Mixing characteristics of continuous flow reactor coupled with jet and mechanical stirring

化学工业与工程

Chemcial Industry and Engineering

2023, Vol. 40

Issue (2) :133-142 DOI: 10.13353/j.issn.1004.9533.20210808

Current Issue | Next Issue | Archive | Adv Search

<< | >>

Mixing characteristics of continuous flow reactor coupled with jet and mechanical stirring

HAN Taibai^1,2, JIN Guangyuan^1,2, ZOU Pengcheng^1,2, ZHU Yulian^1,2, SONG Chunfang^1,2, LI Zhenfeng^1,2, CHEN Haiying^1,2

1. Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Jiangsu Wuxi 214122, China;
2. School of Mechanical Engineering, Jiangnan University, Jiangsu Wuxi 214122, China

Abstract	Reference	Related Articles

Download: PDF (10877KB) HTML () Export: BibTeX or EndNote (RIS) Supporting Info

Guide

Abstract By using the continuous processing technique, continuous stirred tank reactor (CSTR) is able to maintain the continuity of the production process. Compared with traditional reactor, the inner flow field in CSTR is more complex, and CSTR shows a more significant effect of the feed inlet jet on the flow field. In this paper, the traditional microwave reactor with double agitator structure was reformed with the continuous technique. Through date stimulation method, based on CFD (Computational Fluid Dynamics), the features of both flowing and mixing time in CSTR under different jet schemes were obtained. The result suggested that the jet flow affects directly not only the flow field in the flow region but also the position of the circulating eddy current and in turn affects the flow globally in the reactor. In addition, the jet direction has a greater effect on the flow pattern in the reactor. When jetting counterclockwise, the velocity gradient in the reactor got larger, the shearing effect between the fluids got stronger, thus the mixing performed the best. Compared with the traditional batch-type reactor, the time taken by CSTR was saved by 33%.

	Service

	Email this article
	Add to my bookshelf
	Add to citation manager
	Email Alert
	RSS
	Articles by authors
	HAN Taibai
	JIN Guangyuan
	ZOU Pengcheng
	ZHU Yulian
	SONG Chunfang
	LI Zhenfeng
	CHEN Haiying

Keywords： continuous flow reactor jet residence time mixing characteristics numerical simulation

Received 2021-09-03;

Fund:

About author:

Cite this article:

HAN Taibai, JIN Guangyuan, ZOU Pengcheng, ZHU Yulian, SONG Chunfang, LI Zhenfeng, CHEN Haiying.Mixing characteristics of continuous flow reactor coupled with jet and mechanical stirring[J] Chemcial Industry and Engineering, 2023,V40(2): 133-142

