Three-phase circulating fluidized bed mass transfe -

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Three-phase circulating fluidized bed mass transfer characteristics of

), approximately taken as Ig'cm; u of a fluid velocity (Ⅲ · s); to , a biological particle diameter (cm), in this experiment, the biological film thickness is 40 ~ 60tan, ceramic diameter 1.0n -an, is therefore desirable d = 1.05mm; a fluid viscosity coefficient (g / (cm · s)), similar to the viscosity coefficient is taken as water . By ( 9 ) can be obtained outside the cylinder R = 128. According to equation ( 3 ), in the ceramic dosage at around 100g · L a , = 1.65x = 11.5%. In this experiment, the ceramic cast about 10% ( by volume) . Ie = 785% , ( 7 ) where , G / ((1 a day e )) = 595.8 , therefore, = 4 Zhongjia Xi et al: Circulating - + tl fluidized bed mass transfer characteristics of 3571.77 ( 5958 ) And (t0) , we obtain k = (· D Available : fluidized bed mass transfer coefficient = 1 × 10_. m · s I.4 Conclusion 1) 1TFB under different carrier concentrations eg broadly consistent with the relationship between Ug : eg = mouth Ug.2) for 1TFB,[link widoczny dla zalogowanych], The turbulent large , the traditional diffusion model is not easy to solve , therefore, quantitative research 1TFB The transfer is necessary , it is directly related to the study of biological degradation kinetics .3 ) single -component solution in the IqYB Mass transfer coefficient k = (JD'Dp ~) / (ffdp). HA in this experiment, the solution to the ceramic carrier mass , the mass transfer coefficient of 1 × 10 ~ m · s ~.

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