化学工程2024，Vol.52Issue(5)：71-78,8.DOI:10.3969/j.issn.1005-9954.2024.05.012
烟气再循环的综合性能模拟研究与评价
Comprehensive performance simulation and evaluation of flue gas recirculation
张群力 1郭颖杰 2黄昊天 2刘涛 2张秋月1
作者信息
- 1. 北京建筑大学供热、供燃气、通风及空调工程北京市重点实验室,北京 100044||北京建筑大学环境与能源工程学院,北京 100044||北京建筑大学北京节能减排与城乡可持续发展省部共建协同创新中心,北京 100044
- 2. 北京建筑大学供热、供燃气、通风及空调工程北京市重点实验室,北京 100044||北京建筑大学北京节能减排与城乡可持续发展省部共建协同创新中心,北京 100044
- 折叠
摘要
Abstract
Currently,flue gas recirculation technology is widely used in gas boilers for nitrogen oxide reduction.In order to thoroughly analyze the denitration effect and combustion characteristics of flue gas recirculation technology,the impact of different recirculation rates on NO generation and the main generation pathways were analyzed using CHEMKIN.FLUENT was used to study the effect of different recirculation rates on the combustion velocity field,temperature field,and concentration field inside the furnace.An analysis and comprehensive evaluation of flue gas recirculation technology were conducted from different perspectives.The results show that at a recycling rate of 25％,the NO content is only 19.26 mg/m3,a decrease of 89.79％.When the recirculation rate is 18％,the CO mass concentration in the exhaust gas is the lowest,about 150 mg/m3.The combustion temperature inside the furnace decreases from 1 927 ℃ to 1 595 ℃.And the proportion of the reaction pathway for direct conversion of N2 to thermal NO is significantly reduced,only 29.14％.Gas boilers show a trend of low NO emission and low boiler efficiency with the increase of recirculation rate.关键词
燃气锅炉/烟气再循环/低氮燃烧/燃烧特性/数学建模Key words
gas boiler/flue gas recirculation/low nitrogen combustion/combustion characteristics/mathematical modeling分类
能源与动力引用本文复制引用
张群力,郭颖杰,黄昊天,刘涛,张秋月..烟气再循环的综合性能模拟研究与评价[J].化学工程,2024,52(5):71-78,8.
