Stirring device for biological fermentation tank

Abstract

The utility model discloses a stirring device for a biological fermentation tank, which comprises a main body piece, a first stirring piece, a second stirring piece and a third stirring piece, foam on the liquid level in the biological fermentation tank is broken through the first stirring piece, materials are stirred through the second stirring piece, and meanwhile, the materials are pushed to move downwards along the axial direction of the main body piece. The third stirring piece is arranged on the main body piece, so that the materials move towards the third stirring piece in the stirring process, then are stirred again through the third stirring piece, and meanwhile, the materials are pushed to move outwards in the radial direction of the main body piece, and the materials are pushed to move upwards after flowing to the inner wall of the biological fermentation tank and then circulate to the first stirring piece and the second stirring piece; meanwhile, the stirring device also has turbulent flow diffusion capability, so that materials in the biological fermentation tank can be fully stirred and uniformly mixed, uniform gas distribution is kept, the fermentation effect and the gas utilization rate are improved, the operation stability and efficiency are kept, and the operation cost is further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of biological fermenters, and particularly relates to a stirring device for a biological fermenter. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present disclosure. To the extent described in this section, the work of the currently named inventors and aspects that may not constitute prior art descriptions at the time of filing are neither expressly nor impliedly considered prior art to the present disclosure.

[0003] Currently, in the stirring devices of fermenters commonly used in biological fermentation, the form of the stirring blades is single. During the actual stirring process, the turbulent effect of the liquid in the tank is not good, and the gas distribution is also uneven, which affects the fermentation effect and gas utilization rate. When the state of the strains in the sealed tank is not good, it is easy to cause the problem of foaming. The foaming phenomenon is difficult to handle, the operation stability is poor, the efficiency is poor, and the energy consumption is high. Summary of the Utility Model

[0004] In view of the defects existing in the prior art, the present application provides a stirring device for a biological fermenter to solve the problems of poor stirring effect and poor reliability of the stirring device in the prior art.

[0005] The above object of the present application is mainly achieved by the following technical solutions:

[0006] A stirring device for a biological fermenter, the stirring device comprising:

[0007] A main body member, one end of the main body member is used for fixedly connecting a power member and rotates under the drive of the power member;

[0008] A first stirring member, the first stirring member is fixedly arranged on the main body member, and the height of the first stirring member is not lower than the liquid level height in the biological fermenter, so that the first stirring member rotates synchronously with the main body member and breaks the foam on the liquid surface in the biological fermenter;

[0009] A second stirring member, the second stirring member is fixedly arranged on the main body member and rotates synchronously with the main body member. The second stirring member is arranged at intervals on the lower side of the first stirring member, and the second stirring member is used for stirring and pushing the materials in the biological fermenter to move downward along the axial direction of the main body member;

[0010] A third stirring member, the third stirring member is fixedly arranged on the main body member and rotates synchronously with the main body member. The third stirring member is arranged at intervals on the lower side of the second stirring member, and the third stirring member is used for stirring and pushing the materials in the biological fermenter to move radially outward along the main body member.

[0011] In an alternative embodiment, one end of the main body member is located outside the bioreactor, the other end of the main body member passes through the bioreactor and extends into the bioreactor, a sealing member is provided on the main body member, and the sealing member is clamped between the main body member and the bioreactor.

[0012] In an alternative embodiment, a positioning member that can be fixed inside the bioreactor is provided at the end of the main body member extending into the bioreactor, the main body member can rotate relative to the positioning member, and the positioning member is used to limit the radial swing of the main body member.

[0013] In an alternative embodiment, the sealing member is a rubber sleeve, and the sealing member has a stepped surface for abutting against the bioreactor.

[0014] In an alternative embodiment, the first stirring member includes a plurality of first stirring portions, and the plurality of first stirring portions are circumferentially arranged on the main body member at intervals.

[0015] In an alternative embodiment, each of the first stirring portions is provided with convex teeth for breaking up a plurality of foams.

[0016] In an alternative embodiment, the second stirring member includes a plurality of second stirring portions, and the plurality of second stirring portions are circumferentially arranged on the main body member at intervals.

[0017] In an alternative embodiment, the second stirring portion adopts an axial-flow flat blade.

[0018] In an alternative embodiment, the third stirring member includes a plurality of third stirring portions, and the plurality of third stirring portions are circumferentially arranged on the main body member at intervals.

[0019] In an alternative embodiment, the third stirring portion adopts a radial-flow parabolic blade.

