Numerical simulation of flue gas recirculation combined over-fired air combustion in glass melting furnace

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Abstract The use of flue gas recirculation combined with over-fired air combustion under the conditions of high temperature and low oxygen combustion (HTAC) technology in the glass melting furnace has an extremely significant effect on reducing NO_x emissions. In this paper, a mathematical model of flue gas recirculation combined with over-fired air combustion is established based on numerical calculation methods, and the reliability of the model is verified by comparing actual operating data with simulation results. Research results show: (1) As the flue gas circulation rate increases, the temperature of furnace flame decreases, and the NO_x concentration at the outlet of the small furnace decreases; (2) The addition of burn-out air is beneficial to increase the heat flux of the flue gas to the molten glass; (3) The optimized operating parameters of flue gas recirculation combined with over-fire air nitrogen reduction combustion under the research conditions of this paper are: flue gas circulation rate 5%, over-fire air rate 20%. Compared with the basic operating conditions (circulation rate 0, over-fire air rate 0), when running under optimized parameters, the corresponding NO_x mass flow is 0.009 51 kg·s^-1, and the heat flux is 41.54 kW·s^-1. Compared with the basic operating conditions (circulation rate 0, over-fire air rate 0), the NO_x emission concentration is reduced by 60.73%, and the heat flux between flue gas and glass liquid is increased by 13%. Compared with the working condition of circulation rate 0 and over-combustion air rate 20%, the NO_x concentration drops by 49.4%, and the heat flux between flue gas and molten glass drops by 3.7%. The results of this study provide theoretical support for NO_x reduction in glass melting furnaces.

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	Articles by authors
	WU Wei
	XU Shunsheng
	HE Jiazhen
	PEI Fei
	RAN Weiling

Keywords： glass furnace flue gas circulation numerical simulation reduced nitrogen combustion over-fire air

Received 2021-09-10;

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WU Wei, XU Shunsheng, HE Jiazhen, PEI Fei, RAN Weiling.Numerical simulation of flue gas recirculation combined over-fired air combustion in glass melting furnace[J] Chemcial Industry and Engineering, 2022,V39(5): 97-108

