粉煤灰-氢氧化钠浆液槽放大准则数值模拟研究  

Computation study of scale-up laws for fly ash-sodium hydroxide slurry tank

作　　者：刘丽艳[1] 李晨辰[1] 朱国瑞[1] 张战军 孙俊民 谭蔚[1] 

机构地区：[1]天津大学化工学院,天津300072 [2]大唐国际再生资源开发有限公司,内蒙古呼和浩特010206

出　　处：《现代化工》2014年第2期148-151,共4页Modern Chemical Industry

基　　金：国家自然科学基金项目(21376167);国家"十一五"科技支撑计划项目(2009BAB49B00)

摘　　要：粉煤灰-氢氧化钠浆液槽固液两相混合效果对整条高铝粉煤灰制备氧化铝工艺生产线的顺利运行至关重要,以某单位生产现场浆液槽为基准建立了3个几何相似的搅拌槽模型,应用多相流模型对搅拌槽固液悬浮的放大准则进行了研究。模拟计算了达到均匀悬浮时搅拌槽内各项性能参数的变化情况,分析了不同放大方法的效果,计算得到一种适合于粉煤灰-氢氧化钠浆液槽固液悬浮的放大判据N∝D-0.842,在节省功耗的基础上可以使搅拌过程较好地重现。The mixing effect in fly ash-sodium hydroxide slurry tank is critical for the smooth running of alumina preparation production line.Three geometrically similar stirring tank models are built according to the slurry tank in site and multiphase flow model is used to study the scale-up laws of solid-liquid suspension in them.The variations of various performance parameters achieving uniform suspension are simulated and the effects of different scaling laws are analyzed.Then a scale-up criterion suitable for solid-liquid suspension in fly ash-sodium hydroxide slurry tank is put forward,that is N∝D-0.842,which can reproduce the mixing process well and save power at the same time.

关 键 词：浆液槽 几何相似 固液悬浮 数值模拟 放大准则 

分 类 号：TQ027.2[化学工程] TQ019