The utility model discloses a
yeast solid fermentation reactor and relates to the technical field of
fermentation equipment. The utility model discloses a
yeast solid fermentation reactor which comprises a tank body, a
discharge conveyor and a fermentation liquor circulating spraying mechanism, the discharging conveyor is located at the bottom of the tank body, and a discharging port of the tank body is connected with the top face of a
machine body of the discharging conveyor; the fermentation liquor circulating spraying mechanism comprises a container, a
circulating pump, a main pipeline and a spraying
branch pipe; the container is located at the bottom of the tank body and connected with the bottom face of a
machine body of the discharging conveyor through a pipeline. The spraying
branch pipe is positioned in the tank body and is fixed on the inner top wall of the tank body; a plurality of fermentation liquor nozzles are arranged on the bottom surface of a
pipe body of the spraying
branch pipe; one end of the main pipeline is connected to the bottom of the container, and the other end extends upwards into the tank body and is connected with the spraying branch pipe; the
circulating pump is connected to the main pipeline in series. According to the utility model, a fermentation liquor circulating spraying mechanism is designed, so that the fermentation temperature can be better controlled, and
yeast strains can be recycled after the fermentation operation is finished.