0027] Preferably, the spray system includes atomizing nozzles arranged corresponding to the wire mesh structure, a slurry circulation pump and a makeup water pipe communicated with the slurry storage tank, a circulation pipeline communicated with the slurry circulation pump, an outer discharge pipeline arranged at the pump outlet of the slurry circulation pump, and a pump inlet filter arranged at the inlet of the slurry circulation pump, wherein,

[0028] The atomizing nozzles are arranged on the same side or both sides of the wire mesh structure. The atomizing nozzles adopt liquid atomizing nozzles or gas-liquid mixed atomizing nozzles;

[0029] The makeup water pipe is used to supplement liquid to the slurry storage tank;

[0030] A first control valve is provided at one end of the circulation pipeline and is connected to the atomizing nozzle. A second control valve is provided at the other end of the circulation pipeline and is connected to the pump outlet of the slurry circulation pump.

[0031] A third control valve is provided on the external discharge pipeline. Under the control of the third control valve, the liquid in the slurry storage tank is discharged through the external discharge pipeline.

[0032] Preferably, an adjusting assembly for adjusting the height and angle of the slurry storage tank is provided at the bottom of the slurry storage tank, wherein,

[0033] The adjusting assembly includes: a middle support column provided in the middle area at the bottom of the slurry storage tank and middle supporting lugs for strengthening the middle support column, corner support columns respectively provided at the corner positions at the bottom of the slurry storage tank and corner supporting lugs for strengthening the corner support columns, crossbeam supporting lugs provided on the bottom crossbeam of the slurry storage tank, and a driving component provided between the crossbeam supporting lugs and the middle support column; wherein,

[0034] A pin shaft is provided on the middle support column. The driving component drives the slurry storage tank to swing around the pin shaft to a preset position. Wherein, arc-shaped long holes are respectively provided on each corner support column, and the slurry storage tank is locked at the preset position of the arc-shaped long holes through bolts and nuts.

[0035] As can be seen from the above technical solutions, the wet dust removal method and device for the mining tunneling process provided by the present invention have the following beneficial effects compared with the prior art:

[0036] (1) In the present invention, the mist droplets ejected by the spraying system are combined with the high-speed dust-containing air flow to form a high-speed mist-dust mixed air flow. The dust-containing mist droplets in the high-speed mist-dust mixed air flow are filtered through the wire mesh structure, and under the adsorption effect of the wire mesh, the dust-containing mist droplets form slurry on the surface of the wire mesh, enabling the wire mesh to play a role in dust removal.

[0037] (2) In the present invention, when the wire mesh structure adopts a conical wire mesh, the specific surface area of the conical wire mesh is greater than 2πRL, where L is the length of the shell and R is the radius of the cross-section of the shell; thereby improving the dust filtration ability and high-speed dust removal efficiency.

[0038] (3) The present invention adopts an inclined plate type elliptical wire mesh and / or a conical wire mesh. This wire mesh structure has a small volume, is easy to install and maintain, and saves costs.

[0039] (4) The present invention provides a height and angle adjustment component at the bottom of the slurry storage tank. The adjustment component can automatically and continuously adjust the front and rear height and angle of the equipment as needed to ensure rapid adaptation to the roadway terrain.

[0040] (5) By combining the wet spray dust suppression unit, the slurry storage tank with adjustable angle and height, and the spraying system, the present invention processes the dust-containing airflow generated during underground tunneling, achieving safe, efficient, and low-water-consumption dust removal and suppression effects, thus greatly improving the underground working environment and enhancing the working efficiency during coal mine tunneling.

[0041] To achieve the above and related purposes, one or more aspects of the present invention include the features described in detail later. The following description and the accompanying drawings illustrate certain exemplary aspects of the present invention in detail. However, these aspects only indicate some of the various ways in which the principles of the present invention can be used. In addition, the present invention aims to include all these aspects and their equivalents. Description of the Drawings

[0042] By referring to the following content in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easier to understand. In the drawings:

[0043] Figure 1 is the front view of the wet dust suppression device for underground tunneling according to an embodiment of the present invention;

[0044] Figure 2 is the top view of the wet dust suppression device for underground tunneling according to an embodiment of the present invention;

[0045] Figure 3 is the left view of the wet dust suppression device for underground tunneling according to an embodiment of the present invention;

