Fermentation tank capable of strengthening stirring and preventing precipitation and use method thereof

The design of a multi-gear rack transmission system and special-shaped scrapers solves the problem of solid particle sedimentation caused by insufficient stirring in the fermentation tank, achieves uniform distribution and flow of materials in the tank, and improves fermentation efficiency and product quality.

CN120665689APending Publication Date: 2025-09-19ZHENJIANG EAST BIOTECH EQUIP & TECH
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Patent Information

Application Number
CN202510892940.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-30
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

The agitator of the existing fermentation tank has a limited stirring range, which causes solid particles to settle during the fermentation process, affecting the uniformity and taste of the product and prolonging the fermentation cycle.

Method used

It adopts a multi-gear rack transmission system, and the motor drives the brake disc to drive multiple sets of stirring rods and stirring blades to achieve multi-zone stirring in the tank, and is equipped with special-shaped scrapers to prevent material sedimentation.

Benefits of technology

It effectively avoids blind spots in mixing, ensures uniform distribution of materials, improves fermentation efficiency and product quality, and prevents precipitation from affecting taste and appearance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides a fermentation tank capable of enhancing stirring and preventing precipitation and a use method thereof, and relates to the technical field of fermentation tanks, the fermentation tank comprises a tank body, three groups of brackets are fixedly connected to the outer wall of the tank body at equal intervals, a brake disc is driven by a motor to rotate, and a second gear on the brake disc is matched with a first gear and rotates around the outer ring of the first gear; meanwhile, a second gear drives a third gear to rotate through the other group of second gears, and then the third gear drives fixing discs and stirring rods to rotate, so that the four groups of fixing discs and stirring rods stir materials in the tank body, and meanwhile, stirring blades are matched, so that the purpose of increasing the stirring range is achieved; and the flowing speed of the material in the tank body is increased, so that the material is always in a flowing state, and a stirring blind area is not easy to form at the bottom end of the tank body, thereby solving the problems that solid particles in the fermentation raw material are precipitated due to insufficient stirring, the uniformity of the product is damaged, and the taste and the appearance are influenced.
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Description

Technical Field

[0001] The present invention relates to the technical field of fermentation tanks, and in particular to a fermentation tank with enhanced stirring and anti-sedimentation function and a use method thereof. Background Art

[0002] In industrial production across the food, pharmaceutical, and biochemical industries, fermentation tanks are core equipment, and the performance of their stirring systems directly impacts fermentation efficiency and product quality. Taking dairy fermentation as an example, Junnong Dairy's patented technology demonstrates that the precipitation of solid particles during fermentation can lead to reduced filtration efficiency, poor product solubility, and even impaired nutrient absorption. Furthermore, in enzyme production, the sedimentation of mixed solid-liquid fermentation feedstocks can hinder adequate material contact, prolonging the fermentation cycle and reducing product yield.

[0003] In the existing technology, traditional fermentation tanks usually use paddle-type, turbine-type agitators, etc. These agitators have a limited stirring range during operation, making it difficult to stir the materials in the entire fermentation tank on a large scale, and easily forming a stirring "blind spot". In the field of food fermentation, when producing products such as yogurt and soy sauce, insufficient stirring will cause solid particles in the fermentation raw materials to precipitate, destroying the uniformity of the product and affecting the taste and appearance. Summary of the Invention

[0004] The present invention mainly provides a fermentation tank with enhanced stirring and anti-sedimentation and a use method thereof.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a fermentation tank with enhanced stirring and anti-sedimentation, comprising a tank body, three groups of brackets fixedly connected to the outer wall of the tank body at equal intervals, a tank cover fixedly connected to the top of the tank body through a flange, a discharge port fixedly connected to the bottom surface of the tank body, the discharge port being connected to the interior of the tank body, and a mixing component for stirring the material being provided on the tank cover and the tank body.

