Reverse identification method for pollution source with air pollutant chemical reaction condition
A technology of air pollutants and chemical reactions, which is applied in the field of air pollution monitoring and source identification, can solve the problems of not considering the chemical reactions of pollutants, and achieve the effect of widening the types of pollutants and accurate calculation results
Active Publication Date: 2021-01-22
DALIAN UNIV OF TECH
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Problems solved by technology
[0005] The main purpose of the present invention is to solve the problem of rapid identification of urban particulate pollutant pollution sources, and to solve the defect that the patent (authorized notification number CN106650017A) does not take into account the chemical reaction of pollutants in the air
Method used
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Embodiment
[0042] Embodiment: set up a three-dimensional factory model, factory chimney is pollution source, discharge pollutant is B, the air chemical reaction of shape such as B+AM → AB+M has taken place, and the reaction rate constant of this reaction is 5cm 3 molecule -1 the s -1 , component AM in the background air at a constant concentration of 10molecule / m 3 exists, the source finding steps are as follows:
[0043] Step 1, the factory chimney is the source of pollution, the pollutant discharged is B, and an air chemical reaction in the form of B+AM→AB+M occurs, and the reaction rate constant of this reaction is 5cm 3 molecule -1 the s -1 , component AM in the background air at a constant concentration of 10molecule / m 3 Existence, according to the type of reaction, determine the flag element as B, and use it as the object for the next step of analysis;
[0044] Step 2, establish the numerical model of the area to be tested as figure 2 As shown, according to the meteorologic...
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The invention discloses a reverse identification method for a pollution source with an air pollutant chemical reaction condition, and belongs to the technical field of air pollution monitoring and source identification. Aiming at pollutants with chemical reaction in the diffusion process, a mark element reverse analysis method is developed, and the change of components before and after the chemical reaction is simulated by determining mark elements in the chemical reaction of the air pollutants as objects. Firstly, the pollution type of a to-be-detected pollution source in a target area is obtained, and whether pollutants have a chemical reaction phenomenon or not is determined; a numerical model of a to-be-measured area is established and a flow field is calcualted; the pollutant concentration is read by using a concentration monitoring device, marker element concentration data are analyzed and calculated, the marker element concentration data are substituted into an adjoint method equation set to solve, and pollution source information is calculated by using an adjoint probability method. According to the method, marker elements are extracted, the influence of air pollutant chemical reaction on pollutant propagation is considered, and the accuracy of pollution source monitoring is improved.
Description
technical field [0001] The invention belongs to the technical field of air pollution monitoring and source identification, and in particular relates to a method for reverse identification of pollution sources in the presence of chemical reactions of air pollutants. Background technique [0002] Understanding atmospheric transport and dispersion events plays an important role in a range of scenarios, especially for emergency response measures following the spread of chemical, biological or radioactive substances. Major events such as increasing emissions and releases of pollutants, terrorist threats, nuclear accidents, and natural disasters, which adversely affect public health and multiple industries, release harmful substances into the atmosphere. Some studies on the dispersion of air pollutants use models to predict the concentration of air pollutants given the distribution of emission sources to provide emergency response measures, which are helpful for effective response...
Claims
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IPC IPC(8): G16C20/10G16C20/20G16C20/70
CPCG16C20/10G16C20/20G16C20/70Y02A50/20
Inventor 薛雨顾钦子王祎葛凡翟志强
Owner DALIAN UNIV OF TECH