汽轮机汽封改造方案及其效果分析  

Analysis of Steam Seal Modification Scheme and Its Effect on Steam Turbine

作　　者：李海登 Li Haideng(Guodian Power Datong Power Generation Co.,Ltd.,Datong Shanxi 037000,China)

机构地区：[1]国电电力大同发电有限责任公司,山西大同037000

出　　处：《现代工业经济和信息化》2024年第8期266-268,共3页Modern Industrial Economy and Informationization

摘　　要：为降低汽轮机的漏汽损失和热耗,对高中压缸部分应用布莱登汽封及间隙优化改造、对低压缸采取间隙优化改造。改造后,经试验验证机组现有滑压曲线的经济性。实践表明,改造后的汽轮机高中压缸效率分别提升至84.6%、92.08%;汽封漏汽率降至1.8%,降低0.2%;各轴瓦振幅均小于80 m;能耗减少225.39 kJ/kW·h,供电能耗降低10.32 g/kW·h,每年可节约4万t标煤,节能效果显著。In order to reduce the steam leakage loss and heat consumption of the steam turbine,the high and medium pressure cylinders are partially modified by applying Braden steam seal and gap optimisation,and the low pressure cylinders are modified by gap optimisation.After the modification,the economy of the existing slip pressure curve of the unit is verified by test.After practical application,the efficiency of the high and medium pressure cylinders of the modified turbine is increased to 84.6%and 92.08%respectively;the leakage rate of the steam seal is reduced to 1.8%,which is 0.2%lower;the amplitude of each axial tile is less than 80 m;the energy consumption is reduced by 225.39 kJ/kW-h,the energy consumption of the power supply is reduced by 10.32 g/kW-h,and the annual savings of 40,000 t of standard coal can be made,which is a remarkable energy-saving effect.

关 键 词：汽轮机 汽封改造 布莱登改造 供电能耗 

分 类 号：TM621[电气工程—电力系统及自动化]