Influence of back mixing on the convective drying of residual sludges in a fixed bed.
Influence of back mixing on the convective drying of residual sludges in a fixed bed.
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DOI：
10.1016/j.watres.2008.01.020
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发表时间：
2008-05
期刊：
影响因子：
12.8
通讯作者：
A. Léonard;E. Meneses;E. Le Trong;T. Salmon;P. Marchot;D. Toye;M. Crine
中科院分区：
文献类型：
--
作者：
A. Léonard;E. Meneses;E. Le Trong;T. Salmon;P. Marchot;D. Toye;M. Crine
研究了回流混合对两种污泥对流带干燥的影响。污泥挤出物床的膨胀，由于增加添加的干产品进行了量化，通过使用X射线断层扫描。这种非侵入性技术被用来确定床层孔隙率和总交换面积可用于热量和质量传递，增加返混水平。对于相同的干燥通量，干燥床的膨胀导致更高的干燥速率，从而允许减少总干燥时间。在这种情况下，污泥的流变特性是关键特性。
The influence of a backmixing operation on the convective belt drying of two wastewater sludges was studied. The expansion of the sludge extrudates bed due to increasing additions of dry product was quantified by using X-ray tomography. This non-invasive technique was used to determine the bed porosity and the total exchange area available for heat and mass transfers, for increasing levels of backmixing. For a same drying flux, the expansion of the drying bed leads to higher drying rates, allowing a reduction of the total drying time. In this context, rheological properties of the sludges are key properties.