Yeast fermentation enzymolysis device and enzymolysis method thereof

Abstract

The invention discloses a yeast fermentation enzymolysis device and an enzymolysis method thereof, and relates to the technical field of yeast fermentation enzymolysis, the yeast fermentation enzymolysis device comprises a base, and further comprises a fermentation tank rotationally mounted at the top of the base; the stirring shaft is of a hollow structure and is rotationally mounted on the inner side of the fermentation tank, and a plurality of blades are mounted on the side surface of the stirring shaft; the shaft seal is mounted on the stirring shaft and is used for supporting the stirring shaft and sealing the joint of the fermentation tank and the stirring shaft; the driving unit I is arranged at the top of the fermentation tank and used for driving the stirring shaft to rotate; the second driving unit is arranged at the top of the base and used for driving the fermentation tank to rotate; the cleaning unit is arranged in the stirring shaft and can clean the joint of the stirring shaft and the blade and the inner side gap of the shaft seal; according to the invention, substrate residues left in a gap at the joint of the stirring shaft and the shaft seal and on the lower end face of the joint of the stirring shaft and the blades can be cleaned, and the situation that the next fermentation is affected by mildewing caused by substrate residues in the fermentation tank can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of yeast fermentation enzymolysis, and specifically relates to a yeast fermentation enzymolysis device and an enzymolysis method thereof. Background Art

[0002] During the yeast fermentation process, yeast will use the enzymes produced in its cells to decompose (enzymolyze) external nutrients; appropriate stirring during yeast fermentation is beneficial to fermentation; for medium and large fermentation tanks, due to factors such as insufficient torque transmission capacity, magnetic coupling drive cannot be used; in order to prevent the leakage of fermentation broth and the infection of miscellaneous bacteria, a shaft seal needs to be set at the position where the stirring shaft passes through the tank body; refer to the attached Figure 1 description. The existing shaft seal is assembled by multiple components. In order to facilitate the installation, the end cover and the stirring shaft are in clearance fit, which results in gaps at the connection between the stirring shaft and the shaft seal; when the stirring shaft is working, the substrates in the tank will splash everywhere, and it is difficult to clean the substrate residues remaining in the gaps at the connection between the stirring shaft and the shaft seal and the lower end surface at the connection between the blade and the stirring shaft after fermentation, and mildew is likely to occur, affecting the next fermentation. Summary of the Invention

[0003] The purpose of the present invention is to provide a yeast fermentation enzymolysis device and an enzymolysis method thereof to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A yeast fermentation enzymolysis device includes a base, and further includes a fermentation tank rotatably installed on the top of the base; a stirring shaft, which is of a hollow structure and rotatably installed inside the fermentation tank, and a plurality of blades are installed on the side of the stirring shaft; a shaft seal installed on the stirring shaft for supporting the stirring shaft and sealing the connection between the fermentation tank and the stirring shaft; a driving unit one arranged on the top of the fermentation tank for driving the stirring shaft to rotate; a driving unit two arranged on the top of the base for driving the fermentation tank to rotate; a cleaning unit arranged inside the stirring shaft and capable of cleaning the connection between the stirring shaft and the blade and the inner gap of the shaft seal.

[0005] As a further solution of the present invention, the cleaning unit includes a cleaning block, a pipeline and a driving part; the cleaning block is elastically slidably connected to the stirring shaft along the radial direction of the stirring shaft and there are multiple; the multiple cleaning blocks are evenly distributed on the stirring shaft; two symmetrically arranged cleaning cavities are opened inside the cleaning block, and the cleaning cavities communicate with the inner cavity of the stirring shaft; the pipeline is fixedly connected to the fermentation tank and one end can be docked with the bottom end of the stirring shaft; the driving part can drive the cleaning block to slide outward along the stirring shaft when the pipeline is docked with the stirring shaft, so that the cleaning cavity is exposed.

[0006] As a further solution of the present invention, the driving part includes a sliding column; the sliding column is installed inside the stirring shaft and is elastically slidably connected to the stirring shaft in the vertical direction; several wedge-shaped pushing blocks are fixedly connected to the outer side wall of the sliding column, and the number of the wedge-shaped pushing blocks is equal to the number of the cleaning blocks and are respectively located on the sides of the cleaning blocks; the wedge-shaped pushing blocks can drive the cleaning blocks to slide outwards.

