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用氮气解吸水中溶解氧,发现了三个在前人研究中未曾提及的重要现象:(1)保持填料外径而扩大内径,平均体积传质系数增大;(2)比表面积大小并不是传质好坏的决定因素;(3)转子填料与旋转床机壳间空腔中液滴表面的传质量,对整个装置中的传质总量,有不可忽略的贡献。据此,建立了基于液体在填料内微粒化,传质同时在填料和液滴表面进行的传质模型。模型计算结果较好地与实验结果吻合,并对上述三个现象作出了合理的解释。进而指出,液体与转子填料层中的连续微粒化所得到的大量液滴表面,是旋转床传质强化的重要因素。
Dissolved oxygen in water with nitrogen desorption found three important phenomena that were not mentioned in previous studies: (1) keeping the outer diameter of the packing expanding while the average volumetric mass transfer coefficient increased; (2) the specific surface area was not (3) The mass transfer of the droplet surface in the cavity between the rotor packing and the rotating bed shell has a non-negligible contribution to the total amount of mass transfer in the whole installation. Based on this, a mass transfer model was established based on the fact that the liquid was atomized and mass-transferred in the filler while the filler and the droplet were on the surface. The model calculation results are in good agreement with the experimental results, and the above three phenomena are reasonably explained. Furthermore, it is pointed out that the surface of a large number of droplets obtained by the continuous micronization in liquid and rotor packing layer is an important factor of mass transfer strengthening in rotating bed.