高粘度物料滤饼沟流的形成与特征  

Formation and characteristic of cake ditches with huge capillaries in press filtration

作　　者：杨占平 徐坦 朱企新[2] 

机构地区：[1]南通醋酸纤维有限公司,江苏南通226008 [2]天津大学化工学院,天津300072

出　　处：《化学工程》2005年第1期36-39,共4页Chemical Engineering(China)

摘　　要：描述和分析了滤饼横向沟流和纵向大毛细管的形成和发展特征,横向沟流以毛细管入口处结构剪切破坏为基本特征,而纵向大毛细管的形成及进一步扩大,对过滤质量立即产生破坏性影响。滤饼二端的压差与流量过大或剧烈波动是这 2种特殊现象的根本原因。通过对毛细管中非牛顿流动分析,滤饼二端压差与流量的乘积与毛细管内的剪切应力、剪切速率的关系得到初步明确。Descriptions and analysis of how cake ditches with huge capillaries develop are given as special (phenomena) in high viscosity non-Newtonian cake filtration.Cake ditches with huge capillaries feature remarkable capillary destructions and expansions which occur either when a product (differential pressure times cake flow rate) is relatively too high or too variable, and have a strong and negative impact on filtrate quality immediately. The (product) is correlated with capillary shear stress and shear rate based on capillary non-Newtonian capillary solution.

关 键 词：横向沟流 纵向大毛细管 非牛顿流动 过滤精度 

分 类 号：TQ028.53[化学工程]