底隙高度对生物流化床内流场和氧传质特性的影响

董亮; 张毅; 沈桓宇; 李鉴松; 曾涛; 徐银香; 崔亚辉; 赵桐

doi:10.13205/j.hjgc.202306015

底隙高度对生物流化床内流场和氧传质特性的影响

doi: 10.13205/j.hjgc.202306015

董亮^1,2,
张毅²,
沈桓宇²,
李鉴松²,
曾涛^3, ,,
徐银香³,
崔亚辉¹,
赵桐¹

1. 西安理工大学机械与精密仪器工程学院, 西安 710048;
2. 南充职业技术学院机电工程系, 四川南充 637131;
3. 四川轻化工大学机械工程学院, 四川宜宾 644002

基金项目:

南充市科技局项目（19YFZJ0008）；国家自然科学青年基金项目（51808362）；四川省科技创新苗子工程项目（2929131）；成都水生态文明建设研究重点基地项目（2018SST-07）

详细信息

作者简介:
董亮(1987-),男,博士研究生,主要研究方向为机械设计及理论。

通讯作者:
曾涛(1967-),女,博士,教授,主要研究方向为多相流技术及应用。96109721@qq.com

计量
- 文章访问数: 97
- HTML全文浏览量: 12
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2022-06-12
- 网络出版日期: 2023-09-02

EFFECT OF GAP HEIGHT OF BASE SLOT ON LIQUID FLOW FIELD AND OXYGEN MASS TRANSFER IN A BIOLOGICAL FLUIDIZED BED

1. School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China;
2. Department of Mechanical and Electrical Engineering, Nanchong Vocational Technology College, Nanchong 637131, China;
3. School of Mechanical Engineering, Sichuan University of Science & Engineering, Yibin 644002, China

摘要

摘要: 针对生物流化床内构件中底隙高度的设计、优化问题，应用激光粒子图像测速（PIV）和溶解氧在线测试技术，分析了不同曝气强度和底隙高度对生物流化床液相速度、湍动能和氧传质特性的影响。结果表明：底隙高度为75 mm时生物流化床的底部液速和整体液速最大，整体液相湍动能较小。同时，在氧转移系数和转移效率上，有较小的劣势。从结构优化的角度出发，当折流板底隙高度为75 mm时整体效果最好，有利于节约能耗和降低成本。以期为更全面、深入地分析生物流化床其他内构件的协同作用及寻找最佳液相流场和氧传质特性提供参考。
- 生物流化床 /
- PIV /
- 湍动能 /
- 氧转移系数 /
- 氧转移效率
Abstract: Aiming at the design and optimization problem of gap height of base slot in the internal components of the biofluidized bed, the effects of different aeration intensities and different gap heights on liquid phase velocity, turbulent kinetic energy and oxygen mass transfer characteristics of biofluidized beds were analyzed by applying laser particle image velocity (PIV) and dissolved oxygen online testing techniques. The result showed that the bottom liquid velocity and the overall liquid velocity of the fluidized bed were maximum when the gap height was 75 mm, and the overall liquid phase turbulent kinetic energy was relatively smaller. Morever, there were small disadvantages in oxygen mass transfer coefficient and mass transfer efficiency. From the perspective of structural optimization, the overall effect was the best when the baffle had a low clearance height of 75 mm, which was conducive to saving energy consumption and reducing cost. In addition, the optimal liquid phase flow field and oxygen mass transfer characteristics, and a more comprehensive and in-depth analysis of the synergy of other internal components of the biological fluidized bed were still required.
- biofluidized bed /
- PIV /
- turbulence kinetic /
- oxygen transfer coefficient /
- oxygen transfer efficiency

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参考文献(32)

