1036MW超超临界燃煤机组锅炉等离子点火系统的设计及应用
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摘要
针对国内某电厂1 036 MW超超临界燃煤机组4号锅炉,设计了含低NOx等离子煤粉燃烧器的等离子点火系统,实现了等离子煤粉燃烧器的流场和煤粉浓度分布可调。Fluent模拟计算及实际应用效果表明:当等离子煤粉燃烧器为点火燃烧器时,等离子点火系统运行稳定,煤粉燃尽率高,锅炉升温、升压速率满足运行规程要求;当等离子煤粉燃烧器为主燃烧器时,很好地还原了锅炉原设计煤粉燃烧器的流场和煤粉浓度分布,保证了锅炉的性能达到设计要求。
Described were the principles for the plasma ignition technology. For the Boiler No. 4 of a 1036 MW ultra-supercritical coal-fired unit in a domestic power plant,a plasma ignition system equipped with low NOxplasma pulverized coal burners was designed. On this basis,the authors made it realized that the flow field formed by using plasma pulverized coal burners and the pulverized coal concentration distribution is controllable. The simulation calculation results by using the software Fluent and the practical operation effectiveness show that when the plasma pulverized coal burners serve as the ignition ones,the plasma ignition system can maintain a stable operation and has a high burn-out rate of the pulverized coal,the temperature and pressure rise speed of the boiler meeting the requirements stipulated in the operation specifications. When the plasma pulverized coal burners serve as the primary ones,the flow field and the pulverized coal concentration distribution originally designed for the boiler can be restored very well,thus guaranteeing that the performance of the boiler can meet the design requirement.
Described were the principles for the plasma ignition technology. For the Boiler No. 4 of a 1036 MW ultra-supercritical coal-fired unit in a domestic power plant,a plasma ignition system equipped with low NOxplasma pulverized coal burners was designed. On this basis,the authors made it realized that the flow field formed by using plasma pulverized coal burners and the pulverized coal concentration distribution is controllable. The simulation calculation results by using the software Fluent and the practical operation effectiveness show that when the plasma pulverized coal burners serve as the ignition ones,the plasma ignition system can maintain a stable operation and has a high burn-out rate of the pulverized coal,the temperature and pressure rise speed of the boiler meeting the requirements stipulated in the operation specifications. When the plasma pulverized coal burners serve as the primary ones,the flow field and the pulverized coal concentration distribution originally designed for the boiler can be restored very well,thus guaranteeing that the performance of the boiler can meet the design requirement.
引文
[1]於晓博,姜宇.大型火电锅炉点火方式选择研究[J].神华科技,2011(2):58-61.YU Xiao-bo,JIANG Yu.The selection and research on ignition measures of thermal power boiler of large scale[J].SHEN HUA SCIENCE AND TECHNOLOGY,2011(2):58-61.
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[4]刘一思,曹厚继.等离子点火技术在电厂中的应用[J].电源技术应用,2013(8):366-394.LIU Yi-si,CAO Hou-ji.Application of the plasma ignition technology in power plants[J].Power Supply Technoloyies and Applications,2013(8):366-394.
[5]张人超.等离子点火技术与微油点火技术在1 000 MW机组应用的技术性和经济性比较[J].广东电力,2013(3):113-117.ZHANG Ren-chao.Comparison of application of technicality and economy of plasma ignition technology and micro-oil ignition technology in 1 000 MW unit[J].Guangdong Electric Power,2013(3):113-117.
[2]王小龙,陈宜阳.1 000 MW超超临界锅炉新型等离子点火系统运行优化[J].华电技术,2012(11):34-38.WANG Xiaolong,CHEN Yiyang.Operation optimization of new plasma ignition system of 1 000 MW ultra supercritical boiler[J].Huadian Technology,2012(11):34-38.
[3]节能减排“十二五”规划[R],北京:2012.The 12th five-year plan for energy conservation and emission reduction[R].Beijing:2012.
[4]刘一思,曹厚继.等离子点火技术在电厂中的应用[J].电源技术应用,2013(8):366-394.LIU Yi-si,CAO Hou-ji.Application of the plasma ignition technology in power plants[J].Power Supply Technoloyies and Applications,2013(8):366-394.
[5]张人超.等离子点火技术与微油点火技术在1 000 MW机组应用的技术性和经济性比较[J].广东电力,2013(3):113-117.ZHANG Ren-chao.Comparison of application of technicality and economy of plasma ignition technology and micro-oil ignition technology in 1 000 MW unit[J].Guangdong Electric Power,2013(3):113-117.