Stirring device of fermentation tank and horizontal fermentation tank

Abstract

The invention relates to the technical field of bioengineering equipment, aims to solve the problem of potential safety hazards caused by non-uniform fermentation liquid pressure, low mixing efficiency and center-of-gravity shift of a stirring device of a horizontal fermentation tank in the prior art, and provides a stirring device of a fermentation tank and the horizontal fermentation tank. The stirring component is contained in the fermentation tank, one end of the stirring component penetrates through the fermentation tank and is connected with the driving assembly, and the stirring component is arranged in the direction parallel to the axis of the fermentation tank; at least one end of the rotating shaft is rotatably and hermetically connected with the fermentation tank; the stirring groups are distributed at intervals in the axial direction of the rotating shaft, and the plane where the stirring groups are located is perpendicular to the rotating shaft; the stirring group comprises at least two stirring pieces, and each stirring piece is provided with a stirring surface and a pushing surface which are connected with each other and form an acute angle. The device has the beneficial effects that uniform mixing and directional pushing of fermentation liquor are guaranteed, the pressure in the tank is balanced, center-of-gravity shift is prevented, and the safety risk is reduced.

Description

Technical Field

[0001] This invention relates to the field of bioengineering equipment technology, and more specifically, to a stirring device for a fermenter and a horizontal fermenter. Background Technology

[0002] In fields such as bio-fermentation, food processing, and pharmaceutical production, fermenters are core equipment, and the design of their stirring devices directly affects fermentation efficiency and production safety. The core function of the stirring device is to achieve uniform mixing of the fermentation broth and new materials, ensuring a stable fermentation environment and thus improving fermentation efficiency. In vertical fermenters, the working mode of the stirring device is relatively mature: when the stirring device rotates, it usually drives the fermentation broth upward. Under the action of gravity, the driven fermentation broth naturally falls back, forming a circulation and mixing of the fermentation broth at the bottom and top of the tank, effectively avoiding the problems of local material accumulation or uneven mixing.

[0003] However, with the expansion of fermentation scale, horizontal fermenters have gradually been applied to large-scale fermentation scenarios due to their advantages such as high volume utilization and convenient operation. Currently, most horizontal fermenters on the market use auger-shaped or fan-shaped stirring devices, which are horizontally arranged inside the tank. However, in actual operation, this structure has significant defects. Due to the rotational characteristics of the auger-shaped or fan-shaped device, it continuously drives the fermentation liquid to move unidirectionally laterally along the tank axis during operation. On the one hand, this causes the fermentation liquid to continuously accumulate at one end of the tank, putting great pressure on the tank wall at that end. This results in a severely uneven pressure distribution of the fermentation liquid inside the tank, making it difficult for newly added materials to diffuse quickly and mix fully with the fermentation liquid, directly affecting fermentation efficiency and quality. On the other hand, the fermentation volume of horizontal fermenters is usually large. When the fermentation liquid tilts and accumulates at one end for a long time due to stirring, it will cause a serious shift in the center of gravity of the tank, greatly increasing the load on the fermenter support device. This not only shortens the service life of the equipment but also poses safety hazards such as support structure failure, tank tilting, or even overturning, which seriously threatens production safety.

[0004] Therefore, in order to address the problems of uneven fermentation broth pressure, inefficient mixing, and center of gravity shift caused by the existing stirring devices in horizontal fermenters, it is urgent to optimize the structure and working mode of the stirring devices in order to improve the operational stability, fermentation efficiency, and production safety of horizontal fermenters. Summary of the Invention

[0005] The present invention aims to provide a stirring device for a fermenter and a horizontal fermenter to solve the safety hazards caused by uneven fermentation liquid pressure, inefficient mixing and center of gravity shift in the existing horizontal fermenter stirring device.

[0006] The embodiments of the present invention are implemented as follows: This invention provides a fermentation tank stirring device, which includes a fermentation tank and a stirring component; The stirring component is housed inside the fermentation tank, and one end passes through the fermentation tank and is connected to the drive assembly. The stirring component is arranged in a direction parallel to the axis of the fermentation tank. The aforementioned stirring component has a rotating shaft, at least one end of which is rotatably and sealingly connected to the fermentation tank; The aforementioned stirring component also includes a plurality of stirring groups connected to the aforementioned rotating shaft. The stirring groups are spaced apart along the axial direction of the aforementioned rotating shaft, and the plane in which the stirring groups are located is perpendicular to the aforementioned rotating shaft. The aforementioned mixing assembly includes at least two mixing components, each comprising a stirring surface and a pushing surface, wherein the stirring surface and the pushing surface are connected and arranged at an acute angle.

