Effects of different draft baffles on the hydrodynamics in internal-loop airlift reactors

详细信息    查看全文

• 作者：Siyuan Qie 郄思远 ; Fei Gao 驿顿/a> ; Chen Liu 冿旿/a>…
• 关键词：internal ; loop airlift reactor ; hydrodynamics ; draft baffle structure ; particle image velocimetry
• 刊名：Transactions of Tianjin University
• 出版年：2015
• 出版时间：October 2015
• 年：2015
• 卷：21
• 期：5
• 页码：446-452
• 全文大小：756 KB
• 参考文献：[1]Bennett G F, Peters R W. The removal of oil from wastewater by air flotation: A review [J]. Crit Rez Env Sci Technol, 1988, 18(3): 189–253.
  [2]Siegel M H, Robinson C W. Application of airlift gasliquid-solid reactors in biotechnology [J]. Chem Eng Sci, 1992, 47(13/14): 3215–3229.CrossRef
  [3]Yu W, Wang T F, Liu M L et al. Liquid backmixing and particle distribution in a novel multistage internal-loop airlift slurry reactor[J]. Ind Eng Chem Res, 2008, 47(11): 3974–3982.CrossRef
  [4]Wang T F, Wang J F, Jin Y. Slurry reactors for gas-to-liquid processes: A review [J]. Ind Eng Chem Res, 2007, 46(18): 5824–5847.MathSciNet CrossRef
  [5]Chisti M Y, Halard B, Moo-Young M. Liquid circulation in airlift reactors [J]. Chem Eng Sci, 1988, 43(3): 451–457.CrossRef
  [6]Merchuk J C, Siegel M H. Air-lift reactors in chemical and biological technology [J]. Chem Technol Biotechnol, 1988, 41(2): 105–120.CrossRef
  [7]Albijanic B, Havran V, Petrovic D L et al. Hydrodynamics and mass transfer in a draft tube airlift reactor with dilute alcohol solutions [J]. AIChE J, 2007, 53(11): 2897–2904.CrossRef
  [8]Blažej M, Kiša M, Markoš J. Scale influence on the hydrodynamics of an internal loop airlift reactor [J]. Chem Eng Process, 2004, 43(12): 1519–1527.CrossRef
  [9]Deng Z H, Wang T F, Zhang N et al. Gas holdup, bubble behavior and mass transfer in a 5 m high internal-loop airlift reactor with non-Newtonian fluid [J]. Chem Eng J, 2010, 160(2): 729–737.MathSciNet CrossRef
  [10]Mohanty K, Das D, Biswas M N. Hydrodynamics of a novel multi-stage external loop airlift reactor [J]. Chem Eng Sci, 2006, 61(14): 4617–4624.CrossRef
  [11]Klein J, Godo Š, Dolgoš O et al. Effect of a gas-liquid separator on the hydrodynamics and circulation flow regimes in internal-loop airlift reactors [J]. J Chem Technol Biotechnol, 2001, 76(5): 516–524.CrossRef
  [12]Šijacki I M, Tokic MS, Kojic P S et al. Sparger type influence on the hydrodynamics of the draft tube airlift reactor with diluted alcohol solutions [J]. Ind Eng Chem Res, 2011, 50(6): 3580–3591.CrossRef
  [13]Hwang S J, Cheng Y L. Gas holdup and liquid velocity in three-phase internal-loop airlift reactors [J]. Chem Eng Sci, 1997, 52(21/22): 3949–3960.CrossRef
  [14]Lin T J, Chen P C. Studies on hydrodynamics of an internal-loop airlift reactor in gas entrainment regime by particle image analyzer [J]. Chem Eng J, 2005, 108(1): 69–79.CrossRef
  [15]Chen R C, Reese J, Fan L S. Flow structure in a threedimensional bubble column and three-phase fluidized bed [J]. AIChE J, 1994, 40(7): 1093–1104.CrossRef
  [16]Dong M Z, Wang Y, Jiang N T. An experimental method for evaluating the PIV measurement error and its application in optimizing PIV experiment parameters [J]. Journal of Experiments in Fluid Mechanics, 2005, 19(2): 79–83(in Chinese).MathSciNet
  [17]Fadavi A, Chisti Y. Gas holdup and mixing characteristics of a novel forced circulation loop reactor [J]. Chem Eng J, 2007, 131(1-3): 105–111.CrossRef
  [18]Heijnen J J, Hols J, Van Der Lans R et al. A simple hydrodynamic model for the liquid circulation velocity in a fullscale two-and three-phase internal airlift reactor operating in the gas recirculation regime [J]. Chem Eng Sci, 1997, 52(15): 2527–2540.CrossRef
  [19]Bakker W A M, Van Can H J L, Tramper J et al. Hydrodynamics and mixing in a multiple air-lift loop reactor [J]. Biotechnol Bioeng, 1993, 42(8): 994–1001.CrossRef
  
• 作者单位：Siyuan Qie 郄思远 (1)
  Fei Gao 高 飞 (1)
  Chen Liu 刘 晨 (1)
  Zheqing Huang 黄哲庆 (1)
  Chunjiang Liu 刘春江 (1)
  
  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
  
• 刊物类别：Engineering
• 刊物主题：Chinese Library of Science
  
• 出版者：Tianjin University
• ISSN：1995-8196

文摘

In this paper, a 2-D airlift reactor was developed. The streamline and hydrodynamic parameters were measured in a 2-D airlift loop reactor(ALR)with different draft baffles. Three regimes were observed under different conditions. Particle image velocimetry(PIV)measurement showed that the liquid velocity distribution in horizontal direction presented different profiles in the three regimes. The length, the height and the spacing of draft baffles were applied in the experiments to optimize the ALR structure. It was found that the draft tube structure is of great importance in determining the hydrodynamics of ALRs. Additionally, the experimental results may serve as a step to the further optimization and design of ALR.