Tunnel harmful gas detection and purification system

Abstract

The utility model discloses a tunnel harmful gas detection and purification system, and relates to the technical field of tunnel engineering. A tunnel harmful gas detection and purification system comprises a walking device, a shell is arranged on the walking device, an air inlet, an air outlet and an air duct communicating the air inlet and the air outlet are formed in the shell, an exhaust fan is arranged at the air inlet, a harmful gas detection device and a harmful gas purification device are sequentially arranged in the air duct in the air supply direction, and an exhaust fan is arranged at the air outlet. And the harmful gas detection device is connected with the alarm indication device. The harmful gas detection device and the harmful gas purification device are arranged in the same equipment, when it is detected that the concentration of the harmful gas exceeds the safety threshold value, the harmful gas can be purified, seamless connection of harmful gas detection and purification treatment is achieved, it is not needed to wait for response of a ventilation system, and the cost is reduced. The treatment time is greatly shortened, accumulation of harmful gas in the tunnel is avoided, and the safety risk caused by the fact that the harmful gas exceeds the standard is reduced.

Description

Technical Field

[0001] This application relates to the field of tunnel engineering technology, specifically to a tunnel harmful gas detection and purification system. Background Technology

[0002] The presence of harmful gases during tunnel construction and operation poses a significant safety hazard that cannot be ignored. Common harmful gases include carbon monoxide, methane, hydrogen sulfide, and sulfur dioxide. These gases not only cause serious harm to human health, such as poisoning and asphyxiation, but can also trigger fires and explosions, leading to substantial casualties and economic losses. Therefore, ensuring safe and reliable air quality within tunnels is crucial for protecting both personnel and tunnel safety.

[0003] To address the hazards of harmful gases in tunnels, the commonly used method is to first detect the concentration of harmful gases in the tunnel using a harmful gas detection device. When the concentration of harmful gases exceeds the safety threshold, fresh air is introduced into the tunnel through a mechanical ventilation system using methods such as exhaust, compressed air, or a combination of both to dilute and expel the harmful gases.

[0004] However, existing methods for detecting and treating hazardous gases have the following drawbacks: 1. The detection and treatment processes are separated. From the detection of excessive hazardous gases to the activation of the ventilation system for treatment, there is a certain delay, resulting in insufficient timeliness of treatment. This may lead to the accumulation of hazardous gases in the tunnel, increasing safety risks. 2. Mechanical ventilation systems are ineffective in long tunnels due to high ventilation resistance, unstable air volume and velocity, and difficulty in effectively diluting and expelling hazardous gases, especially when the hazardous gas leak point is far from the ventilation opening. Utility Model Content

[0005] The purpose of this application is to provide a tunnel hazardous gas detection and purification system to solve the problem of hazardous gases accumulating in the tunnel and increasing safety risks due to the separation of detection and treatment processes.

[0006] The technical solution adopted by this application to solve its technical problem is:

[0007] A tunnel hazardous gas detection and purification system includes a walking device with a housing. The housing has an air inlet, an air outlet, and a duct connecting the air inlet and the air outlet. The air inlet is equipped with an exhaust fan. Hazardous gas detection devices and hazardous gas purification devices are arranged sequentially along the air supply direction in the duct. The air outlet is equipped with an exhaust fan. The hazardous gas detection devices are connected to an alarm indicator device.

[0008] Furthermore, a filter screen is provided at the air inlet.

[0009] Furthermore, the housing includes an outer casing, a vertical pipe, and a horizontal pipe. The outer casing is mounted on the walking device. The exhaust port is provided on the wall of one end of the outer casing. The other end of the outer casing is connected to the lower end of the vertical pipe. The upper end of the vertical pipe is connected to one end of the horizontal pipe. The other end of the horizontal pipe forms the air inlet. The horizontal pipe and the vertical pipe communicate with the inner cavity of the outer casing to form the air duct. The harmful gas detection device and the harmful gas purification device are located in the inner cavity of the outer casing.

