Purification device for tunnel

Abstract

The invention provides a purification device for a tunnel, which comprises a box body, a first cavity and a second cavity which are independent from each other are formed in the box body in the transverse direction, and a filter plate extending in a horizontal plane is mounted in the second cavity so as to divide the second cavity into a first sub-cavity and a second sub-cavity which are communicated with each other from top to bottom; the air supply part is installed on the first cavity and communicates with the second sub-cavity, the part, extending out of the first cavity, of the air supply part is installed in the tunnel, and the air supply part is constructed to suck turbid airflow in the tunnel into the second sub-cavity; one end of the water conveying part extends into the first sub-chamber, and the water conveying part is configured to convey spraying water to the first sub-chamber and form a liquid accumulation layer on the upper side of the filter plate, so that turbid air flow flowing into the first sub-chamber from the second sub-chamber is in contact with the liquid accumulation layer, and a foam layer is formed on the filter plate to adsorb pollutants in the turbid air flow; and the purified air flow is discharged through the air outlet of the box body.

Description

Technical Field

[0001] At least one embodiment of the present invention relates to the technical field of purification devices, and in particular to a purification device for a tunnel. Background Art

[0002] With the rapid development of railway and highway construction projects, the proportion of tunnel projects in mountainous or hilly areas is increasing. The environmental pollution and ecological damage caused by tunnel construction are increasingly attracting people's attention. The air pollutants generated during tunnel construction are considered to be one of the sources of pollution affecting the environment. During the blasting and excavation stage of tunnel construction, a large amount of pollutants will be generated, and their composition is complex, including particulate pollutants formed by rocks and soil and chemical pollutants released by blasting explosives. It is of great significance to exhaust the pollutants in the tunnel as soon as possible to shorten the construction period and ensure the safety of workers.

[0003] In the prior art, the purification device used in tunnel construction is generally a ventilation fan, and its ventilation effect depends on airflow organization. During the tunnel blasting construction stage, a large amount of particulate matter and gaseous pollutants are difficult to be ventilated away. The pollutants dispersed in the tunnel seriously affect the construction and endanger the health of workers.

[0004] In order to solve the above problems, the prior art uses a filter element air purification device to purify the dust source at the construction site. However, the purification effect of this filter element air purification device is poor, the amount of pollutants generated by tunnel construction is large, the filter element life is short, and the maintenance cost of the purification equipment is high. Summary of the invention

[0005] In view of this, the present invention provides a purification device for a tunnel, which improves the adsorption amount of pollutants in the air inside the tunnel to reduce the content of pollutants in the air inside the tunnel.

[0006] According to an embodiment of the present invention, there is provided a purification device for a tunnel, comprising: a box body, in which a first chamber and a second chamber are formed independently of each other in the lateral direction, a filter plate extending in a horizontal plane is installed inside the second chamber to divide the second chamber into a first sub-chamber and a second sub-chamber which are interconnected from top to bottom; an air supply unit installed on the first chamber and connected to the second sub-chamber, the part of the air supply unit extending out of the first chamber is installed inside the tunnel, the air supply unit is configured to suck the turbid airflow inside the tunnel into the second sub-chamber; and a water delivery unit, one end of which extends into the first sub-chamber, is configured to deliver spray water to the first sub-chamber, and form a liquid accumulation layer on the upper side of the filter plate, so that the turbid airflow flowing from the second sub-chamber into the first sub-chamber contacts the liquid accumulation layer, and a foam layer is formed on the filter plate to absorb pollutants in the turbid airflow, and the purified airflow is discharged through the exhaust port of the box body.

[0007] According to an embodiment of the present invention, the air supply part includes: an air supply component installed inside the tunnel, one end of which extends into the first chamber and is connected to the interior of the tunnel; and a fan installed inside the first chamber, the exhaust end of the fan being connected to the second sub-chamber, so as to suck the turbid airflow inside the tunnel through the air supply component and transport the turbid airflow to the interior of the second sub-chamber.

