Integrated tunnel purification device with ventilation and air purification cooling functions

Abstract

The integrated tunnel purification device with the ventilation and air purification cooling functions comprises an integrated shell, a jet fan, a primary filter, an electrostatic dust collector, an NO2 filter and a water curtain, the integrated shell is of a shell structure with the two ends open, the air inlet end of the jet fan is connected with the air outlet open end of the integrated shell, and the primary filter is connected with the primary filter. The primary filter, the electrostatic dust collector, the NO2 filter and the water curtain are sequentially arranged in the integrated shell in the airflow direction of the jet fan, and air in a tunnel enters the integrated shell through the air inlet opening end of the integrated shell and sequentially flows through the primary filter, the electrostatic dust collector, the NO2 filter and the water curtain to be purified and cooled. And the purified and cooled airflow flows back into the tunnel through the jet fan. The device has multiple functions of ventilation, purification and cooling, the pollutant concentration and the air temperature in the tunnel can be effectively reduced, and the problems of water drop suspension and road surface water accumulation caused by a spraying cooling mode can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel air purification, and in particular to an integrated tunnel purification device with ventilation and air purification and cooling functions. Background Art

[0002] During the operation of highway tunnels, cars will emit a large amount of pollutants and heat, such as CO, NO2, particulate matter, etc. As pollutants and temperature accumulate, the concentration and temperature of pollutants in the tunnel gradually increase, which will endanger the health of drivers and passengers and driving safety. Therefore, reducing the concentration and temperature of pollutants in the tunnel is an issue that must be considered during the tunnel design and operation stages. In the prior art, the conventional method of reducing the concentration and temperature of pollutants in the tunnel is to dilute the concentration of pollutants in the tunnel and reduce the temperature through tunnel ventilation. However, especially for extra-long tunnels and occasions where the installation of ventilation shafts is limited, the limited ventilation volume makes it difficult to effectively reduce the concentration of pollutants in the tunnel and the air temperature. At the same time, the tunnel spray cooling in the prior art easily causes a large number of water droplets to suspend in the tunnel, seriously affecting the driver's line of sight, and easily causing water accumulation on the road surface in the tunnel, which not only wastes water resources, but also endangers driving safety. Utility Model Content

[0003] The present application provides an integrated tunnel purification device with ventilation and air purification and cooling functions. It has multiple functions of ventilation, purification and cooling, which can effectively reduce the pollutant concentration and air temperature in the tunnel, and can effectively avoid the problems of water droplet suspension and road surface water accumulation caused by spray cooling.

[0004] According to an embodiment of the present application, an integrated tunnel purification device with ventilation and air purification and cooling functions is provided, the integrated tunnel purification device comprising: an integrated housing, a jet fan, a primary filter, an electrostatic precipitator, a NO2 filter and a water curtain;

[0005] The integrated shell is a shell structure with openings at both ends. The air inlet end of the jet fan is connected to the air outlet opening end of the integrated shell. The primary filter, the electrostatic precipitator, the NO2 filter and the water curtain are arranged in sequence in the integrated shell along the air flow direction of the jet fan. The air in the tunnel enters the integrated shell through the air inlet opening end of the integrated shell, and flows through the primary filter, the electrostatic precipitator, the NO2 filter and the water curtain in sequence for purification and cooling. The purified and cooled airflow flows back to the tunnel through the jet fan.

[0006] In some embodiments of the present application, the water curtain includes a water inlet pipe, a nozzle, a curtain-type filler, a water collecting tray, a drain pipe and a water tank, one end of the water inlet pipe is connected to the water tank, and the other end of the water inlet pipe is connected to the nozzle, the nozzle is arranged on the inner surface of the integrated shell away from the ground, and the spraying direction of the nozzle is toward the ground, the curtain-type filler is arranged in the integrated shell, and is located directly below the nozzle in a direction perpendicular to the ground, the water collecting tray is arranged on the inner surface of the integrated shell close to the ground, and the water collecting tray is located directly below the curtain-type filler in a direction perpendicular to the ground, and one end of the drain pipe is connected to the water collecting tray.

[0007] In some embodiments of the present application, the water curtain further includes a water valve, which is disposed on the water inlet pipe and is used to control the spray water flow rate of the nozzle.