[0046] Figure 4 is the cross-sectional view of the inclined plate elliptical wire mesh according to an embodiment of the present invention;

[0047] Figure 5 、 Figure 6 are respectively the cross-sectional views of the inclined plate elliptical wire mesh combined with the conical wire mesh according to an embodiment of the present invention;

[0048] Figure 7 is the connection schematic diagram of the wire mesh structure and the slurry collecting tank according to an embodiment of the present invention;

[0049] Figure 8 is the schematic diagram of the conical wire mesh structure according to an embodiment of the present invention;

[0050] Figure 9 is the schematic diagram of the process flow of the wet dust suppression method for underground tunneling according to an embodiment of the present invention;

[0051] Figure 10 Schematic diagram of the change in pressure difference for dust removal of high-speed dusty airflow by a flat wire mesh structure

[0052] Figure 11 Schematic diagram of the change in pressure difference for dust removal of high-speed dusty airflow by the wire mesh structure according to an embodiment of the present invention

[0053] The reference numerals therein include:

[0054] 6. Wet spray dust removal unit; 7. Atomizing nozzle; 8. Circulation pipeline; 9. Wire mesh structure; 91. Inclined plate type elliptical wire mesh; 911. Dust and wastewater discharge port; 92. Conical wire mesh; 921. Outer lining; 922. Inner lining; 923. Corrosion-resistant stainless steel wire mesh; 10. Housing; 11. Slurry collecting tank; 12. Make-up water pipe; 13. Second control valve; 14. Third control valve; 15. Slurry circulation pump; 16. Pump inlet filter; 17. Arc-shaped long hole; 18. Corner support column; 19. Drain pipe for the storage tank; 20. Middle support column; 21. Pin shaft hole; 22. Liquid dropping pipe; 23. Slurry storage tank; 24. Corner support ear; 25. Lower liquid collecting cone of the storage tank; 26. Liquid level gauge of the storage tank; 27. Bolt; 28. Nut; 29. First pin shaft; 30. Middle support ear; 35. Beam support ear; 36. Second pin shaft; 37. Driving component; 38. Third pin shaft

[0055] In all the drawings, the same reference numerals indicate similar or corresponding features or functions Detailed implementation manners

[0056] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is obvious that these embodiments can also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for the convenience of describing one or more embodiments

[0057] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the 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 thus should not be construed as a limitation to the present invention

[0058] In view of the problems of the existing flat screen structure mentioned above, such as low filtration capacity, inconvenient installation and maintenance, and high cost, the present invention provides a wet dust reduction method and device for the mining tunneling process.

[0059] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0060] To illustrate the wet dust reduction method for the mining tunneling process provided by the present invention, Figure 9 The flow of the wet dust reduction method for the mining tunneling process according to an embodiment of the present invention is shown.

[0061] As Figure 9 shown, the wet dust reduction method for the mining tunneling process provided by the present invention includes:

[0062] S1: Spraying the high-speed dust-laden air flow in the wet spray dust reduction unit through a spraying system, so that the droplets sprayed by the spraying system are combined with the high-speed dust-laden air flow to form a high-speed fog-dust mixed air flow. Among them, the high-speed fog-dust mixed air flow includes dust-containing droplets. The spraying system includes atomizing nozzles for spraying droplets, and the wet spray dust reduction unit includes a screen structure;

[0063] S2: Filtering the dust-containing droplets in the high-speed fog-dust mixed air flow through the screen structure, and discharging the purified air flow into the roadway space. And, under the adsorption effect of the screen structure, the dust-containing droplets form a slurry on the surface of the screen structure; and, the slurry falls into the slurry collecting tank under the gravity effect.

[0064] In the embodiment of the present invention, the droplets sprayed by the spraying system are combined with the high-speed dust-laden air flow to form a high-speed fog-dust mixed air flow. Among them, the droplets and the dust of the high-speed dust-laden air flow are naturally combined. Therefore, the high-speed fog-dust mixed air flow includes dust-containing droplets. In the invention, the dust-containing droplets in the high-speed fog-dust mixed air flow are filtered through the screen structure. The screen structure intercepts the sputtered dust-containing droplets, and under the adsorption effect of the screen structure, the dust-containing droplets form a slurry on the surface of the screen. The screen adsorption effect combines the fog and dust with the droplets and intercepts them at high speed, so that the screen plays a role in dust removal.

