Defoaming device for yeast production

The utility model provides a defoaming device for yeast production, which comprises an upper cover on a fermentation tank, an annular pipe is fixedly arranged in the upper cover, a plurality of atomizing nozzles are arranged on the peripheral side of the lower part of the annular pipe and are inclined inwards, and spray diffusion surfaces of the plurality of atomizing nozzles cover the inner diameter of the fermentation tank; and a defoaming agent flows in the annular pipe and is sprayed out from the atomizing spray head. The thickness of bubbles in the fermentation tank can be calculated through the difference value of the liquid level sensor and the bubble detection sensor, after the thickness reaches the set height, a defoaming agent is conveyed into the annular pipe from the liquid inlet pipe in a pumping mode and sprayed out from the atomization spray head, the defoaming agent is converted into spray mist to cover the interior of the fermentation tank, and therefore the bubbles can be eliminated more qui