Numerical simulation of desulfurization in a spouted bed using activated semi-coke particles

被引：0

作者：

Zhu W. ^{[1
]}

Xing L. ^{[1
]}

Zhu R. ^{[1
]}

机构：

[1] College of Aerospace and Civil Engineering, Harbin Engineering University

来源：

Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2011年 / 32卷 / 06期

关键词：

Activated semi-coke; Flue gas desulfurization; Numerical simulation; Spouted bed; Two-fluid model;

D O I：

10.3969/j.issn.1006-7043.2011.06.009

中图分类号：

学科分类号：

摘要：

For energy conservation and emission reduction, a spouted bed reactor using activated semi-coke particles to remove SO2 from flue gases was studied. The behavior of a gas-solid flow in the spouted bed was simulated by using the Euler-Euler two-fluid modeling approach, incorporating a kinetic-frictional constitutive model for dense assemblies of the particles. The developed model of a heterogeneous reaction considering the effect of the concentration of activated semi-coke was also used to predict the rate of desulfurization in the spouted bed. The distribution of SO2 and overall flow patterns including a stable spout region, a fountain region, and an annular down comer region within the spouted bed were obtained well. Then, the simulation results of different operating conditions were compared. The results show that the rate of desulfurization in the annular region is much higher, and the temperature of reaction along with the concentrations of O2 and H2O in flue gases have a prominent effect on efficiency of desulfurization. The humidity in the flue gas was increased by 4% and the efficiency of desulfurization was increased by 20% or so. Such research verifies that the efficiency of desulfurization in the spouted bed will be enhanced by proper elevation of the reacting temperature, the concentrations of O2, and humidity in flue gases.

引用

页码：742 / 747

页数：5

共 13 条

[1] Li Z., Shangguan J., Li C., Et al., Research progress of removal SO2 from flue gases using activated char, Journal of Taiyuan University of Technology, 33, 2, pp. 179-188, (2002)
[2] Yang B., Jiang W., Chang Q., Modification of activated carbon by microwave irradiation and its desulfurization capability, Journal of Lanzhou Jiaotong University, 25, 4, pp. 51-54, (2006)
[3] Guo D., Experimental study on kinetic parameter in the process of dry NO removal by activated carbon, pp. 20-53, (2004)
[4] Shangguan J., Change mechansim of physical structure and surface functional groups of activated semi-cokes used in SO2 removal from flue gas, pp. 44-60, (2005)
[5] Cheng Z., Jiang Z., Yuan W., Investigation on desulfurization by activated carbon II: Reaction kinetics of SO2 oxidation with existence of water vapor, Acta Scientiae Circumstantiae, 3, 17, pp. 273-277, (1997)
[6] Zhang J., An experimental study on activated coke flue-gas desulphurization, pp. 52-59, (2008)
[7] Chu Y., Yin H., Liu Z., Et al., Study on catalytics reaction kinetics about the process of desulfurization by activated carbon fiber (ACF), Sichuan Circumstance, 2, 20, pp. 8-11, (2001)
[8] Yoshikawa M., Grulke E., Andrews R., Kinetic study of the continuous removal of SOx on polyacrylonitrile-based activated carbon: Kinetic study, Fuel, 79, 6, pp. 537-541, (1997)
[9] Zhang X., Ren H., Li K., Et al., Catalytic reaction kinetics of flue gas desulphurization by activated semi-coke, Journal of China University of Mining and Technology, 36, 2, pp. 210-214, (2007)
[10] Ren H., Zhang X., Kou Z., Et al., Study of removal process of SO2 in flue gas desulphurization by activated semi-coke under kinetic conditions, Journal of Zhengzhou University: Engineering Science, 29, 2, pp. 99-104, (2008)

← 1 2 →