Biological fermentation culture device

Abstract

The utility model provides a biological fermentation culture device, which belongs to the technical field of fermentation culture, and comprises a tank body for accommodating fermentation liquor, an inner cavity and a stirring mechanism are arranged in the tank body, a defoaming mechanism is arranged on the inner wall of the tank body, the defoaming mechanism comprises a diversion trench and blades, and the diversion trench is communicated with the stirring mechanism. The flow guide groove is of an annular structure and is arranged in the circumferential direction of the inner wall of the tank body, the blades are connected with the flow guide groove through a rotating shaft, and bearings are arranged at the two ends of the rotating shaft; the impeller further comprises a blade angle adjusting mechanism, the blade angle adjusting mechanism is connected with rotating shafts of the blades, the multiple blades are distributed at equal intervals in the length direction of the flow guide groove, each blade is fixedly connected with the flow guide groove through the corresponding rotating shaft, and the section of the flow guide groove is in a U shape or a V shape. The biological fermentation culture device solves the problem of foam of a traditional biological fermentation culture device.

Description

Technical Field

[0001] The utility model belongs to the technical field of fermentation culture, and specifically relates to a biological fermentation culture device. Background Art

[0002] Bio-fermentation culture equipment is a kind of equipment specially used for microbial fermentation process, which is widely used in food industry, pharmaceutical industry, environmental protection industry, bio-energy and other fields. Such equipment usually includes tank, stirring system, ventilation device, temperature control system, pH control system and various sensors and controllers and other key components, aiming to provide a suitable growth environment for microorganisms and achieve efficient production of target products.

[0003] Although traditional biological fermentation culture devices have met the needs of large-scale industrial production to a certain extent, they still have some inherent disadvantages and limitations. First, the fermentation process is often accompanied by the generation of a large amount of foam, which is mainly due to the combined effects of factors such as microbial metabolism, ventilation and stirring, and certain additives (such as surfactants). Foam not only occupies the precious volume in the tank body, affecting the actual loading amount of the fermentation liquid, but may also cause the fermentation liquid to overflow, causing environmental pollution and equipment damage. More importantly, the foam layer will hinder the transfer of oxygen, affect the respiration of microorganisms, reduce the fermentation efficiency, and also have a negative impact on the efficiency of the stirring system and increase energy consumption. Traditional methods for dealing with foam problems mainly include chemical defoaming and physical defoaming. Chemical defoaming usually destroys the foam structure by adding defoamers, but defoamers may have an adverse effect on microbial growth and product properties, and it is difficult to accurately control the amount of addition, which is easy to cause secondary pollution. Physical defoaming mainly relies on static defoamers on the top of the tank body, such as baffles, overflow weirs, etc., which have limited defoaming effects and cannot be dynamically adjusted with the foam characteristics during the fermentation process. Utility Model Content

[0004] In view of this, the utility model provides a biological fermentation culture device, which solves the foam problem of traditional biological fermentation culture devices and realizes active and efficient reduction of foam in the fermentation process.

[0005] The utility model is achieved in this way:

[0006] The utility model provides a biological fermentation culture device, comprising a tank body for containing fermentation liquid, wherein an inner cavity and a stirring mechanism are arranged inside the tank body, wherein a defoaming mechanism is arranged on the inner wall of the tank body, and the defoaming mechanism comprises a guide groove and blades, wherein the guide groove is an annular structure, and the guide groove is arranged along the circumferential direction of the inner wall of the tank body, and the blades are connected to the guide groove through a rotating shaft, and bearings are arranged at both ends of the rotating shaft;

[0007] Wherein, it also includes a blade angle adjustment mechanism, and the blade angle adjustment mechanism is connected to the rotating shaft of the blade.

[0008] On the basis of the above technical solution, the biological fermentation culture device of the utility model can also be improved as follows:

[0009] Wherein, the cross section of the guide groove is U-shaped or V-shaped.

