毛睿,李源,任利明,张平安,马仑,陈鑫科,张耿范,方庆艳,张成
MAO Rui,LI Yuan,REN Liming,ZHANG Ping′an,MA Lun,CHEN Xinke,ZHANG Gengfan,FANG Qingyan,ZHANG Cheng

• 1:润电能源科学技术有限公司
• 2:华中科技大学煤燃烧国家重点实验室

摘要(Abstract)：

在实际运行中，旋流对冲燃烧锅炉的大风箱分配到同层各燃烧器的流量不均匀，显著影响煤粉的燃尽特性。然而，对该炉型锅炉炉内单个燃烧器的燃尽特性研究相对较少。基于此，以一台600 MW前后墙旋流对冲锅炉为对象，开展炉内燃烧器燃尽特性及其优化的数值模拟，探究燃烧器不同配风方式、旋流强度及出力对煤粉燃尽特性影响。模拟结果表明，下层燃烧器对应的飞灰含碳量高于中、上层燃烧器；中间燃烧器对应的飞灰含碳量(平均值约0.1%)低于两侧燃烧器(平均值约3%),这与现场测量的结果基本一致。侧墙附近燃烧器煤粉的不完全燃烧是锅炉出口飞灰含碳量的主要来源。适当减少中间燃烧器的风量并增加侧墙附近燃烧器的风量对中间燃烧器煤粉的燃尽特性影响相对较小，但能有效改善靠近侧墙燃烧器煤粉的燃尽特性(飞灰含碳量从3.0%降至1.6%以内);适当增加侧墙附近燃烧器二次风旋流强度或提高中间燃烧器出力、降低侧墙附近燃烧器出力，也可有效降低侧墙燃烧器对应的飞灰含碳量(2%以内),改善锅炉煤粉燃尽特性。
In actual operation, the flow rate into the same-layer burners from the large air box is uneven for the swirl opposed-firing boiler, which will significantly affect the burnout characteristics of pulverized-coal. However, there are the research on the burn-out characteristics of single burner in the furnace. Taking a 600 MW front and rear wall swirl opposed boiler as the object, the numerical study and optimization on the burnout characteristics were carried out, and the effects of the air distribution, the swirl intensity and the burner output on burnout characteristics of pulverized coal were also studied. The simulated results show that the carbon content in the fly ash of the lower burner is higher than that of the upper and middle burners, and the carbon content(about 0.1%) in the fly ash of the middle burner is lower than that of the side burners(about 3%), which is consistent with the field measurement results. The incomplete combustion of pulverized-coal from the burner near the side walls is the main source of the carbon content in the fly ash. There is a relatively small impact on the burnout characteristics of the middle burner by appropriately reducing the air ratio of the middle burner and increasing the air ratio of the burners near the side wall, which can effectively improve the burnout characteristics of the burners near the side wall(the carbon content in fly ash reduces from 3% to less than 1.6%). Appropriately increasing the swirling intensity of the burner near the side wall, or properly increasing the output of the middle burner and reducing the combustion output of the burners near the side wall, can significantly reduce the carbon content(less than 2%) in the fly ash of the burners near the side wall and improve the pulverized coal burnout characteristics.

关键词(KeyWords)： 旋流对冲锅炉;燃烧器;燃尽特性;飞灰含碳量
swirling opposed boiler;burner;burnout characteristics;carbon content in fly ash

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划政府间国际科技创新合作资助项目(2021YFE0107300);; 中国博士后科学基金资助项目(2019M652639)

作者(Author): 毛睿,李源,任利明,张平安,马仑,陈鑫科,张耿范,方庆艳,张成
MAO Rui,LI Yuan,REN Liming,ZHANG Ping′an,MA Lun,CHEN Xinke,ZHANG Gengfan,FANG Qingyan,ZHANG Cheng

