化工进展2023，Vol.42Issue(12)：6600-6608,9.DOI:10.16085/j.issn.1000-6613.2023-0091
热泵型烟气余热回收及降氮系统性能
Analysis of heat pump flue gas waste heat recovery and nitrogen reduction system
摘要
Abstract
To solve the heat loss and pollution caused by the exhaust gas of gas boilers,this paper proposed a synergistic system for waste heat recovery and low nitrogen oxides combustion.The system used heat exchanger and heat pump evaporator to recover waste heat of flue gas in different stages to realize deep waste heat recovery and waste water recovery of flue gas,and achieve the effect of"wet plume removal".Meanwhile,the recycled hot water was used to heat the humidified and combustion air,achieving nitrogen reduction effect of flue gas.A heat pump flue gas waste heat recovery and nitrogen reduction experimental bench was built.The results showed that when the return temperature and the return flow of the heating network were respectively 40℃and 1853L/h,experimental system could reduce nitrogen oxides emissions by 60.6%,and the exhaust gas temperature could be reduced to 24.5℃.The system could recover 6.9%of the heat while maintaining a minimum nitrogen oxides emission of 39.7mg/m3,which meant that the system could meet the high-efficiency and clean production requirements of the energy system at the same time.In addition,the annual amount of residual water recovery was 20.2-31.2t/a,which proved that the system can synergistically deal with condensing waste heat recovery,nitrogen emission reduction,residual water recovery and whitening of gas boilers.The minimum payback period of the system investment was about 4.0 years.关键词
燃气锅炉/余热回收/热泵/低氮排放/助燃空气加湿Key words
gas boiler/waste heat recovery/heat pump/low nitrogen emission/combustion-air humidification分类
能源科技引用本文复制引用
张群力,汪玉诗,翟洪宝,郭颖杰,张秋月,黄昊天..热泵型烟气余热回收及降氮系统性能[J].化工进展,2023,42(12):6600-6608,9.基金项目
北京市自然科学基金重点项目(SQKZ201510016001) （SQKZ201510016001）
北京建筑大学研究生创新项目(PG2022070). （PG2022070）
