A highly integrated synchronous simulation multi-pollutant smog chamber system and working method

Abstract

The present invention discloses a highly integrated synchronous simulation multi-pollutant smog chamber system and working method, which includes a smog chamber, an outer box body, a zero air generator, a solvent release unit, a biomass combustion furnace, a coal combustion furnace, an automobile exhaust emission collection unit, a temperature control unit, a humidity control unit, a plant emission collection unit, a multi-spectrum light source and an industrial control computer. The smog chamber is a square transparent box body, and the multi-spectrum light source is located outside the smog chamber. The solvent release unit includes a vacuum storage tank and a solvent beaker. The vacuum storage tank, the biomass combustion furnace, the coal combustion furnace, the automobile exhaust emission collection unit and the plant emission collection unit are also respectively connected to the smog chamber through pipelines. The temperature control unit includes a refrigeration unit and an electric heating tube. The humidity control unit, the electric heating tube and the evaporator of the refrigeration unit are all arranged inside the smog chamber. The present invention realizes a comprehensive simulation study on various changing factors in the atmospheric environment by integrating emissions from multiple pollution sources and precisely simulating the real light conditions in the environment.

Description

Technical Field

[0001] The present invention relates to the technical field of atmospheric environment simulation, and particularly relates to a highly integrated synchronous simulation multi-pollution source smog chamber system and a working method thereof. Background Art

[0002] With the continuous acceleration of the urbanization and industrialization processes, the atmospheric environmental pollution in China has gradually evolved from a single pollutant to a complex multi-pollutant mixture state. This mixed pollution not only includes traditional particulate matters (such as PM 2.5 and PM 10 ) and gaseous pollutants (such as sulfur dioxide, nitrogen dioxide, ozone, etc.), but also involves the formation of volatile organic compounds (VOCs) and secondary pollutants. This type of compound pollution has brought new challenges to air quality management and control. In the field of environmental science and engineering, the smog chamber system is the main tool for studying and simulating the physical and chemical processes of atmospheric pollution, and is used to explore the formation, transformation and removal mechanisms of atmospheric pollutants, so as to systematically study the interactions between various pollutants and their impacts on the atmospheric composition.

[0003] As important precursors of aerosols and ozone, the behaviors and transformation processes of VOCs in the atmosphere are also affected by various environmental factors, such as photochemical reactions, temperature and humidity changes, etc. Due to the wide variety of VOCs and their different reaction activities, there are significant differences in their compositions and influences in different cities and regions. The diversity of emission sources such as vehicle exhaust, solvent use, combustion of biomass and fossil fuels, and biological emissions has brought clear challenges to source apportionment and the formulation of pollution control strategies.

[0004] The prior art is mainly limited to the simulation of a single pollution source, ignoring the interaction between different pollution sources and the combined effects of environmental factors. It is difficult to comprehensively simulate the dynamic changes of VOCs, an important precursor of secondary pollutants, under complex environmental conditions. Especially in heavy pollution weather, accurate prediction and assessment of environmental impact factors and their parameters at specific locations are still challenging. Although there are various environmental simulation devices on the market that can adjust basic environmental parameters such as temperature and humidity under relatively stable experimental conditions, when simulating the comprehensive effects of complex environmental parameters (such as meteorological conditions, light conditions, and terrain conditions) at specific locations on the behavior of VOCs, these devices show obvious limitations and ignore the variable factors in the actual atmospheric environment. The patent with publication number CN115586112A can reproduce the generation and evolution process of aerosols under various extreme meteorological conditions, but its simulation objects and environmental conditions are still limited to the laboratory and cannot achieve real-time synchronization with the actual atmospheric environment. The patent with publication number CN114917966A expands the research scope of the behavior of aerosols under different bands of light, making up for the deficiencies of traditional laboratory light source simulations. However, this technology still fails to solve the problem of synchronization with the actual atmospheric light conditions and cannot combine various complex meteorological conditions, photochemical reactions, and pollutant conversion processes for high-fidelity simulation.

[0005] Existing smog chamber systems still have many limitations in simulating complex meteorological and light conditions. First, the system lacks the ability to be linked with GIS (Geographic Information System) in real time, resulting in insufficient accuracy and lag in response when processing environmental data at specific locations, which limits the practical application of research results. Second, although the photochemical smog chamber has made progress in simulating the impact of solar radiation on atmospheric chemical processes, its control under dynamic climate changes, especially low-temperature conditions, is still insufficient, restricting the applicability of winter environmental research. Summary of the Invention

[0006] Aiming at the problems existing in the prior art, an object of the present invention is to propose a highly integrated synchronous simulation multi-pollution source smog chamber system to solve the problems of the existing smog chamber system in environmental pollution of the atmosphere, lack of real-time linkage with the GIS geographic information system, resulting in insufficient accuracy and lag in response when processing environmental data at specific locations, failure to solve the synchronization problem with the actual atmospheric light conditions, and limiting the practical application of research results.

