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

doi:10.11949/j.issn.0438-1157.20141829

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

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

收稿日期:2014-12-11 修回日期:2015-04-02 出版日期:2015-07-05 发布日期:2015-07-05
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)。

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).

摘要/Abstract

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

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

中图分类号:

TK224.1

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.

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.

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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

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

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