缝式低NOx燃烧器结构的优化模拟

doi:10.11949/j.issn.0438-1157.20170934

化工学报 ›› 2018, Vol. 69 ›› Issue (4): 1723-1730.DOI: 10.11949/j.issn.0438-1157.20170934

缝式低NO_x燃烧器结构的优化模拟

刘慧¹, 张林², 杨晓晰³, 李东刚³

1. 东北大学冶金学院新能源科学与工程系, 辽宁沈阳 110819;
2. 西北工业大学动力与能源学院, 陕西西安 710072;
3. 东北大学冶金学院能动系, 辽宁沈阳 110819

收稿日期:2017-07-21 修回日期:2017-11-29 出版日期:2018-04-05 发布日期:2018-04-05
通讯作者: 刘慧
基金资助:
国家自然科学基金项目（51606031）；中央高校基本科研业务专项资金（N162504007）。

Structure optimization simulation of slit burner with low NO_x

LIU Hui¹, ZHANG Lin², YANG Xiaoxi³, LI Donggang³

1. New Energy Science and Engineering Department, School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China;
2. School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China;
3. Energy and Power Department, School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

Received:2017-07-21 Revised:2017-11-29 Online:2018-04-05 Published:2018-04-05
Supported by:
supported by the National Natural Science Foundation of China (51606031) and the Fundamental Research Funds for the Central Universities (N162504007).

摘要/Abstract

摘要：

天然气作为燃料具有效率高、污染物排放少等特点，但其燃烧时易产生局部高温，同时生成NO_x。因此天然气燃烧器的优化设计，对于天然气的清洁高效利用具有非常重要的作用。针对现有新型缝式低NO_x燃烧器进行结构改进，对改进后的结构进行模拟分析和实验验证，结果表明：在天然气管道上斜开圆孔，在降低NO_x排放方面有一定的效果，温度分布均匀性也得到了保证；当开孔方向与切缝方向一致时，高温区有所减小，烟气出口NO_x平均浓度降幅较大，且随着开孔角度的增大，烟气出口NO_x平均浓度逐渐减小；细缝左侧加挡板时烟气NO_x平均浓度降低，且随着挡板角度增加，烟气出口NO_x平均浓度先降低后增加，细缝左侧加30°挡板是最佳结构。与切缝方向一致时开孔50°是最佳结构。

关键词: 优化设计, 天然气, 低NO_x排放, 数值模拟, 燃烧

Abstract:

Natural gas has the characteristics of high heat value, high efficiency, low cost and low emission when used as fuel. However, when natural gas is burned, the local high temperature region can easily appear, and NO_x is generated. Therefore, the optimized design of natural gas burner has a very important role for cleanly and effectively use of natural gas. The structure of the existing new type of slit burner with low NO_x is optimized. There are two ways to improve the structure:the oblique air holes are opened on natural gas pipeline, the diversion baffles are added next to the small slit. The software Fluent is used for numerical simulation, and the experiment on the optimized burner is carried out. The simulation results are well verified by the data measured in the experiment. The results on the optimized structure are obtained as following:round holes are oblique opened on the natural gas pipeline, compared with the original burner, the temperature distribution is more uniform and NO_x emission is reduced. Round opening at the same direction with slit is better. When round holes are opened the same direction with slit in the natural gas pipeline, the average concentration of NO_x in the flue gas outlet dropped a lot, and the average concentration of NO_x decreases gradually with the increase of the opening angle. The effect of diversion baffles added on the right side of slits is not as good as the original structure. When the diversion baffles are added on the left side of the slits, the average NO_x emissions in the flue gas outlet is reduced, and the NO_x emissions decreases first and then increases with the increase of the angle of the flap. Holes at the same direction with slit angle of 50° on natural gas pipeline are the best choice in all cases.

Key words: optimal design, nature gas, low NO_x emission, numerical simulation, combustion

中图分类号:

TK16

刘慧, 张林, 杨晓晰, 李东刚. 缝式低NO_x燃烧器结构的优化模拟[J]. 化工学报, 2018, 69(4): 1723-1730.

LIU Hui, ZHANG Lin, YANG Xiaoxi, LI Donggang. Structure optimization simulation of slit burner with low NO_x[J]. CIESC Journal, 2018, 69(4): 1723-1730.

