Effect of Cake Compression on the Performance of Centrifugal Dewatering
學年 95
學期 1
出版（發表）日期 2006-10-01
作品名稱 Effect of Cake Compression on the Performance of Centrifugal Dewatering
作品名稱（其他語言）
著者 黃國楨; Hwang, Kuo-jen; Chou, Ku-haw
單位 淡江大學化學工程與材料工程學系
出版者 Taylor & Francis
著錄名稱、卷期、頁數 Drying Technology 24(10), pp.1263-1270
摘要 The effect of cake compression on the centrifugal dewatering is investigated under various rotating speeds and different kinds of cakes. A numerical method is proposed to estimate the capillary pressure and cake permeability under various cake saturations. The most dewatering in this study are operated at the funicular state of cake. The cake permeability decreases, while the capillary pressure increases rapidly, with the decrease of cake saturation during a centrifugal dewatering. The cake saturation can also be simulated once the relations among capillary pressure, cake permeability, and cake saturation are known. The deviations between simulated saturations and experimental data for compressible talc cakes are less than 2%. The centrifugal dewatering of compressible cake includes two mechanisms, the water squeeze due to cake compression and the centrifugal drainage due to pressure difference. The role of cake compression is dominant at the initial 500 s of the dewatering period, and these two factors are almost equal in magnitude as well as in importance when the cake approaches its equilibrium saturation. The porosity and compressibility of cake play the major roles in determining the equilibrium cake saturation. The equilibrium saturation of the compressible talc cake with a lower porosity is much higher than that of incompressible Al2O3 cake under a fixed rotating speed. An increase in rotating speed (centrifugal effect) results in a lower equilibrium cake saturation for either compressible or incompressible cakes; however, the increase in rotating speed is more efficient for an incompressible cake in the centrifugal dewatering.
關鍵字 Cake compression;Cake saturation;Capillary pressure;Centrifugal dewatering
語言 en
ISSN 0737-3937
期刊性質 國內
收錄於
產學合作
通訊作者
審稿制度 否
國別 TWN
公開徵稿
出版型式 ,電子版
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