A multi-layer stirred liquid fermentation tank

Abstract

This utility model discloses a multi-layer stirred liquid fermenter, including a stirred tank and a stirring unit. The stirred tank has at least three fermentation chambers, each with a fixed sleeve. The stirring unit is located inside the stirred tank and has a vertically rotating shaft inside. Stirring blades (a) are arranged on the side of the rotating shaft. A rotating ring is nested outside the rotating shaft, and stirring blades (b) are arranged on the side of the rotating ring. A conical tooth (b) is vertically rotating inside the fixed sleeve. The conical tooth (b) meshes with the rotating shaft and the rotating ring. By incorporating the stirring unit, this utility model allows the rotating shaft to rotate via a motor, causing the conical tooth (b) to rotate. The conical tooth (b) then drives the rotating ring to rotate in the opposite direction, thereby creating a counter-stirring effect through the stirring blades (a and b), improving the mixing uniformity and reaction efficiency of the fermentation broth.

Description

Technical Field

[0001] This utility model relates to the field of fermentation technology, specifically to a multi-layer stirred liquid fermenter. Background Technology

[0002] Fermentation refers to the process by which microorganisms, under aerobic or anaerobic conditions, produce the microbial cells themselves, or their direct or secondary metabolites. Generally, fermentation refers to a process by which organisms decompose organic matter. Multi-layer liquid fermenters are bioreactors used for large-scale liquid culture of microorganisms or cells, and are widely used in food, pharmaceutical, biofuel, and chemical industries (such as in the production of soy sauce, alcohol, enzymes, and antibiotics). Their structure typically consists of multiple vertically arranged fermentation layers to improve space utilization and fermentation efficiency.

[0003] Existing multi-layer liquid fermenters generally adopt a single-axis unidirectional stirring structure. The single-axis unidirectional stirring forms a single axial or radial flow in each layer of the tank, resulting in fluid dead zones and low mixing efficiency of raw materials. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer stirred liquid fermenter to solve the problem mentioned in the background art that the existing multi-layer liquid fermenters generally adopt a single-axis unidirectional stirring structure. The single-axis unidirectional stirring forms a single axial or radial flow in each layer of the tank, resulting in a fluid dead zone and low mixing efficiency of raw materials.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer stirred liquid fermentation tank, comprising a stirred tank and a stirring unit:

[0006] The mixing tank has at least three fermentation chambers inside, each with a fixed sleeve. A stirring unit is located inside the mixing tank and has a vertically rotating shaft inside. Stirring blades a are located on the side of the rotating shaft, and a rotating ring is nested around the outside of the rotating shaft. Stirring blades b are located on the side of the rotating ring. A conical tooth b is vertically rotating inside the fixed sleeve, meshing with both the rotating shaft and the rotating ring. A motor is located at the top of the mixing tank, and its output is connected to the rotating shaft. Rotation of the rotating shaft drives the conical tooth b to rotate, causing the rotating ring to rotate in the opposite direction to the rotating shaft.

[0007] By adopting the above technical solution, when the rotating shaft is driven to rotate by the motor, it drives the bevel gear b to rotate, and then the bevel gear b drives the rotating ring to rotate in the opposite direction. This creates a reverse stirring effect through the stirring blades a and b, thereby improving the mixing uniformity and reaction efficiency of the fermentation broth.

[0008] Preferably, the mixing tank also has an inlet at the top of the mixing tank and an outlet at the bottom of the mixing tank. The three fermentation chambers are arranged vertically and are connected to each other by valves or pipes.

[0009] By adopting the above technical solution, materials can be fed in layers through the inlet, and gravity can be used to make the materials flow in three fermentation chambers in stages. The connection between the chambers can be controlled by valves or pipelines to achieve a staged or continuous fermentation process.

[0010] Preferably, the mixing tank also has two rotating grooves formed inside the fixed sleeve, which is set in the center of the fermentation chamber by a connecting rod, and the two conical teeth b are embedded in the two rotating grooves and rotatably connected to the fixed sleeve.