[0065] In the embodiment of the present invention, as Figure 5 and Figure 6As shown, the wire mesh structure includes a conical wire mesh 92 provided at the end of the housing 10 of the wet spray dust suppression unit 6. The specific surface area of the conical middle wire mesh 92 is greater than 2πRL, where L is the length of the housing of the wet spray dust suppression unit 6 and R is the radius of the cross-section of the housing, thereby improving the dust filtration ability and the high-speed dust removal efficiency. The conical wire mesh 92 includes a conical skeleton and a wire mesh provided inside the conical skeleton. The conical skeleton includes an outer lining 921 and an inner lining 922. Both the outer lining 921 and the inner lining 922 are made of thin iron wires, and the outer lining 921 and the inner lining 922 form a conical structure. The wire mesh is provided between the outer lining 921 and the inner lining 922. The wire mesh is at least a corrosion-resistant stainless steel wire mesh 923.

[0066] In Figure 5 and Figure 6 In the illustrated embodiment, the droplets ejected by the atomizing nozzle 7 are in full contact with the dust and impinge on the conical wire mesh 92, fully wetting the dust, and fine dust is trapped by the wire mesh. Moreover, the tapered effect at the tail of the conical wire mesh has two functions. The first function is the dust trapping function, and the second function is to reduce the drift of water. The conical tail can be connected to the housing 10 as needed, or the end of the conical wire mesh 92 can be connected to the housing 10. In Figure 5 In the illustrated embodiment, the end of the conical wire mesh 92 is connected to one end of the housing 10. In Figure 6 In the illustrated embodiment, the tapered portion at the tail of the conical wire mesh 92 is connected to one end of the housing 10. In specific applications, a suitable connection method can be selected according to actual requirements.

[0067] It should be noted that the wire mesh structure provided at the end of the housing 10 of the wet spray dust suppression unit 6 is a structure with a gradually decreasing radial cross-section, and such a structure is called a conical wire mesh 92. The conical wire mesh 92 filters the dust-containing droplets in the high-speed fog-dust mixed airflow. Under the action of the pressure difference steep drop effect, the sputtered dust-containing droplets are intercepted by the conical wire mesh 92, and under the adsorption effect of the wire mesh, the dust-containing droplets form a slurry on the surface of the wire mesh, enabling the wire mesh to play a role in dust removal.

[0068] In the invention, the conical wire mesh 92 is provided at the air flow outlet end (the end of the housing 10 of the wet spray dust suppression unit 6). Due to the characteristics of its wire mesh structure, the pressure difference before and after filtration can rapidly drop within a short time to form a pressure difference steep drop effect, which helps to effectively intercept and remove dust from the high-speed dust-containing airflow. In Figure 11 It can be clearly seen from the illustrated drawings that by using the dust removal method of the present invention, △P is the pressure difference of the dust-containing airflow before and after filtration, and its change trend is a steep drop. In the present invention, in the wire mesh filtration, through the pressure difference steep drop effect, the dust-containing droplets in the high-speed fog-dust mixed airflow are effectively intercepted, thereby playing a role in dust removal. Compared with Figure 10Compared with the △P trend chart, the filtering ability of the present invention is much greater than that of the existing flat plate type filtering result, so the filtering efficiency is also higher than that of the existing flat plate wire mesh structure.

[0069] To increase the dust suppression effect, as Figure 4 shown, the wire mesh structure includes an inclined plate type elliptical wire mesh 91 arranged inside the housing of the wet spray dust suppression unit 6. The inclined plate type elliptical wire mesh 91 is correspondingly arranged with the atomizing nozzle 7, and the inclined plate type elliptical wire mesh 91 adopts at least one layer of corrosion-resistant stainless steel wire mesh. The droplets sprayed by the nozzle 7 are in full contact with the dust and strike the inclined plate type elliptical wire mesh 91, fully wetting the dust, and the fine dust is captured by the wire mesh.

[0070] In the embodiment of the present invention, the wire mesh structure 9 can adopt an inclined plate type elliptical wire mesh 91, a conical wire mesh 92 or a combination of the inclined plate type elliptical wire mesh 91 and the conical wire mesh 92 as needed. In specific applications, the specific structure of the wire mesh structure 9 is set according to the actual situation.