[0007] The present invention adopts the following technical solutions:

[0008] A highly integrated synchronous simulation multi-pollutant smog chamber system, comprising a smog chamber, an outer box body, a zero-air generator, a solvent release unit, a biomass combustion furnace, a coal combustion furnace, an automobile exhaust emission collection unit, a temperature control unit, a humidity control unit, a plant emission collection unit, a multi-spectrum light source and an industrial control computer. The smog chamber is a square transparent box body, which is located inside the outer box body. The multi-spectrum light source is located outside the smog chamber, and its irradiation direction faces one side of the smog chamber.

[0009] The solvent release unit includes a vacuum storage tank and a number of solvent beakers placed inside the vacuum storage tank. The outlet ends of the zero-air generator and the vacuum storage tank are respectively connected to the smog chamber through pipelines. The biomass combustion furnace, the coal combustion furnace, the automobile exhaust emission collection unit and the plant emission collection unit are also respectively connected to the smog chamber through pipelines.

[0010] The automobile exhaust emission collection unit includes an automobile engine and an exhaust gas collection box. The exhaust port of the automobile engine is connected to the inlet pipeline of the exhaust gas collection box, and the outlet of the exhaust gas collection box is connected to the smog chamber through a pipeline.

[0011] The temperature control unit includes a refrigeration unit and an electric heating tube. The electric heating tube and the evaporator of the refrigeration unit are fixedly installed inside the smog chamber. The humidity control unit is arranged inside the smog chamber and includes a humidifier and a temperature and humidity sensor. The signal end of the temperature and humidity sensor is communicatively connected to the industrial control computer.

[0012] A pressure stabilizing valve is arranged on the side wall of the smog chamber, and a wind speed simulator is arranged inside it. In addition, an exhaust pipeline and a sampling pipeline are arranged on the side wall of the smog chamber. A first solenoid valve and a first vacuum pump are arranged on the exhaust pipeline, and a sixth solenoid valve is arranged on the sampling pipeline, and its end is connected to a detection instrument.

[0013] Furthermore, the outer box body is a square box body matching the smog chamber. A door body is installed on one side wall of it. Heat insulation layers are provided on the six inner walls of the outer box body, and reflective films are pasted on the inner walls of each heat insulation layer.

[0014] The smog chamber is fixed inside the outer box body through a bracket located below it, and its six sides are respectively arranged parallel to the six sides of the outer box body.

[0015] Furthermore, the vacuum storage tank includes a sealing cover and a tank body with an open top. The sealing cover is arranged on the top of the tank body to seal the tank body. In addition, a second vacuum pump is arranged on the sealing cover.

[0016] A first pipeline is arranged on the upper part of the vacuum storage tank. A first metering pump is arranged on the first pipeline, and its end is connected to the side wall of the smog chamber. A second solenoid valve is also arranged on the first pipeline. The second solenoid valve is located between the first metering pump and the smog chamber. The signal ends of the first metering pump and the second solenoid valve are respectively connected to the industrial control computer.

[0017] Further, a first flue gas collection box is provided on one side of the biomass combustion furnace, and the intake end of the first flue gas collection box is connected to the flue of the biomass combustion furnace through a first intake pipe.

[0018] The exhaust end of the first flue gas collection box is connected to the side wall of the smoke box through a second pipe. A second metering pump and a third solenoid valve are provided on the second pipe. The third solenoid valve is located between the second metering pump and the smoke box. The signal ends of the second metering pump and the third solenoid valve are respectively connected to the industrial control computer.

[0019] Further, a second flue gas collection box is provided on one side of the coal combustion furnace, and the intake end of the second flue gas collection box is connected to the flue of the coal combustion furnace through a second intake pipe.

[0020] The exhaust end of the second flue gas collection box is connected to the side wall of the smoke box through a third pipe. A third metering pump and a fourth solenoid valve are provided on the third pipe. The fourth solenoid valve is located between the third metering pump and the smoke box. The signal ends of the third metering pump and the fourth solenoid valve are respectively connected to the industrial control computer.

