330MW循环流化床锅炉的燃烧优化试验研究
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摘要
为解决某循环流化床锅炉效率低、分离器立管温度高、运行参数不合理等问题,在300 MW和250 MW负荷下,分别进行了变氧含量工况调整试验,在最佳氧含量的基础上,进行了变一次风率、变床压调整试验,优化了氧含量、一次风率、床压等关键参数。试验结果显示:300 MW负荷下,氧含量3.3%、一次风率38%、床压8.2 k Pa锅炉效率达到91.36%;250 MW负荷下,氧含量4.75%、一次风率40%、床压7.7 k Pa锅炉效率达到90.22%。通过增加立管润滑风系统、播煤风风源移位等技术改造措施解决了立管温度高、二次风裕量不足的问题。适当降低床压、一次风率运行,可以在节能降耗的同时提高锅炉效率,研究结果可应用于300 MW等级CFB锅炉的燃烧优化调整。
A circulating fluidized bed(CFB) boiler had the problems of lower efficiency,higher temperature of standpipes and unreasonable running parameters.Under the load of 300 MW and 250 MW,experiment was conducted to optimize the oxygen,then optimize primary air rate and bed pressure in the best oxygen range respectively. The results show that,boiler efficiency reaches 91. 36% under the load of 300 MW with the oxygen of 3. 3%,the primary air rate of 38% and the bed pressure of 8. 2 k Pa.The boiler efficiency achieves 90. 22% under the load of 250 MW with the oxygen of 4. 75%,the primary air rate of 40% and the bed pressure of 7. 7 k Pa.A lubricating air system is suggested to build for the high temperature of standpipes,and the source of coal distributing air is suggested to be removed for the shortage of secondary air.The experimental results indicate that appropriate reduction of bed pressure and primary air rate can reduce energy consumption and increase boiler efficiency.The results can be applied to the optimal operation adjustment of 300 MW grade CFB boilers.
A circulating fluidized bed(CFB) boiler had the problems of lower efficiency,higher temperature of standpipes and unreasonable running parameters.Under the load of 300 MW and 250 MW,experiment was conducted to optimize the oxygen,then optimize primary air rate and bed pressure in the best oxygen range respectively. The results show that,boiler efficiency reaches 91. 36% under the load of 300 MW with the oxygen of 3. 3%,the primary air rate of 38% and the bed pressure of 8. 2 k Pa.The boiler efficiency achieves 90. 22% under the load of 250 MW with the oxygen of 4. 75%,the primary air rate of 40% and the bed pressure of 7. 7 k Pa.A lubricating air system is suggested to build for the high temperature of standpipes,and the source of coal distributing air is suggested to be removed for the shortage of secondary air.The experimental results indicate that appropriate reduction of bed pressure and primary air rate can reduce energy consumption and increase boiler efficiency.The results can be applied to the optimal operation adjustment of 300 MW grade CFB boilers.
引文
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[14]王智微,陈文跃,倪蛟,等.循环流化床锅炉回料阀风量优化调整试验[J].热力发电,2013,42(1):97-99.WANG Zhiwei,CHEN Wenyue,NI Jiao,et al.Adjustment of loop seal in CFB boilers[J].Thermal Power Generation,2013,42(1):97-99.
[15]常乐,李伟,张拓.国产330 MW循环流化床锅炉分离器立管高料位压力变正值问题分析及处理措施[J].锅炉制造,2010(2):36-38.CHANG Le,LI Wei,ZHANG Tuo.Analysis and treatment measures of domestic 330 MW CFB boiler separator riser high-level pressure positive change[J].Boiler Manufacturing,2010(2):36-38.
[2]孙献斌,胡昌华,李星华,等.600 MW超临界循环流化床锅炉外置床壁温特性分析[J].电力建设,2014,35(4):6-9.SUN Xianbin,HU Changhua,LI Xinghua,et al.Tube wall temperature characteristic of external heat exchanger in 600 MW supercritical CFB boiler[J].Electric Power Construction,2014,35(4):6-9.
