A demisting and dust reduction device for coal mine transportation tunnel

Abstract

The present invention relates to a demisting and dust reduction device for coal mine transportation lanes, belonging to the technical field of coal mine drilling machines. It comprises a spray system, a dust collecting device and a demisting device arranged in sequence along the wind direction, the spray system comprises nozzles arranged around the lane; the nozzles are provided with water spray ports, the water spray ports are aimed at the dust collecting device, the dust collecting device covers the entire lane section of the demisting and transportation device, and the side of the dust collecting device away from the nozzles is closely provided with a demisting device for condensing water mist after dust removal. The technical problem of poor dust removal effect and water mist affecting the sight distance in the prior art is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine drilling rigs, and in particular relates to a demisting and dust reduction device for a coal mine transportation tunnel. Background Art

[0002] The long-distance coal transportation by transport equipment and the vibration of the return belt in coal mines will generate a large amount of fine dust, which will spread under the action of wind flow and then diffuse throughout the entire tunnel space, causing extremely serious pollution. At present, the main transportation tunnels mostly use cross-sectional spraying measures to settle dust, that is, spray heads are set up in the tunnel to spray water, and the dust reduction effect is only about 50%, and the water mist will diffuse downward for a long distance with the wind flow, causing the water mist and dust to mix and diffuse in the entire tunnel. Although it has achieved a certain dust reduction effect, it affects the line of sight, increases the water mist, increases the air humidity, and worsens the working environment. On the basis of cross-sectional spraying, some mines use dust catching nets together. Although it can intercept dust and water mist to a certain extent, the effect is extremely limited and cannot fundamentally solve the above problems. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a demisting and dust reduction device for coal mine transportation tunnels to solve the technical problems in the prior art that the dust removal effect is poor and water mist is generated to affect the visibility.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A demisting and dust reduction device for a coal mine transport tunnel, wherein a transport device is provided in the tunnel; the device comprises a spray system, a dust collecting device and a demisting device which are sequentially arranged along the wind direction, the spray system comprises nozzles which are arranged around the tunnel; the nozzles are provided with water spray ports which are aimed at the dust collecting device, the dust collecting device covers the entire tunnel section except the transport device, and a demisting device for condensing water mist after dust removal is closely arranged on the side of the dust collecting device away from the nozzle.

[0006] Furthermore, the dust collecting device is a double-layer nylon mesh, and an iron pipe frame for fixing the double-layer nylon mesh is provided around the tunnel.

[0007] Furthermore, the dust collecting device and the demisting device are provided with doors that can be opened and closed.

[0008] Furthermore, the mesh size of the nylon gauze is 5-8 meshes, and the nylon gauze is white.

[0009] Furthermore, the defogger device is formed by arranging a plurality of defogger boxes, the defogger boxes comprising a frame and a plurality of guide plates evenly spaced and clamped in the frame, the frame comprising two clamping plates arranged opposite to each other, the two clamping plates being connected and fixed to form a three-dimensional frame by four cross beams, and clamping grooves for clamping the guide plates are provided on the opposite surfaces of the two clamping plates.

[0010] Furthermore, the cross-sections of the card slot and the guide plate matched with the card slot are both V-shaped, the material of the guide plate is plastic, and the guide plate is provided with textures.

[0011] Furthermore, the cross beams of the frame are provided with through holes for frame connection.

[0012] Furthermore, the defogger device also includes a protective net, which is arranged on the end surface of the defogger box away from the dust collecting device.

[0013] Furthermore, a two-layer demisting box is arranged at the top of the demisting device along the laneway passage, and a single-layer demisting box is arranged at the bottom of the demisting device.

[0014] The beneficial effects of the present invention are:

[0015] Use evenly distributed upwind cross-sectional spray to make the dust in the wind flow fully collide with the fog flow, so that the dust is wet and settled, and then use spray and dense dust-catching nylon gauze to form a water film to quickly capture dust and fog particles in the air, and then use V-shaped guide plates to intercept the remaining dust, fog particles and other mixed flue gases in the tunnel to condense and settle. This method can effectively improve the dust reduction efficiency to more than 90%. After dust removal, the total dust concentration in the main inclined shaft and the main transport tunnel can be reduced to less than 10mg / m3, and the respirable dust can be reduced to less than 8mg / m3. There are basically no visible fog particles in the tunnel, achieving the purpose of tunnel demisting and dust reduction.

