Fully-automatic integrated fermentation apparatus and method

Abstract

The present invention relates to the field of fermentation apparatuses, and specifically to a fully-automatic integrated fermentation apparatus and method. The fully-automatic integrated fermentation apparatus comprises a fermentation tank for fermentation, and further comprises a reinforcement ring which runs through the top of the fermentation tank and a cylinder a which vertically passes through the reinforcement ring, wherein a bearing a is provided between the cylinder a and the reinforcement ring, and a power assembly for driving the cylinder a to rotate is provided on the fermentation tank; a stirring mechanism is provided on an outer wall of the cylinder a, the stirring mechanism being located in the fermentation tank; and a sliding member is fitted and sleeved on the stirring mechanism, a cleaning assembly for driving the sliding member to slide along the stirring mechanism is provided on the fermentation tank, and when moving up and down, the cleaning assembly sprays water to the sliding member and to the inner wall of the fermentation tank. In the present invention, automatic cleaning can completely cover all areas for fermentation, thus reducing manual labor intensity while improving cleaning effects.

Description

Fully automatic integrated fermentation equipment and method Technical Field

[0001] The present invention relates to the field of fermentation equipment, and in particular to a fully automatic integrated fermentation equipment and method. Background Art

[0002] Fermentation equipment is used to encourage the growth and reproduction of microorganisms under controlled conditions, resulting in specific chemical changes or products. Fermentation processes are widely used in the food industry, biotechnology, pharmaceuticals, brewing, dairy products, and chemical industries. Technical issues

[0003] Chinese patent publication number CN215855836U discloses a three-dimensional integrated anaerobic fermentation device, which facilitates cleaning of the inner wall of the fermentation box by providing a reciprocating screw, a cleaning ring, a scraper and other structures, thereby facilitating the next fermentation process.

[0004] However, the above-mentioned disclosed solutions have the following shortcomings: the agitator is located inside the fermentation tank, has a complex structure and a hidden position, making it difficult for automatic cleaning to fully cover all areas of the fermentation tank. The main reason is that the stirring structure cannot complete automatic cleaning and needs to be manually rinsed or disassembled for cleaning, which is troublesome to use and cannot achieve comprehensive automatic cleaning. Technical Solutions

[0005] The present invention aims to address the problem in the background art that fermentation tanks cannot be automatically and thoroughly cleaned, and to propose a fully automatic integrated fermentation device and method.

[0006] The technical solution of the present invention is: a fully automatic integrated fermentation equipment and method, including a fermentation tank used for fermentation, which realizes the addition of raw materials and gas and completes pressure relief; also includes a reinforcement ring arranged through the top of the fermentation tank and a cylinder a vertically passing through the reinforcement ring, a bearing a is arranged between the cylinder a and the reinforcement ring, a power component for driving the cylinder a to rotate is provided on the fermentation tank, a stirring mechanism is provided on the outer wall of the cylinder a, the stirring mechanism is located in the fermentation tank, a sliding part is fitted on the stirring mechanism, and a cleaning component is provided on the fermentation tank for driving the sliding part to slide along the stirring mechanism, and water is sprayed onto the sliding part and the inner wall of the fermentation tank during the up and down movement of the cleaning component.

[0007] Preferably, a temperature control mechanism is provided on the outer wall of the fermentation tank, a heating unit and a cooling unit are provided in the temperature control mechanism, a temperature sensor is provided on the inner wall of the fermentation tank, multiple sets of supporting legs are provided at the bottom of the fermentation tank, a feeding mechanism, an air supply pipe and a pressure relief valve are provided at the top of the fermentation tank, an electromagnetic valve a is provided on the air supply pipe, a discharge pipe and a discharge component for sealing or opening the discharge pipe are provided at the bottom of the fermentation tank; the temperature sensor is connected to the control system for signal transmission, and the control system is controlled and connected to the electromagnetic valve a and the temperature control mechanism.

[0008] Preferably, the discharge assembly includes a sealing plug arranged in the discharge pipe and a connecting frame connected to the sealing plug, a connecting plate is arranged on the top of the connecting frame, a telescopic device is vertically arranged at the bottom of the connecting plate, a mounting frame a is arranged at the bottom of the telescopic device, and the mounting frame a is arranged on the outer wall of the bottom of the fermentation tank.

