间接空冷三塔合一的数值模拟  

A Numerical Simulation of Indirect Air Cooling with Three-towers-in-one

作　　者：蒋晓锋[1] 马欣敏[1] 朱一飞[1] 刘明勇[1] 黄隽佳[1] 

机构地区：[1]上海发电设备成套设计研究院,上海200240

出　　处：《汽轮机技术》2015年第2期128-132,共5页Turbine Technology

摘　　要：以600MW间接空冷设备为例,采用数值模拟方法分析了三塔合一的污染物扩散、环境影响、结构优化问题。结果表明:受环境温度影响,空冷塔传热量冬季最高,夏季最低;随环境风速的增加,迎风面传热增强,侧风面与背风面传热减弱;与烟囱相比,采用空冷塔排烟,污染物扩散更广、受环境风影响更小;脱硫塔排烟口越高、口径越小,烟气扩散越广;外部挡风墙可减小环境风对塔侧的压制,内部挡风墙可削弱塔内热空气的旋转。The 600 MW indirect air cooling device as an example,the problems of three-towers-in-one about pollutant diffusion,environmental impact,structural optimization were analyzed with numerical simulation method. Results illustrate that： due to influence of environment temperature,air cooling tower heat transfer is highest in winter,lowest in summer;with increase of wind speed,heat transfer of the windward surface enhance,heat transfer of side surface and leeward surface decrease; compared with chimney,using air cooling tower remove flue-gas makes pollutant diffusion wider and less environment influence; gas outlet of desulfurization tower more high and less,flue-gas spread more widely; the external windbreak wall can reduce the suppress of wind on the side of the tower,the internal windbreak wall can weaken the rotation of hot air in tower.

关 键 词：间接空冷 三塔合一 污染物扩散 环境影响 挡风墙 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]