Efficient combined type circulating dust removal equipment for tunnel

Abstract

Efficient combined circulating dust removal equipment for a tunnel comprises a dust collection device and a vertical cyclone separation device which are connected with each other, a hedging inertia separation device is further arranged in the dust collection device, a horizontal cyclone separation device is further connected above the vertical cyclone separation device, and one side of the horizontal cyclone separation device is connected with a power device. The hedging inertia separation device comprises a dust blocking mechanism arranged in the dust collection barrel, and the dust blocking mechanism comprises a plurality of dust blocking sets arranged at intervals in the vertical direction. The lower end of an exhaust pipe in the vertical cyclone separation device is connected with a filter cylinder, the horizontal cyclone separation device comprises a cyclone cylinder which is transversely arranged, one end of the cyclone cylinder is communicated with the upper end of the exhaust pipe, a rotation guiding rod is arranged at the position, corresponding to the exhaust pipe, in the cyclone cylinder, and a backflow pipe is further connected between the cyclone cylinder and the vertical cyclone separation device. Through multi-stage dust removal, dust of different particle sizes is gradually removed, a circulating cyclone dust removal system is formed through the arrangement of the backflow pipe, coarse dust and fine dust are further removed, and the dust removal efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel dust removal, in particular to a tunnel high-efficiency combined circulating dust removal device. Background Art

[0002] With the increasing number of railways and highways, tunnels are often dug in mountainous areas. However, a large amount of dust will be generated during the tunnel blasting construction process. It is difficult to eliminate high-concentration dust in a short time by relying on basic ventilation facilities. Not only will it prolong the time for construction machinery to enter the site, but some micron-level dust will also cause workers to suffer from occupational diseases such as pneumoconiosis. At present, the existing dust removal equipment used in the field of tunnel construction has more or less certain disadvantages. For example, the cyclone dust collector has a low separation efficiency for micron-level dust, and the bag dust collector has a high dust removal efficiency, but it occupies a large area and requires timely cleaning of the filter cartridge. For the narrow working space of the tunnel, the high-concentration dust generated after the face blasting needs to be specially removed for both coarse dust and fine dust to improve the dust removal efficiency. Summary of the invention

[0003] In order to solve the technical problem in the above background technology that it is necessary to simultaneously achieve the special removal of coarse dust and fine dust and improve the dust removal efficiency by circulating dust removal, the present invention provides a tunnel high-efficiency combined circulating dust removal equipment.

[0004] The technical solution of the present invention is as follows:

[0005] A tunnel high-efficiency combined circulating dust removal equipment comprises a dust collecting device and a vertical cyclone separation device connected to each other. A counter-inertial separation device is also arranged inside the dust collecting device. A horizontal cyclone separation device is also connected above the vertical cyclone separation device. A power device is connected to one side of the horizontal cyclone separation device.

[0006] The dust collecting device includes a dust collecting cylinder connected to the vertical cyclone separation device, the counter-inertial separation device includes a dust blocking mechanism arranged inside the dust collecting cylinder, the dust blocking mechanism includes a plurality of dust blocking groups arranged in an upper and lower gap, the dust blocking group includes a strip side baffle and an intermediate baffle arranged transversely, the ends of the side baffle and the intermediate baffle are fixed to the inner wall of the dust collecting cylinder and are arranged in an "eight" shape. The counter-inertial separation device also includes an air inlet pipe that passes through the inside and outside of the dust collecting cylinder, a lower flush pipe is vertically arranged at the lower side of one end of the air inlet pipe located in the dust collecting cylinder, and the lower end of the lower flush pipe extends between the side baffle and the intermediate baffle of the uppermost dust blocking group.

[0007] The vertical cyclone separation device includes a separation cylinder arranged vertically and connected to the dust collection cylinder at the upper end, and an exhaust pipe arranged vertically at the upper end of the separation cylinder and penetrating the inside and outside of the separation cylinder, and the lower end of the exhaust pipe is connected to a filter cartridge. The horizontal cyclone separation device includes a cyclone cylinder arranged horizontally and connected to the upper end of the exhaust pipe at one end, and a swirl guide rod is arranged horizontally inside the cyclone cylinder at a position corresponding to the exhaust pipe. A return pipe is also connected between the end of the cyclone cylinder away from the exhaust pipe and the vertical cyclone separation device.