[0006] Preferably, the mixing assembly includes a support plate fixedly connected to the top surface of the tank cover, the top surface of the support plate is fixedly connected to the motor, the motor output shaft passes through the tank cover, and a stirring blade is fixedly connected to the motor output shaft, the tank cover is fixedly connected to the first gear on one end surface facing the inner wall of the tank body, and the stirring blade rotates in the first gear, and a brake disc is fixedly connected to the stirring blade output shaft below the first gear, and four groups of connecting plates are fixedly connected to the outer wall of the brake disc at equal intervals, the four groups of connecting plates are built with first bearings, and the four groups of first bearings are each built with a second bearing on the surface of the connecting plate on the side facing the brake disc, and the upper and lower end surfaces of the four groups of second bearings are each fixedly connected to two groups of second gears, a group of second gears on the upper ends of the four groups of connecting plates are each meshed with the first gear, the top surfaces of the four groups of first bearings are each fixedly connected to a third gear, and the four groups of third gears are each meshed with another group of second bearings below the connecting plate, the bottom end surfaces of the four groups of third gears are each fixedly connected to a fixed disc, and the bottom surfaces of the four groups of fixed discs are each fixedly connected to multiple groups of stirring rods.

[0007] Preferably, four groups of stirring rods are provided, and the four groups of stirring rods are all cylindrical in design, and the four groups of stirring rods are arranged at equal intervals on the bottom surface of the fixed plate.

[0008] Preferably, the input end of the motor is electrically connected to the controller via a wire, and a placement box for storing the controller is provided on the outer wall of the tank.

[0009] Preferably, a sealing ring is provided between the tank body and the tank cover, and the sealing ring is designed to be embedded on the bottom surface of the tank cover.

[0010] Preferably, a plurality of groups of special-shaped scrapers are fixedly connected to the bottom end surface of the stirring blade, and the outer walls of the plurality of groups of special-shaped scrapers are in contact with the inner wall of the tank.

[0011] Preferably, four groups of special-shaped scrapers are provided, and the four groups of special-shaped scrapers are fixedly connected to the outer wall of the stirring blade at equal intervals, and the four groups of special-shaped scrapers are designed in an arc shape.

[0012] Preferably, the bottom end of the special-shaped scraper is in contact with the inner wall of the bottom end of the tank body.

[0013] Preferably, four groups of the fixed disks are provided, and the four groups of the fixed disks are fixedly connected to the bottom end surface of the third gear at equal intervals.

[0014] The present invention also adopts the following technical solution, and the specific method is as follows: S1. Place the tank body stably with three sets of brackets to ensure it is level. Fit the embedded sealing ring at the bottom of the tank cover to the top of the tank body. Fix the tank cover with a flange to form a sealed environment. Add fermentation raw materials into the tank body from the opening at the top of the tank cover to ensure that the amount of material does not exceed the reasonable range of the tank body volume.

[0015] S2. Turn on the controller power supply and start the motor through the controller. The motor output shaft drives the stirring blade to rotate in the first gear. At the same time, the brake disc at the lower end of the motor output shaft starts to rotate.

[0016] S3, the four sets of connecting plates on the outer wall of the brake disc rotate with the brake disc, and the second gear on the connecting plate engages with the first gear fixed on the tank cover, causing the second gear to rotate around the outer ring of the first gear; The second gear drives another set of second gears to rotate through the second bearing, and then drives the third gear on the top of the first bearing to rotate; The third gear drives the fixed disk and the four sets of cylindrical stirring rods at the bottom to rotate. The four sets of fixed disks simultaneously stir the material in the tank in multiple areas, and cooperate with the stirring blades to expand the stirring range, accelerate the flow of materials and avoid sedimentation.

[0017] S. The four sets of arc-shaped scrapers at the bottom of the mixing blade rotate with the mixing blade. Their outer walls fit the inner wall of the tank and scrape the side wall and the inner wall of the bottom of the tank to prevent the material from adhering to the sediment. S5. After the fermentation is completed, the motor is turned off through the controller, and the discharge port at the bottom of the tank is opened to discharge the material through the discharge port to complete the unloading.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are: 1. In the present invention, the brake disc is driven to rotate by a motor, so that the second gear on the brake disc cooperates with the first gear and rotates around the outer ring of the first gear. At the same time, the second gear drives the third gear to rotate through another group of second gears, and then drives the fixed disc and the stirring rod to rotate through the third gear, so that the four groups of fixed discs and the stirring rod stir the material in the tank body. At the same time, the stirring blades are used to increase the stirring range, increase the flow speed of the material in the tank body, keep the material in a flowing state at all times, and make it difficult for a stirring "blind spot" to form at the bottom of the tank body, thereby solving the problem that solid particles in the fermentation raw materials will precipitate due to insufficient stirring, destroy the uniformity of the product, and affect the taste and appearance.