[0071] In addition, in the present invention, atomization is carried out through the atomizing nozzle in the spraying system. Although the atomized droplets are small, they can still be effectively mixed with the dust in the high-speed air flow to form dust-containing droplets, that is, only spraying through the nozzle can also play a role in reducing dust.

[0072] In specific applications, the wire mesh in the wire mesh structure generally adopts the national standard, and the wire mesh porosity of the wire mesh is within the national standard range. A wire mesh with a suitable wire mesh porosity is selected according to the actual situation of the application scenario. The specific wire mesh porosity is not specifically limited here.

[0073] The wet dust suppression method for the mining tunneling process provided by the present invention further includes: flowing the slurry in the slurry collecting tank 11 into the slurry storage tank through the liquid dropping pipe; and supplying the slurry in the slurry storage tank to the wet spray dust suppression unit through the spraying system to remove dust from the high-speed fog-dust mixed air flow.

[0074] In the embodiment of the present invention, in order to implement the above-mentioned wet dust suppression method for the mining tunneling process, the present invention also provides a wet dust suppression device for the mining tunneling process. To illustrate the structure of the wet dust suppression device for the mining tunneling process provided by the present invention, Figures 1 to 8 the structure of the wet dust suppression device for the mining tunneling process is exemplarily marked from different angles. Specifically, Figure 1 shows the front view structure of the wet dust suppression device for the mining tunneling process according to the embodiment of the present invention; Figure 2 shows the top view structure of the wet dust suppression device for the mining tunneling process according to the embodiment of the present invention; Figure 3 shows the left view structure of the wet dust suppression device for the mining tunneling process according to the embodiment of the present invention; Figure 4Shows a cross-sectional structure of an inclined plate type elliptical wire mesh according to an embodiment of the present invention; Figure 5 , Figure 6 Respectively show a cross-sectional structure of an inclined plate type elliptical wire mesh combined with a conical wire mesh according to an embodiment of the present invention; Figure 7 Shows a cross-sectional structure of a schematic connection diagram of a wire mesh structure and a slurry collecting tank according to an embodiment of the present invention; Figure 8 Shows a conical wire mesh structure according to an embodiment of the present invention.

[0075] As Figures 1 to 8 Collectively shown, the wet dust reduction device for the mine tunneling process provided by the present invention includes: a wet spray dust reduction unit 6, a slurry collecting tank 11 disposed below the wet spray dust reduction unit 6, a slurry storage tank 23 communicated with the slurry collecting tank 11, and a spraying system. Among them, the slurry collecting tank 11 is used to collect the dust-containing slurry formed by the wet spray dust reduction unit 6, and the spraying system is used to circulate the liquid in the slurry storage tank 23 to the wet spray dust reduction unit 6; the spraying system sprays droplets towards the wet spray dust reduction unit 6 through atomizing nozzles; the wet spray dust reduction unit 6 includes a cylindrical housing 10 and a wire mesh structure 9 connected to the housing 10, and the wire mesh structure 9 is used to filter the dust-containing droplets in the high-speed dust-laden mist mixed airflow formed by the droplets and the high-speed dust-laden airflow. In an embodiment of the present invention, the slurry collecting tank 11 and the slurry storage tank 23 are communicated through a downcomer 22; through the combination of the wet spray dust reduction unit 6, the slurry storage tank 23 and the spraying system, the dust-containing airflow generated during the underground tunneling process is processed, and the effects of dust removal and dust reduction with safety, high efficiency and low water consumption can be achieved, thereby greatly improving the underground working environment and improving the working efficiency of the coal mine tunneling process.

[0076] As Figure 4 Shown, the wire mesh structure includes an inclined plate type elliptical wire mesh 91 disposed inside the housing of the wet spray dust reduction unit 6, and the inclined plate type elliptical wire mesh 91 is correspondingly arranged with the atomizing nozzle 7. The inclined plate type elliptical wire mesh 91 is made of at least one layer of corrosion-resistant stainless steel wire mesh. The droplets sprayed by the nozzle 7 are in full contact with the dust and impact on the inclined plate type elliptical wire mesh 91, fully wetting the dust, and the fine dust is captured by the wire mesh. Different numbers of layers of corrosion-resistant stainless steel wire mesh can be selected in specific applications.