[0007] In use, several of the above-mentioned stirring components are fixed radially along the above-mentioned rotating shaft to form several of the above-mentioned stirring groups. Multiple of the above-mentioned stirring groups are arranged at intervals on the above-mentioned rotating shaft to form a complete stirring component. The stirring groups are driven to rotate by the above-mentioned rotating shaft. The stirring components with right-angled triangular cross sections achieve uniform mixing and directional pushing of the fermentation liquid when rotating in both directions, effectively balancing the pressure inside the tank and avoiding the center of gravity shift.

[0008] The fermenter stirring device disclosed in this embodiment, by incorporating the aforementioned stirring components, achieves uniform mixing and directional propulsion of the fermentation liquid. This effectively balances the pressure within the tank and prevents the center of gravity from shifting. Consequently, the fermenter stirring device possesses the beneficial effects of ensuring uniform mixing and directional propulsion of the fermentation liquid, balancing the pressure within the tank, preventing the center of gravity from shifting, and reducing safety risks.

[0009] Optionally, the aforementioned stirring components are all fixedly connected to the outer wall of the aforementioned rotating shaft along the radial direction of the shaft.

[0010] This configuration ensures that the aforementioned stirring components are evenly distributed radially along the aforementioned rotating shaft, resulting in a stable and balanced force distribution. The stirring range can fully cover the radial cross-section of the fermenter, preventing local accumulation of fermentation liquid or pressure concentration, thereby improving the uniformity of stirring and the safety of equipment operation.

[0011] Optionally, the stirring element has a straight surface, which is connected to the stirring surface and the pushing surface respectively, and the straight surface is parallel to the plane in which the stirring assembly rotates.

[0012] This configuration prevents the straight surface from pushing the fermentation liquid during forward and reverse stirring, ensuring that the straight surface of the stirring component coincides with the plane of rotation of the stirring group. This precisely isolates non-functional pushing action, preventing the fermentation liquid from shifting or becoming unevenly pressured due to additional thrust during forward stirring. At the same time, it prevents interference with the directional pushing effect of the pushing surface during reverse stirring, ensuring that the forward and reverse stirring functions are focused and efficient, and improving mixing uniformity and drainage stability.

[0013] Optionally: When the stirring member rotates in the forward direction, the stirring surface is located in front of the stirring assembly; When the stirring component rotates in the opposite direction, the pushing surface is located in front of the stirring assembly.

[0014] This configuration, by clearly defining the positions and connections of the stirring surface and the pushing surface, achieves precise zoning of the stirring components' functions. During forward stirring, the stirring surface takes priority and is perpendicular to the straight surface, efficiently stirring the fermentation broth to achieve uniform mixing and avoiding the displacement of the fermentation broth caused by additional thrust. During reverse stirring, the inclined pushing surface precisely receives the force, forming a reasonable thrust angle through its connection with the straight surface and the far end of the stirring surface, directionally pushing the fermentation broth to gather at the drain port, improving drainage efficiency. At the same time, the independent design of the stirring surface and the pushing surface avoids functional interference during forward and reverse stirring, ensuring that the mixing and drainage functions are focused, stable, and efficient.

[0015] Optionally, the angle between the agitating surface and the pushing surface is greater than 50°.

[0016] This configuration ensures clear functional boundaries between adjacent stirring surfaces. During forward stirring, the stirring surfaces cut into the fermentation broth at an appropriate angle, efficiently transferring stirring kinetic energy through the structural characteristics perpendicular to the straight surfaces. This avoids excessive stirring force or interference with the pushing surfaces due to excessively small angles. During reverse stirring, the inclined pushing surfaces form an effective thrust gradient due to sufficient angles, enhancing the directional pushing ability of the fermentation broth. This avoids thrust dispersion and reduced drainage efficiency due to excessively small angles. This angle design further optimizes the functional specificity of forward and reverse stirring, improving the stability of mixing uniformity and drainage efficiency.

