Microbial feed fermentation apparatus and fermentation method

Abstract

This invention relates to the field of microbial feed fermentation technology, and in particular provides a microbial feed fermentation device and fermentation method. The microbial feed fermentation device includes an outer casing and a fermentation tank disposed inside the outer casing. The fermentation tank has a feed pipe extending upwards from the top to the outside of the outer casing, and a discharge pipe at the bottom. A cavity is formed between the outer casing and the fermentation tank, and the cavity and the fermentation tank are independent sealed spaces. A stirrer is installed inside the fermentation tank. The inner end of the air inlet pipe is connected to the cavity. An air compensation pipe is connected to the fermentation tank, with one end connected to the cavity and the other end connected to the fermentation tank. Compressed air is pre-stored in the cavity, and unidirectional air replenishment is achieved using pressure difference. Aerobic gas can be preheated in the cavity. When aerobic gas is needed, the valve pipe on the fermentation tank is opened, allowing the preheated compressed air in the cavity to be injected unidirectionally into the fermentation tank, thus promoting the fermentation reaction.

Description

Technical Field

[0001] This invention relates to the field of microbial feed fermentation technology, and in particular to a microbial feed fermentation equipment and fermentation method. Background Technology

[0002] In the field of microbial feed production, the efficiency of microbial fermentation reaction directly determines the production cycle, yield and quality of feed. Aerobic microorganisms, as the core strains of microbial feed fermentation, are highly dependent on a sufficient oxygen supply for their activity and reproduction rate. Therefore, accelerating microbial fermentation reaction by rationally supplying aerobic gas is a key means to improve the production efficiency of microbial feed and reduce production costs.

[0003] However, existing fermentation equipment lacks an independent, sealed gas storage space between the fermenter and the external protective structure. It also lacks a preheating function when adding aerobic gas, and the external heating function occupies a large space. The built-in heating function and the one-way gas injection function are separate from each other, and internal intelligent control cannot be achieved when aerobic gas is injected into the fermenter. In addition, if materials need to be added during the fermentation process, the sealing state of the fermenter is easily damaged, affecting the continuity and stability of the fermentation process. Summary of the Invention

[0004] To address the above problems, the present invention provides the following technical solution: A microbial feed fermentation device includes an outer casing and a fermentation tank disposed inside the outer casing. A discharge pipe is provided at the bottom of the fermentation tank. A cavity is formed between the outer casing and the fermentation tank, and the cavity and the fermentation tank are independent sealed spaces. A stirrer is provided inside the fermentation tank. An air inlet pipe is connected to the outer casing, and the inner end of the air inlet pipe is connected to the cavity. An air compensation pipe is connected to the fermentation tank, one end of which is connected to the cavity, and the other end is connected to the fermentation tank. A first solenoid valve is provided on the air compensation pipe. An oxygen detection device is provided inside the fermentation tank. The sensor for gas content is also equipped with an intelligent control system for controlling the opening and closing of the first solenoid valve and the speed of the stirrer; multiple sealing structures are provided between the outer cover and the fermentation tank to ensure that the clamping cavity and the fermentation tank are not connected to each other and are sealed. The clamping cavity is a sealed cavity pre-stored with compressed air. When the first solenoid valve is opened, the compressed air in the clamping cavity can be released into the fermentation tank through the air compensation pipe. The fermentation tank is connected to a material compensation pipe, which extends to the outside of the outer cover and is equipped with a fourth solenoid valve that is electrically connected to the intelligent control system.

[0005] More preferably, the multiple sealing structures include a sealing bearing disposed at the connection between the top of the fermenter and the agitator, an isolation plate disposed between the bottom of the fermenter and the cavity wall, a connecting flange disposed at the top of the outer cover, and a first static sealing ring disposed at the top of the connecting flange for mounting the motor. The drive end of the agitator enters upward into the connecting flange and is connected to the output end of the motor. The intelligent control system includes a controller electrically connected to the motor.

[0006] More preferably, a second solenoid valve is installed on the air intake pipe, the second solenoid valve is electrically connected to the controller, and a gas pressure sensor is installed in the clamping cavity, the gas pressure sensor is electrically connected to the controller.

[0007] More preferably, the discharge pipe passes vertically upward through the partition plate into the fermentation tank, and a third solenoid valve is fixed on the discharge pipe.