[0019] 2. In the present invention, four groups of special-shaped scrapers are fixedly connected to the bottom of the stirring blades, and the special-shaped scrapers are fitted with the side walls and the inner wall of the bottom end of the tank body, so that the stirring blades synchronously drive the four groups of special-shaped scrapers to rotate, and the special-shaped scrapers scrape the side walls and the inner wall of the bottom end of the tank body to prevent the material from settling on the inner wall of the bottom end of the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of a fermentation tank with enhanced stirring and anti-sedimentation provided by the present invention; Figure 2This is a schematic diagram of the bottom-up structure of a fermentation tank with enhanced stirring and anti-sedimentation proposed by the present invention; Figure 3 A schematic diagram of a three-dimensional partial cross-sectional structure of a fermentation tank with enhanced stirring and anti-sedimentation proposed by the present invention; Figure 4 This is a schematic diagram of a partial cross-sectional structure of a mixing assembly of a fermentation tank with enhanced stirring and anti-sedimentation proposed by the present invention; Figure 5 The present invention provides an exploded view of the local structure of the connecting plate of a fermentation tank with enhanced stirring and anti-sedimentation.

[0021] Legend: 1. Tank body; 2. Bracket; 3. Tank cover; 4. Discharge port; 5. Mixing assembly; 51. Support plate; 52. Motor; 53. Stirring blade; 54. First gear; 55. Brake disc; 56. Connecting plate; 57. First bearing; 58. Second bearing; 59. Second gear; 510. Third gear; 511. Fixed disc; 512. Stirring rod; 6. Special-shaped scraper. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] See also Figure 1-Figure 5 The present invention provides a technical solution: a fermentation tank with enhanced stirring and anti-sedimentation, comprising a tank body 1, three groups of brackets 2 fixedly connected to the outer wall of the tank body 1 at equal intervals, a tank cover 3 fixedly connected to the top of the tank body 1 through a flange, a discharge port 4 fixedly connected to the bottom surface of the tank body 1, the discharge port 4 is connected to the interior of the tank body 1, and a mixing component 5 for stirring the material is provided in the tank cover 3 and the tank body 1.

[0025] like Figure 1 and Figure 4 as well as Figure 5As shown, the mixing assembly 5 includes a support plate 51 fixedly connected to the top surface of the tank cover 3, a motor 52 is fixedly connected to the top surface of the support plate 51, the output shaft of the motor 52 passes through the tank cover 3, a stirring blade 53 is fixedly connected to the output shaft of the motor 52, a first gear 54 is fixedly connected to the end surface of the tank cover 3 facing the inner wall of the tank body 1, and the stirring blade 53 rotates in the first gear 54, a brake disc 55 is fixedly connected to the output shaft of the stirring blade 53 below the first gear 54, and four groups of connecting plates 56 are fixedly connected to the outer wall of the brake disc 55 at equal intervals, and the four groups of connecting plates 56 have first bearings 57 built in. A second bearing 58 is built into the surface of the connecting plate 56 on the side of the first bearing 57 facing the brake disc 55. The upper and lower end surfaces of the four groups of second bearings 58 are fixedly connected to two groups of second gears 59. A group of second gears 59 at the upper end of the four groups of connecting plates 56 are meshed with the first gear 54. The top surfaces of the four groups of first bearings 57 are fixedly connected to the third gear 510. The four groups of third gears 510 are meshed with another group of second bearings 58 below the connecting plate 56. The bottom surfaces of the four groups of third gears 510 are fixedly connected to a fixed plate 511. The bottom surfaces of the four groups of fixed plates 511 are fixedly connected to multiple groups of stirring rods 512.

