热力发电2025，Vol.54Issue(3)：90-98,9.DOI:10.19666/j.rlfd.202407187
烟煤与贫煤挥发分含量差异对氨煤混燃NOx生成特性影响
Effects of different volatile contents between bituminous and lean coals on NOx formation characteristics of ammonia-coal cofiring
刘欣 1张文振 1王耿辉 2谢妍 2李明 3牛涛 3王赫阳2
作者信息
- 1. 烟台龙源电力技术股份有限公司,山东 烟台 264006||天津大学机械工程学院,天津 300350
- 2. 天津大学机械工程学院,天津 300350
- 3. 烟台龙源电力技术股份有限公司,山东 烟台 264006
- 折叠
摘要
Abstract
Ammonia cofiring in coal-fired boilers is one of the promising technical routes for decarbonization of existing coal-fired power plants.However,ammonia cofiring may potentially result in drastic increase of NOx emissions due to its high nitrogen content.Effective control of NOx emissions is thus one of the key factors that affect the technical feasibility of ammonia cofiring in coal-fired boilers.The formation of NOx during ammonia-coal cofiring is affected by the ammonia combustion as well as its interaction with the coal combustion process.There are significant differences in volatile content of different coal types which may strongly affect the NOx formation characteristics of ammonia cofiring.For this reason,the NOx formation characteristics of ammonia cofiring with bituminous and lean coals that have distinct volatile contents are investigated by an experimental rig that allows for flexible control of the combustion environment of ammonia.The results show that,the NOx emissions from bituminous and lean coals show different trends with the increase of ammonia cofiring ratio under different ammonia cofiring modes.Because of the significant differences in volatile matter content between bituminous and lean coals and the consequent differences in the amount of O2 consumption,the distributions of O2 concentration in the furnace are substantially different between the two coals.This results in different competition relationships between the NO formation and reduction reactions of ammonia in the furnace,which consequently leads to different NOx formation and emission characteristics between the two coals.关键词
氨煤混燃/碳减排/NOx排放/燃煤锅炉/挥发分Key words
ammonia-coal cofiring/carbon reduction/NOx emission/coal-fired boiler/volatile引用本文复制引用
刘欣,张文振,王耿辉,谢妍,李明,牛涛,王赫阳..烟煤与贫煤挥发分含量差异对氨煤混燃NOx生成特性影响[J].热力发电,2025,54(3):90-98,9.
