烟塔合一排烟方式中下洗过程的浓度分布  

Concentration distribution of flue gas discharged at washing process of natural draft cooling tower

作　　者：杨洪斌[1] 张云海[1] 邹旭东[1] 汪宏宇[1] 刘海龙 刘玉彻[1] YANG Hong-bin;ZHANG Yun-hai;ZOU Xu-dong;WANG Hong-yu;LIU Hai-long;LILT Yu-che(Institute of Atmospheric Environment,China Meteorological Administration,Shenyang 110166,China;Liaoning Meteorological Equipment and Support Center,Shenyang 110166,China)

机构地区：[1]中国气象局沈阳大气环境研究所,辽宁沈阳110166 [2]辽宁省气象装备保障中心,辽宁沈阳110166

出　　处：《气象与环境学报》2018年第5期156-162,共7页Journal of Meteorology and Environment

基　　金：国家自然科学基金面上项目(41375146)资助

摘　　要：利用德国AUSTAL2000模型系统中的下洗模块和采用烟塔合一排烟方式的某热电厂源强资料,对各种条件下的下洗过程中的各污染物浓度进行模拟计算。结果表明:对于烟塔合一排烟方式,选取不同的风速及不同的冷却塔几何参数,模拟得到的下洗过程中的空中及地面浓度差别较大。对于本案例中的110 m高的冷却塔,随着环境风速的逐渐增大,下洗过程产生的高空和地面浓度最大值均逐渐减小;而且高空最大浓度值的位置离地面的高度逐渐降低,离冷却塔的水平距离逐渐减小。当冷却塔的高度增加到130 m,而其他参数不变时,则高空和地面的浓度变化规律没有变;但随着冷却塔高度的增加,高空和地面浓度最大值均呈减小趋势。当冷却塔出口内径由50 m增加到60 m而其他参数不变时,随着环境风速的增大高空和地面的浓度变化规律没有变;但高空和地面浓度最大值的位置与冷却塔的水平距离均有所增加。Concentration of various pollutants discharged at washing process was simulated using washing module of AUSTAL2000 model and pollutant source data from a thermo power station which flue gas discharged from the natural draft cooling tower.The results show that different wind speeds and cooling tower geometrical parameters exert considerable influence on the simulated concentration of pollutants in the air and at the ground.The maximum concentration of pollutant in the air and at the ground decreases along with the increasing wind speed when the height of cooling tower is 110 m.Moreover,the height of the maximum pollutant concentration in the air and the horizontal distance from the cooling tower also decrease.There is no obvious variation of the pollutant concentration in the upper air and at the ground except the maximum concentration in the air and at the ground decreasing when the height of the cooling tower increases to 130 m with other parameters unchanged.When the inner diameter of cooling tower outlet increases from 50 m to 60 m with other parameters unchanged,the pollutant concentration in the air and at the ground varies slightly with the increasing wind speed,but the horizontal distance of the maximum pollutant concentration in the air and at the ground from cooling tower increases slightly.

关 键 词：AUSTAL2000模型 烟羽抬升 烟塔合一排烟 下洗 

分 类 号：X820.3[环境科学与工程—环境工程]