Numerical simulation on effect of burner tilting up angle on reheat steam temperature deviation for tangentially fired pulverized-coal boiler

doi:10.11949/j.issn.0438-1157.20141829

CIESC Journal ›› 2015, Vol. 66 ›› Issue (7): 2702-2708.DOI: 10.11949/j.issn.0438-1157.20141829

Previous Articles Next Articles

Numerical simulation on effect of burner tilting up angle on reheat steam temperature deviation for tangentially fired pulverized-coal boiler

TIAN Dengfeng¹, FANG Qingyan¹, TAN Peng¹, ZHANG Cheng¹, CHEN Gang¹, ZHONG Lijin², ZHANG Dianping², WANG Guoqiang²

1 State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China;
2 Zhuhai Power Plant, Zhuhai 519000, Guangdong, China

Received:2014-12-11 Revised:2015-04-02 Online:2015-07-05 Published:2015-07-05
Supported by:
supported by the Project on the Integration of Industry, Education, and Research of Guangdong Province (2012B091100173) and the Young Scientists Fund of Huazhong University of Science and Technology (HUST) (2014QN185).

燃烧器上摆角度对四角切圆锅炉再热蒸汽温度偏差影响的数值模拟

田登峰¹, 方庆艳¹, 谭鹏¹, 张成¹, 陈刚¹, 钟礼今², 张殿平², 王国强²

1 华中科技大学煤燃烧国家重点实验室, 湖北武汉 430074;
2 珠海发电厂, 广东珠海 519000

通讯作者: 方庆艳
基金资助:
广东省教育部产学研结合项目(2012B091100173);华中科技大学校青年科学基金项目(2014QN185)。

Abstract

Abstract:

The burner tilting up and the bias setting of AA tilting up angle was employed in order to reduce the temperature deviation of flue gas and reheat steam. The combustion processes in a 700 MW tangentially fired boiler with different burner tilting up angles were numerically simulated. The simulated results were fitted in with the measured data well. For greater burner tilting up angle, the swirling momentum moment in the furnace and the residual swirling momentum moment in the entrance of platen zone were reduced, while the flue gas deviation in the horizontal flue gas pass was lower. The bias setting of AA burner tilting up angle can reduce the flue gas residual swirling momentum moment of the entrance of platen zone considerably and lower the deviation of the flue gas temperature and velocity. The combustion tests showed that as an effective measures to reduce the temperature deviation of flue gas and reheat steam of this boiler, the burner tilting up for 11° and the bias setting of AA tilting up angle for 10° can reduce the temperature deviation of reheat steam from 20℃ to about 4℃.

Key words: tangentially fired boiler, burner tilting up angle, flue gas deviation, bias setting

摘要：

采用燃烧器上摆和附加风上摆角度偏差设置的方法来降低锅炉烟温偏差和再热蒸汽温度偏差。对一台700 MW四角切圆燃烧锅炉不同燃烧器上摆角度条件下的炉内燃烧过程进行了数值模拟,模拟结果与试验值符合较好。燃烧器上摆角度增加,炉内气流的旋转动量矩和屏区入口的残余旋转动量矩减小,水平烟道内烟气速度和温度偏差降低。附加风上摆角度的偏差设置可降低屏区入口的残余旋转动量矩,进而减小烟气速度和温度偏差。燃烧试验表明,燃烧器上摆11°和附加风上摆角度的偏差设置10°可将再热蒸汽温度偏差由20℃左右降低至4℃以下,是一种有效降低烟气和再热蒸汽温度偏差的手段。

关键词: 四角切圆燃烧锅炉, 燃烧器摆角, 烟气偏差, 偏差设置

CLC Number:

TK224.1

TIAN Dengfeng, FANG Qingyan, TAN Peng, ZHANG Cheng, CHEN Gang, ZHONG Lijin, ZHANG Dianping, WANG Guoqiang. Numerical simulation on effect of burner tilting up angle on reheat steam temperature deviation for tangentially fired pulverized-coal boiler[J]. CIESC Journal, 2015, 66(7): 2702-2708.

田登峰, 方庆艳, 谭鹏, 张成, 陈刚, 钟礼今, 张殿平, 王国强. 燃烧器上摆角度对四角切圆锅炉再热蒸汽温度偏差影响的数值模拟[J]. 化工学报, 2015, 66(7): 2702-2708.

