不同种类煤粉燃烧NO_x排放特性试验研究
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摘要
为研究煤粉燃烧过程中NO_x的排放特性,在一维煤粉燃烧实验台上,对单煤及其混煤进行NO_x析出特性的燃烧试验研究,具体分析煤质特性、燃烧工况对NO_x排放特性的影响,在试验的基础上,对NO_x的排放规律进行理论探讨。试验结果表明:煤中的挥发分含量、含氮量、煤粉细度和过量空气系数对NO_x的排放浓度有较大的影响;煤中挥发分、含氮量含量高,NO_x排放浓度也高;在富燃情况下,煤粉越细,NO_x排放浓度就越小。对优化燃烧、控制NO_x排放有一定的指导意义。
The characteristics of NOx releasing for different pulverized coal in one dimensional furnace were studied.The effect of operating parameters,coal property on the characteristics of the NOx releasing was also discussed.On the basis of experimental research,the influence of these factors on the concentration of NOx was analyzed theoretically.Results on the basis of experimental research showed:the volatile and nitrogen content of coal,pulverized coal fitness,combustion temperature and extra air coefficient have a clear effect on NOx releasing concentration;The concentration of NOx has higher level with more volatile or nitrogen contained in the coal;Fine pulverized coal can also bring the concentration of NOx down based fuel-rich.It is useful for optimizing combustion and controlling NOx emission.
The characteristics of NOx releasing for different pulverized coal in one dimensional furnace were studied.The effect of operating parameters,coal property on the characteristics of the NOx releasing was also discussed.On the basis of experimental research,the influence of these factors on the concentration of NOx was analyzed theoretically.Results on the basis of experimental research showed:the volatile and nitrogen content of coal,pulverized coal fitness,combustion temperature and extra air coefficient have a clear effect on NOx releasing concentration;The concentration of NOx has higher level with more volatile or nitrogen contained in the coal;Fine pulverized coal can also bring the concentration of NOx down based fuel-rich.It is useful for optimizing combustion and controlling NOx emission.
引文
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[3]路春美,王永征.煤燃烧理论与技术[M].北京:地震出版社,2001.
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[10]郭永红,孙保民,刘彤,等.褐煤的超细粉再燃中NOx的生成与还原的数值模拟[J].中国电机工程学报,2005,25(8):96-98.Guo Yonghong,Sun Baomin,Liu Tong,et al.numerical simulat-ion of nox formation and deoxidization with micro-pulverized coal reburning technolo-gy for lignit[J].Proceedings of the CSEE,2005,25(8):96-98(in Chinese).
[11]姜秀民,杨海平,刘辉,等.粉煤颗粒粒度对燃烧特性影响热分析[J].中国电机工程学报,2002,22(12):142-145.Jiang Xiumin,Yang Haiping,Liu Hui,et al.Analysis of the effect of coal powder granularity on combustion characteristics by thermo-gravimetry[J].Proceedings of the CSEE,2002,22(12):142-145(in Chinese).
[12]姜秀民,李巨斌,邱健荣.超细化煤粉燃烧特性的研究[J].中国电机工程学报,2000,20(6):71-78.Jiang Xiumin,Li Jubin,Qiu Jianrong.Study on combustion on characteristic of micro-pulverized coal[J].Proceedings of the CSEE,2000,20(6):71-78(in Chinese).
[13]翁安心,周昊,张力,等.不同煤种混煤燃烧时NOx生成的试验研究[J].热能动力工程,2004,19(3):242-245.Wong Anxin,Zhou Hao,Zhang Li,et al.Experimental reaserch of the NOx generation and burnout characteristics during the combustion of blended coal[J].Journal of Engineering for Themal Energy and Power,2004,19(3):242-245(in Chinese).
[14]杨冬,王永征,路春美,等.煤粉燃烧实验装置的设计与制作[J].实验室研究与探索,2006,25(1):44-47.Yang Dong,Wang Yongzheng,Lu Chunmei,et al.Design and fabrication of experimental apparatus for pulverized-coal combustion[J].Laboratory Research and Exploration,2006,25(1):44-47(in Chinese).
[2]曾汉才.燃烧与污染[M].武汉:华中理工大学出版社,1992.
[3]路春美,王永征.煤燃烧理论与技术[M].北京:地震出版社,2001.