[0010] Furthermore, there are a plurality of blades which are evenly spaced along the length direction of the guide groove, and each blade is fixedly connected to the guide groove via the rotating shaft.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the defoaming blade is fixedly connected to a specific position inside the guide groove through a rotating shaft. The rotating shaft is made of high-strength, corrosion-resistant material, and one or both ends of the rotating shaft are embedded in the pre-designed shaft hole of the guide groove. In order to ensure that the blades can rotate smoothly, high-precision, low-friction bearings are installed at the shaft hole. The inner ring of the bearing is tightly sleeved on the rotating shaft, and the outer ring is fixed on the shaft hole wall of the guide groove, forming the basic support structure for the rotation of the blade. The selection of bearings should take into account the load-bearing capacity, running stability and service life to ensure good performance under long-term operation and possible cleaning and disinfection conditions.

[0012] Furthermore, the blade angle adjustment mechanism includes a stepper motor, a transmission gear set and an angle sensor, the output shaft of the stepper motor is coaxially connected to the input gear of the transmission gear set, the output gear of the transmission gear set is coaxially connected to the rotating shaft, and the angle sensor is fixed to the middle of the rotating shaft.

[0013] The stepper motor, the transmission gear set and the angle sensor are connected in sequence, wherein the output shaft of the stepper motor is coaxially connected to the input gear of the transmission gear set, the output gear of the transmission gear set is coaxially connected to the rotating shaft, and the angle sensor is fixed to one end or the middle of the rotating shaft to detect the actual rotation angle of the rotating shaft and the defoaming blade. The stepper motor drives the rotating shaft to rotate through the transmission gear set.

[0014] Furthermore, the adjustment angle range of the blade is 0° to 45°.

[0015] Furthermore, the edge of the blade is provided with a serrated structure, and the ratio of the edge linear velocity of the blade to the flow velocity of the fermentation liquid in the guide groove is 0.5 to 1.5.

[0016] Furthermore, the depth of the guide groove is 1 / 10 to 1 / 6 of the inner diameter of the tank body.

[0017] Furthermore, the ratio of the width of the guide groove to the inner diameter of the tank body is 1 / 20 to 1 / 10.

[0018] Furthermore, the rotating shaft and the bearing are fixed by interference fit or key connection.

[0019] The bearing is a deep groove ball bearing or a cylindrical roller bearing.

[0020] Furthermore, the guide groove is made of stainless steel with a thickness of 1 to 3 mm.

[0021] Compared with the prior art, the beneficial effects of the biological fermentation culture device provided by the utility model are:

[0022] Active defoaming to prevent overflow: The utility model has a built-in dynamic defoaming system, which can continuously and actively eliminate foam during the fermentation process, effectively avoiding the risk of overflow caused by foam accumulation, ensuring the cleanliness of the fermentation environment, and reducing the possibility of environmental pollution and equipment damage;

[0023] Strong adaptability and precise control: The defoaming blades are designed with adjustable angles, which can be adjusted according to the characteristics of foam generation rate, viscosity, stability, etc. at different stages of fermentation, thus improving the pertinence and effectiveness of the defoaming effect and enhancing the controllability of the fermentation process;

[0024] Improve stirring efficiency, save energy and reduce consumption: By breaking the foam with the defoaming blades, the foam layer reduces the obstruction of the stirring paddle working efficiency, reduces the stirring energy consumption, and is also beneficial to improve the dissolution and transfer efficiency of oxygen in the fermentation liquid, which is beneficial to the respiratory metabolism of microorganisms, thereby improving the overall fermentation efficiency;

[0025] Maintain a stable fermentation environment: The application of the defoaming system reduces the interference of foam on key parameters such as the fermentation liquid level, temperature, and pH, helps maintain the stability of the fermentation environment, is conducive to the normal growth of microorganisms and product synthesis, and improves product quality and yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is an example diagram of a biological fermentation culture device;

[0028] Figure 2 This is an enlarged view of part A;

[0029] Figure 3 It is a cross-sectional view of a guide channel of a first embodiment of a biological fermentation culture device;

[0030] Figure 4 It is a cross-sectional view of a guide channel of a second embodiment of a biological fermentation culture device;

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 10. Tank body; 20. Stirring mechanism; 30. Defoaming mechanism; 31. Guide groove; 32. Blade; 40. Blade angle adjustment mechanism. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the implementation mode of the present invention clearer, the technical solution in the implementation mode of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the implementation mode of the present invention.

