基于CFD模拟的臭氧低温氧化烧结烟气中NO过程分析

曲江源; 刘霄龙; 关彦军; 齐娜娜; 滕阳; 徐文青; 朱廷钰; 张锴

doi:10.11949/0438-1157.20190418

您当前的位置：

首页 >

文章列表页 >

基于CFD模拟的臭氧低温氧化烧结烟气中NO过程分析

能源和环境工程 | 更新时间：2020-06-24

- 基于CFD模拟的臭氧低温氧化烧结烟气中NO过程分析
- CFD simulation of low-temperature NO oxidation using ozone in sintering flue gas
- 化工学报 2019年70卷第11期页码：4387-4396
- 作者机构：
  
  1.华北电力大学热电生产过程污染物监测与控制北京市重点实验室，北京 102206
  2.中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室，北京 100190
- 作者简介：
  
  曲江源（1993—），男，博士研究生，qujy_ncepu@163.com
  张锴(1968—)，男，博士，教授，kzhang@ncepu.edu.cn
- 基金信息：
  
  国家重点研发计划项目(2017YFC0210600);中央高校基本科研业务费专项资金(2017MS020;2018ZD03)
- DOI：10.11949/0438-1157.20190418
  中图分类号： X 511
- 收稿：2019-04-21，
  
  修回：2019-08-16，
  
  纸质出版：2019-11-05
- 稿件说明：
移动端阅览
曲江源, 刘霄龙, 关彦军, 齐娜娜, 滕阳, 徐文青, 朱廷钰, 张锴. 基于CFD模拟的臭氧低温氧化烧结烟气中NO过程分析[J]. 化工学报, 2019, 70(11): 4387-4396

QU Jiangyuan, LIU Xiaolong, GUAN Yanjun, QI Nana, TENG Yang, XU Wenqing, ZHU Tingyu, ZHANG Kai. CFD simulation of low-temperature NO oxidation using ozone in sintering flue gas[J]. CIESC Journal, 2019, 70(11): 4387-4396
曲江源, 刘霄龙, 关彦军, 齐娜娜, 滕阳, 徐文青, 朱廷钰, 张锴. 基于CFD模拟的臭氧低温氧化烧结烟气中NO过程分析[J]. 化工学报, 2019, 70(11): 4387-4396 DOI： 10.11949/0438-1157.20190418.

QU Jiangyuan, LIU Xiaolong, GUAN Yanjun, QI Nana, TENG Yang, XU Wenqing, ZHU Tingyu, ZHANG Kai. CFD simulation of low-temperature NO oxidation using ozone in sintering flue gas[J]. CIESC Journal, 2019, 70(11): 4387-4396 DOI： 10.11949/0438-1157.20190418.

摘要

以256 m

烧结机O

氧化烧结烟气中NO过程为研究对象，采用CFD数值模拟方法考察了含O

喷射气体与烧结烟气流动及NO低温氧化特性。通过与76步复杂反应机理的对比验证了11步简化机理的适用性，分析了反应温度、O

/NO摩尔比以及O

分布特性对NO氧化效率和不同价态NO

转化率的影响规律。通过对简单结构反应器的模拟结果表明：NO

稳定性较差，烟道内主要氧化产物为NO

与N

；随反应温度升高，NO氧化效率基本保持不变，NO

转化率提高且提升速率逐渐增大而N

呈相反规律；随O

/NO摩尔比增大，NO氧化效率提高但提升速率逐渐减小，NO

转化率先增大后在摩尔比高于1.25时开始减小，而各工况均产生N

且生成量逐渐增大，其原因为射流核心区可提供高O

/NO摩尔比条件；通过优化O

分布器结构改善O

与烟气接触与混合条件，O

与NO摩尔比为1.0、停留时间为0.87 s时NO氧化率可提高约12.8%，摩尔比为2.0、停留时间为1.73 s时N

转化率可提高约15.6%。

Abstract

The flue gas from a 256 m

sintering machine was selected to explore the characteristics of NO oxidized by ozone at low temperature. The flow characteristics of O

injection gas and sintering flue gas and NO oxidation characteristics were investigated by CFD numerical simulation method. By compared with 76-step complex reaction mechanism