[0020] Compared with the prior art, the advantages of the present application are as follows:

[0021] The stirring device of the present application includes a main body part, a first stirring part, a second stirring part, and a third stirring part. One end of the main body part is used for fixedly connecting a power part and rotates under the drive of the power part. The first stirring part is fixedly arranged on the main body part, and the height of the first stirring part is not lower than the liquid level height in the biological fermentation tank, so that the first stirring part rotates synchronously with the main body part and breaks the foam on the liquid surface in the biological fermentation tank. The second stirring part is fixedly arranged on the main body part and rotates synchronously with the main body part. The second stirring part is arranged at intervals on the lower side of the first stirring part, and the second stirring part is used for stirring and pushing the materials in the biological fermentation tank to move downward along the axial direction of the main body part. The third stirring part is fixedly arranged on the main body part and rotates synchronously with the main body part. The third stirring part is arranged at intervals on the lower side of the second stirring part, and the third stirring part is used for stirring and pushing the materials in the biological fermentation tank to move radially outward along the main body part. During the actual operation process, the main body part is driven by an external power input to rotate in the biological fermentation tank. The first stirring part, the second stirring part, and the third stirring part rotate synchronously. The first stirring part breaks the foam on the liquid surface in the biological fermentation tank. While the second stirring part stirs the materials, it also pushes the materials to move downward along the axial direction of the main body part, so that the materials move towards the third stirring part during the stirring process, and then are stirred again by the third stirring part. At the same time, the third stirring part pushes the materials to move radially outward along the main body part. After the materials flow to the inner wall of the biological fermentation tank, they are pushed upward, and then circulate to the first stirring part and the second stirring part, and continuously defoam and stir, improving the convection circulation ability. At the same time, it also has the ability of turbulent diffusion, which can fully stir and mix the materials in the biological fermentation tank, keep the gas distribution uniform, improve the fermentation effect and gas utilization rate, maintain the operation stability and efficiency, and further reduce the operation cost. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0023] Figure 1 It is a schematic structural diagram of the stirring device provided by the embodiment of the present application;

[0024] In the figure: 100, main body part; 101, connecting part; 200, first stirring part; 201, first stirring portion; 202, convex teeth; 300, second stirring part; 301, second stirring portion; 400, third stirring part; 401, third stirring portion; 500, sealing part; 501, stepped surface. Detailed Embodiments

[0025] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted here that the description of these embodiments is used to help understand the present utility model, but does not constitute a limitation to the present utility model. The specific structural and functional details disclosed herein are only used to describe the exemplary embodiments of the present utility model. However, the present utility model can be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0026] As Figure 1 shown, Figure 1 FIG. is a schematic structural diagram of a stirring device provided by an embodiment of the present application. A stirring device for a bioreactor, the stirring device includes a main body member 100, a first stirring member 200, a second stirring member 300, and a third stirring member 400, wherein:

[0027] As Figure 1 shown, one end of the main body member 100 is used for fixedly connecting a power member and rotates under the drive of the power member. In actual configuration, a detachable connecting member 101 can be provided at the output end of the power member to be detachably connected to the main body member 100. The connecting member 101 can adopt a coupling or a connecting flange.

[0028] As Figure 1 shown, the first stirring member 200 is fixedly arranged on the main body member 100. The height of the first stirring member 200 is not lower than the liquid level height in the bioreactor, so that the first stirring member 200 rotates synchronously with the main body member 100 and breaks the foam on the liquid surface in the bioreactor. The main body member 100 transmits the output power of the power member and drives the first stirring member 200 to rotate. By maintaining the installation position of the first stirring member 200, the foam generated on the liquid surface is eliminated during the rotation of the first stirring member 200. The height of the first stirring member 200 can be flush with the liquid level in the bioreactor or can be a certain distance higher than the liquid level in the bioreactor, so as to avoid stirring the lower part of the liquid surface in the bioreactor and maintain a reliable defoaming effect. During actual operation, an antifoaming agent can also be used in cooperation to improve the foam elimination efficiency.

[0029] As Figure 1As shown, the second stirring member 300 is fixedly arranged on the main body member 100 and rotates synchronously with the main body member 100. The second stirring member 300 is arranged at intervals on the lower side of the first stirring member 200. The second stirring member 300 is used for stirring and pushing the materials in the biological fermentation tank to move downward along the axial direction of the main body member 100. The second stirring member 300 stirs the materials at this place and at the same time pushes the materials to move along the axial direction of the main body member 100 towards the third stirring member 400. While improving the circulation ability, it also has the ability of turbulent diffusion. During actual operation, it can be used in cooperation with the baffle of the fermentation tank to improve the stirring effect.

[0030] As Figure 1 As shown, the third stirring member 400 is fixedly arranged on the main body member 100 and rotates synchronously with the main body member 100. The third stirring member 400 is arranged at intervals on the lower side of the second stirring member 300. The third stirring member 400 is used for stirring and pushing the materials in the biological fermentation tank to move radially outward along the main body member 100. The materials stirred by the second stirring member 300 move to the third stirring member 400 and are synchronously stirred by the third stirring member 400. The third stirring member 400 also pushes the materials to move radially outward along the main body member 100 at the same time, so that the materials circulate upward along the guiding line on the inner wall of the biological fermentation tank to the first stirring member 200 and the second stirring member 300, and the circulation ability is improved through cyclic stirring.