[0008] According to an embodiment of the present invention, each of the air supply components includes: a main pipe installed inside the tunnel, one end of which extends into the first chamber; at least one branch pipe, one end of each of the branch pipes is connected to the main pipe; and at least one ventilation hood, which is constructed to be roughly conical and is respectively installed at the other end of each of the branch pipes to increase the suction range.

[0009] According to an embodiment of the present invention, each of the branch pipes is constructed as a flexible hose that is retractable in a length direction and bendable relative to the main pipe, so as to adjust the spatial posture of the air inlet end of the branch pipe.

[0010] According to an embodiment of the present invention, the water delivery part includes: a water pump, the water inlet end of the water pump is connected to the spray water source; a water delivery pipeline, one end of which is connected to the water outlet end of the water pump and the other end extends into the first sub-chamber to deliver spray water to the first sub-chamber; and a flow valve installed on the water delivery pipeline, suitable for adjusting the output of the spray water.

[0011] According to an embodiment of the present invention, the water pump is installed inside the first chamber, and the water inlet end of the water pump is connected to the second sub-chamber to extract the spray water inside the second sub-chamber, and transport the spray water in the second sub-chamber to the first sub-chamber through the water pipeline; wherein the spray water accumulated inside the first sub-chamber flows back to the second sub-chamber through the filter plate.

[0012] According to an embodiment of the present invention, the purification device also includes: a particle concentration meter installed in the construction area of ​​the tunnel, suitable for detecting the concentration of particulate matter in the turbid airflow in the construction area, the particle concentration meter is respectively communicated with the fan and the flow valve to adjust the output power of the fan and the opening of the flow valve according to the concentration of particulate matter in the turbid airflow in the construction area, so as to adjust the air suction volume of the fan and the water delivery volume of the water pipeline.

[0013] According to an embodiment of the present invention, the purification device also includes: a particle size measuring meter, which is installed in the construction area of ​​the tunnel and is suitable for detecting the particle size of particulate matter in the turbid airflow in the construction area, and replacing filter plates with different numbers of filter holes and different filter hole diameters according to the particle size of particulate matter in the turbid airflow in the construction area.

[0014] According to an embodiment of the present invention, the exhaust port is formed on the first sub-chamber, and a waterproof membrane extending in a horizontal plane and allowing air flow to pass is also provided inside the first sub-chamber, and the waterproof membrane is located at the lower side of the exhaust port in the height direction to prevent the spray water accumulated on the filter plate from overflowing from the exhaust port.

[0015] According to an embodiment of the present invention, an openable and closable inspection door is provided on the box at the position of the second chamber, which is suitable for replacing the filter plate; and / or, rollers are also installed at the bottom of the box to facilitate moving the purification device to the working position inside the tunnel.

[0016] According to the purification device for tunnels of the above embodiment of the present invention, the air supply unit is installed on the first chamber and communicated with the second sub-chamber. The part of the air supply unit extending from the first chamber is installed inside the tunnel to suck the turbid airflow inside the tunnel into the second sub-chamber. One end of the water delivery unit extends into the first sub-chamber to deliver spray water to the first sub-chamber and form a liquid accumulation layer on the upper side of the filter plate, so that the turbid airflow flowing from the second sub-chamber into the first sub-chamber contacts the liquid accumulation layer, forming a foam layer on the filter plate to absorb pollutants in the turbid airflow, and discharge the purified airflow through the exhaust port of the box. The purification device of the embodiment of the present invention increases the adsorption amount of pollutants in the air inside the tunnel to reduce the content of pollutants in the air inside the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a cross-sectional view of a purification device for a tunnel according to an embodiment of the present invention;

[0018] Figure 2 It is a schematic plan view of an air supply assembly, a particle concentration meter, and a particle size meter of a purification device for a tunnel according to an embodiment of the present invention installed inside a tunnel;

[0019] Figure 3 is a side view of a purification device for a tunnel according to an embodiment of the present invention; and

[0020] Figure 4 It is a cross-sectional view of a door panel of a purification device for a tunnel according to an embodiment of the present invention.

