热电厂排烟冷却塔塔型对烟气扩散影响研究  

Effect of Cooling Tower Type on Flue Gas Pollutant Diffusion from Natural Draft Cooling Tower with Flue Gas Injection in Thermal Power Plant

作　　者：马喆[1,2] 李志强 张晓旭[1,2] 张丽娜 MA Zhe;LI Zhiqiang;ZHANG Xiaoxu;ZHANG Lina(Tianjin Environmental Science Academy,Tianjin 300191,China;Tianjin Key Laboratory for Air Pollution Control,Tianjin 300191,China)

机构地区：[1]天津市环境保护科学研究院,天津300191 [2]天津市大气污染防治重点实验室,天津300191

出　　处：《天津科技》2018年第6期49-53,共5页Tianjin Science & Technology

基　　金：天津市应用基础与前沿技术研究计划;自然科学基金青年项目(13JCQNJC08700)

摘　　要：以国内现有典型的12座热电厂"烟塔合一"排烟冷却塔为研究对象,采用数值风洞模型的方法,对冷却塔下风向流场及湍流强度场进行预测,并比较不同冷却塔的塔型对其空腔区的大小和范围的影响。研究结果显示,利用数值风洞模型可以实现对空腔区产生、变化、破碎至再生成的全过程描述。冷却塔排放的烟气受下风向负压区域影响,会产生引起烟气下洗现象。冷却塔下风向空腔区范围与冷却塔塔型密切相关,细长型冷却塔空腔区相对范围小于粗短型冷却塔。The flow field and turbulence intensity field at down-wind direction of the cooling tower were calculated by the numerical wind tunnel model method and by taking the 12 typical natural draft cooling towers with flue gas injection in thermal power plant as the research subject.The effect of cooling tower type on the size and area of cavity was compared.The numerical wind tunnel model can describe the entire process of the formation,change,breaking and reformation of the cavity area.Under the influence of negative pressure area at down-wind direction of cooling tower,flue gas pollutant diffusion from cooling tower was washed down.The size of negative pressure area at down-wind direction of cooling tower closely relates to the cooling tower type.Relative size of cavity originated from ＂slender＂ cooling tower was obviously less then that originated from ＂stubby＂ cooling tower.

关 键 词：数值风洞模型 烟塔合一 空腔区 

分 类 号：X384[环境科学与工程—环境工程]