[1]	DAIZO K, LEVENSPIEL O D. Fluidization Engineering[M]. 2nd ed. Oxford:Butterworth-Heinemann, 1991.
[2]	陈少奇,邵媛媛,马可颖,等.液固循环流化床的开发与应用:过程集成与强化[J].化工进展,2019,38(1):122-135.
[3]	MICHAEL J, NELSON, GEORGE HAKHLA, et al. Fluidized-bed bioreactor applications for biological wastewater treatment:a review of research and developments[J]. Engineering 2017, 3(3):330-342.
[4]	韩香云,单学凯,陈天明. 微囊化生物流化床降解对氯甲苯的性能优化[J].环境工程,2016,34(11):12-17 , 63.
[5]	DRAKE J B, HEINDEL T J. Comparisons of annular hydrodynamic structures in 3D fluidized beds using X-ray computed tomography imaging[J]. Journal of Fluids Engineering, 2012, 134(8):081305.
[6]	陈梓晟,张涛,麦礼杰,等.正方形流化床结构参数改变和内构件强化的数值模拟解析[J].化工进展,2017,36(6):1997-2009.
[7]	朱家亮,张涛,韦朝海.基于结构参数响应的内循环流化床流体特性优化数值模拟[J].环境科学学报,2012,32(11):2732-2740.
[8]	LIU R, LIU Y, LIU C Z. Development of an efficient CFD-simulation method to optimize the structure parameters of an airlift sonobioreactor[J]. Chemical Engineering Research & Design, 2013, 91(2):211-220.
[9]	XU L, LIU R, WANG F, et al. Development of a draft-tube airlift bioreactor for Botryococcus braunii with an optimized inner structure using computational fluid dynamics[J]. Bioresource Technology, 2012, 119(7):300-305.
[10]	FAN L, XU N, ZHANG Y K, et al. Structure optimization of an improved inner-circulating biological fluidized bed by numerical simulation[J]. Environmental Engineering Science, 2008, 25(6):839-848.
[11]	陈婷,余健,王烽,等.基于CFD的三相内循环生物流化床操作参数影响的分析[J].环境工程,2015,33(7):19-23 , 40.
[12]	YAN C Y, LU C X, LAN X Y, et al. Hydrodynamics in airlift loop section of petroleum coke combustor[J]. Powder Technology, 2009, 192:143-151.
[13]	BOYER C, DUQUENNE A, WILD G. Measuring techniques in gas-liquid and gas-liquid-solid reactors[J]. Chemical Engineering Science, 2002, 57:3185-3215.
[14]	DI RENZO A, DI MIAO F P. Homogeneous and bubbling fluidization regimes in DEM-CFD simulations:hydrodynamic stability of gas and liquid fluidized beds[J]. Chemical Engineering Science, 2007, 62(1):116-130.
[15]	CHRISTOPHER E. BRENNEN. Fundamentals of multiphase flows[M]. Cambridge:Cambridge University Press, 2005.
[16]	MARKUS R, CHRISTIAN E. Particle Image Velocimetry:a Pratical Guide[M]. Berlin:Springer, 2007.
[17]	ALBERINI F, LIU L, STITT E H, et al. Comparison between 3-D-PTV and 2-D-PIV for determination of hydrodynamics of complex fluids in a stirred vessel[J]. Chemical Engineering Science, 2017, 171:189-203.
[18]	ZHOU Y J, LIN W Z, YUAN M Y, et al. Investigation on the flow field and mixing efficiency of a stirred tank equipped with improved intermig impellers[J]. International Journal of Chemical Reactor Engineering, 2019, 17(11):2019-0020.
[19]	张波涛,李永,李小明,等.应用PIV技术测量封闭式水泵吸水池内部流场[J].水泵技术,2001(6):7-10.
[20]	周小红,施汉昌,何苗.采用微电极测定溶解氧有效扩散系数的研究[J].环境科学,2007,28(3):598-602.
[21]	NAPHON P, WONGWISES S. A review of flow and heat transfer characteristics in curved tubes[J]. Renewable and Sustainable Energy Reviews, 2006, 10(5):463-490.
[22]	YU L M, ZENG A W, YU K T. Effect of interfacial velocity fluctuations on the enhancement of the mass-transfer process in falling-film flow[J]. Industrial & Engineering Chemistry Research, 2006, 45(3):1201-1210.
[23]	刘代俊,钟本和,张允湘.颗粒与液相间的湍流涡旋裂变传质模型[J].化工学报,2004,55(1):25-31.
[24]	王银亮,艾海南,黄维,等.排水管道内湍动能分布特性及影响因素[J].环境工程学报,2015,9(8):3637-3642.
[25]	董亮,曾涛,刘少北,等.四边形折流式膜生物流化床内填料浓度及液相流场特性研究[J].环境科学学报,2017,37(11):4139-4149.
[26]	PRASAD A K. Stereoscopic particle image velocimetry[R]. Experiments in Fluids, 2000, 29:103-116.
[27]	岳廷瑞,张逊,刘垒,等.PIV系统测量误差的评价方法研究[J].计算机测量与控制,2018,26(12):255-259.
[28]	JONG H Y, SANG-JOON L. Direct comparison of 2D PIV and stereoscopic PIV measurements[R]. Meas Sci Technol, 2002, 13:1631-1642.
[29]	董亮,曾涛,刘少北,等.不同进水流量对管式曝气池液相流态及氧传质特性的影响[J].环境污染与防治,2017,39(11):1246-1250.
[30]	LUO L J, YUAN J Q, XIE P, et al. Hydrodynamics and mass transfer characteristics in an internal loop airlift reactor with sieve plates[J]. Chemical Engineering Research and Design, 2013, 91(12):2377-2388.
[31]	LITTLEJOHNS J V, ANDREW J D. Oxygen mass transfer and hydrodynamics in a multi-phase airlift bioscrubber system[J]. Chemical Engineering Science, 2009, 64(19):4171-4177.
[32]	贾荣畅,刘颖,朱燕,等.微孔曝气器孔径与运行气量对微孔曝气氧传质的影响研究[J].环境污染与防治,2015,37(8):75-79.