VOCs emission flux infrared remote sensing monitoring system based on vertical wind field data and monitoring method thereof

Abstract

The invention discloses a VOCs emission flux infrared remote sensing monitoring system based on vertical wind field data and a monitoring method thereof, and relates to the field of atmospheric environment monitoring and optical remote sensing. According to the invention, the volume concentration and the column concentration of the same measured component are combined to obtain the height of the monitored emission smoke plume, and the vertical wind field data is obtained by using the vertical wind field measurement device, so that the error in the emission flux measurement process is reduced. Meanwhile, the ratio of the column concentration to the volume concentration of the same component, which is measured by the infrared daily-masked flux system and the mobile air extraction type Fourier transform infrared spectrum system, is combined, so that the volume concentration of the component (such as aromatic volatile organic compounds), which is not monitored by the single infrared daily-masked flux system, can be converted into corresponding emission flux; and the monitoring range of the prior art is widened. Therefore, the monitoring system and the monitoring method have important significance for quantizing multi-point source and unorganized source emission.

Description

Technical Field

[0001] The present invention relates to the field of atmospheric environment monitoring and optical remote sensing, and in particular to a VOCs emission flux infrared remote sensing monitoring system based on vertical wind field data and a monitoring method thereof. Background Art

[0002] Industrial emissions are an important source of VOCs (volatile organic compounds) emissions in my country. Taking the Yangtze River Delta region as an example, industrial sources account for more than 60% of anthropogenic sources. The total VOCs emissions can be divided into organized emissions and unorganized emissions according to the emission mode. Unorganized emissions account for more than 60% of my country's industrial VOCs emissions. Therefore, the estimation of unorganized VOCs emissions in industrial parks is the focus of VOCs emissions control in industrial parks. my country has a relatively mature system and monitoring standards for the monitoring of organized VOCs emissions; but for unorganized emissions, the main methods for online monitoring of unorganized VOCs emissions in industrial parks specified in my country's current regulations are: gas chromatography flame ionization monitor (GC-FID) and gas chromatography-mass spectrometry (GC-MS). However, the above technologies can only monitor the concentration of VOCs components at a single site, and cannot directly monitor the emission flux of VOCs from multiple point sources and unorganized sources. Therefore, new monitoring methods are urgently needed to quantify the larger proportion of multiple point sources and unorganized sources.

[0003] The wind speed used for flux calculation should be the average speed of the measured gas, but spectral measurement does not provide information about the vertical distribution of the gas, so wind field uncertainty is the largest source of error in the inversion of volatile organic compound emission flux. In order to obtain vertical wind field data, vertical wind field measurement devices are used for measurement, including but not limited to meteorological wind poles, near-ground meteorological stations, GPS radiosondes, and wind profile radars. Among them, the main function of the meteorological wind pole is to install various meteorological sensors, including anemometers, wind vanes, etc., to measure wind speed and wind direction information at different heights near the ground. Its advantage is that it can provide relatively stable and continuous near-ground wind field information and provide basic wind field data. The data from near-ground meteorological stations has high accuracy and reliability, and can also be combined with other meteorological elements, such as temperature, humidity, and air pressure, to comprehensively analyze the impact of the atmospheric environment on the wind field. The GPS radiosonde is mainly launched from the ground into the atmosphere by a large helium balloon. During the flight, the radiosonde can transmit its own GPS position information and other measurement data to the ground receiver in real time, thereby fully recording the vertical wind field information. Since balloons and radiosondes move along the local horizontal wind field in the atmosphere, by deeply analyzing the change of the horizontal position of the radiosonde over time, the height profile of the wind speed can be accurately reconstructed. Wind profiler radar can provide continuous wind profile data from near the ground to higher altitudes. Its detection height can vary depending on the performance and settings of the radar, generally reaching several thousand meters or even higher. Wind profiler radar has high temporal resolution and spatial resolution, and can quickly and accurately monitor the dynamic changes of the wind field. By combining the above vertical wind field measurement devices, a vertical profile of vector wind speed and wind direction can be established to improve the accuracy of wind field measurement.

[0004] In the prior art, a Chinese patent with publication number CN101 694461A discloses a method and system for infrared multi-component monitoring of gas emission flux from a pollution source, which includes a movable platform, a solar tracker is arranged on the movable platform, an infrared spectrometer is arranged in front of the light outlet of the solar tracker, the output end of the infrared spectrometer is connected to a computer, and a GPS locator is also arranged on the movable platform, and the GPS locator is connected to the corresponding input end of the computer.

