水汽相变过饱和场的实验测量和数值计算  

Experimental Measurement and Numerical Calculation of Supersaturated Water Vapor Environment

作　　者：孟强[1] 张军[1] 于燕[1] 徐俊超[1] 钟辉[1] Meng Qiang Zhang Jun Yu Yan Xu Junchao Zhong Hui(Solar Energy Technology Research Center, Southeast University, Nanjing 210096, China)

机构地区：[1]东南大学太阳能技术研究中心,南京210096

出　　处：《发电设备》2016年第6期363-367,共5页Power Equipment

基　　金：国家自然科学基金资助项目(51576043);国家重点基础研究发展计划(973计划)资助项目(2013CB228504)

摘　　要：针对湿法脱硫后高湿烟气,采用冷却的方式在相变室内建立水汽过饱和环境。设计了一套间接测量水汽过饱和度的实验装置并建立了相变室内传热传质计算模型,分别从实验和理论计算两方面探讨了冷却水温度对构建过饱和氛围的影响。二者结果均表明:冷却湿法脱硫后高湿烟气可以有效构建水汽相变过饱和水汽氛围,并且随着管壁温度的降低,相变室内过饱和水平明显增强。从数值计算结果可以看出:在相同管壁温度下,相变室内最大过饱和度发生在靠近管壁附近处;沿着相变室轴向方向,过饱和度水平则呈现先增大后减小的趋势。The highly humid gas from wet flue gas desulfurization （WFGD） system was cooled to build the supersaturated vapor environment in condensation chamber. An experimental setup was designed for indirect measurement of the supersaturation and a model was established for calculation of heat and mass transfer in the condensation chamber, so as to theoretically and experimentally analyze the effects of cooling water temperature on the supersaturation. Both results show that cooling the highly humid gas of WFGD system can effectively build the supersaturated environment, and with the decrease of tube wall temperature, the supersaturation in condensation chamber increases obviously. Calculation results indicate that the highest supersaturation appears in the area near chamber wall under the condition of same wall temperature. The supersaturation first increases and then decreases along axial direction of the chamber.

关 键 词：湿法脱硫 冷却 水汽过饱和环境 过饱和度测量 数值计算 

分 类 号：TK222[动力工程及工程热物理—动力机械及工程]