摘要
介绍了中空纤维膜接触器在气体分离、净化以及精馏结构填料替代等方面研究的最新进展,并结合笔者所进行的实验工作,从膜接触器中体系的流动方式、壳程挡板、纤维膜组器的填充密度等方面详细探讨了中空纤维膜接触器的空间结构对于过程传质和分离效果的影响.分析结果表明,在气液接触分离过程中,为有效提高膜接触分离过程的传质系数,大多数研究采用了平流中的逆流方式;壳程挡板的增设可以促进过程的分离效果,但其作用并非始终随挡板数量的增加而增强;膜组器填充密度对壳程传质的影响明显,且大多数实验结果表明,过程分离的总传质系数随填充密度的增加而减小.
Recent progresses of hollow fiber membrane contactor （HFMC） used in gas separation and as distillation packing were reported in this paper. Compared with the results of recent experiments, the effect of membrane contactor＇ s structural factors, including flow direction, shell side baffles and the relative mass transfer were analyzed. Results showed that the counterfbw was mostly chosen to improve separation efficiency and shell side baffles had an obvious effect on mass transfer, although many more baffles didn＇ t seem to work better. The overall mass transfer coefficients in most experiments decreased with the increase of module fiber packing fraction, which presented a strong relationship between shell mass transfer and fiber packing fraction.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2008年第4期53-58,共6页
Membrane Science and Technology
基金
国家自然科学基金资助项目(20476096)
浙江省科技计划重点项目(2006C23067,2005C33040)
关键词
中空纤维膜接触器
空间结构
挡板
填充密度
传质
hollow fiber membrane contactor
structure
baffle
fiber packing fraction
mass transfer
