A tunnel air purification device and its two-way electrostatic dust removal method

Abstract

The present invention relates to a tunnel air purification device, which can be installed behind the wind tower in the tunnel, and can ensure effective purification of the air in the tunnel regardless of whether the tunnel uses a split ventilation mode or a combined ventilation mode; the purification device pumps air through the first fan or the second fan respectively, so that the air in the tunnel passes through the dust removal component and is discharged along the same direction as the tunnel ventilation; specifically, the first fan or the second fan cooperates with the second wind blocking device or the first wind blocking device to close the corresponding air inlet, respectively realizing the connection between the first air duct or the second air duct and the driving space in the tunnel; the first air duct and the first fan therein are symmetrically arranged with the second air duct and the second fan therein, so that the air flow inhaled from the tunnel into the air purification device can be discharged back into the driving space from two directions respectively, ensuring that the direction of the air flow discharged after purification is consistent with the tunnel ventilation direction, avoiding the backflow of the purified air, and realizing the effective purification of the air in the tunnel.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification, and particularly relates to a tunnel air purification device and a two-way electrostatic dust removal method thereof. Background Art

[0002] In recent years, there have been more and more ultra-long tunnels in China. In order to control the air pollution caused by vehicle traffic in the tunnels, some tunnels are equipped with air purification systems and wind towers are set in front of the exits at the same time to extract the air in the tunnels and discharge it to the high altitude, so as to reduce the total amount of pollutants discharged at the tunnel entrances.

[0003] However, during the operation of the tunnels, in the case of vehicle congestion where air purification is most needed, the tunnels will adopt a ventilation method in a confluence mode to discharge the air in the tunnels from the wind towers, so that fresh air enters the tunnels to dilute the pollutant concentration in the tunnels. This ventilation mode will cause the air purification device that only supports one-way air intake to be unable to effectively purify the air in the tunnels. Summary of the Invention

[0004] The present invention provides a tunnel air purification device and a two-way electrostatic dust removal method thereof, which can effectively solve the problems in the background art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A tunnel air purification device and a two-way electrostatic dust removal method thereof, including: the air purification device is arranged in the ceiling space above the tunnel, and includes a hoisting frame and a first ventilation component, a dust removal component and a second ventilation component arranged in sequence along the length direction of the tunnel. The first ventilation component and the second ventilation component are symmetrically arranged on both sides of the dust removal component;

[0007] The first ventilation component includes a first air duct, a first fan and a first wind blocking device. The second ventilation component includes a second air duct, a second fan and a second wind blocking device. One ends of the first air duct and the second air duct are respectively communicated with the dust removal component. The first fan and the second fan are respectively located at one ends of the first air duct and the second air duct away from the dust removal component;

[0008] A first air inlet and a second air inlet are respectively opened on the first air duct and the second air duct, and are blocked by the first wind blocking device and the second wind blocking device respectively. The first air inlet and the second air inlet are both communicated with the driving space below the ceiling in the tunnel.

[0009] Further, the first air inlet and the second air inlet are respectively located on one sides of the first air duct and the second air duct facing the driving space of the tunnel;

[0010] The first windshield device and the second windshield device are respectively located below the first air duct and the second air duct, and both can move along the tunnel length direction.

[0011] Furthermore, the cross-sections of the first air duct and the second air duct are respectively converged towards the ends where the first fan and the second fan are provided along the tunnel length direction;

[0012] The first air inlet and the second air inlet are respectively arranged at one ends of the first air duct and the second air duct close to the dust removal assembly.

[0013] Furthermore, both the first windshield device and the second windshield device include a vehicle body, an inclined plate and a traveling wheel provided thereon. The two inclined plates are respectively arranged corresponding to the first air inlet and the second air inlet;

[0014] A guide rail is arranged at the bottom of the lifting frame. The guide rail is arranged along the tunnel length direction. The vehicle body is slidably connected to the guide rail through the traveling wheel.