[0009] Preferably, the power assembly includes a gear a arranged on the outer wall of the cylinder a, a gear b meshing with the gear a, and a motor driving the gear b to rotate, and also includes a mounting frame b for mounting the motor, and the mounting frame b is arranged on the outer wall of the top of the fermentation tank.

[0010] Preferably, the cleaning assembly includes a cylinder b with its bottom inserted into the cylinder a, a water supply pipe with its bottom inserted into the cylinder b, and a lifting unit that drives the water supply pipe to move up and down; the top of the cylinder b is connected to the mounting frame b, a bearing b is arranged between the cylinder b and the cylinder a, a connecting pipe is arranged on the top of the water supply pipe, the connecting pipe is connected to the high-pressure water supply source, a spherical shell is arranged at the bottom of the water supply pipe, a plurality of water outlet holes are arranged on the spherical shell, a connecting rope is arranged on the spherical shell, and the connecting rope is connected to the sliding member; the control system is controlled and connected to the lifting unit.

[0011] Preferably, the lifting unit includes a vertical plate arranged on the mounting frame b, a rodless cylinder vertically arranged on the vertical plate, and a lifting plate connected to the sliding part of the rodless cylinder, and the lifting plate is connected to the top of the water supply pipe.

[0012] Preferably, the stirring mechanism is a spiral stirring rod a, the top of the stirring rod a is connected to the outer wall of the bottom of the cylinder a through a connecting rod, and the sliding member is a ball a sleeved on the stirring rod a, and the ball a is connected to the bottom of the connecting rope.

[0013] Preferably, the stirring mechanism is an arc-shaped stirring rod b, the top of the stirring rod b is connected to the bottom outer wall of the cylinder a, and the sliding member is a ball b sleeved on the stirring rod b, and the ball b is connected to the bottom of the connecting rope.

[0014] Preferably, multiple groups of stirring rods b are provided, and the multiple groups of stirring rods b are evenly distributed along the circumferential direction with the fermentation tank axis as the center; multiple groups of balls b and connecting ropes are provided in combination, the tops of the multiple groups of connecting ropes are connected to the spherical shells, and the bottoms of the multiple groups of connecting ropes are respectively connected to the multiple groups of balls b.

[0015] Preferably, it also includes a water ring arranged on the outer wall of the fermentation tank and a plurality of nozzles arranged on the inner wall of the water ring and extending into the fermentation tank, the nozzles spray water toward the middle and top inner wall of the fermentation tank, a water inlet pipe is arranged on the water ring, the water inlet pipe is connected to the high-pressure water source, a solenoid valve b is arranged on the water inlet pipe, and the control system is controlled and connected to the solenoid valve b. Beneficial effects

[0016] Compared with the existing technology, the present invention has the following beneficial technical effects: the stirring mechanism can be quickly cleaned by the sliding part, and combined with the nozzle, the cleaning work after fermentation can be automatically and comprehensively completed. The automatic cleaning can completely cover all areas of fermentation, reducing the labor intensity, improving the cleaning effect, and thus improving the fermentation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic structural diagram of an embodiment of the present invention;

[0018] FIG2 is an axonometric view of FIG1 ;

[0019] Figure 3 is a schematic structural diagram of the water ring;

[0020] FIG4 is a schematic diagram of a portion of the structure of FIG1 ;

[0021] Figure 5 is a schematic diagram of the internal structure of the fermentation tank;

[0022] FIG6 is an enlarged schematic diagram of point A in FIG5 ;

[0023] FIG7 is a schematic structural diagram of Example 5;

[0024] FIG8 is a schematic structural diagram of the sixth embodiment.

[0025] Figure numerals: 1, fermentation tank; 2, supporting leg; 3, feeding mechanism; 4, air supply pipe; 5, pressure relief valve; 6, discharge pipe; 7, sealing plug; 8, mounting bracket a; 9, telescopic device; 10, connecting plate; 11, connecting bracket; 12, temperature control mechanism; 13, reinforcing ring; 14, bearing a; 15, cylinder a; 16, gear a; 17, gear b; 18, motor; 19, mounting bracket b; 20, bearing b; 21, cylinder b; 22, water supply pipe; 23, ball shell; 24, connecting rope; 25, vertical plate; 26, rodless cylinder; 27, lifting plate; 28, connecting pipe; 29, stirring rod a; 30, connecting rod; 31, sleeve ball a; 32, stirring rod b; 33, sleeve ball b; 34, water ring; 35, nozzle; 36, water inlet pipe; 37, solenoid valve a; 38, solenoid valve b. Modes for Carrying Out the Invention Example 1