[0021] Further, the plant emission collection unit includes an airtight glass house with green plants placed inside. It is connected to the side wall of the smoke box through a fourth pipe, and a check valve leading from the airtight glass house to the smoke box is provided on the fourth pipe.

[0022] Further, the intake end of the tail gas collection box is connected to a third intake pipe, and the end of the third intake pipe is located inside the exhaust port of the vehicle engine.

[0023] The exhaust end of the tail gas collection box is connected to the side wall of the smoke box through a fifth pipe. A fourth metering pump and a fifth solenoid valve are provided on the fifth pipe. The fifth solenoid valve is located between the fourth metering pump and the smoke box. The signal ends of the fourth metering pump and the fifth solenoid valve are respectively connected to the industrial control computer.

[0024] Further, the wind speed simulator adopts an electric fan, which is installed on the inner wall of one side of the smoke box, and the signal end of the electric fan is communicatively connected to the industrial control computer.

[0025] The refrigeration unit further includes a compressor and a condenser. The compressor and the condenser are arranged outside the outer box body. The compressor and the condenser form a refrigeration cycle system with the evaporator, and the signal end of the refrigeration unit is communicatively connected to the industrial control computer.

[0026] Further, the multi-spectrum light source includes a lamp housing, a panel, an ultraviolet light emitting module, an infrared light emitting module, and a visible light emitting module. The lamp housing is a disc-shaped sealed housing, with a central hole on one side and a mode lens embedded at the hole.

[0027] The panel is fixed on the inner wall of the lamp housing on the side opposite to the mode lens. The ultraviolet light emitting module, the infrared light emitting module and the visible light emitting module are regularly arranged on the side of the panel close to the mode lens. Each light emitting module is connected to a power supply. In addition, the signal terminals of each light emitting module are communicatively connected to an industrial control computer.

[0028] Another object of the present invention is to propose a working method for a synchronous simulation multi-pollutant smog chamber system. The specific scheme content is as follows.

[0029] The working method of the synchronous simulation multi-pollutant smog chamber system adopts the above-mentioned highly integrated synchronous simulation multi-pollutant smog chamber system, and includes the following steps:

[0030] Step 1: Obtain the geographical environment data of the target experimental area within a set time period through the GIS system. The environmental parameters include temperature, light intensity, wind speed and humidity parameters for a certain time period, and input the geographical environment data into the industrial control computer.

[0031] Place green plants in the plant emission collection unit. Before the experiment starts, the green plants are kept in the plant emission collection unit for at least 24 hours.

[0032] The zero gas generator starts to work, and the exhaust gas pipeline is opened to discharge the gas in the smog chamber. After the smog chamber is filled with zero gas, the exhaust gas pipeline is closed, and the zero gas generator stops supplying gas to the smog chamber.

[0033] Step 2: Determine the types of solvents used. Open the lid of the vacuum storage tank, add the corresponding solvents to each solvent beaker respectively, and then close the lid of the vacuum storage tank.

[0034] Start the car engine. After the exhaust state of the car engine is stable, the exhaust gas collection box collects the car exhaust gas and stores it for standby.

[0035] Add biomass fuel and coal to the biomass combustion furnace and the coal combustion furnace respectively and ignite them, and collect the flue gas generated by the substance combustion furnace and the coal combustion furnace respectively.

[0036] Step 3: Pump the volatile gas in the vacuum storage tank into the smog chamber, pump the collected car exhaust gas and the flue gas generated by the substance combustion furnace and the coal combustion furnace into the smog chamber respectively. At the same time, pump the gas in the plant emission collection unit into the smog chamber. Then, disconnect the gas supply to the smog chamber.

[0037] Step 4: Turn on the multi-spectrum light source and irradiate the smoke. During the irradiation process, the industrial control computer adjusts the change of the light intensity of the multi-spectrum light source according to the geographical environment data.

[0038] Turn on the electric fan and the temperature and humidity sensor. The temperature and humidity sensor monitors the temperature and humidity data inside the smoke chamber in real time and sends it to the industrial control computer. The industrial control computer controls the working states of the electric heating tube, the refrigeration unit, the humidifier and the electric fan according to the temperature and humidity data, so that the temperature, light intensity, wind speed and humidity parameters inside the smoke chamber are consistent with the geographical environment data of the target experimental area.

[0039] Step Five, after a set time, the sampling pipeline is opened, and the gas inside the smoke chamber enters the on-line monitoring instrument through the sampling pipeline to detect the components of the sampled gas.

[0040] After that, turn on the zero gas generator and open the exhaust pipeline to exhaust the gas inside the smoke chamber.