11-step simplified mechanism was verified to be reasonable for the above process. The effects of process conditions

including reaction temperature

/NO molar ratio and O

distribution

on the conversion rates of NO

with different chemical valences were examined. The results from the simulation for the reactor

which is simple in structure

show that NO

and N

are the main oxidation products in the flue gas

whilst NO

is consumed due to its poor chemical stability. The oxidation efficiency of NO changes little with the increase of reaction temperature

the conversion rate of NO

increases and performs more significant change at higher temperature. However

the conversion rate of N

presents an opposite trend compared with that of NO

. With the raise of O

/NO molar ratio

the oxidation rate of NO increases slowly and that of NO

increases firstly and then decreases when the molar ratio higher than 1.25

while N

emerges in the condition even the O

/NO molar ratio less than 1.0 and the N

production increases gradually

resulting from a higher O

/NO ratio in the injection core regions. Furthermore

the structural optimization for the ozone distributor could improve the homogeneity of O

in the sintering flue gas. Afterwards the oxidation efficiency of NO increases by 12.8% approximately when the O

/NO molar ratio is 1.0 and the average residence time is 0.87 s

while the increase for N

conversion rate of about 15.6% was obtained when the O

/NO molar ratio is 2.0 and the average residence time is 1.73 s.

关键词

Keywords

references

闫伯骏 , 邢奕 , 路培 , 等 . 钢铁行业烧结烟气多污染物协同净化技术研究进展 [J]. 工程科学学报 , 2018 , 40 ( 7 ): 767 - 775 .

Yan B J , Xing Y , Lu P , et al . A critical review on the research progress of multi-pollutant collaborative control technologies of sintering flue gas in the iron and steel industry [J]. Chinese Journal of Engineering , 2018 , 40 ( 7 ): 767 - 775 .

朱廷钰 , 刘青 , 李玉然 , 等 . 钢铁烧结烟气多污染物的排放特征及控制技术 [J]. 科技导报 , 2014 , 32 ( 33 ): 51 - 56 .

Zhu T Y , Liu Q , Li Y R , et al . Emission characteristics of multiple pollutants from iron-steel sintering flue gas and review of control technologies [J]. Science & Technology Review , 2014 , 32 ( 33 ): 51 - 56 .

纪瑞军 , 徐文青 , 王健 , 等 . 臭氧氧化脱硝技术研究进展 [J]. 化工学报 , 2018 , 69 ( 6 ): 2353 - 2363 .

Ji R J , Xu W Q , Wang J , et al . Research progress of ozone oxidation denitrification technology [J]. CIESC Journal , 2018 , 69 ( 6 ): 2353 - 2363 .

李和平 , 吴胜利 , 韩加友 . “臭氧氧化+循环流化床”法烧结烟气净化技术的应用 [J]. 烧结球团 , 2018 , 43 ( 6 ): 1 - 6+18 .

Li H P , Wu S L , Han J Y . Application of sintering flue gas cleaning technology with method of “ozone oxidation and circulating fluidized bed” [J]. Sintering and Pelletizing , 2018 , 43 ( 6 ): 1 - 6+18 .

杨颖欣 , 薛学良 , 刘勇 , 等 . 钢铁烧结烟气臭氧氧化脱硝正交实验研究 [J]. 环境科学与技术 , 2018 , 41 ( S1 ): 139 - 144 .

Yang Y X , Xue X L , Liu Y , et al . Orthogonal experiments on ozonation denitration of iron-steel sintering flue gas [J]. Environmental Science & Technology , 2018 , 41 (S 1 ): 139 - 144 .

郄俊懋 , 张春霞 , 王海风 , 等 . 烧结烟气典型污染物排放形势及减排技术分析 [J]. 烧结球团 , 2016 , 41 ( 6 ): 59 - 64 .

Xi J M , Zhang C X , Wang H F , et al . Analysis of emission situation and emission reduction technology of typical sintering flue gas pollutants [J]. Sintering and Pelletizing , 2016 , 41 ( 6 ): 59 - 64 .

