[1]刘燮,钟文琪,李杰,等.超超临界锅炉燃烧配风优化的三维数值模拟[J].东南大学学报(自然科学版),2018,48(5):794-800.[doi:10.3969/j.issn.1001-0505.2018.05.003]
 Liu Xie,Zhong Wenqi,Li Jie,et al.Three-dimensional numerical simulation on optimization air distribution for combustion of ultra-supercritical boiler[J].Journal of Southeast University (Natural Science Edition),2018,48(5):794-800.[doi:10.3969/j.issn.1001-0505.2018.05.003]
点击复制

超超临界锅炉燃烧配风优化的三维数值模拟()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
48
期数:
2018年第5期
页码:
794-800
栏目:
能源与动力工程
出版日期:
2018-09-20

文章信息/Info

Title:
Three-dimensional numerical simulation on optimization air distribution for combustion of ultra-supercritical boiler
作者:
刘燮1钟文琪1李杰2刘龙海2刘国耀3田万军4
1 东南大学能源热转换及其过程测控教育部重点实验室, 南京 210096; 2 大唐江苏发电有限公司, 南京 210011; 3南京科远自动化集团股份有限公司, 南京 211102; 4中国大唐集团科学技术研究院有限公司, 北京 100040
Author(s):
Liu Xie1 Zhong Wenqi1 Li Jie2 Liu Longhai2 Liu Guoyao3 Tian Wanjun4
1Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China
2DaTang Jiangsu Power Generation Co., Ltd., Nanjing 210011, China
3Nanjing SCIYON Automation Group Co., Ltd., Nanjing 211102, China
4China DaTang Corporation Science and Technology Research Institute Co., Ltd., Beijing 100040, China
关键词:
超超临界锅炉 风门阻力系数 燃烧特性 数值模拟
Keywords:
ultra-supercritical boiler damper resistance coefficient combustion characteristics numerical simulation
分类号:
TK224.1
DOI:
10.3969/j.issn.1001-0505.2018.05.003
摘要:
建立了带二次风道的660 MW超超临界墙式切圆锅炉的三维数理模型,采用Realizable k-双方程湍流模型模拟气相湍流流动,采用P-1辐射模型来描述炉内辐射换热,采用混合分数/概率密度函数模型模拟气相湍流燃烧.研究了锅炉二次风风门挡板的阻力特性,并探究了附加燃尽风门挡板开度对660 MW墙式切圆锅炉燃烧与污染物排放特性的影响.结果表明:附加燃尽风风量与其风门开度阻力系数有关,当风门开度小于50%时,附加燃尽风风门阻力系数曲线斜率大幅增加,风量随开度变化的幅度增大;随着附加燃尽风门挡板开度增加,NOx浓度降低,但在炉膛上部煤粉发生二次燃烧,引起屏底烟气温度升高.
Abstract:
The three-dimensional numerical simulation was carried out to study the pulverized-coal combustion process in the 660 MW tangentially fired ultra-supercritical boiler with secondary air duct. The realizable k-e model was used to simulate gas coupled with discrete phase model for coal particles; P-1 radiation model was used to describe radiation and the mixture fraction/Probability density function(PDF)model was used to simulate the gas phase turbulence combustion. The resistance characteristics of the boiler damper are analyzed, and the influences on the combustion characteristics and pollution emission of unit wall type tangentially fired boiler are studied for four damper opening of additional air. The results show that the volume of additional air is related to its damper opening resistance coefficient, when the damper opening is less than 50%. The slope of the additional air damper resistance coefficient curve increases significantly, and the air volume changes with the opening degree. With the increase in the opening of the additional air damper, the NOxx concentration decreases, the carbon content of the fly ash increases, but the secondary combustion of the pulverized coal in the upper part of the furnace caused the temperature at the bottom of the screen to increase.

参考文献/References:

