A method and apparatus for precise source tracing analysis of atmospheric ozone pollution

Abstract

This invention discloses a method and apparatus for precise source tracing and analysis of atmospheric ozone pollution. Based on the concentration data of each VOC species among multiple species monitored at ambient air quality monitoring stations, the ozone generation potential of each species is determined; the ozone generation reactivity of each species is determined; key VOC species for ozone generation are screened based on both ozone generation potential and ozone generation reactivity; mobile VOC monitoring is conducted around the ambient air quality monitoring stations, and automatic offline sampling and laboratory analysis are performed at high-value TVOC sites; key pollution sources for ozone generation at the ambient air quality monitoring stations are identified and subject to control. This invention provides a more comprehensive analysis of atmospheric ozone pollution, accurately identifying specific pollution sources and better providing technical support for environmental management.

Description

Technical Field

[0001] This invention belongs to the field of air pollution prevention and control, and in particular relates to a method and device for precise source tracing and analysis of atmospheric ozone pollution. Background Technology

[0002] Ground-level ozone is a secondary pollutant, formed by complex photochemical reactions of volatile organic compounds (VOCs) and nitrogen oxides (NOx) under sunlight. In my country, ozone pollution in suburban areas and urban clusters is generally controlled by VOCs, while in rural areas it is controlled by NOx.

[0003] Accurate source tracing of key VOCs components involved in ozone formation is crucial. However, given the wide range and diversity of VOCs sources, quickly and accurately identifying key VOCs pollution sources for ozone control remains a significant technical challenge. Current techniques primarily rely on theoretical calculations of ozone formation potential to screen key VOCs components, but they do not consider the impact of actual formation conditions on VOCs' participation in photochemical reactions. Furthermore, while current VOCs source apportionment methods can identify industry contributions, they cannot pinpoint specific pollution sources, thus failing to provide adequate technical support for environmental management. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned problems in the existing technology and to provide a method and device for precise source tracing and analysis of atmospheric ozone pollution.

[0005] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution:

[0006] A precise source tracing analysis method for atmospheric ozone pollution, the analysis method comprising the following steps:

[0007] Step 1: Based on the concentration data of each species of VOCs among multiple species monitored at ambient air quality monitoring points, determine the ozone generation potential of each species.

[0008] Step 2: Based on the concentration data of each species of VOCs and the ozone concentration data monitored at the ambient air quality monitoring points, determine the ozone generation reactivity of each species.

[0009] Step 3: Based on the ozone generation potential and ozone generation reactivity of each species among the multiple VOCs detected at ambient air quality monitoring points, key VOC species for ozone generation are screened out.

[0010] Step 4: Conduct mobile VOCs monitoring around ambient air quality monitoring points, and carry out automatic offline sampling and laboratory analysis at high TVOC points;

[0011] Step 5: Based on the comparison of VOCs components corresponding to key VOCs species for ozone formation at ambient air quality monitoring sites and VOCs components at sampling sites, combined with meteorological information data and the VOCs fingerprint database of emissions from pollution sources around the sampling sites, determine the key pollution sources for ozone formation at ambient air quality monitoring sites.

[0012] Step three specifically includes: selecting the first target species with the highest ozone generation potential (ranked M) and the second target species with the highest absolute value of ozone generation reactivity (ranked N) from the multiple species of VOCs; wherein M and N are both integers not less than 1, and selecting VOC species belonging to both the first and second target species as key VOC species for ozone generation at ambient air quality monitoring points.

[0013] The present invention also provides a device for precise source tracing and analysis of atmospheric ozone pollution, the device comprising:

[0014] The first monitoring module is used to determine the ozone generation potential of each of the multiple species of VOCs monitored at ambient air quality monitoring points.

[0015] The second monitoring module is used to determine the ozone generation reactivity of each species based on the concentration data of each species among multiple species of VOCs and the ozone concentration data monitored at the ambient air quality monitoring points.

[0016] The screening unit is used to jointly screen out key VOC species for ozone generation based on the ozone generation potential and ozone generation reactivity of each species among multiple species of VOCs detected at ambient air quality monitoring points.

