关联区域内VOCs聚集成因解析方法研究

Research on the analysis method of the causes ofVOCs aggregation in related regions

为研究目标区域VOCs聚集的主要成因,同时挖掘VOCs自潜在污染源扩散迁移至聚集区域的过程,提出一种基于随机函数Petri网的关联区域内VOCs聚集成因的解析方法。运用HYSPLIT确定VOCs聚集的关联区域以及VOCs的聚集路径,并将其映射为随机函数Petri网;通过计算稳态概率等指标对Petri网的性能进行分析,将聚集区域VOCs浓度的增量计算过程融入到随机Petri网的运行过程中,从而分析目标区域VOCs聚集的主要成因。案例研究分析了临汾市一次重污染天气下,各潜在污染源对临汾市VOCs浓度增加的影响大小,得出B企业、C企业和D企业为临汾市VOCs聚集的主要成因。该方法为研究目标区域VOCs聚集的主要来源及成因提供了依据。

To study the main causes of atmospheric pollution caused by VOCs aggregation in the target area and explore the dynamic process of VOCs diffusion and migration from potential pollution sources to the target area,this paper proposed an analytical method for the causes of VOCs aggregation in the associated area based on stochastic function Petri net.Firstly,the HYSPLIT model was used to determine the associated area of VOCs aggregation,and the potential pollution sources were determined in the associated area.At the same time,the aggregation path of VOCs diffusion and migration from the potential pollution sources to the target area was determined,and it was mapped into a stochastic function Petri net model.Secondly,the performance of the Petri net model was analyzed by calculating the steady-state probability of the stochastic function Petri net model,the average token number of the Place,and other indicators.The incremental change calculation process of the VOCs concentration in the target area was combined with the operation process of the stochastic function Petri net model,and the contribution value of each potential pollution source to the VOCs concentration in the target area was calculated to analyze the main causes of VOCs aggregation in the target area.The case study analyzed the influence of various potential pollution sources on the increase of VOCs concentration in Linfen city under heavy pollution weather.The calculation results show that B enterprises,C enterprises,and D enterprises are the main causes of the clustering of VOCs in Linfen City,and specific treatment suggestions are given accordingly.This method provides a basis for studying the main sources and causes of VOCs aggregation in the target region and develops a method for mining the dynamic process of VOCs diffusion and aggregation in the associated region.