[0008] More preferably, the stirrer includes a vertically arranged stirring shaft and multiple layers of stirring blades arranged on the stirring shaft, the inclination angles of the stirring blades in different layers are different, and one end of the air compensation pipe connected to the fermentation tank is perpendicular to the first layer of stirring blades above the stirrer.

[0009] More preferably, a second static sealing ring is connected between the bottom of the fermenter and the top surface of the isolation plate.

[0010] More preferably, a heating tube is installed inside the clamping cavity, a temperature adjustment device is fixed to the outer wall of the outer cover, the heating tube is electrically connected to the temperature adjustment device, and the temperature adjustment device is electrically connected to the controller.

[0011] The present invention also provides a method for fermenting microbial feed, using the microbial feed fermentation equipment described above, comprising the following steps: Step s01: Feeding and sealing: Feed materials and microbial agents to be fermented are fed into the fermentation tank through the feed pipe at the top of the fermentation tank, and compressed air is pre-stored in the clamping cavity; Step s02: Start stirring. Use the intelligent control system to start the stirrer, which will stir the materials and microbial agents in the fermentation tank to fully mix the feed materials to be fermented and the microbial agents to start fermentation. Step s03: Add gas and stir as needed. The oxygen content in the fermentation tank is continuously monitored by the sensor inside the tank. When the oxygen content detected by the sensor is lower than the preset value, the intelligent control system controls the first solenoid valve to open, so that the compressed air in the jacket cavity is released into the fermentation tank through the air compensation pipe. At the same time, the intelligent control system adjusts the speed of the stirrer to ensure that the oxygen and the material are fully mixed. Meanwhile, gas is added to the jacket cavity in a timely manner through the air inlet pipe to maintain the reserve of compressed air in the jacket cavity. Step s04: Discharge after fermentation. If materials need to be added during the fermentation process, the fourth solenoid valve is opened by the intelligent control system. Materials are added to the fermentation tank through the material compensation pipe and then the fourth solenoid valve is closed. After fermentation is completed, the fermented microbial feed is discharged through the discharge pipe at the bottom of the fermentation tank.

[0012] The advantages of this invention compared to the prior art are: This invention achieves complete isolation between the gas storage chamber and the fermentation chamber by setting up an independently sealed clamping cavity between the outer cover and the fermentation tank, combined with multiple sealing structures. This structurally prevents materials and bacterial liquid from entering the gas path in reverse, avoiding contamination and blockage, making the gas supply more stable and safe, and preventing leakage and reverse contamination of materials.

[0013] By using oxygen sensors, an intelligent control system, and multiple solenoid valves in tandem, the equipment can accurately replenish oxygen as needed during fermentation, and simultaneously adjust the stirring speed to ensure rapid and uniform oxygen diffusion, significantly improving oxygen utilization, accelerating the fermentation rate, and shortening the fermentation cycle.

[0014] The jacket cavity is pre-stored with compressed air, and the pressure difference enables one-way gas replenishment. The aerobic gas can be preheated in the jacket cavity. When aerobic gas is needed, the valve pipe on the fermenter is opened, and the compressed air in the jacket cavity is preheated before the aerobic gas is injected into the fermenter in one direction to promote the fermentation reaction. The heating and gas injection functions are centrally located in the jacket cavity, realizing internal intelligent control. The injection of aerobic gas into the fermenter is achieved through internal intelligent control, and the space occupied is small.

[0015] During fermentation, feeding needs to be added according to the degree of reaction. The sealed material compensation pipe is equipped with a solenoid valve, which allows feeding to be added midway without damaging the seal of the fermenter, avoiding contamination by miscellaneous bacteria and ensuring the continuity and stability of fermentation. A heating structure is set in the jacket cavity to preheat the gas supply, so that the gas temperature matches the suitable growth temperature of microorganisms, further improving the activity of the strain and the fermentation effect. Attached Figure Description

[0016] Figure 1 A three-dimensional schematic diagram of a microbial feed fermentation device provided for an embodiment of the present invention; Figure 2 The microbial feed fermentation equipment provided for the embodiments of the present invention consists of Figure 1A schematic diagram illustrating the second perspective; Figure 3 A schematic diagram of the microbial feed fermentation equipment provided in an embodiment of the present invention after being cut open; Figure 4 The microbial feed fermentation equipment provided for the embodiments of the present invention consists of Figure 3 A schematic diagram illustrating the removal of the motor; Figure 5 The microbial feed fermentation equipment provided for the embodiments of the present invention consists of Figure 4 An enlarged schematic diagram of part A is shown.