[0016] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of a demisting and dust reduction device for coal mine transportation tunnels;

[0019] Figure 2 for Figure 1 AA section diagram,

[0020] Figure 3 It is a schematic diagram of the framework of the demisting box;

[0021] Figure 4 It is a schematic diagram of two pallets;

[0022] Figure 5 Schematic diagram of a V-shaped guide plate.

[0023] Figure numerals: spray system 1, dust collecting device 2, demisting device 3, transportation device 4, iron pipe frame 5, protection net 6, door 7, card plate 8, cross beam 9, card slot 10, V-shaped guide plate 11. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0025] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0026] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is 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 operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] See also Figure 1-5 A demisting and dust reduction device for coal mine transportation tunnels comprises a spray system 1, a dust collecting device 2 and a demisting device 3 which are sequentially arranged along the wind direction.

[0028] The spray system 1 includes nozzles arranged around the tunnel; the nozzles include a plurality of nozzles arranged on a transverse fixed rod at the top of the tunnel, and a plurality of nozzles arranged on a longitudinal fixed rod at the side of the tunnel. Specifically, the straight-line distance between the nozzles and the dust collecting device 2 is about 0.5m, the spacing between the nozzles arranged at the top of the tunnel is 0.6m, and the spacing between the nozzles arranged at the side of the tunnel is 0.8m, and all the nozzles are wide-angle nozzles, which can ensure that the water sprayed by the two groups of nozzles basically covers the entire tunnel section, and the two groups of nozzles are provided with independent water valve switches, which can avoid the technical problem of insufficient water pressure of some end nozzles caused by too many nozzles connected in series.

[0029] The dust collecting device 2 is a double-layer nylon mesh, which is fixed to the iron pipe frame 5 around the tunnel by thin iron wires or cable ties, and the iron pipe frame 5 is fixed to the fixed foot pads set in the tunnel; the double-layer nylon mesh flatly and firmly covers the entire tunnel section except the transport device 4.

[0030] Specifically, the mesh size of the nylon mesh is 5-8 mesh (about 2-4mm in diameter), and the water outlet of the nozzle sprays water tangentially onto the double-layer nylon mesh, forming a very thin water film, which increases the adsorption area; this aperture is conducive to the formation of water film and can also avoid excessive ventilation resistance in the tunnel caused by too small micropore diameter, and has the best dust removal effect. The nylon mesh is white, and the white nylon mesh is opposite to the black coal color. The black and white are obviously conducive to judging the adsorption effect and distribution of coal dust, and determining whether flushing is needed.

[0031] The demisting device 3 is arranged on the side of the dust collecting device 2 away from the nozzle, and is close to the nylon mesh of the dust collecting device 2; it is used for condensing water mist after dust removal. The demisting device 3 is composed of a plurality of demisting boxes arranged to form a demisting layer with one side close to the nylon mesh. The demisting box includes a frame and a plurality of V-shaped guide plates 11 evenly spaced and fixed in the frame. The frame includes two oppositely arranged card plates 8, and the two card plates 8 are connected and fixed by four cross beams 9 to form a three-dimensional frame. The opposite surfaces of the two card plates 8 are provided with an inverted V-shaped card groove 10 for clamping the guide plate. The demisting device 3 also includes a protective net 6, which is arranged on an end face of the demisting box away from the nylon mesh, separating outsiders from the demisting box to form a protective layer to prevent people from directly hitting the demisting box.

[0032] The crossbeam 9 of the frame is provided with through holes for connecting the defogger boxes. Multiple layers of defoggers can be added according to the different water mist concentrations in specific seasons. The defogger boxes are connected side by side, and multiple V-shaped guide plates 11 are combined and spliced. In this embodiment, two layers of defogger boxes are arranged along the roadway at the top of the defogger 3, and the bottom of the defogger 3 is a single-layer defogger box. That is, the top of the roadway is formed by multiple defogger boxes to form two layers of defogger layers, and the V-shaped guide plates 11 are spliced ​​to form an M shape. The double-layer setting increases the wind flow diversion distance, so that the fog particles and the board surface are fully in contact and settled, which is beneficial to defogger; the bottom of the roadway is a single-layer guide plate, which can be conveniently set on the defogger 3 for people to pass through the door 7.

[0033] Preferably, the width of the demisting box is 10 cm, which can facilitate the parallel connection of multiple boxes.