[0008] The power device comprises an air outlet pipe which is connected with one end of the cyclone away from the exhaust pipe, and an exhaust fan is arranged on the air outlet pipe.

[0009] Turn on the power device to allow the dust-containing gas from the outside to enter the counter-inertial separation device from one end of the air inlet pipe, pass through the lower flush pipe to reach between the side baffle and the middle baffle, and rely on the inertia to make the dust collide with the dust blocking mechanism and be separated. The separated dust falls into the dust collecting barrel, and the purified airflow enters the vertical cyclone separation device. The outer rotating airflow of the vertical cyclone separation device performs centrifugal motion to separate the dust, and the inner rotating airflow rises along the central area, is finely filtered by the filter barrel, and is discharged from the exhaust pipe and enters the horizontal cyclone separation device. The internal guide rod helps the incoming airflow to rotate, and some dust will be deposited on the bottom side wall of the cyclone barrel, discharged from the return pipe, and enter the vertical cyclone separation device again, and dust separation is repeated again and again. The purified airflow is finally discharged to the outside from the outlet pipe. After the dust removal is completed, the power device is turned off and the dust is cleaned.

[0010] Furthermore, the diameter of the end of the return pipe connected to the cyclone is larger than the diameter of the end connected to the separation barrel, so that the dust airflow rotating out of the cyclone barrel can be accelerated when flowing out of the return pipe, preventing the wind speed from being too low, causing the flow to be blocked, and better entering the separation barrel to form a circulating cyclone dust removal system.

[0011] Preferably, the upper end of the separation cylinder is connected to the dust collection cylinder through a venturi tube, and the diameter of the end of the venturi tube connected to the dust collection cylinder is larger than the diameter of the end connected to the separation cylinder, so that the airflow coming out of the dust collection cylinder is accelerated to a certain extent, thereby better performing gas-solid separation in the vertical cyclone separation device.

[0012] Specifically, the interior of the reflux pipe includes a conical reflux chamber that is larger at the top and smaller at the bottom. The lower end of the reflux chamber is provided with a first columnar acceleration chamber, a shuttle-shaped diffusion chamber, and a second columnar acceleration chamber in sequence. A spray pipe is vertically provided in the diffusion chamber. The spray pipe is provided with a plurality of spoilers with triangular cross-sections along its length. The spoilers are arranged with their tips facing the inner wall of the diffusion chamber. The portion of the spray pipe located between two adjacent spoilers is provided with a plurality of spray ports. The inner wall of the diffusion section is provided with a plurality of spoiler blocks with triangular cross-sections. The bottom surface of the spoiler blocks is connected to the inner wall of the diffusion chamber, and the surfaces where the two waistlines are located are both arranged at an obtuse angle to the inner wall of the diffusion section. The end of the second acceleration chamber away from the diffusion chamber is connected to the venturi tube. A water collecting tank is connected to the lower side of the venturi tube opposite to the reflux pipe. The lower end of the spray pipe passes through the venturi tube and extends into the water collecting tank.

[0013] Under the action of the spray pipe, the humidity of the air in the reflux pipe increases, increasing the adhesion between the gases entering it, causing small dust particles to bond into larger dust particles, which are then accelerated and enter the vertical cyclone separation device for circulation and separation. The airflow returning from the cyclone first enters the reflux chamber. The setting of the reflux chamber and the first acceleration chamber can not only provide a buffer space for the reflux gas, but also provide preliminary acceleration for the gas to ensure that it enters the diffusion chamber better. The speed of the gas in the shuttle diffusion chamber begins to decrease, and under the action of the spoiler, the flow trajectory of the gas becomes complex and diverse, the residence time of the gas becomes longer, and the dust adhesion time is increased.

[0014] As a preferred embodiment, the counter-inertial separation device further comprises a U-shaped tube connected to the end of the air inlet pipe away from the dust collecting cylinder, and the opening side of the U-shaped tube is arranged away from the air inlet pipe. The U-shaped tube is arranged vertically, and the two ends of the opening side are respectively an upper air inlet and a lower air inlet, which facilitates the collision when the airflows intersect, changes the movement path of the dust particles, and is beneficial to the next step of inertial dust removal.

