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机构地区:[1]华北电力科学研究院(西安)有限公司,陕西西安710065
出 处:《节能技术》2018年第1期79-83,共5页Energy Conservation Technology
摘 要:针对某600 MW亚临界汽轮机在长期运行后,由于通流部分表面积垢,叶片侵蚀,中压隔板变形,汽封漏气增大等因素,造成的机组热耗增加、热效率降低、安全性能下降的问题,采用将主、再热蒸汽温度由535℃提升至566℃,更换汽轮机高中压缸及主、再热蒸汽管道,调整汽轮机轴封间隙等方法对机组进行提温增效节能改造,并对改造前后机组经济性进行对比和分析,改造后机组热耗值由8 351.12 kJ/(kW·h)下降至7 751.47 k J/(kW·h),供电煤耗由325.7 g/(kW·h)下降至300.7 g/(kW·h),改造节能效果明显。For a 600 MW subcritical steam turbine after the long-term operation,the flow part of the surface fouling,leaf erosion,pressure diaphragm deformation,steam seal leakage and other factors,resulting in increased heat unit,thermal efficiency,safety performance and other issues,using the main and reheat steam temperature from 535 ℃ to 566 ℃,replace the steam turbine high and medium pressure cylinder and the main and reheat steam pipe,adjust the steam turbine shaft seal gap and other methods to improve the efficiency of the unit energy efficiency transformation,analysis and comparison before and after the transformation of the unit's economy,the results show that after the transformation of the unit heat value from 8 351. 12 kJ/( kW·h) decreased to 7 751. 47 kJ/( kW·h),and the power supply coal consumption was reduced from 325. 7 g/( kW·h) to 300. 7 g/( kW·h),and the energy saving effect was obvious.
关 键 词:通流改造 提高汽温 增加效率 节能改造 机组热耗
分 类 号:TM621[电气工程—电力系统及自动化]
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