Hydrolysis tank based on hollow stirring shaft heat transfer

Abstract

The utility model relates to a kind of based on hollow stirring shaft heat's zymolysis tank, including the first tank body for carrying material liquid, second tank body is covered on the first tank body, it is characterized in that, tank body partition is equipped between the outside of first tank body and the inside of second tank body, liquid or gas that can be placed in tank body partition carries out heat exchange, the inside of first tank body is equipped with rotatable stirring main shaft, the top of first tank body is equipped with the driving assembly of driving stirring main shaft rotation, the side wall of stirring main shaft is equipped with several stirring assembly to material liquid is stirred, stirring main shaft is hollow design, one end of stirring main shaft is connected in tank body partition;The utility model transforms traditional solid stirring shaft into hollow runner structure, realizes the closed circulation system with tank body partition, while stirring paddle in physical stirring promotes material mixing, the rotation of stirring shaft and internal medium heat transfer form double action.

Description

Technical Field

[0001] This utility model relates to the field of fermentation tank technology, specifically to a fermentation tank based on heat transfer via a hollow stirring shaft. Background Technology

[0002] In the dairy industry, fermentation tanks are a key piece of equipment, primarily used for microbial cultivation and dairy product production during fermentation. By controlling parameters such as temperature, pH, and stirring speed, they provide a suitable growth environment for beneficial microorganisms like lactic acid bacteria, promoting the conversion of lactose in milk into lactic acid, thus forming fermented dairy products such as yogurt and cheese. Fermentation tanks are typically made of stainless steel, offering excellent sealing and corrosion resistance, ensuring sterility and hygiene during production. Furthermore, automated systems can monitor the fermentation status in real time, improving production efficiency and product consistency. In dairy processing, the use of fermentation tanks not only enhances the taste and nutritional value of products but also extends shelf life, making them an indispensable piece of equipment in the modern dairy industry.

[0003] Authorization announcement number CN214654984U discloses an automated intelligent biological fermentation cylindrical fermentation device. According to its instruction manual and drawings, the outer wall of the fermentation tank is provided with a heating groove, and the inside of the fermentation tank is provided with a thermometer. The output end of the first motor is provided with a rotating rod, the inner side of the rotating rod is provided with an electromagnet, the outer wall of the rotating rod is provided with a first magnetic block, the outer side of the first magnetic block is provided with a shrink sleeve, and the outer wall of the shrink sleeve is provided with a stirring rod.

[0004] However, the solution has certain limitations: 1. During the stirring process, the stirring rod is in direct contact with the liquid. Using only the heating tank to heat the inside of the fermentation tank will obviously result in poor stirring effect when the stirring rod is in contact with the liquid in the early stage because the temperature of the stirring rod has not risen. 2. How to make full use of the residual heat inside the heating tank to heat the liquid inside the fermentation tank is also a problem that needs to be considered. Summary of the Invention

[0005] This invention addresses the issue of temperature transfer efficiency in fermenters by proposing a fermentation tank based on heat transfer via a hollow stirring shaft. The traditional solid stirring shaft is transformed into a hollow flow channel structure, achieving a closed-loop circulation system separated from the tank body. This allows for the dynamic flow of steam or heat transfer oil within the stirring shaft. While the stirring blades physically stir and promote material mixing, the rotational motion of the stirring shaft and the internal medium heat transfer create a dual effect.

[0006] The objective of this invention is achieved through the following technical solution: a fermentation tank based on heat transfer via a hollow stirring shaft, comprising a first tank for carrying liquid material and a second tank covered by the first tank, characterized in that a tank partition is provided between the outer side of the first tank and the inner side of the second tank, the tank partition being capable of holding liquid or gas for heat exchange, a rotatable stirring shaft being provided inside the first tank, a drive assembly for driving the stirring shaft to rotate being provided at the top of the first tank, and a plurality of stirring assemblies for stirring the liquid material being provided on the side wall of the stirring shaft, the stirring shaft being a hollow design, and one end of the stirring shaft being connected to the tank partition.

[0007] Preferably, each of the stirring components includes a blade support sleeve and a stirring blade mounted on the side wall of the blade support sleeve, the interior of which is mounted on the stirring spindle.

