文献类型：期刊文献

英文题名：Numerical Investigation on the Effect of Air Humidification and Oxygen Enrichment on Combustion and Emission Characteristics of Gas Boiler

作者：Wang, Haoyu[1];Yang, Xiong[2];Li, Ziyi[2];Zhang, Chuanzhao[1];Zhu, Xianqiang[3];Zhang, Ruijuan[4];Du, Jing[1];Zhang, Shuyuan[1]

第一作者：王浩宇

通讯作者：Zhang, CZ[1]

机构：[1]Beijing Union Univ, Coll Biochem Engn, Beijing 100023, Peoples R China;[2]Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China;[3]Changzhou Univ, Sch Petr & Nat Gas Engn, Changzhou 213164, Peoples R China;[4]Beijing Heating Grp Shijingshan Branch, Beijing 100042, Peoples R China

第一机构：北京联合大学生物化学工程学院

通讯机构：[1]corresponding author), Beijing Union Univ, Coll Biochem Engn, Beijing 100023, Peoples R China.|[1141726]北京联合大学生物化学工程学院;[11417]北京联合大学;

年份：2024

卷号：12

期号：10

外文期刊名：PROCESSES

收录：;EI(收录号：20244417292843);Scopus(收录号：2-s2.0-85207423724);WOS:【SCI-EXPANDED(收录号:WOS:001342964000001)】；

基金：This research was supported by the Academic Research Projects of Beijing Union University (No. ZK20202305) and funded by R&D Program of Beijing Municipal Education Commission (No. KM202311417007), Academic Research Projects of Beijing Union University (No. ZK20202202 and No. ZK10202203), Changzhou Applied Basic Research Funding Program (CJ20235015).

语种：英文

外文关键词：gas boiler; combustion characteristics; humidity ratio; NO emission reduction

摘要：Gas boilers exhibit thermal inefficiency and unsatisfying pollutant emissions. In this study, numerical simulations were conducted to examine the effect of humidified oxygen-enriched air on methane combustion in a furnace and the effects of different premixed ratios of air on the temperature field inside the furnace, intermediate product OH groups, component concentration distribution, and pollutants. Although humidification of ambient air effectively reduced the flame center temperature and mass concentration of the NOx generated during combustion in the furnace, the highest growth rate of CO concentration at the furnace outlet was 18.6%. Humidification of oxygen-enriched air increased the center temperature and outlet NO concentration of the furnace compared with those during no oxygen enrichment, but the outlet CO concentration showed a decreasing trend, with the highest decrease rate of 34.6%. This study determined an optimal CO-air premix ratio with a moisture concentration of 50 g/kg dry air and an oxygen concentration of 23%. The air humidification and oxygen enrichment technology proposed in this article provides a technical reference for low nitrogen transformation of existing gas boilers.