导流筒结构对气升式反应器传质性能的影响研究

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摘要气升式环流反应器广泛应用于化工、环境等领域,深入研究反应器内气-液两相流体流动行为对提高其传质性能具有重要意义。通过分别建立气-液两相流模型和气泡粒群衡算模型并实现二者的耦合求解,研究了单个方形导流筒、单个圆形导流筒和6个圆形导流筒结构对气-液两相流体流动特性、气泡尺寸分布和气-液相间传质的影响。研究表明,含6个圆形导流筒结构的气升式环流反应器气含率和液相速度分布趋于均匀,平均气含率更大,气泡尺寸更小,传质速率更大,反应器的综合性能得到显著提升。相关模拟结果为气升式环流反应器结构优化和放大指明了方向。

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	李亮
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	张成凯

关键词：气升式环流反应器计算流体力学传质数值模拟

Abstract： The airlift loop reactor is widely used in chemical industry, environment and other fields. It is important to study the gas-liquid two-phase flow behavior in the airlift loop reactor to improve its mass transfer performance. In this study, the gas-liquid two-phase flow model and bubble population balance model were developed to investigate the effects of a single square draft tube, a single circular draft tube and six circular draft tubes on the gas-liquid two-phase flow characteristics, bubble size distribution and gas-liquid mass transfer. The results show that the airlift loop reactor with six circular draft tubes has larger average gas holdup and smaller bubble size, thus providing improved mass transfer rate. The relevant simulation results are useful for the structural optimization and scale-up of the airlift loop reactor.

Keywords： airlift loop reactor computational fluid dynamics mass transfer numerical simulation

Received 2022-11-04;

Fund:重大科技项目(NOOC-KJ 145 FZDXM 00 TJY 003 TJY 2021)。

Corresponding Authors: 李亮,高级工程师,E-mail:liliang80cn@163.com。 Email: liliang80cn@163.com

About author: 李亮(1980-),男,高级工程师,现从事工业废水处理方面的研究。

引用本文:

李亮, 郝润秋, 郝亚超, 师晓光, 张成凯.导流筒结构对气升式反应器传质性能的影响研究[J]. 化学工业与工程, 2024,41(1): 144-150

LI Liang, HAO Runqiu, HAO Yachao, SHI Xiaoguang, ZHANG Chengkai.Study on the effect of draft tube structure on mass transfer performance of airlift loop reactor[J]. Chemcial Industry and Engineering, 2024,41(1): 144-150