[0008] In some embodiments of the present application, the water valve is a solenoid valve.

[0009] In some embodiments of the present application, the water curtain further includes a water filter, a water inlet of the water filter is connected to the other end of the drain pipe, and a water outlet of the water filter is connected to the water tank.

[0010] In some embodiments of the present application, the water curtain further includes a water supply pipe, and the water supply pipe is connected to the water tank.

[0011] In some embodiments of the present application, the water curtain also includes a front water baffle and a rear water baffle, one end of the front water baffle and the rear water baffle are both arranged on the inner surface of the integrated shell away from the ground, the other end of the front water baffle and the rear water baffle are set at a height lower than the setting height of one end of the curtain-type filler close to the ground, and the front water baffle is located between the curtain-type filler and the NO2 filter, and the rear water baffle is located between the curtain-type filler and the jet fan.

[0012] In some embodiments of the present application, the front water baffle and the rear water baffle are made of one of stainless steel, galvanized sheet or PVC (Polyvinyl chloride).

[0013] In some embodiments of the present application, the integrated shell includes a shell main body and a tapered tube portion, and the shell main body and the tapered tube portion are both shell structures with openings at both ends, one open end of the tapered tube portion is connected to an open end of the shell main body, and the other open end of the tapered tube portion is connected to the air inlet end of the jet fan.

[0014] In some embodiments of the present application, the vertical cross-section of the shell main body is rectangular, one open end of the tapered tube portion is rectangular, and the shape and size of the one open end of the tapered tube portion are the same as the shape and size of the vertical cross-section of the shell main body, the vertical cross-section of the shell at the air inlet end of the jet fan is circular, the other open end of the tapered tube portion is circular, and the shape and size of the other open end of the tapered tube portion are the same as the shape and size of the vertical cross-section of the shell at the air inlet end of the jet fan.

[0015] In some embodiments of the present application, the electrostatic precipitator and the water curtain both use independent controllers, and the working modes of the integrated tunnel purification device include: ventilation-denitrification working mode, ventilation-denitrification-dust removal working mode, ventilation-denitrification-cooling working mode, and ventilation-denitrification-dust removal-cooling working mode.

[0016] The beneficial effects of the embodiments of the present application are as follows:

[0017] The integrated tunnel purification device can be flexibly arranged in the tunnel to better adapt to the scenario where the pollutant concentration in the tunnel is too high or the location that is prone to exceeding the standard cannot be arranged with a shaft or a large purification station. The integrated tunnel purification device adopts a water curtain cooling method, which can avoid the problems of water droplet suspension and road surface water accumulation caused by the spray cooling method, and because water or other refrigerants flow in the water curtain, there is no loss of water or other refrigerants, and recycling is more energy-efficient. At the same time, the integrated tunnel purification device only uses one set of power fans, which effectively reduces the equipment investment cost. In addition, the integrated tunnel purification device can flexibly switch the modes of particle purification and cooling functions according to the particle concentration and air temperature level in the tunnel, avoiding the operation of electrostatic precipitators and water curtains when the particle concentration and air temperature are low, thereby effectively saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of an integrated tunnel purification device with ventilation and air purification and cooling functions provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a water curtain in an integrated tunnel purification device with ventilation and air purification and cooling functions provided in an embodiment of the present application;

[0021] Figure 3A schematic diagram of water circulation of a water curtain in an integrated tunnel purification device with ventilation and air purification and cooling functions provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structural arrangement of an integrated tunnel purification device with ventilation and air purification and cooling functions provided in an embodiment of the present application, applied in a tunnel, wherein (a) is a top view of the structural arrangement, and (b) is a side view of the structural arrangement;

[0023] Explanation of the accompanying drawings: 1 is an integrated shell, 11 is a shell body, 12 is a tapered tube, 2 is a jet fan, 3 is a primary filter, 4 is an electrostatic precipitator, 5 is a NO2 filter, 6 is a water curtain, 61 is a water inlet pipe, 62 is a nozzle, 63 is a curtain filler, 64 is a water collecting tray, 65 is a drain pipe, 66 is a water tank, 67 is a water valve, 68 is a water filter, 69 is a water supply pipe, 610 is a front water baffle, 611 is a rear water baffle, 100 is an integrated tunnel purification device, 200 is a tunnel, 300 is an external jet fan, and 400 is a vehicle. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0025] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present application and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a series of structures are included, which is not limited to the listed structures, but may optionally include structures not listed, or may optionally include other components inherent to these structures.