[0015] Further preferably, the dust collecting cylinder includes a clean air cylinder connected to the dust shielding group, a funnel-shaped buffer cylinder is connected to the lower end of the clean air cylinder, and a first dust collecting cylinder is also connected below the buffer cylinder. The setting of the buffer cylinder can prevent the dust that falls through the baffle from being lifted up again by the rising airflow.

[0016] Preferably, the length of the swirl rod in the cyclone is not less than the diameter of the exhaust pipe, so as to avoid a small airflow rotation radius due to a too short length, which affects the dust removal efficiency.

[0017] In order to further improve the stability of the structure, the power device also includes a support column with two ends respectively connected to the outlet pipe and the side wall of the venturi tube.

[0018] Through the above design, the beneficial effects of the present invention are:

[0019] 1) The lower air inlet and the upper air inlet are combined into a U-shaped overall air inlet structure, which helps the collision when the airflows meet, changes the movement path of the dust particles, and is conducive to the next step of inertial dust removal. The side baffles and the middle baffles are arranged equidistantly up and down in the dust collecting tube, so that the airflow flowing in from the lower flushing pipe passes through the middle of the dust shield group, changing the original movement trajectory of the dust, causing it to hit the baffle and fall down.

[0020] 2) By setting a filter cartridge at the lower end of the exhaust pipe, the defect of low efficiency of cyclone dust collector in treating fine dust is compensated. The internal cyclonic airflow rises and flows through the filter cartridge, filtering out micron-sized dust, thereby achieving the special removal of coarse dust and fine dust.

[0021] 3) The swirl rod is located in the middle of the horizontal cyclone separator, so that the airflow entering from the exhaust pipe can rotate, so that the dust can be better separated.

[0022] 4) Through the uneven structure of the return pipe and the setting of the internal spray pipe, the dust airflow rotating out of the horizontal cyclone separation device is fully bonded, expanded and accelerated, and better enters the vertical cyclone separation device for re-separation, forming a circulating cyclone dust removal system, further realizing the removal of coarse dust and fine dust, and improving the dust removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached picture:

[0024] Figure 1 It is a schematic diagram of the circulating dust removal equipment in the embodiment;

[0025] Figure 2 It is a schematic diagram of the hedging inertial separation device in the embodiment;

[0026] Figure 3 Schematic diagram of a dust collecting device in an embodiment;

[0027] Figure 4 It is a schematic diagram of a vertical cyclone separation device in an embodiment;

[0028] Figure 5 It is a schematic diagram of a horizontal cyclone separation device in an embodiment;

[0029] Figure 6 This is a schematic diagram of a power device in an embodiment;

[0030] Figure 7 It is a schematic diagram of the connection between the vertical cyclone separation device and the horizontal cyclone separation device in the embodiment;

[0031] Figure 8 This is a diagram showing the internal structure of the circulating dust removal equipment in the embodiment;

[0032] Fig. 9 for Figure 8Enlarged view of point A in the middle;

[0033] Fig.10 Schematic diagram of the spray pipe in the embodiment;

[0034] The components represented by the reference numerals in the figure are:

[0035] 1. Counter-inertial separation device; 101. Lower air inlet; 102. Upper air inlet; 103. Air inlet pipe; 104. Lower flush pipe; 105. Side baffle; 106. Middle baffle; 2. Dust collection device; 201. Air outlet cylinder; 202. Clean air cylinder; 203. Buffer cylinder; 204. First dust collection cylinder; 3. Vertical cyclone separation device; 301. Venturi tube; 302. Conical cylinder; 303. Second dust collection cylinder; 304. Exhaust Tube; 305, filter cartridge; 4, horizontal cyclone separation device; 401, cyclone tube; 402, swirl rod; 403, air outlet pipe; 404, return pipe; 4041, spray pipe; 4042, spoiler; 4043, spoiler block; 40431, second side; 40432, third side; 5, power unit; 501, air outlet pipe; 502, exhaust fan; 503, flange; 504, fastening screws; 505, support column. DETAILED DESCRIPTION

[0036] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0037] Example

[0038] Combination Figures 1 to 10 This embodiment first provides a tunnel high-efficiency combined circulation dust removal device, including a dust collecting device 2 and a vertical cyclone separation device 3 connected to each other, wherein the dust collecting device 2 is further provided with a counter-inertial separation device 1, and the vertical cyclone separation device 3 is further connected with a horizontal cyclone separation device 4 above, and a power device 5 is connected to one side of the horizontal cyclone separation device 4. The structure of the circulation dust removal device (the above-mentioned tunnel high-efficiency combined circulation dust removal device) is described in detail below.