[0007] As a further solution of the present invention, a sealing ring is fixedly installed at the bottom end of the sliding column, and the sealing ring can cooperate with the sliding column to seal the opening at the bottom end of the stirring shaft.

[0008] As a further solution of the present invention, the cleaning cavity is arranged in the shape of a tapered nozzle with a wider inner end and a narrower outer end.

[0009] As a further solution of the present invention, a sealing block is arranged in the cleaning cavity, the sealing block can block the cleaning cavity, and the sealing block is slidably connected to the cleaning block in the vertical direction.

[0010] As a further solution of the present invention, the driving unit one includes a motor one, and the motor one is installed on the top of the fermentation tank and the output shaft is fixedly connected to the stirring shaft.

[0011] As a further solution of the present invention, the driving unit two includes a motor two, the motor two is installed on the top of the base and a sprocket one is fixedly connected to the output shaft, and the sprocket one is connected to a sprocket two through a chain drive; the sprocket two is fixedly installed on the rotating shaft of the fermentation tank.

[0012] A method for yeast fermentation and enzymatic hydrolysis, the method comprising the following steps: Step one: Add yeast and a substrate into the fermentation tank; Step two: The driving unit one drives the stirring shaft to rotate to stir the yeast and the substrate in the fermentation tank to promote fermentation; Step three: After fermentation is completed, take out the substrate from the fermentation tank; Step four: The cleaning unit inside the stirring shaft starts to work to clean the residue remaining in the gap at the connection between the stirring shaft and the shaft seal and the dead corner at the lower end face of the connection between the stirring shaft and the blade; Step five: Flush other non-dead corner areas of the inner wall of the fermentation tank by direct flushing with a water pipe; Step six: Perform a drying treatment on the fermentation tank and then seal and store it.

[0013] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, through the arrangement of the stirring shaft, driving unit one, and driving unit two, driving unit one drives the stirring shaft to rotate, and the stirring shaft drives the blades to rotate synchronously to stir the substrate; at the same time, driving unit two drives the fermentation tank to rotate on the support frame; the rotation of the fermentation tank in cooperation with the rotation of the blades can enable the substrate in the fermentation tank to be better flipped, stirred, and mixed, greatly improving the stirring and mixing effect of the substrate.

[0014] Through the arrangement of the cleaning unit in the present invention, it is possible to clean the gaps at the connection between the stirring shaft and the shaft seal and the lower end surface of the connection between the stirring shaft and the blades, and it is possible to avoid mildew caused by residue of the substrate in the fermentation tank, which affects the next fermentation. Description of the Drawings

[0015] Figure 1 is a diagram for explaining the background art of the present invention; Figure 2 is a schematic diagram of the overall structure of the present invention; Figure 3 is a schematic sectional view of the overall structure of the present invention; Figure 4 is a schematic diagram of the structure of the stirring shaft, shaft seal, and cleaning unit of the present invention; Figure 5 is a schematic sectional view of the connection relationship and installation relationship of the stirring shaft, cleaning unit, and pipeline of the present invention; Figure 6 is Figure 5 a partial enlarged view of A in Figure 7 is Figure 5 a partial enlarged view of B in Figure 8 is a schematic bottom view of a part of the structure of the present invention; Figure 9 is a schematic diagram of the pipeline structure of the present invention; Figure 10 is a schematic diagram of the cleaning block structure of the present invention; Figure 11 is a schematic diagram of the working principle of the sliding column and the cleaning block of the present invention; Figure 12 is a schematic diagram of the working state of the cleaning block of the present invention.

