A composite pollutant control system for high-risk spaces and ground

Abstract

A composite pollutant control system for high-risk spaces and ground, belonging to the fields of public health, environmental disinfection and pollution control. The system integrates a purification duct, a module complex (including ultraviolet disinfection, photocatalytic enhancement, sensing, control system and other modules), a safety protection module and an ultraviolet reflection suppression module. When the pedestrian flow is dense, the purification duct adjusts the airflow direction according to the distribution characteristics of the pedestrian flow period. When the pedestrian flow is discontinuous, the low-pressure mercury lamp is started to effectively disinfect the microorganisms on the ground and in the air, and the photocatalytic enhancement module is combined to improve the disinfection efficiency. The sensing module monitors the approach of personnel in real time to ensure that the ultraviolet lamp is turned off immediately when there are personnel to ensure safety. The ultraviolet reflection suppression module uses ultraviolet absorbing materials on the ground to avoid ultraviolet reflection and reduce harm to personnel. The system controls composite pollutants in the air and the ground under the coexistence of man and machine, and is suitable for environmental safety protection in high-risk and complex scenes.

Description

Technical Field

[0001] The invention relates to a composite pollutant control system for high-risk spaces and ground, and belongs to the fields of public health, environmental disinfection and pollution control. Background Art

[0002] Public places are places with high microbial contamination intensity, especially entrances and exits where people frequently pass through, which are prone to the accumulation of bacteria, viruses and other microorganisms, resulting in excessive microbial concentrations and increasing the risk of disease transmission. Traditional disinfection methods mainly rely on manual spraying of disinfectants, which has problems such as large workload, uneven disinfection, and impact on the environment.

[0003] Ultraviolet disinfection technology is widely used in disinfection of air and surfaces due to its high efficiency and rapidity (CN202323542062.9). However, ultraviolet rays in the UV-C band are harmful to human skin and eyes, and direct or reflected ultraviolet rays may cause harm to the human body. Therefore, the application of ultraviolet disinfection in public places requires strict safety measures to prevent harm to personnel (CN202322891165.X). Photocatalytic technology uses photocatalytic materials to produce active oxygen species with strong oxidizing ability under ultraviolet irradiation, which can effectively kill microorganisms and decompose organic pollutants (CN202222687957.0). Combining photocatalytic technology with ultraviolet disinfection can improve the disinfection efficiency.

[0004] Low-temperature plasma technology is gradually being applied to the field of air purification to improve the efficiency of treating air pollutants. Low-temperature plasma technology generates a large number of active species such as high-energy electrons, ions, free radicals and ultraviolet rays through high-voltage discharge, which can directly react with TVOC, destroy its molecular structure, and achieve efficient pollutant removal (CN201921196782.5, Energy-saving intelligent tail gas treatment device for organic pollutant gas).

[0005] However, in public places such as shopping malls, hospitals and stations, due to the intensive human activities and the fact that some disinfection methods (such as ultraviolet rays) pose certain hazards to residents, it is difficult to effectively disinfect complex pollutants (such as PM, TVOC and microorganisms). There is a lack of a complex pollutant control system for high-risk spaces and grounds. Summary of the invention

[0006] In order to solve the problems existing in the prior art, the present invention provides a composite pollutant control system for high-risk spaces and ground surfaces, which uses a PLC controller to analyze the pedestrian flow data characteristics according to the detection data of the ozone sensor and the recorded data of the pedestrian flow counter, determine the pedestrian flow state, and regulate the crossflow fan and the low-temperature plasma generator based on the control mechanism constructed based on the pedestrian flow characteristics and the change of ozone concentration, thereby realizing intelligent regulation and optimized operation of the purification air duct. At the same time, the PLC controller, as the core control unit, connects the purification air duct, ultraviolet disinfection module, photocatalytic enhancement module and human body and pollutant sensing module to coordinate the operation of each module.