[0026] As shown in Figures 1 and 2, the present invention proposes a fully automatic integrated fermentation equipment, including a fermentation tank 1 for fermentation, which realizes the addition of raw materials and gas and completes pressure relief; it also includes a reinforcement ring 13 that passes through the top of the fermentation tank 1 and a cylinder a15 that vertically passes through the reinforcement ring 13, and a bearing a14 is arranged between the cylinder a15 and the reinforcement ring 13. The fermentation tank 1 is provided with a power component that drives the cylinder a15 to rotate, and a stirring mechanism is arranged on the outer wall of the cylinder a15. The stirring mechanism is located in the fermentation tank 1, and a sliding member is fitted on the stirring mechanism. The fermentation tank 1 is provided with a cleaning component that drives the sliding member to slide along the stirring mechanism, and water is sprayed onto the sliding member and the inner wall of the fermentation tank 1 during the up and down movement of the cleaning component.

[0027] As shown in Figure 3, it further includes a water ring 34 arranged on the outer wall of the fermentation tank 1 and a plurality of nozzles 35 arranged on the inner wall of the water ring 34 and extending into the fermentation tank 1. The nozzles 35 spray water toward the middle and top inner wall of the fermentation tank 1. A water inlet pipe 36 is arranged on the water ring 34, and the water inlet pipe 36 is connected to a high-pressure water source. A solenoid valve b38 is arranged on the water inlet pipe 36, and the control system is controlled and connected to the solenoid valve b38.

[0028] Working principle: The raw materials to be fermented are fed into the fermentation tank 1. During the fermentation process, the required gas and temperature are controlled and the pressure is automatically released. After the fermentation is completed, the fermented materials are discharged. Before the next fermentation, the fermentation tank 1 needs to be cleaned. High-pressure water is fed into the water inlet pipe 36. The water is sprayed out through the nozzle 35. The nozzle 35 sprays water to the middle and top inner wall of the fermentation tank 1 to complete the cleaning of the top inner wall of the fermentation tank 1. At the same time, the cleaning component drives the sliding part to move up and down, and the stirring mechanism is automatically cleaned by the sliding part. After the cleaning is completed, the cleaning component returns to the initial position. After the cleaning sewage is discharged, the fermentation work can be resumed after the interior of the fermentation tank 1 is dried.

[0029] In this embodiment, the stirring mechanism is quickly cleaned by the sliding part, and combined with the nozzle 35, the post-fermentation cleaning work can be automatically and comprehensively completed. The automatic cleaning can completely cover all areas of the fermentation, reducing the intensity of manual labor, improving the cleaning effect, and thus improving the fermentation efficiency. Example 2

[0030] As shown in Figure 1, the fully automatic integrated fermentation equipment proposed by the present invention, compared with Example 1, has a temperature control mechanism 12 provided on the outer wall of the fermentation tank 1, a heating unit and a cooling unit provided in the temperature control mechanism 12, a temperature sensor provided on the inner wall of the fermentation tank 1, a plurality of support legs 2 provided at the bottom of the fermentation tank 1, a feeding mechanism 3, an air supply pipe 4 and a pressure relief valve 5 provided at the top of the fermentation tank 1, a solenoid valve a37 provided on the air supply pipe 4, a discharge pipe 6 and a discharge component for sealing or opening the discharge pipe 6 provided at the bottom of the fermentation tank 1; the temperature sensor is connected to the control system for signal transmission, and the control system is controlled and connected to the solenoid valve a37 and the temperature control mechanism 12.

[0031] As shown in Figure 2, the discharge assembly includes a sealing plug 7 that is cooperatively arranged in the discharge pipe 6 and a connecting frame 11 connected to the sealing plug 7. A connecting plate 10 is arranged on the top of the connecting frame 11, and a telescopic device 9 is vertically arranged at the bottom of the connecting plate 10. A mounting frame a8 is arranged at the bottom of the telescopic device 9, and the mounting frame a8 is arranged on the bottom outer wall of the fermentation tank 1.