[0026] The motor 52 drives the brake disc 55 to rotate, so that the second gear 59 on the brake disc 55 cooperates with the first gear 54 and rotates around the outer ring of the first gear 54. At the same time, the second gear 59 drives the third gear 510 to rotate through another set of second gears 59, and then drives the fixed disc 511 and the stirring rod 512 to rotate through the third gear 510, so that the four sets of fixed discs 511 and the stirring rod 512 stir the material in the tank body 1. At the same time, the stirring blade 53 is used to increase the stirring range, increase the flow speed of the material in the tank body 1, keep the material in a flowing state at all times, and prevent the bottom of the tank body 1 from forming a stirring "blind spot". This solves the problem that insufficient stirring will cause solid particles in the fermentation raw materials to precipitate, destroy the uniformity of the product, and affect the taste and appearance.

[0027] like Figure 4 As shown, four groups of fixed disks 511 are provided, and the four groups of fixed disks 511 are fixedly connected to the bottom surface of the third gear 510 at equal intervals. Four groups of stirring rods 512 are provided, and the four groups of stirring rods 512 are all cylindrical in design. The four groups of stirring rods 512 are arranged on the bottom surface of the fixed disk 511 at equal intervals, which can increase the stirring range and stirring effect of the stirring rods 512, form multiple stirring areas, and cover materials of different radii and depths. The stirring rods 512 close to the tank wall can push the edge material to flow to the center, and the stirring rods 512 in the center area can avoid local material accumulation, so that the culture medium, bacteria, nutrients, etc. are evenly distributed in the tank, reducing the concentration gradient difference.

[0028] like Figure 4As shown, the input end of the motor 52 is electrically connected to the controller through a wire, and a placement box for storing the controller is provided on the outer wall of the tank body 1. The controller can send an electrical signal to the motor 52 through the wire to accurately adjust the speed, torque or direction of the motor 52. Integrating the controller into the placement box on the tank wall can save floor space in the workshop, which is especially suitable for densely arranged scenarios of large fermentation tanks to avoid external control cabinets occupying too many channels.

[0029] like Figure 2 As shown, a sealing ring is provided between the tank body 1 and the tank cover 3, and the sealing ring is embedded in the bottom surface of the tank cover 3. The sealing ring fills the gap between the contact surfaces of the tank body 1 and the tank cover 3 through elastic deformation, forming a physical barrier to prevent oxygen from penetrating and maintain a strict anaerobic environment.

[0030] like Figure 3 and Figure 4 As shown, multiple groups of special-shaped scrapers 6 are fixedly connected to the bottom surface of the stirring blade 53 , and the outer walls of the multiple groups of special-shaped scrapers 6 are all in contact with the inner wall of the tank body 1 .

[0031] By fixing four groups of special-shaped scrapers 6 at the bottom of the stirring blade 53 and fitting the special-shaped scrapers 6 to the side walls and the inner wall of the bottom end of the tank body 1, the stirring blade 53 can synchronously drive the four groups of special-shaped scrapers 6 to rotate, and make the special-shaped scrapers 6 scrape the side walls and the inner wall of the bottom end of the tank body 1 to prevent the material from settling on the inner wall of the bottom end of the tank body 1.

[0032] like Figure 4 As shown, the bottom end of the special-shaped scraper 6 is fitted with the inner wall of the bottom end of the tank body 1. Four groups of special-shaped scrapers 6 are provided. The four groups of special-shaped scrapers 6 are fixedly connected to the outer wall of the stirring blade 53 at equal intervals. The four groups of special-shaped scrapers 6 are all designed in an arc shape. The stirring blade 53 can synchronously drive the four groups of special-shaped scrapers 6 to rotate, so that the four groups of special-shaped scrapers 6 can scrape the inner wall and side wall of the bottom end of the tank body 1 to prevent the accumulation of materials on the inner wall of the tank body 1, causing the materials to precipitate and affect the fermentation effect.

[0033] The method of use and working principle of this device: When in use, the controller starts the motor 52, so that the motor 52 drives the stirring blade 53 to rotate, and at the same time, the motor 52 synchronously drives the brake disc 55 to rotate, so that the second gear 59 on the brake disc 55 cooperates with the first gear 54 and rotates around the outer ring of the first gear 54, and at the same time, the second gear 59 drives the third gear 510 to rotate through another set of second gears 59, and then drives the fixed plate 511 and the stirring rod 512 to rotate through the third gear 510, so that the four sets of fixed plates 511 and the stirring rod 512 stir the material in the tank body 1, and at the same time, with the stirring blade 53, the purpose of increasing the stirring range is achieved, and the flow speed of the material in the tank body 1 is increased, so that the material is always in a flowing state, and the bottom end of the tank body 1 is not easily formed with a stirring "blind spot", thereby solving the problem that insufficient stirring causes solid particles in the fermentation raw materials to precipitate, destroys the uniformity of the product, and affects the taste and appearance.