[0017] Optionally, the stirring assembly is evenly distributed in the axial direction of the rotating shaft.

[0018] This configuration ensures that the stirring groups form a continuous, seamless coverage area along the axial direction of the tank, preventing over-stirring due to dense concentration of the stirring groups or blind spots due to uneven spacing. This ensures that the fermentation liquid at different axial positions within the tank is fully mixed. Simultaneously, the uniform distribution balances the overall force on the rotating shaft, reducing vibration or wear caused by concentrated local loads and improving the stability and service life of the stirring components.

[0019] Optionally, the distance between adjacent mixing units is 60cm to 80cm.

[0020] This configuration allows for reasonable coverage and synergistic effect of the stirring range. On the one hand, the spacing ensures that each stirring group forms a continuous and non-overlapping stirring area in the axial direction of the fermenter, avoiding local over-stirring or blind spots, and ensuring uniform mixing of the fermentation broth throughout the entire length of the fermenter. On the other hand, the appropriate spacing balances the overall load of the stirring components, reducing the energy consumption increase caused by overly dense stirring groups, while avoiding a decrease in mixing efficiency caused by excessive spacing. This design further optimizes the uniformity of axial stirring and improves the stability of the fermentation effect.

[0021] Optionally, the rotation radius of the above-mentioned stirring component is one-half to two-thirds of the radius of the fermentation tank.

[0022] This setup helps balance mixing efficiency and stability, covers the core area to reduce dead zones, and promotes uniform mixing and flow of the fermentation broth.

[0023] Optionally, the stirring component further includes reinforcing ribs, which are disposed on the stirring surface and connect the rotating shaft to the stirring component.

[0024] With this configuration, the reinforcing ribs can effectively disperse the stress at the connection between the agitator and the shaft, significantly improve the connection strength and structural stability between the agitator and the shaft, prevent loosening or breakage of the connection due to excessive force during the agitation process, ensure the long-term stable operation of the agitator, and extend the service life of the equipment.

[0025] Optionally: The fermenter is provided with an inlet pipe at the top of the end near the motor, and an inlet valve is provided on the inlet pipe.

[0026] With this configuration, the inlet pipe is located at the top of the fermenter near the motor. Combined with the inlet valve, it allows for precise control of the timing and flow rate of initial materials (such as inoculum, pre-fermentation broth, etc.), facilitating flexible adjustment of the feed rate according to fermentation process requirements. The top-mounted design prevents direct collision between the material and the stirring components during input, reducing splashing losses. It also facilitates connection with external feeding systems, improving the convenience and controllability of feeding operations and ensuring accurate and stable material delivery in the initial stage of fermentation.

[0027] Optionally, a drain pipe is provided at the end of the fermenter away from the motor, and a drain valve is provided on the drain pipe.

[0028] With this configuration, the drain pipe is located at the end of the fermenter furthest from the motor. Combined with the drain valve, this allows for precise control of the timing and rate of liquid discharge after fermentation. The location away from the motor works in conjunction with the directional pushing function of the pushing surface during reverse stirring, facilitating the accumulation of fermentation broth towards the drain end under reverse stirring, thus improving drainage efficiency. The drain valve enables flexible start / stop and flow control during the drainage process, preventing uncontrolled drainage. It also facilitates connection to external collection systems, enhancing the safety and convenience of drainage operations and ensuring efficient and stable recovery of materials after fermentation.

[0029] Optionally, each of the above-mentioned mixing units consists of two mixing components, preferably four.

[0030] This configuration allows for balanced mixing forces through symmetrical distribution, avoiding vibration or wear caused by uneven weight distribution on one side. When four of the above-mentioned mixing components are selected, the mixing area can be further refined, improving the radial mixing uniformity of the fermentation liquid. At the same time, it takes into account both lightweight structure and mixing efficiency, ensuring thorough mixing during forward mixing and balanced thrust during reverse mixing, thus guaranteeing stable equipment operation and consistent fermentation results.

[0031] Optionally, both ends of the aforementioned rotating shaft pass through the fermenter and are rotatably and sealed along the axial direction of the fermenter.

