A double-shaft stirring fermenter suitable for high viscosity fermentation broth

Abstract

The utility model discloses a double -shaft stirring fermentation tank suitable for high viscosity fermentation liquor, including jar body, the top of jar body is equipped with the jar cover through the bolt fixed mounting, and the jar body and the jar cover are rotatably connected with main shaft mechanism through bearing between, the main shaft mechanism includes inner shaft, and the outside of inner shaft is rotatably connected with the outer shaft through bearing, the outside key connection of inner shaft has sun gear, and the inside key connection of outer shaft has ring gear, the inner shaft and the outer shaft of main shaft mechanism will reverse rotation, and the spiral stirring paddle fixed in the outside of inner shaft will send the fermentation liquor of outside and bottom upwards, and the paddle fixed on the outer shaft will drive the rotation mixing of fermentation liquor, and further make the mechanism can mix the fermentation liquor fully under the condition of lower speed, can reduce the possibility of filamentous fungi mycelium fracture, under the condition of keeping the inherent fermentation rate of fermentation liquor, mixes the fermentation liquor fully, to further improve the efficiency of fermentation.

Description

Technical Field

[0001] This utility model belongs to the field of fermentation tank technology, specifically relating to a twin-shaft stirred fermentation tank suitable for high-viscosity fermentation broth. Background Technology

[0002] Fermenters are the core equipment for industrial microbial fermentation, and their mixing efficiency and temperature control performance directly affect the fermentation rate and product quality.

[0003] For fermentation broths with high viscosity and non-Newtonian fluid properties (such as filamentous fungal fermentation systems), the following significant drawbacks still exist, limiting fermentation efficiency:

[0004] Firstly, in order to increase the mixing degree of the fermentation liquid in the fermenter, a high-speed agitator is used to stir it. However, this will slow down the inherent fermentation rate of the high-viscosity, poor-flowability, and pressure and shear-sensitive fermentation liquid, and the overall fermentation rate will increase slowly.

[0005] Secondly, simply heating the fermentation liquid inside the tank with a water bath is not feasible. When the fermentation temperature is too high, it is difficult to cool it down quickly. This leads to the inhibition of microbial activity during the fermentation process, and even the proliferation of miscellaneous bacteria, which in turn causes the fermentation process to get out of control.

[0006] Therefore, we propose a twin-shaft stirred fermenter suitable for high-viscosity fermentation broths. Utility Model Content

[0007] The purpose of this invention is to provide a twin-shaft stirred fermenter suitable for high-viscosity fermentation broths, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a twin-shaft stirred fermenter suitable for high-viscosity fermentation liquid, comprising a tank body, wherein a tank cover is fixedly installed at the top of the tank body by bolts, and a main shaft mechanism is rotatably connected between the tank body and the tank cover by bearings;

[0009] The main shaft mechanism includes an inner shaft, and an outer shaft is rotatably connected to the outside of the inner shaft via bearings. A sun gear is keyed to the outside of the inner shaft, and a gear ring is keyed to the inside of the outer shaft. The sun gear and gear ring are provided with a cage, and positioning rods distributed at equal intervals are fixedly installed on the top outer wall of the cage by bolts. Planetary gears distributed at equal intervals are rotatably connected to the inside of the cage via bearings, and the planetary gears mesh with the sun gear and gear ring respectively. Positioning holes distributed at equal intervals are opened on the bottom outer wall of the can lid, and positioning rods are inserted into the positioning holes.

[0010] A spiral stirring paddle is fixedly installed on the outside of the inner shaft by bolts, and a stirring rod is fixedly installed on the outside of the outer shaft by bolts. The stirring rod and the outer shaft teeth are fixedly installed with blades that are evenly distributed between them by bolts.

[0011] A reducer is fixedly installed on the top outer wall of the can lid by bolts, and the output end of the reducer is fixedly connected to the inner shaft by a coupling. A motor is fixedly installed on the top outer wall of the reducer by bolts, and the output end of the motor is keyed to the input end of the reducer.

[0012] Furthermore, the tank body includes an outer tank wall and an inner tank wall, and a heat exchange cavity is formed between the outer tank wall and the inner tank wall. A heat insulation layer is sintered on the side of the outer tank wall near the heat exchange cavity. Two explosion-proof heaters are fixedly installed on the outer side wall of the outer tank wall by bolts, and the output end of the explosion-proof heaters extends into the interior of the heat exchange cavity.

[0013] Furthermore, a drain pipe and a water inlet pipe are threadedly connected to the outer side wall of the outer tank, and both the drain pipe and the water inlet pipe extend into the interior of the heat exchange chamber. One end of each drain pipe and the water inlet pipe is threadedly connected to a solenoid valve.