[0077] As Figure 5 And Figure 6 Shown, the wire mesh structure includes a conical wire mesh 92 disposed at the end of the housing 10 of the wet spray dust reduction unit 6, and the specific surface area of the conical middle wire mesh 92 is greater than 2πRL; where L is the length of the housing of the wet spray dust reduction unit, and R is the radius of the cross-section of the housing, thereby improving the dust filtering ability and the high-speed dust removal efficiency.

[0078] Among them, the conical wire mesh 92 includes a conical framework and a wire mesh arranged inside the conical framework; the conical framework includes an outer lining 921 and an inner lining 922. Both the outer lining 921 and the inner lining 922 are made of thin iron wires, and the outer lining 921 and the inner lining 922 form a conical structure. The wire mesh is arranged between the outer lining 921 and the inner lining 922; the wire mesh adopts at least corrosion-resistant stainless steel wire mesh 923. In specific applications, one layer, two layers, three layers or more layers of corrosion-resistant stainless steel wire mesh 923 can be adopted as needed to capture fine dust.

[0079] In Figure 5 and Figure 6 In the illustrated embodiment, the droplets sprayed by the atomizing nozzle 7 are in full contact with the dust and impact the conical wire mesh 92, fully wetting the dust, and fine dust is captured by the wire mesh; moreover, the tapered end of the conical wire mesh has two functions. The first function is: dust collection, and the second function is: reducing the drift of water. The tapered end can be connected to the housing 10 as needed, or the end of the conical wire mesh 92 can be connected to the housing 10. In Figure 5 In the illustrated embodiment, the end of the conical wire mesh 92 is connected to one end of the housing 10. In Figure 6 In the illustrated embodiment, the tapered part of the conical wire mesh 92 is connected to one end of the housing 10. In specific applications, a suitable connection method can be selected according to actual requirements.

[0080] It should be noted that the wire mesh structure arranged at the end of the housing 10 of the wet spray dust reduction unit 6 is a structure with a gradually shrinking radial cross-section, and such a structure is called the conical wire mesh 92. The conical wire mesh 92 filters the dust-containing droplets in the high-speed fog-dust mixed airflow. Under the action of the steep pressure drop effect, the sputtered dust-containing droplets are intercepted by the conical wire mesh 92, and under the adsorption effect of the wire mesh, the dust-containing droplets form a slurry on the surface of the wire mesh, enabling the wire mesh to play a role in dust removal.

[0081] In the embodiment of the present invention, the wire mesh structure 9 can adopt an inclined plate elliptical wire mesh 91, a conical wire mesh 92 as needed, or the inclined plate elliptical wire mesh 91 and the conical wire mesh 92 can be used in combination. In specific applications, the specific structure of the wire mesh structure 9 is set according to the actual situation.

[0082] In the embodiment of the present invention, a dust wastewater discharge port 911 is provided at the connection position between the wire mesh structure 9 and the slurry collecting tank 11. When the wire mesh structure captures the dust-containing droplets, the dust-containing droplets flow into the slurry collecting tank 11 along the dust wastewater discharge port 911.

[0083] In the present invention, the spray system includes an atomizing nozzle 7 arranged corresponding to the wire mesh structure, a slurry circulation pump 15 and a make-up water pipe 12 communicated with the slurry storage tank 23, a circulation pipeline 8 communicated with the slurry circulation pump 15, and an outer discharge pipeline arranged at the pump outlet of the slurry circulation pump 15. Among them, a first control valve is arranged at one end of the circulation pipeline 8 and is connected to the atomizing nozzle 7, and a second control valve 13 is arranged at the other end of the circulation pipeline 8 and is connected to the pump outlet of the slurry circulation pump 15; a pump inlet filter 16 is arranged at the inlet of the slurry circulation pump 15, and the slurry is filtered by the pump inlet filter 16 and then transported to the atomizing nozzle 7 through the slurry circulation pump 15 and the circulation pipeline 8; the make-up water pipe 12 is used to supplement liquid to the slurry storage tank 23, and it can be known whether the liquid in the slurry storage tank 23 can reach the preset liquid level through the measurement of the liquid level gauge 26 of the storage tank; a third control valve 14 is arranged on the outer discharge pipeline, and the liquid in the slurry storage tank 23 is discharged through the outer discharge pipeline under the control of the third control valve 14. Among them, the atomizing nozzle 7 is arranged on the same side or both sides of the wire mesh structure 9, and several are arranged according to needs; the atomizing nozzle 7 adopts a liquid atomizing nozzle or a gas-liquid mixing atomizing nozzle. In specific applications, a suitable atomizing nozzle 7 is selected according to the actual situation for water mist spraying.