[1] JAFARIAN M, CHISTI Y, NATHAN G J. Gas-lift circulation of a liquid between two inter-connected bubble columns[J]. Chemical Engineering Science, 2020, 218: 115574
[2] SIEGEL M H, ROBINSON C W. Application of airlift gas-liquid-solid reactors in biotechnology[J]. Chemical Engineering Science, 1992, 47(13/14): 3215-3229
[3] LIU Z, SHI S, LI Y. Coal liquefaction technologies—Development in China and challenges in chemical reaction engineering[J]. Chemical Engineering Science, 2010, 65(1): 12-17
[4] FENG W, WEN J, JIA X, et al. Modeling for local dynamic behaviors of phenol biodegradation in bubble columns[J]. AIChE Journal, 2006, 52(8): 2864-2875
[5] ŠIJAČKI I M, TOKIĆ M S, KOJIĆ P S, et al. Sparger type influence on the hydrodynamics of the draft tube airlift reactor with diluted alcohol solutions[J]. Industrial & Engineering Chemistry Research, 2011, 50(6): 3580-3591
[6] DENG Z, WANG T, ZHANG N, et al. Gas holdup, bubble behavior and mass transfer in a 5m high internal-loop airlift reactor with non-Newtonian fluid[J]. Chemical Engineering Journal, 2010, 160(2): 729-737
[7] 刘永民, 袁乃驹. 在多室环流反应器中用FCC干气制备乙醛[J]. 石油学报(石油加工), 2005, 21(2): 92-94 LIU Yongmin, YUAN Naiju. Production of acetaldehyde from fcc off-gasin a multi-component airlift loop reactor[J]. Acta Petrolei Sinica (Petroleum Processing Section), 2005, 21(2): 92-94(in Chinese)
[8] 孙守华, 刘永民, 路蒙蒙. GLS-MALR中的气含率和循环液速[J]. 石油学报(石油加工), 2011, 27(3):405-410 SUN Shouhua, LIU Yongmin, LU Mengmeng. Gas holdup and liquid circulation velocity in GLS-MALR[J]. Acta Petrolei Sinica (Petroleum Processing Section), 2011, 27(3): 405-410(in Chinese)
[9] 李红星. 三相连续环流反应器流动特性研究[D]. 北京: 北京化工大学, 2007 LI Hongxing. Study on flow characteristics of three-phase continuous loop reactor[D]. Beijing: Beijing University of Chemical Technology, 2007(in Chinese)
[10] 刘梦溪, 卢春喜, 储凌, 等. 中心气升式三相强化环流反应器内局部气含率分布的实验研究[J]. 高校化学工程学报, 2005, 19(1):36-41 LIU Mengxi, LU Chunxi, CHU Ling, et al. Experimental study on local gas holdup in a novel three-phase air loop reactor[J]. Journal of Chemical Engineering of Chinese Universities, 2005, 19(1): 36-41(in Chinese)
[11] FARHADIAN N, BEHIN J, PARVAREH A. Residence time distribution in an internal loop airlift reactor: CFD simulation versus digital image processing measurement[J]. Computers & Fluids, 2018, 167: 221-228
[12] TELI S M, MATHPATI C S. Experimental and numerical study of gas-liquid flow in a sectionalized external-loop airlift reactor[J]. Chinese Journal of Chemical Engineering, 2021, 32: 39-60
[13] 张庆文,洪厚胜,欧阳平凯. CFD用于气升式内环流反应器流体力学性质的研究[C]//第一届全国化学工程与生物化工年会论文摘要集(下), 2004
[14] 沈荣春. 气升式环流反应器内气液两相流动CFD数值模拟的研究[D]. 上海: 华东理工大学, 2005
[15] 李干禄, 韦策, 吴昊, 等. 气升式反应器气液混合及传质特性的CFD模拟[J]. 南京工业大学学报(自然科学版), 2018, 40(4):118-124 LI Ganlu, WEI Ce, WU Hao, et al. Simulation of gas-liquid mixing and mass transfer characteristics in the airlift reactor[J]. Journal of Nanjing University of Technology (Natural Science Edition), 2018, 40(4): 118-124(in Chinese)
[16] HUANG Q, YANG C, YU G, et al. 3-D simulations of an internal airlift loop reactor using a steady two-fluid model[J]. Chemical Engineering & Technology, 2007, 30(7): 870-879
[17] HUANG Q, ZHANG W, YANG C. Modeling transport phenomena and reactions in a pilot slurry airlift loop reactor for direct coal liquefaction[J]. Chemical Engineering Science, 2015, 135: 441-451
[18] JAKOBSEN H A, GREVSKOTT S, SVENDSEN H F, et al. Modeling of vertical bubble-driven flows[J]. Industrial & Engineering Chemistry Research, 1997, 36(10): 4052-4074
[19] LUO H, SVENDSEN H F. Theoretical model for drop and bubble breakup in turbulent dispersions[J]. AIChE Journal, 1996, 42(5): 1225-1233
[20] LEHR F, MILLIES M, MEWES D. Bubble-size distributions and flow fields in bubble columns[J]. AIChE Journal, 2002, 48(11): 2426-2443
[21] CHEN P, DUDUKOVI M P, SANYAL J. Three-dimensional simulation of bubble column flows with bubble coalescence and breakup[J]. AIChE Journal, 2005, 51(3): 696-712