[0010] Furthermore, the outer casing has multiple exhaust vents on its walls, and each exhaust vent is equipped with an exhaust fan.

[0011] Furthermore, the outer casing has an openable and closable door located on the wall opposite the harmful gas purification device.

[0012] Furthermore, the air duct is provided with a first isolation net located between the harmful gas detection device and the harmful gas purification device.

[0013] Furthermore, the hazardous gas detection device includes a gas detector for detecting different types of hazardous gases.

[0014] Furthermore, the harmful gas purification device includes a primary filtration and adsorption component and a secondary adsorption and decomposition component arranged sequentially along the air supply direction.

[0015] Furthermore, a second isolation mesh is provided in the air duct between the primary filtration adsorption component and the secondary adsorption decomposition component.

[0016] Furthermore, the primary filtration and adsorption component includes a synthetic fiber filter cotton layer and an alkaline adsorption layer, and the secondary adsorption and decomposition component includes a modified activated carbon adsorption layer, a catalytic oxidation layer, and a HEPA final filter layer.

[0017] The beneficial effects of this application are:

[0018] The tunnel hazardous gas detection and purification system provided in this application embodiment sets up a hazardous gas detection device and a hazardous gas purification device in the same device. When the hazardous gas detection device detects that the concentration of hazardous gas exceeds the safety threshold, the hazardous gas purification device can be used to purify the hazardous gas. This achieves seamless connection between hazardous gas detection and purification, without waiting for the ventilation system to respond, greatly shortening the processing time, avoiding the accumulation of hazardous gas in the tunnel, and reducing the safety risks caused by excessive hazardous gas levels.

[0019] By incorporating a mobile device, the entire system can move freely within the tunnel, unrestricted by fixed locations. This is particularly suitable for long tunnels or situations where the source of hazardous gas leaks is far from the ventilation opening, improving the system's applicability and flexibility. An alarm indicator device is installed to alert operators when the hazardous gas concentration exceeds the safety threshold, prompting timely intervention. An exhaust fan quickly draws hazardous gases from the tunnel into the ventilation duct for purification, reducing their residence time and preventing uncontrolled diffusion. An exhaust fan discharges the treated air through the vents while maintaining negative pressure within the duct to prevent backflow of unpurified air and ensure effective purification. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a perspective view of the tunnel hazardous gas detection and purification system provided in the embodiments of this application;

[0022] Figure 2 This is a cross-sectional view of the tunnel hazardous gas detection and purification system provided in the embodiments of this application;

[0023] Figure 3 This is a side view of the tunnel hazardous gas detection and purification system provided in the embodiments of this application.

[0024] Figure label:

[0025] 1-Walking device;

[0026] 2-Shell;

[0027] 21-Outer casing; 211-Exhaust vent; 212-Door;

[0028] 22-Vertical tube;

[0029] 23-Horizontal pipe; 231-Air inlet;

[0030] 24-Air duct;

[0031] 25-Filter screen;

[0032] 26 - First isolation net;

[0033] 27 - Second isolation net;

[0034] 3-Exhaust fan;

[0035] 4- Hazardous gas detection device;

[0036] 5- Harmful gas purification device; 51- Primary filtration and adsorption component; 52- Secondary adsorption and decomposition component;

[0037] 6-Exhaust fan;

[0038] 7- Alarm indicator device;

[0039] 8-Storage battery. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0041] In the description of this application, the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] See Figure 1 , Figure 2 , Figure 3This application provides a tunnel hazardous gas detection and purification system, including a walking device 1, a housing 2 on the walking device 1, an air inlet 231, an air outlet 211 and an air duct 24 connecting the air inlet 231 and the air outlet 211, an exhaust fan 3 on the air inlet 231, a hazardous gas detection device 4 and a hazardous gas purification device 5 arranged sequentially along the air supply direction in the air duct 24, an exhaust fan 6 on the air outlet 211, and a hazardous gas detection device 4 connected to an alarm indicator device 7.