[0021] In the figure:

[0022] 1-Box;

[0023] 11-first chamber; 111-third sub-chamber; 1111-first side wall; 112-fourth sub-chamber;

[0024] 12-second chamber; 121-first sub-chamber; 122-second sub-chamber;

[0025] 13- Exhaust vent;

[0026] 14- air supply duct;

[0027] 15- Inspection door;

[0028] 151-frame;

[0029] 152-door panel; 1521-inner panel; 1522-outer panel; 1523-insulation board;

[0030] 16-Roller;

[0031] 2- Filter plate;

[0032] 3- Air supply unit;

[0033] 31-air outlet;

[0034] 32-air supply assembly; 321-main pipe; 322-branch pipe; 3221-air inlet end; 323-ventilation hood;

[0035] 33- fan; 331- exhaust end;

[0036] 4- Water delivery department;

[0037] 41-water pump; 411-water inlet; 412-water outlet;

[0038] 42- water pipeline;

[0039] 43-flow valve;

[0040] 5- Particle concentration meter;

[0041] 6- Particle size measuring meter;

[0042] 7- Waterproof membrane;

[0043] 8- Top wall. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0045] According to the inventive concept of one aspect of the present invention, there is provided a purification device for a tunnel, comprising: a box body, in which a first chamber and a second chamber are formed independently of each other in the lateral direction, a filter plate extending in a horizontal plane is installed inside the second chamber to divide the second chamber into a first sub-chamber and a second sub-chamber which are interconnected from top to bottom; an air supply unit, which is installed on the first chamber and is connected to the second sub-chamber, and the part of the air supply unit extending out of the first chamber is installed inside the tunnel, and the air supply unit is configured to suck the turbid airflow inside the tunnel into the second sub-chamber; and a water delivery unit, one end of which extends into the first sub-chamber and is configured to deliver spray water to the first sub-chamber and form a liquid accumulation layer on the upper side of the filter plate, so that the turbid airflow flowing from the second sub-chamber into the first sub-chamber contacts the liquid accumulation layer, and a foam layer is formed on the filter plate to absorb pollutants in the turbid airflow, and the purified airflow is discharged through the exhaust port of the box body.

[0046] Figure 1 is a cross-sectional view of a purification device for a tunnel according to an embodiment of the present invention; Figure 2 It is a plan view schematically showing that an air supply assembly, a particle concentration meter, and a particle size meter of a purification device for a tunnel according to an embodiment of the present invention are installed inside a tunnel.

[0047] According to an exemplary embodiment of the present invention, please refer to Figure 1-Figure 2 , provides a purification device for a tunnel, including a housing 1, an air supply unit 3 and a water delivery unit 4. A first chamber 11 and a second chamber 12 are formed in the lateral direction inside the housing 1, which are independent of each other. A filter plate 2 extending in a horizontal plane is installed inside the second chamber 12 to divide the second chamber 12 into a first sub-chamber 121 and a second sub-chamber 122 which are interconnected from top to bottom. The air supply unit 3 is installed on the first chamber 11 and is connected to the second sub-chamber 122, and the part of the air supply unit 3 extending out of the first chamber 11 is installed inside the tunnel. The air supply unit 3 is configured to suck the turbid airflow inside the tunnel into the second sub-chamber 122. One end of the water delivery portion 4 extends into the first sub-chamber 121, and is configured to deliver spray water to the first sub-chamber 121 and form a liquid accumulation layer on the upper side of the filter plate 2, so that the turbid airflow flowing from the second sub-chamber 122 into the first sub-chamber 121 contacts the liquid accumulation layer, and forms a foam layer on the filter plate 2 to absorb pollutants in the turbid airflow, and discharge the purified airflow through the exhaust port 13 of the box body 1.

[0048] In this embodiment, the air supply unit 3 is installed on the first chamber 11, and is connected to the second sub-chamber 122 through the air supply port 31 formed on the first chamber 11. The part of the air supply unit 3 extending from the first chamber 11 is installed on the top wall 8 inside the tunnel to suck the turbid airflow inside the tunnel into the second sub-chamber 122. One end of the water delivery unit 4 extends into the first sub-chamber 121 to deliver spray water to the first sub-chamber 121, and forms a liquid accumulation layer on the upper side of the filter plate 2, so that the turbid airflow flowing from the second sub-chamber 122 into the first sub-chamber 121 contacts the liquid accumulation layer, and forms a foam layer on the filter plate 2 to absorb pollutants in the turbid airflow, and discharge the purified airflow through the exhaust port 13 of the box 1. The purification device of the embodiment of the present invention increases the adsorption amount of pollutants in the air inside the tunnel to reduce the content of pollutants in the air inside the tunnel.