[0007] The technical solution adopted by the present invention is: a composite pollutant control system for high-risk spaces and ground, the system comprising a purification air duct, a module complex, a safety protection module and an ultraviolet reflection inhibition module;

[0008] The purification air duct is installed at the top of the space, and is equipped with a HEPA filter and a low-temperature plasma generator in the air duct; the low-temperature plasma generator will generate ozone during operation. When there is a dense flow of pedestrians, the fan is kept turned on. The control mechanism of the low-temperature plasma device is as follows:

[0009] When the average ozone concentration is greater than 0.16 mg / m 3 When the temperature is too low, shut down all low-temperature plasma devices;

[0010] When the average ozone concentration is greater than 0.12 mg / m 3 And less than 0.16 mg / m 3 When the low-temperature plasma device on the air inlet side is turned off;

[0011] When the average and maximum concentrations of ozone in one hour are both less than 0.16 mg / m 3 , turn on the low-temperature plasma device on the non-air inlet side;

[0012] When the average and maximum concentrations of ozone in one hour are both less than 0.12 mg / m 3 , turn on all low-temperature plasma devices.

[0013] The purification air duct adjusts the airflow direction according to the distribution characteristics of pedestrian flow during the time period, uses a pedestrian flow counter to record the number of people entering the first entrance and the second entrance respectively, and adjusts the direction of the cross-flow fan to make the entrance with high pedestrian flow into the space as the air inlet; the airflow direction is adjusted according to the level of pedestrian flow at the first entrance and the second entrance;

[0014] The module complex includes a PLC controller, a low-pressure mercury lamp in the UV-C band, a sensing module, a sunshade, an electric control device for the sunshade, a warning sign, a red warning light, and a photocatalytic enhancement module;

[0015] The PLC controller is electrically connected to a low-pressure mercury lamp in the UV-C band, a sensing module, and an electric control device for a light shield; the low-pressure mercury lamp in the UV-C band is used to disinfect microorganisms on the ground and in the air when pedestrian flow is discontinuous and no one is around; the photocatalytic enhancement module is located on the inner surface of the light shield, coated with titanium dioxide material, and stimulates photocatalytic reactions through ultraviolet rays to produce active oxygen; the sensing module includes an infrared sensor, a microwave radar sensor, and a pollutant concentration sensor to monitor personnel activities and pollutant concentrations in the air in real time;

[0016] The regulatory mechanism of the module complex is:

[0017] a. The sensing module detects whether there is someone in the environment. If someone is detected, the sensing module feeds back the signal to the PLC controller, and the PLC controller controls to turn off the low-pressure mercury lamp in the UV-C band;

[0018] b. The sensing module detects whether there is anyone in the environment. If no one is detected, the sensing module feeds back the signal to the PLC controller, and the PLC controller records the time for 30 seconds. If no one is detected in the environment, the PLC controller controls the turning on of the low-pressure mercury lamp in the UV-C band, and controls the electric control device of the shading hood to open the shading hood, and controls the warning sign and the red warning light to turn on;

[0019] c. Start disinfection, the sensing module continues to work, and if someone is detected in the environment, it returns to step a;

[0020] The PLC controller records the time. When the silent condition is reached after 15 minutes of continuous operation or 20 minutes of cumulative operation, the PLC controller is triggered to control the shutdown of the UV-C band low-pressure mercury lamp, retract the light shield, and turn off the warning sign and red warning light.

[0021] d. After the silent condition is met, the device is shut down and enters the silent state. In the silent state, the unit time is 30 minutes, and the system continuously monitors whether there is anyone passing by within the unit time. If someone passes by, the system silence ends after the 30-minute unit time ends, and the process goes to step a. If no one passes by during the silent process, the system goes to step a after the silent state reaches 3 hours.

[0022] e. Emergency stop: when an unexpected situation requires shutdown, the module complex is shut down based on the emergency stop device, and needs to be manually opened after closing, and then enter step a;

[0023] The safety protection module includes a delayed start mechanism, a warning system and an emergency stop device, wherein the warning system sends out visual and auditory warning signals before the low-pressure mercury lamp in the UV-C band is started and during operation, and the emergency stop button is set at the entrance of the disinfection area for personnel to manually control the shutdown of the low-pressure mercury lamp in the UV-C band;

[0024] The ultraviolet reflection suppression module is formed by laying or coating a material absorbing ultraviolet rays on the ground area.