[0032] In this embodiment, the feed mechanism 3 is used for feeding and sealing. The air delivery pipe 4 is used to deliver the gases required for fermentation, such as oxygen, carbon dioxide, and inert gas, depending on the fermentation conditions. The pressure relief valve 5 automatically relieves pressure to ensure safe fermentation. When discharge or wastewater removal is required, the telescopic device 9 contracts, driving the sealing plug 7 to move below the discharge pipe 6. Example 3

[0033] As shown in Figures 1, 4 and 6, the fully automatic integrated fermentation equipment proposed by the present invention, compared with Example 1, the power assembly includes a gear a16 arranged on the outer wall of the cylinder a15, a gear b17 engaged with the gear a16, and a motor 18 that drives the gear b17 to rotate, and also includes a mounting bracket b19 for mounting the motor 18, and the mounting bracket b19 is arranged on the top outer wall of the fermentation tank 1.

[0034] The cleaning assembly includes a cylinder b21 whose bottom is inserted into the cylinder a15, a water supply pipe 22 whose bottom is inserted into the cylinder b21, and a lifting unit that drives the water supply pipe 22 to move up and down; the top of the cylinder b21 is connected to the mounting frame b19, a bearing b20 is arranged between the cylinder b21 and the cylinder a15, a connecting pipe 28 is arranged at the top of the water supply pipe 22, the connecting pipe 28 is connected to the high-pressure water supply source, a spherical shell 23 is arranged at the bottom of the water supply pipe 22, a plurality of water outlet holes are arranged on the spherical shell 23, a connecting rope 24 is arranged on the spherical shell 23, and the connecting rope 24 is connected to the sliding part; the control system is controlled and connected to the lifting unit.

[0035] The lifting unit includes a vertical plate 25 set on the mounting frame b19, a rodless cylinder 26 vertically set on the vertical plate 25, and a lifting plate 27 connected to the sliding part of the rodless cylinder 26. The lifting plate 27 is connected to the top of the water supply pipe 22.

[0036] In this embodiment, motor 18 rotates gear b17, which in turn rotates the stirring mechanism via gear a16 and cylinder a15, stirring the fermented product and ensuring a smooth fermentation. During cleaning, rodless cylinder 26 moves water pipe 22 and spherical shell 23 up and down. Simultaneously, spherical shell 23 moves the sliding member up and down via connecting cable 24. The sliding member cleans the stirring mechanism, and combined with the water spray from spherical shell 23 and nozzle 35, the cleaning process is completed automatically and comprehensively. Example 4

[0037] As shown in Figure 5, the fully automatic integrated fermentation equipment proposed by the present invention, compared with Example 3, the stirring mechanism is a spiral stirring rod a29, the top of the stirring rod a29 is connected to the bottom outer wall of the cylinder a15 through a connecting rod 30, and the sliding part is a ball a31 sleeved on the stirring rod a29, and the ball a31 is connected to the bottom of the connecting rope 24.

[0038] In this embodiment, the spiral stirring rod a29 can ensure that the fermentation material is fully stirred. When cleaning the stirring rod a29, the ball a31 slides along the stirring rod a29 to complete the cleaning of the outer wall of the stirring rod a29. At the same time, the ball a31 is cleaned by spraying water through the ball shell 23, and the material scraped from the stirring rod a29 by the ball a31 is washed away. When the ball shell 23 is at the lowest point, the ball a31 contacts the inner wall of the bottom of the fermentation tank 1, ensuring that the stirring rod a29 is fully cleaned. Example 5

[0039] As shown in Figure 7, the fully automatic integrated fermentation equipment proposed by the present invention, compared to Example 3, has a stirring mechanism comprising a curved stirring rod b32, the top of which is connected to the bottom outer wall of the barrel a15. The sliding member is a ball b33 that fits over the stirring rod b32 and is connected to the bottom of the connecting cable 24. The curved shape of the stirring rod b32 offers a simple structure and ease of manufacture. When the ball shell 23 is at its lowest point, the ball b33 contacts the bottom inner wall of the fermentation tank 1, ensuring thorough cleaning of the stirring rod b32. Example 6

[0040] As shown in Figure 8, the fully automatic integrated fermentation equipment proposed by the present invention, compared with Example 5, has multiple groups of stirring rods b32, and the multiple groups of stirring rods b32 are evenly distributed along the circumferential direction with the axis of the fermentation tank 1 as the center; the sets of balls b33 and connecting ropes 24 are both provided in multiple groups, the tops of the multiple groups of connecting ropes 24 are connected to the ball shells 23, and the bottoms of the multiple groups of connecting ropes 24 are respectively connected to the multiple groups of balls b33.