[0032] This configuration ensures that the stirring components are always positioned on the axis of the fermenter, effectively preventing any deviation or displacement of the stirring components and ensuring uniform mixing.

[0033] Optionally, the drive component is a motor or a motor assembly, with the output shaft of the motor or the output end of the motor assembly connected to the aforementioned rotating shaft. A motor is the preferred drive component.

[0034] This configuration enables the motor or motor unit to drive the rotating shaft, thereby achieving the mixing and directional pushing of the fermentation broth by the stirring device.

[0035] A horizontal fermenter includes the aforementioned fermenter stirring device; both the fermenter and the stirring component are arranged horizontally, and the stirring component can rotate in a sealed manner along the horizontal axis of the fermenter; there are at least two fermenters arranged side by side with intervals between them.

[0036] With this configuration, both the fermenter and the stirring components are arranged horizontally, and the stirring components rotate in a sealed manner along the horizontal axis of the fermenter. This not only ensures the space utilization of the horizontal layout, but also isolates external impurities and prevents leakage of fermentation liquid through the sealing design, ensuring a clean fermentation environment. At the same time, at least two fermenters are arranged side by side with intervals, which can realize simultaneous fermentation of multiple batches to improve production efficiency. It can also avoid mutual force interference between tanks, distribute the load on the supporting structure, reduce the chain reaction of single tank center of gravity shift, and ultimately balance the stability of the fermentation environment, production efficiency and equipment operation safety.

[0037] In summary, the stirring device and horizontal fermenter disclosed in this invention have the beneficial effects of ensuring uniform mixing and directional delivery of fermentation liquid, balancing the pressure inside the tank, preventing center of gravity shift, and reducing safety risks. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the forward rotation of the fermentation tank stirring device in this invention; Figure 2 For the present invention Figure 1 A schematic diagram of the mixing unit.

[0040] Icons: 1-Stirring component, 2-Rotating shaft, 3-Stirring group, 4-Stirring piece, 5-Straight surface, 6-Agitating surface, 7-Pushing surface, 8-Reinforcing rib, 9-Drive component. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0043] Example See Figure 1 and Figure 2 This embodiment proposes a fermenter stirring device, including a fermenter (not shown in the figure) and a stirring component 1; The stirring component 1 is housed inside the fermentation tank, and one end passes through the fermentation tank and is connected to the drive assembly 9. The stirring component 1 is arranged in a direction parallel to the axis of the fermentation tank. The stirring component 1 has a rotating shaft 2, at least one end of which is rotatably and sealed to the fermenter; The stirring component 1 also includes several stirring groups 3 connected to the rotating shaft 2. The stirring groups 3 are distributed at intervals along the axial direction of the rotating shaft 2, and the plane where the stirring groups 3 are located is perpendicular to the rotating shaft 2. The mixing assembly 3 includes at least two mixing components 4, each of which includes a stirring surface 6 and a pushing surface 7. The stirring surface 6 and the pushing surface 7 are connected and set at an acute angle.

[0044] In use, several stirring components 4 are fixed radially along the rotating shaft 2 to form several stirring groups 3. Multiple stirring groups 3 are arranged at intervals on the rotating shaft 2 to form a complete stirring component 1. The stirring group 3 is driven to rotate by the rotating shaft 2. The stirring components 4 with right-angled triangular cross sections achieve uniform mixing and directional pushing of the fermentation liquid when rotating in both directions, effectively balancing the pressure inside the tank and avoiding the center of gravity shift.

[0045] The fermenter stirring device disclosed in this embodiment, by setting up a stirring component 4, achieves uniform mixing and directional pushing of the fermentation liquid, which can effectively balance the pressure inside the tank and prevent the center of gravity from shifting. Thus, the fermenter stirring device has the beneficial effects of ensuring uniform mixing and directional pushing of the fermentation liquid, balancing the pressure inside the tank, preventing the center of gravity from shifting, and reducing safety risks.

[0046] See Figure 1 and Figure 2 All stirring components 4 are fixedly connected to the outer wall of the rotating shaft 2 along the radial direction of the rotating shaft 2. This ensures that several stirring components 4 are evenly distributed along the radial direction of the rotating shaft 2, and are subjected to balanced and stable forces. The stirring range can fully cover the radial cross section of the fermentation tank, avoiding local accumulation of fermentation liquid or pressure concentration, and improving the uniformity of stirring and the safety of equipment operation.