[0041] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: By integrating multiple emission systems, including solvent release, biomass and coal combustion, vehicle simulation and biological emission collection, etc., the present invention realizes the comprehensive simulation of VOC emissions from natural sources and anthropogenic sources. This method comprehensively considers the interaction between different pollution sources and the combined influence of environmental factors, so as to more accurately simulate the emission and diffusion of VOCs in the actual environment, and precisely reproduce the pollution dynamics in the complex environment, providing a scientific basis for formulating effective pollution control strategies. Through an efficient refrigeration unit and environmental control system, it is ensured that the temperature, humidity and wind speed inside the chamber can be accurately adjusted to the required state, realizing precise control of the temperature, humidity and wind speed inside the environmental simulation chamber. This system integrates an advanced environmental parameter control system and is connected to an external computer integrated control system, and can receive and process the location information from a specific location in real time based on the environmental parameters of the Geographic Information System (GIS). The intelligent algorithm in the system can automatically adjust the environmental conditions inside the smoke chamber according to the received location information, and precisely simulate the actual pollution conditions in different geographical regions. In this way, the present invention can realize the high-fidelity simulation of a multi-pollution-source smoke chamber system in a complex environment and provide important technical support for environmental monitoring and pollution control research. The multi-spectrum light source has the ability of precise light simulation. By analyzing GIS data, it dynamically controls the brightness output of each light-emitting module. Each light-emitting module uses pulse width modulation technology to emit light independently or in combination, and adjusts the proportion of different spectral components. The mode lens focuses and changes the light incident angle by adjusting the shape or position, realizing the precise simulation of light conditions at different times and in different environments, and meeting the complex experimental requirements. Description of the Drawings

[0042] Figure 1 is a schematic structural diagram of a highly integrated synchronous simulation multi-pollution-source smoke chamber system of the present invention.

[0043] Figure 2 is a schematic structural diagram of a part of the present invention, showing the multi-spectrum light source and the industrial control computer. Detailed implementation manners

[0044] The following further describes the detailed implementation manners of the present invention in conjunction with the accompanying drawings and specific embodiments:

[0045] Embodiment 1, in combination with Figure 1 and Figure 2 , a highly integrated synchronous simulation multi-pollutant smog chamber system, including a smog chamber 1, an outer box body 11, a zero gas generator 2, a solvent release unit, a biomass combustion furnace 3, a coal combustion furnace 4, an automobile exhaust emission collection unit, a temperature control unit, a humidity control unit, a plant emission collection unit, a multi-spectrum light source 5 and an industrial control computer 6. The smog chamber 1 is a square transparent box body, which is located inside the outer box body 11. The outer box body 11 is a square box body matching the smog chamber 1. A door body is installed on one side wall of it. Heat preservation layers are provided on the six inner walls of the outer box body 11, and reflective films are pasted on the inner walls of each heat preservation layer.

[0046] The smog chamber 1 is fixed in the outer box body 11 through a bracket located below it, and its six sides are respectively arranged parallel to the six sides of the outer box body 11. In addition, an exhaust pipe 12 and a sampling pipe 13 are provided on the side wall of the smog chamber 1. A first solenoid valve 121 and a first vacuum pump 122 are provided on the exhaust pipe 12. A sixth solenoid valve 131 is provided on the sampling pipe 13, and its end can be connected to a detection instrument.

[0047] The multi-spectrum light source 5 is located outside the smog chamber 1, and its irradiation direction faces one side of the smog chamber 1. Specifically, the multi-spectrum light source 5 includes a lamp housing 51, a panel 52, an ultraviolet light emitting module, an infrared light emitting module and a visible light emitting module. The lamp housing 51 is a disc-shaped sealed housing, and a mode lens 53 is embedded at the center of one side of it with an opening.

[0048] The panel 52 is fixed on the side of the inner wall of the lamp housing 51 opposite to the mode lens 53. The ultraviolet light emitting module, the infrared light emitting module and the visible light emitting module are regularly arranged on the side of the panel 52 close to the mode lens 53. Each light emitting module is connected to a power supply, and the signal terminals of each light emitting module are in communication connection with the industrial control computer. The industrial control computer controls the light emitting intensity of each light emitting module according to the change of the light intensity of the geographical environment data obtained through the GIS system, so that the parallel light rays emitted by the multi-spectrum light source 5 passing through the mode lens 53 are consistent with the light conditions in this area.