[0014] Furthermore, a manhole is provided on one side of the top outer wall of the can lid, and an observation window is provided on the other side of the top outer wall of the can lid.

[0015] Furthermore, a temperature and humidity sensor and a pH sensor are threadedly connected to the top outer wall of the can lid, and the receiving ends of the temperature and humidity sensor and the pH sensor both extend into the interior of the can body.

[0016] Furthermore, a screw conveyor is fixedly installed on the bottom outer wall of the tank by bolts, and the screw conveyor is interconnected with the interior of the inner tank wall. A base is fixedly installed on the bottom outer wall of the tank by bolts.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. Through the main shaft mechanism, during the fermentation process, the inner and outer shafts of the main shaft mechanism will rotate in opposite directions. The spiral stirring paddle fixed outside the inner shaft will transport the fermentation liquid from the outside and bottom upwards, while the paddle fixed on the outer shaft will drive the fermentation liquid to rotate and mix. This allows the mechanism to fully mix the fermentation liquid at a lower speed, reducing the possibility of mycelial breakage of filamentous fungi. While maintaining the inherent fermentation rate of the fermentation liquid, it can fully mix the fermentation liquid to further improve the fermentation efficiency.

[0019] 2. Through the heat exchange chamber, two explosion-proof heaters are installed on the outside of the tank to heat the solution inside the heat exchange chamber, thereby heating the fermentation liquid inside the tank and keeping it within a suitable temperature range. When the fermentation liquid is overheated, the solution inside the heat exchange chamber can be drained through the drain pipe and a cooler solution can be injected through the water inlet pipe, so that the fermentation liquid can be cooled down quickly to prevent high temperature from affecting the fermentation process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the tank structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the main shaft mechanism of this utility model;

[0023] Figure 4 This is a partial sectional view of the main shaft mechanism structure of this utility model;

[0024] Figure 5 This is a cross-sectional view of the main shaft mechanism structure of this utility model.

[0025] In the diagram: 1. Tank body; 2. Tank lid; 3. Reducer; 4. Motor; 5. Manhole; 6. Observation window; 7. Temperature and humidity sensor; 8. pH sensor; 9. Base; 11. Screw conveyor; 12. Drain pipe; 13. Water inlet pipe; 14. Solenoid valve; 15. Outer tank wall; 16. Insulation layer; 17. Inner tank wall; 18. Heat exchange chamber; 19. Positioning hole; 20. Main shaft mechanism; 21. Inner shaft; 22. Spiral agitator; 23. Outer shaft; 24. Agitator rod; 25. Blade; 26. Positioning rod; 27. Sun gear; 28. Gear ring; 29. ​​Planetary gear; 30. Cage; 31. Explosion-proof heater. Detailed Implementation

[0026] 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.

[0027] Example 1: Please refer to Figures 1 to 5 This utility model provides a technical solution: a twin-shaft stirred fermenter suitable for high viscosity fermentation liquid, including a tank body 1, a tank cover 2 fixedly installed on the top of the tank body 1 by bolts, and a main shaft mechanism 20 rotatably connected between the tank body 1 and the tank cover 2 by bearings;

[0028] The main shaft mechanism 20 includes an inner shaft 21, and an outer shaft 23 is rotatably connected to the outside of the inner shaft 21 via bearings. A sun gear 27 is keyed to the outside of the inner shaft 21, and a gear ring 28 is keyed to the inside of the outer shaft 23. A retainer 30 is provided for the sun gear 27 and the gear ring 28. The retainer 30 is used to maintain the shape of the planetary gear 29. Positioning rods 26 distributed at equal intervals are fixedly installed on the top outer wall of the retainer 30 by bolts. Planetary gears 29 distributed at equal intervals are rotatably connected to the inside of the retainer 30 via bearings. The planetary gears 29 mesh with the sun gear 27 and the gear ring 28 respectively. Positioning holes 19 distributed at equal intervals are opened on the bottom outer wall of the can cover 2, and the positioning rods 26 are inserted into the inside of the positioning holes 19 to fix the position of the retainer 30 and the planetary gears 29 to prevent them from rotating around the sun gear 27.

[0029] A spiral stirring paddle 22 is bolted to the outside of the inner shaft 21 to drive the fermentation liquid to churn. A stirring rod 24 is bolted to the outside of the outer shaft 23, and blades 25 distributed at equal intervals are bolted between the stirring rod 24 and the teeth of the outer shaft 23 to agitate the fermentation liquid.

[0030] A reducer 3 is bolted to the top outer wall of the can lid 2. The reducer 3 is used to reduce the rotation of the motor 4 and increase the torque. The output end of the reducer 3 is fixedly connected to the inner shaft 21 through a coupling. The motor 4 is bolted to the top outer wall of the reducer 3. The preferred model of the motor 4 is SIEMENS 1PH8034-2AA10-0AA0, which is used to provide power. The output end of the motor 4 is keyed to the input end of the reducer 3.

