High-efficiency mixing and dispersing device for microbial fermentation

Abstract

The utility model discloses a high -efficient mixing dispersion equipment for microorganism fermentation, including the box, the top surface fixed mounting of box has the stirring motor, and the output of stirring motor extends the box through the coupling and is installed stirring paddle in, the inside vertical of box is provided with the stand, and the surface welding of stand has the stirring board, and the surface of stirring board is provided with the flow guide hole, the top of stand extends to the welding of the above of box has the lifting frame, and is provided with the spring between lifting frame and box. In the utility model, through the rotation of driving motor and take -up cam, the cam promotes the pulley and lifting frame to move up and down, and then drives the reciprocating motion of stand and stirring board along the vertical direction, and the rotation stirring of cooperation stirring paddle forms "rotary shearing + up and down turn over" three -dimensional mixing mode, and the mixing time is greatly shortened, and the present equipment is significantly better, especially suitable for high viscosity or the fermentation system of containing particle, can effectively prevent material agglomeration.

Description

Technical Field

[0001] This utility model relates to the field of microbial fermentation equipment technology, and in particular to a high-efficiency mixing and dispersing device for microbial fermentation. Background Technology

[0002] In the process of microbial fermentation, the mixing and dispersion effect directly determines the cell growth rate, product synthesis efficiency and fermentation stability. The core requirement is to achieve homogenization of nutrients, oxygen, temperature and pH in the fermentation system, while enhancing gas-liquid mass transfer efficiency and avoiding inhibition problems caused by the accumulation of local metabolites. At present, existing microbial fermentation mixing equipment is mainly divided into mechanical stirring type, airlift type and circulation type. Among them, mechanical stirring type has become the most widely used equipment type in industrial fermentation due to its controllable mixing intensity and wide applicability.

[0003] Existing equipment mostly uses fixed-speed stirring paddles for radial or axial stirring. The stirring trajectory is relatively fixed, which easily forms a "mixing dead zone" at the bottom of the fermenter, between the tank wall and the stirring shaft. For example, although multi-layer turbine paddles can cover a certain axial range, there is still material retention in the area between the blades. Especially for high-viscosity fermentation systems, such as filamentous fungal fermentation broth, the material is prone to agglomerate in the gaps between the blades, resulting in local nutrient concentration deviations exceeding 15% and large fluctuations in the cell growth rate.

[0004] To address these shortcomings, we propose a high-efficiency mixing and dispersing device for microbial fermentation. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency mixing and dispersing device for microbial fermentation, which addresses the shortcomings of existing technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency mixing and dispersing device for microbial fermentation, comprising a box body, a stirring motor fixedly installed on the top surface of the box body, and a stirring paddle installed in the box body via a coupling at the output end of the stirring motor, a vertical column arranged inside the box body, a stirring plate welded to the surface of the column, and a guide hole opened on the surface of the stirring plate, a lifting frame welded to the top of the column extending to the top of the box body, and a spring provided between the lifting frame and the box body, a pulley fixedly installed on the top surface of the lifting frame, a drive motor installed on the top surface of the box body via a support frame, and a cam installed on the output end of the drive motor, and the cam cooperates with the pulley.

[0007] A tubular distributor is fixedly installed on the inner bottom surface of the box, and the surface of the tubular distributor is provided with distribution holes.

[0008] A vent pipe is fixedly installed on the bottom surface of the box, and one end of the vent pipe passes through the bottom surface of the box and is connected to the tubular distributor.

[0009] The top and bottom surfaces of the box are respectively equipped with a feed inlet and a discharge pipe.

[0010] The column has multiple stirring plates, which are equidistantly distributed on its surface.

[0011] The flow guide holes are provided in multiple ways, and the multiple flow guide holes are evenly distributed on the surface of the stirring plate.

[0012] A control switch is fixedly installed on the outer wall of the box, and the control switch is electrically connected to the drive motor and the stirring motor through wires.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. In this utility model, a drive motor drives a cam to rotate, which in turn pushes a pulley and a lifting frame to move up and down. This, in turn, causes the column and the stirring plate to reciprocate in the vertical direction. On the one hand, the up-and-down movement of the stirring plate breaks the limitation of the traditional fixed stirring paddle's "planar stirring" and expands the stirring range from the horizontal to the vertical direction, so that materials at different heights in the box can be fully stirred, effectively eliminating the material concentration difference between the bottom and the top. On the other hand, the guide holes on the surface of the stirring plate can guide the material through the stirring plate, preventing the material from accumulating on the top of the stirring plate. At the same time, in conjunction with the rotation of the stirring paddle, a three-dimensional mixing mode of "rotational shearing + up-and-down tumbling" is formed, which greatly shortens the mixing time and is significantly better than existing equipment. It is especially suitable for fermentation systems with high viscosity or particles, and can effectively prevent material agglomeration. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a cross-sectional view of a high-efficiency mixing and dispersing device for microbial fermentation proposed in this utility model; Figure 2 This is a schematic diagram of the external structure of a high-efficiency mixing and dispersing device for microbial fermentation proposed in this utility model; Figure 3 for Figure 1 A schematic diagram of a partial structure; Figure 4 This is a schematic diagram showing the connection between the support frame, drive motor, and cam.