[0026] The embodiment of the present application discloses an integrated tunnel purification device with ventilation and air purification and cooling functions, which has multiple functions of ventilation, purification and cooling, can effectively reduce the concentration of pollutants and air temperature in the tunnel, and can effectively avoid the problems of water droplet suspension and road surface water accumulation caused by the spray cooling method. The following are detailed descriptions.

[0027] Figure 1 An integrated tunnel purification device with ventilation and air purification and cooling functions provided according to an embodiment of the present application is shown. Figure 1As shown, the integrated tunnel purification device includes: an integrated housing 1, a jet fan 2, a primary filter 3, an electrostatic precipitator 4, a NO2 filter 5 and a water curtain 6. Specifically, the integrated housing 1 is a shell structure with openings at both ends, one opening end of which is an air inlet opening end, and the other opening end is an air outlet opening end. The integrated housing 1 provides an installation and fixing position for other components of the integrated tunnel purification device. The air inlet end of the jet fan 2 is connected to the air outlet opening end of the integrated housing 1, and the primary filter 3, the electrostatic precipitator 4, the NO2 filter 5 and the water curtain 6 are arranged in sequence along the air flow direction of the jet fan 2 in the integrated housing 1, wherein the jet fan 2 is used to provide tunnel ventilation power on the one hand, and to overcome the ventilation resistance of the primary filter 3, the electrostatic precipitator 4, the NO2 filter 5 and the water curtain 6 on the other hand. The primary filter 3 is used to filter large-size particles in the air in the tunnel, the electrostatic precipitator 4 is used to filter small-size particles in the air in the tunnel, the NO2 filter 5 is used to filter NO2 gas in the air in the tunnel, and the water curtain 6 is used to reduce the air temperature in the tunnel. After the primary filter 3 first filters out larger particles, it helps to improve the efficiency of the electrostatic precipitator 4 in removing small particles. After the primary filter 3 and the electrostatic precipitator 4 remove the particles in the air in the tunnel, it helps to improve the purification efficiency of the NO2 filter 5, and also helps to improve the heat exchange efficiency between the air in the tunnel and the water curtain 6. The air in the tunnel enters the integrated housing 1 through the air inlet opening of the integrated housing 1, and flows through the primary filter 3, the electrostatic precipitator 4, the NO2 filter 5 and the water curtain 6 in sequence for purification and cooling. The purified and cooled airflow flows back to the tunnel through the jet fan 2.

[0028] In some embodiments, Figure 1 , Figure 2 and Figure 3As shown, the water curtain 6 includes a water inlet pipe 61, a nozzle 62, a curtain filler 63, a water collecting tray 64, a drain pipe 65 and a water tank 66. In detail, the water tank 66 is used to store water for air cooling. One end of the water inlet pipe 61 is connected to the water tank 66, and the other end of the water inlet pipe 61 is connected to the nozzle 62. The water in the water tank 66 is transported to the nozzle 62 through the water inlet pipe 61. The nozzle 62 is arranged on the inner surface of the integrated housing 1 away from the ground, and the spraying direction of the nozzle 62 is toward the ground. The curtain filler 63 is arranged in the integrated housing 1, and the curtain filler 63 is located directly below the nozzle 62 in a direction perpendicular to the ground. The nozzle 62 sprays the air cooling water into the curtain filler 63. The curtain filler 63 increases the contact area between the air cooling water and the airflow to achieve rapid cooling. The water collecting pan 64 is used to collect water after heat exchange. It is arranged on the inner surface of the integrated housing 1 close to the ground, and the water collecting pan 64 is located directly below the curtain filler 63 in a direction perpendicular to the ground. The water in the curtain filler 63 exchanges heat with the airflow, and at the same time, it eventually flows downward into the water collecting pan 64 under the action of gravity. In order to prevent the accumulated water in the water collecting pan 64 from leaking out, one end of the drain pipe 65 is connected to the water collecting pan 64, and the water in the water collecting pan 64 is discharged in time through the drain pipe 65.