[0049] It should be noted that, in the present embodiment, the spray water flows from the top of the filter plate 2 to the filter plate 2, and accumulates on the filter plate 2 to form a liquid accumulation layer. When the turbid airflow passes through the filter holes of the filter plate 2 from the lower side of the filter plate 2, bubbles are generated, and a foam layer is formed on the upper side of the filter plate 2, so that the pollutants in the turbid airflow are washed and purified. The foam layer can effectively separate the particulate pollutants in the turbid airflow by good blocking, wetting, adhesion and the like, and the foam layer can also absorb and purify the gaseous pollutants in the turbid airflow. Among them, the purification device of the embodiment of the present invention should first open the water supply part 4 during use, and after a certain stable water level liquid accumulation layer is formed on the filter plate 2, the air supply part 3 is opened, and the turbid airflow overcomes the resistance of the filter plate 2, and bubbles are generated at the filter holes, so that the turbid airflow is washed and purified.

[0050] In some exemplary embodiments, referring to Figure 1-Figure 2 The air supply unit 3 includes an air supply assembly 32 and a fan 33. The air supply assembly 32 is installed inside the tunnel, one end of which extends into the first chamber 11 and communicates with the inside of the tunnel. The fan 33 is installed inside the first chamber 11, and the exhaust end 331 of the fan 33 is communicated with the second sub-chamber 122, so as to suck the turbid airflow inside the tunnel through the air supply assembly 32 and transport the turbid airflow to the inside of the second sub-chamber 122.

[0051] It should be noted that, in the present embodiment, an air supply duct 14 is formed inside the first chamber 11, and an air supply port 31 is formed on a side wall of the air supply duct 14 adjacent to the second sub-chamber 122. The air supply assembly 32 is mounted on the top wall 8 inside the tunnel, one end of which extends into the air supply duct 14 and communicates with the inside of the tunnel. The fan 33 is mounted inside the air supply duct 14, and an exhaust end 331 of the fan 33 communicates with the second sub-chamber 122 through the air supply port 31, so as to suck the turbid airflow inside the tunnel through the air supply assembly 32 and transport the turbid airflow to the inside of the second sub-chamber 122.

[0052] In some exemplary embodiments, referring to Figure 1-Figure 2 Each air supply assembly 32 includes a main pipe 321, at least one branch pipe 322, and at least one ventilation hood 323. The main pipe 321 is installed inside the tunnel, and one end thereof extends into the first chamber 11. One end of each branch pipe 322 is connected to the main pipe 321. At least one ventilation hood 323 is configured to be roughly conical and is respectively installed at the other end of each branch pipe 322 to increase the air suction range and the number of local ventilation times in the construction area.

[0053] It should be noted that, in this embodiment, the main pipe 321 extends in the horizontal direction, is installed on the top wall 8 inside the tunnel, and one end extends into the air supply duct 14 formed inside the first chamber 11. The branch pipe 322 extends in the height direction.

[0054] In this embodiment, the air supply assembly 32 includes a plurality of branch pipes 322 to form a plurality of air inlet ends 3221, which can collect pollutant emission sources at multiple points inside the tunnel.

[0055] In some exemplary embodiments, referring to Figure 1-Figure 2 Each branch pipe 322 is constructed as a flexible hose that is retractable in the length direction and bendable relative to the main pipe 321 to adjust the spatial posture of the air inlet end 3221 of the branch pipe 322 .

[0056] It should be noted that, in this embodiment, the branch pipe 322 can be made of industrial bamboo tube. Due to its own material properties, the branch pipe 322 can be expanded and contracted in the length direction, and bent relative to the main pipe 321 to adjust the spatial posture of the air inlet end 3221 of the branch pipe 322, thereby greatly reducing the spatial distance between the air inlet end 3221 and the pollution source, and ensuring the purification effect of pollutants in the construction area.

