源解析模型溯源准确性验证实验研究

Experimental Research on the Accuracy Verification of a Source Apportionment Model

研发了一种主成分分析-化学质量平衡模型相复合的定量源解析模型,并利用在石化企业内开展现场实验的方法,通过释放固定比例的挥发性有机物纯气模拟一个新的排放源泄漏,扩散传输至受体区域后进行样品采集,分析后代入研发的模型进行解析,结合周边生产装置污染特征指纹图谱、样品分析浓度、人为模拟排放源的污染贡献率等因素判断溯源结果的准确性。多组现场实验结果表明,该模型溯源效果良好,能够准确解析污染物来源并得到污染贡献率。

A quantitative source analytical model of principal component analysis chemical mass balance model was developed.Using the method of conducting field experiments in a petrochemical enterprise,a new emission source leakage was simulated artificially by releasing a fixed proportion of pure volatile organic compounds.After gas diffusion and atmospheric transmission to the receptor region,samples were collected and then analyzed into the developed model for analysis.The results of source apportionment were generated via model analyses.The accuracy of traceability was judged based on factors such as the pollution characteristic fingerprints of surrounding facilities,the concentration of VOCs samples,and the contribution rate of man-made simulated emission sources.The results of multiple field experiments showed that the model had good traceability effect and could qualitatively analyze the sources of pollutants and obtain the contribution rate.