References 21

[1]	Zhu Zhenjin (朱珍锦), Zhang Changlu (张长鲁), Fang Zhicheng (方志成). Cold model tests of a new technique on eliminating residual rotation at furnace outlet of tangential firing system [J]. Proceeding of the CSEE (中国电机工程学报), 2002, 22 (2): 59-63.
[2]	Zhang Ze (张泽), Xu Xuchang (徐旭常). Closed streamline numerical simulation on two-phase flow field of upper furnace and superheater platen zones in tangential-firing boiler [J]. Journal of Combustion Science and Technology (燃烧科学与技术), 2002, 8 (2): 97-102.
[3]	Diao Yongfa (刁永发), He Boxu (何伯旭), Xu Jinyuan (许晋源), et al. Three-dimensional motion of vortices in the platen zone of tangentially fired furnace [J]. Proceeding of the CSEE (中国电机工程学报), 2003, 23 (5): 170-175.
[4]	Li Wenyan (李文彦), Kang Zhizhong (康志忠), Song Zhiping (宋之平), et al. Research on gas temperature and velocity deviation and control technology of tangentially-fired boiler of 600 MW unit [J]. Proceeding of the CSEE (中国电机工程学报), 2003, 23 (2): 163-167.
[5]	Yin C, Rosendahl L, Condra T J. Further study of the gas temperature deviation in large-scale tangentially coal-fired boilers [J]. Fuel, 2002, 81: 1127-1137.
[6]	Zhou Junhu (周俊虎), Song Guoliang (宋国良), Chen Yinbiao (陈寅彪), et al. Test and research of flue gas temperature deviation at the furnace exit of a 2008 t/h boiler with tangential firing [J]. Thermal Power Generation (热力发电), 2003, (6): 31-35.
[7]	Zhou Y, Xu T, Hui S, et al. Experimental and numerical study on the flow fields in upper furnace for large scale tangentially fired boilers [J]. Applied Thermal Engineering, 2009, 29: 732-739.
[8]	Chen Gang (陈刚), Zheng Chuguang (郑楚光). Relation between the volume heat load of upper furnace and the fuel gas temperature deviation for tangential firing boiler [J]. Proceeding of the CSEE (中国电机工程学报), 2002, 22 (11): 146-148.
[9]	Xu L, Khan J, Chen Z. Thermal load deviation model for superheater and reheater of a utility boiler [J]. Applied Thermal Engineering, 2000, 20: 545-588.
[10]	Li Yanpeng (李彦鹏), Zhang Qiang (张强), Gu Fan (顾璠), et al. Numerical study on the effect of reverse swirl of secondary air on flue gas imbalance in large tangentially fired boiler [J]. Proceeding of the CSEE (中国电机工程学报), 2001, 21 (9): 33-37.
[11]	Xu M, Yuan J, Ding S, Cao H. Simulation of gas temperature deviation in large-scale tangential coal fired utility boilers [J]. Computer Methods in Applied Mechanics and Engineering, 1998, 155: 369-380.
[12]	Park H Y. Baek S H, Kim Y J, et al. Numerical and experimental investigation on the gas temperature deviation in a large scale, advanced low NOx, tangentially fired pulverized coal boiler [J]. Fuel, 2013, 104: 641-646.
[13]	Shen Chunmei (申春梅). Numerical simulation of pulverized coal combustion process in a 1000 MW dual circle tangential firing single chamber boiler [D]. Harbin: Harbin Institution of Technology, 2006.
[14]	Launder B E, Spalding D B. Mathematical Models of Turbulence [M]. New York: Academic Press, 1972.
[15]	Smoot L D, Smith P J. Coal Combustion and Gasification [M]. New York: Plenum Press, 1989.
[16]	Launder B E, Spalding D B. The numerical computation of turbulent flows [J]. Computer Methods in Applied Mechanics and Engineering, 1974, 3 (2): 269-289.
[17]	de Soete G G. Overall reaction rates of NO and N2 formation from fuel nitrogen //15th Symposium (international) on Combustion [C]. Pittsburgh, PA, 1975: 1093-1102.
[18]	Hill S C, Smoot L D. Modeling of nitrogen oxides formation and destruction in combustion systems [J]. Progress in Energy and Combustion Science, 2000, 26: 417-458.
[19]	Wang Zhigang (王志刚), Zhou Yuqun (禚玉群), Chen Changhe (陈昌和), et al. Mesh investigation about crossflow diffusion of computational flow dynamics in tangential combustion flow field [J]. Proceeding of the CSEE (中国电机工程学报), 2007, 27 (5): 22-28.
[20]	Norbert M. Computational modeling of a utility boiler tangentially-fired furnace retrofitted with swirl burners [J]. Fuel Processing Technology, 2010, 91: 1601-1608.
[21]	Patankar S V. Numerical Heat Transfer and Fluid Flow [M]. New York: McGraw-Hill, 1980.

Numerical simulation on effect of burner tilting up angle on reheat steam temperature deviation for tangentially fired pulverized-coal boiler

燃烧器上摆角度对四角切圆锅炉再热蒸汽温度偏差影响的数值模拟

PDF (PC)

Knowledge

Cited

Abstract

Cite this article

share this article

References 21

Related Articles 2

Recommended Articles

Metrics

Comments

[1]	ZHENG Youqu, FAN Jianren, MA Yinliang, SUN Ping, CEN Kefa. Computational Modeling of Tangentially Fired Boiler (Ⅱ) NO_x Emissions [J]. , 2000, 8(3): 247-250.
[2]	ZHA Xudong, FAN Jianren, QIAN Ligeng, SUN Ping, CEN Kefa. Computational Modeling of Tangentially Fired Boiler (I) Models, Flow Field and Temperature Profiles [J]. , 2000, 2(2): 128-133.