[0034] like Figure 1 , Figure 2 As shown, it is a first embodiment of a biological fermentation culture device provided by the utility model. In this embodiment, it includes a tank body 10 for containing fermentation liquid, and an inner cavity and a stirring mechanism 20 are arranged inside the tank body 10, wherein a defoaming mechanism 30 is arranged on the inner wall of the tank body 10, and the defoaming mechanism 30 includes a guide groove 31 and blades 32. The guide groove 31 is an annular structure, and the guide groove 31 is arranged along the circumferential direction of the inner wall of the tank body 10. The blades 32 are connected to the guide groove 31 through a rotating shaft, and bearings are arranged at both ends of the rotating shaft;

[0035] The blade angle adjustment mechanism 40 is also included, and the blade angle adjustment mechanism 40 is connected to the rotation axis of the blade 32 .

[0036] When in use, the defoaming blade is usually connected to the rotating shaft by welding, key connection, threaded connection or interference fit. For example, a keyway can be designed in the center of the blade to match the key on the rotating shaft, and the torque is transmitted through the key to prevent the blade from slipping during rotation. Alternatively, the blade and the rotating shaft are connected by high-strength bolts to ensure a firm connection between the two through pre-tightening force.

[0037] like Figure 3 As shown, in the above technical solution, the cross section of the guide groove 31 is V-shaped.

[0038] Furthermore, in the above technical solution, there are multiple blades 32, which are evenly spaced along the length direction of the guide groove 31, and each blade 32 is fixedly connected to the guide groove 31 via a rotating shaft.

[0039] When in use, in order to prevent the blades from axially moving due to vibration or centrifugal force during rotation, an axial positioning structure is provided between the rotating shaft and the guide groove. This may include but is not limited to components such as stop washers, shaft shoulders, and locking nuts. For example, one end of the rotating shaft can be designed with a shaft shoulder, which cooperates with the step in the guide groove to limit the axial movement of the blades. Alternatively, a locking nut is used at the end of the rotating shaft to fix the blades axially by pre-tightening force. These positioning measures ensure that the blades always maintain the correct axial position during rotation and will not loosen or disengage axially.

[0040] Furthermore, in the above technical solution, the blade angle adjustment mechanism 40 includes a stepper motor, a transmission gear set and an angle sensor, the output shaft of the stepper motor is coaxially connected to the input gear of the transmission gear set, the output gear of the transmission gear set is coaxially connected to the rotating shaft, and the angle sensor is fixed to the middle of the rotating shaft.

[0041] When in use, the transmission gear set includes at least one pair of mutually meshing gears, and the gear tooth ratio is set according to the conversion relationship between the output speed of the stepper motor and the required defoaming blade speed to achieve effective transmission of the stepper motor speed to the defoaming blade speed.

[0042] The angle sensor is a photoelectric encoder or a magnetic encoder, and its sensing element is arranged opposite to the code disk or magnetic ring on the rotating shaft. By detecting the rotation angle change of the code disk or magnetic ring, the angle information of the defoaming blade is output in real time.

[0043] Furthermore, in the above technical solution, the adjustment angle range of the blade 32 is 0° to 45°.

[0044] When in use, the angle adjustment of the blade is achieved through a driving mechanism connected to the rotating shaft, including a stepper motor, a transmission gear set, etc. The stepper motor is directly or indirectly connected to the rotating shaft through a coupling, and the precise adjustment of the blade angle is achieved by accurately controlling the step angle of the motor. The transmission gear set is used to convert the torque and speed output by the motor into parameters suitable for the rotation of the blade. The angle sensor is installed on or near the rotating shaft to monitor the actual angle of the blade in real time and feed the data back to the control system to form a closed-loop control to ensure the accuracy of the blade angle adjustment.

