摘要
采用安东帕流变仪对不同温度下含油污泥的流变性质进行测量,并通过拟合幂律方程得到相关流变参数。基于其流变特性,以空气-含油污泥为介质采用数值模拟方法研究了含油污泥温度以及反应器结构对气液两相流场、局部气含率分布以及通气搅拌功率的影响。结果表明:随着含油污泥温度升高,搅拌桨对液相扰动范围趋广,气含率分布趋于分散,气液两相混合程度愈加均匀,通气搅拌功率下降明显;对比4种不同反应器结构,双层桨分散性能最佳,液相平均流速最高,速度均匀度指数最低,在通气搅拌功率适宜的情况下其混合性能最佳。
The rheological properties of oily sludge at different temperatures were measured by Anton Paar rheometer,and the relevant rheological parameters were obtained by fitting the power-law equation.Based on the rheological characteristics of oily sludge,the effects of oily sludge temperature and reactor structure on gas-liquid phase flow field,local gas holdup distribution and stirring power were studied by numerical simulation with air-oily sludge as the medium.The results showed that with the increase of the temperature of oily sludge,the disturbance range of the stirring paddle to the liquid phase tended to be wider,the distribution of gas holdup tended to be dispersed,the mixing degree of gas and liquid two phases became more uniform,and the aeration stirring power decreased significantly;among the four different reactor structures,the double-layer impeller had the best dispersion performance,the highest average liquid flow rate and lowest velocity uniformity index.Its mixing performance was the best with an appropriate aeration stirring power.
作者
宋健斐
贾智凯
李思源
仝坤
聂凡
SONG Jianfei;JIA Zhikai;LI Siyuan;TONG Kun;NIE Fan(State Key Laboratory of Petroleum Pollution Control,Beijing 102246,China;College of Mechanical and Transportation Engineering,China University of Petroleum,Beijing 102249,China)
出处
《环境工程》
CAS
CSCD
北大核心
2023年第4期101-107,共7页
Environmental Engineering
基金
石油石化污染物控制与处理国家重点实验室开放课题(PPC2020009)。
