A fermenter stirring system

Abstract

The utility model belongs to the field of fermentation tank, concretely relates to a kind of fermentation tank stirring system, including tank body, stirring shaft, driving mechanism and multiple radial flow curved blade stirrers, tank body has stirring cavity, stirring shaft rotation is set in tank body and extends in stirring cavity, driving mechanism is set on tank body, for driving stirring shaft rotation, multiple curved blade radial flow stirrers are fixedly set along the axial direction direction of stirring shaft, and distribute at different height of stirring cavity;The fermentation tank stirring system adopts multiple curved blade radial flow stirrer structure design, compressed air is more easily from curved blade radial flow stirrer in fermentation process, shortens the residence time of air in fermentation broth, while multiple curved blade radial flow stirrers make air as far as possible to be dispersed, effectively reduce the concentration of carbon dioxide in fermentation broth, promote the growth of microorganism, it is favorable to enhance fermentation effect.

Description

Technical Field

[0001] This utility model belongs to the field of fermentation tank technology, and specifically relates to a fermentation tank stirring system. Background Technology

[0002] A fermenter is an industrial device used for microbial fermentation. The fermenter's mixing system mechanically replaces manual stirring and mixing of materials to maximize efficiency. It is widely used in industries such as coatings, pharmaceuticals, building materials, chemicals, pigments, resins, food, and scientific research.

[0003] In existing aerated fermenter mixing systems, the agitator is generally configured as a combination of a down-pressure axial flow agitator and a radial flow agitator. Although this combination has a strong gas-liquid dispersion capability, the down-pressure axial flow agitator also prolongs the residence time of air in the liquid, causing carbon dioxide and other substances in the air to dissolve along with it. This makes it easy for the concentration of carbon dioxide in the medium to exceed the standard, affecting the growth of microorganisms in the medium, thus affecting the fermentation indicators and greatly impacting the fermentation effect. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a fermenter stirring system that can effectively improve the fermentation effect.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a fermenter stirring system, comprising a tank body, a stirring shaft, a drive mechanism, and multiple radial flow curved blade stirrers. The tank body has a stirring chamber. The stirring shaft is rotatably mounted on the tank body and extends into the stirring chamber. The drive mechanism is mounted on the tank body and is used to drive the stirring shaft to rotate. The multiple curved blade radial flow stirrers are fixedly arranged at intervals along the axial direction of the stirring shaft and distributed at different heights in the stirring chamber.

[0006] In some embodiments, each of the curved blade radial flow agitators includes a bushing and a plurality of blades, the bushing being fixed to the agitator shaft, and the plurality of blades being distributed in a circular array on the bushing.

[0007] In some embodiments, each blade is shaped like an arcuate sheet.

[0008] In some embodiments, the blade includes a blade root and a blade tip, and a reinforcing rib extending from the blade root to the blade tip is provided on one side of the blade.

[0009] In some embodiments, the bushing includes a first semi-circular bushing and a second semi-circular bushing, with a plurality of fasteners connecting the first semi-circular bushing and the second semi-circular bushing, and a clamping cavity for clamping on the stirring shaft between the first semi-circular bushing and the second semi-circular bushing, and the plurality of blades are respectively disposed on the outer peripheral walls of the first semi-circular bushing and the second semi-circular bushing.

[0010] In some embodiments, the number of the curved blade radial flow agitators is 2-6.

[0011] In some embodiments, a plurality of support members are spaced apart in the stirring chamber along the axial direction of the stirring shaft, and an intermediate bearing is provided between the stirring shaft and the plurality of support members.

[0012] In some embodiments, the drive mechanism includes a frame mounted on the tank and a permanent magnet direct drive motor mounted on the frame, wherein the stirring shaft extends within the frame and is linked with the permanent magnet direct drive motor.

[0013] In some embodiments, the frame is provided with a coupling connecting the output shaft of the permanent magnet direct drive motor and the stirring shaft.

[0014] In some embodiments, the frame is provided with a shaft seal that cooperates with the stirring shaft seal.

[0015] The beneficial effects of this invention are as follows: The fermenter stirring system adopts a structure design of multiple curved blade radial flow agitators. During the fermentation process, compressed air can more easily pass through the curved blade radial flow agitators, shortening the residence time of air in the fermentation liquid. At the same time, multiple curved blade radial flow agitators disperse the air as much as possible, effectively reducing the concentration of carbon dioxide in the fermentation liquid, promoting the growth of microorganisms, and enhancing the fermentation effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0017] Figure 1 This is a structural diagram of an embodiment of the present utility model; Figure 2 This is a perspective view of the curved blade radial flow agitator according to an embodiment of the present invention; Figure 3 This is a front view of the curved blade radial flow agitator according to an embodiment of the present invention. Detailed Implementation

[0018] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0020] The directional and positional terms used in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: like Figure 1-3 As shown, a fermenter stirring system includes a tank body 1, a stirring shaft 2, a drive mechanism 3, and multiple radial flow curved blade stirrers 4. The tank body 1 has a stirring chamber 100. The stirring shaft 2 is rotatably mounted on the tank body 1 and extends into the stirring chamber 100. The drive mechanism 3 is mounted on the tank body 1 and is used to drive the stirring shaft 2 to rotate. The multiple curved blade radial flow stirrers 4 are fixedly arranged at intervals along the axial direction of the stirring shaft 2 and distributed at different heights in the stirring chamber 100.