[0029] Further, such as Figure 2 and Figure 3 As shown, the water curtain 6 also includes a water valve 67, which is arranged on the water inlet pipe 61 and is used to control the spray water flow of the nozzle 62, that is, to control the water flow in the curtain filler 63 for heat exchange with the airflow, and then to control the cooling degree of the tunnel air by controlling the water flow for heat exchange with the airflow. In the specific implementation process, the water valve 67 can be a solenoid valve to achieve automatic control.

[0030] Further, such as Figure 2 and Figure 3 As shown, the water curtain 6 also includes a water filter 68 and a water supply pipe 69. Among them, the water inlet of the water filter 68 is connected to the other end of the drain pipe 65, and the water outlet of the water filter 68 is connected to the water tank 66. The water filter 68 is used to filter the water in the water collection tray 64 and re-transport the filtered water to the water tank 66 to achieve water recycling and effectively save energy consumption. The water supply pipe 69 is connected to the water tank 66 through the water filter 68, and is used to replenish water in time when the water in the water tank 66 is insufficient. In this embodiment, the water entering the water tank 66 is filtered by the water filter 68, which can effectively ensure the purity of the water in the water tank 66 and the water used by the water curtain 6, avoid damage to the water tank 66 and the water curtain 6 due to impurities in the water, and improve the service life of the water tank 66 and the water curtain 6. It should be noted that the cooling material of the water curtain 6 can not only be water, but also other refrigerants, and this application does not limit this.

[0031] In other embodiments, Figure 1 and Figure 2 As shown, the water curtain 6 also includes a front water baffle 610 and a rear water baffle 611. In detail, one end of the front water baffle 610 and the rear water baffle 611 are both arranged on the inner surface of the integrated housing 1 away from the ground, and the setting height of the other end of the front water baffle 610 and the rear water baffle 611 is lower than the setting height of the end of the curtain filler 63 close to the ground, and the front water baffle 610 is located between the curtain filler 63 and the NO2 filter 5, and the front water baffle 610 is used to prevent water droplets in the air from entering the NO2 filter 5, and the rear water baffle 611 is located between the curtain filler 63 and the jet fan 2, and the rear water baffle 611 is used to prevent water droplets in the air from entering the jet fan 2. Further, the setting height of the other end of the front water baffle 610 and the rear water baffle 611 is lower than the setting height of the opening end of the water collecting tray 64 away from the ground, so as to further improve the blocking effect of the front water baffle 610 and the rear water baffle 611. In the specific implementation process, the material of the front water baffle 610 and the rear water baffle 611 is metal or plastic, such as stainless steel, galvanized plate or PVC material, etc. This application does not impose any restrictions on this, but it must meet the requirements of corrosion resistance and durability to better adapt to the tunnel environment.

[0032] In other embodiments, Figure 1 As shown, the integrated housing 1 includes a housing body 11 and a tapered tube 12. In detail, the housing body 11 is a straight cylindrical shell structure with openings at both ends and the same cross-section, and the tapered tube 12 is a tapered shell structure with openings at both ends and a gradually changing cross-section. The primary filter 3, the electrostatic precipitator 4, the NO2 filter 5 and the water curtain 6 are sequentially installed in the housing body 11. Since the cross-sectional size of the housing body 11 is quite different from that of the jet fan 2, the connection between the housing body 11 and the jet fan 2 is realized through the tapered tube 12. One open end of the tapered tube 12 is connected to one open end of the housing body 11, and the other open end of the tapered tube 12 is connected to the air inlet end of the jet fan 2, which plays a role in guiding flow. In the specific implementation process, the vertical cross-section of the shell main body 11 is rectangular, one open end of the tapered tube portion 12 is rectangular, and the shape and size of one open end of the tapered tube portion 12 are the same as the shape and size of the vertical cross-section of the shell main body 11, the vertical cross-section of the shell at the air inlet end of the jet fan 2 is circular, and the other open end of the tapered tube portion 12 is circular, and the shape and size of the other open end of the tapered tube portion 12 are the same as the shape and size of the vertical cross-section of the shell at the air inlet end of the jet fan 2.

[0033] The above is an introduction to the various components of the integrated tunnel purification device with ventilation and air purification and cooling functions provided in this embodiment and the connection relationship between them. Figure 1 – Figure 4 , the working principle of the integrated tunnel purification device with ventilation and air purification and cooling functions is described in detail.

