1000 MW旋流对冲锅炉配风优化调整
|
摘要
针对某1 000 MW超超临界机组旋流对冲锅炉存在的CO排放质量浓度高、排烟温度高、锅炉效率低于设计值等问题,结合锅炉二次风箱的结构特点,通过数值模拟分析及现场试验对燃烧器配风进行优化调整。结果表明:优化后锅炉在1 000 MW和750 MW负荷下,CO排放质量浓度分别由2 822 mg/m~3、1 795 mg/m~3下降至146 mg/m~3、106 mg/m~3,排烟温度分别下降11.7 K、12.5 K,锅炉效率分别上升1.34百分点、1.19百分点,优化效果显著。
To solve the problems occurring in the swirl-opposed firing boiler of a 1 000 MW ultra-supercritical unit, such as high emission mass concentration of CO, high temperature of exhaust gas and low efficiency of boiler, etc., optimization and adjustment were conducted on the air distribution mode based on simulation analysis and on-site test results, considering structural features of the boiler secondary air box. Results show that at the unit load of 1 000 MW and 750 MW after optimization, the CO emission reduces from 2 822 mg/m~3 and 1 795 mg/m~3 to 146 mg/m~3 and 106 mg/m~3 respectively, with exhaust gas temperature being reduced by 11.7 K and 12.5 K, and boiler efficiency being increased by 1.34% and 1.19%, indicating obvious optimization effectiveness of the boiler.
To solve the problems occurring in the swirl-opposed firing boiler of a 1 000 MW ultra-supercritical unit, such as high emission mass concentration of CO, high temperature of exhaust gas and low efficiency of boiler, etc., optimization and adjustment were conducted on the air distribution mode based on simulation analysis and on-site test results, considering structural features of the boiler secondary air box. Results show that at the unit load of 1 000 MW and 750 MW after optimization, the CO emission reduces from 2 822 mg/m~3 and 1 795 mg/m~3 to 146 mg/m~3 and 106 mg/m~3 respectively, with exhaust gas temperature being reduced by 11.7 K and 12.5 K, and boiler efficiency being increased by 1.34% and 1.19%, indicating obvious optimization effectiveness of the boiler.
引文
[1] 李德波,沈跃良.前后对冲旋流燃煤锅炉CO和NOx分布规律的试验研究[J].动力工程学报,2013,33(7):502-506.
[2] 周平,张广才,严晓勇,等.600 MW机组对冲燃煤锅炉尾部CO浓度偏高的调整试验[J].热力发电,2014,43(12):82-88.
[3] 李金晶,赵振宁,张清峰,等.对冲旋流锅炉的配风调整试验研究[J].热能动力工程,2016,31(8):59-63.
[4] 何翔,孟永杰,周文台,等.旋流对冲锅炉低负荷燃烧调整试验研究[J].锅炉技术,2017,48(4):51-55.
[5] 薛山,惠世恩,周屈兰.配燃尽风的旋流燃烧器对NOx排放和燃尽率影响的试验研究[J].锅炉技术,2018,49(1):38-41.
[6] 王小华,陈敏,牛国平,等.旋流燃烧器低氮改造后的燃烧优化调整[J].锅炉技术,2015,46(3):70-74.
[7] 范庆伟,张帆,刘定坡,等.锅炉二次风箱流量分配特性数值模拟[J].热力发电,2014,43(5):87-92.
[8] 王松浩.旋流对冲锅炉烟煤低氮燃烧特性数值模拟[J].发电设备,2018,32(2):108-113.
[9] 李兵臣,宋景慧,沈跃良,等.二次风旋流强度可调范围的数值模拟研究[J].动力工程学报,2012,32(12):916-921.
[10] 刘建全,孙保民,张广才,等.1 000 MW超超临界旋流燃烧锅炉稳燃特性数值模拟与优化[J].中国电机工程学报,2012,32(8):19-27.
[11] 陈天杰,姚露,刘建民,等.某660 MW前后墙对冲燃煤锅炉贴壁风优化方案的数值模拟[J].中国电机工程学报,2015,35(20):5265-5271.
[2] 周平,张广才,严晓勇,等.600 MW机组对冲燃煤锅炉尾部CO浓度偏高的调整试验[J].热力发电,2014,43(12):82-88.
[3] 李金晶,赵振宁,张清峰,等.对冲旋流锅炉的配风调整试验研究[J].热能动力工程,2016,31(8):59-63.
[4] 何翔,孟永杰,周文台,等.旋流对冲锅炉低负荷燃烧调整试验研究[J].锅炉技术,2017,48(4):51-55.
[5] 薛山,惠世恩,周屈兰.配燃尽风的旋流燃烧器对NOx排放和燃尽率影响的试验研究[J].锅炉技术,2018,49(1):38-41.
[6] 王小华,陈敏,牛国平,等.旋流燃烧器低氮改造后的燃烧优化调整[J].锅炉技术,2015,46(3):70-74.
[7] 范庆伟,张帆,刘定坡,等.锅炉二次风箱流量分配特性数值模拟[J].热力发电,2014,43(5):87-92.
[8] 王松浩.旋流对冲锅炉烟煤低氮燃烧特性数值模拟[J].发电设备,2018,32(2):108-113.
[9] 李兵臣,宋景慧,沈跃良,等.二次风旋流强度可调范围的数值模拟研究[J].动力工程学报,2012,32(12):916-921.
[10] 刘建全,孙保民,张广才,等.1 000 MW超超临界旋流燃烧锅炉稳燃特性数值模拟与优化[J].中国电机工程学报,2012,32(8):19-27.
[11] 陈天杰,姚露,刘建民,等.某660 MW前后墙对冲燃煤锅炉贴壁风优化方案的数值模拟[J].中国电机工程学报,2015,35(20):5265-5271.