[0039] In this embodiment, the dust collecting device 2 includes a dust collecting cylinder connected to the vertical cyclone separation device 3, and the dust collecting cylinder includes a clean air cylinder 202. The lower end of the clean air cylinder 202 is connected to a funnel-shaped buffer cylinder 203, and a first dust collecting cylinder 204 is also connected below the buffer cylinder 203. The setting of the buffer cylinder 203 can prevent the dust that falls through the baffle from being lifted up again by the rising airflow.

[0040] Furthermore, the upper end of the clean air cylinder 202 is connected to a truncated cone-shaped air outlet cylinder 201, and the upper end of the air outlet cylinder 201 is connected to the separation cylinder. The truncated cone-shaped air outlet cylinder 201 can prevent dust from spreading too far when it rushes against the dust collecting cylinder, and can also guide the flow of gas.

[0041] In this embodiment, the counter-inertial separation device 1 includes a dust blocking mechanism arranged inside the dust collecting tube, and the dust blocking mechanism includes a plurality of dust blocking groups arranged in an upper and lower gap. The dust blocking group includes a laterally arranged strip side baffle plate 105 and an intermediate baffle plate 106. The two ends of the side baffle plate 105 and the intermediate baffle plate 106 are fixed to the inner wall of the dust collecting tube and are arranged in an "eight" shape.

[0042] Preferably, the side baffles 105 and the middle baffles 106 are welded to the inner wall of the clean air cylinder 202, the side baffles 105 are trapezoidal thin plates, and the middle baffles 106 are rectangular baffles, which are arranged at an angle of 45° from top to bottom at equal distances, so that the dust can contact the baffles to a greater extent and be separated. The side baffles 105 and the middle baffles 106 are arranged equidistantly up and down in the dust collecting cylinder, so that the airflow flowing in from the lower punch pipe 104 passes through the middle of the dust blocking group, changing the original movement trajectory of the dust, causing it to hit the baffles and fall down.

[0043] In this embodiment, the counter-inertial separation device 1 also includes an air inlet pipe 103 that passes through the inside and outside of the dust collecting tube. A lower flush pipe 104 is vertically provided on the lower side of one end of the air inlet pipe 103 located in the dust collecting tube, and the lower end of the lower flush pipe 104 extends between the side baffle plate 105 and the middle baffle plate 106 of the uppermost dust shielding group.

[0044] As a preferred embodiment, the counter-inertial separation device 1 further comprises a U-shaped tube connected to the end of the air inlet pipe 103 away from the dust collecting cylinder, and the opening side of the U-shaped tube is arranged away from the air inlet pipe 103. The U-shaped tube is arranged vertically, and the two ends of the opening side are respectively an upper air inlet 102 and a lower air inlet 101, which facilitates the collision when the airflows intersect, changes the movement path of the dust particles, and is beneficial to the next step of inertial dust removal.

[0045] Exemplarily, the clean air duct 202 is connected to the counter-inertial separation device 1 by welding to enhance the stability of the connection and avoid gaps that may cause dust leakage.

[0046] In this embodiment, the vertical cyclone separation device 3 includes a separation cylinder which is vertically arranged and connected to the dust collecting cylinder at the upper end, and an exhaust pipe 304 which is vertically arranged at the upper end of the separation cylinder and passes through the inside and outside of the separation cylinder, and the lower end of the exhaust pipe 304 is connected to a filter cartridge 305, which can specifically remove fine dust in the tunnel.

[0047] Preferably, the upper end of the separation cylinder is connected to the dust collection cylinder through a venturi tube 301, and the diameter of the end of the venturi tube 301 connected to the dust collection cylinder is larger than the diameter of the end connected to the separation cylinder, so that the airflow coming out of the dust collection cylinder is accelerated to a certain extent, thereby better performing gas-solid separation in the vertical cyclone separation device 3.

