https://scholars.lib.ntu.edu.tw/handle/123456789/407660
標題: | Filtration of highly compactible filter cake: Variable internal flow rate | 作者: | Lee D.J. Ju S.P. Kwon J.H. Tiller F.M. |
公開日期: | 2000 | 卷: | 46 | 期: | 1 | 起(迄)頁: | 110-118 | 來源出版物: | AIChE Journal | 摘要: | Conventional analyses used to interpret filtration data assume a constant internal liquid flow rate (q(L)) and a negligible solid velocity (the constant-q(L) approximation). To interpret such data, the upper bounds of errors to estimate £\(av) and k(av) were analytically derived by the constant-q(L) approximation. The solution of the filtration model that incorporates a nonzero solid velocity was then analytically derived. When filtering a highly compactible filter cake, the cake was first compacted toward the filter medium that forms a skin layer and, in doing so, rapidly reaches the steady-state distribution predicted by the constant-q(L) approximation. Except at the first stage of the filtration, the approach of Tiller et al. (1999) is valid for interpreting filtration data of a highly compactible filter cake. Furthermore, the constant-q(L) approximation provides the upper limit of errors in terms of estimating cake characteristics regardless of the solid velocity effect.Conventional analyses used to interpret filtration data assume a constant internal liquid flow rate (qL) and a negligible solid velocity (the constant-qL approximation). To interpret such data, the upper bounds of errors to estimate £\av and kav were analytically derived by the constant-qL approximation. The solution of the filtration model that incorporates a nonzero solid velocity was then analytically derived. When filtering a highly compactible filter cake, the cake was first compacted toward the filter medium that forms a skin layer and, in doing so, rapidly reaches the steady-state distribution predicted by the constant-qL approximation. Except at the first stage of the filtration, the approach of Tiller et al. (1999) is valid for interpreting filtration data of a highly compactible filter cake. Furthermore, the constant-qL approximation provides the upper limit of errors in terms of estimating cake characteristics regardless of the solid velocity effect. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/407660 | ISSN: | 00011541 | DOI: | 10.1002/aic.690460114 |
顯示於: | 化學工程學系 |
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