Lin F , Wang Z H , Ma Q , et al . N 2 O 5 Formation mechanism during the ozone-based low-temperature oxidation DeNO x process [J]. Energy & Fuels , 2016 , 30 ( 6 ): 5101 - 5107 .

代绍凯 , 徐文青 , 陶文亮 , 等 . 臭氧氧化法应用于燃煤烟气同时脱硫脱硝脱汞的实验研究 [J]. 环境工程 , 2014 , 32 ( 10 ): 85 - 89 .

Dai S K , Xu W Q , Tao W L , et al . Experimental research for the application of O 3 oxidation in simultaneous removal of SO 2 , NO and Hg in coal-fired flue gas [J]. Environmental Engineering , 2014 , 32 ( 10 ): 85 - 89 .

庄卓楷 . 基于数值模拟的NO臭氧氧化反应、双旋流气气混合器和湿法脱硝模型研究 [D]. 杭州 : 浙江大学 , 2015 .

Zhuang Z K . Research on no ozonation process & double swirl gas mixer & denitration model in spray absorber based on numerical simulation [D]. Hangzhou : Zhejiang University , 2015 .

王智化 , 周俊虎 , 温正城 , 等 . 利用臭氧同时脱硫脱硝过程中NO的氧化机理研究 [J]. 浙江大学学报(工学版) , 2007 , 41 ( 5 ): 765 - 769 .

Wang Z H , Zhou J H , Wen Z C , et al . Mechanism investigation on NO oxidization during NO x and SO 2 simultaneous removal process by ozone [J]. Journal of Zhejiang University(Engineering Science) , 2007 , 41 ( 5 ): 765 - 769 .

杨业 , 徐超群 , 朱燕群 , 等 . 臭氧氧化结合硫代硫酸钠溶液喷淋同时脱硫脱硝 [J]. 化工学报 , 2016 , 67 ( 5 ): 2041 - 2047 .

Yang Y , Xu C Q , Zhu Y Q , et al . Simultaneous removal of SO 2 and NO x by combination of ozone oxidation and Na 2 S 2 O 3 solution spray [J]. CIESC Journal , 2016 , 67 ( 5 ): 2041 - 2047 .

Zheng C H , Xu C R , Zhang Y X , et al . Nitrogen oxide absorption and nitrite/nitrate formation in limestone slurry for WFGD system [J]. Applied Energy , 2014 , 129 : 187 - 194 .

李典泽 , 唐晓龙 , 易红宏 , 等 . 臭氧定量氧化联合湿法吸收同时脱硫脱硝 [J]. 环境工程学报 , 2017 , 11 ( 6 ): 3570 - 3576 .

Li D Z , Tang X L , Yi H H , et al . Simultaneous removal of NO x and SO 2 with O 3 quantitative oxidation [J]. Chinese Journal of Environmental Engineering , 2017 , 11 ( 6 ): 3570 - 3576 .

Ji R J , Wang J , Xu W Q , et al . Study on the key factors of NO oxidation using O 3 : the oxidation product composition and oxidation selectivity [J]. Industrial & Engineering Chemistry Research , 2018 , 57 : 14440 - 14447 .

Mok Y S , Lee H J . Removal of sulfur dioxide and nitrogen oxides by using ozone injection and absorption–reduction technique [J]. Fuel Processing Technology , 2006 , 87 ( 7 ): 591 - 597 .

王智化 , 周俊虎 , 魏林生 , 等 . 用臭氧氧化技术同时脱除锅炉烟气中NO x 及SO 2 的试验研究 [J]. 中国电机工程学报 , 2007 , 27 ( 11 ): 1 - 5 .

Wang Z H , Zhou J H , Wei L S , et al . Experimental research for the simultaneous removal of NO x and SO 2 in flue gas by O 3 [J]. Proceedings of the CSEE , 2007 , 27 ( 11 ): 1 - 5 .

Wang Z H , Zhou J H , Zhu Y Q , et al . Simultaneous removal of NO x , SO 2 and Hg in nitrogen flow in a narrow reactor by ozone injection: experimental results [J]. Fuel Processing Technology , 2007 , 88 ( 8 ): 817 - 823 .

