湿烟羽扩散特性研究

Study on Diffusion Characteristics of Wet Plume

湿烟气由烟囱出口进入温度较低的环境空气会形成湿烟羽,俗称"大白烟",产生视觉污染。选取湿烟羽长度来研究湿烟羽对环境的影响范围和严重程度,重点分析了环境条件和烟气条件对湿烟羽长度的影响。结果表明,湿烟羽长度与环境温度和环境相对湿度呈指数关系变化,环境温度对湿烟羽长度的影响更大;烟气速度对湿烟羽的影响程度小于环境风速;环境温度越低,烟气温度对湿烟羽长度的影响越大;烟囱出口半径越大,湿烟羽长度越大。

Wet plume forms when the wet flue gas from the chimney exits into the ambient air,which would bring about visual pollution.In the paper,the length of wet plume was applied to study the severity of wet plumes,and effects of environmental conditions and flue gas conditions on wet plume length were analyzed emphatically.Results show that,the length of wet plume has an exponential relationship with the ambient temperature and relative humidity,and the influence of ambient temperature on wet plume length was greater.The influence of flue gas velocity on wet plume was smaller than that of ambient wind;the lower the ambient temperature,the greater effect of the flue gas temperature on the length of the wet plume;the larger the outlet radius of the chimney,the longer the wet plume.