Experimental Study on Ammonia Co-Firing with Coal for Carbon Reduction in the Boiler of a 300-MW Coal-Fired Power Station  

作　　者：Qifu Lin Wangping Sun Haiyan Li Yangjiong Liu Yuwei Chen Chengzhou Liu Yiman Jiang Yu Cheng Ning Ma Huaqing Ya Longwei Chen Shidong Fang Hansheng Feng Guang-Nan Luo Jiangang Li Kaixin Xiang Jie Cong Cheng Cheng 

机构地区：[1]Institute of Energy,Hefei Comprehensive National Science Center(Anhui Energy Laboratory),Hefei 230088,China [2]Anbang Technology Co.Ltd,Tongling 244000,China [3]Institute of Plasma Physics,Hefei Institute of Matter Science,Chinese Academy of Sciences,Hefei 230031,China

出　　处：《Engineering》2024年第9期247-259,共13页工程（英文）

基　　金：supported by the National Key Research and Development Program of China(2023YFB4005700,2023YFB4005705,and 2023YFB4005702-03);the Academy-Local Cooperation Project of the Chinese Academy of Engineering(2023-DFZD-01);the National Natural Science Foundation of China(52207151);the Natural Science Foundation of Anhui Province(2208085QA29);the University Synergy Innovation Program of Anhui Province(GXXT-2022025);the independent project of the Energy Research Institute of Hefei Comprehensive National Science Center(Anhui Energy Laboratory;22KZZ525,23KZS402,22KZS301,and 22KZS304).

摘　　要：To reduce CO_(2) emissions from coal-fired power plants,the development of low-carbon or carbon-free fuel combustion technologies has become urgent.As a new zero-carbon fuel,ammonia(NH_(3))can be used to address the storage and transportation issues of hydrogen energy.Since it is not feasible to completely replace coal with ammonia in the short term,the development of ammonia-coal co-combustion technology at the current stage is a fast and feasible approach to reduce CO_(2) emissions from coal-fired power plants.This study focuses on modifying the boiler and installing two layers of eight pure-ammonia burners in a 300-MW coal-fired power plant to achieve ammonia-coal co-combustion at proportions ranging from 20%to 10%(by heat ratio)at loads of 180-to 300-MW,respectively.The results show that,during ammonia-coal co-combustion in a 300-MW coal-fired power plant,there was a more significant change in NO_(x) emissions at the furnace outlet compared with that under pure-coal combustion as the boiler oxygen levels varied.Moreover,ammonia burners located in the middle part of the main combustion zone exhibited a better high-temperature reduction performance than those located in the upper part of the main combustion zone.Under all ammonia co-combustion conditions,the NH_(3) concentration at the furnace outlet remained below 1 parts per million(ppm).Compared with that under pure-coal conditions,the thermal efficiency of the boiler slightly decreased(by 0.12%-0.38%)under different loads when ammonia co-combustion reached 15 t·h^(-1).Ammonia co-combustion in coal-fired power plants is a potentially feasible technology route for carbon reduction.

关 键 词：Coal-fired boiler Coal mixing with ammonia Ammonia-coal co-firing Nitrogen oxide(NO_(x)) CO_(2)reduction Boiler thermal efficiency 

分 类 号：TM621.2[电气工程—电力系统及自动化]