[0011] By adopting the above technical solution, it can be ensured that the bevel tooth b rotates stably in the rotating groove. The central positioning design of the fixed sleeve keeps the rotating shaft and rotating ring coaxial and reduces eccentric vibration.

[0012] Preferably, the stirring part also has a connecting hole opened inside the rotating ring, the rotating shaft passes vertically through the connecting hole and is rotatably connected to the rotating ring, and the top of the rotating ring is embedded in the bottom of the fixing sleeve and is rotatably connected to the fixing sleeve.

[0013] By adopting the above technical solution, the nested rotation of the rotating ring and the rotating shaft can be achieved through the connecting hole, while the rotational connection between the top of the rotating ring and the fixed sleeve further constrains its motion trajectory.

[0014] Preferably, the stirring part also has a ring of bevel teeth a disposed on the side of the rotating shaft, the bevel teeth a being engaged with two bevel teeth b.

[0015] By adopting the above technical solution, the power of the rotating shaft can be synchronously transmitted to two bevel teeth b through bevel tooth a, forming a symmetrical force transmission structure.

[0016] Preferably, the stirring part also has a conical tooth c disposed on the top of the rotating ring, which meshes with two conical teeth b.

[0017] By adopting the above technical solution, the rotation direction of the bevel tooth b can be reversed by the bevel tooth c, so that the rotating ring can rotate in the opposite direction to the rotation axis, thereby realizing the reverse motion of the stirring blade a and the stirring blade b.

[0018] Preferably, there are six stirring blades a, which are arranged in a central rotational symmetric structure around the axis of rotation, and there are six stirring blades b, which are also arranged in a central rotational symmetric structure around the axis of rotation. The rotation angle of the stirring blades a and b is the same.

[0019] By adopting the above technical solution, a uniform shear flow field can be formed by six symmetrically distributed stirring blades a and six stirring blades b, and the same angle design ensures that the fluid is in force balance during reverse stirring.

[0020] Compared with the prior art, the beneficial effects of this utility model are: by providing a stirring part, when the rotating shaft is driven to rotate by the motor, it drives the bevel tooth b to rotate, and then the bevel tooth b drives the rotating ring to rotate in the opposite direction, thereby generating a reverse stirring effect through the stirring blade a and stirring blade b, improving the mixing uniformity and reaction efficiency of the fermentation liquid. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this application;

[0022] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this application;

[0023] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this application;

[0024] Figure 4 This is a schematic diagram of the connection structure between the rotating shaft and the rotating ring in this application;

[0025] Figure 5 This is a schematic diagram of the cross-sectional structure of the mixing tank in this application;

[0026] Figure 6 This is a schematic diagram of the rotating ring structure of this application.

[0027] In the diagram: 1. Mixing tank; 101. Inlet; 102. Outlet; 103. Fermentation chamber; 104. Fixing sleeve; 105. Rotating trough; 2. Mixing section; 201. Rotating shaft; 202. Mixing blade a; 203. Conical tooth a; 204. Conical tooth b; 205. Rotating ring; 206. Connecting hole; 207. Conical tooth c; 208. Mixing blade b; 209. Motor. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] Please see Figure 1 , Figure 2 and Figure 3This embodiment provides a technical solution: a multi-layer stirred liquid fermentation tank, including a stirred tank 1 and a stirring unit 2.

