Low-pollution coal preparation equipment

Abstract

The invention relates to the technical field of coal dressing equipment, and provides low-pollution coal dressing equipment which comprises a rack, and a vibrating frame is arranged on the rack in a vibrating mode; the annular net is circularly and movably arranged on the vibrating frame and can vibrate along with the vibrating frame, the annular net is provided with a plurality of material distributing sections, the material distributing sections sequentially move to the position above the vibrating frame, the material distributing sections jointly define a containing space, and the containing space is used for containing and separating coal and coal gangue; and after the annular net is configured to circularly move, the blocked material distribution section is far away from the vibration frame. By means of the technical scheme, the technical problems that in the prior art, the process of cleaning the blocked filter screen is tedious, the disassembly and assembly frequency is high in the cleaning process, and the production schedule is affected are solved.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to the technical field of coal preparation equipment, and more specifically, to a low-pollution coal preparation equipment. Background Art

[0002] Dry coal preparation technology has been widely applied and promoted in the coal industry in recent years due to its advantage of relatively low pollution. Its principle is mainly to separate coal and coal gangue by physical or mechanical methods without using a large amount of water. However, there is a problem when the existing dry coal preparation technology uses a screen to separate coal and coal gangue. Since coal and coal gangue are in the screening process, coal gangue particles and coal blocks are likely to get stuck in the mesh holes of the screen, causing the screen to become blocked. Once the screen is blocked, the ventilation of the screen will be hindered, affecting the coal preparation efficiency. To solve the problem of screen blockage, the commonly used method in the industry at present is to clean and disassemble the screen. However, this process is rather cumbersome and will also cause the equipment to stop for a long time, affecting the production progress. Summary of the Invention

[0003] To overcome the above defects, embodiments of the present disclosure provide a low-pollution coal preparation equipment, which solves the technical problems in the prior art that the process of cleaning the blocked filter screen is cumbersome and the disassembly and assembly frequency is relatively high during the cleaning process, affecting the production progress.

[0004] According to one aspect, at least one embodiment of the present disclosure provides a low-pollution coal preparation equipment, including: A frame; A vibrating frame, which is vibratably arranged on the frame; An annular net, which is circularly movably arranged on the vibrating frame and can vibrate following the vibrating frame. The annular net has a plurality of material distribution sections, and the plurality of material distribution sections sequentially move above the vibrating frame. The plurality of material distribution sections together enclose an accommodation space for accommodating and separating coal and coal gangue. The annular net is configured to be circularly moved so that when a material distribution section is blocked, it can be disengaged from the vibrating frame.

[0005] For example, in a low-pollution coal preparation equipment provided by at least one embodiment of the present disclosure, the material distribution section has a plurality of tapered mounting holes arranged at intervals, and further includes: A plurality of air ducts, which are correspondingly arranged in the tapered mounting holes. The air ducts are frustum structures. One end of the air duct is close to the accommodation space, and the other end is outside the accommodation space. The cross-sectional area of the air duct increases sequentially from the end close to the accommodation space to the end far from the accommodation space.

[0006] For example, in a coal preparation device with low pollution provided by at least one embodiment of the present disclosure, the air duct is slidably arranged along the axial direction of the conical mounting hole in the conical mounting hole. One end of the air duct has a notch. After one end of the air duct is configured to slide into the accommodation space, the notch can be opened so that the coal or coal gangue blocked in the air duct can fall off.

[0007] For example, in a coal preparation device with low pollution provided by at least one embodiment of the present disclosure, it further includes: The first clamping plate is arranged on the vibrating frame and within the accommodation space. The first clamping plate has a first avoidance hole; The first sliding plate is slidably arranged on the vibrating frame and located outside the accommodation space. The first sliding plate is configured to slide in the reverse direction close to the first clamping plate, and then can push the air duct to slide along the conical mounting hole so that one end of the air duct passes through the first avoidance hole and slides into the accommodation space.

[0008] For example, in a coal preparation device with low pollution provided by at least one embodiment of the present disclosure, it further includes: The second clamping plate is arranged on the vibrating frame and located outside the accommodation space. The second clamping plate has a second avoidance hole; The second sliding plate is slidably arranged on the vibrating frame and located within the accommodation space. After the second sliding plate slides in the direction close to the second clamping plate, it drives the air duct to reset, and the other end of the air duct passes through the second avoidance hole.