[0049] The solvent release unit includes a vacuum storage tank 61 and several solvent beakers 62 placed inside the vacuum storage tank 61. Each solvent beaker 62 contains a different solvent, such as acetone, toluene, etc. The zero gas generator 2 and the outlet end of the vacuum storage tank 61 are respectively connected to the smoke chamber 1 through pipelines. The vacuum storage tank 61 includes a sealing cover and a tank body with an open top. The sealing cover is set on the top of the tank body to seal the tank body. In addition, a second vacuum pump 611 is provided on the sealing cover. After the solvent is put into the vacuum storage tank 61 and sealed through the sealing cover, the vacuum storage tank 61 can be evacuated by the second vacuum pump 611 to accelerate the volatilization of the solvent, so that the organic solvents volatilized from the solvent quickly fill the vacuum storage tank 61.

[0050] A first pipeline 63 is provided at the upper part of the vacuum storage tank 61. A first metering pump 64 is provided on the first pipeline 63, and its end is connected to the side wall of the smoke chamber 1. A second solenoid valve 65 is also provided on the first pipeline 63. The second solenoid valve 65 is located between the first metering pump 64 and the smoke chamber 1. The signal ends of the first metering pump 64 and the second solenoid valve 65 are respectively connected to the industrial control computer 6.

[0051] The biomass combustion furnace 3, the coal combustion furnace 4, the vehicle exhaust emission collection unit and the plant emission collection unit are also respectively connected to the smoke chamber 1 through pipelines. Specifically, a first flue gas collection box 31 is provided on one side of the biomass combustion furnace 3. The intake end of the first flue gas collection box 31 is connected to the flue of the biomass combustion furnace 3 through a first intake pipe 32. The first flue gas collection box 31 collects and stores the flue gas generated by the biomass combustion furnace 3. The flue gas in the first flue gas collection box 31 keeps the same concentration and enters the smoke chamber 1 at a constant concentration.

[0052] The exhaust end of the first flue gas collection box 31 is connected to the side wall of the smoke chamber 1 through a second pipeline 33. A second metering pump 34 and a third solenoid valve 35 are provided on the second pipeline 33. The third solenoid valve 35 is located between the second metering pump 34 and the smoke chamber 1. The signal ends of the second metering pump 34 and the third solenoid valve 35 are respectively connected to the industrial control computer 6.

[0053] A second flue gas collection box 41 is provided on one side of the coal combustion furnace 4. The intake end of the second flue gas collection box 41 is connected to the flue of the coal combustion furnace 4 through a second intake pipe 42. The second flue gas collection box 41 collects and stores the flue gas generated by the coal combustion furnace 4. The flue gas in the second flue gas collection box 41 keeps the same concentration and enters the smoke chamber 1 at a constant concentration.

[0054] The exhaust end of the second flue gas collection box 41 is connected to the side wall of the smoke chamber 1 through a third pipeline 43. A third metering pump 44 and a fourth solenoid valve 45 are provided on the third pipeline 43. The fourth solenoid valve 45 is located between the third metering pump 44 and the smoke chamber 1. The signal ends of the third metering pump 44 and the fourth solenoid valve 45 are respectively connected to the industrial control computer 6.

[0055] The plant emission collection unit includes a sealed glass house 7, in which green plants are placed. It is connected to the side wall of the smog chamber 1 through a fourth pipeline 71, and a check valve 72 leading from the sealed glass house 7 to the smog chamber 1 is provided on the fourth pipeline 71.

[0056] The vehicle exhaust emission collection unit includes a vehicle engine 8 and an exhaust gas collection tank 81. The exhaust port of the vehicle engine 8 is connected to the inlet pipeline of the exhaust gas collection tank 81, and the outlet of the exhaust gas collection tank 81 is connected to the smog chamber 1 through a pipeline. The intake end of the exhaust gas collection tank 81 is connected with a third intake pipe 82, and the end of the third intake pipe 82 is located inside the exhaust port of the vehicle engine 8. The exhaust gas collection tank 81 collects and stores the exhaust gas generated by the vehicle engine 8, and the exhaust gas in the exhaust gas collection tank 81 keeps the same concentration, so that the exhaust gas enters the smog chamber 1 at a constant concentration.

[0057] The exhaust end of the exhaust gas collection tank 81 is connected to the side wall of the smog chamber 1 through a fifth pipeline 83. A fourth metering pump 84 and a fifth solenoid valve 85 are provided on the fifth pipeline 83. The fifth solenoid valve 85 is located between the fourth metering pump 84 and the smog chamber 1. The signal ends of the fourth metering pump 84 and the fifth solenoid valve 85 are respectively connected to the industrial control computer 6.

