化学工程2024，Vol.52Issue(4)：1-6,6.DOI:10.3969/j.issn.1005-9954.2024.04.001
助燃空气加湿对燃气锅炉低氮燃烧性能的影响
Influence of combustion air humidification on low nitrogen combustion performance of gas boiler
摘要
Abstract
To reduce the concentration of NOx emissions from gas boilers,the use of humidified air as combustion air was explored to achieve nitrogen reduction.This study focused on simulating and experimentally investigating this approach's combustion process and efficacy.Different levels of humidity in the combustion air were studied to assess their impact on flue gas temperature and NOx emission mass concentrations.The results show that humidified air can notably lower the average NOx emission mass concentration at the furnace exit.When the humidity in the secondary air is increased to 76.90 g/kg,NOx emission mass concentration from the gas boiler can be reduced to 38.05 mg/m3,achieving a high nitrogen reduction efficiency of 71.96％.However,when the humidity in the air exceeds 57.30 g/kg,the rate of increase in CO mass concentration at the furnace exit rises sharply,leading to decreased combustion stability.Continuously elevating the water vapor content in the humidified air is unfavorable for the stable operation of the gas boiler.The introduced humidified air approach provides valuable technical insight for the nitrogen reduction retrofit of existing gas boilers.关键词
燃气锅炉/助燃空气加湿/降氮/数值模拟/燃烧特性Key words
gas boiler/combustion air humidification/NOx emissions reduction/numerical simulation/combustion characteristics分类
能源科技引用本文复制引用
张群力,周钊宇,张金亮,刘涛,肖鑫..助燃空气加湿对燃气锅炉低氮燃烧性能的影响[J].化学工程,2024,52(4):1-6,6.基金项目
北京建筑大学博士研究生科研能力提升项目(DG2023010) （DG2023010）
北京建筑大学研究生创新项目(PG2022070) （PG2022070）
