气液共存区域温湿度场的测量及液相分布的表征方法  

Measurement of Temperature-Humidity Fields and Characterization of Liquid Phase Distribution in Gas-Liquid Regions

作　　者：高继慧[1] 陈国庆[1] 龚泽儒[1] 赵海兵[1] 刘加勋[1] 

机构地区：[1]哈尔滨工业大学燃烧工程研究所,哈尔滨150001

出　　处：《动力工程》2009年第11期1041-1046,共6页Power Engineering

基　　金：国家"十一五"重点科技支撑计划资助项目(2006BAA01B04);国家高技术研究发展计划资助项目(2007AA05Z307)

摘　　要：分析了喷雾干燥器内气液共存区域烟气湿度的表征方法，设计了可实现多点同步采集的湿球温度测量装置和试验平台，进行了温湿度场测量方法的研究．结果表明：在干球温度为90～120℃、湿球温度为40～60℃的反应器工作区间内，可以采用湿球温度定性表征烟气湿度的变化；增湿操作进行后，存在30～40s的湿球温度值稳定测量时间；接近测量对象湿球温度的增湿水温有利于减少测量干扰；与单点测量结果对比，液相稠密区和稀疏区均较吻合；通过对比分析裸电偶测量值与湿球温度，可定性获得被测截面的液相分布特征．By analyzing the characterization way for flue gas humidity in gas-liquid regions of a spray dryer, a multipoint synchronous data acquisition wet-bulb temperature measuring set was developed to study the measurement of temperature-humidity fields. Results show that within the range of dry-bulb temperature from 90 ℃ to 120 ℃ and wet-bulb temperature from 40℃ to 60 ℃C, variation of flue gas humidity can be qualitatively characterized by the wet-bulb temperature, which will be kept relatively stable for 30-40s after humidifying performance eompleted; the closer the humidifying water temperature getting to the wetbulb temperature, the less the measurement error will be; the results of multi-point measurement agree well with that of single-point measurement in both the dense and sparse liquid phase regions; the liquid phase distribution characteristics of measured section can be qualitatively obtained by comparing the temperature of naked thermocouple with that of wet-bulb.

关 键 词：喷雾干燥 湿度测量 干湿球 热电偶 液相分布 气液共存区 

分 类 号：X701.3[环境科学与工程—环境工程]