A comparison of filtration characterisation devices for compressible suspensions using conventional filtration theory and compressional rheology

A comparison of filtration characterisation devices for compressible suspensions using conventional filtration theory and compressional rheology
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使用传统过滤理论和压缩流变学对可压缩悬浮液的过滤表征装置进行比较

DOI:
10.1016/j.powtec.2019.01.056
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发表时间:
2019
期刊:
影响因子:
5.2
通讯作者:
A. D. Stickland
A. D. Stickland
中科院分区:
工程技术2区
文献类型:
--
作者:
E. Höfgen;S. Kühne;U. A. Peuker;A. D. Stickland

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固液分离在许多行业中进行,并在整体工艺效率和产品规格中起着至关重要的作用。为了比较过滤设备的性能或设计新设备,必须确定固液混合物或颗粒悬浮物的脱水特性。两个理论框架用于描述固液分离,因此分析实验结果,是传统的过滤理论开发的露丝,蒂勒和Shirato和压缩流变框架开发的Buscall,白色和Landman.In本文中,我们比较了表征技术,随着时间的推移,这两种方法的基础上发展。这包括空气驱动Nutsche过滤器、压缩渗透单元和活塞驱动过滤装置之间的比较。测试材料是在其等电点通过吸引性货车德瓦尔斯力凝结的碳酸钙。我们使用三种不同的颗粒尺寸,导致不同程度的可压缩性。结果表明,这些可压缩材料的两个理论框架之间的良好协议。总的来说,这项工作突出了理论和表征技术之间的差异和相似之处,并为良好的实践提供了建议。
Solid-liquid separation is carried out in many industries and plays a crucial role in overall process efficiency and product specification. The dewatering characteristics of solid-liquid mixtures, or particulate suspensions, have to be determined to compare filtration equipment performance or to design new equipment. Two theoretical frameworks used to describe solid-liquid separation, and therefore analyse experimental results, are the conventional filtration theory developed by Ruth, Tiller and Shirato and the compressional rheology framework developed by Buscall, White and Landman.In this paper, we compare the characterisation techniques that have developed over time based on these two approaches. This includes a comparison between an air-driven Nutsche Filter, a Compression-Permeability cell and a piston-driven Filtration Rig. The test material is calcium carbonate coagulated by attractive Van der Waals forces at its isoelectric point. We use three different particle sizes, leading to varying degrees of compressibility. The results show good agreement between the two theoretical frameworks for these compressible materials. Overall, this work highlights the differences and similarities between the theories and characterisation techniques alike and gives recommendations for good practice.
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影响因子: 5.2
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