Micro-aerobic fermentation device

The utility model discloses a micro-aerobic fermentation device comprising a micro-aerobic fermentation tank which mainly comprises the following structures: a tank body; a mechanical agitation combination positioned in the tank body and connected with a motor; a small hole gas distribution circular pipe positioned at the lower part of the tank body; a ring-shaped heat exchange tube positioned above the small hole gas distribution circular pipe in the tank body and a zigzag baffle arranged on the inner wall of the tank body. Through arranging the mechanical agitation combination in the fermentation tank body and designing the form, size and rotating speed of a mixing vane in a matching way, the utility model achieves the optimum ventilation and mixing of fermentation materials, is beneficial to improving fermentation yield and shortening the fermentation cycle, meets the requirements of small micro-aerobic fermentation ventilation ratio, has less investment and lower energy consumption, and can be used in lar