[0034] Preferably, a certain height difference is formed between the two oppositely arranged clamping plates 8, so that after installation, the V-shaped plate guide plate forms a 4 cm vertical offset (height difference) on both sides along the axial direction, which facilitates the flow of water and stains during flushing.

[0035] Preferably, the V-shaped guide plate 11 is made of high-strength plastic with good texture. It is light in weight and convenient for handling and disassembly in the narrow space of the underground belt lane. It is strong and durable, environmentally friendly and safe, and has a good demisting effect. The surface texture structure is conducive to the adhesion and capture of dust and water mist, and water washing is more convenient and not afraid of rust. The plastic V-shaped guide plate 11 has a simple processing technology, flexible disassembly and assembly, and can be densely distributed in multiple layers, which greatly improves its demisting efficiency. The width of the demisting box is 10 cm, the overall thickness is small, and the V-shaped ventilation design is conducive to the passage of wind through the device, which has little effect on the distribution of wind flow in the lane, and effectively avoids the wind flow from the belt conveyor without device arrangement due to the increase of ventilation resistance, thereby ensuring the dust reduction and demisting effect. The demisting device 3 can be kept at a safe distance from the dust removal system and the belt to ensure the safety of the belt operation.

[0036] The dust collecting device 2 and the demisting device 3 are provided with an openable and closable door 7 for people to pass through. The specific installation method is to first provide the dust collecting device 2 with a full-section demisting and dust reduction device with an openable and closable door 7 with demisting and dust reduction functions, which is conducive to the formation of full-section dust reduction and demisting, and ensures the transportation of materials by pedestrians in the lane. According to the dust distribution law of the belt transport lane, the dust concentration is highest at the place close to the belt in the section and close to the belt height. This position is the location of the device door 7. In order to ensure the demisting and dust reduction effect, the door 7 must have the demisting and dust reduction function. Therefore, the left and right door frames of the selected demisting and dust reduction door 7 are square clamp tubes, which are used to clamp the V-shaped guide plate 11, and are staggered by 4 cm to facilitate the flow of water during flushing; the upper and lower door frames are square tubes, which are bolted to the square clamp tubes, and the upwind side is a dust collecting net, and the fixing method is the same as other parts of the device; a rotating part is provided on the door 7 to rotate and open the door 7, and a handle is provided on the other side of the door 7 frame to facilitate the passage of people.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A demisting and dust reduction device for a coal mine transport lane, wherein a transport device is provided in the lane, characterized in that: It comprises a spray system, a dust collecting device and a demisting device which are sequentially arranged along the wind direction, the spray system comprises nozzles arranged around the lane; the nozzles are provided with water spray ports, the water spray ports are aimed at the dust collecting device, the dust collecting device covers the entire lane section of the demisting and transporting device, the side of the dust collecting device away from the nozzles is closely provided with a demisting device for condensing water mist after dust removal; the dust collecting device is a double-layer nylon mesh, and an iron pipe frame for fixing the double-layer nylon mesh is arranged around the lane; the demisting device is arranged by a plurality of demisting boxes The demisting box comprises a frame and a plurality of guide plates evenly spaced and clamped in the frame, the frame comprises two clamping plates arranged opposite to each other, the two clamping plates are connected and fixed to form a three-dimensional frame by four cross beams, and clamping grooves for clamping the guide plates are arranged on the opposite surfaces of the two clamping plates; the cross-sections of the clamping grooves and the guide plates matched with the clamping grooves are both V-shaped, the material of the guide plates is plastic, and the guide plates are provided with textures; a two-layer demisting box is arranged along the top of the demisting device along the laneway channel, and a single-layer demisting box is arranged at the bottom of the demisting device.

2. The demisting and dust reduction device for coal mine transport tunnel according to claim 1, characterized in that: The dust collecting device and the demisting device are provided with doors which can be opened and closed.

3. The demisting and dust reduction device for coal mine transport tunnel according to claim 1, characterized in that: The mesh size of the nylon gauze is 5-8 meshes, and the nylon gauze is white.

4. The demisting and dust reduction device for coal mine transport tunnel according to claim 1, characterized in that: The cross beam of the frame is provided with a through hole for frame connection.

5. The demisting and dust reduction device for coal mine transport tunnel according to claim 1, characterized in that: The demisting device further comprises a protective net, and the protective net is arranged on the end surface of the demisting box body away from the dust collecting device.

Images