[0031] The mixing tank 1 has at least three fermentation chambers 103 inside, and a fixing sleeve 104 is installed inside the fermentation chamber 103. A stirring part 2 is installed inside the mixing tank 1. The stirring part 2 has a vertically rotating shaft 201 installed inside the mixing tank 1. Stirring blades a202 are installed on the side of the rotating shaft 201. A rotating ring 205 is rotatably nested outside the rotating shaft 201. Stirring blades b208 are installed on the side of the rotating ring 205. A conical tooth b204 is vertically rotating inside the fixing sleeve 104. The conical tooth b204 meshes with the rotating shaft 201. 04 is engaged with the rotating ring 205. A motor 209 is installed on the top of the mixing tank 1. The output end of the motor 209 is connected to the rotating shaft 201. The rotation of the rotating shaft 201 drives the bevel gear b204 to rotate, thereby driving the rotating ring 205 to rotate in the opposite direction to the rotating shaft 201. When the rotating shaft 201 is driven to rotate by the motor 209, it drives the bevel gear b204 to rotate, and then the bevel gear b204 drives the rotating ring 205 to rotate in the opposite direction. This creates a reverse stirring effect through the stirring blades a202 and b208, improving the mixing uniformity and reaction efficiency of the fermentation liquid.

[0032] Example 2

[0033] Please see Figure 4 , Figure 5 and Figure 6 This embodiment provides a technical solution: a multi-layer stirred liquid fermenter, including a stirring section 2, a rotating shaft 201, and a rotating ring 205.

[0034] An inlet 101 is provided at the top of the mixing tank 1, and an outlet 102 is provided at the bottom of the mixing tank 1. Valves for opening and closing are provided inside the inlet 101 and the outlet 102. The three fermentation chambers 103 are arranged vertically and connected to each other by valves or pipes. Materials can be fed in layers through the inlet 101, and gravity is used to make the materials flow in the three fermentation chambers 103 step by step. The connection between the chambers is controlled by valves or pipes to realize the staged fermentation or continuous fermentation process.

[0035] Two rotating grooves 105 are provided inside the fixed sleeve 104. The fixed sleeve 104 is set in the center of the fermentation chamber 103 through a connecting rod. Two bevel teeth b204 are embedded in the two rotating grooves 105 and are rotatably connected to the fixed sleeve 104, which can ensure that the bevel teeth b204 rotate stably in the rotating grooves 105. The central positioning design of the fixed sleeve 104 keeps the rotating shaft 201 and the rotating ring 205 coaxial, reducing eccentric vibration.

[0036] A connecting hole 206 is vertically provided inside the rotating ring 205. The rotating shaft 201 passes vertically through the connecting hole 206 and is rotatably connected to the rotating ring 205. The top of the rotating ring 205 is embedded in the bottom of the fixing sleeve 104 and is rotatably connected to the fixing sleeve 104. The nested rotation of the rotating ring 205 and the rotating shaft 201 can be achieved through the connecting hole 206. At the same time, the rotational connection between the top of the rotating ring 205 and the fixing sleeve 104 further constrains its movement trajectory.

[0037] A ring of bevel teeth a203 is provided on the side of the rotating shaft 201. The bevel teeth a203 mesh with two bevel teeth b204. The power of the rotating shaft 201 can be synchronously transmitted to the two bevel teeth b204 through the bevel teeth a203, forming a symmetrical force transmission structure.

[0038] A bevel tooth c207 is provided at the top of the rotating ring 205. The bevel tooth c207 meshes with two bevel teeth b204. The rotation direction of the bevel teeth b204 can be reversed by the bevel tooth c207, so that the rotating ring 205 can rotate in the opposite direction to the rotating shaft 201, thereby realizing the reverse movement of the stirring blade a202 and the stirring blade b208.

[0039] There are six stirring blades a202, which are arranged in a central rotational symmetric structure around the axis of rotation 201. There are also six stirring blades b208, which are arranged in a central rotational symmetric structure around the axis of rotation 201. The rotation angle of stirring blades a202 and b208 is the same. A uniform shear flow field can be formed by the symmetrically distributed six stirring blades a202 and six stirring blades b208. The same angle design ensures that the fluid is in force balance during reverse stirring.