[0025] The PLC controller analyzes the pedestrian flow data characteristics according to the detection data of the ozone sensor and the recorded data of the pedestrian flow counter, determines the pedestrian flow state, and controls the crossflow fan and the low-temperature plasma generator based on the control mechanism constructed based on the pedestrian flow characteristics and the change of ozone concentration. The light shield is made of aramid fiber, and its inner surface is evenly coated with titanium dioxide photocatalytic material, and the material thickness is 0.1 mm.

[0026] The system also has a remote monitoring function, which allows managers to view the working status and operation of the device in real time through the Internet of Things technology.

[0027] The beneficial effects of the present invention are as follows: the present invention realizes the removal of particulate matter (such as PM) in the air by integrating purification air duct, low temperature plasma, ultraviolet disinfection and photocatalysis technology. 2.5 and PM 10 ), volatile organic compounds (TVOC) and microorganisms, thereby fully controlling indoor composite pollutants. The system design takes into account the safety needs of human-machine coexistence. It can use the purification duct to continuously perform safe air purification operations when people are present. At the same time, it automatically activates the ultraviolet disinfection mode when pedestrian flow is discontinuous and no one is present, achieving deep purification of the air and the ground. This feature makes the system particularly suitable for high-risk public places with dense traffic, ensuring a clean and safe environment when people are active.

[0028] The system's purification air duct has the ability to dynamically adjust the direction of airflow, and can adjust the position of the air inlet and outlet according to the distribution characteristics of pedestrian flow during different periods of time, ensuring the best purification effect in crowded areas. The human body and pollutant sensing module can monitor the activities of people and the level of air pollution in real time, and immediately trigger the system to turn off the ultraviolet light when people approach to ensure the safety of people; at the same time, through the real-time feedback of TVOC, ozone and particulate matter sensors, the system dynamically responds to changes in air quality and automatically adjusts the purification intensity, thereby maintaining the best operating state in an environment with personnel flow and pollution changes.

[0029] The system uses multiple safety protection measures such as delayed start, emergency stop and warning system to further ensure safety in human-machine coexistence environments. The delayed start mechanism ensures that ultraviolet disinfection is only carried out when pedestrian flow is non-continuous, the emergency stop device provides manual intervention safety protection, and the warning system reminds surrounding personnel to pay attention to safety through visual and auditory signals. In addition, the ultraviolet reflection suppression module reduces the potential harm of ultraviolet reflection to personnel through sunshades and ultraviolet absorbing ground materials, ensuring safe use in complex environments. The modular and intelligent design of the system is not only convenient for remote monitoring and real-time adjustment, but also provides convenient installation, maintenance and replacement functions, providing an efficient, intelligent and human-machine coexistence pollutant control solution for environmental safety protection in high-risk public places. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the complex pollutant control system of the present invention.

[0031] Figure 2 It is a comprehensive structural diagram of the ultraviolet disinfection module, the photocatalytic enhancement module, the ultraviolet reflection inhibition module and the human body sensing module.

[0032] Figure 3 This is a schematic diagram of using a sunshade to determine the disinfection range.

[0033] Figure 4 It is a schematic diagram of the control mechanism of the purification air duct.

[0034] Figure 5 Schematic diagram of the regulatory mechanism of the modular complex.

[0035] Figure 6 It is a schematic diagram of the comprehensive function of the purification air duct and the module complex.

[0036] In the figure: 1. disinfection space, 2. first entrance and exit, 2a, second entrance and exit, 3. warning sign, 4. red warning light, 5. module complex, 6. floor disinfection area, 7. sunshade, 8. electric control device for sunshade, 9. sensing module, 10. PLC controller, 11. UV-C band low-pressure mercury lamp, 12. emergency stop button, 13. cross-flow fan, 14. HEPA filter, 15. plasma generator, 16. air outlet, 17. pedestrian flow counter. DETAILED DESCRIPTION

[0037] The present invention is described in detail below with reference to the accompanying drawings.

[0038] The low-pressure mercury lamp in the UV-C band of 254 nm, the infrared sensor, the microwave radar sensor, the low-temperature plasma generator and the HEPA filter used in the present invention are all commercially available products, and the TVOC, particulate matter and ozone sensors are integrated devices purchased from Shenzhen Yunliwuli Technology Co., Ltd.