[0044] The traveling device 1 is used to install and support other components of the system and can move within the tunnel. Exemplarily, the traveling device 1 may include a frame, four wheels mounted at the bottom of the frame, and a handle mounted at one end of the frame. All other components of the system are mounted on the frame. During operation, the worker pushes the handle to make the wheels roll within the tunnel, thus moving the traveling device 1. Alternatively, a motor connected to the wheel drive can be mounted on the frame, driving the wheels to rotate. During operation, the motor is started, and the worker grips the handle to control the direction, thus moving the traveling device 1 within the tunnel. Of course, the traveling device 1 can also adopt other existing structures, such as electric trolleys or AGVs, etc., without specific limitations here.

[0045] The housing 2 is mounted on the frame of the traveling device 1. An air inlet 231 and an exhaust outlet 211 are provided on the outer wall of the housing 2. An air duct 24 connecting the air inlet 231 and the exhaust outlet 211 is provided inside the housing 2. An exhaust fan 3 is installed at the air inlet 231, which continuously draws air from the tunnel into the air duct 24 of the housing 2. A hazardous gas detection device 4 and a hazardous gas purification device 5 are sequentially installed in the air duct 24 from the air inlet 231 to the exhaust outlet 211. The hazardous gas detection device 4 detects the concentration of hazardous gases in the air, and the hazardous gas purification device 5 purifies the hazardous gases in the air. An exhaust fan 6 is installed at the exhaust outlet 211, which exhausts the purified air away through the exhaust outlet 211.

[0046] The alarm indicator 7 can be installed on the walking device 1 or the housing 2 and connected to the hazardous gas detection device 4 via wired or wireless means. When the hazardous gas detection device 4 detects that the concentration of hazardous gas in the tunnel exceeds the safety threshold, the alarm indicator 7 can be used to sound an alarm or indicate that the concentration of hazardous gas in the tunnel exceeds the standard and that the hazardous gas needs to be purified by the hazardous gas purification device 5. This prevents the entire system from being mistakenly moved away because the operator fails to notice the excessive concentration of hazardous gas in time.

[0047] For example, the alarm indicator 7 may include an audible and visual alarm, and the hazardous gas detection device 4 may be connected to the audible and visual alarm via wired or wireless means. When the hazardous gas detection device 4 detects that the concentration of hazardous gas in the tunnel exceeds the safety threshold, the audible and visual alarm is activated and emits an audible and visual alarm signal to remind the operator that the concentration of hazardous gas in the tunnel exceeds the standard; when the hazardous gas detection device 4 detects that the concentration of hazardous gas in the tunnel is below the safety threshold, the audible and visual alarm stops sounding to remind the operator that the concentration of hazardous gas in the tunnel does not exceed the standard.

[0048] Of course, the alarm indicator 7 may also include a display screen. The hazardous gas detection device 4 can be connected to the display screen via wired or wireless means. The display screen can display at least the following information: the type of hazardous gas, the real-time concentration value of the hazardous gas, the safety threshold of the hazardous gas, and a prompt indicating whether the concentration of the hazardous gas exceeds the standard. Among these, the prompt indicating whether the concentration of the hazardous gas exceeds the standard can be displayed using different colored fonts or a flashing method. For example, when the hazardous gas detection device 4 detects that the concentration of the hazardous gas in the tunnel exceeds the safety threshold, it can display an over-standard prompt in red font on the display screen in a flashing manner to remind the operator that the concentration of the hazardous gas in the tunnel exceeds the standard; when the hazardous gas detection device 4 detects that the concentration of the hazardous gas in the tunnel does not exceed the safety threshold, it can display a not-exceeding prompt in green font on the display screen in a flashing manner to remind the operator that the concentration of the hazardous gas in the tunnel does not exceed the standard.