[0008] Preferably, each of the stirring blades and blade support sleeves is hollow, and the connection between the blade support sleeve and the stirring blade or stirring main shaft is provided with a through hole.

[0009] Preferably, the top of the first tank is provided with a detachable tank cover, and each of the stirring blades is inclined relative to the surface of the tank cover after being installed on the side wall of the blade support sleeve.

[0010] Preferably, the second tank has a first pipe interface, a second pipe interface and a third pipe interface on its side wall. The bottom of the stirring shaft passes through the bottom of the first tank and the second tank to the outside. The third pipe interface is connected to the bottom opening of the stirring shaft through a pipe.

[0011] Preferably, the drive assembly includes a motor support, a drive motor, and a coupling. The motor support is disposed on the surface of the tank cover, and the drive motor is located on the top of the motor support. The middle part of the motor support is hollow. The shaft of the drive motor extends into the middle of the motor support and is connected to one end of the coupling. The stirring shaft is connected to the other end of the coupling.

[0012] Preferably, the surface of the tank cover is provided with a liquid inlet, and the bottom of the first tank and the second tank are provided with liquid outlets. The liquid inside the first tank enters through the liquid inlet and flows out through the liquid outlet. This design is to facilitate gravity feeding or pipeline transportation.

[0013] Preferably, the first and second tanks are made of stainless steel, which has a smooth surface, is easy to clean, and meets the specifications. The part of the first tank that comes into contact with the material is mirror-polished to reduce dead corner residue and prevent bacterial growth.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. When both the stirring shaft and the stirring blades are at the same temperature as the heat exchange medium inside the tank partition. This design transforms the traditional solid stirring shaft into a hollow flow channel structure, realizing a closed-loop circulation system with the tank partition. This allows for the dynamic flow of steam or heat transfer oil inside the stirring shaft. While the stirring blades physically stir and promote material mixing, the rotational motion of the stirring shaft and the internal medium heat transfer create a dual effect: the flow of the medium inside the stirring shaft and stirring blades achieves better temperature control.

[0016] 2. This design innovatively improves heat transfer efficiency. Due to the temperature difference between the stirring shaft and impeller and the tank body jacket in existing technologies, the stirring shaft and impeller transfer heat synchronously with the tank body jacket, solving the long-standing problem of heat transfer lag. This reduces energy consumption ratio, significantly improves thermal energy utilization, and produces unexpected technical effects. Furthermore, for high-viscosity materials or materials prone to scaling, the heated impeller can prevent local low-temperature solidification. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 For the present utility model in Figure 2 Enlarged view of region A in the image;

[0020] Figure 4 This is a cross-sectional view of the present invention.

[0021] The diagram shows the following markings: 1. First tank; 2. Second tank; 21. First pipeline interface; 22. Second pipeline interface; 23. Third pipeline interface; 3. Tank partition; 4. Stirring shaft; 5. Stirring assembly; 51. Blade support sleeve; 52. Stirring blade; 53. Through hole; 6. Drive assembly; 61. Motor support base; 62. Drive motor; 63. Coupling; 7. Tank top cover; 71. Liquid inlet; 72. Liquid outlet. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0023] like Figure 1 and Figure 4As shown, a fermentation tank based on heat transfer through a hollow stirring shaft includes a first tank body 1 for holding the liquid feed, and a detachable tank cover 7 on the top of the first tank body 1. The surface of the tank cover 7 is provided with a liquid inlet 71, and the bottom of the first tank body 1 and the second tank body 2 are provided with liquid outlet 72. The liquid feed inside the first tank body 1 enters through the liquid inlet 71 and flows out through the liquid outlet 72.

[0024] With this configuration, the inlet port 71 is used to inject raw materials (such as culture media, enzyme preparations, microbial strains, etc.) into the tank. Since the inlet port 71 is located on the surface of the tank cover 7, it facilitates gravity feeding or pipeline transport. During continuous fermentation, the inlet port 71 can also replenish consumable nutrients (such as carbon and nitrogen sources) or provide pH-adjusting acid / alkaline solutions to maintain the metabolic needs of the microorganisms. After fermentation in the first tank 1 is completed, the products (such as enzyme hydrolysate and metabolic products) are discharged using the outlet port 72. The outlet port 72 is located at the bottom of the first tank 1, and efficient drainage is achieved using gravity or pumping.