[0005] Although the above patent can measure the emission flux of pollutant components, it cannot measure the volume concentration of the components, and it is difficult to obtain the corresponding emission plume height. At the same time, the measurement of wind speed and direction is mainly near-ground data, and it is impossible to obtain the vector wind speed and wind direction from the ground to the emission plume. Therefore, there will be large errors in the emission flux measurement process. At the same time, the number of volatile organic compound components measured by a single system is limited, and multiple systems can broaden the scope of application of this monitoring method. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an infrared remote sensing monitoring method and system for volatile organic compound emission flux from industrial sources based on vertical wind field data, to make up for the shortcomings of conventional methods for measuring gas emissions from pollution sources, and to provide a mobile, fast and simple volatile organic compound emission flux monitoring method and system that has higher measurement accuracy and can measure more components.

[0007] The wind speed used for flux calculation should be the average speed of the measured gas, but spectral measurement does not provide information about the vertical distribution of the gas, so wind field uncertainty is the largest source of error in the inversion of volatile organic compound emission flux. Since the wind and the gas in the emission plume are not measured at the same place or at the same time, the measured results may not represent the wind speed in the plume. At the same time, conventional near-ground wind speed and direction instruments are difficult to effectively monitor the wind speed and direction at high altitudes. Therefore, more complete vertical wind field measurement instruments are needed. Through continuous measurement, vertical profiles of vector wind speed and direction can be established to improve the accuracy of wind field measurements.

[0008] To solve the above problems, the technical solution of the present invention is:

[0009] The present invention provides a VOCs emission flux infrared remote sensing monitoring system based on vertical wind field data, comprising a mobile platform, an infrared solar occultation flux system is provided on the mobile platform, the infrared solar occultation flux system is used to measure the mid-infrared absorption spectrum of the volatile organic compound column concentration, the infrared solar occultation flux system comprises a solar tracker and a mid-infrared Fourier transform spectrometer corresponding to the light outlet of the solar tracker, and the mobile platform is also provided with:

[0010] A mobile air-pumping Fourier transform infrared spectrometer system is used to measure the volume concentration of volatile organic compounds, comprising an infrared light source, a long optical path absorption cell, a gas pump and a mid-infrared spectrometer, wherein the gas pump extracts plume air into the long optical path absorption cell, and the long optical path absorption cell is used to reflect the infrared light emitted by the infrared light source multiple times and send it to the mid-infrared spectrometer; the mid-infrared spectrometer monitors and analyzes the plume air components and obtains the volume concentration of the components to be measured;

[0011] Vertical wind field measurement device, used to continuously measure wind speed and direction and obtain vertical wind field data;

[0012] A positioning device is used to obtain longitude and latitude information.

[0013] Preferably, the solar tracker is an imaging feedback solar tracker;

[0014] The positioning device is a positioning device based on the GPS positioning system or the Beidou positioning system.

[0015] Furthermore, the VOCs emission flux infrared remote sensing monitoring system also includes a computing unit for analyzing data, and the computing unit is used to complete the following steps:

[0016] (1) receiving monitoring data from the mid-infrared Fourier transform spectrometer, extracting the gas standard absorption cross section, and obtaining the column concentration of the component to be measured based on nonlinear least squares inversion;

[0017] (2) The column concentration of the component measured by the infrared occultation flux system and the volume concentration of the same component obtained by the mobile extraction Fourier transform infrared spectroscopy system are combined to estimate the factory emission plume height; the vertical wind field data from the near ground to the emission plume height at the location are obtained by the vertical wind field measurement device, and the average vector wind speed during the measurement process is obtained by real-time measurement along the measurement path;

[0018] (3) Integrate the column concentration obtained in step (1) along the travel path of the mobile platform in combination with the longitude and latitude information obtained by the positioning device, and then multiply the result by the average vector wind speed obtained in step (2) to obtain the total emission flux under the monitoring path.

[0019] The infrared occultation flux system uses an imaging feedback solar tracker to track the light path that is not vertically introduced into the mid-infrared Fourier transform spectrometer. There is a certain angle between the sunlight and the ground. Therefore, the computer can calculate the solar zenith angle β according to the laws of astrophysics, and then combine the oblique column concentration c (mg / m 2 The vertical column concentration C (mg / m 2 ).