[0015] Furthermore, both the first air duct and the second air duct include a top baffle, a longitudinal partition and a bottom baffle. The top baffle is connected to the bottom baffle through the two longitudinal partitions located on both sides in the tunnel length direction;

[0016] The longitudinal partition is arranged as a boot-shaped plate. The bottom baffle is partially connected to the longitudinal partition. The inclined plate cooperates with the bottom baffle to seal the bottom side of the first air duct or the second air duct.

[0017] Furthermore, a top plate, a bottom plate and two side plates are arranged on the lifting frame corresponding to the dust removal assembly. The top plate and the bottom plate are connected through the two side plates. An oil collecting pan is arranged on the bottom plate;

[0018] Fan brackets are arranged at both ends in the length direction of the lifting frame. The first fan and the second fan are respectively arranged on the two fan brackets. Particle sensors are arranged at both the first air inlet and the second air inlet. A wind speed and wind direction sensor is arranged on one side of the tunnel ceiling facing the driving space.

[0019] Furthermore, the dust removal assembly includes a dust collecting device, a first discharging device, a second discharging device and a filter screen. The first air duct and the second air duct are respectively communicated with the dust removal assembly through the filter screen. The first discharging device and the second discharging device are respectively located on both sides of the dust collecting device;

[0020] The first discharge device, the second discharge device, and the filter net are all arranged along the width direction of the hoisting frame. A plurality of dust collection devices are arranged side by side along the width direction of the hoisting frame. A spray pipeline is further arranged on one side of the filter net close to the dust collection device.

[0021] Furthermore, both the first discharge device and the second discharge device include a high-voltage horizontal support, a high-voltage discharge electrode plate, and a high-voltage pantograph arranged thereon. The high-voltage horizontal support is fixed on the bottom plate and arranged along the width direction of the hoisting frame.

[0022] The dust collection device includes a dust collection horizontal support, a dust collection plate, and a dust collection plate pantograph arranged thereon. The dust collection horizontal support is fixed on the bottom plate and arranged along the width direction of the hoisting frame.

[0023] A two-way electrostatic dust removal method uses the above tunnel air purification equipment. By controlling the opening of the first air inlet and the second fan, and cooperating with the opening of the dust removal assembly, the dust removal operation of the air in the tunnel driving space along the first ventilation direction is realized.

[0024] By controlling the opening of the second air inlet and the first fan, and cooperating with the opening of the dust removal assembly, the dust removal operation of the air in the tunnel driving space along the second ventilation direction is realized.

[0025] Among them, the first ventilation direction and the second ventilation direction are arranged in the opposite direction along the tunnel length direction.

[0026] Furthermore, during the dust removal operation in different directions, the first discharge device or the second discharge device close to the first air inlet or the second air inlet in the open state in the dust removal assembly is respectively turned on.

[0027] During the cleaning process of the dust removal assembly, the first air inlet and the second air inlet are respectively closed by the first wind blocking device and the second wind blocking device. Then, the spray pipeline is turned on to spray the cleaning agent on the dust collection device in the dust removal assembly. Finally, the second fan is turned on to make the air be inhaled from the first fan and discharged from the second fan, so as to accelerate the volatilization of the cleaning agent.

[0028] The beneficial effects of the present invention are as follows:

[0029] In this application, air is pumped respectively by the first fan or the second fan, so that the air in the tunnel passes through the dust removal assembly and is discharged along the same direction as the tunnel ventilation direction; specifically, the first fan or the second fan cooperates with the second wind blocking device or the first wind blocking device to close the corresponding air inlet, respectively realizing the connection between the first air duct or the second air duct and the driving space in the tunnel; the first air duct and the first fan therein are symmetrically arranged with the second air duct and the second fan therein, so that the air flow sucked into the air purification equipment from the tunnel can be discharged back into the driving space from two directions respectively, ensuring that the direction of the air flow discharged after purification is consistent with the tunnel ventilation direction, avoiding the backflow of the purified air, and realizing the effective purification of the air in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a side view of the overall solid layout of the tunnel air purification equipment in the ceiling space in the embodiment of the present invention;