[0009] For example, in a coal preparation device with low pollution provided by at least one embodiment of the present disclosure, it further includes: The circulating moving belt is arranged on the annular net; A plurality of driving wheels are rotatably arranged on the vibrating frame. The plurality of driving wheels are arranged at intervals on the vibrating frame. The driving wheels are used to tension the annular net and divide the annular net into a plurality of material distribution sections. After the driving wheels are configured to rotate, they are used to drive the circulating moving belt to move in a cycle.

[0010] For example, in a coal preparation device with low pollution provided by at least one embodiment of the present disclosure, the vibrating frame has an air passage. The plurality of material distribution sections sequentially move above the air passage, and the air in the air passage can blow the coal above the coal gangue.

[0011] For example, in a coal preparation device with low pollution provided by at least one embodiment of the present disclosure, it further includes: The mounting frame is arranged on the frame in a lifting manner; There are several partition bars, which are horizontally arranged on the mounting frame and located within the accommodation space. The several partition bars are arranged at intervals longitudinally. After the partition bars are configured to descend, they abut against the material distribution section above the vibrating frame, so that adjacent partition bars and the material distribution section cooperate to form a horizontal conveying channel. The horizontal conveying channel is used to convey coal gangue, and the coal longitudinally moves out of the accommodation space.

[0012] For example, in a coal separation device with low pollution provided by at least one embodiment of the present disclosure, it further includes: A support plate, which is arranged to be lifted and lowered within the air passage. The support plate has several air passage gaps, and the air passage, the air passage gaps, and the air passage tube are sequentially communicated.

[0013] For example, in a coal separation device with low pollution provided by at least one embodiment of the present disclosure, it further includes: A feeding member, which is arranged on the frame. The feeding member has a feeding channel, and the feeding channel leads to the accommodation space.

[0014] The beneficial effects of the embodiments of the present disclosure are as follows: In the present disclosure, the vibrating frame is installed on the frame through a shock absorption device, and it can vibrate relative to the frame. For example, a spring connection or other methods can be adopted. The annular net is arranged on the vibrating frame through a transmission device. The transmission device, such as a chain and sprocket structure, enables the annular net to move in a cycle and vibrate together with the vibrating frame. The annular net is pre-designed to have multiple material distribution sections, and these material distribution sections sequentially move above the vibrating frame. The material distribution sections together enclose an accommodation space for accommodating coal and coal gangue. When the vibrating frame vibrates, the coal and coal gangue in the accommodation space can be separated. When the material distribution section above the vibrating frame is blocked, move the annular net so that the blocked material distribution section can automatically move away from the vibrating frame under the action of the transmission device, and the unblocked material distribution section moves above the vibrating frame to continue separating coal and coal gangue.

[0015] Through the cyclic movement of the annular net, the blocked material distribution section can be timely moved away from the working area, avoiding the influence of the blocked material distribution section on the coal separation efficiency, ensuring that the device continuously and efficiently separates coal and coal gangue, and at the same time reducing the frequency of manual cleaning of the blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments of the present disclosure. Obviously, the following drawings are only some exemplary embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the exemplary embodiments of the present disclosure and these drawings.

[0017] Figure 1Schematic diagram of a partial structure of a coal preparation device with low pollution in an embodiment of the present disclosure; Figure 2 For Figure 1 Schematic diagram of the structure of the annular net in the embodiment of Figure 3 For Figure 1 Schematic diagram of the structure when the notch is open in the embodiment of Figure 4 For Figure 1 Schematic diagram of the structure when the notch is closed in the embodiment of Figure 5 For Figure 1 Schematic diagram of the structure of the air passage in the embodiment of Figure 6 For Figure 1 Schematic diagram of the structure of the air duct in the embodiment of

[0018] In the figure: 1. Frame, 2. Vibration frame, 3. Annular net, 31. Material distribution section, 32. Accommodating space, 311. Conical mounting hole, 4. Air duct, 41. Notch, 5. First clamping plate, 51. First avoidance hole, 6. First sliding plate, 7. Second clamping plate, 71. Second avoidance hole, 8. Second sliding plate, 9. Circulating moving belt, 10. Driving wheel, 21. Air passage, 11. Air supply member, 12. Mounting frame, 13. Partition strip, 14. Support plate, 141. Air passage gap, 15. Feeding member, 151. Feeding channel. Detailed implementation manners

[0019] The following further elaborates on the present disclosure in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are merely for explaining the present disclosure and not for limiting the present disclosure.