[0048] In a specific implementation, the separation cylinder further includes a conical cylinder body 302 and a second ash collecting cylinder 303 thereunder. The arrangement of the first ash collecting cylinder 204 and the second ash collecting cylinder 303 can facilitate centralized treatment of the separated dust.

[0049] In this embodiment, the horizontal cyclone separation device 4 includes a cyclone barrel 401 which is arranged horizontally and one end of which is connected to the upper end of the exhaust pipe 304 . A swirl guide rod 402 is arranged horizontally inside the cyclone barrel 401 at a position corresponding to the exhaust pipe 304 .

[0050] Preferably, the length of the swirl rod 402 in the cyclone barrel 401 is not less than the diameter of the exhaust pipe 304, so as to avoid a small airflow rotation radius due to a too short length, thereby affecting the dust removal efficiency.

[0051] In this embodiment, a return pipe 404 is further connected between the end of the cyclone barrel 401 away from the exhaust pipe 304 and the vertical cyclone separation device 3 .

[0052] Furthermore, the diameter of the end of the return pipe 404 connected to the cyclone barrel 401 is larger than the diameter of the end connected to the separation barrel, so that the dust airflow rotating out of the cyclone barrel 401 can be accelerated when flowing out of the return pipe 404, preventing the wind speed from being too low, causing the flow to be blocked, and better entering the separation barrel to form a circulating cyclone dust removal system.

[0053] Combination Figures 8 to 10 Specifically, the reflux pipe 404 includes a conical reflux chamber that is larger at the top and smaller at the bottom. The lower end of the reflux chamber is provided with a first columnar acceleration chamber, a shuttle-shaped diffusion chamber, and a second columnar acceleration chamber in sequence. A spray pipe 4041 is vertically provided in the diffusion chamber. The spray pipe 4041 is provided with a plurality of spoilers 4042 with triangular cross sections along its length direction. The spoilers 4042 are arranged with their pointed ends facing the inner wall of the diffusion chamber. The portion of the spray pipe 4041 located between two adjacent spoilers 4042 is provided with a plurality of spray ports. The inner wall of the diffusion section is provided with a plurality of spoiler blocks 4043 with triangular cross sections. The bottom surface of the spoiler blocks 4043 is connected to the inner wall of the diffusion chamber, and the surfaces where the two waistlines are located are both arranged at obtuse angles with the inner wall of the diffusion section. The obtuse angle setting can avoid the occurrence of flow dead angles and prevent the accumulation of dust particles.

[0054] One end of the second acceleration chamber away from the diffusion chamber is connected to the venturi tube 301, and a water collecting tank is connected to the lower side of the venturi tube 301 opposite to the return pipe 404. The lower end of the spray pipe 4041 passes through the venturi tube 301 and extends into the water collecting tank.

[0055] Under the action of the spray pipe 4041, the humidity of the air in the reflux pipe 404 increases, increasing the cohesion between the gases entering the reflux pipe 404, causing small dust particles to cohere into dust particles of larger diameter, and then enter the vertical cyclone separation device 3 for circulation separation after acceleration. The airflow returning from the cyclone barrel 401 first enters the reflux chamber. The setting of the reflux chamber and the first acceleration chamber can not only provide a buffer space for the reflux gas, but also preliminarily accelerate the gas to ensure that it enters the diffusion chamber better. The speed of the gas in the shuttle diffusion chamber begins to decrease, and under the action of the spoiler block 4043, the flow trajectory of the gas becomes complex and diverse, the residence time of the gas becomes longer, and the dust adhesion time is increased.

[0056] In a specific implementation, the spoiler 4042 is staggered up and down along the length direction of the spray tube 4041, and its lower side along the length direction of the spray tube 4041 is set in an arc shape, which can not only increase the spoiler effect, promote the airflow to form a small vortex, increase the stay and contact time, but also guide the excess water mist to flow along the wall of the spray tube 4041. The outer ring of the spray tube 4041 is provided with a plurality of drainage grooves along its length direction, guiding the water mist attached to the tube wall and the excess water mist to flow along the drainage grooves to the water collecting tank below.

