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化工学报  2015 

转盘离心粒化中丝状成粒特性

DOI: 10.11949/j.issn.0438-1157.20150008, PP. 2474-2480

Keywords: 造粒,多相流,不稳定性,液丝,液滴,粒度分布

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Abstract:

针对转盘离心粒化工艺,以水为工质开展可视化实验。采用高速摄影仪对液膜波动、液丝断裂等粒化过程进行了捕捉,并利用MATLAB自编程序对获得的图像进行了处理。分析了离心粒化过程中液丝形成过程以及液丝断裂形成液滴的过程。研究了运行工况对液丝、液滴形成机制的影响。讨论了液丝形成对液滴形成的影响并获得了Weber数、Reynolds数对粒化效果的影响程度。结果表明,表面不稳定波是形成液丝的主要因素,且液丝在Rayleigh不稳定性的作用下断裂形成液滴。升高转速或者减小流量有利于获得均匀的小液滴。Weber数对液丝、液滴形成具有显著影响;Reynolds数仅对液丝数目有显著影响。

References

[1]  Yoshida H N Y, Nakatani G, Anazi T, Sato H. The technology of slag heat recovery at NKK//SEAISI Conference of Energy Utilization in the Iron and Steel Industry[C]. 1984.
[2]  Rodd L K T, Walker C, Voermann N. Economics of slag heat recovery from ferronickel slags //Sustainability for Profit. Conference of Metallurgists (COM2010) [C]. 2010:3-17.
[3]  Xie D, Norgate T, Jahanshahi S. Dry granulation of slags–turning waste into valuable cement binder [J]. CAMP-ISIJ, 2005,18:1088-1091
[4]  Mizuochi T, Akiyama T. Cold experiments of rotary vaned-disks and wheels for slag atomization [J]. ISIJ International, 2003, 43(9): 1469-1471.
[5]  Ahmed M, Youssef M S. Influence of spinning cup and disk atomizer configurations on droplet size and velocity characteristics [J]. Chemical Engineering Science, 2014, 107: 149-157.
[6]  Liu J, Yu Q, Guo Q. Experimental investigation of liquid disintegration by rotary cups [J]. Chemical Engineering Science, 2012, 73: 44-50.
[7]  Liu J, Yu Q, Li P, et al. Cold experiments on ligament formation for blast furnace slag granulation [J]. Applied Thermal Engineering, 2012, 40: 351-357.
[8]  Min Y, Huang J, Liu C, et al. Physical simulation of molten slag granulation by rotary disk [J]. Journal of Iron and Steel Research: International, 2013, 20(9): 26-32.
[9]  Zhu X, Zhang H, Tan Y, et al. Analogue experimental study on centrifugal-air blast granulation for molten slag [J]. Applied Thermal Engineering, 2014.
[10]  Xie J W, Zhao Y Y, Dunkley J J. Effects of processing conditions on powder particle size and morphology in centrifugal atomisation of tin [J]. Powder Metallurgy, 2004, 47(2): 168-172.
[11]  Pan Y, Witt P, Kuan B, Xie D. CFD modelling of the effects of operating parameters on the spreading of liquids on a spinning disc [J]. The Journal of Computational Multiphase Flows, 2014, 6: 49-64.
[12]  Pan Y, Witt P J, Xie D. CFD simulation of free surface flow and heat transfer of liquid slag on a spinning disc for a novel dry slag granulation process [J]. Progress in Computational Fluid Dynamics, 2010, 10: 292-9.
[13]  Pan Y, Witt P, Kuan B, Xie D. CFD simulation of slag droplet formation by a spinning disc in dry slag granulation processes[C]//8th International Conference on Computational Fluid Dynamics in the Oil & Gas, Metallurgical and Process Industries[C]. Trondheim, 2011.
[14]  Yang Zhiyuan(杨志远), Zhou Yangmin(周扬民), et al. Experimental study of dry centrifugal granulation of blast furnace slag [J]. Science Technology and Engineering(科学技术与工程), 2009, (23): 7257-7260.
[15]  Yan Zhaomin(闫兆民), Zhou Yangmin(周扬民),et al. Experimental study of plates dry granulation of BF slag [J]. Energy for Metallurgical Industry(冶金能源), 2010, 29(3): 44-46.
[16]  Du Bin(杜滨), Zhang Yanguo(张衍国). Centrifugal granulation experimental study of molten blast furnace slag by rotary disc [J]. Energy for Metallurgical Industry(冶金能源), 2013, 32(4): 29-32.
[17]  Chen Xiaoyan(陈小艳), Zhou Wu(周骛), Cai Xiaoshu(蔡小舒), et al. Particle size distribution measurement of large spray by imaging [J]. CIESC Journal(化工学报), 2014, 65(2): 480-487.
[18]  Dombrowski N, Johns W R. The aerodynamic instability and disintegration of viscous liquid sheets [J]. Chemical Engineering Science, 1963, 18(3): 203-214.
[19]  Leneweit G, Roesner K G, Koehler R. Surface instabilities of thin liquid film flow on a rotating disk [J]. Experiments in Fluids, 1999, 26(1/2): 75-85.
[20]  Strutt J W, Rayleigh L. On the instability of jets [J]. Proc. London Math. Soc., 1878, 10: 4-13.
[21]  Kamiya T. Analysis of the ligament-type disintegration of thin liquid film at the edge of a rotating disc [J]. Journal of Chemical Engineering of Japan, 1972, 5(4): 391-396.
[22]  Castleman R A. The mechanism of the atomization of liquids [J]. Bureau of Standards Journal of Research, 1930, 6: 369-376.
[23]  Schweitzer P H. Mechanism of disintegration of liquid jets [J]. Journal of Applied Physics, 1937, 8(8): 513-521.
[24]  Bergwerk W. Flow pattern in diesel nozzle spray holes [J]. Proceedings of the Institution of Mechanical Engineers, 1959, 173(1): 655-660.
[25]  Shkadov V Y. Wave flow regimes of a thin layer of viscous fluid subject to gravity [J]. Fluid Dynamics, 1967, 2(1): 29-34.
[26]  Li Kai(李凯), Wang Hong(王宏), Zhu Xun(朱恂), Liao Qiang(廖强), Wu Junjun(吴君军). Experiment of liquid centrifugal atomization properties by rotary cup [J]. Iron and Steel(钢铁), 2014, 10:95-99.
[27]  Yang Hu(杨虎), Liu Qiongsun(刘琼荪), Zhong Bo(钟波). Mathematical Statistics(数理统计)[M]. Beijing: Higher Education Press, 2004.
[28]  Mizuochi T, Akiyama T, Shimada T, et al. Feasibility of rotary cup atomizer for slag granulation [J]. ISIJ International, 2001, 41(12): 1423-1428.

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