[0032] Figure 2 It is a schematic structural diagram of the hoisting frame in the embodiment of the present invention;

[0033] Figure 3 It is a schematic structural diagram of the discharge device in the embodiment of the present invention;

[0034] Figure 4 It is a schematic structural diagram of the dust collection device in the embodiment of the present invention;

[0035] Figure 5 It is a schematic structural diagram of the semi-closed air duct in the embodiment of the present invention;

[0036] Figure 6 It is a schematic structural diagram of the wind blocking device in the embodiment of the present invention.

[0037] Reference numerals: 1, lifting frame; 11, guide rail; 12, top plate; 13, bottom plate; 14, side plate; 15, oil collecting pan; 16, fan support; 17, particulate matter sensor; 18, wind speed and direction sensor; 2, first ventilation assembly; 21, first air duct; 211, first air inlet; 212, top baffle; 213, longitudinal partition; 214, bottom baffle; 22, first fan; 23, first wind blocking device; 231, vehicle body; 232, inclined plate; 233, walking wheel; 3, dust removal assembly; 31, dust collection device; 311, dust collection transverse support; 312, dust collection plate; 313, dust collection pantograph; 32, first discharge device; 321, high-voltage transverse support; 322, high-voltage discharge electrode plate; 323, high-voltage pantograph; 33, second discharge device; 34, filter screen; 35, spray pipeline; 4, second ventilation assembly; 41, second air duct; 411, second air inlet; 42, second fan; 43, second wind blocking device. Detailed implementation manners

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0041] As Figures 1 to 6A tunnel air purification device as shown, the air purification device is arranged in the ceiling space above the tunnel, and includes a hoisting frame 1, a first ventilation component 2, a dust removal component 3, and a second ventilation component 4 arranged in sequence along the tunnel length direction. The first ventilation component 2 and the second ventilation component 4 are symmetrically arranged on both sides of the dust removal component 3; the first ventilation component 2 includes a first air duct 21, a first fan 22, and a first wind blocking device 23, and the second ventilation component 4 includes a second air duct 41, a second fan 42, and a second wind blocking device 43. One ends of the first air duct 21 and the second air duct 41 are respectively connected to the dust removal component 3, and the first fan 22 and the second fan 42 are respectively located at the ends of the first air duct 21 and the second air duct 41 far from the dust removal component 3; first air inlets 211 and second air inlets 411 are respectively opened on the first air duct 21 and the second air duct 41, and are respectively blocked by the first wind blocking device 23 and the second wind blocking device 43. Both the first air inlet 211 and the second air inlet 411 are connected to the driving space below the tunnel ceiling.

[0042] In this application, air is respectively pumped by the first fan 22 or the second fan 42, so that the air in the tunnel passes through the dust removal component 3 and is discharged from the same direction as the tunnel ventilation; specifically, the first fan 22 or the second fan 42 cooperates with the second wind blocking device 43 or the first wind blocking device 23 to close the corresponding air inlet, respectively realizing the connection between the first air duct 21 or the second air duct 41 and the driving space in the tunnel; the first air duct 21 and the first fan 22 therein are symmetrically arranged with the second air duct 41 and the second fan 42 therein, so that the air flow inhaled from the tunnel into the air purification device can be discharged back to the driving space from two directions respectively, ensuring that the direction of the air flow discharged after purification is consistent with the tunnel ventilation direction, avoiding the backflow of the purified air, and realizing the effective purification of the air in the tunnel.

[0043] As a preferred embodiment of this application, the air purification device is hoisted in the ceiling space at the top of the tunnel, and the installation space is limited. To improve the air purification efficiency, the design of the first air duct 21 and the second air duct 41 will try to occupy the ceiling space as much as possible. Therefore, the design size requirements for the wind blocking device are minimized.