[0047] The stirring component 4 has a straight surface 5, which is connected to the stirring surface 6 and the pushing surface 7 respectively. The straight surface 5 is parallel to the plane of rotation of the stirring group 3. The straight surface 5 avoids pushing the fermentation liquid during forward and reverse stirring, ensuring that the straight surface 5 of the stirring component 4 coincides with the plane of rotation of the stirring group 3. This can accurately isolate non-functional pushing action, avoid the fermentation liquid from shifting or uneven pressure due to additional thrust during forward stirring, and at the same time prevent interference with the directional pushing effect of the pushing surface 7 during reverse stirring. This ensures that the forward and reverse stirring functions are dedicated and efficient, and improves the mixing uniformity and drainage stability.

[0048] It should be noted that forward rotation and reverse rotation only indicate that the direction of rotation of the shaft is different, and should not be used as a limitation.

[0049] See Figure 1 and Figure 2When the stirring component 1 rotates forward, the stirring surface 6 is located in front of the stirring group 3 to stir the liquid in the fermentation tank; when the stirring component 1 rotates in reverse, the pushing surface 7 is located in front of the stirring group 3 to push the liquid in the fermentation tank to move. By clearly defining the position and connection relationship between the stirring surface 6 and the pushing surface 7, the functions of the stirring component 4 are precisely divided. When stirring forward, the stirring surface 6 acts first and is perpendicular to the straight surface 5, which can efficiently stir the fermentation liquid to achieve uniform mixing and avoid the displacement of the fermentation liquid caused by additional thrust. When stirring in reverse, the inclined pushing surface 7 accurately bears the force and forms a reasonable thrust angle by connecting with the far end of the straight surface 5 and the stirring surface 6, which directionally pushes the fermentation liquid to gather at the drain port and improves the draining efficiency. At the same time, the independent design of the stirring surface 6 and the pushing surface 7 avoids functional interference during forward and reverse stirring, ensuring that the mixing and draining functions are dedicated, stable and efficient.

[0050] The angle between the stirring surface 6 and the pushing surface 7 is greater than 50°. This limitation ensures that the functional boundaries of the adjacent stirring groups 3 are clear. During forward stirring, the stirring surface 6 cuts into the fermentation liquid at an appropriate angle and efficiently transmits stirring kinetic energy through its structural characteristics perpendicular to the straight surface 5, avoiding insufficient stirring power or interference with the pushing surface 7 due to an angle that is too small. During reverse stirring, the inclined pushing surface 7 forms an effective thrust gradient due to a sufficient angle, enhancing the directional pushing ability of the fermentation liquid and avoiding the dispersion of thrust and decrease in drainage efficiency due to an angle that is too small. This angle design further optimizes the functional specificity of forward and reverse stirring and improves the stability of mixing uniformity and drainage efficiency.

[0051] See Figure 1 and Figure 2 The stirring group 3 is evenly distributed in the axial direction of the rotating shaft 2. This ensures that the stirring group 3 acts on the tank in the axial direction to form a continuous and dead-angle-free coverage area, avoiding over-stirring due to the dense concentration of stirring group 3 in some areas, or blind spots due to uneven spacing. This ensures that the fermentation liquid at different axial positions in the tank can be fully mixed. At the same time, the even distribution can balance the overall force on the rotating shaft 2, reduce the vibration or wear of the rotating shaft 2 caused by local load concentration, and improve the stability and service life of the stirring component 1.

[0052] The distance between adjacent stirring groups 3 is 60cm to 80cm, which can achieve reasonable coverage and synergistic effect of the stirring range. On the one hand, this spacing ensures that each stirring group 3 forms a continuous and non-overlapping stirring area in the axial direction of the fermenter, avoiding local over-stirring or stirring blind spots, and ensuring that the fermentation liquid is uniformly mixed throughout the entire length of the fermenter. On the other hand, an appropriate spacing can balance the overall load of the stirring components 1, reduce the increase in energy consumption caused by the stirring groups 3 being too dense, and at the same time avoid the decrease in mixing efficiency caused by excessive spacing. This design further optimizes the uniformity of axial stirring and improves the stability of fermentation effect.