PDF Preview

[1] 张家仁, 雪晶, 孙洪磊. 生物柴油新反应器及其应用[J]. 化工进展, 2015, 34(4): 911-920 ZHANG Jiaren, XUE Jing, SUN Honglei. Novel biodiesel reactor and its application[J]. Chemical Industry and Engineering Progress, 2015, 34(4): 911-920(in Chinese)
[2] 刘作华, 孙伟, 熊黠, 等. 脉冲射流-刚柔组合桨强化流体混沌混合及传质性能研究[J]. 化工学报, 2020, 71(10): 4632-4641 LIU Zuohua, SUN Wei, XIONG Xia, et al. Chaotic mixing performance and mass transfer enhanced by rigid-flexible impeller with pulse jet[J]. CIESC Journal, 2020, 71(10): 4632-4641(in Chinese)
[3] MAKINO T, OHMURA N, KATAOKA K. Observation of isolated mixing regions in a stirred vessel[J]. Journal of Chemical Engineering of Japan, 2001, 34(5): 574-578
[4] 刘作华, 魏红军, 熊黠, 等. 长短叶片复合型刚柔桨强化搅拌槽内流体混沌混合行为[J]. 化工学报, 2020, 71(11): 5080-5089 LIU Zuohua, WEI Hongjun, XIONG Xia, et al. Chaotic mixing performance enhanced by rigid-flexible impeller with long-short blades in stirred tank[J]. CIESC Journal, 2020, 71(11): 5080-5089(in Chinese)
[5] AMEUR H. Effect of the shaft eccentricity and rotational direction on the mixing characteristics in cylindrical tank reactors[J]. Chinese Journal of Chemical Engineering, 2016, 24(12): 1647-1654
[6] 王宝琴, 范慧, 何爱山, 等. 连续化生产生物柴油的反应器与工艺的研究进展[J]. 化工进展, 2010, 29(4): 606-610 WANG Baoqin, FAN Hui, HE Aishan, et al. Progress in reactors for continuous biodiesel production processes[J]. Chemical Industry and Engineering Progress, 2010, 29(4): 606-610(in Chinese)
[7] WONGJAIKHAM W, WONGSAWAENG D, RATNITSAI V, et al. Low-cost alternative biodiesel production apparatus based on household food blender for continuous biodiesel production for small communities[J]. Sci Rep, 2021, doi:10.21203/rs.3.rs-289076/v1
[8] ROUSSINOVA V, KRESTA S M. Comparison of continuous blend time and residence time distribution models for a stirred tank[J]. Industrial & Engineering Chemistry Research, 2008, 47(10): 3532-3539
[9] BUSCIGLIO A, MONTANTE G, PAGLIANTI A. Flow field and homogenization time assessment in continuously-fed stirred tanks[J]. Chemical Engineering Research and Design, 2015, 102: 42-56
[10] LIU M. Age distribution and the degree of mixing in continuous flow stirred tank reactors[J]. Chemical Engineering Science, 2012, 69(1): 382-393
[11] PATEL D, EIN-MOZAFFARI F, MEHRVAR M. Using tomography to visualize the continuous-flow mixing of biopolymer solutions inside a stirred tank reactor[J]. Chemical Engineering Journal, 2014, 239: 257-273
[12] RASOULI M, MOUSAVI S M, AZARGOSHASB H, et al. CFD simulation of fluid flow in a novel prototype radial mixed plug-flow reactor[J]. Journal of Industrial and Engineering Chemistry, 2018, 64: 124-133
[13] 马泽文, 刘涛, 孙旭东. 基于CFD的结晶搅拌反应釜流场分析与改进[J]. 系统仿真学报, 2018, 30(5): 1900-1907 MA Zewen, LIU Tao, SUN Xudong. CFD based analysis and improvement of the flow field of stirred tank reactor for crystallization[J]. Journal of System Simulation, 2018, 30(5): 1900-1907(in Chinese)
[14] ROACHE P. Error bars for CFD[C]//41st Aerospace Sciences Meeting and Exhibit. Reno, Nevada. Reston, Virginia: AIAA, 2003: 1-21
[15] CRAIG K J, NIEUWOUDT M N, NIEMAND L J. CFD simulation of anaerobic digester with variable sewage sludge rheology[J]. Water Research, 2013, 47(13): 4485-4497
[16] TRUCANO T, POST D. Verification and validation in computational science and engineering[J]. Computing in Science & Engineering, 2004, 6(5): 8-9
[17] FREITAS C J. The issue of numerical uncertainty[J]. Applied Mathematical Modelling, 2002, 26(2): 237-248
[18] MANNA P, DHARAVATH M, SINHA P K, et al. Optimization of a flight-worthy scramjet combustor through CFD[J]. Aerospace Science and Technology, 2013, 27(1): 138-146
[19] 李绍芬. 反应工程[M]. 3版. 北京: 化学工业出版社, 2013
[20] RAKOCZY R, PRZYBYŁ A, KORDAS M, et al. The study of influence of a rotating magnetic field on mixing efficiency[J]. Chemical Engineering and Processing: Process Intensification, 2017, 112: 1-8
[21] 梁瑛娜, 高殿荣, 拜亮. 偏心组合桨搅拌槽内层流混合过程的数值模拟[J]. 化工进展, 2014, 33(12): 3203-3209 LIANG Yingna, GAO Dianrong, BAI Liang. Numerical simulation of laminar flow and mixing process in eccentrically stirred tank with combined impeller[J]. Chemical Industry and Engineering Progress, 2014, 33(12): 3203-3209(in Chinese)