摘要
本文利用单液滴蒸发实验研究了预浓缩高盐脱硫废水液滴蒸发特性,比较了高盐废水与普通废水液滴蒸发行为异同,并开展了喷雾蒸发适应性实验。结果表明,液滴蒸发存在收缩-膨胀-再收缩三阶段,高盐废水蒸发速率更低,但因其含水量少,总蒸发时长更短;液滴膨胀和内部气泡生长规律相关,高盐废水呈多气泡长大模式,普通废水呈孤立气泡快速长大模式;环境温度升高可加快废水蒸发,但蒸发产物将在高温下分解;实验工况下高盐废水喷雾蒸发产物含水率低于普通废水。
This paper investigated the evaporation characteristics of pre-concentrated high-salinity desulfurization wastewater droplets.Via single droplet evaporation experiments,similarities and differences in droplet evaporation behaviour between high-salinity wastewater and normal wastewater were compared.Spray evaporation experiments were carried out to validate its performance.The results show there were three stages of droplet evaporation:shrinkage,expansion,and re-shrinkage.For high-salinity desulfurization wastewater,its evaporation rate was slower,but its droplet lifetime was shorter due to the smaller water content.The expansion of droplets was related to the growth pattern of internal bubbles.Droplets of high-salinity wastewater exhibited the simultaneous growth of multiple bubbles,while ordinary wastewater exhibited the rapid growth of an isolated bubble.Increasing the ambient temperature would accelerate droplet evaporation,but the evaporation products may decompose under high temperature.In the pilot test,water content in the evaporation product from the high-salinity wastewater was lower than that of normal wastewater.
作者
詹凌霄
陈恒
周浩
杨林军
孙宗康
ZHAN Lingxiao;CHEN Heng;ZHOU Hao;YANG Linjun;SUN Zongkang(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,School of Energy and Environment,Southeast University,Nanjing,210096,China;Guangdong Electric Power Development Co.,Ltd.,Guangzhou,510000,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2023年第8期2294-2301,共8页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.52076046)
关键词
脱硫废水
液滴
蒸发特性
浓缩
喷雾蒸发
desulfurization wastewater
droplet
evaporation characteristic
concentration
spray evaporation
作者简介
詹凌霄(1997-),男,博士研究生,主要从事高盐废水喷雾蒸发研究;通信作者:杨林军,教授,E-mail:ylj@seu.edu.cn。