[0057] In some exemplary embodiments, referring to Figure 1 The water delivery part 4 includes a water pump 41, a water delivery pipeline 42 and a flow valve 43. The water inlet end 411 of the water pump 41 is connected to the spray water source. One end of the water delivery pipeline 42 is connected to the water outlet end 412 of the water pump 41, and the other end extends into the first sub-chamber 121 to deliver spray water to the first sub-chamber 121. The flow valve 43 is installed on the water delivery pipeline 42 and is suitable for adjusting the output of the spray water.

[0058] In some exemplary embodiments, referring to Figure 1The water pump 41 is installed inside the first chamber 11, and the water inlet end 411 of the water pump 41 is connected with the second sub-chamber 122 to extract the spray water inside the second sub-chamber 122, and transport the spray water in the second sub-chamber 122 to the first sub-chamber 121 through the water delivery pipe 42. The spray water accumulated inside the first sub-chamber 121 flows back to the second sub-chamber 122 through the filter plate 2. One end of the water delivery pipe 42 is connected with the water outlet end 412 of the water pump 41, and the other end extends into the first sub-chamber 121.

[0059] It should be noted that, in the present embodiment, the highest liquid level of the spray water inside the second sub-chamber 122 is located at the lower side of the air supply port 31, so as to prevent the spray water in the second sub-chamber 122 from blocking the air supply port 31, hindering the turbid airflow from entering the second sub-chamber 122, and preventing the spray water from flowing back from the air supply port 31 to the first chamber 11.

[0060] In some exemplary embodiments, referring to Figure 1 , a third sub-chamber 111 and a fourth sub-chamber 112 are formed inside the first chamber 11, which are independent of each other from top to bottom. The third sub-chamber 111 is configured as an air supply duct 14, and the fan 33 is installed inside the third sub-chamber 111. The air supply port 31 is formed on the first side wall 1111 of the third sub-chamber 111 close to the second sub-chamber 122. The water pump 41 is installed inside the fourth sub-chamber 112, and the water delivery pipeline 42 extends from the top of the fourth sub-chamber 112 and extends from the first side wall 1111 of the third sub-chamber 111 into the first sub-chamber 121.

[0061] Through the above-mentioned arrangement, the space utilization rate of the box body 1 is improved, space is saved, and the purification device is made compact and easy to use.

[0062] In some exemplary embodiments, referring to Figure 1-Figure 2 The purification device also includes a particle concentration meter 5. The particle concentration meter 5 is installed in the construction area of ​​the tunnel and is suitable for detecting the concentration of particles in the turbid airflow in the construction area. The particle concentration meter 5 is respectively connected to the fan 33 and the flow valve 43 for communicating with each other, so as to adjust the output power of the fan 33 and the opening of the flow valve 43 according to the concentration of particles in the turbid airflow in the construction area, so as to adjust the air suction volume of the fan 33 and the water delivery volume of the water delivery pipeline 42.

[0063] Through the above-mentioned setting method, the particle concentration meter 5 can realize real-time data signal transmission with the fan 33 and the flow valve 43, and can adjust the operating air volume and circulating water volume of the purification device according to the concentration of particulate pollutants in the turbid airflow in the construction area to ensure that the purification device is always in an efficient operating state.

[0064] In some exemplary embodiments, referring to Figure 1-Figure 2The purification device also includes a particle size meter 6. The particle size meter 6 is installed in the construction area of ​​the tunnel and is suitable for detecting the particle size of the particles in the turbid airflow in the construction area. According to the particle size of the particles in the turbid airflow in the construction area, the filter plate 2 with different numbers of filter holes and different filter hole diameters is replaced, so that the bubbles formed on the filter plate 2 are more low-resistance and high-efficiency, thereby improving the overall dust removal efficiency of the purification device.

[0065] In some exemplary embodiments, referring to Figure 1 The exhaust port 13 is formed on the first sub-chamber 121. A waterproof membrane 7 extending in a horizontal plane and allowing airflow to pass through is also provided inside the first sub-chamber 121. The waterproof membrane 7 is located at the lower side of the exhaust port 13 in the height direction to prevent the spray water accumulated on the filter plate 2 from overflowing from the exhaust port 13. The exhaust port 13 is formed on the side wall of the first sub-chamber 121.

