Experimental study on NO_(x)emission characteristics under oxy-fuel combustion

作     者：Haibo Wu Zhiyong An Kai Zhang Yu Mao Zhimin Zheng Zhaohui Liu 

作者机构：Tianjin Guoneng Panshan Power Generation Co.LtdTianjin301907China China Energy Investment CorporationBeijing100011China Dongfang Boiler(Group)Co.Ltd.Zigong643001China Anhui University of TechnologyMaanshanAnhui243099China Huazhong University of Science and TechnologyWuhanHubei430074China 

出 版 物：《Clean Energy》 (清洁能源（英文）)

年 卷 期：2023年第7卷第3期

页      面：595-601页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 070304[理学-物理化学(含∶化学物理)] 0703[理学-化学] 

主　　题：experimental research NO_(x) oxy-fuel combustion SO_(2)/SO_(3) 

摘      要：This study focuses on the emission characteristics of NO_(x)under oxy-fuel combustion conditions.A comparative analysis with air combustion was performed.NO_(x)emission,control measures and influence factors under different working conditions were studied.Experiments were carried out on a 3-MWth test platform and a laboratory platform.The‘π’-type furnace was adopted,with the fur-nace width of 2.6 m,depth of 2.0 m and height of 10.5 m for the 3-MWth coal-fired boiler.NO_(x)emissions at different oxygen concen-trations and different air distribution were investigated;the effects of H2O and CO_(2)concentration on denitrification efficiency and SO_(2)/SO_(3)conversion rate were explored.Experiment results suggest that,compared with air combustion,NO concentration(volume basis)at the furnace outlet under oxy-fuel combustion is higher than that of air combustion,but the amount of NO_(x)emissions in the discharged gas significantly decrease compared to the air combustion conditions.In addition,the formation of NO_(x)can be effectively controlled through staged combustion.Furthermore,the selective catalytic reduction(SCR)denitrification efficiency and the con-version rate of SO_(2)to SO_(3)decreases when the CO_(2)concentration and the H2O content increase,indicating that CO_(2)and H2O have an adverse effect on the performance of the catalyst.Additionally,compared with CO_(2)concentration,H2O content has a greater effect on catalyst performance.