[0020] To make the drawings concise, only the parts related to the disclosure are schematically shown in each drawing, and they do not represent the actual structure of the product. Additionally, to make the drawings concise and easy to understand, in some drawings, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also can mean "more than one" situation, and "several" includes "two" and "more than two".

[0021] In this article, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0022] In this disclosure, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may also include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0023] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "left" and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operations, 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 this disclosure.

[0024] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

[0025] As Figures 1 to 5 shown, it shows a low-pollution coal preparation device in an embodiment of this disclosure. The vibrating frame 2 is installed on the frame 1 through a shock-absorbing device, and it can vibrate relative to the frame 1, for example, by means of spring connection. The annular net 3 is arranged on the vibrating frame 2 through a transmission device, and the transmission device is, for example, a chain and sprocket structure, so that the annular net 3 can move circularly and can vibrate together with the vibrating frame 2. The annular net 3 is pre-designed to have a plurality of material distribution sections 31, and these material distribution sections 31 move to the upper part of the vibrating frame 2 in sequence. The material distribution sections 31 jointly enclose a containing space 32 for containing coal and coal gangue. When the vibrating frame 2 vibrates, the coal and coal gangue in the containing space 32 can be separated. When the material distribution section 31 above the vibrating frame 2 is blocked, move the annular net 3 so that the blocked material distribution section 31 can automatically move away from the vibrating frame 2 under the action of the transmission device, and the unblocked material distribution section 31 moves to the upper part of the vibrating frame 2 to continue separating coal and coal gangue.

[0026] Through the circular movement of the annular net 3, the blocked material distribution section 31 can be timely moved away from the working area, avoiding the influence of the blockage of the material distribution section 31 on the coal preparation efficiency, ensuring that the device continuously and efficiently separates coal and coal gangue, and at the same time reducing the frequency of manual cleaning of blockages.

[0027] As Figure 1As shown, there are several mounting holes arranged at intervals on the material distribution section 31. The air ducts 4 are installed in these mounting holes one by one. The mounting holes are of frustum structure, and the air ducts 4 also adopt the frustum structure. The outer wall of the air duct 4 contacts the inner wall of the mounting hole. The end with the smaller cross-sectional area of the air duct 4 is close to the accommodation space 32, and the end with the larger cross-sectional area is located outside the accommodation space 32. During installation, the air duct 4 can be fixed in the mounting hole by interference fit or using fastening devices. The air duct 4 adopts the frustum structure, which can converge and guide the air to the coal and coal gangue in the accommodation space 32. Since the cross-sectional area gradually decreases towards the accommodation space 32, the air flow velocity will continuously increase when the air passes through the air duct 4, forming an accelerating air flow. This high-speed air flow can act more powerfully on the coal and coal gangue, making the movement states of the coal and coal gangue under the action of wind force significantly different, with the coal above and the coal gangue below, thus improving the sorting effect of the wind on the two. The frustum structure itself reduces the possibility of coal or coal gangue getting stuck in the air duct 4. Even if some materials accidentally get stuck in the air duct 4, as the coal and coal gangue are squeezed against each other in the direction of the air duct 4, due to the continuously increasing diameter of the air duct 4, the stuck materials can also break away from the air duct 4.

[0028] As Figure 3 , Figure 4 shown, the air duct 4 slides axially along the mounting hole. A notch 41 is machined at one end of the air duct 4 close to the accommodation space 32. During the operation of the equipment, if the air duct 4 becomes blocked, first use the driving device to move the material distribution section 31 away from above the vibrating frame 2, and then use another driving device to push the air duct 4 to slide into the accommodation space 32. After one end of the air duct 4 slides into the accommodation space 32, since there is no limit of the mounting hole at the notch 41, the notch 41 automatically opens and becomes larger, and the coal or coal gangue can automatically fall off. One end of the air duct 4 can adopt the structure of a spring piece. When there is no limit, the notch 41 is in the open state. When the notch 41 is located in the mounting hole, it is squeezed by the mounting hole, and the two side walls of the notch 41 contact each other, reducing the diameter of one end of the air duct 4. The notch 41 machined at one end of the air duct 4 close to the accommodation space 32 cooperates with the design of the axial sliding of the air duct 4 along the mounting hole to realize the automatic cleaning function of the air duct 4. When the air duct 4 becomes blocked during the operation of the equipment, use the driving device to move the material distribution section 31 away from above the vibrating frame 2, and then use another driving device to push the air duct 4 to slide into the accommodation space 32. After one end of the air duct 4 slides into the accommodation space 32, there is no limit of the mounting hole at the notch 41, and it automatically opens and becomes larger, enabling the coal or coal gangue blocked in the air duct 4 to automatically fall off. This automatic cleaning mechanism does not require manual intervention, not only saving a large amount of labor costs, but also avoiding long-term downtime of the equipment due to untimely manual cleaning, ensuring the continuous and efficient operation of the equipment.