[0020] That is, in step (1), if the light path tracked by the solar tracker is not vertically introduced into the mid-infrared Fourier transform spectrometer, the solar zenith angle is calculated according to the laws of astrophysics, and the column concentration is the vertical column concentration of the component to be measured obtained by multiplying the oblique column concentration of the component to be measured by the cosine value of the solar zenith angle based on the inversion of the nonlinear least squares method.

[0021] The mobile air extraction Fourier transform infrared spectrometer system introduces plume air into the sampling port through a Teflon tube, and then extracts the plume air into a long optical path absorption cell through a gas pump. The long optical path absorption cell is used to reflect infrared light multiple times and send it into a mid-infrared spectrometer. The total optical path of the long optical path absorption cell is greater than 100m. The mid-infrared spectrometer analyzes and obtains the infrared absorption spectrum of volatile organic compounds in the plume air components. The obtained data is transmitted to a computer for processing, and the infrared absorption spectrum can be analyzed to obtain the volume concentration ρ (mg / m 3 ).

[0022] Furthermore, in step (2), the mobile platform travels along the measurement path, and the vertical column concentration C (mg / m 2 ) The ground volume concentration of the same component measured by the mobile vacuum Fourier transform infrared spectroscopy system (mg / m 3 ), and then integrate along the measurement path to obtain the factory emission plume height H at the measurement time. The calculation formula of the factory emission plume height is:

[0023]

[0024] Where H is the height of the factory discharge plume, in meters; C (x) is the column concentration in mg / m 2 ρ (x) is the volume concentration in mg / m 3 ; x is the path traveled by the mobile platform, in meters.

[0025] Based on the measured plume height H, a suitable averaging interval is selected. The real-time vertical wind field data within the interval at the location is measured by the vertical wind field measuring device. The vector average calculation of the vertical wind field data within each time period is performed in turn according to the time resolution to obtain the final average vector wind speed v.

[0026] In step (3), the calculation formula of the total emission flux is:

[0027]

[0028] Wherein, m is the total emission flux, in kg / h; v is the average vector wind speed, the moving direction of the mobile platform and the vertical direction form a plane, the angle between the normal of the plane and the wind direction is α, x is the moving path of the mobile platform, in m, x1 is the starting point of the moving path, and x2 is the end point of the moving path.

[0029] In the infrared remote sensing monitoring system for VOCs emission flux of the present invention, the calculation unit is also used to complete the following steps: combining the ratio of the column concentration and volume concentration of the same component measured by the infrared occultation flux system in step (1) and the mobile pumping Fourier transform infrared spectroscopy system in step (2), and converting the volume concentration of the component that cannot be monitored by the single infrared occultation flux system into the emission flux according to step (3). Specifically, the calculation formula for the volume concentration of the component that cannot be monitored is:

[0030]

[0031] Where c2 is the column concentration of the component that cannot be monitored, in mg / m 2 ; ρ2 is the volume concentration of the component that cannot be monitored, in mg / m3 ; c1 is the column concentration of the component to be measured, in mg / m 2 ; ρ1 is the volume concentration of the component to be tested, in mg / m 3 .

[0032] The present invention also provides a VOCs emission flux infrared remote sensing monitoring method, which uses the VOCs emission flux infrared remote sensing monitoring system for monitoring.

[0033] Compared with the prior art, the present invention is beneficial in that:

[0034] The present invention combines the volume concentration and column concentration of the same component to obtain the monitored emission plume height, and uses a vertical wind field measurement device to obtain vertical wind field data, thereby reducing the error in the emission flux measurement process. At the same time, by combining the ratio of the column concentration and volume concentration of the same component measured by the infrared occultation flux system and the mobile exhaust Fourier transform infrared spectroscopy system, the volume concentration of the component (such as aromatic volatile organic compounds) that cannot be monitored by a single infrared occultation flux system can be converted into the corresponding emission flux, thereby broadening the monitoring range of the prior art. Therefore, the present monitoring system and method are of great significance for quantifying emissions from multiple point sources and unorganized sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the system composition structure of the present invention.

[0036] Figure 2 It is a flow chart of the monitoring principle process of the present invention.

