Bromine is one of an important chemical raw material. The effects of absorption time, aqueous bromine solution temperature, stripping solution concentration and flow and the other operating conditions on membrane absorption performances of aqueous bromine solution were studied, polyvinylidene fluoride (PVDF) hollow fiber membranes were used, and NaOH was a stripping solution. The results showed that absorption rate of bromine increased with increasing of absorption time, feed temperature and mass transfer coefficient was consistent with Arrhenius relationship for membrane absorption process. The concentration of stripping solution was increased from 0.003mol/L to 0.01mol/L, mass transfer coefficient increasing from 4.75×10-4cm/s to 6.02×10-4cm/s, and membrane flux increasing from 2.4×10-3kg/(m2.h) to 3×10-3kg/(m2.h) accordingly. The effect of fluid dynamic conditions of stripping side on membrane flux for membrane absorption was not obvious.
Regression orthogonal experiment was adopted to develop the regression equation of membrane absorption of aqueous bromine solution for the first time, through which mass transfer performances under other different hydromechanics conditions could be predicted and optimized, and significant factors of aqueous bromine solution membrane absorption was determined. When feed temperature was 50℃, feed flow rate was 22.24cm/s, feed concentration was 220mg/L, stripping flow rate was 2L/h and stripping concentration was 0.01mol/L, aqueous bromine solution mmembrane absorption flux 6.17×10-3kg/（m2•h）was obtained.