当前位置: X-MOL 学术Atmos. Pollut. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
CFD analysis of influencing factors on SCR denitration efficiency of sintering flue gas based on response surface methodology
Atmospheric Pollution Research ( IF 4.5 ) Pub Date : 2021-06-09 , DOI: 10.1016/j.apr.2021.101107
Mengmeng Ye , Fuping Qian , Yihua Gao , Jinli Lu , Yunlong Han , Naijin Huang , Bing Xu , Hao Wu

Selective catalytic reduction(SCR) technology is the key technology of flue gas denitration. SCR reactors are the systems contributing to pollution-free emission if they function properly. In order to study SCR denitration chemical reaction simulation and optimize the denitration effect, the CFD analysis of SCR reactor was carried out. The realizable k-ϵ turbulence model, component transport model and chemical reaction model were used to simulate the SCR denitration reactor. Based on the response surface methodology (RSM), the effects of three factors on the denitration efficiency were studied, including catalyst inlet gas velocity, reaction temperature and NH3/NO molar ratio. The quadratic multinomial regression model of three factors affecting the denitration efficiency was established. In addition, the structure of hot air duct and guiding plate were optimized based on the non-uniform inlet temperature. The results showed that: three factors had a significant impact on the denitration efficiency, and the interaction of catalyst inlet gas velocity and reaction temperature is the most significant; the structure optimization of hot air duct and guiding plate can improve the denitration efficiency and reduce outlet NO concentration relative standard deviation, and avoid catalyst abrasion. In this paper, a suitable numerical simulation model is proposed for SCR denitration reaction, and the consideration of non-uniform inlet temperature and the proposition about taking relative standard deviation of NO concentration at the outlet as an optimization index contribute to a more practical and more reasonable structure optimization.



中文翻译:

基于响应面法的烧结烟气SCR脱硝效率影响因素CFD分析

选择性催化还原(SCR)技术是烟气脱硝的关键技术。SCR 反应器是在正常运行的情况下有助于实现无污染排放的系统。为研究SCR脱硝化学反应模拟,优化脱硝效果,对SCR反应器进行CFD分析。利用可实现的k-ϵ湍流模型、组分传输模型和化学反应模型来模拟 SCR 脱硝反应器。基于响应面法(RSM),研究了催化剂入口气速、反应温度和NH 3三个因素对脱硝效率的影响。/NO摩尔比。建立了影响脱硝效率的三个因素的二次多项式回归模型。此外,针对入口温度不均匀,优化了热风道和导流板的结构。结果表明:三个因素对脱硝效率有显着影响,其中催化剂入口气速与反应温度的交互作用最为显着;热风道和导流板结构优化,提高脱硝效率,降低出口NO浓度相对标准偏差,避免催化剂磨损。本文提出了一种适用于 SCR 脱硝反应的数值模拟模型,

更新日期:2021-06-11
down
wechat
bug