[0034] In this embodiment, if Figure 4 As shown, the integrated tunnel purification device 100 can be arranged on the top, side wall, road surface or rescue lane of the tunnel 200, and the sizes of the integrated housing 1, jet fan 2, primary filter 3, electrostatic precipitator 4, NO2 filter 5 and water curtain 6 can be designed accordingly according to the actual available space in the tunnel 200, so as to facilitate the flexible arrangement of the integrated tunnel purification device 100 in the tunnel 200. It should be noted that when arranging the integrated tunnel purification device 100, the airflow direction of the jet fan 2 is the same as the driving direction of the vehicle 400 traveling in the tunnel 200. In addition, in order to further improve the ventilation capacity of the tunnel 200, a plurality of external jet fans 300 can be arranged respectively before and after the integrated tunnel purification device 100, and the specific number of the external jet fans 300 can be set according to the size of the tunnel 200.

[0035] During the operation phase of the tunnel 200, first, the control switch of the jet fan 2 of the integrated tunnel purification device 100 is turned on, and the jet fan 2 is rotated to provide power. Under the action of the rotation of the blades of the jet fan 2, the polluted air in the tunnel 200 enters from the air inlet opening end of the body shell 1, and the polluted air first passes through the primary filter 3. The filter screen of the primary filter 3 blocks the large particles in the polluted gas. The small particles and other pollutants in the polluted gas enter the electrostatic precipitator 4 after passing through the primary filter 3. The small particles in the polluted gas are separated from the polluted gas in the electrostatic precipitator 4, such as PM2.5, PM10, etc. After that, NO2 in the polluted gas is removed under the adsorption of activated carbon by the NO2 filter 5, thereby completing the filtering and purification of the polluted gas. The treated gas enters the water curtain 6, exchanges heat with the water sprayed from the water curtain 6 to the curtain filler 63, and the gas temperature is reduced. Then, the gas enters the jet fan 2 through the tapered pipe portion 12, and finally forms a high-speed airflow at the air outlet end of the jet fan 2 and blows out.

[0036] In addition, both the electrostatic precipitator 4 and the water curtain 6 use independent controllers, and the working modes of the integrated tunnel purification device 100 include: ventilation-denitrification working mode, ventilation-denitrification-dust removal working mode, ventilation-denitrification-cooling working mode, ventilation-denitrification-dust removal-cooling working mode. That is, the opening of the water valve 67 of the water curtain 6 in the integrated tunnel purification device 100 can be adjusted independently to control the air temperature in the tunnel 200. Similarly, the power supply system of the electrostatic precipitator 4 can also be independently controlled to control whether the dust removal function of the integrated tunnel purification device 100 is turned on. Based on this, the integrated tunnel purification device 100 can realize the switching of multiple working modes by controlling the opening of the water valve 67 and the switch of the electrostatic precipitator 4, including the switching of ventilation-denitrification working mode, ventilation-denitrification-dust removal working mode, ventilation-denitrification-cooling working mode, and ventilation-denitrification-dust removal-cooling working mode.

[0037] In summary, the present application discloses an integrated tunnel purification device with ventilation and air purification and cooling functions, which can be flexibly arranged in the tunnel, so as to better adapt to the scene where the pollutant concentration in the tunnel is too high or the location that is easy to exceed the standard cannot arrange the shaft or large purification station. The integrated tunnel purification device adopts a water curtain cooling method, which can avoid the problems of water droplet suspension and road surface water accumulation caused by the spray cooling method, and because water or other refrigerants flow in the water curtain, there is no loss of water or other refrigerants, and recycling is more energy-saving. At the same time, the integrated tunnel purification device only uses a set of power fans, which effectively reduces the equipment investment cost. In addition, the integrated tunnel purification device can flexibly switch the mode of particulate matter purification and cooling functions according to the particulate matter concentration and air temperature level in the tunnel, avoiding the operation of electrostatic precipitators and water curtains when the particulate matter concentration and air temperature are low, thereby effectively saving energy consumption.

[0038] Those skilled in the art will understand that the drawings are only schematic diagrams of an embodiment, and the components in the drawings are not necessarily necessary for implementing the present invention. It should also be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0040] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above-mentioned embodiments, ordinary technicians in this field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above-mentioned embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope described in the claims.