[0031] As can be seen from the above description, the present invention has the following beneficial effects: Through the main shaft mechanism 20, during the fermentation process, the inner shaft 21 and the outer shaft 23 of the main shaft mechanism 20 will rotate in opposite directions. The spiral stirring paddle 22 fixed outside the inner shaft 21 will transport the fermentation liquid from the outside and bottom upwards, while the paddle blade 25 fixed on the outer shaft 23 will drive the fermentation liquid to rotate and mix. This allows the mechanism to fully mix the fermentation liquid at a lower speed, which can reduce the possibility of mycelial breakage of filamentous fungi. While maintaining the inherent fermentation rate of the fermentation liquid, the fermentation liquid is fully mixed to further improve the fermentation efficiency.

[0032] Further reading is available. Figure 1A screw conveyor 11 is fixedly installed on the bottom outer wall of the tank 1 by bolts. The preferred model of the screw conveyor 11 is LS315. The screw conveyor 11 is used to output the fermentation liquid after fermentation is completed. The screw conveyor 11 is connected to the interior of the inner tank wall 17. A base 9 is fixedly installed on the bottom outer wall of the tank 1 by bolts for fixing the device.

[0033] Example 2: Please refer to Figures 1 to 5 As shown, based on Embodiment 1, this utility model provides a technical solution: the tank 1 includes an outer tank wall 15 and an inner tank wall 17, with a heat exchange cavity 18 formed between the outer tank wall 15 and the inner tank wall 17. A heat insulation layer 16 is sintered on the side of the outer tank wall 15 near the heat exchange cavity 18, preventing heat from escaping to the external environment. Two explosion-proof heaters 31 are bolted to the outer side wall of the outer tank wall 15 for heating the solution inside the heat exchange cavity 18. The heating element is installed in the heat exchange chamber 18. The output end of the explosion-proof heater 31 extends into the interior of the heat exchange chamber 18. A drain pipe 12 and a water inlet pipe 13 are threadedly connected to the outer side wall of the outer tank 15. The drain pipe 12 and the water inlet pipe 13 are used to replace the solution inside the heat exchange chamber 18. Both the drain pipe 12 and the water inlet pipe 13 extend into the interior of the heat exchange chamber 18. A solenoid valve 14 is threadedly connected to one end of the drain pipe 12 and the water inlet pipe 13. The solenoid valve 14 is used to control the opening and closing of the drain pipe 12 and the water inlet pipe 13.

[0034] Using the above technical solution, two explosion-proof heaters 31 are installed on the outside of the tank 1, which can heat the solution inside the heat exchange chamber 18, thereby heating the fermentation liquid inside the tank 1 and keeping it within a suitable temperature range. When the fermentation liquid is overheated, the solution inside the heat exchange chamber 18 can be released through the drain pipe 12, and a lower temperature solution can be injected through the water inlet pipe 13, so that the fermentation liquid can be cooled down quickly and prevent high temperature from affecting the fermentation process.

[0035] Further reading is available. Figure 1 A manhole 5 is opened on one side of the top outer wall of the can lid 2, and an observation window 6 is opened on the other side of the top outer wall of the can lid 2. A temperature and humidity sensor 7 and a pH sensor 8 are threadedly connected to the top outer wall of the can lid 2. The temperature and humidity sensor 7 is preferably AMT-PH300, and the pH sensor 8 is preferably AMT-PH300. The temperature and humidity sensor 7 and the pH sensor 8 are respectively used to monitor the temperature, humidity and pH inside the can 1, and the receiving ends of the temperature and humidity sensor 7 and the pH sensor 8 are both connected to the inside of the can 1.

[0036] The working principle and usage process of this utility model are as follows: When in use, the operator adds the fermentation liquid and various medicines used in the fermentation process into the tank 1 through the manhole 5, and then turns on the motor 4. The motor 4 drives the inner shaft 21 to rotate through the reducer 3. The inner shaft 21 drives the fermentation liquid at the bottom and the outside to turn upward through the spiral stirring paddle 22.

[0037] Meanwhile, the sun gear 27 outside the inner shaft 21 will drive the planet gear 29 to rotate in the opposite direction to the sun gear 27. Since the retainer 30 outside the planet gear 29 is fixed to the bottom of the can lid 2 by the positioning rod 26 and the positioning hole 19, the planet gear 29 can only rotate around the fixed axis at its own center. The planet gear 29 drives the outer gear ring 28 to rotate in the same direction as the planet gear 29. The gear ring 28 drives the outer shaft 23 fixed to it to rotate. Since the inner shaft 21 and the sun gear 27 rotate in the same direction, the outer shaft 23 will rotate in the opposite direction to the inner shaft 21. During the rotation of the outer shaft 23, the stirring rod 24 will also drive the paddle 25 to rotate, stirring and mixing the fermentation liquid.