[1] 王志敏,谢峻林,梅书霞,等.浮法玻璃熔窑火焰空间石油焦部分替代重油燃烧的数值模拟[J].过程工程学报, 2020, 20(6):737-744 WANG Zhimin, XIE Junlin, MEI Shuxia, et al. Numerical simulation of combustion process of petroleum coke partially substituting heavy oil in combustion space of float glass furnace[J]. The Chinese Journal of Process Engineering, 2020, 20(6):737-744(in Chinese)
[2] LING Z, ZHOU H, REN T. Effect of the flue gas recirculation supply location on the heavy oil combustion and NO_x emission characteristics within a pilot furnace fired by a swirl burner[J]. Energy, 2015, 91:110-116
[3] 陈国宁,王爱,黄宣宣,等.玻璃行业烟气综合治理技术的现状和发展[J].轻工科技, 2017, 33(11):93-94 CHEN Guoning, WANG Ai, HUANG Xuanxuan, et al. Current situation and development of comprehensive treatment technology of glass industry flue gas[J]. Light Industry Science and Technology, 2017, 33(11):93-94(in Chinese)
[4] 张嘉鸣,王子兵,郭珊,等.蓄热式加热炉烟气吹扫系统设计应用[J].洁净煤技术,2020,26(5):42-47 ZHANG Jiaming, WANG Zibing, GUO Shan, et al. Design and application of flue gas purging system for regenerative heating furnace[J]. Clean Coal Technology, 2020,26(5):42-47
[5] 胡升腾,傅维标,钟北京,等.液体燃料高温低氧燃烧的数值模拟研究[J].燃烧科学与技术, 2003, 9(3):229-233 HU Shengteng, FU Weibiao, ZHONG Beijing, et al. Study on the simulation of the HTLOAC of liquid fuel[J]. Journal of Combustion Science and Technology, 2003, 9(3):229-233(in Chinese)
[6] 孙超,胡菁菁,李茂,等.浅析高温空气燃烧(HTAC)技术:以及其在蓄热式加热炉上的应用[J].科技资讯, 2011, doi:10.16661/j.cnki.1672-3791.2011.31.115 SUN Chao, HU Jingjing, LI Mao, et al. Analysis of high temperature air combustion (HTAC) technology and its application in regenerative reheating furnace[J]. Science&Technology Information, 2011, doi:10.16661/j.cnki.1672-3791.2011.31.115(in Chinese)
[7] 陆燕宁,章洪涛,许岩韦,等.烟气再循环对生物质炉排炉燃烧影响的数值模拟[J].浙江大学学报(工学版), 2019, 53(10):1898-1906 LU Yanning, ZHANG Hongtao, XU Yanwei, et al. Numerical simulation of effects of flue gas recirculation on biomass combustion in grate boiler[J]. Journal of Zhejiang University (Engineering Science), 2019, 53(10):1898-1906(in Chinese)
[8] 程怀志,文雷,宋正昶. 350 MW煤粉锅炉低氮燃烧改造与参数优化设计[J].动力工程学报, 2015, 35(9):704-708 CHENG Huaizhi, WEN Lei, SONG Zhengchang. Retrofit on low-NO_x combustion of a 350 MW pulverized coal-fired boiler and the parameters optimization[J]. Journal of Chinese Society of Power Engineering, 2015, 35(9):704-708(in Chinese)
[9] TAMURA M, WATANABE S, KOMABA K, et al. Combustion behaviour of pulverised coal in high temperature air condition for utility boilers[J]. Applied Thermal Engineering, 2015, 75:445-450
[10] OH W, YU B, PARK T, et al. A fundamental study of hybrid combustion system applying exhaust gas recirculation[J]. Journal of Energy Engineering, 2016, 25(1):100-107
[11] GUO K, SHI W, WU D. Experiment research and simulation analysis of regenerative oxygen-enriched combustion technology[J]. Energy Procedia, 2015, 66:221-224
[12] WEBER R, GUPTA A K, MOCHIDA S. High temperature air combustion (HiTAC):How it all started for applications in industrial furnaces and future prospects[J]. Applied Energy, 2020, doi:10.1016/j.apenergy.2020.115551
[13] 曾强.烟气再循环对燃气非预混燃烧NO_x排放特性的影响[D].重庆:重庆大学, 2018 ZENG Qiang. Effect of flue gas recirculation on NO_x emissions characteristics of gas non-premixed combustion[D]. Chongqing:Chongqing University, 2018(in Chinese)
[14] 刘健.烟气再循环对生物质层燃特性及脱硝性能的影响[D].济南:山东大学, 2020 LIU Jian. The influence of flue gas recycling on biomass grate combustion and denitration[D]. Jinan:Shandong University, 2020(in Chinese)
[15] 梅书霞,李雪梅,谢峻林,等.燃油浮法玻璃熔窑高温低氧燃烧减排NO_x的数值模拟[J].硅酸盐通报, 2018, 37(9):2961-2966 MEI Shuxia, LI Xuemei, XIE Junlin, et al. Numerical simulation of reducing the NO_x emission in the combustion space of an oil fired float glass furnace utilizing high temperature air combustion (HTAC) technology[J]. Bulletin of the Chinese Ceramic Society, 2018, 37(9):2961-2966(in Chinese)
[16] LI L, HAN J, LIN H et al. Simulation of glass furnace with increased production by increasing fuel supply and introducing electric boosting[J].International Journal of Applied GlassScience,2020,11(1):170-184
[17] SCHAFFEL-MANCINI N, MANCINI M, SZLEK A, et al. Novel conceptual design of a supercritical pulverized coal boiler utilizing high temperature air combustion (HTAC) technology[J]. Energy, 2010, 35(7):2752-2760
[18] ZHANG H, YUE G, LU J, et al. Development of high temperature air combustion technology in pulverized fossil fuel fired boilers[J]. Proceedings of the Combustion Institute, 2007, 31(2):2779-2785
[19] 金明芳,何峰,谢峻林,等.优化玻璃熔窑底烧式喷枪仰角的数值模拟研究[J].武汉理工大学学报, 2013, 35(8):24-28 JIN Mingfang, HE Feng, XIE Junlin, et al. Numerical simulation on optimization of burners'elevation angle in bottom-fired glass furnace[J]. Journal of Wuhan University of Technology, 2013, 35(8):24-28(in Chinese)
[20] MEI S, XIE J, JIN M, et al. Numerical simulation in combustion space of an oil fired float glass furnace[C]//2008 Asia Simulation Conference-7th International Conference on System Simulation and Scientific Computing. Beijing:IEEE, 2008:1371-1374