1000 MW汽轮机快速冷却的应用与分析
|
摘要
以某1000 MW超超临界汽轮机为研究对象,分析了该机组的自然冷却过程并确定了该机组的自然冷却时间。采取炉侧引入空气的方法,设计了快速冷却方案。基于该设计方案,成功进行了1次汽轮机的快速冷却,验证了方案的可行性。结果表明,与自然冷却相比,此次快速冷却可以节约7天左右的停机冷却时间;同时,当采用炉侧引入空气的方案时,需要视再热管道中空气与中压转子的温度差来决定中压缸的快速冷却投入。
In this paper, the natural cooling process of a 1000 MW ultra-supercritical steam turbine is analyzed and its natural cooling time is determined. A rapid cooling scheme, which inhales air from the boiler, is designed. Based on the scheme, the rapid cooling of the steam turbine is successfully carried out, verifying the feasibility of the scheme. The results show that the rapid cooling can save a time of about 7 days compared with the natural cooling; meanwhile, to adopt the scheme of inhaling air from the boiler,the difference between the air temperature and the IP rotor temperature must be considered when determining the rapid cooling of the IP cylinder.
In this paper, the natural cooling process of a 1000 MW ultra-supercritical steam turbine is analyzed and its natural cooling time is determined. A rapid cooling scheme, which inhales air from the boiler, is designed. Based on the scheme, the rapid cooling of the steam turbine is successfully carried out, verifying the feasibility of the scheme. The results show that the rapid cooling can save a time of about 7 days compared with the natural cooling; meanwhile, to adopt the scheme of inhaling air from the boiler,the difference between the air temperature and the IP rotor temperature must be considered when determining the rapid cooling of the IP cylinder.
引文
[1]黄旭鹏,冯庭有.1 036 MW超超临界汽轮机停机快冷方法应用研究[J].电力建设,2011,32(5):72-75.HUANG Xupeng,FENG Tingyou.Research on quick cooling-down method of 1 036 MW ultra-supercritical steam turbines[J].Electric Power Construction,2011,32(5):72-75.
[2]叶绍义,沈琦.玉环电厂超超临界1 000 MW汽轮机组快冷系统的应用[J].热力发电,2009,38(8):89-92.YE Shaoyi,SHEN Qi.Application of rapid cooling-down technology onto ultra-supercritical steam turbine in Yuhuan Power Plant[J].Thermal Power Generation,2009,38(8):89-92.
[3]温新宇,王广慧.国产600 MW机组汽轮机快速冷却技术的应用[J].中国电力,2005,38(9):83-85.WEN Xinyu,WANG Guanghui.The application of fast cooling technology in domestic 600 MW unit[J].Electric Power,2005,38(9):83-85.
[4]钟世青,楼波,王芳.汽轮机高温空气快速冷却特性研究[J].汽轮机技术,2010,52(4):277-280.ZHONG Shiqing,LOU Bo,WANG Fang.Research on quickly cooling system with hot air of steam turbine[J].Turbine Technology,2010,52(4):277-280.
[5]曹丽华,王鹏,李勇.1 000 MW汽轮机快速冷却对高压内缸的影响分析[J].汽轮机技术,2016,58(3):207-210.CAO Lihua,WANG Peng,LI Yong.Analysis on rapid cooling to high-pressure inner cylinder of a 1 000 MW steam turbine[J].Turbine Technology,2016,58(3):207-210.
[6]丁旭春,王元成.600 MW机组汽轮机快冷研究及应用[J].发电设备,2013,27(4):233-236.DING Xuchun,WANG Yuancheng.Research and application of rapid cooling technology for a 600 MW steam turbine[J].Power Equipment,2013,27(4):233-236.
[7]吴建军,茆永.1 000 MW超超临界机组滑停与快冷配合的实践和应用[J].浙江电力,2013(12):44-47.WU Jianjun,MAO Yong.Application and analysis on coordination between sliding shut-down and fast-cooling of 1 000 MW ultra supercritical units[J].Zhejiang Electric Power,2013(12):44-47.
[8]王标,陆锦华.1 000 MW超超临界机组干抽真空快冷技术的应用[J].电力学报,2012,27(1):68-70,93.WANG Biao,LU Jinhua.The application of dry vacuum fast-cooling technology in 1 000 MW ultra-supercritical unit[J].Journal of Electric Power,2012,27(1):68-70,93.
[9]苏国强,王东辉,施俊.西门子1 000 MW汽轮机快速冷却系统应用与分析[J].中国电力,2015,48(11):7-12.SU Guoqiang,WANG Donghui,SHI Jun.The application and analysis of fast cooling system in Siemens 1000-MW Turbines[J].Electric Power,2015,48(11):7-12.
[10]韩彦广,程贵兵,鲁录义.大型汽轮机闷缸过程中汽缸温度场及热变形数值仿真研究[J].汽轮机技术,2016,58(5):341-344.HAN Yanguang,CHENG Guibing,LU Luyi.Numerical simulation for cylinder temperature field and thermal deformation of large-scale steam turbine during cylinder holding[J].Turbine Technology,2016,58(5):341-344.
