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侧入式搅拌槽中多相流流场特性的数值模拟

Keywords: 侧入式搅拌槽,数值模拟,多相流场,固液悬浮

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Abstract:

运用计算流体力学(CFD)技术对不同安装偏角的侧入式搅拌反应器中单相及多相流场进行了数值模拟。模拟结果表明,典型安装偏角下,搅拌槽内流场是由内部围绕搅拌槽中心的高速环形上升流和外部沿搅拌槽壁面的低速下降流组成的大循环流。水平偏角既增加了整个搅拌槽流场的平均速度,有利于固体颗粒在整个搅拌槽内的悬浮性能,又增大了槽底高速流体区域的面积,因而改善了槽底固相沉积状况。竖直偏角增大了槽底高速流体区域的面积,并对槽底施加一定的冲刷作用,从而进一步降低了槽底固相沉积的可能性。无安装偏角时槽底固含率最多的地方主要积聚在搅拌器下方区域。搅拌器在水平偏角θ=10°,竖直偏角φ=5°时槽底大部分区域的固含率分布较均匀,仅在槽底搅拌器右侧的壁面区域存在小面积的固含率较高区域,在该安装偏角下整个搅拌槽的固液悬浮性能及防止底部固相沉积性能达到最佳。

References

[1]  Janz E. E., Fasano J., Myers K. J. Different solids suspension techniques in flue gas desulfurization. Cincinnati, OH, United States: American Institute of Chemical Engineers, 2005.4067-4068
[2]  崔娜,周国忠,李伟,等. 烟气脱硫吸收塔底部浆液池内流场特性的数值模拟. 化学反应工程与工艺, 2009,25(2):126-131 Cui Na, Zhou Guozhong, Li Wei, et al. Numerical simulation of flow field in the slurry pond of a flue-gas desulfurization tower. Chemical Reaction Engineering and Technology, 2009,25(2):126-131(in Chinese)
[3]  周国忠,王英琛,施力田. 用CFD研究搅拌槽内的混合过程. 化工学报, 2003,54(7):886-890 Zhou Guozhong, Wang Yingchen, Shi Litian. CFD study of mixing process in stirred tank. Journal of Chemical Industry and Engineering, 2003,54(7):886-890(in Chinese)
[4]  郭武辉,潘家祯. 计算流体力学用于搅拌器流场研究及结构设计. 化学工程, 2009,37(9):20-23 Guo Wuhui, Pan Jiazhen. Application of computational fluid dynamics to flow research and structure design of stirred tank. Chemical Engineering, 2009,37(9):20-23(in Chinese)
[5]  Saeed S., Ein Mozaffari F., Upreti S. R. Using computational fluid dynamics modeling and ultrasonic doppler velocimetry to study-pulp suspension mixing. Industrial and Engineering Chemistry Research, 2007,46(7):2172-2179
[6]  方键,桑芝富,杨全保. 侧进式搅拌器三维流场的数值模拟. 石油机械, 2009,37(1):30-34 Fang Jian, Sang Zhifu, Yang Baoquan. Numerical simulation of 3-D flow field in side-entering agitator. China Petroleum Machinery, 2009,37(1):30-34(in Chinese)
[7]  都荣礼,黄雄斌,王昕,等. 侧伸式气液搅拌槽内的搅拌功率与传质性能. 过程工程学报, 2008,8(4):709-713 Dou Rongli, Hang Xiongbin, Wang Xin, et al. Measurement of stirring power and mass transfer by a side-entering gas-liquid agitator. The Chinese Journal of Process Engineering, 2008,8(4):709-713(in Chinese)
[8]  郑晓东,黄雄斌,都荣礼. 侧伸式搅拌槽固液悬浮性能. 过程工程学报, 2009,9(3):417-423 Zheng Xiaodong, Hang Xiongbin, Dou Rongli. Suspension of solid particles by side-entering agitators. The Chinese Journal of Process Engineering,2009,9(3):417-423(in Chinese)
[9]  刘冠一. 侧入式搅拌中固液悬浮的数值模拟. 济南:山东大学硕士学位论文, 2010 Liu Guanyi. Simulation of solid-liquid suspension in stirred vessels with side-entering agitators. Jinan: Master’s Degree Thesis of Shandong University, 2010(in Chinese)
[10]  张林进,陈功国,叶旭初. 侧进式搅拌反应器内流场的数值模拟. 化学反应工程与工艺, 2011,27(2):97-102 Zhang Linjin, Chen Gongguo, Ye Xuchu. Numerical simulation of flow field in side-entering stirred reactor. Chemical Reaction Engineering and Technology, 2011,27(2):97-102(in Chinese)
[11]  Brucato A., Ciofalo M., Grisafi F., et al. Numerical prediction of flow fields in baffled stirred vessels: A comparison of alternative modelling approaches. Chemical Engineering Science, 1998,53(21):3653-3684
[12]  Ranade V. V., Bourne J. R., Joshi J. B. Fluid mechanics and blending in agitated tanks. Chemical Engineering Science, 1991,46(8):1883-1893

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