参考文献 30

[1]	HANSEN J, SATO M, RUEDY R, et al. Global temperature change[J]. Proceedings of the National Academy of Sciences, 2006, 103(39):14288-14293.
[2]	天工. "十三五"天然气将成为我国能源转型的重要抓手[J]. 天然气工业, 2017, 37(4):149. TIAN G. Natural gas will be an important part of China's energy transformation in 13th five-year plan[J]. Natural Gas Industry, 2017, 37(4):149.
[3]	国家统计局. 中国统计年鉴[M]. 北京:中国统计出版社, 2016:102-103. National Bureau of Statistics. China Statistical Yearbook[M]. Beijing:China Statistics Press, 2016:102-103.
[4]	胡元, 罗永浩, 周力行, 等. 外二次旋流风对旋流煤粉燃烧及NO生成的影响[J]. 化工学报, 2010, 61(9):2437-2441. HU L Y, LUO Y H, ZHOU L X, et al. Effect of outer secondary air on swirling pulverized-coal combustion and NO formation[J]. CIESC Journal, 2010, 61(9):2437-2441.
[5]	TI S, CHEN Z, KUANG M, et al. Numerical simulation of the combustion characteristics and NOx emission of a swirl burner:influence of the structure of the burner outlet[J]. Applied Thermal Engineering, 2016, 104:565-576.
[6]	HOU S S, LEE C Y, LIN T H. Efficiency and emissions of a new domestic gas burner with a swirling flame[J]. Energy Conversion and Management, 2007, 48(5):1401-1410.
[7]	SURJOSATYO A, PRIAMBODHO Y D, KWOK C K. Investigation of gas swirl burner characteristic on biomass gasification system using combustion unit equipment (CUE)[J]. Journal Mekanikal, 2011, 33(12):15-31.
[8]	LEE C Y, BAEK S W. Effects of hybrid reburning/SNCR strategy on NOx/CO reduction and thermal characteristics in oxygen-enriched LPG flame[J]. Combustion Science and Technology, 2007, 179(8):1649-1666.
[9]	AUDAI H A, JAMAL N, DAVID D. CFD modelling of air-fired and oxy-fuel combustion in a large-scale furnace at Loy Yang A brown coal power station[J]. Fuel, 2012, 102:646-665.
[10]	刘皓, 任瑞琪, 黄永俊, 等. 富氧燃烧系统中NO的还原及其排放[J]. 化工学报, 2011, 62(2):495-501. LIU H, REN R Q, HUANG Y J, et al. Reduction and emission of NO in oxy-fuel system[J]. CIESC Journal, 2011, 62(2):495-501.
[11]	YAMAMOTO T, SHIMODAIRA K, KROSAWA Y, et al. Investigations of a staged fuel nozzle for aero-engines by multi-sector combustor test[R]. ASME Paper GT2010-23206. 2010:961-973.
[12]	BAI W, LI H, DENG L, et al. Air-staged combustion characteristics of pulverized coal under high temperature and strong reducing atmosphere conditions[J]. Energy & Fuels, 2014, 28(3):1820-1828.
[13]	KIM H Y, BAEK S W. Experimental study of fuel-lean reburn system For NOx reduction and CO emission in oxygen-enhanced combustion[J]. International Journal of Energy Research, 2011, 35(8):710-720.
[14]	SHIGERU T K S, TAKESHI Y, MITSUMASA M, et al. Experimental and numerical investigation of thermo-acoustic instability in a liquid-fuel aero-engine combustor at elevated pressure:validity of large-eddy simulation of spray combustion[J]. Combustion and Flame, 2015, 162(6):2621-2637.
[15]	AKKERMAN V, LAW C K. Coupling of harmonic flow oscillations to combustion instability in premixed segments of triple flames[J]. Combustion & Flame, 2016, 172:342-348.
[16]	CAO S, ZOU C, HAN Q, et al. Numerical and experimental studies of NO formation mechanisms under methane moderate or intense low-oxygen dilution(MILD) combustion without heated air[J]. Energy & Fuels, 2015, 29(3):1987-1996.
[17]	MARDANI A, TABEJAMAAT S, HASSANPOUR S. Numerical study of CO and CO2 formation in CH4/H2 blended flame under MILD condition[J]. Combustion and Flame, 2013, 160(9):1639-1649.
[18]	LI P, DALLY B B, MI J, et al. MILD oxy-combustion of gaseous fuels in a laboratory-scale furnace[J]. Combustion and Flame, 2013, 160(5):933-946.
[19]	COGHE A, SOLERO G, SCRIBANO G. Recirculation phenomena in a natural gas swirl combustor[J]. Experimental Thermal and Fluid Science, 2004, 28(7):709-714.
[20]	MORITZ S, CHRISTIAN O P, KILIAN O. Advanced identification of coherent structures in swirl-stabilized combustors[J]. Journal of Engineering for Gas Turbines and Power-Transactions of the ASME, 2016, 139(2):021503.
[21]	RUKES L, SIEBER M, PASCHEREIT C O, et al. Effect of initial vortex core size on the coherent structures in the swirling jet near field[J]. Exp. Fluids, 2015, 56(10):197.
[22]	MAN Y K. Effect of swirl on gas-fired combustion behavior in a 3-D rectangular combustion chamber[J]. World Academy of Science Engineering & Technology, 2012, 6(4):797-802.
[23]	OBERLEITHNER K, SCHIMEK S, PASCHEREIT C O. Shear flow instabilities in swirl-stabilized combustors and their impact on the amplitude dependent flame response:a linear stability analysis[J]. Combust. Flame, 2015, 162(1):86-99.
[24]	REICHEL T G, TERHAAR S, PASCHEREIT O. Increasing flashback resistance in lean premixed swirl-stabilized hydrogen combustion by axial air injection[J]. ASME J. Eng. Gas Turbines Power, 2015, 137(7):071503.
[25]	KWARK J H, JEONG Y K, JEON C H, et al. Effect of swirl intensity on the flow and combustion of a turbulent non-premixed flat flame[J]. Flow Turbulence and Combustion, 2004, 73(3/4):231-257.
[26]	COGHE A, SOLERO G, SCRIBANO G. Recirculation phenomena in a natural gas swirl combustor[J]. Experimental Thermal and Fluid Science, 2004, 28(7):709-714.
[27]	ILBAS M, KARYEYEN S, YILMAZ I. Effect of swirl number on combustion characteristics of hydrogen-containing fuels in a combustor[J]. International Journal of Hydrogen Energy, 2016, 41(17):7185-7191.
[28]	KHANAFER K, AITHAL S M. Fluid-dynamic and NOx computation in swirl burners[J]. International Journal of Heat and Mass Transfer, 2011, 54(23/24):5030-5038.
[29]	COZZI F, COGHE A. Effect of air staging on a coaxial swirled natural gas flame[J]. Experimental Thermal & Fluid Science, 2012, 43(11):32-39.
[30]	MI J, LI P, ZHENG C. Numerical simulation of flameless premixed combustion with an annular nozzle in a recuperative furnace[J]. Chinese Journal of Chemical Engineering, 2010, 18(1):10-17.