Claims

1. An integrated tunnel purification device with ventilation and air purification and cooling functions, characterized in that: The integrated tunnel purification device comprises: an integrated housing, a jet fan, a primary filter, an electrostatic precipitator, a NO2 filter and a water curtain; The integrated shell is a shell structure with openings at both ends. The air inlet end of the jet fan is connected to the air outlet opening end of the integrated shell. The primary filter, the electrostatic precipitator, the NO2 filter and the water curtain are arranged in sequence in the integrated shell along the air flow direction of the jet fan. The air in the tunnel enters the integrated shell through the air inlet opening end of the integrated shell, and flows through the primary filter, the electrostatic precipitator, the NO2 filter and the water curtain in sequence for purification and cooling. The purified and cooled airflow flows back to the tunnel through the jet fan.

2. The integrated tunnel purification device with ventilation and air purification and cooling functions according to claim 1 is characterized in that: The water curtain includes a water inlet pipe, a nozzle, a curtain-type filler, a water collecting tray, a drain pipe and a water tank, one end of the water inlet pipe is connected to the water tank, and the other end of the water inlet pipe is connected to the nozzle, the nozzle is arranged on the inner surface of the integrated shell away from the ground, and the spraying direction of the nozzle is toward the ground, the curtain-type filler is arranged in the integrated shell, and is located directly below the nozzle in a direction perpendicular to the ground, the water collecting tray is arranged on the inner surface of the integrated shell close to the ground, and the water collecting tray is located directly below the curtain-type filler in a direction perpendicular to the ground, and one end of the drain pipe is connected to the water collecting tray.

3. The integrated tunnel purification device with ventilation and air purification and cooling functions according to claim 2 is characterized in that: The water curtain also includes a water valve, which is arranged on the water inlet pipe and is used to control the spray water flow of the nozzle.

4. The integrated tunnel purification device with ventilation and air purification and cooling functions according to claim 3 is characterized in that: The water valve is a solenoid valve.

5. The integrated tunnel purification device with ventilation and air purification and cooling functions according to claim 2 is characterized in that: The water curtain also includes a water filter, a water inlet of the water filter is connected to the other end of the drain pipe, and a water outlet of the water filter is connected to the water tank.

6. The integrated tunnel purification device with ventilation and air purification and cooling functions according to claim 2 is characterized in that: The water curtain also includes a water supply pipe, and the water supply pipe is connected to the water tank.

7. The integrated tunnel purification device with ventilation and air purification and cooling functions according to claim 2 is characterized in that: The water curtain also includes a front water baffle and a rear water baffle, one end of the front water baffle and the rear water baffle are both arranged on the inner surface of the integrated shell away from the ground, the other end of the front water baffle and the rear water baffle are set at a height lower than the setting height of the end of the curtain-type filler close to the ground, and the front water baffle is located between the curtain-type filler and the NO2 filter, and the rear water baffle is located between the curtain-type filler and the jet fan.

8. The integrated tunnel purification device with ventilation and air purification and cooling functions according to claim 1 is characterized in that: The integrated shell includes a shell body and a tapered tube portion, both of which are shell structures with openings at both ends, one open end of the tapered tube portion is connected to an open end of the shell body, and the other open end of the tapered tube portion is connected to the air inlet end of the jet fan.

9. The integrated tunnel purification device with ventilation and air purification and cooling functions according to claim 8 is characterized in that: The vertical cross-section of the shell main body is rectangular, one open end of the tapered tube portion is rectangular, and the shape and size of the one open end of the tapered tube portion are the same as the shape and size of the vertical cross-section of the shell main body, the vertical cross-section of the shell at the air inlet end of the jet fan is circular, the other open end of the tapered tube portion is circular, and the shape and size of the other open end of the tapered tube portion are the same as the shape and size of the vertical cross-section of the shell at the air inlet end of the jet fan.

10. The integrated tunnel purification device with ventilation and air purification and cooling functions according to claim 1 is characterized in that: The electrostatic precipitator and the water curtain both use independent controllers, and the integrated tunnel purification device has the following working modes: ventilation-denitrification working mode, ventilation-denitrification-dust removal working mode, ventilation-denitrification-cooling working mode, and ventilation-denitrification-dust removal-cooling working mode.

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