[0040] Working principle: First, the operator puts the raw materials into the mixing tank 1 through the feed inlet 101. According to the fermentation process requirements, the corresponding valve is opened to control the material to enter the corresponding fermentation chamber 103. Gravity causes the material to flow step by step in the three vertically arranged fermentation chambers 103. After the material is added, the motor 209 at the top of the mixing tank 1 is started. The motor 209 drives the rotating shaft 201 to start rotating. The bevel teeth a203 on the side of the rotating shaft 201 rotates accordingly. Since the bevel teeth a203 meshes with two bevel teeth b204, the bevel teeth a203 will synchronously transmit the power of the rotating shaft 201 to the two bevel teeth b204, so that the bevel teeth b204 rotate stably in the rotating groove 105 opened inside the fixed sleeve 104. The rotating bevel teeth b204 also mesh with the bevel teeth c207 at the top of the rotating ring 205, and the bevel teeth c207 change the rotation direction of the bevel teeth b204. The rotating ring 205 rotates in the opposite direction to the rotating shaft 201. The rotating ring 205, which is nested outside the rotating shaft 201, is nested with the rotating shaft 201 through the connecting hole 206. As the rotating shaft 201 and the rotating ring 205 rotate in opposite directions, the six centrally rotationally symmetrical stirring blades a202 on the side of the rotating shaft 201 and the six centrally rotationally symmetrical stirring blades b208 on the side of the rotating ring 205 also begin to rotate in the opposite direction. Since the rotation angle of stirring blades a202 is the same as that of stirring blades b208, they form a uniform shear flow field and ensure the fluid force balance during counter-stirring, avoiding the generation of local eddies or dead zones, thereby improving the mixing uniformity and reaction efficiency of the fermentation liquid. After fermentation is completed, the valve at the discharge port 102 is opened to discharge the fermented liquid from the stirring tank 1.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer stirred liquid fermentation tank, characterized in that, include: A mixing tank, the interior of which is provided with at least three fermentation chambers, and the interior of each fermentation chamber is provided with a fixing sleeve; The stirring section is located inside the stirring tank. The stirring section has a vertically rotating shaft inside the stirring tank. Stirring blades a are provided on the side of the rotating shaft. A rotating ring is nested outside the rotating shaft. Stirring blades b are provided on the side of the rotating ring. The fixed sleeve has a vertically rotating bevel tooth b inside, which meshes with the rotating shaft and the rotating ring. The top of the mixing tank is equipped with a motor, the output end of which is connected to the rotating shaft. The rotation of the rotating shaft drives the bevel tooth b to rotate, thereby driving the rotating ring to rotate in the opposite direction to the rotating shaft.

2. The multi-layer stirred liquid fermenter according to claim 1, characterized in that: The mixing tank also has a feed inlet at the top and a discharge outlet at the bottom. The three fermentation chambers are arranged vertically and connected to each other by valves or pipes.

3. The multi-layer stirred liquid fermentation tank according to claim 1, characterized in that: The mixing tank also has two rotating grooves formed inside a fixed sleeve, which is set in the center of the fermentation chamber by a connecting rod. The two conical teeth b are embedded in the two rotating grooves and are rotatably connected to the fixed sleeve.

4. A multi-layer stirred liquid fermentation tank according to claim 3, characterized in that: The stirring part also has a connection hole opened inside the rotating ring, through which the rotating shaft passes vertically and is rotatably connected to the rotating ring. The top of the rotating ring is embedded in the bottom of the fixed sleeve and is rotatably connected to the fixed sleeve.

5. A multi-layer stirred liquid fermentation tank according to claim 3, characterized in that: The stirring part also has a ring of bevel teeth a disposed on the side of the rotating shaft, which meshes with two bevel teeth b.

6. A multi-layer stirred liquid fermenter according to claim 5, characterized in that: The stirring part also has a conical tooth c located at the top of the rotating ring, which meshes with two conical teeth b.

7. A multi-layer stirred liquid fermenter according to claim 1, characterized in that: There are six stirring blades a, which are arranged in a central rotational symmetric structure around the axis of rotation. There are also six stirring blades b, which are arranged in a central rotational symmetric structure around the axis of rotation. The rotation angle of stirring blades a and stirring blades b are the same.

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