[0053] See Figure 1 and Figure 2 The rotation radius of the stirring component 1 is one-half to two-thirds of the radius of the fermentation tank, which is conducive to balancing stirring efficiency and stability, covering the core area to reduce dead corners, and promoting uniform mixing and flow of fermentation liquid.

[0054] The stirring component 1 also includes a reinforcing rib 8, which is located on the stirring surface 6 and connects the rotating shaft 2 and the stirring component 4. The reinforcing rib 8 can effectively disperse the stress at the connection between the stirring component 4 and the rotating shaft 2, significantly improve the connection strength and structural stability between the stirring component 4 and the rotating shaft 2, avoid loosening or breakage of the connection due to excessive force during the stirring process, ensure the long-term stable operation of the stirring component 1, and extend the service life of the equipment.

[0055] It should be noted that the drive component 9 in this embodiment is a motor or a motor assembly, and the output shaft of the motor or the output end of the motor assembly is connected to the rotating shaft 2. This embodiment uses a motor; however, in other embodiments, a motor assembly can be used as needed, i.e., the motor and the rotating shaft 2 are connected via gears or chains. This is not a limitation.

[0056] See Figure 1 and Figure 2 The fermenter has an inlet pipe at the top of the end closest to the motor, with an inlet valve on it. The inlet pipe, located at the top of the end of the fermenter closest to the motor, can precisely control the timing and flow rate of initial materials (such as inoculum, pre-fermentation broth, etc.) input, allowing for flexible adjustment of the feed amount according to the fermentation process requirements. The top design prevents direct collision between the material input and the stirring component 1, reducing splashing losses. It also facilitates connection with external feeding systems, improving the convenience and controllability of the feeding operation and ensuring accurate and stable material input in the initial stage of fermentation.

[0057] A drain pipe with a drain valve is located at the end of the fermenter furthest from the motor. This location, combined with the drain valve, allows for precise control of the timing and rate of liquid discharge after fermentation. The motor-away design, along with the directional pushing function of the push surface 7 during reverse stirring, facilitates the accumulation of fermentation broth towards the drain end under reverse stirring, improving drainage efficiency. The drain valve enables flexible start / stop and flow control during drainage, preventing uncontrolled discharge and facilitating connection with external collection systems, enhancing the safety and convenience of drainage operations and ensuring efficient and stable recovery of post-fermentation materials.

[0058] See Figure 1 and Figure 2Each mixing group 3 has two mixing elements 4, preferably four. The symmetrical distribution can achieve balanced mixing force and avoid vibration or wear caused by uneven weight distribution on one side. When four mixing elements 4 are preferred, the mixing area can be further refined, the radial mixing uniformity of the fermentation liquid can be improved, and the lightweight structure and mixing efficiency can be taken into account. This ensures that the mixing is sufficient when mixing in the forward direction and the thrust is balanced when mixing in the reverse direction, thus ensuring stable operation of the equipment and consistent fermentation effect.

[0059] Both ends of the rotating shaft 2 pass through the fermentation tank and are rotatably and sealed along the axial direction of the fermentation tank. This ensures that the stirring component 1 is always on the axis of the fermentation tank, effectively preventing the stirring component 1 from deflecting or shifting, and ensuring the uniformity of stirring.

[0060] See Figure 1 and Figure 2 In this embodiment, the rotating shaft 2 is a metal cylinder, and several stirring components 4 are vertically welded to the outer wall of the rotating shaft 2.

[0061] See Figure 1 and Figure 2 In this embodiment, the reinforcing ribs 8 are all welded at the angle between the stirring component 4 and the rotating shaft 2.

[0062] See Figure 1 and Figure 2 In this embodiment, the stirring components 4 are all welded, riveted, bolted, or integrally formed on the outer wall of the rotating shaft 2 along the radial direction of the rotating shaft 2.