[0017] The third monitoring module is used to conduct mobile monitoring of VOCs around ambient air quality monitoring points, and to carry out automatic offline sampling and laboratory analysis of high TVOC points to obtain the concentration data of each species among multiple species of VOCs at the sampling points.

[0018] The precise source tracing module is used to identify the pollution sources affecting ozone pollution at monitoring points based on key VOCs components for ozone generation at monitoring points, VOCs component information at sampling points, meteorological data, and a fingerprint database of VOCs emitted by pollution sources around the sampling points.

[0019] The filtering unit specifically includes:

[0020] The first screening module is used to screen out the first target species with the top M ozone generation potential from multiple species of VOCs; where M is an integer not less than 1.

[0021] The second screening module is used to screen out the second target species from the multiple species of the VOCs, which ranks in the top N in terms of absolute value of ozone generation reactivity; where N is an integer not less than 1.

[0022] The third screening module is used to identify VOC species that are included in both the first and second target species as key VOC species for ozone generation at ambient air quality monitoring points.

[0023] The beneficial effects of this invention are:

[0024] This invention screens key VOCs components based on the ozone generation potential of each species of VOCs component and the correlation between the concentration of each species of VOCs component and the change in ozone concentration. The screened key VOCs components can actually represent the significant contribution of the key VOCs component to ozone generation.

[0025] This invention identifies target VOC species by screening key VOCs components for ozone formation at ambient air quality monitoring sites. It then conducts mobile VOCs monitoring in the areas surrounding the monitoring sites using a vehicle-mounted VOCs mobile monitoring method. High-TVOC levels are detected, automatically triggering offline sampling using a somnambulism canister. VOCs components are determined using the national laboratory standard method. By comparing the key VOCs components for ozone formation at the monitoring sites with those at the sampling sites, and combining meteorological data and a list of pollutant emissions from surrounding pollution sources, the invention accurately pinpoints key pollution sources for ozone formation under control.

[0026] This invention provides a more comprehensive analysis of atmospheric ozone pollution, accurately identifying specific pollution sources and better providing technical support for environmental management. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the analysis method of the present invention;

[0029] Figure 2 This is a schematic diagram of the analytical device structure of the present invention. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1 The method for precise source tracing analysis of atmospheric ozone pollution, as shown, includes the following steps:

[0032] Step 1: Based on the concentration data of each species of VOCs among multiple species monitored at ambient air quality monitoring points, determine the ozone generation potential of each species.

[0033] Step 2: Based on the concentration data of each species of VOCs and the ozone concentration data monitored at the ambient air quality monitoring points, determine the ozone generation reactivity of each species; the larger the absolute value of the negative correlation, the greater the reactivity.

[0034] Step 3: Based on the ozone generation potential and ozone generation reactivity of each species among the multiple VOCs detected at ambient air quality monitoring points, key VOC species for ozone generation are screened out.

[0035] Step 3 specifically includes: selecting the first target species with the highest ozone generation potential (ranked M) and the second target species with the highest absolute value of ozone generation reactivity (ranked N) from the multiple species of VOCs; wherein M and N are both integers not less than 1, and selecting VOC species belonging to both the first and second target species as key VOC species for ozone generation at ambient air quality monitoring points.

[0036] Step 4: Conduct mobile VOCs monitoring around ambient air quality monitoring points, and carry out automatic offline sampling and laboratory analysis at high TVOC points;

[0037] Step 5: Based on the comparison of VOCs components corresponding to key VOCs species for ozone formation at ambient air quality monitoring sites and VOCs components at sampling sites, combined with meteorological information data and the VOCs fingerprint database of emissions from pollution sources around the sampling sites, determine the key pollution sources for ozone formation at ambient air quality monitoring sites.

[0038] like Figure 2 The device shown is a precise source tracing and analysis device for atmospheric ozone pollution. The analysis device includes:

[0039] The first monitoring module is used to determine the ozone generation potential of each of the multiple species of VOCs monitored at ambient air quality monitoring points.

[0040] The second monitoring module is used to determine the ozone generation reactivity of each species based on the concentration data of each species among multiple species of VOCs and the ozone concentration data monitored at the ambient air quality monitoring points.