[0016] Legend: 1. Box body; 2. Feed inlet; 3. Stirring motor; 4. Stirring paddle; 5. Vent pipe; 6. Tubular distributor; 7. Distribution hole; 8. Discharge pipe; 9. Column; 10. Stirring plate; 11. Lifting frame; 12. Pulley; 13. Spring; 14. Support frame; 15. Drive motor; 16. Cam; 17. Control switch; 18. Guide hole. Detailed Implementation

[0017] 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.

[0018] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A high-efficiency mixing and dispersing device for microbial fermentation includes a box body 1, a stirring motor 3 is fixedly installed on the top surface of the box body 1, and the output end of the stirring motor 3 extends into the box body 1 and is equipped with a stirring paddle 4 through a coupling.

[0019] The core components and key connections of the equipment are clearly defined. It is pointed out that the equipment includes the basic load-bearing structure of the housing 1, and the stirring motor 3 is fixed on the top surface of the housing 1 as a power source. Its output end is connected to the housing 1 through a coupling to ensure stable power transmission. The motor extends into the housing 1 and is connected to the stirring paddle 4 to provide rotational power to the stirring paddle 4 to achieve material stirring.

[0020] The interior of the box 1 is vertically provided with a column 9, and a stirring plate 10 is welded to the surface of the column 9, and a guide hole 18 is opened on the surface of the stirring plate 10.

[0021] The auxiliary stirring structure inside the housing 1 is described. The column 9 is set in the vertical direction and is connected to the stirring plate 10 by welding. The guide holes 18 on the surface of the stirring plate 10 are used to guide the flow of materials during the stirring process and avoid material accumulation.

[0022] The top of the column 9 extends to the top of the box 1 and is welded with a lifting frame 11, and a spring 13 is provided between the lifting frame 11 and the box 1.

[0023] The extension structure and reset component of column 9 are described. The top of column 9 extends out of the housing 1 and is welded and fixed to the lifting frame 11. The spring 13 between the lifting frame 11 and the housing 1 can provide a reset force after the lifting frame 11 is moved under force, ensuring the realization of subsequent reciprocating motion.

[0024] The top surface of the lifting frame 11 is fixedly equipped with a pulley 12, and the top surface of the housing 1 is equipped with a drive motor 15 through a support frame 14. The output end of the drive motor 15 is equipped with a cam 16, and the cam 16 works in conjunction with the pulley 12.

[0025] The power transmission structure for driving the stirring plate 10 to move up and down is described. The pulley 12 on the top surface of the lifting frame 11 cooperates with the cam 16 at the output end of the drive motor 15. When the drive motor 15 runs, it drives the cam 16 to rotate. The cam 16 pushes the lifting frame 11 to move through contact with the pulley 12, thereby realizing the movement of the column 9 and the stirring plate 10.

[0026] Please refer to Figure 1 A tubular distributor 6 is fixedly installed on the inner bottom surface of the housing 1, and a distribution hole 7 is opened on the surface of the tubular distributor 6.

[0027] The gas-liquid mass transfer components are introduced. The tubular distributor 6 is fixed to the bottom of the box 1. The distribution holes 7 on its surface are used to evenly disperse the gas into the fermentation material and improve the gas-liquid contact efficiency.

[0028] Please refer to Figure 1 , Figure 2 A vent pipe 5 is fixedly installed on the bottom surface of the housing 1, and one end of the vent pipe 5 passes through the bottom surface of the housing 1 and is connected to the tubular distributor 6.

[0029] The gas delivery path is described as follows: the vent pipe 5 is fixed to the bottom surface of the box 1, and one end passes through the box 1 and connects to the tubular distributor 6. External gas can enter the tubular distributor 6 through the vent pipe 5 and then be dispersed through the distribution hole 7.

[0030] Please refer to Figure 1 , Figure 2 The top and bottom surfaces of the housing 1 are respectively equipped with a feed inlet 2 and a discharge pipe 8.

[0031] The material inlet and outlet channels are clearly defined. The inlet 2 is located on the top surface of the box 1 and is used to add the material to be fermented into the box 1. The outlet pipe 8 is located on the bottom surface of the box 1 and is used to discharge the material after fermentation is completed.

[0032] Please refer to Figure 1 , Figure 3Multiple stirring plates 10 are provided, and the multiple stirring plates 10 are equidistantly distributed on the surface of the column 9.

[0033] The setting parameters of the mixing plate 10 are further refined. Multiple equally spaced mixing plates 10 can cover more material in the tank 1, enhancing the uniformity of mixing and avoiding insufficient mixing in certain areas. This is in conjunction with the instructions attached. Figure 1 It can be seen that each stirring plate 10 is located between two adjacent stirring blades in the stirring paddle 4, and the lifting stroke of the stirring plate 10 is less than the distance between two adjacent stirring blades, so there will be no motion interference.