[0038] During fermentation, the explosion-proof heater 31 heats the solution inside the heat exchange chamber 18, and the solution then diffuses the heat into the fermentation liquid inside the tank 1, keeping the temperature of the fermentation liquid within a suitable range. If the temperature of the fermentation liquid becomes too high due to the fermentation process, the operator can open the solenoid valve 14, close the explosion-proof heater 31, and introduce a lower temperature solution into the heat exchange chamber 18 through the water inlet pipe 13, so that the heat of the fermentation liquid can diffuse into the lower temperature solution, thereby reducing the temperature and ensuring temperature stability.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A twin-shaft stirred fermenter suitable for high-viscosity fermentation broth, comprising a tank body (1), characterized in that: The top of the tank (1) is fixedly installed with a tank cover (2) by bolts, and the tank (1) and the tank cover (2) are rotatably connected by a main shaft mechanism (20) through a bearing. The main shaft mechanism (20) includes an inner shaft (21), and an outer shaft (23) is rotatably connected to the outside of the inner shaft (21) via bearings. A sun gear (27) is keyed to the outside of the inner shaft (21), and a gear ring (28) is keyed to the inside of the outer shaft (23). A retainer (30) is provided for the sun gear (27) and the gear ring (28), and a positioning rod (26) is fixedly installed on the top outer wall of the retainer (30) by bolts. Planetary gears (29) are rotatably connected to the inside of the retainer (30) via bearings, and the planetary gears (29) mesh with the sun gear (27) and the gear ring (28) respectively. A positioning hole (19) is opened on the bottom outer wall of the can cover (2) and is rotatably connected to the inside of the positioning hole (19). The positioning rod (26) is inserted into the inside of the positioning hole (19). The inner shaft (21) is fixedly mounted with a spiral stirring paddle (22) by bolts, and the outer shaft (23) is fixedly mounted with a stirring rod (24) by bolts. The stirring rod (24) and the outer shaft (23) are fixedly mounted with blades (25) that are evenly distributed between the teeth of the outer shaft (23) by bolts. A reducer (3) is fixedly installed on the top outer wall of the can lid (2) by bolts, and the output end of the reducer (3) is fixedly connected to the inner shaft (21) by a coupling. A motor (4) is fixedly installed on the top outer wall of the reducer (3) by bolts, and the output end of the motor (4) is keyed to the input end of the reducer (3).

2. The twin-shaft stirred fermenter suitable for high-viscosity fermentation broth according to claim 1, characterized in that: The tank (1) includes an outer tank wall (15) and an inner tank wall (17). A heat exchange cavity (18) is formed between the outer tank wall (15) and the inner tank wall (17). A heat insulation layer (16) is sintered on the side of the outer tank wall (15) near the heat exchange cavity (18). Two explosion-proof heaters (31) are fixedly installed on the outer side wall of the outer tank wall (15) by bolts. The output end of the explosion-proof heater (31) extends into the interior of the heat exchange cavity (18).

3. A twin-shaft stirred fermenter suitable for high-viscosity fermentation broth according to claim 2, characterized in that: The outer wall of the outer tank (15) is threaded with a drain pipe (12) and a water inlet pipe (13), and both the drain pipe (12) and the water inlet pipe (13) penetrate into the interior of the heat exchange chamber (18). One end of the drain pipe (12) and the water inlet pipe (13) is threaded with a solenoid valve (14).

4. A twin-shaft stirred fermenter suitable for high-viscosity fermentation broth according to claim 1, characterized in that: A manhole (5) is opened on one side of the top outer wall of the can lid (2), and an observation window (6) is opened on the other side of the top outer wall of the can lid (2).

5. A twin-shaft stirred fermenter suitable for high-viscosity fermentation broth according to claim 1, characterized in that: A temperature and humidity sensor (7) and a pH sensor (8) are threadedly connected to the top outer wall of the can lid (2), and the receiving ends of the temperature and humidity sensor (7) and the pH sensor (8) are both connected to the inside of the can body (1).

6. A twin-shaft stirred fermenter suitable for high-viscosity fermentation broth according to claim 1, characterized in that: A screw conveyor (11) is fixedly installed on the bottom outer wall of the tank (1) by bolts, and the screw conveyor (11) is connected to the interior of the inner tank wall (17). A base (9) is fixedly installed on the bottom outer wall of the tank (1) by bolts.

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