[0031] In an alternative embodiment, the working principle of the stirring device of the present application is as follows: The stirring device includes a main body member 100, a first stirring member 200, a second stirring member 300, and a third stirring member 400. One end of the main body member 100 is used for fixedly connecting a power member and rotates under the drive of the power member. The first stirring member 200 is fixedly arranged on the main body member 100, and the height of the first stirring member 200 is not lower than the liquid level height in the bioreactor, so that the first stirring member 200 rotates synchronously with the main body member 100 and breaks the foam on the liquid surface in the bioreactor. The second stirring member 300 is fixedly arranged on the main body member 100 and rotates synchronously with the main body member 100. The second stirring member 300 is arranged at intervals on the lower side of the first stirring member 200. The second stirring member 300 is used for stirring and pushing the material in the bioreactor to move downward along the axial direction of the main body member 100. The third stirring member 400 is fixedly arranged on the main body member 100 and rotates synchronously with the main body member 100. The third stirring member 400 is arranged at intervals on the lower side of the second stirring member 300. The third stirring member 400 is used for stirring and pushing the material in the bioreactor to move radially outward along the main body member 100. During the actual operation process, the main body member 100 is driven by an external power input to rotate in the bioreactor. The first stirring member 200, the second stirring member 300, and the third stirring member 400 rotate synchronously. The first stirring member 200 breaks the foam on the liquid surface in the bioreactor. While the second stirring member 300 stirs the material, it also pushes the material to move downward along the axial direction of the main body member 100, so that the material moves towards the third stirring member 400 during the stirring process. Then, the material is stirred again by the third stirring member 400, and at the same time, the material is pushed to move radially outward along the main body member 100. After the material flows to the inner wall of the bioreactor, it is pushed upward and then circulated to the first stirring member 200 and the second stirring member 300, and continuous defoaming and stirring are carried out, improving the convective circulation ability. At the same time, it also has the ability of turbulent diffusion, which can fully stir and mix the material in the bioreactor, keep the gas distribution uniform, improve the fermentation effect and gas utilization rate, maintain the operation stability and efficiency, and further reduce the operation cost.

[0032] As Figure 1 shown, in an alternative embodiment, one end of the main body member 100 is located outside the bioreactor, the other end of the main body member 100 passes through the bioreactor and extends into the bioreactor. A seal member 500 is provided on the main body member 100, and the seal member 500 is clamped between the main body member 100 and the bioreactor.

[0033] The seal member 500 maintains the airtightness in the bioreactor and effectively ensures the anaerobic environment in the fermenter, improving the operation reliability.

[0034] AsFigure 1 As shown, in an alternative embodiment, the main body member 100 extends to one end of the bioreactor and is provided with a positioning member that can be fixed inside the bioreactor. The main body member 100 can rotate relative to the positioning member, and the positioning member is used to limit the radial swing of the main body member 100.

[0035] After the positioning member is fixed inside the bioreactor, through the mutual restraint between the positioning member and the main body member 100, the stability of the main body member 100 during rotation is improved, preventing the main body member 100 from swinging due to the interaction between the main body member 100 and the material inside the bioreactor, and enhancing the stability.

[0036] As Figure 1 shown, in an alternative embodiment, the sealing member 500 is a rubber sleeve, and the sealing member 500 has a stepped surface 501 for abutting against the bioreactor. The rubber sleeve has a certain deformation ability, absorbs a certain degree of vibration, and increases the stability and sealing effect through the stepped surface 501.

[0037] As Figure 1 shown, in an alternative embodiment, the first stirring member 200 includes a plurality of first stirring portions 201, and the plurality of first stirring portions 201 are circumferentially arranged on the main body member 100 at intervals.

[0038] As Figure 1 shown, in an alternative embodiment, each of the first stirring portions 201 is provided with a plurality of convex teeth 202 for breaking foam. The convex teeth 202 pierce the bubbles formed on the liquid surface, and the plurality of first stirring portions 201 effectively inhibit the bubbles.

[0039] As Figure 1 shown, in an alternative embodiment, the second stirring member 300 includes a plurality of second stirring portions 301, and the plurality of second stirring portions 301 are circumferentially arranged on the main body member 100 at intervals.

[0040] As Figure 1 shown, in an alternative embodiment, the second stirring portion 301 adopts an axial-flow flat blade to maintain reliable stirring and pushing efficiency.

