Abstract: This paper analyses the problems existing in the vacuum system in the thermal power plant and introduces the energy saving transformation of the vacuum system. It is considered that the application of the steam ejector in the vacuum system of the condenser is an effective means to solve the problem of the vacuum system in the thermal power plant. The effect of the energy saving transformation of the vacuum system is analyzed by detailed data comparison. Finally, some suggestions are put forward on the energy saving transformation of the vacuum system.

Key words: steam turbine, vacuum system, water ring vacuum pump, steam ejector, energy saving transformation