[0044] As Figure 1 and Figure 5 shown in the air duct structure in the ceiling space, the first air inlets 211 and the second air inlets 411 are respectively located on the sides of the first air duct 21 and the second air duct 41 facing the tunnel driving space.

[0045] Among them, the first wind blocking device 23 and the second wind blocking device 43 are respectively located below the first air duct 21 and the second air duct 41, and both can move along the tunnel length direction.

[0046] By making full use of the height space inside the suspended ceiling to set up the first air duct 21 and the second air duct 41, the ventilation efficiency is ensured; the wind blocking devices corresponding to the air inlets on the two air ducts utilize the length dimension inside the suspended ceiling, and by driving the first wind blocking device 23 or the second wind blocking device 43 to move along the tunnel length direction respectively, the closing or opening of the first air inlet 211 or the second air inlet 411 on the first air duct 21 or the second air duct 41 is realized.

[0047] The air ducts and the wind blocking devices make full use of the internal space of the suspended ceiling, and while ensuring the air purification efficiency, the stable two-way dust removal control of the air in the tunnel is realized.

[0048] Furthermore, the cross-sections of the first air duct 21 and the second air duct 41 are respectively converged towards the ends where the first fan 22 and the second fan 42 are provided along the tunnel length direction; the first air inlet 211 and the second air inlet 411 are respectively arranged at one ends of the first air duct 21 and the second air duct 41 close to the dust removal component 3.

[0049] The converged design of the cross-section of the air duct towards the end where the fan is provided reserves sufficient space for the installation and control of the wind blocking device, and the cross-section at the air inlet of the air duct is always smaller than the cross-section at the end where the fan is provided. The converged structure of the air duct will not affect the ventilation volume and ensures the air purification efficiency.

[0050] In the above-mentioned embodiment, as Figure 5 and Figure 6 shown, both the first wind blocking device 23 and the second wind blocking device 43 include a vehicle body 231 and the inclined plates 232 and traveling wheels 233 provided thereon. The two inclined plates 232 are respectively arranged corresponding to the first air inlet 211 and the second air inlet 411. By driving the vehicle body 231 to move along the guide rail 11, the inclined plates 232 thereon are attached to the air inlets of the air ducts, so as to realize the closing of the bottom side of the air ducts.

[0051] Among them, a guide rail 11 is provided at the bottom of the hoisting frame 1, the guide rail 11 is arranged along the tunnel length direction, and the vehicle body 231 is slidably connected to the guide rail 11 through the traveling wheels 233.

[0052] Both the first air duct 21 and the second air duct 41 include a top baffle 212, a longitudinal partition 213 and a bottom baffle 214. The top baffle 212 is connected to the bottom baffle 214 through two longitudinal partitions 213 located on both sides in the tunnel length direction; the longitudinal partition 213 is arranged as a boot-shaped plate, the bottom baffle 214 is partially connected to the longitudinal partition 213, and the inclined plate 232 cooperates with the bottom baffle 214 to close the bottom side of the first air duct 21 or the second air duct 41.

[0053] The boot-shaped longitudinal partition 213 makes the air inlet at the bottom side of the air duct be arranged at a certain inclination angle. The wind shielding device moves linearly in the length direction of the tunnel. An inclined plate 232 with the same inclination angle as the air inlet is arranged on the side of the vehicle body 231 facing the air inlet, so that the inclined plate 232 can completely fit with the air inlet, realizing the closure of the bottom side of the air duct and forming a complete air duct.

[0054] In the present application, as Figure 1 and Figure 2 shown, on the hoisting frame 1, a top plate 12, a bottom plate 13 and two side plates 14 are arranged corresponding to the dust removal assembly 3. The top plate 12 and the bottom plate 13 are connected by the two side plates 14, and an oil collecting pan 15 is arranged on the bottom plate 13; at both ends of the hoisting frame 1 in the length direction, fan brackets 16 are arranged. The first fan 22 and the second fan 42 are respectively arranged on the two fan brackets 16. Particle sensors 17 are arranged at the first air inlet 211 and the second air inlet 411, and a wind speed and direction sensor 18 is arranged on the side of the tunnel ceiling facing the driving space.