[0049] The tunnel hazardous gas detection and purification system provided in this application embodiment is used to detect and purify hazardous gases in tunnels. The specific operation process is as follows:

[0050] The operator controls the walking device 1 to move within the tunnel, moving the entire system to the area to be tested. The exhaust fan 3 continuously supplies air from the area to be tested into the air duct 24 via the air inlet 231. The hazardous gas detection device 4 detects the concentration of hazardous gases in the air supplied to the air duct 24, and the hazardous gas purification device 5 purifies the hazardous gases in the air supplied to the air duct 24. The exhaust fan 6 then exhausts the purified air through the exhaust outlet 211. When the alarm indicator 7 does not issue an audible or visual alarm or displays a "no exceedance" indication, it reminds the operator that the concentration of hazardous gases in the area to be tested is within acceptable limits. At this time, the operator can control the walking device 1 to move within the tunnel, moving the entire system to the next area to be tested. When the alarm indicator 7 issues an audible and visual alarm or displays an indication of exceeding the standard, it reminds the operator that the concentration of harmful gas in the area to be tested exceeds the standard. The operator controls the entire system to remain in the area to be tested and uses the harmful gas purification device 5 to continuously purify the harmful gas. The purified air is discharged through the exhaust port 211 until the alarm indicator 7 no longer issues an audible and visual alarm or displays an indication of not exceeding the standard.

[0051] The tunnel hazardous gas detection and purification system provided in this application embodiment sets up the hazardous gas detection device 4 and the hazardous gas purification device 5 in the same device. When the hazardous gas detection device 4 detects that the concentration of hazardous gas exceeds the safety threshold, the hazardous gas purification device 5 can be used to purify the hazardous gas. This achieves seamless connection between hazardous gas detection and purification, without waiting for the ventilation system to respond, greatly shortening the processing time, avoiding the accumulation of hazardous gas in the tunnel, and reducing the safety risks caused by excessive hazardous gas. By installing the walking device 1, the entire system can move freely within the tunnel without being restricted by a fixed position. This is especially suitable for long tunnels or situations where the source of harmful gas leaks is far from the ventilation opening, improving the applicability and flexibility of the entire system. By installing the alarm indicator device 7, once the harmful gas detection device 4 detects that the concentration of harmful gas exceeds the safety threshold, the alarm indicator device 7 can be used to sound an alarm or issue an indication, which can help remind operators that the harmful gas in the tunnel exceeds the standard and needs to be dealt with in a timely manner. By installing the exhaust fan 3, the harmful gas in the tunnel can be quickly drawn into the air duct 24 and purified by the harmful gas purification device 5, reducing the residence time of harmful gas in the tunnel and preventing the disorderly diffusion of harmful gas in the tunnel. By installing the exhaust fan 6, the treated air is discharged from the exhaust port 211, while maintaining a negative pressure state in the air duct 24 to prevent unpurified air from flowing back from the exhaust port 211 and ensure the purification effect.

[0052] In some embodiments, see Figure 1 , Figure 2 A filter screen 25 is installed at the air inlet 231. Accordingly, by installing the filter screen 25 at the air inlet 231, large particles of dust, gravel, and other impurities in the air inside the tunnel are intercepted, preventing these impurities from entering the air duct 24 through the air inlet 231, reducing the burden on the subsequent harmful gas purification device 5, and enabling it to purify harmful gases more efficiently.

[0053] In some embodiments, see Figure 1 , Figure 2 The housing 2 includes an outer box 21, a vertical pipe 22 and a horizontal pipe 23. The outer box 21 is mounted on the walking device 1. An exhaust port 211 is provided on the wall of one end of the outer box 21. The other end of the outer box 21 is connected to the lower end of the vertical pipe 22. The upper end of the vertical pipe 22 is connected to one end of the horizontal pipe 23. The other end of the horizontal pipe 23 forms an air inlet 231. The horizontal pipe 23, the vertical pipe 22 and the inner cavity of the outer box 21 are connected to form an air duct 24. The harmful gas detection device 4 and the harmful gas purification device 5 are located in the inner cavity of the outer box 21.