[0025] Please continue to refer to this. Figure 2 The side wall of the first tank 1 is also covered by a second tank 2. A tank partition 3 is provided between the outer side of the first tank 1 and the inner side of the second tank 2. The tank partition 3 can hold liquid or gas for heat exchange.

[0026] The first tank 1 and the second tank 2 are made of stainless steel. Stainless steel has a smooth surface, is easy to clean, and meets the specifications. The parts of the first tank 1 that come into contact with the material are mirror-polished to reduce dead corner residue and prevent bacterial growth.

[0027] The first tank 1 is the reaction chamber that directly contacts the material. A gap between the first tank 1 and the second tank 2 forms a tank partition 3. A circulating medium (such as steam, cooling water, or heat transfer oil) within the tank partition 3 regulates the temperature of the material inside the first tank 1, isolating it from external ambient temperature interference.

[0028] Please continue to refer to this. Figure 2 and Figure 4 The first tank body 1 has a rotatable stirring shaft 4 inside, and a drive assembly 6 for driving the stirring shaft 4 to rotate is provided on the top of the first tank body 1. The drive assembly 6 includes a motor support 61, a drive motor 62, and a coupling 63. The motor support 61 is disposed on the surface of the tank body cover 7, and the drive motor 62 is provided on the top of the motor support 61. The middle part of the motor support 61 is hollow. The rotating shaft of the drive motor 62 extends into the middle part of the motor support 61 and is connected to one end of the coupling 63. The stirring shaft 4 is connected to the other end of the coupling 63.

[0029] The drive assembly 6's rotating shaft can drive the stirring main shaft 4 to rotate via coupling 63 during rotation. Since the drive assembly 6 is exposed on the surface of the tank cover 7, it is more convenient for subsequent maintenance.

[0030] Please continue to refer to this. Figure 3 The side wall of the stirring shaft 4 is provided with a plurality of stirring components 5 for stirring the liquid. Each stirring component 5 includes a blade support sleeve 51 and a stirring blade 52 installed on the side wall of the blade support sleeve 51. The inside of the blade support sleeve 51 is installed on the stirring shaft 4. Each stirring blade 52 is inclined relative to the surface of the tank cover 7 after being installed on the side wall of the blade support sleeve 51.

[0031] During rotation, the stirring shaft 4 simultaneously drives the stirring blades 52 to rotate via the blade support sleeve 51. The shear force and fluid circulation generated by the rotation of the stirring blades 52 keep the microorganisms and culture medium solids in the first tank 1 in a suspended state, preventing sedimentation at the bottom of the tank and thus avoiding reaction interruption. It also promotes the uniform diffusion of nutrients (carbon source, nitrogen source, etc.) in the fermentation broth, ensuring that microorganisms can efficiently absorb nutrients throughout the fermentation broth and eliminating local concentration differences.

[0032] In this embodiment, the stirring spindle 4 is hollow, and one end of the stirring spindle 4 is connected to the tank body partition 3. Each stirring blade 52 and blade support sleeve 51 is also hollow, and a through hole 53 is provided at the connection between the blade support sleeve 51 and the stirring blade 52 or the stirring spindle 4.

[0033] The second tank 2 has a first pipe interface 21, a second pipe interface 22 and a third pipe interface 23 on its side wall. The bottom of the stirring shaft 4 passes through the bottom of the first tank 1 and the second tank 2 to the outside. The third pipe interface 23 is connected to the bottom opening of the stirring shaft 4 through a pipe.

[0034] The first pipe interface 21 and the second pipe interface 22 serve as the inlet and outlet, respectively. The inlet and outlet are connected to external heat exchange media, and these heat exchange media are kept in a flowing or static state according to production needs. The media located in the tank partition 3 can flow into the bottom of the stirring shaft 4 through the pipe and gradually fill the interior of the stirring shaft 4. The media inside the stirring shaft 4 also gradually fills the stirring blades 52 through the through hole 53.