[0034] A method for using a fermentation tank with enhanced stirring and anti-sedimentation is as follows: S1. Place the tank body 1 stably with three sets of brackets 2 to ensure that it is level. The embedded sealing ring at the bottom of the tank cover 3 fits with the top of the tank body 1. The tank cover 3 is fixed by a flange to form a sealed environment. Fermentation raw materials are added into the tank body from the top opening of the tank cover 3 to ensure that the amount of material does not exceed a reasonable range of the tank body volume.

[0035] S2. Turn on the controller power supply and start the motor 52 through the controller. The output shaft of the motor 52 drives the stirring blade 53 to rotate in the first gear 54. At the same time, the brake disc 55 at the lower end of the motor output shaft starts to rotate.

[0036] S3, the four groups of connecting plates 56 on the outer wall of the brake disc 55 rotate with the brake disc, and the second gear 59 on the connecting plate 56 engages with the first gear 54 fixed on the tank cover 3, so that the second gear 59 rotates around the outer ring of the first gear 54; The second gear 59 drives another set of second gears 59 to rotate through the second bearing 58, thereby driving the third gear 510 on the top of the first bearing 57 to rotate; The third gear 510 drives the fixed disk 511 and the four groups of cylindrical stirring rods 512 at the bottom to rotate. The four groups of fixed disks 511 simultaneously stir the material in the tank in multiple areas, and cooperate with the stirring blades 53 to expand the stirring range, accelerate the flow of materials, and avoid sedimentation.

[0037] S4, the four groups of arc-shaped scrapers 6 at the bottom of the stirring blade 53 rotate with the stirring blade, and their outer walls fit the inner wall of the tank body 1 to scrape the side wall and the inner wall of the bottom end of the tank body to prevent the material from adhering to the sediment. S5. After the fermentation is finished, the motor 52 is turned off by the controller, and the discharge port 4 at the bottom of the tank body 1 is opened to discharge the material through the discharge port, thereby completing the unloading.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other form. Any person skilled in the art may use the technical contents disclosed above to change or modify them into equivalent embodiments with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiments made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A fermentation tank with enhanced stirring and anti-sedimentation, comprising a tank body (1), characterized in that: Three groups of brackets (2) are fixedly connected to the outer wall of the tank body (1) at equal intervals, a tank cover (3) is fixedly connected to the top of the tank body (1) via a flange, a discharge port (4) is fixedly connected to the bottom surface of the tank body (1), and the discharge port (4) is communicated with the interior of the tank body (1), and a mixing assembly (5) for stirring the material is provided in the tank cover (3) and the tank body (1).

2. The fermentation tank with enhanced stirring and anti-sedimentation according to claim 1, characterized in that: The mixing assembly (5) includes a support plate (51) fixedly connected to the top surface of the tank cover (3), a motor (52) fixedly connected to the top surface of the support plate (51), an output shaft of the motor (52) passing through the tank cover (3), a stirring blade (53) fixedly connected to the output shaft of the motor (52), a first gear (54) fixedly connected to the surface of one end of the tank cover (3) facing the inner wall of the tank body (1), and the stirring blade (53) rotates in the first gear (54), a brake disc (55) fixedly connected to the output shaft of the stirring blade (53) below the first gear (54), four groups of connecting plates (56) fixedly connected to the outer wall of the brake disc (55) at equal intervals, and the four groups of connecting plates (56) are built with first bearings (57). The four groups of first bearings (57) are each provided with a second bearing (58) built into the surface of a connecting plate (56) on one side facing the brake disc (55); the upper and lower end surfaces of the four groups of second bearings (58) are each fixedly connected to two groups of second gears (59); a group of second gears (59) at the upper end of the four groups of connecting plates (56) is meshed with the first gear (54); the top end surfaces of the four groups of first bearings (57) are each fixedly connected to a third gear (510); the four groups of third gears (510) are each meshed with another group of second bearings (58) below the connecting plate (56); the bottom end surfaces of the four groups of third gears (510) are each fixedly connected to a fixed disc (511); and the bottom end surfaces of the four groups of fixed discs (511) are each fixedly connected to a plurality of stirring rods (512).

