工业园区无组织VOCs溯源方法研究  

Research on tracing method of unorganized VOCs in industrial parks

作　　者：陆秋琴[1] 杨帅 黄光球[1] LU Qiu-qin;YANG Shuai;HUANG Guang-qiu(School of Management,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学管理学院,西安710055

出　　处：《安全与环境学报》2023年第2期584-594,共11页Journal of Safety and Environment

基　　金：国家自然科学基金项目(71874134);陕西省自然科学基础研究计划-重点项目(2019JZ-30)。

摘　　要：为了对工业园区下风向监测点的无组织挥发性有机物(Volatile Organic Compounds, VOCs)来源进行溯源解析,快速锁定污染源头,基于扩散模型反推法构建工业园区无组织VOCs溯源模型。首先对园区建立笛卡尔空间坐标系,根据风向确定工业园区的下风向监测点,通过高斯扩散模型计算有组织VOCs排放源到下风向监测点的质量浓度,依据下风向监测点的总挥发性有机化合物(Total Volatile Organic Compounds, TVOCs)以及上风向监测点的VOCs背景值计算无组织VOCs对下风向监测点的质量浓度贡献;进而结合无组织VOCs排放面源所在位置坐标,运用高斯扩散虚点源后置法建立无组织VOCs排放源到下风向监测点的关系,采用最小二乘法反算出各个无组织VOCs的排放源强;最后计算出各个无组织VOCs排放源到各下风向监测点的质量浓度以及对园区下风向监测点的质量浓度贡献比例。结果表明,下风向监测点S_(2)中,有12.10%的污染物来源于无组织VOCs排放源D_(1);S_(3)中有38.38%来源于D_(1);S_(4)中有11.74%来源于D1,71.70%来源于D_(2);而S_(6)和S_(7)没有监测到来源于无组织VOCs排放源的污染物。To trace the source of unorganized VOC emissions from monitoring points in the downwind direction of the industrial park, and quickly locate the source of pollution, a traceability model of unorganized VOCs in the industrial park was constructed based on the diffusion model reverse method. First, the center of the industrial park was regarded as the origin of the coordinates, the east of the origin was the positive x-axis, the north was the positive axis of the y-axis, and the z-axis was perpendicular to the plane of the x and y axes to establish a Cartesian space coordinate system for the park. The downwind monitoring point of the industrial park was determined according to the wind direction, and the concentration contribution value of the organized VOC emission source to the downwind monitoring point was calculated by Gaussian plume diffusion model. Based on the TVOCs value monitored at the downwind monitoring point and the VOC background value monitored at the upwind monitoring point, we calculated the contribution value of the unorganized VOC emission source to the downwind monitoring point and then combined it with the location coordinates of the non-organized VOC emission non-point source. It was proposed to use the largest common divisor of the length and width of the non-organized VOC emission non-point source as the unit non-point source. The unorganized VOC emission non-point source was divided into several equal-sized units of non-point sources. The Gaussian diffusion virtual point source post-location method was used to establish the correspondence between the unorganized VOC emission non-point source and the downwind monitoring point of the industrial park. The least square method was used to calculate the emission source strength of each unorganized VOCs non-point source by multiplication. Finally, through the back calculation of the unorganized VOC emission source strength and the Gaussian diffusion virtual point source post method, we calculated the concentration value of each unorganized VOC emi

关 键 词：环境工程学 工业园区 无组织挥发性有机物 高斯扩散模型 最小二乘法 

分 类 号：X511[环境科学与工程—环境工程]