[0035] When both the stirring shaft 4 and the stirring blades 52 are at the same temperature as the heat exchange medium inside the tank partition 3, this design transforms the traditional solid stirring shaft into a hollow flow channel structure, realizing a closed-loop circulation system with the tank partition 3. This allows for the dynamic flow of steam or heat transfer oil inside the stirring shaft 4. While the stirring blades 52 physically stir and promote material mixing, the rotational motion of the stirring shaft and the internal medium heat transfer create a dual effect: the flow of the medium inside the stirring shaft 4 and the stirring blades 52 achieves better temperature control.

[0036] Working principle and usage of this utility model:

[0037] The inlet port 71 is used to inject raw materials into the tank. During rotation, the drive assembly 6's rotating shaft drives the stirring shaft 4 via the coupling 63. The stirring shaft 4, during rotation, simultaneously drives the stirring blades 52 via the blade support sleeve 51. The shear force generated by the rotating stirring blades 52 and the fluid circulation keep the microorganisms and culture medium solids in the first tank 1 in a suspended state, preventing sedimentation at the bottom and thus avoiding reaction interruption. After fermentation in the first tank 1 is complete, the product is discharged through the outlet port 72, which is located at the bottom of the first tank 1, utilizing gravity or pumping force for efficient discharge.

[0038] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A hydrolysis tank based on hollow stirring shaft heat transfer, comprising a first tank body (1) for carrying material liquid, a second tank body (2) covered on the first tank body (1), characterized in that, A tank partition (3) is provided between the outer side of the first tank (1) and the inner side of the second tank (2). The tank partition (3) can hold liquid or gas for heat exchange. The first tank (1) is provided with a rotating stirring shaft (4). The top of the first tank (1) is provided with a driving assembly (6) for driving the stirring shaft (4) to rotate. The side wall of the stirring shaft (4) is provided with several stirring assemblies (5) for stirring the liquid. The stirring shaft (4) is hollow. One end of the stirring shaft (4) is connected to the tank partition (3).

2. The fermentation tank based on hollow stirring shaft heat transfer according to claim 1, characterized in that, Each of the stirring components (5) includes a blade support sleeve (51) and a stirring blade (52) mounted on the side wall of the blade support sleeve (51), the interior of which is mounted on the stirring spindle (4).

3. The fermentation tank based on hollow stirring shaft heat transfer according to claim 2, characterized in that, Each of the stirring blades (52) and blade support sleeves (51) is hollow, and the blade support sleeves (51) are provided with through holes (53) at the connection between the stirring blades (52) or the stirring main shaft (4).

4. The fermentation tank based on hollow stirring shaft heat transfer according to claim 3, characterized in that, The top of the first tank (1) is provided with a removable tank cover (7), and each of the stirring blades (52) is inclined relative to the surface of the tank cover (7) after being installed on the side wall of the blade support sleeve (51).

5. The fermentation tank based on hollow stirring shaft heat transfer according to claim 4, characterized in that, The second tank (2) has a first pipeline interface (21), a second pipeline interface (22) and a third pipeline interface (23) on its side wall. The bottom of the stirring shaft (4) passes through the bottom of the first tank (1) and the second tank (2) to the outside. The third pipeline interface (23) is connected to the bottom opening of the stirring shaft (4) through a pipeline.

6. The fermentation tank based on hollow stirring shaft heat transfer according to claim 5, characterized in that, The drive assembly (6) includes a motor support base (61), a drive motor (62), and a coupling (63). The motor support base (61) is located on the surface of the tank cover (7). The top of the motor support base (61) is equipped with the drive motor (62). The middle part of the motor support base (61) is hollow. The shaft of the drive motor (62) extends into the middle part of the motor support base (61) and is connected to one end of the coupling (63). The stirring shaft (4) is connected to the other end of the coupling (63).

7. The fermentation tank based on hollow stirring shaft heat transfer according to claim 4, characterized in that, The surface of the tank cover (7) is provided with a liquid inlet (71), and the bottom of the first tank (1) and the second tank (2) are provided with a liquid outlet (72). The liquid inside the first tank (1) enters from the liquid inlet (71) and then flows out from the liquid outlet (72).

8. The fermentation tank based on heat transfer via a hollow stirring shaft according to any one of claims 1 to 7, characterized in that, The first tank (1) and the second tank (2) are made of stainless steel.

Images