Fermentation liquid compound defoaming device

Abstract

The invention discloses a fermentation liquid compound defoaming device, relates to the field of itaconic acid fermentation tanks and is used for solving the defoaming problem during the fermentation process of itaconic acid. The fermentation liquid compound defoaming device comprises a fermentation tank body, wherein a stirring shaft is arranged in the fermentation tank body, a rake type defoaming paddle is mounted on the stirring shaft, the stirring shaft is driven by a first motor, an exhaust pipeline is arranged at the upper part of the fermentation tank body, and the fermentation liquid compound defoaming device is characterized in that rake teeth at the bottom of the rake type defoaming paddle are irregularly arranged like a triangle, and one angle of the rake teeth is consistent with the rotation direction of the stirring shaft; and a foam collecting pipeline which leading foam to outside is arranged above the rake type defoaming paddle in the fermentation tank body, the foam collecting pipeline is connected with a defoaming device outside a tank, and the defoaming device outside the tank is connected with the fermentation tank body via a material liquid return pipe. Due to the adoption of a compound defoaming technology which adopts the rake type defoaming paddle and a multi-layer filter screen for defoaming and adopts stirring blades in an outer tank body for defoaming, defoaming can be performed timely, rapidly and thoroughly.

Description

technical field [0001] The invention relates to the field of itaconic acid fermentation tanks, in particular to a fermented liquid composite defoaming device used in the itaconic acid fermentation process. Background technique [0002] In the process of itaconic acid fermentation, the foam is actually a colloidal system composed of aerosol, the dispersed phase is air and metabolic gas, the continuous phase is the fermentation broth, and the foam is separated from each other by a liquid film. According to the reason of foam generation, we summed up the law of foam change: From the perspective of ventilation and stirring, the greater the ventilation volume and the more vigorous the stirring, the more foam will be produced; from the perspective of the properties of fermentation broth, the protein content in the medium The more, the viscosity of the fermentation broth, the greater the concentration, the higher the stability of the generated foam. From the perspective of bacteri...

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Problems solved by technology

Based on the above situation, it can be concluded that the current mechanical defoaming has its own defects, whether it is defoaming inside the tank or de

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