3. The fermentation tank with enhanced stirring and anti-sedimentation according to claim 2, characterized in that: Four groups of stirring rods (512) are provided, and the four groups of stirring rods (512) are all cylindrical in design, and the four groups of stirring rods (512) are arranged at equal intervals on the bottom surface of the fixed plate (511).

4. The fermentation tank with enhanced stirring and anti-sedimentation according to claim 2, characterized in that: The input end of the motor (52) is electrically connected to the controller via a wire, and a placement box for storing the controller is provided on the outer wall of the tank (1).

5. The fermentation tank with enhanced stirring and anti-sedimentation according to claim 1, characterized in that: A sealing ring is provided between the tank body (1) and the tank cover (3), and the sealing ring is designed to be embedded on the bottom surface of the tank cover (3).

6. The fermentation tank with enhanced stirring and anti-sedimentation according to claim 2, characterized in that: The bottom end surface of the stirring blade (53) is fixedly connected to a plurality of groups of special-shaped scrapers (6), and the outer walls of the plurality of groups of special-shaped scrapers (6) are all in contact with the inner wall of the tank body (1).

7. The fermentation tank with enhanced stirring and anti-sedimentation according to claim 6, characterized in that: Four groups of the special-shaped scrapers (6) are provided. The four groups of special-shaped scrapers (6) are fixedly connected to the outer wall of the stirring blade (53) at equal intervals. The four groups of special-shaped scrapers (6) are designed in an arc shape.

8. The fermentation tank with enhanced stirring and anti-sedimentation according to claim 6, characterized in that: The bottom end of the special-shaped scraper (6) is in contact with the inner wall of the bottom end of the tank body (1).

9. The fermentation tank with enhanced stirring and anti-sedimentation according to claim 2, characterized in that: Four groups of fixed disks (511) are provided, and the four groups of fixed disks (511) are fixedly connected to the bottom end surface of the third gear (510) at equal intervals.

10. The method for using the fermentation tank with enhanced stirring and anti-sedimentation according to any one of claims 1 to 9, characterized in that: S1. Place the tank body (1) stably through three sets of brackets (2) to ensure that it is level. Fit the embedded sealing ring at the bottom end of the tank cover (3) to the top end of the tank body (1). Fix the tank cover (3) through the flange to form a sealed environment. Add fermentation raw materials into the tank body through the top opening of the tank cover (3), ensuring that the amount of materials does not exceed the reasonable range of the tank body volume; S2, turning on the controller power supply, starting the motor (52) through the controller, the output shaft of the motor (52) drives the stirring blade (53) to rotate in the first gear (54), and at the same time, the brake disc (55) at the lower end of the motor output shaft starts to rotate; S3, the four groups of connecting plates (56) on the outer wall of the brake disc (55) rotate with the brake disc, and the second gear (59) on the connecting plate (56) is engaged with the first gear (54) fixed on the tank cover (3), so that the second gear (59) rotates around the outer ring of the first gear (54); The second gear (59) drives another set of second gears (59) to rotate through the second bearing (58), thereby driving the third gear (510) at the top of the first bearing (57) to rotate; The third gear (510) drives the fixed disk (511) and the four sets of cylindrical stirring rods (512) at the bottom to rotate. The four sets of fixed disks (511) simultaneously stir the material in the tank in multiple areas, and cooperate with the stirring blades (53) to expand the stirring range, accelerate the flow of the material, and avoid sedimentation. S4, four groups of arc-shaped scrapers (6) at the bottom of the stirring blade (53) rotate with the stirring blade, and their outer walls are in contact with the inner wall of the tank body (1), scraping the side walls and the inner wall of the bottom end of the tank body to prevent the material from adhering to the sediment; S5. After the fermentation is completed, the motor (52) is turned off by the controller, and the discharge port (4) at the bottom of the tank (1) is opened to discharge the material through the discharge port, thereby completing the unloading.