[3]张缦,吴海波,孙运凯,等.大型循环流化床锅炉外置换热器运行特性分析[J].中国电机工程学报,2012,34(12):42-48.ZHANG Man,WU Haibo,SUN Yunkai,et al.Operation characteristics of fluidized bed heat exchanger of large-scale circulating fluidized bed boiler[J].Proceedings of the CSEE,2012,34(12):42-48.
[4]孟桂祥,王伟,马化杰,等.某330 MW锅炉燃烧调整实验及优化运行分析[J].电站系统工程,2014,30(6):25-28.MENG Guixiang,WANG Wei,MA Huajie,et al.Combustion adjusted experiments and optimized operating analysis of the 330 MW boiler[J].Power System Engineering,2014,30(6):25-28.
[5]索疆舜,崔志刚,马素霞.CFB锅炉飞灰含碳量影响因素分析[J].热力发电,2016,45(7):84-92.SUO Jiangshun,CUI Zhigang,MA Suxia.Influence factors of carbon content in fly ash in circulating fluidized bed boiler[J].Thermal Power Generation,2016,45(7):84-92.
[6]胡玉,吴海波.330 MW CFB锅炉燃烧调整与经济运行技术研究[J].电站系统工程,2016,32(5):23-27.HU Yu,WU Haibo.Study of 330 MW CFB boiler combustion adjustment and economic operation technology[J].Power System Engineering,2016,32(5):23-27.
[7]洪喜生.300 MW机组循环流化床锅炉低氧量燃烧优化调整试验分析[J].内蒙古电力技术,2016,34(2):56-58.HONG Xisheng.Optimization and adjustment of low oxygen content combustion in 300 MW CFB boiler[J].Inner Mongolia Electric Power,2016,34(2):56-58.
[8]钟犁,徐正泉,曹幸卫,等.300 MW机组循环流化床锅炉燃烧调整的试验研究[J].热力发电,2012,41(5):69-76.ZHONG Li,XU Zhengquan,CAO Xingwei,et al.Test study on combustion adjustment of one CFB boiler for 300 MW unit[J].Thermal Power Generation,2012,41(5):69-76.
[9]高继录,邹天舒,冷杰,等.1 000 MW超超临界锅炉燃烧调整的试验研究[J].动力工程学报,2012,32(10):741-746.GAO Jilu,ZOU Tianshu,LENG Jie,et al.Test study on combustion adjustment for 1 000 MW ultra supercritical boiler[J].Journal of Chinese Society of Power Engineering,2012,32(10):741-746.
[10]张敏.CFB锅炉燃烧优化调整试验方法研究与应用[J].热力发电,2009,38(9):63-69.ZHANG Min.Research and application of tuning test for optimizing CFB boiler combustion[J].Thermal Power Generation,2009,38(9):63-69.
[11]李克章.300 MW CFB锅炉外置式换热器的泄漏治理及运行优化[D].北京:华北电力大学,2016:33-35.
[12]杨磊,解雪涛,李战国.330 MW循环流化床锅炉燃烧初调整试验参数分析[J].电站系统工程,2012,28(6):25-28.YANG Lei,XIE Xuetao,LI Zhanguo.Analysis of 330 MW CFB unit combustion adjustment test parameter[J].Power System Engineering,2012,28(6):25-28.
[13]孙献斌.循环流化床锅炉浅床运行技术及大型化分析研究[J].洁净煤技术,2009,12(2):57-59.SUN Xianbin.Operating technology and analysis research of scaling-up in shallow bed of circulating fluidized bed boiler[J].Clean Coal Technology,2009,12(2):57-59.
[14]王智微,陈文跃,倪蛟,等.循环流化床锅炉回料阀风量优化调整试验[J].热力发电,2013,42(1):97-99.WANG Zhiwei,CHEN Wenyue,NI Jiao,et al.Adjustment of loop seal in CFB boilers[J].Thermal Power Generation,2013,42(1):97-99.
[15]常乐,李伟,张拓.国产330 MW循环流化床锅炉分离器立管高料位压力变正值问题分析及处理措施[J].锅炉制造,2010(2):36-38.CHANG Le,LI Wei,ZHANG Tuo.Analysis and treatment measures of domestic 330 MW CFB boiler separator riser high-level pressure positive change[J].Boiler Manufacturing,2010(2):36-38.