[0041] In this embodiment, a single stirring rod b32 is arc-shaped, has a simple structure, and is easy to produce. Multiple stirring rods b32 can improve the stirring effect. The specific number required is determined according to actual conditions. The more stirring rods b32 there are, the better the stirring effect. When the ball shell 23 is at the lowest point, the ball b33 contacts the inner wall of the bottom of the fermentation tank 1 to ensure that the stirring rod b32 is fully cleaned. Example 7

[0042] The fermentation method based on the above-mentioned embodiment of the fully automatic integrated fermentation equipment includes the following steps:

[0043] S1, the raw materials to be fermented are fed into the fermentation tank 1 through the feeding mechanism 3, the gas required for the fermentation process is fed through the air supply pipe 4, the pressure is automatically released by the pressure relief valve 5 if the air pressure is too high during the fermentation process, and the fermentation temperature is dynamically controlled by the temperature control mechanism 12;

[0044] S2. After the fermentation is completed, the seal of the discharge pipe 6 is opened to discharge the fermented material;

[0045] S3. High-pressure water is fed into the connecting pipe 28 and the water inlet pipe 36. The water is ejected through the spherical shell 23 and the nozzle 35. The spherical shell 23 sprays water to the surrounding area and the bottom, and the nozzle 35 sprays water to the middle and top inner wall of the fermentation tank 1;

[0046] S4, the rodless cylinder 26 drives the water supply pipe 22 to move up and down, and the connecting rope 24 pulls the sliding member to move up and down along the stirring mechanism to complete the cleaning of the stirring mechanism. At the same time, the ball shell 23 and the nozzle 35 spray water outward to complete the automatic cleaning of the inner wall of the fermentation tank 1. After the cleaning is completed, the water supply pipe 22 moves to the highest position, that is, the initial position;

[0047] S5. After the cleaning wastewater is discharged through the discharge pipe 6, the fermentation work can be resumed after the internal drying is completed.

[0048] In this embodiment, the stirring mechanism is quickly cleaned by the sliding part, and combined with the nozzle 35, the post-fermentation cleaning work can be automatically and comprehensively completed. The automatic cleaning can completely cover all areas of the fermentation, reducing the intensity of manual labor, improving the cleaning effect, and thus improving the fermentation efficiency.

[0049] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A fully automatic integrated fermentation device, comprising a fermentation tank (1) for fermentation, wherein the fermentation tank (1) is used to add raw materials and gas and to release pressure; characterized in that: The fermentation tank (1) further comprises a reinforcing ring (13) penetrating the top of the fermentation tank (1) and a barrel a (15) vertically passing through the reinforcing ring (13); a bearing a (14) is arranged between the barrel a (15) and the reinforcing ring (13); a power assembly for driving the barrel a (15) to rotate is arranged on the fermentation tank (1); a stirring mechanism is arranged on the outer wall of the barrel a (15); the stirring mechanism is located in the fermentation tank (1); a sliding member is fitted on the stirring mechanism; a cleaning assembly for driving the sliding member to slide along the stirring mechanism is arranged on the fermentation tank (1); and water is sprayed onto the sliding member and the inner wall of the fermentation tank (1) during the upward and downward movement of the cleaning assembly.

2. The fully automatic integrated fermentation equipment according to claim 1, characterized in that: A temperature control mechanism (12) is arranged on the outer wall of the fermentation tank (1), a heating unit and a cooling unit are arranged in the temperature control mechanism (12), a temperature sensor is arranged on the inner wall of the fermentation tank (1), a plurality of support legs (2) are arranged at the bottom of the fermentation tank (1), a feeding mechanism (3), an air supply pipe (4) and a pressure relief valve (5) are arranged at the top of the fermentation tank (1), an electromagnetic valve a (37) is arranged on the air supply pipe (4), and a discharge pipe (6) and a discharge component for sealing or opening the discharge pipe (6) are arranged at the bottom of the fermentation tank (1); the temperature sensor is connected to the control system for signal transmission, and the control system is connected to the electromagnetic valve a (37) and the temperature control mechanism (12) for control.