[4]李永华,李松庚,冯兆兴,等.褐煤及其混煤燃烧NOx生成的试验研究[J].中国电机工程学报,2001,21(8):34-36.Li Yonghua,Li Songgeng,Feng Zhaoxing,et al.Experimental study on the formation of NOx of brown and brown-blending coal combustion[J].Proceedings of the CESS,2001,21(8):34-36(in Chinese).
[5]刘汉涛,王永征,李英杰,等.一维火焰燃烧NOx、SOx排放规律试验研究[J].锅炉技术,2005,36(1):75-80.Liu Hantao,Wang Yongzheng,Li Yingjie,et al.Experimental studies on the rules of NOx and SOx emission from the pulverized coal combusting in the one dimensional boiler[J].Boiler Technology,2005,36(1):75-80(in Chinese).
[6]金晶,张忠孝,李瑞阳.煤粉燃烧炉膛沿程NOx释放规律的研究[J].中国电机工程学报,2006,26(1):35-39.Jin Jing,Zhang Zhongxiao,Li Ruiyang.Study on the NOx release rule along boiler dring pulverized coal combustion[J].Proceedings of the CSEE,2006,26(1):35-39(in Chinese).
[7]向军,邱纪华,熊友辉,等.锅炉氮氧化物排放特性试验研究[J].中国电机工程学报,2000,20(9):55-58.Xiang Jun,Qiu Jihua,Xiong Youhui,et al.Experimental study on the formation of NOx emission of coal combustion[J].Proceedings of the CESS,2000,20(9):55-58(in Chinese).
[8]方立军,高正阳,阎维平,等.低挥发分煤燃烧NOx排放特性的试验研究.中国电机工程学报,2003,23(8):211-214.Fang Lijun,Gao Zhengyang,Yan Weiping,et al.Experimental study on the characteristics of NOx emission of low Volatile coal combustion[J].Proceedings of the CESS,2003,23(8):211-214(in Chinese).
[9]程俊峰,曾汉才,熊蔚立,等.降低300MW贫煤锅炉NOx排放的试验研究[J].中国电机工程学报,2002,22(5):157-160.Cheng Junfeng,Zeng Hancai,Xiong Weili,et al.Research and test for reducing NOx emission of a300MW lean coal-fired boiler[J].Proceedings of the CSEE,2002,22(5):157-160(in Chinese).
[10]郭永红,孙保民,刘彤,等.褐煤的超细粉再燃中NOx的生成与还原的数值模拟[J].中国电机工程学报,2005,25(8):96-98.Guo Yonghong,Sun Baomin,Liu Tong,et al.numerical simulat-ion of nox formation and deoxidization with micro-pulverized coal reburning technolo-gy for lignit[J].Proceedings of the CSEE,2005,25(8):96-98(in Chinese).
[11]姜秀民,杨海平,刘辉,等.粉煤颗粒粒度对燃烧特性影响热分析[J].中国电机工程学报,2002,22(12):142-145.Jiang Xiumin,Yang Haiping,Liu Hui,et al.Analysis of the effect of coal powder granularity on combustion characteristics by thermo-gravimetry[J].Proceedings of the CSEE,2002,22(12):142-145(in Chinese).
[12]姜秀民,李巨斌,邱健荣.超细化煤粉燃烧特性的研究[J].中国电机工程学报,2000,20(6):71-78.Jiang Xiumin,Li Jubin,Qiu Jianrong.Study on combustion on characteristic of micro-pulverized coal[J].Proceedings of the CSEE,2000,20(6):71-78(in Chinese).
[13]翁安心,周昊,张力,等.不同煤种混煤燃烧时NOx生成的试验研究[J].热能动力工程,2004,19(3):242-245.Wong Anxin,Zhou Hao,Zhang Li,et al.Experimental reaserch of the NOx generation and burnout characteristics during the combustion of blended coal[J].Journal of Engineering for Themal Energy and Power,2004,19(3):242-245(in Chinese).
[14]杨冬,王永征,路春美,等.煤粉燃烧实验装置的设计与制作[J].实验室研究与探索,2006,25(1):44-47.Yang Dong,Wang Yongzheng,Lu Chunmei,et al.Design and fabrication of experimental apparatus for pulverized-coal combustion[J].Laboratory Research and Exploration,2006,25(1):44-47(in Chinese).
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