[0017] In the diagram: 1. Outer casing; 2. Fermentation tank; 5. Discharge pipe; 6. Jacket cavity; 7. Agitator; 8. Air inlet pipe; 9. Air compensation pipe; 10. First solenoid valve; 11. Sensor; 12. Sealed bearing; 13. Isolation plate; 14. Connecting flange; 15. First static sealing ring; 16. Second solenoid valve; 17. Gas pressure sensor; 18. Third solenoid valve; 19. Agitator shaft; 20. Agitator blades; 21. Second static sealing ring; 22. Material compensation pipe; 23. Fourth solenoid valve; 24. Heating pipe. Detailed Implementation

[0018] The above and other embodiments and advantages of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] In one implementation, such as Figures 1-5As shown: A microbial feed fermentation device includes an outer cover 1 and a fermentation tank 2 disposed inside the outer cover 1. The fermentation tank 2 has a discharge pipe 5 at its bottom. A cavity 6 is formed between the outer cover 1 and the fermentation tank 2, and the cavity 6 and the fermentation tank 2 are independent sealed spaces. A stirrer 7 is installed inside the fermentation tank 2. An air inlet pipe 8 is connected to the outer cover 1, and the inner end of the air inlet pipe 8 is connected to the cavity 6. An air compensation pipe 9 is connected to the fermentation tank 2, with one end connected to the cavity 6 and the other end connected to the fermentation tank 2. A first solenoid valve 10 is installed on the air compensation pipe 9. A sensor 11 for detecting oxygen content is installed inside the fermentation tank 2. An intelligent control system is also provided for controlling the opening and closing of the first solenoid valve 10 and the rotation speed of the stirrer 7. Multiple sealing structures are provided between the outer cover 1 and the fermentation tank 2. Specifically, these include the connection between the top of the fermentation tank 2 and the stirrer 7, the connection between the bottom of the fermentation tank 2 and the wall of the clamping cavity 6, and the connection of the flange 14 at the top of the outer cover 1. This ensures that the clamping cavity 6 and the fermentation tank 2 are not connected to each other and are sealed. The clamping cavity 6 is a sealed cavity pre-stored with compressed air. When the first solenoid valve 10 is opened, the compressed air in the clamping cavity 6 can be released into the fermentation tank 2 through the air compensation pipe 9. The fermentation tank 2 is connected to a material compensation pipe 22, which extends to the outside of the outer cover 1 and is equipped with a fourth solenoid valve 23 that is electrically connected to the intelligent control system.

[0020] When this microbial feed fermentation equipment is in operation, the feed materials and microbial agents to be fermented are first fed into the fermentation tank 2 through the feed pipe 3. After feeding, both the fermentation tank 2 and the jacket 6 are sealed and the sealed spaces are independent of each other. Compressed air is pre-stored in the jacket 6. The jacket 6 and the fermentation tank 2 are sealed independently through multiple sealing structures and are not connected to each other. After the equipment is started, the intelligent control system controls the agitator 7 to start working. The agitator 7 stirs the materials and microbial agents in the fermentation tank 2 to ensure that they are fully mixed, creating the basic conditions for microbial fermentation. During the fermentation process, the sensor 11 continuously detects the oxygen content in the fermentation tank 2 and transmits the detected oxygen content signal to the intelligent control system in real time. At the same time, the air inlet pipe 8 can replenish the gas in the jacket 6 as needed according to the gas conditions in the jacket 6 to maintain the compressed air reserve in the jacket 6.