[0057] Exemplarily, the spoiler block 4043 includes a first side connected to the side wall of the diffusion chamber, and a second side 40431 and a third side 40432 opposite to the first side, and the angle between the second side 40431 and the first side is smaller than the angle between the third side 40432 and the first side, so as to ensure that the airflow can smoothly flow along the second side 40431 and enter the second acceleration chamber after the spoiler effect.

[0058] In this embodiment, the power device 5 includes an air outlet pipe 501 connected to the end of the cyclone 401 away from the exhaust pipe 304, and an exhaust fan 502 is provided on the air outlet pipe 501.

[0059] Specifically, an air outlet pipe 403 is provided at one end of the cyclone 401 away from the exhaust pipe 304 , a flange 503 is provided at one end of the air outlet pipe 501 , and the air outlet pipe 403 is connected to the flange 503 via a fastening screw 504 .

[0060] To further improve the stability of the structure, the power device 5 further includes a support column 505 whose two ends are respectively connected to the air outlet pipe 501 and the side wall of the venturi tube 301 , and the lower end of the support column 505 is welded to the upper side of the air inlet pipe 103 .

[0061] The power device 5 is turned on to allow the dust-containing gas from the outside to enter the equipment from the lower air inlet 101 and the upper air inlet 102 respectively. After the dust-containing air is counteracted, its speed is significantly reduced. When it passes through the lower punch pipe 104 and reaches between the side baffle 105 and the middle baffle 106, the dust collides with the dust blocking mechanism by inertia and is separated. The separated dust falls into the first dust collecting cylinder 204, and the purified airflow flows out from the air outlet cylinder 201, flows into the vertical cyclone separation device 3 through the venturi tube 301. The external cyclone separation device 3 performs centrifugal motion to separate the dust and fall into the second cyclone collection cylinder 303, and the internal cyclone rises along the central area, and after fine filtration by the filter cylinder 305, it is discharged from the exhaust. The dust is discharged from the tube 304 and enters the horizontal cyclone separation device 4, where the guide rod 402 inside helps the incoming airflow to rotate, and some dust will be deposited on the bottom side wall of the cyclone barrel 401 and enter the return pipe 404 with higher humidity. Under the action of the spoiler 4042 and the spoiler fast inside the return pipe 404, the flow trajectory of the gas becomes complex and diverse, the residence time of the airflow becomes longer, the adhesion between tiny particles increases, and they are gradually bonded into larger particles and discharged from the return pipe 404, and enter the vertical cyclone separation device 3 again for gas-solid separation, forming a repeated separation of dust in a cycle, and the purified airflow is finally discharged to the outside from the outlet pipe 501. After the dust removal is completed, the power device 5 is turned off and the dust is cleaned. The dust-laden gas undergoes multi-stage dust removal to achieve the gradual removal of dust of different particle sizes. Through the uneven structure in the return pipe 404 and the setting of the internal spray pipe 4041, the dust airflow rotating out of the horizontal cyclone separation device 4 is fully bonded, expanded and accelerated, and better enters the vertical cyclone separation device 3 for re-separation, forming a circulating cyclone dust removal system, further achieving the removal of coarse dust and fine dust and improving the dust removal efficiency.