[0016] The reference numerals are as follows: 1 - Base, 2 - Support frame, 3 - Fermentation tank, 4 - Mounting frame, 5 - Stirring shaft, 6 - Shaft seal, 7 - Cleaning block, 8 - Cleaning cavity, 9 - Sliding column, 10 - Spring one, 11 - Wedge-shaped push block, 12 - Sealing block, 13 - Pipeline, 14 - Spring two, 15 - Motor one, 16 - Motor two, 17 - Sprocket one, 18 - Chain, 19 - Sprocket two, 20 - Feeding port, 21 - Blade, 22 - Sealing ring. Detailed Embodiments

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1 - 12 , the present invention provides a technical solution: a yeast fermentation and enzymolysis device, including a base 1, a support frame 2, a fermentation tank 3, a mounting frame 4, a stirring shaft 5, a shaft seal 6, a driving unit one, a driving unit two, and a cleaning unit; the support frame 2 is fixedly installed on the top of the base 1 and is used to support the fermentation tank 3; the outer side wall of the fermentation tank 3 is fixedly connected with a mounting frame 4 and is rotatably installed on the top of the base 1; the stirring shaft 5 is of a hollow structure and is rotatably installed inside the fermentation tank 3, and a plurality of blades 21 are installed on the side surface of the stirring shaft 5; the shaft seal 6 is installed on the stirring shaft 5 and is used for the support of the stirring shaft 5 and the sealing of the connection between the fermentation tank 3 and the stirring shaft 5; the driving unit one is arranged on the top of the fermentation tank 3 and is used to drive the stirring shaft 5 to rotate; the driving unit two is arranged on the top of the base 1 and is used to drive the fermentation tank 3 to rotate; the cleaning unit is arranged inside the stirring shaft 5 and can clean the connection between the stirring shaft 5 and the blades 21 and the inner gap of the shaft seal 6.

[0019] Refer to Figures 2 - 3 , yeast and substrates are added into the fermentation tank 3 through the feeding port 20 provided at the top end of the fermentation tank 3, and then the feeding port 20 is closed; when stirring is required, the driving unit one drives the stirring shaft 5 to rotate, and the stirring shaft 5 drives the blades 21 to rotate synchronously to stir the substrates; at the same time, the driving unit two drives the fermentation tank 3 to rotate on the support frame 2; the self-rotation of the fermentation tank 3 in cooperation with the rotation of the blades 21 can make the substrates in the fermentation tank 3 better flip, stir, and mix, which can greatly improve the stirring and mixing effect of the substrates; when fermentation is completed, the feeding port 20 is opened, and the driving unit two drives the fermentation tank 3 to flip so that the feeding port 20 faces downward, and the substrates in the fermentation tank 3 can fall out from the feeding port 20; then the cleaning unit starts to work to clean the gaps at the connection between the stirring shaft 5 and the shaft seal 6 and the residual substrate residues on the lower end surface at the connection between the stirring shaft 5 and the blades 21, which can avoid mildew caused by substrate residues in the fermentation tank 3 and affect the next fermentation; since the cleaning unit is arranged inside the stirring shaft 5, it can rotate together with the stirring shaft 5 when the cleaning unit is not working, which can avoid affecting the normal operation of the stirring shaft 5 and other components in the fermentation tank 3; it should be noted that the cleaning unit focuses on cleaning the difficult-to-clean residues remaining in the gaps at the connection between the stirring shaft 5 and the shaft seal 6 and the dead corners on the lower end surface at the connection between the stirring shaft 5 and the blades 21. For other areas without dead corners on the inner wall of the fermentation tank 3, they can be cleaned by flushing directly with a water pipe.

[0020] Specifically, as Figures 3 - 8 , Figure 11 and Figure 12 shown, the cleaning unit includes a cleaning block 7, a pipeline 13 and a driving part; the cleaning block 7 is elastically slidably connected to the stirring shaft 5 along the radial direction of the stirring shaft 5 and there are multiple of them; the multiple cleaning blocks 7 are evenly distributed on the stirring shaft 5; two symmetrically arranged cleaning cavities 8 are formed inside the cleaning block 7, and the cleaning cavities 8 communicate with the inner cavity of the stirring shaft 5; the pipeline 13 is fixedly connected to the fermentation tank 3 and one end thereof can be docked with the bottom end of the stirring shaft 5; the driving part can drive the cleaning block 7 to slide outward along the stirring shaft 5 when the pipeline 13 is docked with the stirring shaft 5, so that the cleaning cavity 8 is exposed.