[0029] As Figure 2As shown in the figure, the first clamping plate 5 is fixedly arranged on the vibrating frame 2. The first clamping plate 5 is located within the accommodation space 32, and a first avoidance hole 51 is machined on the first clamping plate 5. The first sliding plate 6 is arranged on the vibrating frame 2 through a sliding structure such as a slide rail or a telescopic member. The first sliding plate 6 is located outside the accommodation space 32.

[0030] When it is necessary to clean the blocked coal or coal gangue in the air duct 4, the driving member drives the first sliding plate 6 to slide in the direction close to the first clamping plate 5. During this process, the first clamping plate 5 and the first sliding plate 6 can first tightly clamp the material distribution section 31 of the annular net 3, and then use their cooperation to push the air duct 4 to slide along the installation hole, effectively ensuring the stability of the air duct 4 during the sliding process. Because without the fixing effect of the first clamping plate 5, only relying on the first sliding plate 6 to contact the air duct 4 after approaching the material distribution section 31 and push it to slide, due to the fact that the material distribution section 31 may deform and displace due to vibration and other factors during the operation of the equipment, it is very easy to cause some of the air ducts 4 to be unable to slide, and thus the purpose of automatic cleaning cannot be achieved. However, through the collaborative work of the first clamping plate 5 and the first sliding plate 6, it is ensured that the air ducts 4 in the clamping area of the first sliding plate 6 and the first clamping plate 5 can all slide along the axial direction of the installation hole, enabling the notch 41 to open to clean the blockage, improving the reliability and success rate of cleaning the air duct 4.

[0031] The first sliding plate 6 serves as the power source for cleaning the blockage of the air duct 4, and the mechanical structure formed with the first clamping plate 5 is relatively simple. Its components such as slide rails and telescopic members are all common mechanical parts, with mature manufacturing processes and low costs. During the daily maintenance of the equipment, the replacement and repair of these parts are very convenient. As Figure 2 As shown in the figure, the second clamping plate 7 is fixed on the vibrating frame 2. The second clamping plate 7 is located outside the accommodation space 32, and a second avoidance hole 71 is machined on the second clamping plate 7. The second sliding plate 8 slides on the vibrating frame 2 through a sliding structure or a telescopic member. The second sliding plate 8 is located within the accommodation space 32. When it is necessary to reset the slid air duct 4, the driving member drives the second sliding plate 8 to slide in the direction close to the second clamping plate 7, and the second sliding plate 8 drives the air duct 4 to reset, and the other end of the air duct 4 passes through the second avoidance hole 71 and returns to the initial position.

[0032] The second clamping plate 7 is fixed on the vibration frame 2 and is located outside the accommodating space 32. The second sliding plate 8 slides on the vibration frame 2 through a sliding structure or a telescopic member and is located inside the accommodating space 32. When it is necessary to reset the air duct 4 after sliding, the second sliding plate 8 is driven by the driving member to slide toward the second clamping plate 7, and the second sliding plate 8 drives the air duct 4 to reset, and the other end of the air duct 4 passes through the second avoidance hole 71 to return to the initial position. This structure is similar to the principle of the first clamping plate 5 and the first sliding plate 6. Its important function is to ensure that the air duct 4 can be reset after the blockage is cleared. Only after the air duct 4 is reset can it move to the top of the vibration frame 2 again with the material distribution section 31 to participate in the next round of coal preparation work, thereby realizing the recycling and reuse of the material distribution section 31. If the air duct 4 cannot be reset, the circulation mechanism of the material distribution section 31 will be broken, and the coal preparation efficiency of the equipment will be greatly reduced. The second plate and the second sliding plate 8 ensure that the air duct 4 can be reset after the blockage is cleared, so that the reset air duct 4 can move to the top of the vibration frame 2 along with the material distribution section 31, thereby realizing the recycling and reuse of the material distribution section 31.

