摘要
错流碟片旋转超重力场反应器能够有效强化多相间化学反应,在超重力场中流体流动形式复杂,且液体的分布形态严重影响气液接触。通过条件简化采用因次分析方法建立了错流碟片旋转超重力场中液滴直径变化的数学模型,用三维激光多普勒衍射仪测试液滴的体积-表面积平均直径d32和变化规律。由模型分析和实验测试得出,随碟片转速增加液滴直径减小;随输入液体流量增大液滴直径增大;随入口气体流量增加,碟片空间和壳体空间液滴直径都变小。增加碟片间距液滴直径减小,有利于液体的雾化,减少液滴聚并。壳体空间液滴直径大于碟片空间的液滴直径,有不连续液丝和破碎液膜产生。模型计算和实验测试变化趋势基本一致。
The reactor of cross-current rotary discs supergravity field can effectively enhance the heterogeneous chemical reaction. The forms of fluid flow are complex in rotary supergravity field, and the gas-liquid contact is seriously influenced by the liquid state. Based on the condition simplified and the dimensional analysis, the mathematical model of droplet diameter variations in cross-current rotary discs supergravity field was set up; the droplet volume-surface average diameter d32 was measured and variations were recorded by means of 3-dimensional Laser-Doppler. Through the model analysis and experiments, the result shows that the droplet diameter decreases with the increasing of rotational speed of discs ; the droplet diameter increases evidently with the increasing of feed fluid flow; the droplet diameter decreases with the increasing of inlet gas flow; the droplet diameter decreases with increasing interval distance between discs, which can improve the liquid mist and prevent the droplet secondary coalescence. The droplet diameter in the reactor shell space is bigger than that in discs space. The discontinuous ligament and the broken membrane are formed in the shell space. The results of theoretical calculation basically correspond with the experimental measurement.
出处
《化学工程》
CAS
CSCD
北大核心
2009年第5期26-29,共4页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(50074018)
安徽省科技攻关资助项目(06012146H)
关键词
错流
碟片
旋转超重力场
液滴
cross-current
disc
rotating supergravity field
droplet