[0021] When the cleaning unit works, one end of the pipeline 13 is inserted into the bottom end of the stirring shaft 5, and the pipeline 13 communicates with the inner cavity of the stirring shaft 5; when the pipeline 13 is docked with the bottom end of the stirring shaft 5, the driving part can drive the cleaning block 7 to slide outward along the stirring shaft 5, and one end of the cleaning cavity 8 far from the inner cavity of the stirring shaft 5 moves to the outside of the stirring shaft 5; it should be noted that, as Figure 12 shown, when the cleaning block 7 moves to the outermost position outward, the port of the cleaning cavity 8 just completely moves out; then cleaning water is injected into the pipeline through the other end of the pipeline 13, and the cleaning water enters the inner cavity of the stirring shaft 5 along the pipeline 13; after the cleaning water fills the inner cavity of the stirring shaft 5, it enters the cleaning cavity 8 and sprays out from the outer end of the cleaning cavity 8; as Figure 4 and Figure 5 shown, a plurality of cleaning blocks 7 are evenly arranged on the stirring shaft 5, and the cleaning blocks 7 are located between the shaft seal 6 and the blade 21; the cleaning water sprayed out from the cleaning cavities 8 above the topmost cleaning block 7 and below the bottommost cleaning block 7 can be sprayed onto the outer wall of the stirring shaft 5 and then into the gap between the shaft seal 6 and the stirring shaft 5, flushing away the substrate residues remaining in the gap; the cleaning water sprayed out from the cleaning cavity 8 in the cleaning block 7 in the middle area of the stirring shaft 5 can be sprayed onto the area where the stirring shaft 5 is connected to the blade 21, flushing away the substrate residues remaining at the connection; it can avoid the residues of the fermented substrate remaining in the dead corners in the fermentation tank 3 and affecting the next fermentation.

[0022] Specifically, as Figures 5 - 7 , Figure 11 and Figure 12 shown, the driving part includes a sliding column 9; the sliding column 9 is installed inside the stirring shaft 5 and is elastically slidably connected to the stirring shaft 5 in the vertical direction; a plurality of wedge-shaped push blocks 11 are fixedly connected to the outer side wall of the sliding column 9, the number of wedge-shaped push blocks 11 is equal to the number of cleaning blocks 7 and they are respectively located on the sides of the cleaning blocks 7; the wedge-shaped push blocks 11 can drive the cleaning blocks 7 to slide outward.

[0023] When one end of the pipeline 13 is inserted into the bottom end of the stirring shaft 5, the end of the pipeline 13 jacks up the sliding column 9; referring to Figure 11, when the sliding column 9 drives the wedge-shaped push block 11 to move upward in the v1 direction, the wedge-shaped push block 11 can drive the cleaning block 7 to move outward in the v2 direction through the wedge-shaped surface until the cleaning block 7 moves to Figure 12 the position shown, the cleaning cavity 8 moves out, and the cleaning water can be sprayed from the cleaning cavity to wash the dead corners existing on the stirring shaft 5, the blades 21 and the shaft seal 6.

[0024] It should be noted that the elastic sliding connection (installation) described above refers to a structure in which the part can automatically reset after sliding, including using the spring structure shown in the figure, but not limited to the spring structure; such as Figure 6 and Figure 10 shown, a first spring 10 is connected to the inner wall of the cleaning block 7, and one end of the first spring 10 away from the cleaning block 7 is connected to the inner wall of the stirring shaft 5; as Figure 6 shown, the top end of the sliding column 9 is connected to a second spring 14, and one end of the second spring 14 away from the sliding column 9 is connected to the inner wall of the top of the stirring shaft; the first spring 10 and the second spring 14 are respectively used for the automatic reset of the cleaning block 7 and the sliding column 9.

[0025] Specifically, as Figure 7 shown, a sealing ring 22 is fixedly installed at the bottom end of the sliding column 9, and the sealing ring 22 can cooperate with the sliding column 9 to seal the bottom opening of the stirring shaft 5.

[0026] When the pipeline 13 is not working, under the downward pre-tightening force applied by the second spring 14 to the sliding column 9, the lower end surface of the sealing ring 22 is in close contact with the bottom inner wall of the stirring shaft 5; the sliding column 9 can cooperate with the sealing ring 22 to keep the bottom end of the stirring shaft 5 in a sealed state, which can ensure that the setting of the cleaning unit does not affect the sealing of the fermentation tank 3; as Figure 9 shown, when the pipeline 13 is docked with the bottom end of the stirring shaft 5, the pipeline 13 can push the sliding column 9 upward, and a notch is provided at the end of the pipeline 13, and the cleaning water can enter the stirring shaft 5 from the notch; it should be noted that the docking of the pipeline 13 and the stirring shaft 5 can be realized by a linear driving mechanism (such as a cylinder, a linear motor, etc.), or manually, which is relatively simple and will not be elaborated here; optionally, the pipeline 13 can also be used as a channel for injecting gas (such as oxygen) into the fermentation tank 3, and the gas is sprayed into the fermentation material through the inner cavity of the stirring shaft 5 and the cleaning cavity 8.