3. The fully automatic integrated fermentation equipment according to claim 2, characterized in that: The discharge assembly comprises a sealing plug (7) arranged in cooperation with the discharge pipe (6) and a connecting frame (11) connected to the sealing plug (7); a connecting plate (10) is arranged on the top of the connecting frame (11); a telescopic device (9) is vertically arranged on the bottom of the connecting plate (10); a mounting frame a (8) is arranged on the bottom of the telescopic device (9); and the mounting frame a (8) is arranged on the bottom outer wall of the fermentation tank (1).

4. The fully automatic integrated fermentation equipment according to claim 1, characterized in that: The power assembly comprises a gear a (16) arranged on the outer wall of the cylinder a (15), a gear b (17) meshing with the gear a (16), and a motor (18) driving the gear b (17) to rotate, and also comprises a mounting frame b (19) for mounting the motor (18), wherein the mounting frame b (19) is arranged on the outer wall of the top of the fermentation tank (1).

5. The fully automatic integrated fermentation equipment according to claim 4, characterized in that: The cleaning assembly comprises a cylinder b (21) whose bottom is inserted into a cylinder a (15), a water supply pipe (22) whose bottom is inserted into the cylinder b (21), and a lifting unit for driving the water supply pipe (22) to move up and down; the top of the cylinder b (21) is connected to a mounting frame b (19), a bearing b (20) is arranged between the cylinder b (21) and the cylinder a (15), a connecting pipe (28) is arranged at the top of the water supply pipe (22), the connecting pipe (28) is connected to a high-pressure water supply source, a spherical shell (23) is arranged at the bottom of the water supply pipe (22), a plurality of water outlet holes are arranged on the spherical shell (23), a connecting rope (24) is arranged on the spherical shell (23), and the connecting rope (24) is connected to a sliding member; and a control system is control-connected to the lifting unit.

6. The fully automatic integrated fermentation equipment according to claim 5, characterized in that: The lifting unit comprises a vertical plate (25) arranged on the mounting frame b (19), a rodless cylinder (26) vertically arranged on the vertical plate (25), and a lifting plate (27) connected to the sliding part of the rodless cylinder (26), and the lifting plate (27) is connected to the top of the water supply pipe (22).

7. The fully automatic integrated fermentation equipment according to claim 5, characterized in that: The stirring mechanism is a spiral stirring rod a (29), the top of the stirring rod a (29) is connected to the bottom outer wall of the cylinder a (15) through a connecting rod (30), and the sliding member is a sleeve ball a (31) sleeved on the stirring rod a (29), and the sleeve ball a (31) is connected to the bottom of the connecting rope (24).

8. The fully automatic integrated fermentation equipment according to claim 5, characterized in that: The stirring mechanism is an arc-shaped stirring rod b (32), the top of the stirring rod b (32) is connected to the outer wall of the bottom of the cylinder a (15), and the sliding member is a sleeve ball b (33) sleeved on the stirring rod b (32), and the sleeve ball b (33) is connected to the bottom of the connecting rope (24).

9. The fully automatic integrated fermentation equipment according to claim 8, characterized in that: A plurality of stirring rods b (32) are arranged, and the plurality of stirring rods b (32) are evenly distributed along the circumferential direction with the axis of the fermentation tank (1) as the center; a plurality of sets of sleeve balls b (33) and connecting ropes (24) are arranged in cooperation with each other, and the tops of the plurality of sets of connecting ropes (24) are connected to the spherical shell (23), and the bottoms of the plurality of sets of connecting ropes (24) are respectively connected to the plurality of sets of sleeve balls b (33).

10. The fully automatic integrated fermentation equipment according to claim 1, characterized in that: The fermentation tank (1) further comprises a water ring (34) arranged on the outer wall of the fermentation tank (1) and a plurality of nozzles (35) arranged on the inner wall of the water ring (34) and extending into the fermentation tank (1), wherein the nozzles (35) spray water toward the middle and top inner wall of the fermentation tank (1), a water inlet pipe (36) is arranged on the water ring (34), the water inlet pipe (36) is connected to a high-pressure water source, a solenoid valve b (38) is arranged on the water inlet pipe (36), and a control system is control-connected to the solenoid valve b (38).

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