[0054] The outer casing 21 can be a cubic box formed by a top wall, a bottom wall, and four side walls connecting the top and bottom walls. The bottom wall of the outer casing 21 is supported on and fixedly connected to the walking device 1. The hazardous gas detection device 4 and the hazardous gas purification device 5 are installed in the inner cavity of the outer casing 21. An exhaust port 211 is provided on the left side wall of the outer casing 21, and an exhaust fan 6 is installed at the exhaust port 211. The vertical pipe 22 and the horizontal pipe 23 can both be square, rectangular, or round pipes. The lower end of the vertical pipe 22 is fixedly connected to the right end of the top wall of the outer casing 21, and the upper end of the vertical pipe 22 is fixedly connected to the left end of the horizontal pipe 23. The right end of the horizontal pipe 23 forms an air inlet 231 and is equipped with a filter screen 25. The exhaust fan 3 is installed in the inner cavity of the horizontal pipe 23.

[0055] Correspondingly, the horizontal pipe 23 and vertical pipe 22 connect with the inner cavity of the outer casing 21 to form an air duct 24, ensuring that air can efficiently enter from the air inlet 231, be processed by the harmful gas detection device 4 and the harmful gas purification device 5, and then be discharged from the exhaust port 211. By installing the harmful gas detection device 4 and the harmful gas purification device 5 in the inner cavity of the outer casing 21, the entire system has a compact structure and occupies little space, making it particularly suitable for use in space-constrained tunnel environments. By setting the vertical pipe 22 and horizontal pipe 23, the orientation of the air inlet 231 can be flexibly designed as needed, improving the system's adaptability.

[0056] In some embodiments, see Figure 3 The outer casing 21 has multiple exhaust vents 211 on its walls, and each exhaust vent 211 is equipped with an exhaust fan 6. For example, the outer casing 21 has five exhaust vents 211 on its side walls, and the five exhaust vents 211 are arranged at intervals in the horizontal direction.

[0057] Correspondingly, by setting multiple exhaust vents 211, the exhaust volume can be increased to quickly discharge the purified air. By setting an exhaust fan 6 at each exhaust vent 211, it can be ensured that even if one exhaust fan 6 fails, the other exhaust fans 6 can still work normally, maintaining the normal operation of the system.

[0058] In some embodiments, see Figure 1 , Figure 2 The outer casing 21 has an openable and closable door 212 on its wall opposite the harmful gas purification device 5. For example, the door 212 is located on the top wall of the outer casing 21, and the door 212 can be opened and closed by sliding or by rotating.

[0059] Accordingly, the enclosure door 212 facilitates maintenance and repair of the hazardous gas purification device 5 by operators. Specifically, operators can directly access the hazardous gas purification device 5 by opening the enclosure door 212, and then perform maintenance or replacement on the device. When the enclosure door 212 is closed, it effectively seals the internal space of the outer enclosure 21, preventing the leakage of unpurified air.

[0060] In some embodiments, see Figure 2 The air duct 24 is equipped with a first isolation net 26 located between the harmful gas detection device 4 and the harmful gas purification device 5. The first isolation net 26 can be made of metal mesh and is vertically arranged in the inner cavity of the outer casing 21. The harmful gas detection device 4 and the harmful gas purification device 5 are respectively arranged on both sides of the first isolation net 26.

[0061] Correspondingly, by setting up the first isolation net 26, the harmful gas detection device 4 and the harmful gas purification device 5 are arranged in two relatively independent areas inside the outer casing 21, which facilitates the operator to perform separate maintenance and repair.

[0062] In some embodiments, see Figure 2 The hazardous gas detection device 4 includes gas detectors for detecting different types of hazardous gases. These gas detectors include, but are not limited to, carbon monoxide detectors, methane detectors, hydrogen sulfide detectors, sulfur dioxide detectors, and nitrogen oxide detectors. For example, the hazardous gas detection device 4 includes four types of gas detectors, used to detect carbon monoxide, methane, hydrogen sulfide, and sulfur dioxide, respectively.

