@Article{fdmp.2025.055985,
AUTHOR = {Liang Ai, Mingyue Li, Lumin Chen, Yihua Gao, Yi Sun, Yue Wu, Fuping Qian, Jinli Lu, Naijin Huang},
TITLE = {Numerical Study on the Influence of Rectifier Grid on the Performances of a Cement Kiln’s SCR (Selective Catalytic Reduction) Denitrification Reactor},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {21},
YEAR = {2025},
NUMBER = {5},
PAGES = {1171--1190},
URL = {http://www.techscience.com/fdmp/v21n5/61467},
ISSN = {1555-2578},
ABSTRACT = {
In this study, Computational Fluid Dynamics (CFD) together with a component transport model are exploited to investigate the influence of dimensionless parameters, involving the height of the rectifier grid and the installation height of the first catalyst layer, on the flow field and the overall denitration efficiency of a cement kiln’s SCR (Selective catalytic reduction) denitrification reactor. It is shown that accurate numerical results can be obtained by fitting the particle size distribution function to the actual cement kiln fly ash and implementing a non-uniform particle inlet boundary condition. The relative error between denitration efficiency derived from experimental data, numerical simulation, and real-time system pressure drop ranges from 4% to 9%. Optimization of the SCR reactor is achieved when the rectifier grid thickness ratio <i>k</i>/<i>H</i> ≥ 0.030, the rectifier grid height ratio <i>h</i>/<i>H</i> = 0.04, and the spacing between the rectifier grid and the first catalyst layer <i>l</i>/<i>H</i> = 0.10. Under these conditions, airflow distribution and particle dispersion upstream of the catalyst result in increased denitration efficiencies of 3.21%, 3.43%, and 3.27%, respectively, compared to the least favorable operating conditions.},
DOI = {10.32604/fdmp.2025.055985}
}