Claims

1. A tunnel high-efficiency combined circulation dust removal equipment, characterized in that: It comprises a dust collecting device (2) and a vertical cyclone separation device (3) which are connected to each other, wherein a counter-inertial separation device (1) is also provided inside the dust collecting device (2), a horizontal cyclone separation device (4) is also connected above the vertical cyclone separation device (3), and a power device (5) is connected to one side of the horizontal cyclone separation device (4); The dust collecting device (2) comprises a dust collecting cylinder connected to the vertical cyclone separation device (3); The counter-inertial separation device (1) comprises a dust blocking mechanism arranged inside the dust collecting cylinder, the dust blocking mechanism comprises a plurality of dust blocking groups arranged in an upper and lower gap arrangement, the dust blocking groups comprise a strip-shaped side baffle plate (105) and an intermediate baffle plate (106) arranged transversely, the two ends of the side baffle plate (105) and the intermediate baffle plate (106) being fixed to the inner wall of the dust collecting cylinder and arranged in an "eight" shape; The counter-inertial separation device (1) further comprises an air inlet pipe (103) penetrating the inside and outside of the dust collecting tube, a lower flushing pipe (104) being vertically arranged at the lower side of one end of the air inlet pipe (103) located in the dust collecting tube, and the lower end of the lower flushing pipe (104) extending between the side baffle plate (105) and the middle baffle plate (106) of the uppermost dust shielding group; The vertical cyclone separation device (3) comprises a separation cylinder arranged vertically and the upper end of which is connected to the dust collecting cylinder, and an exhaust pipe (304) arranged vertically at the upper end of the separation cylinder and passing through the inside and outside of the separation cylinder, and the lower end of the exhaust pipe (304) is connected to a filter cylinder (305); The horizontal cyclone separation device (4) comprises a cyclone cylinder (401) which is arranged horizontally and one end of which is connected to the upper end of the exhaust pipe (304); a cyclone guide rod (402) is arranged horizontally inside the cyclone cylinder (401) at a position corresponding to the exhaust pipe; a return pipe (404) is also connected between the end of the cyclone cylinder (401) away from the exhaust pipe (304) and the separation cylinder; The power device (5) comprises an air outlet pipe (501) connected to an end of the cyclone (401) away from the exhaust pipe, and an exhaust fan (502) is provided on the air outlet pipe (501).

2. The tunnel high-efficiency combined circulation dust removal equipment according to claim 1 is characterized in that: The diameter of the end of the return pipe (404) connected to the cyclone cylinder (401) is larger than the diameter of the end connected to the separation cylinder.

3. The high-efficiency combined circulating dust removal equipment for tunnels according to claim 1 is characterized in that: The upper end of the separation cylinder is connected to the dust collecting cylinder through a venturi tube (301), and the diameter of the end of the venturi tube (301) connected to the dust collecting cylinder is larger than the diameter of the end connected to the separation cylinder.

4. The high-efficiency combined circulating dust removal equipment for tunnels according to claim 3 is characterized in that: The reflux pipe (404) includes a conical reflux chamber that is larger at the top and smaller at the bottom, and a columnar first acceleration chamber, a shuttle-shaped diffusion chamber, and a columnar second acceleration chamber are sequentially arranged at the lower end of the reflux chamber; A spray pipe (4041) is vertically arranged in the diffusion chamber, and a plurality of spoilers (4042) with triangular cross sections are arranged on the spray pipe (4041) along its length direction, and the spoilers (4042) are arranged with their pointed ends facing the inner wall of the diffusion chamber, and a portion of the spray pipe (4041) located between two adjacent spoilers (4042) is provided with a plurality of spray ports; A plurality of spoiler blocks (4043) with triangular cross sections are arranged on the inner wall of the diffusion section, the bottom surface of the spoiler block (4043) is connected to the inner wall of the diffusion chamber, and the surfaces where the two waistlines of the spoiler block (4043) are located are arranged at an obtuse angle to the inner wall of the diffusion section; One end of the second acceleration chamber away from the diffusion chamber is connected to the venturi tube (301), the lower side of the venturi tube (301) opposite to the return pipe (404) is connected to a water collecting tank, and the lower end of the spray pipe passes through the venturi tube (301) and extends into the water collecting tank.

5. The tunnel high-efficiency combined circulation dust removal equipment according to claim 1 is characterized in that: The counter-inertial separation device (1) further comprises a U-shaped tube which is connected to the end of the air inlet pipe (103) away from the dust collecting cylinder, and the opening side of the U-shaped tube is arranged away from the air inlet pipe (103).

6. The tunnel high-efficiency combined circulation dust removal equipment according to claim 1 is characterized in that: The dust collecting cylinder comprises a clean air cylinder (202) connected to the dust shielding group, the lower end of the clean air cylinder (202) is connected to a funnel-shaped buffer cylinder (203), and the lower part of the buffer cylinder (203) is also connected to a first dust collecting cylinder (204).

7. The tunnel high-efficiency combined circulation dust removal equipment according to claim 1 is characterized in that: The length of the cyclone rod (402) in the cyclone barrel (401) is not less than the diameter of the exhaust pipe (304).

8. The tunnel high-efficiency combined circulation dust removal equipment according to claim 3 is characterized in that: The power device (5) further comprises a support column (505) having two ends respectively connected to the air outlet pipe (501) and the side wall of the venturi tube (301).

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