[0027] Specifically, as Figure 10 shown, the cleaning cavity 8 is arranged in the shape of a tapered nozzle with a wide inner end and a narrow outer end; it can increase the speed of the cleaning water when it is sprayed from the cleaning cavity 8 and improve the scouring force on the residues at the gaps and joints.

[0028] Specifically, as Figure 10 and Figure 12 shown, a sealing block 12 is arranged in the cleaning cavity 8, the sealing block 12 can block the cleaning cavity 8, and the sealing block 12 is slidably connected with the cleaning block 7 in the vertical direction.

[0029] refer to Figure 12 , Figure 12 The shaded part in the middle indicates the cleaning water filling area. The sealing block 12 in the upper cleaning chamber 8 blocks the upper cleaning chamber 8 under the action of gravity, and the sealing block 12 in the lower cleaning chamber 8 moves downward to the lowest point under the action of gravity, and the lower cleaning chamber 8 is in an open state; the number of cleaning chambers 8 opened can be reduced, and the speed of cleaning water spraying out of the cleaning chamber 8 can be increased, and only the lower cleaning chamber 8 is always in an open state, and the cleaning water is sprayed downward, and the cleaning water sprayed from the two adjacent cleaning blocks 7 does not interact with each other, which can greatly improve the cleaning effect; the driving unit 2 then drives the fermentation tank 3 to rotate. When the fermentation tank 3 is turned over 180°, the two cleaning chambers 8 in the cleaning block 7 exchange positions. Under the blocking action of the sealing block 12, the two cleaning chambers 8 are intermittently opened, and the cleaning water is always sprayed downward, which does not affect the cleaning effect.

[0030] Specifically, Figure 2 As shown, the driving unit 1 includes a motor 15, which is installed on the top of the fermentation tank 3 and has an output shaft fixedly connected to the stirring shaft 5; the motor 15 can drive the stirring shaft 5 to rotate.

[0031] Specifically, Figure 2 As shown, the driving unit 2 includes a motor 2 16, which is installed on the top of the base 1 and has a sprocket 17 fixedly connected to its output shaft, which is connected to a sprocket 2 19 via a chain 18; the sprocket 2 19 is fixedly installed on the rotating shaft of the fermentation tank 3; the motor 2 16 can drive the fermentation tank 3 to rotate via the sprocket 1 17, the chain 18 and the sprocket 2 19.

[0032] A yeast fermentation enzymolysis method, the method comprising the following steps: Step 1: Add yeast and substrate into the fermentation tank 3; Step 2: The driving unit 1 drives the stirring shaft 5 to rotate, stirring the yeast and substrate in the fermentation tank 3 to promote fermentation; Step 3: After fermentation is completed, the substrate is taken out from the fermentation tank 3; Step 4: The cleaning unit inside the stirring shaft 5 starts to work, cleaning the gap between the stirring shaft 5 and the shaft seal 6 and the residue remaining in the dead corner of the lower end surface where the stirring shaft 5 is connected to the blade 21; Step 5: flushing other areas of the inner wall of the fermentation tank 3 without dead corners by direct flushing with a water pipe; Step 6: Dry the fermentation tank 3 and then seal it for storage.

[0033] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A yeast fermentation and enzymatic hydrolysis device, comprising a base (1), characterized in that: It further includes a fermentation tank (3), rotatably installed on the top of the base (1); a stirring shaft (5), which is of a hollow structure and rotatably installed inside the fermentation tank (3), and a plurality of blades (21) are installed on the side of the stirring shaft (5); a shaft seal (6), installed on the stirring shaft (5) and used for supporting the stirring shaft (5) and sealing the connection between the fermentation tank (3) and the stirring shaft (5); a first driving unit, arranged on the top of the fermentation tank (3) and used for driving the stirring shaft (5) to rotate; a second driving unit, arranged on the top of the base (1) and used for driving the fermentation tank (3) to rotate; a cleaning unit, arranged inside the stirring shaft (5) and capable of cleaning the connection between the stirring shaft (5) and the blades (21) and the inner gap of the shaft seal (6).