[0058] A pressure stabilizing valve is provided on the side wall of the smog chamber 1. An air speed simulator is arranged inside the smog chamber 1. The air speed simulator adopts an electric fan 91, which is installed on one inner wall of the smog chamber 1. The signal end of the electric fan is in communication connection with the industrial control computer. The industrial control computer controls the rotation speed of the electric fan 91 to simulate the gas flow speed inside the smog chamber 1 and keep it consistent with the wind speed of the external atmospheric environment.

[0059] The temperature control unit includes a refrigeration unit and an electric heating tube 92. The electric heating tube 92 and the evaporator of the refrigeration unit are fixedly installed inside the smog chamber 1. The working state of the electric heating tube 92 is automatically controlled by the industrial control computer. The refrigeration unit also includes a compressor and a condenser. The compressor and the condenser are arranged outside the outer box 11. The compressor and the condenser form a refrigeration cycle system with the evaporator. The signal end of the refrigeration unit is in communication connection with the industrial control computer. The industrial control computer controls the working state of the refrigeration unit according to the temperature data inside the smog chamber 1 collected by the temperature and humidity sensor 94.

[0060] The humidity control unit is arranged inside the smog chamber 1 and includes a humidifier 93 and a temperature and humidity sensor 94. The signal terminal of the temperature and humidity sensor 94 is communicatively connected to the industrial control computer 6. The temperature and humidity sensor 94 collects the temperature data and humidity data inside the smog chamber 1 in real time and sends them to the industrial control computer 6. The industrial control computer 6 controls the working states of the refrigeration unit, the electric heating tube 92 and the humidifier 93 according to the geographical environment data obtained through the GIS system, so that the temperature and humidity inside the smog chamber 1 are consistent with the geographical environment data.

[0061] Example 2, in combination with Figure 1 and Figure 2 , a working method of a synchronous simulation multi-pollution source smog chamber system. This method uses a highly integrated synchronous simulation multi-pollution source smog chamber system described in Example 1 and includes the following steps:

[0062] Step 1: Obtain the geographical environment data of the target experimental area within a set time period through the GIS system. The environmental parameters include the temperature, light intensity, wind speed and humidity parameters in a certain time period, and input the geographical environment data into the industrial control computer 6.

[0063] Place green plants in the plant emission collection unit. Before the experiment starts, the green plants are kept in the plant emission collection unit for at least 24 hours.

[0064] The zero-air generator 2 starts to work, and the exhaust pipe 12 is opened to discharge the gas in the smog chamber 1. After the smog chamber 1 is filled with zero air, the exhaust pipe 12 is closed, and the zero-air generator 2 stops supplying gas to the smog chamber 1.

[0065] Step 2: Determine the types of solvents used. Open the lid of the vacuum storage tank 61, add the corresponding solvents to each solvent beaker 62 respectively, and then close the lid of the vacuum storage tank 61. The types of solvents are determined according to the requirements of the simulation experiment, and each type of solvent is placed in a solvent beaker 62.

[0066] Start the vehicle engine 8. After the exhaust state of the vehicle engine 8 is stable, the tail gas collection box 81 collects the vehicle exhaust gas and stores it for standby.

[0067] Add biomass fuel and coal to the biomass combustion furnace 3 and the coal combustion furnace 4 respectively and ignite them, and collect the flue gas generated by the substance combustion furnace and the coal combustion furnace 4 respectively.

[0068] Step 3: Pump the volatile gas in the vacuum storage tank 61 into the smog chamber 1, pump the collected vehicle exhaust gas and the flue gas generated by the substance combustion furnace and the coal combustion furnace 4 into the smog chamber 1 respectively. At the same time, pump the gas in the plant emission collection unit into the smog chamber 1. After that, disconnect the gas supply to the smog chamber 1.

[0069] Step 4: Turn on the multi-spectrum light source 5 to irradiate the smoke. During the irradiation process, the industrial control computer 6 adjusts the light intensity change of the multi-spectrum light source 5 according to the geographical environment data.

[0070] Turn on the electric fan 91 and the temperature and humidity sensor 94. The temperature and humidity sensor 94 monitors the temperature and humidity data inside the smoke chamber 1 in real time and sends them to the industrial control computer 6. The industrial control computer 6 controls the working states of the electric heating tube 92, the refrigeration unit, the humidifier 93 and the electric fan 91 according to the temperature and humidity data, so that the temperature, light intensity, wind speed and humidity parameters inside the smoke chamber 1 are consistent with the geographical environment data of the target experimental area.

