摘要
相对于主路烟道蒸发,旁路烟道蒸发烟气温度更高、烟气量调节更灵活,成为脱硫废水零排放技术研究的焦点。基于含盐液滴蒸发模型,通过数值模拟分析了导流措施、喷嘴布置方式、喷嘴层数、烟气温度、烟气湿度以及雾滴粒径等因素对旁路烟道中脱硫废水蒸发特性的影响。结果表明,高温环境下烟气湿度对雾滴蒸发过程的影响基本可以忽略;采取导流措施在改善流场的同时,有效防止了雾滴碰壁现象的发生;合理布置喷嘴可以在增大雾滴蒸发速率的同时,降低雾滴碰壁概率;随着喷嘴层数的增加,雾滴蒸发速率不断加快;随着烟气温度的升高以及雾滴粒径的减小,雾滴的蒸发速率不断上升。
Compared with the evaporation treatment in the main flue,the desulfurization wastewater evaporation disposal in the bypass flue has advantage of higher gas temperature and more flexible gas volume control,and it has become the focus of research on zero emission technology of desulfurization wastewater.Based on the salt droplet evaporation model,the effects of guiding measures,nozzle arrangement,nozzle layers,flue gas temperature,flue gas humidity and droplet size on the evaporation characteristics of desulfurization wastewater in bypass flue were numerically analyzed.The results showed that the influence of flue gas humidity on droplet evaporation process in high temperature environment could be ignored;guiding measures effectively prevented the occurrence of droplet wall collision while improving the flow field;reasonable nozzle layout increased the droplet evaporation rate and reduced the probability of droplet wall collision;with the increase of nozzle layers,the droplet evaporation rate accelerated;with the increase of flue gas temperature and the decrease of droplet size,the droplet evaporation rate increased.
作者
叶兴联
苏寅彪
安希忠
王帅
张楚城
YE Xinglian;SU Yinbiao;AN Xizhong;WANG Shuai;ZHANG Chucheng(School of Metallurgy,Northeastern University,Shenyang Liaoning 110819;Fujian Longking Co.,Ltd.,Longyan Fujian 364000)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2021年第11期1388-1393,共6页
Environmental Pollution & Control
基金
福建省自然科学基金资助项目(No.2020J06045)。
关键词
脱硫废水
旁路烟道
流动
蒸发特性
数值模拟
desulfurization wastewater
bypass flue
flow
evaporation characteristics
numerical simulation
