Journal of the Korean Industrial and Engineering Chemistry, Vol.6, No.6, 1021-1028, December, 1995
삼중 다공판형 맥동탑에서 액적크기 및 분포에 대한 연구
A Study on Drop Size and Its Distribution in Pulsed Column with Three Manifold Perforated Plate Type
초록
삼중 다공판형 맥동탑에서 평균액적 크기와 분포에 대한 연구를 수행하였다. 맥동탑은 직경이 4.65cm이고, 유gy 높이가 6m이며, 다공판의 bolt 크기가 2.5mm이며, 개공비가 30%인 삼중 다공판으로 구성되어 있다. 실험은 물질전달이 있는 계와 없는 계에서 실시하였으며 물질 전달이 있는 계로는 40% TBP(Tri-butyl phosphate)/dodecan-2N HNO3UNH(uranyl nitrate hydroxides) 용액을, 물질전달이 없는 계로는 40% TBP(tri-butyl phosphate)/dodecan-2N HNO3 수용액을 선정하여 수행하였다. 맥동탑 내에서의 평균 액적 크기 및 분포는 사진촬영으로 측정하였다 맥동탑 내에서 액적크기 분포는 Mugele-Evans 분포를 이용하여 해석할 수 있었다. 액적의 평균 크기는 맥동탑 높이, 맥동속도, 분산상 공탑 속도가 증가할수록 감소하였으며, 연속상 공탑 속도에는 거의 영향을 받지 않았다. 또한 연속상에서 분산상으로 물질전달이 있는 경우가 물질전달이 없는 경우보다 평균액적크기가 더 크며, 삼중다공판형 맥동탑 내의 평균액적크기가 표준형 맥동탑 내의 평균액적크기보다 큰 값을 가졌다.
This work has been carried out to study the mean diameter of drop and its distribution in a pulsed column with three manifold plate type. The column, which is 4.65cm of diameter and 6m of effective height, is consisted of three manifold old perforated plate groups having 30 % of free area and 2.5mm of hole diameter. The experiments were performed for systems with and without mass transfer, and then, the experimental systems were chosen UNH(uranyl nitrate hydroxides)- 40% TBP (tri-butyl-phosphate)/dodecan and 2N HNO3-40% TBP/dodecan, respectively. The droplet size in pulsed column was determined by photographic method. The droplet size distribution can be interpreted by Mugele and Evans distribution. The mean size of droplets has been decreased with increasing of pulsed column heigh, pulsed velocity, and dispersed velocity, but it has been affected weakly by continuous flow rates. And also, the mean size of droplet with mass transfer was larger than that without mass transfer, and the mean size of droplet in pulsed column with three manifold plate type was larger than that in pulsed column with standard plate type.
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