[0084] A storage tank drain pipe 19 is arranged at the lower part of the slurry storage tank 23 to discharge a small amount of slurry to the liquid discharge facility in the roadway, and then fresh water is replaced again for circulating spray dust reduction treatment; according to needs, continuous automatic operation can also be carried out by continuously discharging a small amount of slurry and replenishing an equal amount of water. Preferably, the lower part of the slurry storage tank 23 is arranged in the structural form of a lower liquid collecting cone 25 of the storage tank, which is more conducive to the discharge of the storage tank drain pipe 19.

[0085] In the present invention, an adjusting assembly for adjusting the height and angle of the slurry storage tank 23 is arranged at the bottom of the slurry storage tank 23. The adjusting assembly includes: a middle support column 20 arranged in the middle area at the bottom of the slurry storage tank 23 and a middle ear 30 for strengthening the middle support column, corner support columns 18 respectively arranged at the corner positions at the bottom of the slurry storage tank 23 and corner ears 24 for strengthening the corner support columns 18, a crossbeam ear 35 arranged on the bottom crossbeam of the slurry storage tank 23, and a driving component 37 arranged between the crossbeam ear 35 and the middle support column 20; the driving component 37 can adopt a swing cylinder or a hydraulic cylinder with pin shaft holes 21 at both ends.

[0086] Among them, a first pin shaft 29 is arranged on the middle support column 20, and the driving component 37 drives the slurry storage tank 23 to swing around the first pin shaft 29 to a preset position. Among them, arc-shaped long holes 17 are respectively arranged on each corner support column 18, and the slurry storage tank 23 is locked at the preset position of the arc-shaped long holes 17 through bolts 27 and nuts 28.

[0087] Wherein, pin holes 21 are provided at both ends of the swing cylinder or hydraulic cylinder member, and are inserted and fixedly fitted on the second pin 36 of the crossbeam support ear 35 and the third pin 38 on the middle support column 20, and are locked and fixed to prevent them from coming out during work.

[0088] During the specific use process, when the slurry storage tank 23 needs to adjust the front and rear heights and inclination angles to adapt to the front and rear height differences of the roadway, an instruction is issued through the control system to control the cylinder or hydraulic cylinder, shorten or extend the swing cylinder, thereby driving the slurry storage tank 23 to follow and adjust the front and rear heights and angles around the first pin 29, so as to achieve the adaptation of the equipment to the roadway terrain. After the equipment is adjusted to the appropriate position and angle, the bolts 27 and nuts 28 on the corner support column 18 are locked to prevent the equipment from being unstable during operation. When the angle and height need to be adjusted next time, loosen the bolts 27 and nuts 28 and make a new adjustment.

[0089] In the specific application, according to the needs, the front and rear heights and angles of the equipment are automatically and continuously adjusted through the adjustment assembly to ensure that the adaptation to the roadway terrain can be quickly achieved.

[0090] During the specific use process of the present invention, before the dust reduction device is started, first open the valve of the water supply pipe 12, and control the display through the liquid level gauge 26 of the storage tank to fill the slurry storage tank 23 with water to an appropriate liquid level height. Then start the slurry circulation pump 15, and the slurry starts to circulate and spray through the slurry circulation pipeline 8 and the atomizing nozzle 7. Finally, after being collected by the slurry collecting tank 11, it enters the lower slurry storage tank 23, thereby forming a complete slurry spraying and circulating process.

