复杂河谷地形排气筒高度的设计.PDF

安徽农业大学学报, 2016, 43(6): 951-956 Journal of Anhui Agricultural University [DOI] 10.13610/ki.1672-352x027 网络出版时间：2016/12/5 10:25:00 [URL] /kcms/detail/34.1162.S1025.054.html 复杂河谷地形排气筒高度的设计 张有贤，甄天坷，杨志强 (兰州大学资源环境学院，兰州 730000) 摘 要：通过 CALPUFF 模型，利用崆峒区气象资料、地形资料分析了废气源位于复杂河谷地形内其排气筒高 度与最大地面小时、日均及年均落地浓度的关系，为复杂地形选择设计排气筒高度提供依据。结果表明，河谷内排 气筒高度在某些范围内，尤其是在较低的高度段，污染物落地浓度并不会随着排气筒高度增加而减少，可能会出现 相反的规律或者上下波动；排气筒高度到达一定高度后，最大落地浓度呈降低趋势，但当排气筒高度高到一定程度 时，对落地浓度的影响明显减小。谷地有组织排放源排放高度不宜低于 70 m，对于有毒有害物质排放量较大的化 工企业有组织源排放高度不宜低于 130 m，对于电厂烟囱等特大型有组织源排放高度宜采取 300 m 集中烟囱排放。 关键词：CALPUFF 模型；复杂地形；河谷；排气筒高度 中图分类号：X823 文献标识码：A 文章编号：1672352X (2016)06095106 Determination of exhaust chimney height in complex terrain valley ZHANG Youxian, ZHEN Tianke, YANG Zhiqiang (College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000) Abstract: The relationship between chimney heights and hourly, daily and annual ground maximum concen- tration of exhaust gas was analyzed using meteorological data and terrain data of Kongtong Area on the basis of CALPUFF atmospheric dispersion model in complex terrain valley, which could provide a basis for choosing chimney heights in a complex terrain. The results indicated that the ground-level concentration of pollutant did not decrease with an increase of the chimney height and an opposite rule or fluctuations were observed within a cer- tain range in valley, especially in a lower level. When the chimney height reached a certain level, the maximum ground-level concentration of pollutant was decreasing; however, when the chimney height reached a definite ex- tent, the effect of the ground-level concentration of pollutant was firstly significantly reduced and then tended to