抄録
In order to obtain a reasonable bubble column to separate surface active metal chelates, liquid mixing characteristics of DBS solution in a 6-stage counter current bubble column have been investigated. From the delta-response analysis by measuring the electrical conductivity at each stage, it proved that back flow modelthrough perforated plates was applicable to the system with good approximation.
Back flow ratio took a clear muximum value at a certain gas velocity in DBS solution rather than in pure water, depending on gas velocity, liquid velocity and dimensions of perforated plates such as diameter of the hole and open area ratio. The autnors introduced a conceptual mechanism that the back flow resulted from the viscous shear force at gas-liquid interface similar to a counter current wetted wall colum, and obtained simple relations of (rG/ro) 2 with Reynolds number, Galilei number and open area ratio.