[0055] In the dust removal assembly 3, further referring to Figure 3 and Figure 4 shown, the dust removal assembly 3 includes a dust collection device 31, a first discharge device 32, a second discharge device 33 and a filter screen 34. The first air duct 21 and the second air duct 41 are respectively communicated with the dust removal assembly 3 through the filter screen 34. The first discharge device 32 and the second discharge device 33 are respectively located on both sides of the dust collection device 31; the first discharge device 32, the second discharge device 33 and the filter screen 34 are all arranged along the width direction of the hoisting frame 1. A plurality of dust collection devices 31 are arranged in parallel along the width direction of the hoisting frame 1, and a spray pipeline 35 is also arranged on the side of the filter screen 34 close to the dust collection device 31.

[0056] Both the first discharge device 32 and the second discharge device 33 include a high-voltage horizontal bracket 321 and a high-voltage discharge electrode plate 322 and a high-voltage pantograph 323 arranged thereon. The high-voltage horizontal bracket 321 is fixed on the bottom plate 13 and arranged along the width direction of the hoisting frame 1; the dust collection device 31 includes a dust collection horizontal bracket 311 and a dust collection plate 312 and a dust collection plate 312 pantograph arranged thereon. The dust collection horizontal bracket 311 is fixed on the bottom plate 13 and arranged along the width direction of the hoisting frame 1.

[0057] Wherein, the width and height dimensions of the filter screen 34 are both adapted to the discharge device and the dust collection device 31. The oil collecting pan 15 can cover all the space below the dust collection device 31. The hoisting frame 1 is fixedly connected to the tunnel top, and the length of the connecting rod at the connection between the hoisting frame 1 and the tunnel top is adjustable.

[0058] The present application further discloses a two-way electrostatic dust removal method for the application of the above air purification equipment in a tunnel. By controlling the opening of the first air inlet 211 and the start of the second fan 42, and cooperating with the start of the dust removal assembly 3, the dust removal operation of the air in the tunnel driving space along the first ventilation direction is realized; by controlling the opening of the second air inlet 411 and the start of the first fan 22, and cooperating with the start of the dust removal assembly 3, the dust removal operation of the air in the tunnel driving space along the second ventilation direction is realized; wherein, the first ventilation direction and the second ventilation direction are arranged in the opposite direction along the tunnel length direction.

[0059] In the specific implementation process, if the ventilation direction during the tunnel operation is the same as the above first ventilation direction, the first wind deflector 23 is driven away from the first air inlet 211, and the second wind deflector 43 abuts against the second air inlet 411, so that the first air duct 21 is opened and the second air duct 41 is closed; while the second fan 42 is exhausting air, the first discharge device 32 is energized, the dust collection device 31 is energized, and the second discharge mechanism is not energized. The air in the tunnel flows in from the first air inlet 211 of the first air duct 21, sequentially passes through the filter screen 34, the first discharge device 32, the dust collection device 31, the second discharge device 33 and the filter screen 34, then enters the second air duct 41, and finally is discharged from the second fan 42 in the second air duct 41.

[0060] The air in the tunnel is ionized at the first discharge device 32, so that the particulate matter in the air is charged, and the charged particulate matter in the air is adsorbed to the outer surface of the dust collection plate 312 under the action of the Coulomb force of electrostatic adsorption at the dust collection device 31.

[0061] If the ventilation direction during the tunnel operation is the same as the above second ventilation direction, the second wind deflector 43 is driven away from the second air inlet 411, and the first wind deflector 23 abuts against the first air inlet 211, so that the second air duct 41 is opened and the first air duct 21 is closed; while the first fan 22 is exhausting air, the second discharge device 33 is energized, the dust collection device 31 is energized, and the first discharge mechanism is not energized. The air in the tunnel flows in from the second air inlet 411 of the second air duct 41, sequentially passes through the filter screen 34, the second discharge device 33, the dust collection device 31, the first discharge device 32 and the filter screen 34, then enters the first air duct 21, and finally is discharged from the first fan 22 in the first air duct 21.