[0091] When the equipment is running normally, the A-direction dust-containing air flow coming from the front-end dust extraction air pipe first passes through the wet spray dust reduction unit 6, is intercepted and filtered by mechanical collision with the wire mesh structure 9, and at the same time, under the action of the water mist spraying of the atomizing nozzle 7, the dust in the air flow is effectively captured, that is: the mist droplets sprayed by the spraying system are combined with the high-speed dust-containing air flow to form a high-speed mist-dust mixed air flow. Under the adsorption effect of the wire mesh, the dust-containing mist droplets in the high-speed mist-dust mixed air flow form slurry on the surface of the wire mesh, and the slurry flows into the lower slurry collecting tank 11, and finally enters the lower slurry storage tank 23 through the liquid discharge pipe 22, and the purified qualified air flow is discharged into the roadway space; finally, the slurry collected into the slurry storage tank 23, through the spraying system, continuously performs the operations of filtering - spraying - washing in a cycle, and continuously performs high-efficiency purification treatment on the dust-containing air flow, so as to achieve the high-efficiency wet capture and dust reduction and qualified treatment of the dust-containing air flow during the tunneling process.

[0092] During the dust settling process, according to the dust content in the air flow during the mining process, after the circulating spraying process has been carried out to a certain extent, the dust concentration in the slurry will become higher and higher. When a relatively high slurry concentration is reached, a small amount of slurry is discharged through the external discharge pipe at the outlet of the slurry circulation pump 15 or through the drain pipe 19 at the bottom of the slurry storage tank 23 into the liquid discharge facility in the roadway, and then fresh water is replaced again to carry out the circulating spraying dust settling treatment; as needed, continuous automatic operation can also be carried out by continuously discharging a small amount of slurry and replenishing an equal amount of water. Preferably, the lower part of the slurry storage tank 23 is arranged in the structural form of a liquid collecting cone 25 at the lower part of the storage tank, which is more conducive to the discharge of the drain pipe 19 of the storage tank.

[0093] As the tunneling process progresses to different working positions, there may be a height difference between the front and rear ground surfaces. The wet spray dust settling unit 6 will tilt. At this time, the slurry storage tank 23 adjusts the front and rear position angles through the adjustment assembly to adapt to the change in the ground height difference and match the height of the wet spray dust settling unit 6.

[0094] Through the above-mentioned wet dust settling method and device for the mining tunneling process of the invention, by combining the wet spray dust settling unit, the slurry storage tank with adjustable angle and height, and the spraying system, the dust-containing air flow generated during the underground tunneling process is processed, and the effects of dust removal and dust settling with safety, high efficiency and low water consumption can be achieved, thereby greatly improving the underground working environment and improving the working efficiency of the coal mining tunneling process.

[0095] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the description and drawings of the present invention under the concept of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A wet dust reduction method during the mining tunneling process, characterized in that, Including: Spraying the high-speed dust-laden air flow in the wet spray dust suppression unit through a spraying system, so that the droplets sprayed by the spraying system are combined with the high-speed dust-laden air flow to form a high-speed fog and dust mixed air flow. Among them, the high-speed fog and dust mixed air flow includes dust-containing droplets. The spraying system includes an atomizing nozzle for spraying droplets, and the wet spray dust suppression unit includes a wire mesh structure; Filtering the dust-containing droplets in the high-speed fog and dust mixed air flow through the wire mesh structure, and discharging the filtered air flow into the roadway space. And, under the adsorption effect of the wire mesh structure, the dust-containing droplets form a slurry on the surface of the wire mesh structure; and, the slurry falls into the slurry collecting tank under the action of gravity.

2. The wet dust suppression method during the mining tunneling process according to claim 1, characterized in that The wire mesh structure includes a conical wire mesh arranged at the end of the housing of the wet spray dust suppression unit. The specific surface area of the conical wire mesh is greater than 2πRL, where L is the length of the housing of the wet spray dust suppression unit, and R is the radius of the cross-section of the housing.

3. The wet dust suppression method during the mining tunneling process according to claim 1 or 2, characterized in that The wire mesh structure includes an inclined plate type elliptical wire mesh arranged inside the housing of the wet spray dust suppression unit, where The inclined plate type elliptical wire mesh is arranged corresponding to the atomizing nozzle, and the inclined plate type elliptical wire mesh includes at least one layer of corrosion-resistant stainless steel wire mesh.

4. The wet dust suppression method during the mining tunneling process according to claim 2, characterized in that The conical wire mesh includes a conical skeleton and at least one layer of corrosion-resistant stainless steel wire mesh arranged inside the conical skeleton; where The conical skeleton includes an inner lining and an outer lining. Both the inner lining and the outer lining are made of thin iron wire. The inner lining and the outer lining form a conical structure, and the corrosion-resistant stainless steel wire mesh is arranged between the inner lining and the outer lining.