[0063] See Figure 1 and Figure 2 A horizontal fermenter includes a fermenter stirring device; both the fermenter and the stirring component 1 are horizontally arranged, and the stirring component 1 can rotate in a sealed manner along the horizontal axis of the fermenter. There are at least two fermenters arranged side by side with intervals between them. The horizontal arrangement of the fermenter and the stirring component 1, with the stirring component 1 rotating in a sealed manner along the horizontal axis of the fermenter, ensures the space utilization of the horizontal layout, isolates external impurities and prevents leakage of fermentation liquid through the sealing design, and ensures a clean fermentation environment. At the same time, the parallel and spaced arrangement of at least two fermenters can realize simultaneous fermentation of multiple batches to improve production efficiency, avoid mutual force interference between tanks, distribute the load of the supporting structure, reduce the chain reaction of single tank center of gravity shift, and ultimately balance the stability of the fermentation environment, production efficiency and equipment operation safety.

[0064] See Figure 1 and Figure 2 The specific operating principle of the stirring device and the horizontal fermenter in this embodiment is as follows: When it is necessary to stir the fermentation liquid in the fermentation tank, the drive component 9 is activated, which causes the drive component 9 to drive the stirring component 1 to rotate. In the stirring direction, the stirring surface 6 of the stirring component 4 contacts the fermentation liquid and stirs the fermentation liquid to mix, which is called forward stirring. When the fermentation broth has finished fermenting in the fermenter and needs to be discharged, the drive component 9 is activated and the stirring component 1 is rotated in the opposite direction. This causes the pushing surface 7 of the stirring component 4 to contact the fermentation broth in the stirring direction. Since the pushing surface 7 is inclined, it can push the fermentation broth, causing the fermentation broth to gather at the drain pipe, increasing the pressure and improving the efficiency of the discharge. This is called reverse stirring.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fermentation tank stirring device, characterized in that: Includes a fermenter and a stirring component (1); The stirring component (1) is housed inside the fermentation tank, and one end passes through the fermentation tank and is connected to the drive assembly (9). The stirring component (1) is arranged in a direction parallel to the axis of the fermentation tank. The stirring component (1) has a rotating shaft (2), at least one end of which is rotatably and sealed to the fermentation tank; The stirring component (1) further includes a plurality of stirring groups (3) connected to the rotating shaft (2). The stirring groups (3) are distributed at intervals along the axial direction of the rotating shaft (2), and the plane in which the stirring groups (3) are located is perpendicular to the rotating shaft (2). The stirring assembly (3) includes at least two stirring components (4), each stirring component (4) including a stirring surface (6) and a pushing surface (7), the stirring surface (6) and the pushing surface (7) being connected and arranged at an acute angle.

2. The fermentation tank stirring device according to claim 1, characterized in that: The stirring components (4) are all fixedly connected to the outer wall of the rotating shaft (2) along the radial direction of the rotating shaft (2).

3. The fermentation tank stirring device according to claim 1, characterized in that: The stirring component (4) has a straight surface (5), which is connected to the stirring surface (6) and the pushing surface (7) respectively. The straight surface (5) is parallel to the plane in which the stirring assembly (3) rotates.

4. The fermenter stirring device according to claim 1, characterized in that: When the stirring component (1) rotates in the forward direction, the stirring surface (6) is located in front of the stirring group (3); When the stirring component (1) rotates in the opposite direction, the pushing surface (7) is located in front of the stirring group (3).

5. The fermenter stirring device according to claim 1, characterized in that: The angle between the stirring surface (6) and the pushing surface (7) is greater than 50°.

6. The fermentation tank stirring device according to claim 1, characterized in that: The stirring group (3) is evenly distributed in the axial direction of the rotating shaft (2).

7. The fermenter stirring device according to claim 1, characterized in that: The distance between adjacent stirring groups (3) is 60cm to 80cm.

8. The fermenter stirring device according to claim 1, characterized in that: The rotation radius of the stirring component (1) is one-half to two-thirds of the radius of the fermentation tank.

9. The fermenter stirring device according to claim 1, characterized in that: The stirring component (1) further includes a reinforcing rib (8), which is disposed on the stirring surface (6) and connects the rotating shaft (2) to the stirring component (4).

10. A horizontal fermenter, comprising the fermenter stirring device according to any one of claims 1 to 9, characterized in that: Both the fermentation tank and the stirring component (1) are arranged horizontally. The stirring component (1) can rotate in a sealed manner along the horizontal axis of the fermentation tank. There are at least two fermentation tanks arranged side by side with intervals between them.

Images