[0033] like Figure 2 As shown, a circulating moving belt 9 is installed on the ring net 3, and is fixed to the ring net 3 by reliable means such as welding or bolt connection. Several driving wheels 10 installed on the vibration frame 2 are installed on the vibration frame 2 through a rotating structure such as a bearing, and multiple driving wheels 10 are arranged at intervals. On the one hand, the driving wheel 10 plays a tensioning role on the ring net 3, ensuring that the ring net 3 always maintains a suitable tension during the movement process, avoiding relaxation or shaking, and ensuring the stability of the movement of the ring net 3. On the other hand, the driving wheel 10 divides the ring net 3 into several material distribution sections 31, and the driving wheel 10 is driven to rotate by a power device such as a motor, and the circulating moving belt 9 is driven to circulate during the rotation process, thereby driving the ring net 3 to circulate. The circulating moving belt 9 can be a chain, and the driving wheel 10 can be a sprocket, which can realize the cyclic movement of the ring net 3, ensuring that the material distribution section 31 can be moved to the working position (above the vibration frame 2) and away from the blocking area in an orderly manner.

[0034] The arrangement of the circulating moving belt 9 and the driving wheel 10 enables the material distribution sections 31 to circulate in an orderly manner. When a material distribution section 31 has a problem or is blocked, it can be quickly moved to a specific maintenance area for processing without affecting the normal operation of other material distribution sections 31. At the same time, this structure facilitates regular maintenance and inspection of the equipment. The maintenance personnel can observe and detect the material distribution sections 31 at different positions during the operation of the equipment, and timely discover potential problems and handle them.

[0035] like Figure 5As shown in the figure, the air supply component 11 installed on the rack 1, such as a fan, connects its air outlet to the air passage 21 pre-designed and processed on the vibrating rack 2 through a connecting structure such as a flexible pipe. When the equipment is running, the air supply component 11 supplies air to the air passage 21, and the air flow blows upward through the air passage 21, which can blow the coal above the coal gangue. Under the dual action of gravity and wind force, the coal and the coal gangue are separated. The setting of the air supply component 11 utilizes wind force to assist in the separation of coal and coal gangue, improves the accuracy and efficiency of coal separation, can more effectively separate coal and coal gangue, and reduces the residue of coal in the coal gangue.

[0036] such as Figure 5 As shown in the figure, a lifting mechanism installed in the air passage 21 mounts the support plate 14 thereon, enabling the support plate 14 to be lifted and lowered according to the actual coal separation requirements. When the equipment is running, the height of the support plate 14 is adjusted through the lifting mechanism, which can support the material distribution section 31 located above the air passage 21. During the coal separation process, the material pressure borne by the material distribution section 31 is mainly borne by the support plate 14, rather than directly acting on the deformable annular net 3. Because the annular net 3 is prone to problems such as wear and deformation under the long-term action of material pressure and vibration, affecting its service life. Through the supporting effect of the support plate 14, the burden on the annular net 3 can be effectively reduced, thereby extending the service life of the annular net 3.

[0037] A number of air passage gaps 141 are processed on the support plate 14, ensuring the sequential connection of the air passage 21, the air passage gaps 141, and the air passage tube 4. The air passage gaps 141 can not only ensure that the air flow can pass through the support plate 14 and continue to act upward on the coal and coal gangue to achieve the effect of wind separation, but also avoid interference between the support plate 14 and the air passage tube 4 during the lifting and lowering process. While ensuring the ventilation effect, the support plate 14 has sufficient strength to support the material distribution section 31, enabling the ventilation system and the support system to work together during the operation of the equipment.

[0038] such as Figure 1 As shown in the figure, the feeding component 15 is processed with a feeding passage 151, and its outlet leads to the accommodation space 32. During feeding, the mixed material of coal and coal gangue can enter the accommodation space 32 through the feeding passage 151. The inclined arrangement of the feeding passage 151 cooperates with the inclined material distribution section 31 and the air supply component. The side of the material distribution section 31 close to the outlet of the feeding passage 151 is higher, which helps the coal and coal gangue to be separated on the material distribution section 31 under the action of gravity and wind force. The setting of the feeding component 15 enables the coal and coal gangue to continuously enter the accommodation space 32 for separation, avoiding the occurrence of equipment shutdown.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure rather than to limit them. Although the present disclosure has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present disclosure can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present disclosure, and they should all be covered within the scope of the claims of the present disclosure.

Claims

1. A low-pollution coal preparation equipment, characterized in that: include: Rack(1); A vibration frame (2) vibratingly arranged on the frame (1); An annular net (3) is arranged on the vibration frame (2) in a cyclical manner and can vibrate along with the vibration frame (2). The annular net (3) has a plurality of material dividing sections (31). The plurality of material dividing sections (31) move successively to the top of the vibration frame (2). The plurality of material dividing sections (31) together enclose a receiving space (32). The receiving space (32) is used to receive and separate coal and coal gangue. The annular net (3) is configured to move cyclically so as to move away from the vibration frame (2) when the material dividing sections (31) are blocked.