2. The yeast fermentation and enzymatic hydrolysis device according to claim 1, wherein: The cleaning unit includes a cleaning block (7), a pipeline (13) and a driving part; the cleaning block (7) is elastically slidably connected with the stirring shaft (5) along the radial direction of the stirring shaft (5), and a plurality of cleaning blocks (7) are provided; the plurality of cleaning blocks (7) are evenly distributed on the stirring shaft (5); two symmetrically arranged cleaning cavities (8) are formed inside the cleaning block (7), and the cleaning cavities (8) are communicated with the inner cavity of the stirring shaft (5); the pipeline (13) is fixedly connected with the fermentation tank (3) and one end of the pipeline can be butted with the bottom end of the stirring shaft (5); the driving part can drive the cleaning block (7) to slide outward relative to the stirring shaft (5) when the pipeline (13) is butted with the stirring shaft (5), so that the cleaning cavity (8) is exposed.

3. The yeast fermentation and enzymatic hydrolysis device according to claim 2, characterized in that: The driving part includes a sliding column (9); the sliding column (9) is installed inside the stirring shaft (5) and is elastically slidably connected with the stirring shaft (5) in the vertical direction; a plurality of wedge-shaped pushing blocks (11) are fixedly connected to the outer side wall of the sliding column (9), the number of the wedge-shaped pushing blocks (11) is equal to the number of the cleaning blocks (7) and are respectively located on the sides of the cleaning blocks (7); the wedge-shaped pushing blocks (11) can drive the cleaning blocks (7) to slide outward.

4. A yeast fermentation and enzymatic hydrolysis device according to claim 3, characterized in that: A sealing ring (22) is fixedly installed at the bottom end of the sliding column (9), and the sealing ring (22) can cooperate with the sliding column (9) to seal the bottom opening of the stirring shaft (5).

5. The yeast fermentation and enzymatic hydrolysis device according to claim 2, characterized in that: The cleaning cavity (8) is arranged in a shape of a tapered nozzle with a wider inner end and a narrower outer end.

6. The yeast fermentation and enzymatic hydrolysis device according to claim 2, characterized in that: A sealing block (12) is arranged inside the cleaning cavity (8), the sealing block (12) can block the cleaning cavity (8), and the sealing block (12) is slidably connected with the cleaning block (7) in the vertical direction.

7. A yeast fermentation and enzymatic hydrolysis device according to claim 1, characterized in that: The first driving unit includes a first motor (15), the first motor (15) is installed on the top of the fermentation tank (3) and the output shaft is fixedly connected with the stirring shaft (5).

8. A yeast fermentation and enzymatic hydrolysis device according to claim 1, characterized in that: The second driving unit includes a second motor (16), the second motor (16) is installed on the top of the base (1) and a first sprocket (17) is fixedly connected to the output shaft, the first sprocket (17) is drivingly connected with a second sprocket (19) through a chain (18); the second sprocket (19) is fixedly installed on the rotating shaft of the fermentation tank (3).

9. A yeast fermentation and enzymatic hydrolysis method, applicable to the yeast fermentation and enzymatic hydrolysis device described in any one of claims 1-8, characterized in that, The method includes the following steps: Step 1: Add yeast and substrate into the fermentation tank (3); Step 2: The first driving unit drives the stirring shaft (5) to rotate to stir the yeast and substrate in the fermentation tank (3) to promote fermentation; Step 3: After fermentation is completed, take out the substrate from the fermenter (3). Step 4: The cleaning unit inside the stirring shaft (5) starts to work to clean the residue remaining in the gap at the connection between the stirring shaft (5) and the shaft seal (6) and at the dead corner of the lower end surface at the connection between the stirring shaft (5) and the blade (21). Step 5: Flush the other non-dead corners of the inner wall of the fermenter (3) by directly flushing with a water pipe. Step 6: Dry the fermenter (3) and then store it in a sealed manner.

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