One‐dimensional model of vacuum filtration of compressible flocculated suspensions
One‐dimensional model of vacuum filtration of compressible flocculated suspensions
复制标题
可压缩絮凝悬浮液真空过滤的一维模型
DOI：
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发表时间：
2010
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通讯作者：
P. Scales
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作者：
A. Stickland;R. D. Kretser;P. Scales
Anthony D. Stickland、Ross G. de Kretser 和 Peter J. Scales化学与生物分子工程系，颗粒流体处理中心，墨尔本大学，VIC 3010，澳大利亚DOI 10.1002/aic.121942010 年 2 月 1 日在线发布于 Wiley 在线图书馆 (wileyonlinelibrary.com)。这项工作详细介绍了可压缩絮凝悬浮液真空过滤过程中可能发生的不同过程的一维建模。根据所施加的压力和初始固体浓度（相对于压缩屈服应力和气液界面处的有效毛细管压力的材料特性）的操作条件，脱水过程经历了滤饼形成、固结和/或去饱和的组合。提出了基于压缩流变学方法的这些过程的数学模型，并概述了适当的解决方法。给出了不同操作条件下使用常规材料特性的结果，以说明三种脱水过程。该方法为进一步了解去饱和过程中的二维和三维效应（例如开裂和壁分离）奠定了理论基础。
Anthony D. Stickland, Ross G. de Kretser, and Peter J. ScalesDept. of Chemical and Biomolecular Engineering, Particulate Fluids Processing Centre,The University of Melbourne, VIC 3010, AustraliaDOI 10.1002/aic.12194Published online February 1, 2010 in Wiley Online Library (wileyonlinelibrary.com).This work details the one-dimensional modeling of the different processes that mayoccur during the vacuum filtration of compressible flocculated suspensions. Dependingon the operating conditions of the applied pressure and the initial solids concentrationrelative to the material properties of the compressive yield stress and the effective cap-illary pressure at the air–liquid interface, the dewatering process undergoes a combi-nation of cake formation, consolidation, and/or desaturation. Mathematical models forthese processes based on the compressional rheology approach are presented andappropriate solution methods outlined. Results using customary material properties aregiven for different operating conditions to illustrate the three dewatering processes.This approach lays the theoretical basis for further work understanding two- andthree-dimensional effects during desaturation, such as cracking and wall detachment.