[0021] When the intelligent control system determines that the oxygen content detected by sensor 11 is lower than the preset value, meaning that the microorganisms in fermenter 2 need additional oxygen for fermentation, the intelligent control system controls the first solenoid valve 10 to open. At this time, the compressed air pre-stored in the clamping cavity 6 is quickly released into fermenter 2 through the air compensation pipe 9, providing sufficient oxygen for the aerobic microorganisms in fermenter 2 and aiding in microbial fermentation. Simultaneously, the intelligent control system can adjust the speed of the stirrer 7 according to the fermentation needs, ensuring that the supplemented compressed air is fully mixed with the materials in fermenter 2, ensuring uniform oxygen distribution, and increasing the speed of the stirrer 7 to accelerate the mixing reaction. During the fermentation process, if materials need to be added to fermenter 2, they can be added through the material compensation pipe 22. The outer end of the material compensation pipe 22 is sealed and connected to the material pipe, which is sealed and connected to an external third-party feeding device. The intelligent control system can control the opening and closing of the fourth solenoid valve 23 to allow external materials to be added to fermenter 2 as needed. After the replenishment is completed, the intelligent control system closes the fourth solenoid valve 23 to ensure the sealed state of fermenter 2 and ensure the stable progress of the fermentation process. The intelligent control system synchronously adjusts the speed of the stirrer 7, improving the mixing efficiency of oxygen and materials, increasing oxygen utilization, and accelerating the fermentation rate. The material compensation pipe 22 and the fourth solenoid valve 23 allow for on-demand material replenishment without damaging the seal, ensuring continuous and stable fermentation.

[0022] This invention addresses several issues. First, by establishing independently sealed cavities 6 between the outer casing 1 and the fermentation tank 2, and pre-storing compressed air within these cavities, and coordinating with the first solenoid valve 10 and the intelligent control system, compressed air can be rapidly replenished into the fermentation tank 2 when oxygen levels are insufficient. This ensures a timely and sufficient supply of oxygen for aerobic microbial fermentation, preventing decreased microbial activity and reduced fermentation efficiency due to oxygen deficiency. Second, the intelligent control system synchronously controls the opening and closing of the first solenoid valve 10 and the rotation speed of the stirrer 7, ensuring that the replenished compressed air mixes thoroughly with the materials in the fermentation tank 2, improving oxygen utilization, further accelerating the microbial fermentation reaction rate, and shortening the fermentation cycle. Third, the multiple sealing structures ensure the independent sealing of both the cavities 6 and the fermentation tank 2, preventing compressed air leakage from the cavities 6 and ensuring the stability of the gas supply. The use of compressed air intake to replenish air into the fermentation tank 2 achieves unidirectional air replenishment, preventing materials or fermentation products from the fermentation tank 2 from flowing back into the cavities 6 and interfering with the gas supply. For example, under the control of the injection pressure of the external air injection device (air compressor), the pressure range of the compressed air pre-stored in the clamping cavity 6 is 0.15-0.25MPa. This pressure range can ensure that the compressed air is quickly released into the fermentation tank 2 without damaging the sealing of the fermentation tank 2 due to excessive pressure. Fourth, the setting of the material compensation pipe 22 and the fourth solenoid valve 23 can realize the replenishment of materials on demand during the fermentation process. Moreover, the opening and closing of the fourth solenoid valve 23 is controlled by the intelligent control system to ensure that the sealing state of the fermentation tank 2 is not damaged when replenishing materials, thus ensuring the continuity and stability of the fermentation process and further improving fermentation efficiency and feed quality.

[0023] A heating structure is installed within the jacket cavity 6 to preheat the gas supply, ensuring the inlet gas temperature matches the optimal growth temperature for microorganisms. Combined with a unidirectional air intake method, the heat (heated to 30℃-35℃) is simultaneously carried into fermenter 2 as aerobic gas enters unidirectionally, further enhancing microbial activity and fermentation efficiency. The heating and gas injection functions are centrally located within the jacket cavity 6, enabling intelligent internal control. The injection of aerobic gas into the fermenter is also intelligently controlled, minimizing space requirements.

[0024] It should be further pointed out that the present invention can determine whether it is necessary to replenish the material in the fermentation tank 2 in two ways: one is to observe the fermentation state and remaining material in the fermentation tank 2 by hand to intuitively determine whether replenishment is needed; the other is to add a material level sensor in the fermentation tank 2. The material level sensor is electrically connected to the intelligent control system and detects the liquid level of the material in the fermentation tank 2 in real time. When the material level is detected to be lower than the preset value, the intelligent control system issues a material replenishment prompt. At this time, the operator can replenish the material through the material compensation pipe 22.

