CHEN Zixi;WANG Qing;WANG Quanhai;LEI Yunhong;LI Jianbo;JIA Yi;KANG Yinhu;LU Xiaofeng;

• 1:Key Laboratory of Low-grade Fuel Efficient Clean Utilization Technology and System
• 2:Chongqing University
• 3:Chongqing Furan Technology Co.
• 4:Ltd.

Abstract：

In order to demonstrate the practical application of oxygen-enriched and low-NOxstable combustion technology,the steady combustion characteristics of oxygen-enriched and low-NOxtechnology on a 300 MW sub-critical pulverized coal-fired boiler under low load were studied.After transforming the original 12 primary air burners at A and D floors of the boiler into oxygen-enriched and low-NOxones,the main operating parameters of the boiler were measured and analyzed.The influence of oxygen-enriched and low-NOx stable combustion technology on original NOxemission concentrations and flue gas temperature at the SCR inlet and the overall operating characteristics of the boiler were studied in detail.The results of field tests,daily operation and performance testing done by third parties show that the original NOxproduction is significantly reduced after the original boiler being modified and applied with oxygen-enriched and low-NOxstable combustion technology.The operation after the transformation proves that the boiler can maintain stable operation at a minimum of 23.5% load( 70.4 MW).At the same time,it can ensure that the superheated and reheated steam parameters at the boiler outlet meet the operating requirements,and the SCR inlet flue gas temperature is maintained above 280 ℃ and the original NOxgeneration concentration is lower than300 mg/Nm3,so as to achieve the ultra-low-NOxemission.The statistical analysis of boiler operation economics shows that the peak shaving capacity is greatly improved after using the oxygen-enriched and low-NOxstable combustion technology,which can make boiler operate for a long time at low load,and can be effectively put into the SCR denitration system. The average annual ignition and low-load stable combustion oil is reduced by 65%.Therefore,the oxygen-enriched and low-NOxstable combustion technology can achieve low-load stable combustion and ultra-low emission of the boiler,and greatly reduce the boiler ignition and stable combustion oil,and improve the economy of boiler.

Key Words： oxygen-enriched and low-NOx stable combustion technology;low-load stable combustion;ultra-low-NOxemission

Abstract:

Keywords:

Foundation:

Authors: CHEN Zixi;WANG Qing;WANG Quanhai;LEI Yunhong;LI Jianbo;JIA Yi;KANG Yinhu;LU Xiaofeng;