Sun C L , Zhao N , Zhuang Z K , et al . Mechanisms and reaction pathways for simultaneous oxidation of NO x and SO 2 by ozone determined by in situ IR measurements [J]. Journal of Hazardous Materials , 2014 , 274 : 376 - 383 .

Wang Z H , Zhou J H , Fan J R , et al . Direct numerical simulation of ozone injection technology for NO x control in flue gas [J]. Energy & Fuels , 2006 , 20 ( 6 ): 2432 - 2438 .

Stamate E , Chen W , Jorgensen L , et al . IR and UV gas absorption measurements during NO x reduction on an industrial natural gas fired power plant [J]. Fuel , 2010 , 89 ( 5 ): 978 - 985 .

Wang H Q , Zhuang Z K , Sun C L , et al . Numerical evaluation of the effectiveness of NO 2 and N 2 O 5 generation during the NO ozonation process [J]. Journal of Environmental Sciences , 2015 , 41 ( 3 ): 51 - 58 .

曲江源 , 关彦军 , 徐文青 , 等 . 基于CFD模拟的大差异流量烧结烟气与臭氧混合特性研究 [J]. 烧结球团 , 2019 , 44 ( 1 ): 63 - 68 .

Qu J Y , Guan Y J , Xu W Q , et al . Study on mixing behavior of sintering flue gas and ozone with high differential flow based on CFD simulation [J]. Sintering and Pelletizing , 2019 , 44 ( 1 ): 63 - 68 .

Skalska K , Miller J S , Ledakowicz S . Kinetics of nitric oxide oxidation [J]. Chemical Papers-Slovak Academy of Sciences , 2010 , 64 ( 2 ): 269 - 272 .

Habchi C , Lemenand T , Valle D D , et al . Alternating mixing tabs in multifunctional heat exchanger-reactor [J]. Chemical Engineering and Processing , 2010 , 49 ( 7 ): 653 - 661 .

Barrue H , Karoui A , Sauze N L , et al . Comparison of aerodynamics and mixing mechanisms of three mixers: Oxynator™ gas-gas mixer, KMA and SMI static mixers [J]. Chemical Engineering Journal , 2001 , 84 ( 3 ): 343 - 354 .

Ghanem A , Lemenand T , Della V D , et al . Static mixers: mechanisms, applications, and characterization methods—a review [J]. Chemical Engineering Research and Design , 2014 , 92 ( 2 ): 205 - 228 .

Dora J A . Gostomczyk M A, Jakubiak M, et al . Parametric studies of the effectiveness of NO oxidation process by ozone [J]. Chemical and Process Engineering , 2009 , 32 ( 1 ): 621 - 634 .

Lei Z G , Wen C P , Chen B H . Optimization of internals for selective catalytic reduction (SCR) for NO removal [J]. Environmental Science & Technology , 2011 , 45 ( 8 ): 3437 - 3444 .

李艺凡 , 夏国栋 , 王军 . 结构参数对布置窄缝和挡板的微混合器内流体流动和混合的影响 [J]. 化工学报 , 2015 , 66 ( 10 ): 3857 - 3865 .

Li Y F , Xia G D , Wang J . Effect of structural parameters on fluid flow and mixing characteristics in micromixer with gaps and baffles [J]. CIESC Journal , 2015 , 66 ( 10 ): 3857 - 3865 .

傅鑫亮 , 闫志勇 . 仿柳叶形静态混合器的流动及混合特性 [J]. 化工学报 , 2017 , 68 ( 12 ): 4600 - 4606 .

Fu X L , Yan Z Y . Flow and mixing characteristics in willow leaf-like static mixer [J]. CIESC Journal , 2017 , 68 ( 12 ): 4600 - 4606 .

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

连续进料多腔室流化床停留时间分布数值模拟

负过载下多孔隔板对液氧贮箱蓄液性能的影响研究

氯化钛白氧化反应器结疤问题分析及数值模拟

溶质Marangoni效应对降膜流动稳定性的影响

卧式单轴捏合反应器流动与混合特性的数值模拟