Self-priming air-lift fermenter

Abstract

A self-priming air-lift fermentation tank, comprising a tank body, an air intake device, an exhaust device, a flow guide device, and an air intake pipe and an exhaust pipe arranged on the tank body, the air intake device is a swirl mixer, and is located in The bottom of the tank body is connected with the air inlet pipe, and the flow guide device is located in the tank above the swirl mixer. A stirring shaft with a stirrer is arranged on the axis of the tank body, the upper end of the stirring shaft protrudes from the tank body and is connected with the motor, the lower end of the stirring shaft is connected with the swirl mixer, and the stirrer is located in the lower part of the guide tube. The cyclone mixer used in the present invention can rotate with the stirring shaft, and the liquid obtains high kinetic energy by means of the rotating cyclone mixer, and produces a suction effect when leaving, so that the sucked air can be absorbed at a lower pressure It enters the fermentation tank, and is conducive to improving the utilization rate of air. It has the characteristics of simple structure, good gas-liquid mixing effect, and high fermentation efficiency. The comprehensive energy saving is very significant.

Description

technical field [0001] The invention relates to a fermenter, in particular to a self-priming air-lift fermenter used in large-scale industrial production as an aerobic microbial fermentation. Background technique [0002] Usually, the aerobic microbial fermentation tank has a stirring system, a cooling system, and a ventilation and exhaust device inside. With the continuous expansion of industrial mass production fermentation scale, the diameter and height of a single fermentation tank have also doubled. The diameter of the fermenter has increased from 2m to 4m in the past to the current 4m to 10m; the height has increased from the past 5m to 10m to the current 10m to 20m. Since the stirring power is proportional to the 5th power of the diameter of the stirrer, the stirring power doubles after the volume of the fermenter is enlarged, resulting in a substantial increase in energy consumption. At the same time, the static pressure of the liquid layer in the tank increases, a...

AI Technical Summary

Problems solved by technology

This kind of fermentation tank has no stirring device, and the fermentation gas and liquid are mixed in a swirl state under the action of the swirl mixer, and circulate inside and outside along the flow guide device, but the swirl mixer works statically and cannot rotate. Gas-liquid mixing requires a fairly high-pressure airflow, so the effect of gas-liquid mixing is not very ideal, especially not suitable for the fermentation of high-viscosity materials

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