2. A low-pollution coal preparation equipment according to claim 1, characterized in that: The material distribution section (31) is provided with a plurality of tapered mounting holes (311) arranged at intervals, and further comprises: A plurality of air ducts (4) are correspondingly arranged in the conical mounting hole (311); the air ducts (4) are of a frustum structure; one end of the air duct (4) is close to the accommodating space (32) and the other end is located outside the accommodating space (32); and the cross-sectional area of ​​the air duct (4) increases from the end close to the accommodating space (32) to the other end away from the accommodating space (32).

3. A low-pollution coal preparation equipment according to claim 2, characterized in that: The air passage tube (4) is axially slidably arranged in the conical mounting hole (311) along the conical mounting hole (311), and one end of the air passage tube (4) has a notch (41). After the one end of the air passage tube (4) slides into the accommodating space (32), the notch (41) can be opened to allow coal or coal gangue blocked in the air passage tube (4) to fall out.

4. A low-pollution coal preparation equipment according to claim 2, characterized in that: Also includes: A first clamping plate (5) is arranged on the vibration frame (2) and in the accommodating space (32), wherein the first clamping plate (5) has a first avoidance hole (51); A first sliding plate (6) is slidably disposed on the vibration frame (2) and is located outside the accommodating space (32). The first sliding plate (6) is configured to push the air passage (4) to slide along the conical mounting hole (311) after sliding in the opposite direction toward the first clamping plate (5), so that one end of the air passage (4) passes through the first avoidance hole (51) and slides into the accommodating space (32).

5. A low-pollution coal preparation equipment according to claim 2, characterized in that: Also includes: A second clamping plate (7) is arranged on the vibration frame (2) and is located outside the accommodating space (32), and the second clamping plate (7) has a second avoidance hole (71); A second sliding plate (8) is slidably disposed on the vibration frame (2) and is located in the accommodating space (32); after the second sliding plate (8) slides in a direction close to the second clamping plate (7), it drives the air passage (4) to return to its original position, and the other end of the air passage (4) passes through the second avoidance hole (71).

6. A low-pollution coal preparation equipment according to claim 1, characterized in that: Also includes: A circulating moving belt (9) arranged on the ring-shaped net (3); A plurality of driving wheels (10) are rotatably mounted on the vibration frame (2), and the plurality of driving wheels (10) are arranged at intervals on the vibration frame (2). The driving wheels (10) are used to tension the ring-shaped net (3) and divide the ring-shaped net (3) into a plurality of material sections (31). The driving wheels (10) are configured to drive the circulating moving belt (9) to move in a circulating manner after being rotated.

7. A low-pollution coal preparation equipment according to claim 2, characterized in that: The vibrating frame (2) has an air passage (21), and a plurality of the material dividing sections (31) are moved sequentially to the top of the air passage (21), and the wind in the air passage (21) can blow the coal to the top of the coal gangue.

8. The low-pollution coal preparation equipment according to claim 1, characterized in that: Also includes: A mounting frame (12) which is arranged on the frame (1) in a lifting manner; A plurality of spacers (13) are transversely arranged on the mounting frame (12) and located in the accommodating space (32). The plurality of spacers (13) are arranged at intervals in the longitudinal direction. The spacers (13) are configured to abut against the material distribution section (31) above the vibrating frame (2) after being lowered, so that the adjacent spacers (13) cooperate with the material distribution section (31) to form a transverse conveying channel, and the transverse conveying channel is used to convey coal gangue and coal to move longitudinally out of the accommodating space (32). The spacers (13) are configured to cancel the abutment with the material distribution section (31) after being raised, so that the material distribution section (31) is away from the top of the vibrating frame (2).

9. The low-pollution coal preparation equipment according to claim 7, characterized in that: Also includes: A support plate (14) is lifted and disposed in the air passage (21); the support plate (14) has a plurality of air passage gaps (141); and the air passage (21), the air passage gaps (141) and the air passage cylinder (4) are sequentially connected.

10. The low-pollution coal preparation equipment according to claim 1, characterized in that: Also includes: A feeding piece (15) is arranged on the frame (1), wherein the feeding piece (15) has a feeding channel (151), and the feeding channel (151) leads to the accommodating space (32).

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