[0063] Correspondingly, by setting up different types of gas detectors, it is possible to detect a variety of harmful gases. The multi-gas detection capability enables the system to adapt to complex environmental conditions and ensure that the presence of harmful gases can be accurately detected under various circumstances.

[0064] In the above embodiments, the exhaust fan 3, the hazardous gas detection device 4, the ventilation fan 6, and the alarm indicator 7 can all be powered by their own batteries or connected to an external power supply. In some embodiments, see... Figure 2 The walking device 1 is equipped with a storage battery 8. The exhaust fan 3, the hazardous gas detection device 4, the ventilation fan 6, and the alarm indicator 7 are all connected to the storage battery 8 and powered by the storage battery 8. Of course, when the walking device 1 uses a motor to provide driving force, the storage battery 8 can also be connected to the motor and power the motor.

[0065] In some embodiments, see Figure 2The harmful gas purification device 5 includes a primary filtration and adsorption assembly 51 and a secondary adsorption and decomposition assembly 52 arranged sequentially along the air supply direction. Accordingly, the primary filtration and adsorption assembly 51 and the secondary adsorption and decomposition assembly 52 arranged sequentially along the air supply direction achieve efficient staged purification of harmful gases, thereby improving purification efficiency and enhancing purification effect.

[0066] In some embodiments, see Figure 2 The air duct 24 is equipped with a second isolation net 27 located between the primary filtration adsorption component 51 and the secondary adsorption decomposition component 52. The second isolation net 27 can be made of metal mesh and is vertically arranged in the inner cavity of the outer casing 21. The primary filtration adsorption component 51 and the secondary adsorption decomposition component 52 are respectively arranged on both sides of the second isolation net 27.

[0067] Accordingly, by setting up a second isolation net 27, the primary filtration adsorption component 51 and the secondary adsorption decomposition component 52 are respectively arranged in two relatively independent areas within the outer casing 21, facilitating separate maintenance and repair by operators. In some embodiments, the casing door 212 may include a first door and a second door, with the first door facing the primary filtration adsorption component 51 and the second door facing the secondary adsorption decomposition component 52. Operators can open the first door to inspect or replace the primary filtration adsorption component 51; operators can open the second door to inspect or replace the secondary adsorption decomposition component 52.

[0068] In some embodiments, the primary filtration and adsorption assembly 51 may include a synthetic fiber filter layer and an alkaline adsorption layer arranged sequentially along the air supply direction, and the secondary adsorption and decomposition assembly 52 may include a modified activated carbon adsorption layer, a catalytic oxidation layer, and a HEPA final filter layer arranged sequentially along the air supply direction. Of course, in other embodiments, the synthetic fiber filter layer and the alkaline adsorption layer may be arranged in an alternating overlapping manner along the air supply direction, and the modified activated carbon adsorption layer, the catalytic oxidation layer, and the HEPA final filter layer may also be arranged in an alternating overlapping manner; no specific limitations are made here.

[0069] The filter layer can be made of synthetic fiber filter cotton, which has high porosity and good air permeability, effectively intercepting fine particulate matter such as dust, sand, and fibers. The alkaline adsorption layer can be made of alkaline materials such as alkaline alumina, removing acidic gases such as sulfur dioxide and hydrogen sulfide through acid-base neutralization reactions. The modified activated carbon adsorption layer can be made of modified activated carbon, which has a high specific surface area and abundant pore structure, effectively adsorbing volatile organic compounds and other harmful gases in the air. The catalytic oxidation layer can be made of metal oxides or composite oxides, converting carbon monoxide, nitrogen oxides, etc., into harmless substances through catalytic reactions. The HEPA final filter layer can be made of glass fiber, polypropylene fiber, polyester fiber, composite fiber, etc., used for high-efficiency filtration of ultrafine particulate matter in the air.