[0037] Symbols in the figure: mobile platform 1, solar tracker 2, mid-infrared Fourier transform spectrometer 3, mid-infrared spectrometer 4, long optical path absorption cell 5, gas pump 6, infrared light source 7, vertical wind field measurement device 8, positioning device 9, and calculation unit 10. DETAILED DESCRIPTION

[0038] Example 1

[0039] See also Figure 1 and Figure 2 The present invention provides a VOCs emission flux infrared remote sensing monitoring system based on vertical wind field data, comprising a mobile platform 1, on which an infrared occultation flux system is provided, the infrared occultation flux system is used to measure the mid-infrared absorption spectrum of the volatile organic compound column concentration, the infrared occultation flux system comprises a solar tracker 2 and a mid-infrared Fourier transform spectrometer 3 corresponding to the light outlet of the solar tracker 2, and the mobile platform 1 is also provided with:

[0040] A mobile air extraction Fourier transform infrared spectrometer system is used to measure the volume concentration of volatile organic compounds, including an infrared light source 7, a long optical path absorption cell 5, a gas pump 6 and a mid-infrared spectrometer 4. The gas pump 6 draws plume air into the long optical path absorption cell 5. The long optical path absorption cell 5 is used to reflect the infrared light emitted by the infrared light source 7 multiple times and send it to the mid-infrared spectrometer 4; the mid-infrared spectrometer 4 monitors and analyzes the components of the plume air and obtains the volume concentration of the components to be measured; a vertical wind field measuring device 8 is used to continuously measure wind speed and direction and obtain vertical wind field data; a positioning device 9 is used to obtain longitude and latitude information.

[0041] The solar tracker 2 used in the present invention is an imaging feedback solar tracker; the positioning device 9 used is a positioning device based on the GPS positioning system or the Beidou positioning system.

[0042] The VOCs emission flux infrared remote sensing monitoring system also includes a computing unit 10 for analyzing data. The infrared solar occultation flux system uses a solar tracker 2 (an imaging feedback solar tracker can be selected) to vertically guide sunlight to a mid-infrared Fourier transform spectrometer 3. The mid-infrared Fourier transform spectrometer 3 measures and analyzes sunlight passing through the component to be measured. The data obtained by the analysis is transmitted to the computing unit 10 for processing. The computing unit 10 is used to complete the following steps:

[0043] (1) Receive the monitoring data from the mid-infrared Fourier transform spectrometer 3, extract the gas standard absorption cross section, and obtain the column concentration (mg / m 2 );

[0044] The infrared occultation flux system uses an imaging feedback solar tracker to track the light path that is not vertically introduced into the mid-infrared Fourier transform spectrometer. There is a certain angle between the sunlight and the ground. Therefore, the computer can calculate the solar zenith angle β through the laws of astrophysics, and then combine it with the oblique column concentration c (mg / m 2 The vertical column concentration C (mg / m 2 ).

[0045] (2) The mobile air extraction Fourier transform infrared spectrometer system introduces the plume air into the sampling port through a Teflon tube, and then extracts the plume air into a long optical path absorption cell 5 through a gas pump 6. The long optical path absorption cell 5 is used to reflect the infrared light emitted by the infrared light source 7 multiple times and send it to the mid-infrared spectrometer 4. The total optical path of the long optical path absorption cell is greater than 100m. The mid-infrared spectrometer 4 analyzes and obtains the infrared absorption spectrum of the volatile organic compounds in the plume air components. The obtained data is transmitted to the calculation unit 10 for processing, and the infrared absorption spectrum can be analyzed to obtain the volume concentration ρ (mg / m 3 ).

[0046] The height of the plant emission plume is estimated by combining the column concentration of the component measured by the infrared occultation flux system and the volume concentration of the same component obtained by the mobile pumping Fourier transform infrared spectroscopy system through the calculation unit 10;

[0047] The mobile platform moves along the measurement path, and the vertical column concentration C (mg / m 2 ) The ground volume concentration of the same component measured by the mobile air-pumping Fourier transform infrared spectrometer system (mg / m 3 ), and then integrate along the measurement path to obtain the factory emission plume height H at the measurement time. The calculation formula of the factory emission plume height is:

[0048]

[0049] Where H is the height of the factory discharge plume, in meters; C (x) is the column concentration in mg / m 2 ρ (x) is the volume concentration in mg / m 3 ; x is the path traveled by the mobile platform, in meters.

[0050] The vertical wind field measuring device 8 obtains the vertical wind field data from the ground to the height of the smoke plume at the location, and obtains the average vector wind speed during the measurement process after real-time measurement along the measurement path;

[0051] Specifically: select a suitable averaging interval based on the measured plume height H. For example, if H is 245m, select 200-300m as the interval. Measure the real-time vertical wind field data within this interval at the location through the vertical wind field measurement device. Perform vector averaging calculation on the vertical wind field data of this interval in each time period according to the time resolution to obtain the final average vector wind speed v.

