Coaxial double-blade submersible mixer for large fermentation tank

Abstract

The invention relates to a gas-liquid-solid multi-phase mixing device for a fermentation tank, in particular to a coaxial double-blade submersible mixer for a large fermentation tank. The coaxial double-blade submersible mixer comprises a submersible motor, an inner rotating shaft, an outer rotating shaft, a first bevel gear, a second bevel gear and two groups of blades of which the installation directions are opposite; the first bevel gear and the second bevel gear are arranged in the submersible motor and driven by a rotor arranged in the submersible motor to synchronously rotate, the outer rotating shaft is installed on the submersible motor, the end, located in the submersible motor, of the outer rotating shaft is fixedly connected with the second bevel gear, the end, located outside the submersible motor, of the outer rotating shaft is fixedly connected with the first groups of blades, the inner rotating shaft is arranged in the outer rotating shaft, one end of the inner rotating shaft stretches out of the outer rotating shaft and penetrates through the second bevel gear to be fixedly connected with the first bevel gear, and the other end of the inner rotating shaft stretches out of the outer rotating shaft to be fixedly connected with the second groups of blades. According to the coaxial double-blade submersible mixer, coaxial opposite-blade mixing can be achieved, and the mixing and stirring effects achieved in the large fermentation tank are greatly improved.

Description

technical field [0001] The invention relates to a gas-liquid-solid multiphase mixing device for a fermenter, in particular to a coaxial double paddle submersible agitator for a large fermenter. Background technique [0002] In bioreactors, biochemical reactions rely on mass transfer to achieve the actual contact between the substrate and microorganisms, and the generation of mass transfer depends on good stirring equipment. At present, in large-scale fermentation tanks, the role of mixing and agitation in promoting the fermentation process is obvious: to fully suspend and disperse solid materials in the feed liquid, to promote uniform mixing of new and old materials, to increase the contact surface with microorganisms, and to avoid solid material deposition or formation. Shell and eliminate the difference in temperature and concentration in the tank, etc. In the fermentation system, mechanical agitation is widely used, mainly including: paddle type, turbine type, propulsion...

AI Technical Summary

Problems solved by technology

In fact, there are some defects in this, mainly in that the form of the paddle does not fully meet the tank structure requirements of the large-scale fermentation tank. On the wall and internal components of the fermentation tank, the solid matter in the fermentation tank will settle or the solids suspended on the liquid surface will be crusted, which will seriously affect the fermentation effect. The paddle form has higher requirements

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