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VOCs source analysis method based on chemical dynamics-receptor model fusion technology

A technology of chemical kinetics and model fusion, applied in the field of atmospheric volatile organic compounds, can solve the problem of inability to obtain pollution source emissions, achieve the effect of good promotion and application prospects and improve computing efficiency

Active Publication Date: 2021-04-06
NANKAI UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that in the current online source apportionment technology based on the combination of online monitoring data and receptor model, the source apportionment results that are closer to the emission of pollution sources cannot be obtained through automated methods; On-line monitoring data, combined with kinetic process analysis, automatically calculates the initial VOCs concentration of source emissions, and incorporates the factor analysis model, providing a chemical kinetics-receptor model fusion source analysis technology

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  • VOCs source analysis method based on chemical dynamics-receptor model fusion technology
  • VOCs source analysis method based on chemical dynamics-receptor model fusion technology
  • VOCs source analysis method based on chemical dynamics-receptor model fusion technology

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Embodiment 1

[0040] attached by figure 1 And attached figure 2 It can be seen that this example uses online monitoring data and factor analysis model to carry out model calculation of VOCs pollution source identification. The specific steps are as follows:

[0041] (1) Pre-processing of online data;

[0042] The present invention is based on the high-time-resolution meteorological pollutant concentration and meteorological factors monitored by different online instruments before the model input data, and the input data includes VOCs and O 3 observed concentration.

[0043] Instruments: use a gas chromatograph system (equipped with a photoionization detector and a flame ionization detector) to measure the VOCs concentration; use an ultraviolet absorber to measure the hourly ozone concentration.

[0044] Data: Continuous sampling from 0:00 on January 1, 2018 to 23:00 on December 31, 2018, the time resolution of the monitoring data is 1 hour, and a total of 7,759 valid receptor data were ...

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Abstract

A VOCs source analysis method based on a chemical kinetic receptor model fusion technology relates to the field of atmospheric volatile organic compounds, and comprises the following steps: (1) preprocessing and inputting online data; (2) calculating chemical kinetic parameters; (3) calculating the concentrations of initial VOCs and consumed VOCs discharged by the source; (4) performing PMF / ME2 model parameter setting, including basic setting and source spectrum characteristic constraint; (5) performing PTTPMF model parameter setting, including basic setting and actual measurement source component spectrum setting; and (6) calculating source contribution: using a PMF / ME2 model and a PTTPMF model, and mutually verifying results of the two models. The chemical kinetic receptor model fusion source analysis technology provided by the invention can realize automation of VOCs initial concentration conversion in the calculation process of the factor analysis model, can also make up for the situation of VOCs source component spectrum loss, improves the accuracy of model calculation, realizes automatic calculation of the factor analysis model, and has very good popularization and application prospects.

Description

technical field [0001] The invention relates to the field of atmospheric volatile organic compounds, in particular to a chemical kinetics-receptor model fusion source analysis technology. Background technique [0002] VOCs are key precursors for the formation of tropospheric ozone. With the acceleration of industrialization and urbanization in our country, the emission of VOCs is increasing day by day, and the problem of VOCs pollution in the atmosphere has become more prominent. VOCs and nitrogen oxides (NO x ) photochemical reaction process will destroy NO, NO 2 with O 3 The basic chemical cycle, resulting in O in the environment 3 In serious cases, photochemical smog will be formed, which will reduce the visibility of the area and cause harm to the human body and the environment. Therefore, a greater understanding of the characteristics of VOC emissions, especially from anthropogenic sources, may help to control China's O 3 Pollution. [0003] VOCs are composed of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C60/00
CPCG16C60/00
Inventor 史国良王振宇王丰卫昱婷冯银厂
Owner NANKAI UNIV
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