[0045] Furthermore, in the above technical solution, the edge of the blade 32 is provided with a serrated structure, and the ratio of the edge linear velocity of the blade 32 to the flow velocity of the fermentation liquid in the guide groove 31 is 0.5 to 1.5.

[0046] Furthermore, in the above technical solution, the depth of the guide groove 31 is 1 / 10 to 1 / 6 of the inner diameter of the tank body 10 .

[0047] Furthermore, in the above technical solution, the ratio of the width of the guide groove 31 to the inner diameter of the tank body 10 is 1 / 20 to 1 / 10.

[0048] Furthermore, in the above technical solution, the rotating shaft and the bearing are fixed by interference fit or key connection.

[0049] Furthermore, in the above technical solution, the guide groove 31 is made of stainless steel with a thickness of 1 to 3 mm.

[0050] like Figure 1 , Figure 2 As shown, it is a second embodiment of a biological fermentation culture device provided by the utility model. In this embodiment, it includes a tank body 10 for containing fermentation liquid, and an inner cavity and a stirring mechanism 20 are arranged inside the tank body 10, wherein a defoaming mechanism 30 is arranged on the inner wall of the tank body 10, and the defoaming mechanism 30 includes a guide groove 31 and blades 32. The guide groove 31 is an annular structure, and the guide groove 31 is arranged along the circumferential direction of the inner wall of the tank body 10. The blades 32 are connected to the guide groove 31 through a rotating shaft, and bearings are arranged at both ends of the rotating shaft;

[0051] The blade angle adjustment mechanism 40 is also included, and the blade angle adjustment mechanism 40 is connected to the rotation axis of the blade 32 .

[0052] When in use, the defoaming blade is usually connected to the rotating shaft by welding, key connection, threaded connection or interference fit. For example, a keyway can be designed in the center of the blade to match the key on the rotating shaft, and the torque is transmitted through the key to prevent the blade from slipping during rotation. Alternatively, the blade and the rotating shaft are connected by high-strength bolts to ensure a firm connection between the two through pre-tightening force.

[0053] like Figure 4 As shown, in the above technical solution, the cross section of the guide groove 31 is U-shaped.

[0054] Furthermore, in the above technical solution, there are multiple blades 32, which are evenly spaced along the length direction of the guide groove 31, and each blade 32 is fixedly connected to the guide groove 31 via a rotating shaft.

[0055] Furthermore, in the above technical solution, the blade angle adjustment mechanism 40 includes a stepper motor, a transmission gear set and an angle sensor, the output shaft of the stepper motor is coaxially connected to the input gear of the transmission gear set, the output gear of the transmission gear set is coaxially connected to the rotating shaft, and the angle sensor is fixed to the middle of the rotating shaft.

[0056] The angle sensor is a photoelectric encoder or a magnetic encoder, and its sensing element is arranged opposite to the code disk or magnetic ring on the rotating shaft. By detecting the rotation angle change of the code disk or magnetic ring, the angle information of the defoaming blade is output in real time.

[0057] Furthermore, in the above technical solution, the adjustment angle range of the blade 32 is 0° to 45°.

[0058] Furthermore, in the above technical solution, the edge of the blade 32 is provided with a serrated structure, and the ratio of the edge linear velocity of the blade 32 to the flow velocity of the fermentation liquid in the guide groove 31 is 0.5 to 1.5.

[0059] Furthermore, in the above technical solution, the depth of the guide groove 31 is 1 / 10 to 1 / 6 of the inner diameter of the tank body 10 .

[0060] Furthermore, in the above technical solution, the ratio of the width of the guide groove 31 to the inner diameter of the tank body 10 is 1 / 20 to 1 / 10.

[0061] Furthermore, in the above technical solution, the rotating shaft and the bearing are fixed by interference fit or key connection.