[0022] like Figure 2 and 3As shown, each curved-blade radial flow agitator 4 includes a bushing 41 and multiple blades 42. The bushing 41 is fixed to the agitator shaft 2, and the multiple blades 42 are arranged in a circular array on the bushing 41. This multiple-blade structure design effectively improves the mixing efficiency of the curved-blade radial flow agitator. Each blade 42 is arc-shaped. The arc-shaped blade design effectively increases the specific surface area for gas-liquid contact, allowing oxygen to dissolve into the fermentation broth more quickly, thus meeting the extremely high oxygen demand of aerobic microorganisms. Each blade 42 includes a blade root 421 and a blade tip 422. A reinforcing rib 423 extending from the blade root 421 to the blade tip 422 is located on one side of each blade 42. The reinforcing rib enhances the overall strength of the blade, which helps to extend the service life of the fermenter agitation system. The bushing 41 includes a first semi-circular bushing 411 and a second semi-circular bushing 412. Multiple fasteners 413 connect the first semi-circular bushing 411 and the second semi-circular bushing 412. A clamping cavity 410, which holds the stirring shaft 2, exists between the first semi-circular bushing 411 and the second semi-circular bushing 412. Multiple blades 42 are respectively disposed on the outer peripheral walls of the first semi-circular bushing 411 and the second semi-circular bushing 412. The bushing adopts a first semi-circular bushing and second semi-circular bushing structure design, which facilitates the assembly of the bushing with the stirring shaft and improves assembly efficiency. There are five curved-blade radial flow agitators 4. The use of multi-layer curved-blade radial flow agitators establishes strong radial circulation, ensuring that the material concentration, temperature, and pH value in each area of ​​the tank remain highly consistent, providing a stable and uniform environment for microbial growth, which is beneficial for improving product quality and yield.

[0023] like Figure 1 As shown, multiple support members 11 are spaced apart along the axial direction of the stirring shaft 2 within the stirring chamber 100, and intermediate bearings 12 are respectively installed between the stirring shaft 2 and the multiple support members 11. The intermediate bearings prevent excessive lateral vibration and deflection during stirring, ensuring the long-term, stable, and safe operation of the entire stirring system. The drive mechanism 3 includes a frame 31 mounted on the tank body 1 and a permanent magnet direct drive motor 32 mounted on the frame 31. The stirring shaft 2 extends within the frame 31 and is linked with the permanent magnet direct drive motor 32. The permanent magnet direct drive motor adopts a maintenance-free design, solving the problems of high subsequent maintenance costs and cumbersome maintenance of traditional equipment. A coupling 33 is installed within the frame 31, connecting the output shaft of the permanent magnet direct drive motor 32 and the stirring shaft 2. The coupling simplifies the connection between the output shaft of the permanent magnet direct drive motor and the stirring shaft, ensures the required strength for transmission, improves transmission efficiency, and reduces cost. A shaft seal 34 is installed within the frame 31, sealingly engaging with the stirring shaft 2. Shaft seals can improve the sealing performance between the frame and the mixing shaft.

[0024] The fermenter mixing system adopts a structure design with multiple curved blade radial flow agitators. During the fermentation process, compressed air can pass through the curved blade radial flow agitators more easily, shortening the residence time of air in the fermentation liquid. At the same time, multiple curved blade radial flow agitators disperse the air as much as possible, effectively reducing the concentration of carbon dioxide in the fermentation liquid, promoting the growth of microorganisms, and enhancing the fermentation effect.

[0025] The above description is only one embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model; the scope of protection of the present utility model is defined by the claims in the claims, and all equivalent changes and modifications made in accordance with the utility model are within the scope of protection of the present utility model patent.

Claims

1. A fermenter stirring system, characterized in that: The device includes a tank, a stirring shaft, a drive mechanism, and multiple radial flow curved blade agitators. The tank has a stirring chamber. The stirring shaft is rotatably mounted on the tank and extends into the stirring chamber. The drive mechanism is mounted on the tank and is used to drive the stirring shaft to rotate. The multiple curved blade radial flow agitators are fixedly spaced along the axial direction of the stirring shaft and distributed at different heights within the stirring chamber.

2. The fermenter stirring system according to claim 1, characterized in that: Each of the aforementioned curved blade radial flow agitators includes a bushing and multiple blades, wherein the bushing is fixed to the agitation shaft and the multiple blades are distributed in a circular array on the bushing.

3. The fermenter stirring system according to claim 2, characterized in that: Each blade is shaped like an arc.

4. The fermenter stirring system according to claim 3, characterized in that: The blade includes a blade root and a blade tip, and a reinforcing rib extending from the blade root to the blade tip is provided on one side of the blade.

5. The fermenter stirring system according to claim 4, characterized in that: The bushing includes a first semi-circular bushing and a second semi-circular bushing, with multiple fasteners connecting the first and second semi-circular bushings. The first and second semi-circular bushings have a clamping cavity that holds the stirring shaft between them, and the multiple blades are respectively disposed on the outer peripheral walls of the first and second semi-circular bushings.

6. The fermenter stirring system according to claim 1, 2, 3, 4, or 5, characterized in that: The number of the curved blade radial flow agitators is 2-6.

7. The fermenter stirring system according to claim 1, characterized in that: Multiple support members are spaced apart along the axial direction of the stirring shaft inside the stirring chamber, and intermediate bearings are respectively provided between the stirring shaft and the multiple support members.

8. The fermenter stirring system according to claim 1, characterized in that: The drive mechanism includes a frame mounted on the tank and a permanent magnet direct drive motor mounted on the frame. The stirring shaft extends inside the frame and is linked with the permanent magnet direct drive motor.

9. The fermenter stirring system according to claim 8, characterized in that: The frame is equipped with a coupling connecting the output shaft of the permanent magnet direct drive motor and the stirring shaft.

10. The fermenter stirring system according to claim 8 or 9, characterized in that: The frame is equipped with a shaft seal that mates with the stirring shaft seal.

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