Fermentation energy-saving device

The utility model discloses a fermentation energy-saving device, belongs to the technical field of fermentation, and aims to solve the problem that the fermentation quality is influenced as materials in an existing fermentation tank cannot be uniformly heated and fermented. Comprising a plurality of hot air curtains, a steam pipeline, a water return pipeline, a floor heating circulating water pipeline and a heat exchanger. Steam provides circulating hot air for the interlayer space through the hot air curtain, the steam is condensed into high-temperature hot water after releasing heat, and the floor heating circulating pipeline absorbs heat of the high-temperature hot water to circularly heat the bottom of the fermentation tank, so that materials in the fermentation tank are uniformly heated and fermented, and the fermentation quality is improved. The temperature sensor collects interlayer space temperature data, when the interlayer space temperature exceeds a set temperature limit, the temperature sensor out