[0039] Figures 1 to 3 A composite pollutant control system for high-risk spaces and ground is shown, which includes a purification air duct, an ultraviolet disinfection module, a photocatalytic enhancement module, a human body and pollutant sensing module, a control system module, a safety protection module and an ultraviolet reflection inhibition module, aiming to achieve all-round and intelligent composite pollutant control.

[0040] 1. Purification duct: This system is equipped with a purification duct with adjustable airflow direction at the top. The duct is equipped with a HEPA filter and a low-temperature plasma generator. The HEPA filter is installed near the air outlet, so that it can effectively filter and decompose particulate matter and TVOC. When there are many people, the system adjusts the airflow direction based on the distribution characteristics of pedestrian flow during the period, so that the air inlet of the purification duct is located on the side with more people entering the space, so as to achieve the best air purification effect. The system uses sensors to monitor ozone concentration and pedestrian flow data in real time. The constructed purification duct control mechanism is realized through PLC, and then the fan and low-temperature plasma generator are controlled to ensure energy-saving and efficient operation of the system.

[0041] 2. Ultraviolet disinfection module: The ultraviolet disinfection module is equipped with a low-pressure mercury lamp in the UV-C band, which is specially used for efficient disinfection of air and ground microorganisms. The system automatically starts the ultraviolet lamp when the pedestrian flow is discontinuous and there is no one, and controls the irradiation range of ultraviolet rays through the electric sunshade to ensure the accuracy of disinfection while reducing the impact on the surrounding environment.

[0042] 3. Photocatalytic enhancement module: To further enhance the disinfection effect, the photocatalytic enhancement module is set on the inner surface of the UV lamp's shade and coated with titanium dioxide (TiO2) photocatalytic material. Ultraviolet rays excite TiO2 to produce active oxygen species, which decompose organic pollutants in the air and enhance the disinfection effect of microorganisms.

[0043] 4. Human body and pollutant sensing module: This system has human body and pollutant sensing functions, including infrared sensors, microwave radar sensors and pollutant concentration sensors (TVOC, ozone and particulate matter sensors), which can monitor human activities and air pollution levels in real time. When the system detects a person approaching, it will automatically turn off the ultraviolet light to ensure the safety of the human body.

[0044] 5. Control system module: The control system uses a programmable logic controller (PLC) as the core unit, connecting various modules to coordinate system operation, and building a control mechanism based on pedestrian flow data characteristics and ozone concentration to ensure real-time linkage of purification, disinfection and sensing modules. The control system also integrates a delayed start program to confirm that the ultraviolet disinfection will be delayed after the person leaves, further improving safety.

[0045] 6. Safety protection module: The safety protection module includes a warning system, an emergency stop device and a delayed start mechanism. Before the UV lamp is started and during operation, the warning system sends visual and auditory signals to remind personnel to pay attention. The emergency stop device is a red emergency stop button, which is convenient for personnel to turn off the UV lamp in an emergency.

[0046] 7. Ultraviolet reflection suppression module: To prevent ultraviolet rays from causing harm to people in non-direct areas, the system sets a sunshade under the ultraviolet lamp, and at the same time, the ground is paved or coated with ultraviolet absorbing materials to reduce ultraviolet reflection and achieve safer ultraviolet disinfection operations.

[0047] The system can be installed at the entrance section of the apartment. At the top, it is composed of a purification duct and a module complex 5 (including an ultraviolet disinfection module, a photocatalytic enhancement module, an ultraviolet reflection inhibition module and a human body sensing module).

[0048] The purification air duct is opened according to the ozone and pedestrian flow status. At the same time, the direction of the cross-flow fan 13 is adjusted according to the data of people entering and leaving the pedestrian flow counter 17, so that the air inlet of the purification air duct is located on the side with more people entering the space, so as to achieve the best air purification effect.

[0049] The purification air duct can also adjust the direction of the crossflow fan so that the entrance and exit with high pedestrian flow into the space is the air inlet. When the time interval between the current pedestrian flow recording time and the previous tenth recording time at the entrance and exit on the air inlet side is less than 5 minutes, the pedestrian flow enters a dense state and the fan is turned on. The schematic diagram of the control mechanism of the purification air duct is shown in the figure. Figure 4 shown.