[0041] The screening unit is used to jointly screen out key VOC species for ozone generation based on the ozone generation potential and ozone generation reactivity of each species among multiple species of VOCs detected at ambient air quality monitoring points.

[0042] The filtering unit specifically includes:

[0043] The first screening module is used to screen out the first target species with the top M ozone generation potential from multiple species of VOCs; where M is an integer not less than 1.

[0044] The second screening module is used to screen out the second target species from the multiple species of the VOCs, which ranks in the top N in terms of absolute value of ozone generation reactivity; where N is an integer not less than 1.

[0045] The third screening module is used to identify VOC species that are included in both the first and second target species as key VOC species for ozone generation at ambient air quality monitoring points.

[0046] The third monitoring module is used to conduct mobile monitoring of VOCs around ambient air quality monitoring points, and to carry out automatic offline sampling and laboratory analysis of high TVOC points to obtain the concentration data of each species among multiple species of VOCs at the sampling points.

[0047] The precise source tracing module is used to identify the pollution sources affecting ozone pollution at monitoring points based on key VOCs components for ozone generation at monitoring points, VOCs component information at sampling points, meteorological data, and a fingerprint database of VOCs emitted by pollution sources around the sampling points.

[0048] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A method for precise source tracing and analysis of atmospheric ozone pollution, characterized in that, Includes the following steps: Step 1: Based on the concentration data of each species of VOCs among multiple species monitored at ambient air quality monitoring points, determine the ozone generation potential of each species. Step 2: Based on the concentration data of each species of VOCs and the ozone concentration data of the multiple species monitored at the ambient air quality monitoring points, determine the ozone generation reactivity of each species. Step 3: Based on the ozone generation potential and ozone generation reactivity of each of the multiple VOCs species monitored at the ambient air quality monitoring points, key VOC species for ozone generation are jointly screened. Specifically, this includes: screening out the first target species with the top M ozone generation potential and the second target species with the top N absolute values ​​of ozone generation reactivity from the multiple VOC species; where M and N are both integers not less than 1, and selecting VOC species belonging to both the first and second target species as key VOC species for ozone generation at the ambient air quality monitoring points. Step 4: Conduct mobile VOCs monitoring around ambient air quality monitoring points, and carry out automatic offline sampling and laboratory analysis at high TVOC points; Step 5: Based on the comparison of VOCs components corresponding to key VOCs species for ozone formation at ambient air quality monitoring sites and VOCs components at sampling sites, combined with meteorological information data and the VOCs fingerprint database of emissions from pollution sources around the sampling sites, determine the key pollution sources for ozone formation at ambient air quality monitoring sites.

2. A precise source tracing and analysis device for atmospheric ozone pollution, characterized in that, include: The first monitoring module is used to determine the ozone generation potential of each of the multiple species of VOCs monitored at ambient air quality monitoring points. The second monitoring module is used to determine the ozone generation reactivity of each species based on the concentration data of each species among multiple species of VOCs and the ozone concentration data monitored at the ambient air quality monitoring points. A screening unit is used to jointly screen key ozone-generating VOC species based on the ozone generation potential and ozone generation reactivity of each species among multiple VOC species monitored at ambient air quality monitoring points. Specifically, the screening unit includes: a first screening module for screening the first target species with the top M ozone generation potential from the multiple VOC species, where M is an integer not less than 1; a second screening module for screening the second target species with the top N absolute values ​​of ozone generation reactivity from the multiple VOC species, where N is an integer not less than 1; and a third screening module for selecting VOC species contained in both the first and second target species as key ozone-generating VOC species at the ambient air quality monitoring points. The third monitoring module is used to conduct mobile monitoring of VOCs around ambient air quality monitoring points, and to carry out automatic offline sampling and laboratory analysis of high TVOC points to obtain the concentration data of each species among multiple species of VOCs at the sampling points. The precise source tracing module is used to identify the pollution sources affecting ozone pollution at monitoring points based on key VOCs components for ozone generation at monitoring points, VOCs component information at sampling points, meteorological data, and a fingerprint database of VOCs emitted by pollution sources around the sampling points.

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