缝式低NO_x燃烧器结构的优化模拟

Structure optimization simulation of slit burner with low NO_x

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献 30

相关文章 15

编辑推荐

Metrics

本文评价

[1]	叶展羽, 山訸, 徐震原. 用于太阳能蒸发的折纸式蒸发器性能仿真[J]. 化工学报, 2023, 74(S1): 132-140.
[2]	张义飞, 刘舫辰, 张双星, 杜文静. 超临界二氧化碳用印刷电路板式换热器性能分析[J]. 化工学报, 2023, 74(S1): 183-190.
[3]	王志国, 薛孟, 董芋双, 张田震, 秦晓凯, 韩强. 基于裂隙粗糙性表征方法的地热岩体热流耦合数值模拟与分析[J]. 化工学报, 2023, 74(S1): 223-234.
[4]	宋嘉豪, 王文. 斯特林发动机与高温热管耦合运行特性研究[J]. 化工学报, 2023, 74(S1): 287-294.
[5]	张思雨, 殷勇高, 贾鹏琦, 叶威. 双U型地埋管群跨季节蓄热特性研究[J]. 化工学报, 2023, 74(S1): 295-301.
[6]	吴曦, 区祖迪, 张鑫杰, 徐士鸣, 朱晓静. HFO-1243zf爆燃特性实验研究[J]. 化工学报, 2023, 74(S1): 346-352.
[7]	何松, 刘乔迈, 谢广烁, 王斯民, 肖娟. 高浓度水煤浆管道气膜减阻两相流模拟及代理辅助优化[J]. 化工学报, 2023, 74(9): 3766-3774.
[8]	陈哲文, 魏俊杰, 张玉明. 超临界水煤气化耦合SOFC发电系统集成及其能量转化机制[J]. 化工学报, 2023, 74(9): 3888-3902.
[9]	齐聪, 丁子, 余杰, 汤茂清, 梁林. 基于选择吸收纳米薄膜的太阳能温差发电特性研究[J]. 化工学报, 2023, 74(9): 3921-3930.
[10]	韩晨, 司徒友珉, 朱斌, 许建良, 郭晓镭, 刘海峰. 协同处理废液的多喷嘴粉煤气化炉内反应流动研究[J]. 化工学报, 2023, 74(8): 3266-3278.
[11]	邢雷, 苗春雨, 蒋明虎, 赵立新, 李新亚. 井下微型气液旋流分离器优化设计与性能分析[J]. 化工学报, 2023, 74(8): 3394-3406.
[12]	程小松, 殷勇高, 车春文. 不同工质在溶液除湿真空再生系统中的性能对比[J]. 化工学报, 2023, 74(8): 3494-3501.
[13]	刘文竹, 云和明, 王宝雪, 胡明哲, 仲崇龙. 基于场协同和耗散的微通道拓扑优化研究[J]. 化工学报, 2023, 74(8): 3329-3341.
[14]	张瑞航, 曹潘, 杨锋, 李昆, 肖朋, 邓春, 刘蓓, 孙长宇, 陈光进. ZIF-8纳米流体天然气乙烷回收工艺的产品纯度关键影响因素分析[J]. 化工学报, 2023, 74(8): 3386-3393.
[15]	洪瑞, 袁宝强, 杜文静. 垂直上升管内超临界二氧化碳传热恶化机理分析[J]. 化工学报, 2023, 74(8): 3309-3319.

缝式低NOx燃烧器结构的优化模拟

Structure optimization simulation of slit burner with low NOx

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献 30

相关文章 15

编辑推荐

Metrics

本文评价

缝式低NO_x燃烧器结构的优化模拟

Structure optimization simulation of slit burner with low NO_x