规整填料内置隔板边长对压降及传质的影响

摘要

传质发生在规整填料表面，通道内气体间相互碰撞形成的涡流在一定程度上强化传质，但消耗大量能量，压降升高。为减小压降，在每个传质单元中非波谷区加入隔板得到新型规整填料Mon-JKB-250Y。CFD（Computational Fluid Dynamics计算机流体力学）模拟发现，增大隔板边长，压降减小、气相总传质效率增大、单位压降下的传质系数先增大后减小，存在一个最适宜隔板边长。在F=1.2~2.7 m·s^-1·（kg·m^-3）^0.5范围内，隔板边长为14.7~16.8 mm时，单位压降下的传质系数达到最大。运用显色化学反应可视化技术验证CFD模拟结果，平均相对误差小于10%，CFD模拟结果可靠。

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	喻茹
	朱慧铭

关键词：规整填料； CFD数值模拟；化学反应；流体可视化技术；压降；传质

Abstract：

Mass transfer occurs on the wall, two stands of gas collide in channels and form vortexes which strengthen mass transfer, consume lots of energy and increase pressure drop. To decrease pressure drop, a novel structured packing with a baffle in the middle of each mass transfer unit named Mon-JKB-250Y was developed. CFD (Computational Fluid Dynamics) results show that as the length increases, pressure drop decreases, gas-side total mass transfer efficiency improves and mass transfer coefficient at per pressure drop increases at first and then decreases. There is a best length of baffle.When F=1.2-2.7 m·s^-1· (kg·m^-3)^0.5, mass transfer coefficient at per pressure drop reaches its maximum when the length is 14.7-16.8 mm. Chromochemical reactive flow visualization technique was employed to verify CFD results. Average relative error is less than 10%, which confirms that CFD simulation results are reliable.

Keywords： structured packing； computational fluid dynamics； chemical reaction； flow visualization； pressure drop； mass transfer

Received 2016-04-10;

Corresponding Authors: 朱慧铭,E-mail:hzhu@tju.edu.cn Email: hzhu@tju.edu.cn

About author: 喻茹(1989-),女,硕士研究生,现从事化工传质传热与分离方面的研究。

引用本文:

喻茹, 朱慧铭.规整填料内置隔板边长对压降及传质的影响[J]. 化学工业与工程, 2018,35(4): 58-65

Yu Ru, Zhu Huiming.Impact of Length of Baffle in Structured Packing on Pressure Drop and Mass Transfer[J]. Chemcial Industry and Engineering, 2018,35(4): 58-65

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