DOI: 10.13226/j.issn.1006-6772.19042601

References：

• [1]电力与能源刊讯．国家发改委发布《电力发展“十三五”规划(2016—2020年)》[J]．电力与能源，2016(6):161.Electric Power and Energy News.National Development and Reform Commission issued"Thirteenth Five-Year Plan"for electric power development(2016—2020)[J].Electric Power and Energy,2016(6):161.
• [2]张广才，周科，鲁芬，等．燃煤机组深度调峰技术探讨[J]．热力发电，2017,46(9):17-23.ZHANG Guangcai,ZHOU Ke,LU Fen,et al. Discussions on deep peaking technology of coal-fired power plants[J]. Thermal Power Generation,2017,46(9):17-23.
• [3]周强，汪宁渤，冉亮，等．中国新能源弃风弃光原因分析及前景探究[J]．中国电力，2016,49(9):7-12.ZHOU Qiang,WANG Ningbo,RAN Liang,et al. Cause analysis on wind and photovoltaic energy curtailment and prospect research in China[J].China Power,2016,49(9):7-12.
• [4]符旭．浅析火电厂大机组调峰运行方式[J]．科技创新与应用，2014(36):113.FU Xu.Analysis of peaking operation mode of large generating units in thermal power plants[J]. Science and Technology Innovation and Application,2014(36):113.
• [5]栗晓燕．火电调峰机组运行经济性研究[D]．石家庄:河北科技大学，2017:1-2.LI Xiaoyan. Research on economical operation of thermal power generation[D]. Shijiazhuang:Hebei University of Science and Technology,2017:1-2.
• [6]张也．大规模风电并网背景下火电调峰行为演化博弈模型研究[D]．北京:华北电力大学，2017:1-7.ZHANG Ye. Evolutionary game theory on thermal power peaking under large scale of wind power integration[D]. Beijing:North China Electric Power University,2017:1-7.
• [7]于亮平，赵作起．等离子装置在2 023 t/h锅炉点火和稳燃方面的应用[J]．华电技术，2009,31(10):38-42.YU Liangping,ZHAO Zuoqi. Application of plasma device in ignition and combustion stabilization of 2 023 t/h boiler[J]. Huadian Technology,2009,31(10):38-42.
• [8]董建聪，张忠孝，毕德贵，等．基于深度分级的煤粉锅炉低NOx燃烧改造及调整试验研究[C]//2018清洁高效燃煤发电技术交流研讨会论文集．北京:北京能源与环境学会，2018:5-14.DONG Jiancong,ZHANG Zhongxiao,BI Degui,et al. Experimental research on low NOxcombustion reform and adjustment of pulverized coal boiler based on deep classification[C]//Proceedings of2018 Clean and High Efficiency Coal-fired Power Generation Technology Exchange Seminar. Beijing:Beijing Society of Energy and Environment,2018:5-14.
• [9]周大明．双尺度低NOx燃烧技术在燃煤机组上的应用[J]．电力安全技术，2015,17(12):46-50.ZHOU Daming. Application of dual-scale low NOxcombustion technology in coal-fired units[J]. Electric Power Safety Technology,2015,17(12):46-50.
• [10]陈旭东，任栋，宫赫，等．燃煤电厂低NOx燃烧技术的研究[J]．冶金能源，2017,36(S2):76-78.CHEN Xudong,REN Dong,GONG He,et al. Research on low NOxcombustion technology for coal-fired power plants[J].Metallurgical Energy,2017,36(S2):76-78.
• [11]王春昌，王志刚．双分级可调低NOx燃烧技术[J]．热力发电，2015,44(6):102-105.WANG Chunchang,WANG Zhigang. Double stage adjustable low NOxcombustion technology[J].Thermal Power Generation,2015,44(6):102-105.
• [12]付俊杰．600 MW电站锅炉的低NOx燃烧改造[J]．华北电力技术，2016(7):53-58.FU Junjie.Renovation of low NOxcombustion for 600 MW power station boilers[J]. North China Electric Power Technology,2016(7):53-58.
• [13]陈冬林，叶托，李恒．低NOx燃烧技术研究现状及进展[J]．热力发电，2017,46(3):1-6.CHEN Donglin,YE Tuo,LI Heng. Current status and progress of low NOxcombustion technology research[J].Thermal Power Generation,2017,46(3):1-6.
• [14]苟湘．直流煤粉低NOx燃烧和再燃技术的实验、理论与数值模拟研究[D]．杭州:浙江大学，2007:1-6.GOU Xiang. Experimental,theoretical and numerical simulation research on direct flow pulverized coal low NOxcombustion and reburning technology[D]. Hangzhou:Zhejiang University,2007:1-6.