[0071] Step 5: After a set time, the sampling pipeline 13 is opened, and the gas inside the smoke chamber 1 enters the on-line monitoring instrument through the sampling pipeline 13 to detect the components of the sampled gas. Then, turn on the zero gas generator 2 and open the exhaust pipeline 12 to exhaust the gas inside the smoke chamber 1 completely.

[0072] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A highly integrated synchronous simulation multi-pollutant smog chamber system, characterized in that, It includes a smog chamber, an outer box body, a zero-air generator, a solvent release unit, a biomass combustion furnace, a coal combustion furnace, an automobile exhaust emission collection unit, a temperature control unit, a humidity control unit, a plant emission collection unit, a multi-spectrum light source, an industrial control computer and a GIS system. The smog chamber is a square transparent box body, which is located inside the outer box body. The multi-spectrum light source is located outside the smog chamber, and its irradiation direction faces one side of the smog chamber; The solvent release unit includes a vacuum storage tank and several solvent beakers placed inside the vacuum storage tank. The outlet ends of the zero-air generator and the vacuum storage tank are respectively connected to the smog chamber through pipelines. The biomass combustion furnace, the coal combustion furnace, the automobile exhaust emission collection unit and the plant emission collection unit are also respectively connected to the smog chamber through pipelines; The automobile exhaust emission collection unit includes an automobile engine and an exhaust gas collection box. The exhaust port of the automobile engine is connected to the inlet pipeline of the exhaust gas collection box, and the outlet of the exhaust gas collection box is connected to the smog chamber through a pipeline; The temperature control unit includes a refrigeration unit and an electric heating pipe. The electric heating pipe and the evaporator of the refrigeration unit are fixedly installed inside the smog chamber. The humidity control unit is arranged inside the smog chamber and includes a humidifier and a temperature and humidity sensor. The signal end of the temperature and humidity sensor is communicatively connected to the industrial control computer; A pressure stabilizing valve is arranged on the side wall of the smog chamber, and a wind speed simulator is arranged inside it. In addition, an exhaust pipeline and a sampling pipeline are arranged on the side wall of the smog chamber. A first solenoid valve and a first vacuum pump are arranged on the exhaust pipeline, and a sixth solenoid valve is arranged on the sampling pipeline, and its end is connected to a detection instrument; The plant emission collection unit includes an airtight glass house, in which green plants are placed and are connected to the side wall of the smog chamber through a fourth pipeline. A check valve leading from the airtight glass house to the smog chamber is arranged on the fourth pipeline; The intake end of the exhaust gas collection box is connected to a third intake pipe, and the end of the third intake pipe is located inside the exhaust port of the automobile engine; The exhaust end of the exhaust gas collection box is connected to the side wall of the smog chamber through a fifth pipeline. A fourth metering pump and a fifth solenoid valve are arranged on the fifth pipeline. The fifth solenoid valve is located between the fourth metering pump and the smog chamber. The signal ends of the fourth metering pump and the fifth solenoid valve are respectively connected to the industrial control computer; The wind speed simulator uses an electric fan, which is installed on one inner wall of the smog chamber. The signal end of the electric fan is communicatively connected to the industrial control computer; The multi-spectrum light source includes a lamp housing, a panel, an ultraviolet light emitting module, an infrared light emitting module and a visible light emitting module. The lamp housing is a disc-shaped sealed housing, with a central hole on one side and a mode lens embedded at the hole; The panel is fixed on the side of the inner wall of the lamp housing opposite to the mode lens. The ultraviolet light emitting module, the infrared light emitting module and the visible light emitting module are regularly arranged on the side of the panel close to the mode lens. Each light emitting module is connected to a power supply, and the signal end of each light emitting module is communicatively connected to the industrial control computer; Geographical environment data of the target experimental area within a set time period is obtained through the GIS system and input into the industrial control computer.

2. The highly integrated synchronous simulation multi-pollutant smog chamber system according to claim 1, characterized in that, The outer box body is a square box body that matches the smog chamber. A door is installed on one side wall of the outer box body. Heat insulation layers are provided on the six inner walls of the outer box body, and reflective films are pasted on the inner walls of each heat insulation layer. The smog chamber is fixed in the outer box body through a bracket located below it, and its six sides are respectively arranged parallel to the six sides of the outer box body.