[0050] In addition, the low-temperature plasma generator 15 generates ozone during operation. The low-temperature plasma generator in the purification air duct is controlled according to the ozone detected by the ozone sensor. The programmable logic controller PLC10 is used as the core control unit, and its control mechanism is shown as follows:

[0051] 1. When the average ozone concentration is greater than 0.12 mg / m 3 When the low-temperature plasma device on the air inlet side is turned off;

[0052] 2. When the average ozone concentration is greater than 0.16 mg / m 3 When the temperature is too low, shut down all low-temperature plasma devices;

[0053] 3. When the average and maximum concentrations of ozone in one hour are both less than 0.16 mg / m 3 , turn on the low-temperature plasma device on the non-air inlet side;

[0054] 4. When the average concentration and maximum concentration of ozone in one hour are both less than 0.12 mg / m 3 , turn on all low-temperature plasma devices.

[0055] The module complex 5 can be turned on according to the status of pedestrian flow. The low-pressure mercury lamp 11 in the UV-C band is equipped with an openable shading cover, which is controlled by an electric device 8 for the shading cover to achieve synchronous opening and blocking of the ultraviolet lamp. The photocatalytic enhancement module is arranged on the inner surface of the shading cover 7 of the ultraviolet lamp, and a titanium dioxide (TiO2) photocatalytic material with a thickness of 0.1 mm is evenly coated. Ultraviolet rays are used to excite TiO2 to produce active oxygen, further improving the disinfection effect. In the human body and pollutant sensing module 9, the human body sensing module includes an infrared sensor and a microwave radar sensor, which are used in combination to improve the accuracy and sensitivity of detection. The particulate matter and ozone sensors are used to monitor the corresponding pollutants in this environment. The human body and pollutant sensing modules are installed at the four corners of the module complex 5, and the sensing range covers all channels that may enter the ultraviolet irradiation area to avoid detection blind spots.

[0056] The control mechanism of the module complex 5 is as follows: a programmable logic controller (PLC) 10 is used as the core control unit, and the electric control device 8 of the sunshade, the human body sensing module 9, the programmable logic controller (PLC) 10 and the low-pressure mercury lamp in the UV-C band are connected. The delay start program in the control system is set to a delay of 30 seconds. If no pedestrians pass by within 30 seconds, it is confirmed that the current state is a non-continuous state of pedestrian flow, and then the ultraviolet lamp is started, and the opening of the sunshade is controlled. After 15 minutes of disinfection, the equipment is silent for 3 hours. The schematic diagram of the control mechanism of the module complex is shown as follows Figure 5 Specifically:

[0057] a. The sensing module 9 detects whether there is someone in the environment. If someone is detected, the sensing module 9 feeds back a signal to the PLC controller 10, and the PLC controller 10 controls the low-pressure mercury lamp 11 in the UV-C band to be turned off;

[0058] b. The sensing module 9 detects whether there is anyone in the environment. If no one is detected, the sensing module 9 feeds back a signal to the PLC controller 10. The PLC controller 10 records the time for 30 seconds. If no one is detected in the environment, the PLC controller 10 controls the UV-C band low-pressure mercury lamp 11 to turn on, and controls the shading hood electric control device 8 to open the shading hood 7, and controls the warning sign 3 and the red warning light 4 to turn on;

[0059] c. Start disinfection, the sensing module 9 continues to work, and if someone is detected in the environment, it returns to step a; the PLC controller 10 records the time, and is turned on for 15 minutes continuously or 20 minutes cumulatively. When the above conditions are met, the PLC controller 10 is triggered to control the low-pressure mercury lamp 11 in the UV-C band to turn off, the light shield 7 is put away, and the warning sign 3 and the red warning light 4 are turned off;

[0060] d. Silent process: after the disinfection is finished after being turned on for 15 minutes continuously or 20 minutes cumulatively, the device is turned off and enters the silent state. In the silent state, the unit time is 30 minutes, and the system continuously monitors whether there is anyone passing by within the unit time. If someone passes by, the system will end the silent state after the 30-minute unit time ends, and enter step a; if the silent state reaches 3 hours, enter step a;

[0061] e. Emergency stop: when an unexpected situation requires shutdown, the complex 5 can be shut down based on the emergency stop device, and needs to be opened manually after closing, and then enter step a.

