卧式双轴固液两相均浆设备流场试验及数值模拟  

Flow Field Test and Numerical Simulation of Horizontal Biaxial Solid-Liquid Two-Phase Homogenizing Equipment

作　　者：孙建成 SUN Jiancheng(Sinopec Group Health,Safety and Environmental Management Department,Beijing 100728,China)

机构地区：[1]中国石油化工集团有限公司健康安全环保管理部,北京100728

出　　处：《当代化工》2024年第7期1730-1735,共6页Contemporary Chemical Industry

基　　金：山东省自然科学基金项目(项目编号:ZR201911040137)。

摘　　要：溶剂萃取工艺广泛应用于石油污染土壤修复,机械搅拌设备的土壤匀浆化效果对污染土壤修复影响显著。针对3 m3处理工况,对比分析了斜桨式与铲式2种卧式搅拌设备,采用内流场可视化试验与流场数值模拟结合的方法,研究了2种型式搅拌器与搅拌转速的固液混合效果。结果表明:在相同转速下,与斜桨式搅拌器相比,铲式搅拌器土壤体积分数方差更小,底部固相沉积更少,应力显著降低,综合性能更好;对于铲式搅拌器,随着搅拌器转速的提高,固液两相混合效果增强,搅拌装置应力、应变略微增大,超过30 r·min-1后,固液两相混合效果基本不再变化,可作为推荐的工作转速。Solvent extraction technology is widely used in the remediation of petroleum-contaminated soil,and the soil homogenization effect of mechanical stirring equipment has a significant impact on the remediation of contaminated soil.In this paper,two types of horizontal mixing equipment were compares and analyzes,including the inclined paddle type and the shovel type,for a 3 m3 treatment condition.Using a combination of internal flow field visualization experiments and numerical simulation,the solid-liquid mixing effects of the two types of agitators and the stirring speed were studied.The results showed that at the same rotational speed,compared with the inclined paddle mixer,the shovel mixer had a smaller variance in soil volume fraction,less solid deposition at the bottom,significantly lower stress,and better overall performance;for shovel-type agitators,with the increase of agitator speed,the solid-liquid two-phase mixing effect increased,and the stress and strain of the mixing device slightly increased.After exceeding 30 r·min-1,the solid-liquid two-phase mixing effect did not change,which can be used as the recommended working speed.

关 键 词：卧式搅拌器 固液两相流 流固耦合 数值模拟 可视化试验 

分 类 号：TQ016[化学工程]