[0066] Figure 3 is a side view of a purification device for a tunnel according to an embodiment of the present invention; Figure 4 It is a cross-sectional view of a door panel of a purification device for a tunnel according to an embodiment of the present invention.

[0067] In some exemplary embodiments, referring to Figure 1 as well as Figure 3-Figure 4 An openable and closable inspection door 15 is provided on the housing 1 at the position of the second chamber 12 , which is suitable for replacing the filter plate 2 .

[0068] It should be noted that the inspection door 15 includes a frame 151 and a door panel 152. The frame 151 is made of an anti-corrosion material, for example, an aluminum alloy profile or an anti-corrosion treated steel material. The door panel 152 includes an inner panel 1521, an outer panel 1522, and an insulation board 1523 sandwiched between the inner panel 1521 and the outer panel 1522 to prevent the spray water from freezing. Among them, the inner panel 1521 can be made of high-quality hot-dip galvanized steel plate, the outer panel 1522 can be made of a color steel plate / zinc-aluminum alloy plate, and the material selected for the insulation board 1523 should have the characteristics of being non-toxic, non-corrosive, odorless, flame-retardant or self-extinguishing, and not easy to absorb water.

[0069] The box body 1 is made of corrosion-resistant plate, and the wall thickness of the box body 1 is greater than 20 mm, meeting its own strength requirements. The fan 33, control switch (not shown in the figure), maintenance light (not shown in the figure) and other components installed on the box body 1 need to consider explosion-proof requirements.

[0070] In some exemplary embodiments, referring to Figure 1 A roller 16 is also installed at the bottom of the box body 1 to facilitate the movement of the purification device to the working position inside the tunnel.

[0071] In this embodiment, considering the characteristics of large working surface and dispersed emission sources during construction work inside the tunnel, the purification device of the embodiment of the present invention is convenient for on-site workers to move the purification device by installing rollers 16 at the bottom of the box 1, so as to be arranged near the emission source of pollutants, reduce the total amount of pollutant emission in the tunnel from the source, and meet the flexible arrangement of the purification device under different construction conditions to improve the purification effect of pollutants inside the tunnel. Compared with the existing purification devices, it is flexible and mobile, and can better cope with complex field application scenarios.

[0072] The purification device for tunnels in the embodiment of the present invention adopts a wet purification method, which relies on the interaction between the gas phase and the liquid phase to generate a large amount of foam, increases the contact time and contact area between the gas and the liquid, and has a purification effect on the gas, liquid and solid three-phase pollutants in the gas phase. The purification medium used by the wet purification method is a liquid. For example, water is used as the purification medium for filtering turbid airflow. It has strong universality and high availability of purification media. Compared with the fiber used in the dry filtration method, the pollution capacity of the unit mass of the purification medium is greatly improved, so as to improve the air quality in the construction area inside the tunnel and protect the health of the staff. Furthermore, the service life of the purification device is increased, the operation and maintenance cost of the purification device is reduced, and the filter plate 2 is easy to handle after filtration, which is environmentally friendly. Therefore, in the working scene of heavily polluted air environment such as tunnel construction, the wet purification method has a trend of gradually replacing the dry filtration method.

[0073] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A purification device for a tunnel, comprising: A box body (1) is provided with a first chamber (11) and a second chamber (12) which are independent of each other in a transverse direction, and a filter plate (2) extending in a horizontal plane is installed inside the second chamber (12) to divide the second chamber (12) into a first sub-chamber (121) and a second sub-chamber (122) which are interconnected from top to bottom; an air supply unit (3) installed on the first chamber (11) and communicating with the second sub-chamber (122); a portion of the air supply unit (3) extending from the first chamber (11) is installed inside the tunnel; and the air supply unit (3) is configured to draw turbid airflow inside the tunnel into the second sub-chamber (122); as well as The water delivery part (4) has one end extending into the first sub-chamber (121) and is configured to deliver spray water to the first sub-chamber (121) and form a liquid accumulation layer on the upper side of the filter plate (2), so that the turbid airflow flowing from the second sub-chamber (122) into the first sub-chamber (121) contacts the liquid accumulation layer, forming a foam layer on the filter plate (2) to absorb pollutants in the turbid airflow, and discharge the purified airflow through the exhaust port (13) of the box body (1).