[0062] The PLC module coordinates the operation of each module. With the PLC controller as the core, it coordinates the purification duct and the module complex 5 to achieve efficient pollution control and the safety of human-machine coexistence. During the operation of the system, the PLC collects pedestrian flow status and ozone data in real time: (1) After the pedestrian flow enters a dense state, the purification duct fan is turned on and the airflow direction is adjusted according to the pedestrian flow direction. At the same time, the operation state of the low-temperature plasma generator in the purification duct is dynamically adjusted according to the ozone concentration level; (2) After the pedestrian flow enters a discontinuous state, the ultraviolet disinfection process is turned on. After effective disinfection is achieved while ensuring the safety of personnel, it enters a silent state. In the silent state, the pedestrian flow state is continuously monitored to carry out effective disinfection in a timely manner. At this point, the system can achieve effective operation in both dense and discontinuous states of pedestrian flow, and achieves efficient removal of pollutants in public places with complex pedestrian flows.

[0063] The safety protection module includes a warning system and an emergency stop device. The warning system consists of a warning sign 3 and a red warning light 4. It continuously sends out warning signals before the UV lamp is started and during operation to remind personnel to pay attention to safety. The emergency stop device 12 is a red emergency stop button, which is set in a conspicuous position at the entrance of the disinfection area to facilitate personnel to manually turn off the UV lamp in an emergency. A light shield is installed under the UV lamp. The light shield is made of aramid fiber so that the UV light only irradiates the target area to avoid affecting the surrounding environment. Figure 3 shown.

[0064] During installation and debugging, the device is installed at a height that is not easily accessible to personnel, so as not to affect normal traffic. According to the modular design, the power and signal lines of each module are connected, and the parameters of the control system are set, such as the delayed start time, the content display of the warning system, and the light intensity. In terms of the use effect, experiments have proved that the device can continuously disinfect high-risk spaces and floors for 15 minutes or more than 20 minutes in cumulative disinfection without human intervention, and the survival rate of microorganisms is less than 5%. The PLC control system is used to realize the intelligent control of ultraviolet lamps, automatically detect the status of pedestrian flow and the presence / absence status, automatically turn on and off the ultraviolet lamps and light shields, without manual intervention, reducing management costs, and ensure that personnel are not harmed by ultraviolet rays through multiple safety measures such as delay, emergency stop and real-time detection. Precautions include regularly checking the working status of ultraviolet lamps, the integrity of photocatalytic materials, and the sensitivity of sensors; according to the use, replace the TiO2 coating every other year to ensure the photocatalytic effect; and post eye-catching safety warning signs at the entrance of the disinfection area.