[11]于达仁,黄洪雁,徐基豫.汽轮机停机后自然冷却过程分析[J].汽轮机技术,1995(3):153-157.YU Daren,HUANG Hongyan,XU Jiyu,et al.Analysis of natural cooling process of steam turbine[J].Turbine Technology,1995(3):153-157.
[12]李明亮.汽轮机快速冷却方式在700 MW机组的综合应用[J].华北电力技术,2006(9):22-25.LI Mingliang.Synthesis application of turbine force cooling mode in700 MW unit[J].North China Electric Power,2006(9):22-25.
[13]黄旭鹏,冯庭有.1 036 MW超超临界汽轮机停机快冷方法应用研究[J].电力建设,2011,32(5):72-75.HUANG Xupeng,FENG Tingyou.Research on quick cooling-down method of 1 036 MW ultra-supercritical steam turbines[J].Electric Power Construction,2011,32(5):72-75.
[2]叶绍义,沈琦.玉环电厂超超临界1 000 MW汽轮机组快冷系统的应用[J].热力发电,2009,38(8):89-92.YE Shaoyi,SHEN Qi.Application of rapid cooling-down technology onto ultra-supercritical steam turbine in Yuhuan Power Plant[J].Thermal Power Generation,2009,38(8):89-92.
[3]温新宇,王广慧.国产600 MW机组汽轮机快速冷却技术的应用[J].中国电力,2005,38(9):83-85.WEN Xinyu,WANG Guanghui.The application of fast cooling technology in domestic 600 MW unit[J].Electric Power,2005,38(9):83-85.
[4]钟世青,楼波,王芳.汽轮机高温空气快速冷却特性研究[J].汽轮机技术,2010,52(4):277-280.ZHONG Shiqing,LOU Bo,WANG Fang.Research on quickly cooling system with hot air of steam turbine[J].Turbine Technology,2010,52(4):277-280.
[5]曹丽华,王鹏,李勇.1 000 MW汽轮机快速冷却对高压内缸的影响分析[J].汽轮机技术,2016,58(3):207-210.CAO Lihua,WANG Peng,LI Yong.Analysis on rapid cooling to high-pressure inner cylinder of a 1 000 MW steam turbine[J].Turbine Technology,2016,58(3):207-210.
[6]丁旭春,王元成.600 MW机组汽轮机快冷研究及应用[J].发电设备,2013,27(4):233-236.DING Xuchun,WANG Yuancheng.Research and application of rapid cooling technology for a 600 MW steam turbine[J].Power Equipment,2013,27(4):233-236.
[7]吴建军,茆永.1 000 MW超超临界机组滑停与快冷配合的实践和应用[J].浙江电力,2013(12):44-47.WU Jianjun,MAO Yong.Application and analysis on coordination between sliding shut-down and fast-cooling of 1 000 MW ultra supercritical units[J].Zhejiang Electric Power,2013(12):44-47.
[8]王标,陆锦华.1 000 MW超超临界机组干抽真空快冷技术的应用[J].电力学报,2012,27(1):68-70,93.WANG Biao,LU Jinhua.The application of dry vacuum fast-cooling technology in 1 000 MW ultra-supercritical unit[J].Journal of Electric Power,2012,27(1):68-70,93.
[9]苏国强,王东辉,施俊.西门子1 000 MW汽轮机快速冷却系统应用与分析[J].中国电力,2015,48(11):7-12.SU Guoqiang,WANG Donghui,SHI Jun.The application and analysis of fast cooling system in Siemens 1000-MW Turbines[J].Electric Power,2015,48(11):7-12.
[10]韩彦广,程贵兵,鲁录义.大型汽轮机闷缸过程中汽缸温度场及热变形数值仿真研究[J].汽轮机技术,2016,58(5):341-344.HAN Yanguang,CHENG Guibing,LU Luyi.Numerical simulation for cylinder temperature field and thermal deformation of large-scale steam turbine during cylinder holding[J].Turbine Technology,2016,58(5):341-344.
[11]于达仁,黄洪雁,徐基豫.汽轮机停机后自然冷却过程分析[J].汽轮机技术,1995(3):153-157.YU Daren,HUANG Hongyan,XU Jiyu,et al.Analysis of natural cooling process of steam turbine[J].Turbine Technology,1995(3):153-157.
[12]李明亮.汽轮机快速冷却方式在700 MW机组的综合应用[J].华北电力技术,2006(9):22-25.LI Mingliang.Synthesis application of turbine force cooling mode in700 MW unit[J].North China Electric Power,2006(9):22-25.
[13]黄旭鹏,冯庭有.1 036 MW超超临界汽轮机停机快冷方法应用研究[J].电力建设,2011,32(5):72-75.HUANG Xupeng,FENG Tingyou.Research on quick cooling-down method of 1 036 MW ultra-supercritical steam turbines[J].Electric Power Construction,2011,32(5):72-75.