Comprehensive utilization system for low-grade heat energy of ammonia synthesis system

The utility model discloses a low-grade heat energy comprehensive utilization system of a synthetic ammonia system. The low-grade heat energy comprehensive utilization system comprises a low-pressure saturated steam device, a steam mixer, a steam distribution cylinder, a drying device, a condensate collecting pipe, a biological fermentation tank and a condensate collecting tank, one inlet end of the steam mixer is further communicated with a high-pressure superheated steam pipe, and the outlet end of the condensate collecting tank is communicated with a water supplementing inlet of the low-pressure saturated steam device through a conveying pump. The use of circulating water is effectively reduced, the conveying problem of low-pressure saturated steam is solved, and the utilization of low-grade heat energy of a synthetic ammonia system is realized. 本实用新型公开了一种合成氨系统低品位热能综合利用系统，包括出口-进口依次连通的低压饱和蒸汽装置、蒸汽混合器、蒸汽分气缸、干燥装置、冷凝液汇集管、生物发酵罐和冷凝液收集罐；蒸汽混合器的其中一个进口端还连通有高压过热蒸汽管，冷凝液收集罐的出口端经输送泵连通低压饱和蒸汽装置的补水进口。有效减少了循环水的使用，解决了低压饱和蒸汽的输