Hydrodynamic Characteristics and Particle Removal Efficiency Off-gas from Urea Prilling Tower in Spraying Scrubber

被引：0
作者：
Wang S.-M. [1 ]
Wang J.-R. [1 ]
Song C. [1 ]
Zhang Z.-X. [1 ]
Wen J. [2 ]
机构：
[1] School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an
[2] School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an
来源：
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2018年 / 32卷 / 04期
关键词：
Numerical simulation; Removal efficiency; Spray; Urea prilling tower;
D O I：
10.3969/j.issn.1003-9015.2018.00.006
中图分类号：
学科分类号：
摘要：
Spray scrubbing is effective to remove hydrophilic particles from Urea Prilling Tower. Simulation of dust removal based on particle capture mechanism was investigated for spray scrubbing process. Numerical simulation and experiments were conducted to study flow characteristics and key factors such as gas velocity, spraying density and particle size were analyzed. The results show that: 1) air flow near wall has maximum velocity with wall flow, which leads to dust escape. 2) particle removal efficiency increases with the increase of spraying density, but the increase rate gradually decreases. Dust removal efficiency does not always decrease with the increase of gas velocity. For example, when spraying density is 2 m∙h-1 and gas velocity is 2.5 m∙s-1, removal efficiency increases. 3) Removal efficiency of particles > 10μm can reach 95%. However, the removal of particles < 10 μm is difficult due to the random movement of fine particles. 4) gas velocity has few effects on particle removal efficiency. Therefore, it is more effective to improve particle removal efficiency by increasing spraying density. © 2018, Editorial Board of Journal of Chemical Engineering of Chinese Universities". All right reserved."
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页码：785 / 793
页数：8
相关论文
共 18 条
  • [1] Li S.-Y., Han L., Recovery process of dust from urea prilling tower, Chemical Industry and Engineering Progress, 28, 51, pp. 243-244, (2009)
  • [2] Tang H., Numerical studies of falling droplet, (2007)
  • [3] Luca Inzoli F., Multiphase euler-lagrange CFD simulation applied to wet flue gas desulphurization technology, International Journal of Multiphase Flow, 35, 2, pp. 185-194, (2009)
  • [4] Meng X.-Y., Numerical studies of falling droplet, (2015)
  • [5] Ding Z.-J., Liu B.-T., Xiao L.-C., Numerical simulation on gas-liquid phase flow of flue gas purification spray scrubber for boron ferroalloy, Environmental Engineering, 33, 3, pp. 82-87, (2015)
  • [6] Liu J.-Y., Numerical simulation on gas-liquid phase flow of flue gas purification spray scrubber for boron ferroalloy, (2015)
  • [7] Zhao Z.-H., Yu L., Liang C.-Z., A study on improving the efficiency of wet flue gas desulphurization and dust removal, Journal of Beijing Institute of Petro-chemical Technology, 22, 3, pp. 18-21, (2014)
  • [8] Huan X.-Z., He Y.-D., Wang S.-L., Experiments about synergistic dust removal by WFGD system, Thermal Power Generation, 46, 7, pp. 97-102, (2017)
  • [9] Zhang L.-D., Li X.-B., Wang Q., Performance of dust removal in a multi-layer spray column scrubber, Chemical Industry and Engineering Progress, 36, 7, pp. 2375-2380, (2017)
  • [10] Amitava B., Manindra N.B., Particulate scrubbing in high-velocity water sprays, Journal of Chemical Engineering of Japan, 33, 3, pp. 514-518, (2004)
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