Characteristics of Phase Inversion in Continuous Rotating Disc Column (RDC)

• Main Authors: Chaur-Shyan Hwang, 黃朝賢
• Other Authors: Chien-Lih Chiang
• Format: Others
• Language: zh-TW
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/35766355239650849542

碩士 === 國立成功大學 === 化學工程研究所 === 83 === From the experimental results,dynamic hold-up increased gradually with increasing dispersed phase flowrates and rotor speeds.Besides,when the organic phase was the dispersed phase and under the same dispersed phase flowrates,it was found that the dynamic hold-up would be higher with a larger flowrate of the continuous phase.However this behavior was not significant when water was the dispersed phase.A maximum hold-up was found near the center of the column.In addition,the droplet characteristic velocity model can be successfully applied to describe the relationship between the dynamic hold-up and the two phase flowrates.With organic solvent as the dispersed phase n equals to one,while n equals to zero when water was the dispersed phase.With organic solvent as the dispersed phase,it was found that the happening of phase inversion starts from the second stage,and was a cycling process.As the rotor speed increases,the cycle time of phase inversion becomes longer and the points of phase inversion and flooding becomes closer.The lower the flowrate of the continuous phase,the shorter the cycle time of phase inversion.Flooding occurs before the happening of phase inversion when water was the dispersed phase.(omit)