[0041] As Figure 1 shown, in an alternative embodiment, the third stirring member 400 includes a plurality of third stirring portions 401, and the plurality of third stirring portions 401 are circumferentially arranged on the main body member 100 at intervals.

[0042] As Figure 1As shown, in an alternative embodiment, the third stirring part 401 adopts a radial-flow type parabolic blade. By setting the radial-flow type parabolic blade, the radial displacement and dispersion ability are maintained. Under the same output power of the power, the mass transfer coefficient of the radial-flow type parabolic blade is higher, and the gas holding capacity is also higher. Correspondingly, the power consumption is greatly reduced.

[0043] Correspondingly, in order to enable the third stirring member 400 to stir the material while also pushing the material to move radially along the main body member 100, each third stirring part 401 can also adopt an axial-flow blade group arranged radially along the main body member 100. Then, through the radial arrangement of the axial-flow blade group, correspondingly, the multiple third stirring parts 401 can respectively push the material to move radially along the main body member 100 to maintain the reliability of cyclic stirring.

[0044] It should be understood that the terms first, second, etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance. Although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, the first unit may be referred to as the second unit, and similarly, the second unit may be referred to as the first unit, without departing from the scope of the exemplary embodiments of the present invention.

[0045] It should be understood that the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, B exists alone, and both A and B exist simultaneously. The term " / and" herein describes another association object relationship, indicating that two relationships may exist. For example, A / and B may represent: A exists alone, and both A and B exist alone. Additionally, the character " / " herein generally represents that the front and rear associated objects are in an "or" relationship.

[0046] It should be understood that in the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "vertical", "inner", "outer", etc. is the orientation or positional relationship in which the disclosed product is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0047] In the description of the present utility model, it should also be noted that, unless otherwise clearly defined and limited, the terms "arranged", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0048] The terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present utility model. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the terms "comprises", "comprising", "includes", and / or "including" when used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not preclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0049] Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, those of ordinary skill in the art should understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and technologies may not be shown in unnecessary detail to avoid obscuring the exemplary embodiments.

[0050] The above are only specific implementation manners of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

[0051] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art.

Claims

1. A stirring device for a bioreactor, characterized in that, The stirring device includes: A main body member, one end of which is used for fixedly connecting a power member and rotates under the drive of the power member; A first stirring member fixedly arranged on the main body member, the height of the first stirring member being not lower than the liquid level height in the biological fermentation tank, so that the first stirring member rotates synchronously with the main body member and breaks the foam on the liquid surface in the biological fermentation tank; A second stirring member fixedly arranged on the main body member and rotating synchronously with the main body member, the second stirring member being arranged at intervals on the lower side of the first stirring member, and the second stirring member being used for stirring and pushing the materials in the biological fermentation tank to move downward along the axial direction of the main body member; A third stirring member fixedly arranged on the main body member and rotating synchronously with the main body member, the third stirring member being arranged at intervals on the lower side of the second stirring member, and the third stirring member being used for stirring and pushing the materials in the biological fermentation tank to move radially outward along the main body member.

2. The stirring device for a bioreactor according to claim 1, wherein: One end of the main body member is located outside the biological fermentation tank, the other end of the main body member passes through the biological fermentation tank and extends into the biological fermentation tank, and a sealing member is arranged on the main body member, and the sealing member is clamped between the main body member and the biological fermentation tank.

3. The stirring device for a bioreactor according to claim 2, characterized in that: A positioning member that can be fixed in the biological fermentation tank is arranged at one end of the main body member extending into the biological fermentation tank, the main body member can rotate relative to the positioning member, and the positioning member is used for restricting the radial swing of the main body member.

4. The stirring device for a bioreactor according to claim 2, characterized in that: The sealing member is a rubber sleeve, and the sealing member has a stepped surface for abutting against the biological fermentation tank.

5. The stirring device for a bioreactor according to claim 1, characterized in that: The first stirring member includes a plurality of first stirring parts, and the plurality of first stirring parts are circumferentially arranged on the main body member at intervals.

6. The stirring device for a bioreactor according to claim 5, characterized in that: Each of the first stirring parts is provided with convex teeth for breaking a plurality of foams.

7. The stirring device for a bioreactor according to claim 1, wherein: The second stirring member includes a plurality of second stirring parts, and the plurality of second stirring parts are circumferentially arranged on the main body member at intervals.

8. The stirring device for a bioreactor according to claim 7, characterized in that: The second stirring part adopts an axial-flow straight blade.

9. The stirring device for a bioreactor according to claim 1, characterized in that: The third stirring member includes a plurality of third stirring parts, and the plurality of third stirring parts are circumferentially arranged on the main body member at intervals.

10. The stirring device for a bioreactor according to claim 9, characterized in that: The third stirring part adopts a radial-flow parabolic blade.

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