[0062] During the cleaning process of the dust collection device 31, when there are fewer passing vehicles during tunnel operation, there is no need for the air purification equipment to work; drive the first windscreen device 23 and the second windscreen device 43 to abut against the first air inlet 211 and the second air inlet 411 respectively, that is, the two air ducts are not connected to the driving space in the tunnel, preventing the cleaning liquid sprayed from the spray pipe 35 during the cleaning process from splashing out and affecting the driving space below. At this time, the first discharge device 32, the second discharge device 33, the dust collection device 31, the first fan 22 and the second fan 42 are all powered off, and the spray pipe 35 is opened to spray the cleaning liquid on the dust collection device 31 to clean the particulate matter on the surface of the dust collection plate 312. The particulate matter flows to the oil sump 15 together with the cleaning liquid. After the cleaning is completed, the second fan 42 is turned on to suck air from the first fan 22 and discharge it from the second fan 42, so as to accelerate the volatilization of the residual cleaning agent on the surfaces of the two discharge devices and the dust collection device 31 by ventilation.

[0063] Compared with the prior art, the two-way electrostatic dust removal equipment suitable for tunnel air purification proposed by the present invention can be installed behind the air tower in the tunnel, which can ensure that the air in the tunnel can be effectively purified whether the tunnel uses the split ventilation mode or the combined ventilation mode.

[0064] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tunnel air purification device, characterized in that, The air purification equipment is arranged in the ceiling space above the tunnel, and includes a hoisting frame (1), a first ventilation component (2), a dust removal component (3), and a second ventilation component (4) arranged in sequence along the length direction of the tunnel. The first ventilation component (2) and the second ventilation component (4) are symmetrically arranged on both sides of the dust removal component (3); The first ventilation component (2) includes a first air duct (21), a first fan (22), and a first wind blocking device (23). The second ventilation component (4) includes a second air duct (41), a second fan (42), and a second wind blocking device (43). One ends of the first air duct (21) and the second air duct (41) are respectively communicated with the dust removal component (3), and the first fan (22) and the second fan (42) are respectively located at the ends of the first air duct (21) and the second air duct (41) far from the dust removal component (3); A first air inlet (211) and a second air inlet (411) are respectively formed in the first air duct (21) and the second air duct (41), and are respectively blocked by the first wind blocking device (23) and the second wind blocking device (43). Both the first air inlet (211) and the second air inlet (411) are communicated with the driving space below the ceiling in the tunnel.

2. The tunnel air purification equipment according to claim 1, characterized in that, The first air inlet (211) and the second air inlet (411) are respectively located on the sides of the first air duct (21) and the second air duct (41) facing the driving space of the tunnel; The first wind blocking device (23) and the second wind blocking device (43) are respectively located below the first air duct (21) and the second air duct (41), and both can move along the length direction of the tunnel.

3. The tunnel air purification device according to claim 2, characterized in that, The cross-sections of the first air duct (21) and the second air duct (41) are respectively converged towards the ends where the first fan (22) and the second fan (42) are arranged along the length direction of the tunnel; The first air inlet (211) and the second air inlet (411) are respectively arranged at the ends of the first air duct (21) and the second air duct (41) close to the dust removal component (3).

4. The tunnel air purification device according to claim 3, characterized in that, Both the first wind blocking device (23) and the second wind blocking device (43) include a vehicle body (231), an inclined plate (232), and a traveling wheel (233) arranged thereon. The two inclined plates (232) are respectively arranged corresponding to the first air inlet (211) and the second air inlet (411); A guide rail (11) is arranged at the bottom of the hoisting frame (1). The guide rail (11) is arranged along the length direction of the tunnel, and the vehicle body (231) is slidably connected to the guide rail (11) through the traveling wheel (233).

