Scale-Up Study on the Performance of Annular Pulsed Disc-and-Doughnut Columns

ABSTRACT

Based on the previous work of the hydraulic, axial mixing, and mass-transfer performance of an annular pulsed disc-and-doughnut column (APDDC), the effects of scaling-up on its performance were studied in APDDCs with different annular space widths. The effect of scaling-up on holdup was discussed, and a more universal correlation was established. The effect of scaling-up on the Sauter drop diameter could be expressed by the previous obtained correlation. The effects of scaling-up on both the flooding holdup and throughput were mainly reflected in the correlation of the Sauter drop diameter. The equations of operating regimes were also independent of the scaling-up effect as demonstrated by experimental data. The scaling-up effects on the axial-dispersion coefficient of the continuous phase, the mass-transfer coefficient, and the height of a transfer unit were also discussed.

KEYWORDS:

• Annular pulsed disc-and-doughnut column (APDDC)
• axial mixing performance
• hydraulic performance
• mass-transfer performance
• scale-up

Funding

We gratefully acknowledge the support of the National Natural Science Foundation of China (21376132) for this investigation.

Additional information

Funding

We gratefully acknowledge the support of the National Natural Science Foundation of China (21376132) for this investigation.