Image analysis of X‐ray microtomograms of soft materials during convective drying
Image analysis of X‐ray microtomograms of soft materials during convective drying
复制标题
对流干燥过程中软材料的 X 射线显微断层图像分析
DOI：
10.1046/j.1365-2818.2003.01242.x
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发表时间：
2003
影响因子：
2
通讯作者：
M. Crine
中科院分区：
文献类型：
--
作者：
A. Léonard;S. Blacher;P. Marchot;J. Pirard;M. Crine
X射线显微断层扫描用于研究干燥处理过程中软质材料的结构演变。采用原始图像处理算法对垂直投影和重建的横截面图像进行处理，以量化不同干燥阶段的纹理。测量是在灰度级和二值图像上进行的。结果表明，X射线微层析成像在干燥研究领域是一种很有前途的工具。它可以用来确定内部水分分布，并以准确和非破坏性的方式跟踪裂缝的发展和收缩。这些信息对于验证干燥模型至关重要。废水污泥被用作测试材料来评估所提出方法的有效性。根据环境法规，这些污泥的管理（通常包括干燥阶段）将在未来几年成为一项挑战。对两个污水处理厂收集的样品进行了调查。他们通过X射线显微断层扫描的分析揭示了两种不同的干燥行为，说明污泥干燥是一个复杂的单元操作，对材料的生产方式非常敏感。
X‐ray microtomography is used to explore the textural evolution that soft materials undergo during a drying treatment. An original image processing algorithm is applied to vertical projections and reconstructed cross‐section images in order to quantify the texture at different stages of drying. Measurements are performed both on grey‐level and on binary images. It is shown that X‐ray microtomography is a very promising tool in the field of drying investigations. It can be used to determine internal moisture profiles, and to follow crack development and shrinkage in an accurate and non‐destructive way. This information is crucial to validate drying models. Waste‐water sludges are used as test materials to assess the validity of the proposed methodology. The management of these sludges, often including a drying stage, will become a challenge in the forthcoming years in accordance with environmental regulations. Samples collected in two waste‐water treatment plants are investigated. Their analysis by X‐ray microtomography brings to the fore two different drying behaviours, illustrating that sludge drying is a complex unit operation very sensitive to the way the material is produced.