Vacuum system based on vacuum pump

The utility model discloses a vacuum system based on a vacuum pump. The vacuum system comprises a main condenser, a water jet air ejector unit and a vacuum pump unit. A first condenser communicating pipe of the main condenser is respectively connected with the water jet air ejector unit and the vacuum pump unit; the vacuum pump unit comprises a valve assembly, a vacuum pump, a working fluid circulating pump and a steam-water separator which are sequentially connected and is used for maintaining the vacuum degree of the main condenser. In the utility model, the vacuum pump unit and the water jet air ejector unit can run in parallel or are mutually standby, and meanwhile, the vacuum pump unit can also improve the air exhaust efficiency of the vacuum system, save the power consumption, increase the benefit of a generator set and enhance the operation stability of the vacuum system on the basis of maintaining the vacuum degree of the main condenser. 本实用新型公开了一种基于真空泵的真空系统，包括：主凝汽器、射水抽气器单元和真空泵单元；主凝汽器的第一凝汽器连通管与射水抽气器单元