三相气升式内环流反应器的流体力学性能

齐亚兵

doi:10.13205/j.hjgc.202010021

三相气升式内环流反应器的流体力学性能

doi: 10.13205/j.hjgc.202010021

齐亚兵

西安建筑科技大学化学与化工学院, 西安 710055

基金项目:

西安建筑科技大学青年科技基金（QN1509）；西安建筑科技大学人才科技基金（RC1714）。

详细信息

作者简介:
齐亚兵(1983-),男,博士,讲师,研究方向为传质与分离技术、水处理技术。qiyabing123@163.com

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出版历程
- 收稿日期: 2019-08-18

HYDRODYNAMICS PROPERTIES OF A THREE-PHASE AIR-LIFT INTERNAL-LOOP REACTOR

QI Ya-bing

School of Chemistry and Chemical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China

摘要

摘要: 从气含率、循环液速、停留时间分布等方面研究三相气升式内环流反应器的性能。结果表明：气含率随着表观气速、固含率的增大而增大；在低气速下，固含率对气含率的影响较大；在高气速下，固含率对气含率的影响比较小。在大量实验数据的基础上通过拟合得到预测气含率的经验关联式，且预测值与实验值吻合较好。基于推动力与阻力平衡建立了预测反应器循环液速的数学模型；用脉冲示踪法得到反应器的停留时间分布函数曲线，并通过计算得到了平均停留时间、停留时间分布方差、无因次方差等，得知此反应器接近全混流型反应器。
- 三相气升式内环流反应器 /
- 气含率 /
- 循环液速 /
- 停留时间分布
Abstract: The hydrodynamics in a three-phase air-lift internal-loop reactor were studied in terms of gas holdup, liquid circulation velocity and residence time distribution. The results showed that gas holdup was increased with superficial gas velocity and solid holdup. The solid holdup played an important role in gas holdup at lower superficial gas velocity, whereas the solid holdup had a little effect on gas holdup at higher superficial gas velocity. On the basis of lots of experimental data, the experienced correlation for predicting gas holdup was obtained. The predictable values of gas holdup were well fitted with its experimental values. A mathematical model for predicting liquid circulation velocity was proposed in terms of the balance between driving and resistance forces. The curve of residence time distribution function was gained by using pulse chasing method, and it was known that the reactor had approached completely mixing reactor in terms of computing mean of residence time, dimension and dimensionless variance of residence time distribution and so on.
- three-phase air-lift internal-loop reactor /
- gas holdup /
- liquid circulation velocity /
- residence time distribution

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参考文献(22)

王帅,付鑫,龙文宇,等. 旋流气升式环流反应器中甘油水溶液物系上上升区气含率[J].化工科技, 2019, 27(4):31-35.

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, 4(40):118-124.

施云芬,任惠敏,于大禹. 气升式环流反应器处理废水的研究进展[J].东北电力大学学报, 2018, 38(4):76-84.

刘鹏麟,刘永民,陈琴. 有分离器的环流反应器的气含率研究[J]. 当代化工, 2018, 47(1):26-28.

高闯,王继锋. 高长径比气升式环流反应器的流体动力学模型[J].沈阳化工大学学报, 2016, 30(3):217-222.

戚航铭,赵德智,宋官龙. 环流反应器研究进展[J].当代化工, 2015, 44(9):2171-2174.

ZHANG W P, YONG Y M, ZHANG G J, et al. Mixing characteristics and bubble behavior in airlift internal loop reactor with low aspect ratio[J]. Chinese Journal of Chemical Engineering, 2014, 22(6):611-621.

黄青山,张伟鹏,杨超,等. 环流反应器的流动、混合与传递特性[J].化工学报, 2014, 65(7):2465-2473.

李树超,吕芳. 气升式环流反应器在高酚农药废水处理中应用研究[J].石化技术, 2013, 20(2):5-8.

王宇,刘永民,龙帅. 高长径比三相内环流反应器中相含率的分布研究[J].化工科技, 2013, 21(1):20-23.

韩玉环,杨索和,靳海波,等. 气液固三相外环流反应器相含率分布与气液流动结构[J].过程工程学报, 2010, 10(5):862-867.

王燕. 气液固三相气升式环流反应器流动特性研究[D]. 南京:南京工业大学,2007.

JIN H B, WANG M, WILLIAM R A. The effect of sparger geometry on gas bubble flow behaviors using electrical resistance tomography[J].Chinese Journal of Chemical Engineering, 2006, 14(1):127-131.

于伟,王铁峰,汪展文. 两级气液内环流反应器内气含率和循环液速[J].化工学报, 2008, 59(5):1107-1113.

周平,何嘉汉,钱易. 内循环三相生物流化床反应器的相含率及氧传递特性研究[J].环境科学学报, 1996, 16(2):211-215.

ABASHAR M E, NARSING H U, ROUILLARD A E, et al. Hydrodynamic flow regimes, gas holdup and liquid circulation in air lift reactors[J].Industrial & Engineering Chemistry Research, 1998, 37(4):1251-1259.

管秀琼,李俊,周健,等. 高效内循环生物反应器的流体力学与传质特性[J].陕西科技大学学报, 2003, 21(2):23-26.

疏明君,李友明,谢澄. 固含率·三相流化床流体动力学性质的影响因素[J].湘潭大学自然科学学报, 2002, 24(2):58-61.

谢波,韦朝海,吴超飞,等. 缩放型导流筒气升式内环流生物反应器流体力学与传质特性[J].高校化学工程学报, 1999, 13(2):121-128.

朱炳辰.化学反应工程[M]. 4版. 北京:化学工业出版社,2007.

梁斌,段天平,傅红梅,等. 化学反应工程[M]. 北京:科学出版社,2003.

FREITAS C, FIALOVA M, ZAHRADNIK J, et al.Hydrodynamics of a three-phase external-loop airlift bioreactor[J].Chemical Engineering Science, 2000, 55(21):4961-4972.

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