DOI: 10.13226/j.issn.1006-6772.21071501

参考文献(References)：

• [1] 樊泉桂.超临界和超超临界锅炉煤粉燃烧新技术分析[J].电力设备，2006,7(2):23-25.FAN Quangui.Analysis of new pulverized coal combustion technology of super critical pressureboiler[J].Electrical Equipment,2006,7(2):23-25.
• [2] 岳峻峰，秦鹏，邹磊，等.600 MW超临界旋流燃烧烟煤锅炉NOx排放特性试验[J].中国电力，2012,45(3):62-67.YUE Junfeng,QIN Peng,ZOU Lei,et al.Experimental study on the characteristics of NOx emissions from 600 MW supercritical bituminous coal fired boiler with swirl burner[J].Electric Power,2012,45(3):62-67.
• [3] 郝剑，裴建军，由长福.劣质煤种对1 000 MW旋流对冲锅炉燃烧性能的影响[J].洁净煤技术，2019,25(5):93-100.HAO Jian,PEI Jianjun,YOU Changfu.Influence of low quality coal on the combustion performance in a 1 000 MW swirl opposed firing boiler[J].Clean Coal Technology,2019,25(5):93-100.
• [4] 茅建波，张明，熊建国，等.1 000 MW旋流对冲燃烧锅炉NOx排放特性试验研究[J].动力工程学报，2019,39(3):169-174,190.MAO Jianbo,ZHANG Ming,XIONG Jianguo,et al.Experimental study on NOx emission characteristics of a 1 000 MW opposed firing boiler [J].Journal of Chinese Society of Power Engineering,2019,39(3):169-174,190.
• [5] 李金晶，赵振宁，张清峰，等.对冲旋流锅炉的配风调整试验研究[J].热能动力工程，2016,31(8):59-63.LI Jinjing,ZHAO Zhenning,ZHANG Qingfeng,et al.Optimization on air supplication of pulverized coal fired boiler [J].Journal of Engineering for Thermal Energy and Power,2016,31(8):59-63.
• [6] 宋景慧，李兵臣，李德波，等.不同燃尽风风量对炉内燃烧影响的数值模拟[J].动力工程学报，2014,34(3):176-181.SONG Jinghui,LI Bingcheng,LI Debo,et al.Numerical simulation on effects of OFA rate on in-furnace combustion of boilers [J].Chinese Journal of Power Engineering,2014,34(3):176-181.
• [7] 颜祝明，马仑，叶骥，等.深度空气分级下混煤未燃尽碳与NOx协同优化数值模拟[J].洁净煤技术，2019,25(3):82-87.YAN Zhuming,MA Lun,YE Ji,et al.Numerical simulation of synergistic optimization of un-burned carbon and NOx of blended coal under deep air staging condition [J].Clean Coal Technology,2019,25(3):82-87.
• [8] 胡庆伟，王为术.600 MW超临界对冲锅炉分级燃烧特性[J].洁净煤技术，2019,25(2):69-75.HU Qingwei,WANG Weishu.Staged combustion characteristics of a 600 MW supercritical opposed boiler [J].Clean Coal Technology,2019,25(2):69-75.
• [9] 李德波，沈跃良，宋景慧，等.改变燃尽风风量配比对660 MW超超临界前后对冲煤粉锅炉炉内燃烧影响的数值模拟研究[J].广东电力，2013,26(6):5-10,59.LI Debo,SHEN Yueliang,SONG Jinghui,et al.Numerical simulation study on impact of changing burnt-out air volume proportion on furnace combustion of 660 MW supercritical before and after hedge pulverized coal-fired boiler[J].Guangdong Electric Power,2013,26(6):5-10,59.
• [10] 胡志宏，郝卫东，薛美盛，等.1 000 MW超超临界燃煤锅炉燃烧与NOx排放特性试验研究[J].机械工程学报，2010,46 (4):105-109.HU Zhihong,HAO Weidong,XUE Meisheng,et al.Experimental study on combustion and NOx emission characteristic of 1 000 MW ultra-supercritial coal-fired boiler[J].Journal of Mechanical Engineering,2010,46 (4):105-109.
• [11] 方庆艳，汪华剑，陈刚，等.超超临界锅炉磨煤机组合运行方式优化数值模拟[J].中国电机工程学报，2011,31(5):1-6.FANG Qingyan,WANG Huajian,CHEN Gang,et al.Optimal simulation on the combustion model of mills for an ultra-supercritial coal-fired boiler[J].Proceedings of the CSEE,2011,31(5):1-6.
• [12] 范庆伟，张帆，刘定坡，等.锅炉二次风箱流量分配特性数值模拟[J].热力发电，2014(5):87-90.FAN Qingwei,ZHANG Fan,LIU Dingbo,et al.Numerical simulation on air flow distribution characteristics in boiler secondary-air-box[J].Thermal Power Generation,2014(5):87-90.
• [13] 马启磊，刘森，张华磊，等.锅炉风箱二次风流量分配对燃烧特性的影响[J].热能动力工程，2019,34(11):52-58,88.MA Qilei,LIU Sen,ZHANG Hualei,et al.Influence of secondary-air-box air distribution on the combustion of a utility boiler[J].Journal of Engineering for Thermal Energy and Power,2019,34(11):52-58,88.
• [14] 吕洪坤，华国钧，童家麟，等.1 000 MW机组旋流燃烧器风量分布特性的数值模拟[J].热能动力工程，2017,32(1):86-90,124.LYU Hongkun,HUA Guojun,TONG Jialin,et al.Numerical simulation on air flow distribution characteristics for 1 000 MW swirl burners[J].Journal of Engineering for Thermal Energy and Power,2017,32(1):86-90,124.
• [15] 胡志宏，杨兴森，王军，等.1 000 MW 超超临界锅炉燃烧优化调整[J].锅炉技术，2008,39(4):42-46.HU Zhihong,YANG Xingsen,WANG Jun,et al.Combustion optimization of 1 000 MW ultra-supercritical once-through boiler[J].Boiler Technology,2008,39(4):42-46.
• [16] 赵斯楠，方庆艳，马仑，等.燃烧初期化学当量比对锅炉NOx生成与排放特性的影响[J].燃烧科学与技术，2017,23(3):236-241.ZHAO Sinan,FANG Qingyan,MA Lun,et al.Influence of stoichiometric ratio at initial combustion stage on NOx formation and emission characteristics of a utility boiler[J].Journal of Combustion Science and Technology,2017,23(3):236-241.
• [17] 马仑，方庆艳，张成，等.600 MW W型火焰锅炉拱上二次风低NOx燃烧特性的数值模拟及优化[J].燃烧科学与技术，2016,22(1):64-70.MA Lun,FANG Qingyan,ZHANG Cheng,et al.Numerical simulation and optimization for the influence of the arch secondary air on low-NOx combustion characteristics of a 600 MW down-fired boiler[J].Journal of Combustion Science and Technology,2016,22(1):64-70.