• [15]林兆宁．600 MW燃煤锅炉低NOx燃烧优化运行研究[D]．北京:华北电力大学，2014:1-5.LIN Zhaoning. The optimal operation research on low NOxcombustion of 600 MW coal-fired boiler[D]. Beijing:North China Electric Power University,2014:1-5.
• [16]吕旭阳．330 MW燃煤锅炉低NOx燃烧技术及数值模拟研究[D]．北京:华北电力大学，2015:1-4.LYU Xuyang.Investigation of low NOxcombustion technology and numerical simulation of a 330 MW coal-fired boiler[D].Beijing:North China Electric Power University,2015:1-4.
• [17]高建．CO2/H2O对煤燃烧过程氮氧化物生成特性影响研究[D]．武汉:华中科技大学，2019:1-3.GAO Jian. Research on the effect of CO2/H2O on the formation characteristics of nitrogen oxides during coal combustion[D].Wuhan:Huazhong University of Science and Technology,2019:1-3.
• [18]孙志君．煤粉O2/CO2/H2O燃烧条件下NO生成与还原机理[D]．武汉:华中科技大学，2019:1-5.SUN Zhijun. NO formation and reduction mechanism under pulverized coal O2/CO2/H2O combustion conditions[D]. Wuhan:Huazhong University of Science and Technology,2019:1-5.
• [19]徐迎超，蒋孝科，毛天，等．富氧气氛煤粉气流着火特性的实验研究[J]．锅炉技术，2008,39(1):42-46.XU Yingchao,JIANG Xiaoke,MAO Tian,et al Experimental study of the flow of pulverized-coal ignition speciality on oxygenenriched[J].Boiler Technology,2008,39(1):42-46.
• [20]李少华，崔凯，张海，等．富氧节油煤粉燃烧器的原理和实验研究[J]．锅炉技术，2012,43(3):47-51.LI Shaohua,CUI Kai,ZHANG Hai,et al. Principle and experimental study of oxygen-enriched high temperature air combustion burner[J].Boiler Technology,2012,43(3):47-51.
• [21]许臻，王泉海，刘名硕，等．富氧煤粉燃烧火焰成分特性试验研究[J]．锅炉技术，2017(6):37-41.XU Zhen,WANG Quanhai,LIU Mingshuo,et al.Experimental research on flame composition of oxy-coal combustion[J]. Boiler Technology,2017(6):37-41.
• [22]张玉山．1 025 t/h锅炉简单机械雾化油枪点火的改进研究[J]．热能动力工程，2015,30(2):309-313,328.ZHANG Yushan.Study of the improvement of the ignition by using a simple mechanical atomization oil gun in a 1 025 t/h boiler[J].Thermal Power Engineering,2015,30(2):309-313,328.
• [23]张雄，温治，王乃帅，等．富氧(纯氧)燃烧器的研究现状及发展趋势[J]．金属热处理，2012(1):118-124.ZHANG Xiong,WEN Zhi,WANG Naishuai,et al.Research status and development trends of oxygen-rich(pure oxygen)burners[J].Metal Heat Treatment,2012(1):118-124.
• [24]刘靖昀．富氧环境下煤粉燃烧特性试验研究[D]．杭州:浙江大学，2006:14-25.LIU Jingwei. Experimental study on pulverized coal combustion characteristics in oxygen-rich environment[D]. Hangzhou:Zhejiang University,2006:14-25.
• [25] HAGIHARA Y,HANEJI T,YAMAMOTO Y,et al.Ultra-low NOx oxygen-enriched combustion system using oscillation combustion method[J].Energy Procedia,2017,120:189-196.
• [26] DAOOD S S,NIMMO W,EDGE P,et al.Deep-staged,oxygen enriched combustion of coal[J].Fuel,2012,101:187-196.
• [27]王贲．富氧燃烧方式下典型煤种的NO释放特性及其化学反应动力学模拟[D]．武汉:华中科技大学，2012:25-34.WANG Ben.The NO release characteristics and chemical kinetics simulation of typical coals in oxy-fuel combustion[D]. Wuhan:Huazhong University of Science and Technology,2012:25-34.
• [28]丁玉辉．微油点火小油枪在粉煤锅炉上的应用[J]．中氮肥，2009(5):23-25.DING Yuhui.Application of micro-oil burner in pulverized coal fired boiler[J].Medium Nitrogen Fertilizer,2009(5):23-25.
• [29]曹志鹏．影响锅炉排烟温度的因素探析[J]．区域供热，2014(2):109-113.CAO Zhipeng.Analysis of boiler flue gas temperature effect factor[J].District Heating,2014(2):109-113.
• [30]晏桃，马晓伟．对锅炉变负荷运行的几点思考[J]．现代制造技术与装备，2011(2):71,74.YAN Tao,MA Xiaowei.Some thoughts about the changing load of the boiler[J].Modern Manufacturing Technology and Equipment,2011(2):71,74.