[0034] Please refer to Figure 1 , Figure 3 Multiple flow guide holes 18 are provided, and the multiple flow guide holes 18 are evenly distributed on the surface of the stirring plate 10.

[0035] The distribution characteristics of the supplementary guide holes 18 are such that multiple evenly distributed guide holes 18 can guide the material flow more evenly, reduce the retention of material on the surface of the mixing plate 10, and improve the mixing efficiency.

[0036] Please refer to Figure 2 A control switch 17 is fixedly installed on the outer wall of the housing 1, and the control switch 17 is electrically connected to the drive motor 15 and the stirring motor 3 through wires.

[0037] The control components and their connections are explained. The control switch 17 is fixed on the outer wall of the housing 1 and is connected to the drive motor 15 and the stirring motor 3 through wires. It can control the start and stop of the two motors and their operating status, thereby regulating the overall workflow of the equipment.

[0038] Working principle: In use, firstly, add the microbial material to be fermented into the box 1 through the feed inlet 2 on the top surface of the box 1. Then, operate the control switch 17 on the outer wall of the box 1 to start the stirring motor 3 and the drive motor 15. After the stirring motor 3 starts running, its output end drives the stirring paddle 4 inside the box to rotate through the coupling, performing horizontal rotational shearing and stirring of the material. At the same time, the drive motor 15 drives the cam 16 at the output end to rotate. During the rotation, the cam 16 contacts the pulley 12 on the top surface of the lifting frame 11 and pushes the pulley 12 to move, thereby driving the lifting frame 11 to move up and down. The movement of the lifting frame 11 is transmitted to the column 9 welded to it, causing the column 9 to move back and forth in the vertical direction. The multiple equidistant stirring plates 10 welded to the surface of the column 9 move up and down synchronously. The guide holes 18 evenly distributed on the surface of the stirring plates 10 The material is guided through the mixing plate 10 to avoid material accumulation, forming a three-dimensional mixing mode of "rotational shearing + up-and-down tumbling". During this process, external sterile gas enters through the vent pipe 5 on the bottom surface of the chamber 1 and is transported to the tubular distributor 6 fixed on the bottom surface of the chamber 1 through the vent pipe 5. Then, it is evenly dispersed into the fermentation material through the distribution holes 7 on the surface of the tubular distributor 6, making efficient contact with the fully stirred material to achieve gas-liquid mass transfer. After fermentation is completed, the stirring motor 3 and the drive motor 15 are turned off, and the fermented material is discharged through the discharge pipe 8 on the bottom surface of the chamber 1, completing the entire fermentation mixing and dispersion process.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency mixing and dispersing device for microbial fermentation, comprising a housing (1), characterized in that, A stirring motor (3) is fixedly installed on the top surface of the box (1), and the output end of the stirring motor (3) extends into the box (1) and is installed with a stirring paddle (4) via a coupling. A column (9) is vertically arranged inside the box (1), and a stirring plate (10) is welded to the surface of the column (9). A guide hole (18) is opened on the surface of the stirring plate (10). A lifting frame (11) is welded to the top of the column (9) and extends to the top of the box (1). A spring (13) is provided between the lifting frame (11) and the box (1). A pulley (12) is fixedly installed on the top surface of the lifting frame (11). A drive motor (15) is installed on the top surface of the box (1) via a support frame (14), and a cam (16) is installed at the output end of the drive motor (15). The cam (16) is used in conjunction with the pulley (12).

2. The high-efficiency mixing and dispersing equipment for microbial fermentation according to claim 1, characterized in that, A tubular distributor (6) is fixedly installed on the inner bottom surface of the box (1), and a distribution hole (7) is opened on the surface of the tubular distributor (6).

3. The high-efficiency mixing and dispersing equipment for microbial fermentation according to claim 1, characterized in that, A vent pipe (5) is fixedly installed on the bottom surface of the box (1), and one end of the vent pipe (5) penetrates the bottom surface of the box (1) and is connected to the tubular distributor (6).

4. The high-efficiency mixing and dispersing equipment for microbial fermentation according to claim 1, characterized in that, The top and bottom surfaces of the box (1) are respectively equipped with a feed inlet (2) and a discharge pipe (8).

5. The high-efficiency mixing and dispersing equipment for microbial fermentation according to claim 1, characterized in that, The stirring plate (10) is provided in multiple ways, and the multiple stirring plates (10) are equidistantly distributed on the surface of the column (9).

6. The high-efficiency mixing and dispersing equipment for microbial fermentation according to claim 1, characterized in that, The guide holes (18) are provided in multiple ways, and the multiple guide holes (18) are evenly distributed on the surface of the stirring plate (10).

7. The high-efficiency mixing and dispersing equipment for microbial fermentation according to claim 1, characterized in that, A control switch (17) is fixedly installed on the outer wall of the box (1), and the control switch (17) is electrically connected to the drive motor (15) and the stirring motor (3) through wires.

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