3. The highly integrated synchronous simulation multi-pollutant smog chamber system according to claim 1, characterized in that The vacuum storage tank includes a sealing cover and a tank body with an open top. The sealing cover is arranged on the top of the tank body to seal the tank body. In addition, a second vacuum pump is provided on the sealing cover. A first pipeline is provided at the upper part of the vacuum storage tank. A first metering pump is provided on the first pipeline, and its end is connected to the side wall of the smog chamber. A second solenoid valve is also provided on the first pipeline. The second solenoid valve is located between the first metering pump and the smog chamber. The signal ends of the first metering pump and the second solenoid valve are respectively connected to the industrial control computer.

4. The highly integrated synchronous simulation multi-pollutant smog chamber system according to claim 1, characterized in that, A first flue gas collection box is provided on one side of the biomass combustion furnace. The intake end of the first flue gas collection box is connected to the flue of the biomass combustion furnace through a first intake pipe. The exhaust end of the first flue gas collection box is connected to the side wall of the smog chamber through a second pipeline. A second metering pump and a third solenoid valve are provided on the second pipeline. The third solenoid valve is located between the second metering pump and the smog chamber. The signal ends of the second metering pump and the third solenoid valve are respectively connected to the industrial control computer.

5. A highly integrated synchronous simulation multi-pollutant smog chamber system according to claim 1, characterized in that, A second flue gas collection box is provided on one side of the coal combustion furnace. The intake end of the second flue gas collection box is connected to the flue of the coal combustion furnace through a second intake pipe. The exhaust end of the second flue gas collection box is connected to the side wall of the smog chamber through a third pipeline. A third metering pump and a fourth solenoid valve are provided on the third pipeline. The fourth solenoid valve is located between the third metering pump and the smog chamber. The signal ends of the third metering pump and the fourth solenoid valve are respectively connected to the industrial control computer.

6. The highly integrated synchronous simulation multi-pollutant smog chamber system according to claim 1, wherein The refrigeration unit further includes a compressor and a condenser. The compressor and the condenser are arranged outside the outer box body. The compressor and the condenser form a refrigeration cycle system with the evaporator. The signal end of the refrigeration unit is communicatively connected to the industrial control computer.

7. The working method of a synchronous simulation multi-pollutant smog chamber system, characterized in that, Adopt a highly integrated synchronous simulation multi-pollutant smog chamber system as described in any one of claims 1 to 6, including the following steps: Step 1, obtain the geographical environment data of the target experimental area within a set time period through the GIS system. The environmental parameters include temperature, light intensity, wind speed, and humidity parameters for a certain time period, and input the geographical environment data into the industrial control computer. Place green plants in the plant emission collection unit. Before the experiment starts, the green plants are kept in the plant emission collection unit for at least 24 hours. The zero gas generator starts to work, and the exhaust pipeline is opened to discharge the gas in the smog chamber. After the smog chamber is filled with zero gas, the exhaust pipeline is closed, and the zero gas generator stops supplying gas to the smog chamber. Step 2, determine the types of solvents used. Open the cover of the vacuum storage tank, add the corresponding solvents to each solvent beaker respectively, and then close the cover of the vacuum storage tank. Start the automobile engine. After the exhaust state of the automobile engine is stable, the tail gas collection box collects the automobile tail gas and stores it for standby. Add biomass fuel and coal to the biomass combustion furnace and the coal combustion furnace respectively and ignite them, and collect the flue gas generated by the biomass combustion furnace and the coal combustion furnace respectively. Step 3: Pump the volatile gas in the vacuum storage tank into the smog chamber, and pump the collected vehicle exhaust gas and the flue gas generated by the substance combustion furnace and the coal combustion furnace into the smog chamber respectively. At the same time, pump the gas in the plant emission collection unit into the smog chamber. Then, disconnect the gas supply to the smog chamber. Step 4: Turn on the multi-spectral light source and irradiate the smog. During the irradiation process, the industrial control computer adjusts the light intensity change of the multi-spectral light source according to the geographical environment data. Turn on the electric fan and the temperature and humidity sensor. The temperature and humidity sensor monitors the temperature and humidity data in the smog chamber in real time and sends them to the industrial control computer. The industrial control computer controls the working states of the electric heating tube, the refrigeration unit, the humidifier and the electric fan according to the temperature and humidity data, so that the temperature, light intensity, wind speed and humidity parameters in the smog chamber are consistent with the geographical environment data of the target experimental area. Step 5: After a set time, the sampling pipeline is opened, and the gas in the smog chamber enters the on-line monitoring instrument through the sampling pipeline to detect the components of the sampled gas. After that, turn on the zero gas generator and open the exhaust pipeline to discharge the gas in the smog chamber.

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