[0052] (3) The vertical column concentration of gas obtained by the movement of the infrared occultation flux system can constitute a cross section. The positioning device 9 arranged on the mobile platform 1 obtains the longitude and latitude information of the mobile platform 1 in real time. The column concentration obtained in step (1) is integrated along the driving path of the mobile platform in combination with the longitude and latitude information obtained by the positioning device 9. The result is then multiplied by the average vector wind speed obtained in step (2) to obtain the total emission flux under the monitoring path;

[0053] The calculation formula for the total emission flux is:

[0054]

[0055] Wherein, m is the total emission flux, in kg / h; v is the average vector wind speed, the moving direction of the mobile platform and the vertical direction form a plane, and the angle between the normal of the plane and the wind direction is α; x is the moving path of the mobile platform, in m; x1 is the starting point of the moving path, and x2 is the end point of the moving path.

[0056] (4) The present invention can also combine the ratio of the column concentration and volume concentration of the same component measured by the infrared occultation flux system in step (1) and the mobile pumping Fourier transform infrared spectroscopy system in step (2), and convert the volume concentration of the component that cannot be monitored by the single infrared occultation flux system into the emission flux through the calculation unit 10 in step (3). The calculation formula of the volume concentration of the component that cannot be monitored is:

[0057]

[0058] Where c2 is the column concentration of the component that cannot be monitored, in mg / m 2 ; ρ2 is the volume concentration of the component that cannot be monitored, in mg / m 3 ; c1 is the column concentration of the component to be measured, in mg / m 2 ; ρ1 is the volume concentration of the component to be tested, in mg / m 3 .

[0059] Example 2

[0060] The present invention also provides a VOCs emission flux infrared remote sensing monitoring method, which uses the VOCs emission flux infrared remote sensing monitoring system in Example 1 for monitoring.

[0061] The mobile platform moves along the measurement path for monitoring. The infrared occultation flux system measures the ethane oblique column concentration range of 0 to 60.89 mg / m 2 The solar zenith angle is 55.57°~60.55°, and the volume concentration of ethane measured by the mobile vacuum Fourier transform infrared spectrometer system is 0~2.45mg / m 3 , combined with the calculation formula for the factory emission plume height in Example 1, the emission plume mixing height is calculated to be 19.5m.

[0062] Therefore, the vertical wind field data from the ground to the emission plume height measured by the near-ground meteorological wind pole and the meteorological station are used, and the average vector wind speed is 3.69m / s and the wind direction is 294.61. The location information of the mobile platform is recorded by GPS, the starting coordinates are (30.001068, 121.64942), and the end coordinates are (30.013561, 121.63483). The angle between the plane normal formed by the mobile platform's driving direction and the vertical direction and the wind direction changes all the time. The calculation unit integrates along the path according to the calculation formula of the total emission flux, and the emission flux of ethane under this moving path can be obtained as 25.54kg / h.

[0063] The volume concentration of methane obtained by the mobile pumping Fourier transform infrared spectroscopy system is 0~1.6mg / m 3 Combined with the calculation formula of the volume concentration of the components that could not be monitored, the column concentration range of methane can be obtained as 0-31.24 mg / m 2 Finally, the methane emission flux was calculated to be 13.42 kg / h through the calculation formula of the total emission flux.

[0064] In summary, the present invention combines the measured volume concentration and column concentration of the same component to obtain the monitored emission plume mixed plume height, and uses a vertical wind field measurement device to obtain vertical wind field data, thereby reducing the error in the emission flux measurement process. At the same time, by combining the ratio of the column concentration and volume concentration of the same component measured by the infrared occultation flux system and the mobile exhaust Fourier transform infrared spectroscopy system, the volume concentration of the component (such as aromatic volatile organic compounds) that the single infrared occultation flux system fails to monitor can be converted into the corresponding emission flux, thereby broadening the monitoring range of the prior art.

