表面改性塑料填料流体力学及传质性能研究.pdf

第42卷第12期
化学工程
Vol 42 No 12
2014年12月
CHEMICAL ENGINEERING(CHINA)
Dec.2014
表面改性塑料填料流体力学及传质性能研究
刘佳特,胡剑光,戴干策
(华东理工大学化学工程联合国家重点实验室,上海200237)
摘要:采用新的塑料波纹填料改性方法,有效改善填料成膜性,与同等条件下商业填料进行对比。采用氧解析实
验,在直径190mm的有机玻璃塔内,液相喷淋密度10-36m/(m2?h),F因子0.2-3(m/s)(kg/m2)的实验条
件下测定了改性填料及商用填料的流体力学及传质性能。实验结果表明:当液体喷淋密度为10,24,36m2/(ma2·h)
时,在相同的F因子下,改性填料的液相传质单元高度H较商用填料分别降低了29.50%,23.00%以及23.95%
同时改性后压降也相应为商用填料的85.37%,89.71%和88.35%。表明该改性方法在低喷淋密度下对塑料填料
性能提升显著。此外,对实验填料的HM⊥、压降进行了关联,采用狭通道液膜波动理论对填料塔内部液泛进行了探
讨,为塑料填料的工业应用提供了设计基础。
关键词:表面改性;塑料填料;流体力学;传质性能
中图分类号:TQ021.1文献标识码:A文章编号:1005-9954(2014)12-0025-05
DOI:10.3969/j.issn.1005-9954.2014.12.006
Hydrodynamic and mass transfer performance of
modified plastic structured packing
LIU Jiate, HU Jian-guang, DAI Gan-ce
State Key Laboratory of Chemical Engineering, East China University of Science and Technology
Shanghai 200237, China)
Abstract: A new method was used to modify the film forming of plastic structure packing and the comprehensive
performance with commercial packing was compared in the same conditions. In order to evaluate the hydrodynamics
and mass transfer performance of the commercial and modified structured packing with textured surface, the
experiment of oxygen desorption from water was carried out in a packed column of 190 mm under the condition of
liquid spray density 10-36 m/(m.h )and F factor 0.2-3(m/s).(kg/m ).2. The result shows that with liquid
spray density of 10, 24, 36 m /(mh), the height of liquid transfer unit H of surface modified structured
packing is decreased by 29. 50%, 23.00% and 23.95% respectively in comparison with those of a commercial
packing, while the pressure drop is lower by 85. 37%, 89. 71% and 88. 35%o than commercial packing
respectively, which demonstrates a significant improvement in mass transfer performance for the surface modified
packing. In addition, the correlations of H. and pressure drop were obtained, flooding phenomenon was discussed
by narrow channel theory and the foundation of industrial design was built
Key words: surface modification; plastic structured packing; hydrodynamics; mass transfer performance
填料作为填料塔的核心部件,在塔内气液分离流”,有研究认为,对于液体在填料表面的有效润湿
中起到至关重要的作用。对于塑料填料,尤其是聚面积,塑料填料仅为陶瓷填料的40%。对于塑料
丙烯(PP)填料因为其具有质量轻、价格低和耐腐蚀润湿改性有学者研究,提出了表面氧化润湿改
等特性,在工业中应用比较广泛,但是塑料普遍润湿性2、等离子润湿改性)、表面润湿接枝?等方
性能较差,液体在填料表面容易形成“溪流”或“沟法,但都因污染大、成本高、易退化等原因难以实现
收稿日期:201401-23
作者简介:刘佳特(1988-),男,硕上研究生,研究方向为新型规整填料开发,电话:13816702017,E-mail:liujiate(@2hotmail.com