[0062] Furthermore, in the above technical solution, the guide groove 31 is made of stainless steel with a thickness of 1 to 3 mm.

[0063] Specifically, the principle of the utility model is:

[0064] Design of annular guide groove: The annular guide groove is arranged along the inner wall of the tank, and its cross section is U-shaped or V-shaped, forming a continuous gas-liquid mixing channel. This design allows the fermentation liquid to circulate along the guide groove under stirring, and guides the foam generated on the surface of the fermentation liquid into the guide groove, creating conditions for subsequent defoaming treatment;

[0065] Adjustable angle defoaming blades: The defoaming blades are embedded in the guide groove and connected to the guide groove through a rotating shaft. Bearings are provided at both ends of the rotating shaft to allow the defoaming blades to rotate within a preset range. The ability to adjust the blade angle enables the device to be dynamically adjusted according to the foam characteristics during the fermentation process. For example, the blade angle can be increased during the stage of vigorous foam generation to enhance the defoaming effect; the blade angle can be reduced during the stage of less foam to reduce energy consumption.

[0066] Geometric parameters and kinematic characteristics of defoaming blades: The edge of the defoaming blade is provided with a serrated structure, and the ratio of its edge linear velocity to the flow velocity of the fermentation liquid in the guide groove is optimized to improve the efficiency of foam breaking. The choice of blade material, thickness design and connection method with the rotating shaft ensure the mechanical strength and durability of the blade during rotation.

Claims

1. A biological fermentation culture device, comprising a tank body (10) for containing a fermentation liquid, wherein the tank body (10) is provided with an inner cavity and a stirring mechanism (20), characterized in that: The inner wall of the tank body (10) is provided with a defoaming mechanism (30), the defoaming mechanism (30) comprising a guide groove (31) and a blade (32), the guide groove (31) being an annular structure, the guide groove (31) being arranged along the circumferential direction of the inner wall of the tank body (10), the blade (32) being connected to the guide groove (31) via a rotating shaft, and bearings being provided at both ends of the rotating shaft; It also includes a blade angle adjustment mechanism (40), and the blade angle adjustment mechanism (40) is connected to the rotation axis of the blade (32).

2. A biological fermentation culture device according to claim 1, characterized in that: The guide groove (31) has a U-shaped or V-shaped cross section.

3. A biological fermentation culture device according to claim 2, characterized in that: There are a plurality of blades (32) which are distributed at equal intervals along the length direction of the guide groove (31); each blade (32) is fixedly connected to the guide groove (31) via the rotating shaft.

4. A biological fermentation culture device according to claim 3, characterized in that: The blade angle adjustment mechanism (40) comprises a stepping motor, a transmission gear set and an angle sensor, wherein the output shaft of the stepping motor is coaxially connected to the input gear of the transmission gear set, the output gear of the transmission gear set is coaxially connected to the rotating shaft, and the angle sensor is fixed to the middle of the rotating shaft.

5. A biological fermentation culture device according to claim 4, characterized in that: The adjustment angle range of the blade (32) is 0° to 45°.

6. A biological fermentation culture device according to claim 5, characterized in that: The edge of the blade (32) is provided with a serrated structure, and the ratio of the edge linear velocity of the blade (32) to the flow velocity of the fermentation liquid in the guide groove (31) is 0.5 to 1.

5.

7. A biological fermentation culture device according to claim 6, characterized in that: The depth of the guide groove (31) is 1 / 10 to 1 / 6 of the inner diameter of the tank body (10).

8. A biological fermentation culture device according to claim 7, characterized in that: The ratio of the width of the guide groove (31) to the inner diameter of the tank body (10) is 1 / 20 to 1 / 10.

9. A biological fermentation culture device according to claim 8, characterized in that: The rotating shaft and the bearing are fixed by interference fit or key connection.

10. A biological fermentation culture device according to claim 9, characterized in that: The guide groove (31) is made of stainless steel and has a thickness of 1 to 3 mm.

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