5. The wet dust reduction method for the mining tunneling process according to claim 1, characterized in that, It also includes: Introducing the slurry in the slurry collecting tank into the slurry storage tank through a liquid discharge pipe; Providing the slurry in the slurry storage tank to the wet spray dust suppression unit through the spraying system to remove dust from the high-speed fog and dust mixed air flow.

6. A wet dust suppression device during the mining tunneling process, characterized in that, Including: A spraying system, a wet spray dust suppression unit, a slurry collecting tank arranged below the wet spray dust suppression unit, and a slurry storage tank communicated with the slurry collecting tank, where The spraying system is used to spray droplets into the wet spray dust suppression unit through an atomizing nozzle; The wet spray dust suppression unit includes a cylindrical housing and a wire mesh structure connected to the housing. The wire mesh structure is used to filter the dust-containing droplets in the high-speed fog and dust mixed air flow formed by the droplets and the high-speed dust-laden air flow.

7. The wet dust suppression device during the mining tunneling process according to claim 6, characterized in that The wire mesh structure includes a conical wire mesh arranged at the end of the housing of the wet spray dust suppression unit. The specific surface area of the conical wire mesh is greater than 2πRL, where L is the length of the housing, and R is the radius of the cross-section of the housing.

8. The wet dust suppression device during the mining tunneling process according to claim 6 or 7, characterized in that The wire mesh structure includes an inclined plate-shaped elliptical wire mesh disposed inside the housing of the wet spray dust suppression unit, and the inclined plate-shaped elliptical wire mesh is correspondingly arranged with the atomizing nozzles; the inclined plate-shaped elliptical wire mesh includes at least one layer of corrosion-resistant stainless steel wire mesh.

9. The wet dust suppression device for mining tunneling process according to claim 7, wherein The conical wire mesh includes a conical skeleton and at least one layer of corrosion-resistant stainless steel wire mesh disposed inside the conical skeleton; wherein, The conical skeleton includes an inner lining and an outer lining, both the inner lining and the outer lining are made of thin iron wire, the inner lining and the outer lining form a conical structure, and the corrosion-resistant stainless steel wire mesh is disposed between the inner lining and the outer lining.

10. The wet dust suppression device for mining tunneling process according to claim 6, wherein The slurry collecting tank is communicated with the slurry storage tank through a liquid discharge pipe.

11. The wet dust suppression device for mining tunneling process according to claim 6, wherein The spraying system includes atomizing nozzles correspondingly arranged with the wire mesh structure, a slurry circulation pump and a makeup water pipe communicated with the slurry storage tank, a circulation pipeline communicated with the slurry circulation pump, an outer discharge pipeline disposed at the pump outlet of the slurry circulation pump, and a pump inlet filter disposed at the inlet of the slurry circulation pump, wherein, The atomizing nozzles are correspondingly arranged on the same side or both sides of the wire mesh structure, and the atomizing nozzles adopt liquid atomizing nozzles or gas-liquid mixing atomizing nozzles; The makeup water pipe is used for supplementing liquid to the slurry storage tank; A first control valve is provided at one end of the circulation pipeline and is connected to the atomizing nozzles, a second control valve is provided at the other end of the circulation pipeline and is connected to the pump outlet of the slurry circulation pump; A third control valve is provided on the outer discharge pipeline, and under the control of the third control valve, the liquid in the slurry storage tank is discharged through the outer discharge pipeline.

12. The wet dust suppression device for mining tunneling process according to claim 6, wherein An adjusting assembly for adjusting the height and angle of the slurry storage tank is provided at the bottom of the slurry storage tank, wherein, The adjusting assembly includes: a middle support column disposed in the middle area of the bottom of the slurry storage tank and a middle support ear for strengthening the middle support column, corner support columns respectively disposed at the corner positions of the bottom of the slurry storage tank and corner support ears for strengthening the corner support columns, a crossbeam support ear disposed on the bottom crossbeam of the slurry storage tank, and a driving component disposed between the crossbeam support ear and the middle support column; wherein, A pin shaft is provided on the middle support column, and the driving component drives the slurry storage tank to swing around the pin shaft to a preset position, wherein arc-shaped long holes are respectively provided on each corner support column, and the slurry storage tank is locked at the preset position of the arc-shaped long holes through bolts and nuts.

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