5. The tunnel air purification device according to claim 4, characterized in that, Both the first air duct (21) and the second air duct (41) include a top baffle (212), a longitudinal partition (213), and a bottom baffle (214). The top baffle (212) is connected to the bottom baffle (214) through the two longitudinal partitions (213) located on both sides in the length direction of the tunnel; The longitudinal partition plate (213) is arranged as a boot-shaped plate. The bottom baffle (214) is partially connected to the longitudinal partition plate (213). The inclined plate (232) cooperates with the bottom baffle (214) to seal the bottom side of the first air duct (21) or the second air duct (41).

6. The tunnel air purification equipment according to claim 1, characterized in that On the hoisting frame (1), a top plate (12), a bottom plate (13) and two side plates (14) are arranged corresponding to the dust removal assembly (3). The top plate (12) and the bottom plate (13) are connected by the two side plates (14). An oil collecting pan (15) is arranged on the bottom plate (13). At both ends of the hoisting frame (1) in the length direction, fan brackets (16) are arranged. The first fan (22) and the second fan (42) are respectively arranged on the two fan brackets (16). Particle sensors (17) are arranged at the first air inlet (211) and the second air inlet (411). A wind speed and wind direction sensor (18) is arranged on one side of the tunnel ceiling facing the driving space.

7. The tunnel air purification device according to claim 6, characterized in that, The dust removal assembly (3) includes a dust collecting device (31), a first discharge device (32), a second discharge device (33) and a filter screen (34). The first air duct (21) and the second air duct (41) are respectively communicated with the dust removal assembly (3) through the filter screen (34). The first discharge device (32) and the second discharge device (33) are respectively located on both sides of the dust collecting device (31). The first discharge device (32), the second discharge device (33) and the filter screen (34) are all arranged along the width direction of the hoisting frame (1). A plurality of dust collecting devices (31) are arranged in parallel along the width direction of the hoisting frame (1). A spray pipeline (35) is further arranged on one side of the filter screen (34) close to the dust collecting device (31).

8. The tunnel air purification device according to claim 7, characterized in that, The first discharge device (32) and the second discharge device (33) both include a high-voltage horizontal bracket (321), a high-voltage discharge electrode plate (322) and a high-voltage pantograph (323) arranged thereon. The high-voltage horizontal bracket (321) is fixed on the bottom plate (13) and arranged along the width direction of the hoisting frame (1). The dust collecting device (31) includes a dust collecting horizontal bracket (311), a dust collecting plate (312) and a pantograph of the dust collecting plate (312) arranged thereon. The dust collecting horizontal bracket (311) is fixed on the bottom plate (13) and arranged along the width direction of the hoisting frame (1).

9. A two-way electrostatic dust removal method, characterized in that, Adopting the tunnel air purification equipment according to any one of the above claims 1 to 8, by controlling the opening of the first air inlet (211) and the start of the second fan (42), and cooperating with the start of the dust removal assembly (3), the dust removal operation of the air in the tunnel driving space along the first ventilation direction is realized. By controlling the opening of the second air inlet (411) and the start of the first fan (22), and cooperating with the start of the dust removal assembly (3), the dust removal operation of the air in the tunnel driving space along the second ventilation direction is realized. Wherein, the first ventilation direction and the second ventilation direction are arranged in the opposite direction in the tunnel length direction.

10. The bidirectional electrostatic dust removal method according to claim 9, characterized in that, During the dust removal operation in different directions, the first discharge device (32) or the second discharge device (33) close to the first air inlet (211) or the second air inlet (411) in the open state in the dust removal assembly (3) is respectively turned on; During the cleaning process of the dust removal assembly (3), the first air inlet (211) and the second air inlet (411) are respectively closed by the first wind blocking device (23) and the second wind blocking device (43), then the spray pipe (35) is turned on to spray the cleaning agent on the dust collection device (31) in the dust removal assembly (3), and finally the second fan (42) is turned on to make the air be inhaled from the first fan (22) and discharged from the second fan (42), so as to accelerate the volatilization of the cleaning agent.

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