[0065] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A composite pollutant control system for high-risk spaces and ground, characterized by: The system includes a purification duct, a module complex, a safety protection module and an ultraviolet reflection suppression module; The purification air duct is installed at the top of the space, and is equipped with a HEPA filter (14) and a low-temperature plasma generator (15) in the air duct; the low-temperature plasma generator (15) generates ozone during operation, and when there is a dense flow of pedestrians, the fan is kept turned on, and the control mechanism of the low-temperature plasma device is as follows: When the average ozone concentration is greater than 0.16 mg / m 3 When the temperature is too low, shut down all low-temperature plasma devices; When the average ozone concentration is greater than 0.12 mg / m 3 And less than 0.16 mg / m 3 When the low-temperature plasma device on the air inlet side is turned off; When the average and maximum concentrations of ozone in one hour are both less than 0.16 mg / m 3 , turn on the low-temperature plasma device on the non-air inlet side; When the average and maximum concentrations of ozone in one hour are both less than 0.12 mg / m 3 , turn on all low-temperature plasma devices; The purification air duct adjusts the airflow direction according to the distribution characteristics of pedestrian flow during the time period, uses a pedestrian flow counter (17) to respectively record the number of people entering the first entrance and exit (2) and the second entrance and exit (2a), and adjusts the direction of the cross-flow fan (13) so that the entrance and exit with a high pedestrian flow entering the space is used as the air inlet; the airflow direction is adjusted according to the level of pedestrian flow at the first entrance and exit (2) and the second entrance and exit (2a); The module complex (5) comprises a PLC controller (10), a low-pressure mercury lamp (11) in the UV-C band, a sensing module (9), a light shield (7), a light shield electric control device (8), a warning sign (3), a red warning light (4), and a photocatalytic enhancement module; The PLC controller (10) is electrically connected to a UV-C band low-pressure mercury lamp (11), a sensing module (9), and a light shield electric control device (8); the UV-C band low-pressure mercury lamp (11) is used to disinfect microorganisms on the ground and in the air when pedestrian flow is discontinuous and no one is around; the photocatalytic enhancement module is located on the inner surface of the light shield (7), coated with titanium dioxide material, and generates active oxygen by stimulating photocatalytic reactions through ultraviolet rays; the sensing module (9) includes an infrared sensor, a microwave radar sensor, and a pollutant concentration sensor, and monitors the activities of people and the concentration of pollutants in the air in real time; The regulatory mechanism of the module complex (5) is: a. The sensing module (9) detects whether there is a person in the environment. If a person is detected, the sensing module (9) feeds back a signal to the PLC controller (10), and the PLC controller (10) controls the low-pressure mercury lamp (11) in the UV-C band to be turned off; b. The sensing module (9) detects whether there is anyone in the environment. If no one is detected, the sensing module (9) feeds back a signal to the PLC controller (10). The PLC controller (10) records the time for 30 seconds. If no one is detected in the environment, the PLC controller (10) controls the UV-C band low-pressure mercury lamp (11) to be turned on, and controls the shading hood electric control device (8) to open the shading hood (7), and controls the warning sign (3) and the red warning light (4) to be turned on. c. Start disinfection, the sensing module (9) continues to work, and if a person is detected in the environment, it returns to step a; The PLC controller (10) records the time, and when the device is turned on continuously for 15 minutes or turned on for 20 minutes cumulatively to reach the silent condition, the PLC controller (10) is triggered to control the UV-C band low-pressure mercury lamp (11) to be turned off, the light shield (7) is retracted, and the warning sign (3) and the red warning light (4) are turned off; d. After the silent condition is met, the device is shut down and enters the silent state. In the silent state, the unit time is 30 minutes, and the system continuously monitors whether there is anyone passing by within the unit time. If someone passes by, the system silence ends after the 30-minute unit time ends, and the process goes to step a. If no one passes by during the silent process, the process will proceed to step a after the silent state reaches 3 hours; e. Emergency stop: when an unexpected situation requires shutdown, the module complex (5) is shut down based on the emergency stop device, and needs to be manually opened after closing, and then enter step a after opening; The safety protection module comprises a delayed start mechanism, a warning system and an emergency stop device, wherein the warning system sends out visual and audible warning signals before the UV-C band low-pressure mercury lamp (11) is started and during operation, and the emergency stop button (12) is arranged at the entrance of the disinfection area and is used by personnel to manually control the shutdown of the UV-C band low-pressure mercury lamp (11); The ultraviolet reflection suppression module is formed by laying or coating a material absorbing ultraviolet rays on the ground area.

2. The complex pollutant control system according to claim 1, characterized in that: The PLC controller (10) analyzes pedestrian flow data characteristics based on the detection data of the ozone sensor and the recorded data of the pedestrian flow counter. The pedestrian flow status is determined, and the crossflow fan and low-temperature plasma generator are regulated based on the control mechanism constructed based on the pedestrian flow characteristics and ozone concentration changes.

3. The complex pollutant control system according to claim 1, characterized in that: The light shield (7) is made of aramid fiber, and the inner surface of the light shield (7) is evenly coated with titanium dioxide photocatalytic material, with a thickness of 0.1 mm.

4. The complex pollutant control system according to claim 1, characterized in that: The system also has a remote monitoring function, which allows managers to view the working status and operation of the device in real time through the Internet of Things technology.

Images