[1] Zeng L, Fu Z, Qi W, et al. Furnace combustion process simulations of a 680 MW ultra-supercritical boiler of wall tangential-firing combustion[C]// Power and Energy Engineering Conference. Shanghai,China,2012:1-4.
[2] 胡志宏, 郝卫东, 薛美盛, 等. 1000 MW超超临界燃煤锅炉燃烧与NOxx排放特性试验研究[J]. 机械工程学报, 2010, 46(4): 105-110. DOI:10.3901/JME.2010.04.105.
Hu Zhihong, Hao Weidong, Xue Meisheng, et al. Experimental study on combustion and NOxx emission characteristic of 1000 MW ultra-supercritical coal-fired boiler[J]. Journal of Mechanical Engineering, 2010, 46(4): 105-110. DOI:10.3901/JME.2010.04.105. (in Chinese)
[3] 肖海平, 张千, 王磊, 等. 燃烧调整对NOxx排放及锅炉效率的影响[J]. 中国电机工程学报, 2011, 31(8): 1-6. DOI:10.13334/j.0258-8013.pcsee.2011.08.006.
Xiao Haiping, Zhang Qian, Wang Lei, et al.Effect of combustion adjustment on NOxx emission and boiler efficiency[J]. Proceedings of the CSEE, 2011, 31(8): 1-6. DOI:10.13334/j.0258-8013.pcsee.2011.08.006. (in Chinese)
[4] Kuang M, Wu H Q, Zhu Q Y, et al. Establishing an overall symmetrical combustion setup for a 600 MWe supercritical down-fired boiler: A numerical and cold-modeling experimental verification[J]. Energy, 2018, 147: 208-225. DOI:10.1016/j.energy.2018.01.026.
[5] Kuang M, Yang G, Zhu Q, et al. Effect of burner location on flow-field deflection and asymmetric combustion in a 600 MWe supercritical down-fired boiler[J]. Applied Energy, 2017, 206:1393-1405. DOI:10.1016/j.apenergy.2018.07.010.
[6] Zhao S N, Fang Q Y, Yin C G, et al. New fuel air control strategy for reducing NOxx emissions from corner-fired utility boilers at medium-low loads[J]. Energy & Fuels, 2017, 31(7): 6689-6699. DOI:10.1021/acs.energyfuels.7b00337.
[7] Choi C R, Kim C N. Numerical investigation on the flow, combustion and NOxx emission characteristics in a 500 MWe tangentially fired pulverized-coal boiler[J]. Fuel, 2009, 88(9): 1720-1731. DOI:10.1016/j.fuel.2009.04.001.
[8] Ma L, Fang Q Y, Lv D, et al. Influence of separated overfire air ratio and location on combustion and NOxx emission characteristics for a 600 MWe down-fired utility boiler with a novel combustion system[J]. Energy & Fuels, 2015, 29(11): 7630-7640. DOI:10.1021/acs.energyfuels.5b01569.
[9] 徐璁, 王智化, 许岩韦,等. 优化配风对 NOxx 生成的影响[J]. 燃烧科学与技术, 2016, 22(3):241-246. DOI:10.11715/rskxjs.R201501012.
Xu Cong,Wang Zhihua,Xu Yanwei,et al. Influence of optimizing OFA on NOxx formation by numerical simulation[J]. Journal of Combustion Science & Technology, 2016, 22(3):241-246. DOI:10.11715/rskxjs.R201501012. (in Chinese)
[10] Sun W J, Zhong W Q, Yu A B, et al. Numerical investigation on the flow, combustion, and NOxx emission characteristics in a 660 MWe tangential firing ultra-supercritical boiler[J]. Advances in Mechanical Engineering, 2016, 8(2): 168781401663072. DOI:10.1177/1687814016630729.
[11] 许岩韦, 王智化, 王学坚,等. 燃尽风对超临界锅炉燃烧过程的影响[J]. 燃烧科学与技术, 2016, 22(3):247-251. DOI:10.11715/rskxjs.R201501016.
Xu Yanwei, Wang Zhihua, Wang Xuejian,et al. Effect of over-fired air on combustion process of supercritical boiler[J]. Journal of Combustion Science & Technology, 2016, 22(3):247-251. DOI:10.11715/rskxjs.R201501016. (in Chinese)
[12] 张倩. 600 MW对冲燃煤锅炉低NOxx改造数值模拟研究[D].保定:华北电力大学能源动力与机械工程学院, 2016.
[13] 王志刚, 禚玉群, 陈昌和, 等. 四角切圆锅炉流场伪扩散效应网格的研究[J]. 中国电机工程学报, 2007, 27(5): 22-28. DOI:10.3321/j.issn:0258-8013.2007.05.005.
Wang Zhigang, Zhuo Yuqun, Chen Changhe, et al. Mesh investigation about crossflow diffusion of computational flow dynamics in tangential combustion flow field[J]. Proceedings of the CSEE, 2007, 27(5): 22-28. DOI:10.3321/j.issn:0258-8013.2007.05.005. (in Chinese)

备注/Memo

备注/Memo:
收稿日期: 2018-03-03.
作者简介: 刘燮(1992—),男,硕士生;钟文琪(联系人),男,博士,教授,博士生导师,wqzhong@seu.edu.cn.
基金项目: 国家重点研发计划资助项目(2017YFB0601802)、江苏省重点研发计划资助项目(BE2017159).
引用本文: 刘燮,钟文琪,李杰,等.超超临界锅炉燃烧配风优化的三维数值模拟[J].东南大学学报(自然科学版),2018,48(5):794-800. DOI:10.3969/j.issn.1001-0505.2018.05.003.
更新日期/Last Update: 2018-09-20