2. The purification device for tunnel according to claim 1, wherein: The air supply unit (3) comprises: an air supply assembly (32) installed inside the tunnel, one end of which extends into the first chamber (11) and communicates with the interior of the tunnel; and A fan (33) is installed inside the first chamber (11), and an exhaust end (331) of the fan (33) is connected to the second sub-chamber (122) so as to suck the turbid airflow inside the tunnel through the air supply component (32) and transport the turbid airflow to the inside of the second sub-chamber (122).

3. The purification device for tunnel according to claim 2, wherein: Each of the air supply components (32) comprises: A main pipe (321) installed inside the tunnel, one end of which extends into the first chamber (11); at least one branch pipe (322), one end of each branch pipe (322) being connected to the main pipe (321); and At least one ventilation hood (323) is constructed in a substantially conical shape and is installed at the other end of each branch pipe (322) to increase the air suction range.

4. The purification device for tunnel according to claim 3, wherein: Each branch pipe (322) is constructed as a flexible hose that is retractable in the length direction and bendable relative to the main pipe (321) to adjust the spatial posture of the air inlet end (3221) of the branch pipe (322).

5. The purification device for tunnel according to claim 2, wherein: The water delivery part (4) comprises: A water pump (41), wherein a water inlet end (411) of the water pump (41) is connected to a spray water source; a water delivery pipeline (42), one end of which is in communication with the water outlet (412) of the water pump (41), and the other end of which extends into the first sub-chamber (121) so as to deliver spray water to the first sub-chamber (121); and The flow valve (43) is installed on the water delivery pipeline (42) and is suitable for adjusting the output of the spray water.

6. The purification device for tunnel according to claim 5, wherein: The water pump (41) is installed inside the first chamber (11), and the water inlet end (411) of the water pump (41) is connected to the second sub-chamber (122) to extract the spray water inside the second sub-chamber (122), and transport the spray water in the second sub-chamber (122) to the first sub-chamber (121) through the water delivery pipeline (42); The spray water accumulated in the first sub-chamber (121) flows back into the second sub-chamber (122) through the filter plate (2).

7. The purification device for tunnel according to claim 5, wherein: The purification device also includes: A particle concentration meter (5) is installed in the construction area of ​​the tunnel and is suitable for detecting the concentration of particles in the turbid airflow in the construction area. The particle concentration meter (5) is respectively connected to the fan (33) and the flow valve (43) for adjusting the output power of the fan (33) and the opening of the flow valve (43) according to the concentration of particles in the turbid airflow in the construction area, so as to adjust the air suction volume of the fan (33) and the water delivery volume of the water delivery pipeline (42).

8. The purification device for a tunnel according to claim 1, wherein: The purification device also includes: A particle size measuring meter (6) is installed in the construction area of ​​the tunnel and is suitable for detecting the particle size of particles in the turbid airflow in the construction area. According to the particle size of the particles in the turbid airflow in the construction area, a filter plate (2) with different numbers of filter holes and different filter hole diameters is replaced.

9. The purification device for tunnel according to claim 1, wherein: The air outlet (13) is formed on the first sub-chamber (121), and a waterproof membrane (7) extending in a horizontal plane and allowing air flow to pass through is also provided inside the first sub-chamber (121), and the waterproof membrane (7) is located at the lower side of the air outlet (13) in the height direction to prevent the spray water accumulated on the filter plate (2) from overflowing from the air outlet (13).

10. The purification device for tunnel according to claim 1, wherein: The housing (1) is provided with an openable and closable inspection door (15) at the position of the second chamber (12), suitable for replacing the filter plate (2); and / or, Rollers (16) are also installed at the bottom of the box (1) to facilitate the movement of the purification device to a working position inside the tunnel.

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