Claims

1. A VOCs emission flux infrared remote sensing monitoring system based on vertical wind field data, comprising a mobile platform, an infrared solar occultation flux system is provided on the mobile platform, the infrared solar occultation flux system is used to measure the mid-infrared absorption spectrum of the volatile organic compound column concentration, the infrared solar occultation flux system comprises a solar tracker and a mid-infrared Fourier transform spectrometer corresponding to the light outlet of the solar tracker, characterized in that: The mobile platform is also provided with: A mobile air-pumping Fourier transform infrared spectrometer system is used to measure the volume concentration of volatile organic compounds, comprising an infrared light source, a long optical path absorption cell, a gas pump and a mid-infrared spectrometer, wherein the gas pump extracts plume air into the long optical path absorption cell, and the long optical path absorption cell is used to reflect the infrared light emitted by the infrared light source multiple times and send the reflected light into the mid-infrared spectrometer; The mid-infrared spectrometer monitors and analyzes the plume air components and obtains the volume concentration of the components to be measured; Vertical wind field measurement device, used to continuously measure wind speed and direction and obtain vertical wind field data; A positioning device is used to obtain longitude and latitude information.

2. The VOCs emission flux infrared remote sensing monitoring system according to claim 1, characterized in that: The solar tracker is an imaging feedback solar tracker; The positioning device is a positioning device based on the GPS positioning system or the Beidou positioning system.

3. The VOCs emission flux infrared remote sensing monitoring system according to claim 1, characterized in that: Also included is a computing unit for analyzing data, the computing unit being used to complete the following steps: (1) receiving monitoring data from the mid-infrared Fourier transform spectrometer, extracting the gas standard absorption cross section, and obtaining the column concentration of the component to be measured based on nonlinear least squares inversion; (2) The column concentration of the component measured by the infrared occultation flux system and the volume concentration of the same component obtained by the mobile extraction Fourier transform infrared spectroscopy system are combined to estimate the factory emission plume height; the vertical wind field data from the near ground to the emission plume height at the location are obtained by the vertical wind field measurement device, and the average vector wind speed during the measurement process is obtained by real-time measurement along the measurement path; (3) Integrate the column concentration obtained in step (1) along the travel path of the mobile platform in combination with the longitude and latitude information obtained by the positioning device, and then multiply the result by the average vector wind speed obtained in step (2) to obtain the total emission flux under the monitoring path.

4. The VOCs emission flux infrared remote sensing monitoring system according to claim 3 is characterized in that: In step (1), if the light path tracked by the solar tracker is not vertically introduced into the mid-infrared Fourier transform spectrometer, the solar zenith angle is calculated according to the laws of astrophysics, and the column concentration is the vertical column concentration of the component to be measured obtained by multiplying the oblique column concentration of the component to be measured by the cosine value of the solar zenith angle based on the nonlinear least squares inversion.

5. The VOCs emission flux infrared remote sensing monitoring system according to claim 4, characterized in that: In step (2), the calculation formula for the factory emission plume height is: Where H is the height of the factory discharge plume, in meters; C (x) is the column concentration in mg / m 2 ; ρ (x) is the volume concentration in mg / m 3 ; x is the path traveled by the mobile platform, in meters.

6. The VOCs emission flux infrared remote sensing monitoring system according to claim 5, characterized in that: In step (3), the calculation formula of the total emission flux is: Wherein, m is the total emission flux, in kg / h; v is the average vector wind speed, the moving direction of the mobile platform and the vertical direction form a plane, the angle between the normal of the plane and the wind direction is α, x is the moving path of the mobile platform, in m; x1 is the starting point of the moving path, and x2 is the end point of the moving path.

7. The VOCs emission flux infrared remote sensing monitoring system according to claim 3 is characterized in that: The calculation unit is also used to complete the following steps: combining the ratio of the column concentration and volume concentration of the same component measured by the infrared occultation flux system in step (1) and the mobile pumping Fourier transform infrared spectroscopy system in step (2), and converting the volume concentration of the component that the single infrared occultation flux system fails to monitor into the emission flux according to step (3).

8. The VOCs emission flux infrared remote sensing monitoring system according to claim 7, characterized in that: The calculation formula for the volume concentration of the component that cannot be monitored is: Where c2 is the column concentration of the component that cannot be monitored, in mg / m 2 ; ρ2 is the volume concentration of the component that cannot be monitored, in mg / m 3 ; c1 is the column concentration of the component to be measured, in mg / m 2 ; ρ1 is the volume concentration of the component to be measured, in mg / m 3 .

9. A VOCs emission flux infrared remote sensing monitoring method based on vertical wind field data, characterized in that: The VOCs emission flux infrared remote sensing monitoring system according to any one of claims 1 to 8 is used for monitoring.

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