[0070] Correspondingly, the primary filtration adsorption component 51 can initially filter fine particulate matter in the air and treat acidic gases through acid-base reactions; the secondary adsorption and decomposition component 52 can deeply adsorb and catalyze harmful gases, achieving the adsorption of volatile organic compounds, the conversion of carbon monoxide, the decomposition of hydrocarbons, and the interception of ultrafine particulate matter. After purification by the primary filtration adsorption component 51 and the secondary adsorption and decomposition component 52, the concentration of harmful gases in the air is reduced to below 1 ppm, and the concentration of particulate matter in the air is below 10 mg / m³. 3 It meets the requirements of the "Integrated Emission Standard for Air Pollutants".

[0071] To facilitate the installation and replacement of the primary filter adsorption component 51 and the secondary adsorption decomposition component 52, both the primary filter adsorption component 51 and the secondary adsorption decomposition component 52 are made into a cubic integral structure that matches the size and shape of the inner cavity of the outer casing 21. This facilitates the overall installation and replacement of the primary filter adsorption component 51 or the secondary adsorption decomposition component 52, thereby improving the efficiency of installation and replacement.

[0072] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A tunnel hazardous gas detection and purification system, characterized in that, The device includes a walking device (1), which has a housing (2). The housing (2) has an air inlet (231), an air outlet (211), and a duct (24) connecting the air inlet (231) and the air outlet (211). The air inlet (231) is equipped with an exhaust fan (3). The duct (24) is equipped with a harmful gas detection device (4) and a harmful gas purification device (5) in sequence along the air supply direction. The air outlet (211) is equipped with an exhaust fan (6). The harmful gas detection device (4) is connected to an alarm indicator device (7).

2. The tunnel hazardous gas detection and purification system according to claim 1, characterized in that, A filter screen (25) is provided at the air inlet (231).

3. The tunnel hazardous gas detection and purification system according to claim 1, characterized in that, The housing (2) includes an outer box (21), a vertical pipe (22) and a horizontal pipe (23). The outer box (21) is mounted on the walking device (1). The exhaust port (211) is provided on the wall of one end of the outer box (21). The other end of the outer box (21) is connected to the lower end of the vertical pipe (22). The upper end of the vertical pipe (22) is connected to one end of the horizontal pipe (23). The other end of the horizontal pipe (23) forms the air inlet (231). The horizontal pipe (23) and the vertical pipe (22) communicate with the inner cavity of the outer box (21) to form the air duct (24). The harmful gas detection device (4) and the harmful gas purification device (5) are located in the inner cavity of the outer box (21).

4. The tunnel hazardous gas detection and purification system according to claim 3, characterized in that, The outer casing (21) has a plurality of exhaust vents (211) on its wall, and each exhaust vent (211) is equipped with an exhaust fan (6).

5. The tunnel hazardous gas detection and purification system according to claim 3, characterized in that, The outer casing (21) has an openable and closable door (212) on its wall opposite the harmful gas purification device (5).

6. The tunnel hazardous gas detection and purification system according to claim 1, 2, 3, 4 or 5, characterized in that, The air duct (24) is provided with a first isolation net (26) located between the harmful gas detection device (4) and the harmful gas purification device (5).

7. The tunnel hazardous gas detection and purification system according to claim 1, 2, 3, 4 or 5, characterized in that, The harmful gas detection device (4) includes a gas detector for detecting different types of harmful gases.

8. The tunnel hazardous gas detection and purification system according to claim 1, 2, 3, 4 or 5, characterized in that, The harmful gas purification device (5) includes a primary filtration and adsorption component (51) and a secondary adsorption and decomposition component (52) arranged sequentially along the air supply direction.

9. The tunnel hazardous gas detection and purification system according to claim 8, characterized in that, The air duct (24) is provided with a second isolation net (27) located between the primary filtration adsorption component (51) and the secondary adsorption decomposition component (52).

10. The tunnel hazardous gas detection and purification system according to claim 8, characterized in that, The primary filtration and adsorption component (51) includes a synthetic fiber filter cotton layer and an alkaline adsorption layer, and the secondary adsorption and decomposition component (52) includes a modified activated carbon adsorption layer, a catalytic oxidation layer and a HEPA final filter layer.

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