[0025] The present invention also discloses one embodiment of multiple sealing structures, which include a sealing bearing 12 disposed at the connection between the top of the fermenter 2 and the stirrer 7, an isolation plate 13 disposed between the bottom of the fermenter 2 and the wall of the cavity 6, a connecting flange 14 disposed at the top of the outer cover 1, and a first static sealing ring 15 disposed at the top of the connecting flange 14 for mounting the motor. The drive end of the stirrer 7 enters the connecting flange 14 upward and is connected to the output end of the motor. The intelligent control system includes a controller electrically connected to the motor (e.g., a PLC controller, installed on the outer wall of the equipment or in the control room). The sealing bearing 12 ensures both the rotatability of the stirrer 7 and the sealing of the top assembly of the stirrer 7 and the fermenter 2. The partition plate 13 forms a support point at the bottom of the inner cavity of the outer cover 1 to support and fix the bottom of the fermenter 2. A second static sealing ring 21 is connected between the bottom of the fermenter 2 and the top surface of the partition plate 13 to seal the bottom of the fermenter 2 and the clamping cavity 6. The sealing volumes of the two are independent of each other. The first static sealing ring 15 is used as the sealing connection condition to fix the motor base and the connecting flange 14. Although the motor is installed at the top of the outer cover 1 (i.e. the top of the clamping cavity 6), it will also be sealed by the first static sealing ring 15 to ensure the air in the clamping cavity 6 is compressed.

[0026] In another embodiment, a second solenoid valve 16 is installed on the air inlet pipe 8, and the second solenoid valve 16 is electrically connected to the controller. A gas pressure sensor 17 is installed in the clamping cavity 6, and the gas pressure sensor 17 is electrically connected to the controller. In conjunction with the intelligent control system, the gas pressure in the heating clamping cavity 6 can be automatically detected and replenished. This maintains a stable pressure of compressed air in the heating clamping cavity 6 without manual intervention, ensuring that the compressed air released into the fermenter 2 has a stable pressure each time. This guarantees the stability and reliability of the gas supply, further improves the accuracy of aerobic gas replenishment, and helps to steadily improve fermentation efficiency.

[0027] In another embodiment, the discharge pipe 5 passes vertically upward through the partition plate 13 into the fermentation tank 2, and a third solenoid valve 18 is fixed on the discharge pipe 5. When the third solenoid valve 18 is closed, the bottom of the fermentation tank 2 is sealed, thus ensuring that the fermentation tank 2 is sealed. After fermentation is completed, the third solenoid valve 18 is opened, and the fermented material is discharged.

[0028] In another embodiment, the stirrer 7 includes a vertically arranged stirring shaft 19 and multiple layers of stirring blades 20 arranged on the stirring shaft 19. The inclination angles of the stirring blades 20 in different layers are different. One end of the air compensation pipe 9 connected to the fermentation tank 2 is perpendicular to the first layer of stirring blades 20 above the stirrer 7. When air is supplied to the fermentation tank 2 to achieve an aerobic reaction, the compressed air released from the clamping cavity 6 can directly act on the rotating stirring blades 20. With the help of the rotation of the stirring blades 20, oxygen is quickly diffused to various areas in the fermentation tank 2, further improving oxygen utilization and accelerating the microbial fermentation reaction rate. Secondly, by synchronously controlling the opening and closing of the first solenoid valve 10 and the rotation speed of the stirrer 7 through the intelligent control system, combined with the auxiliary fermentation function of the stirrer 7, the mixing effect of compressed air and materials can be further improved, oxygen utilization can be increased, the microbial fermentation reaction rate can be further accelerated, and the fermentation cycle can be shortened.

[0029] In another embodiment, a heating tube 24 is installed inside the clamping cavity 6, and a temperature adjustment device is fixed to the outer wall of the outer casing 1. The heating tube 24 is electrically connected to the temperature adjustment device, and the temperature adjustment device is electrically connected to the controller. The temperature inside the clamping cavity 6 can be precisely controlled by the intelligent control system to maintain the compressed air at a suitable temperature, preventing low-temperature gas from entering the fermenter 2 and affecting the internal temperature environment, further enhancing microbial activity and improving fermentation efficiency. Simultaneously, the temperature adjustment device is linked to the controller, automatically adjusting the heating power of the heating tube 24 according to fermentation needs, eliminating the need for manual adjustment, reducing operational difficulty, and improving the practicality and convenience of the equipment. Specifically, the intelligent control system precisely controls the temperature of the compressed air inside the clamping cavity 6, maintaining it at a suitable temperature of 30-35℃ (this temperature range matches the fermentation temperature inside the fermenter, avoiding impact on microbial activity).

[0030] The present invention also provides a method for fermenting microbial feed, using the microbial feed fermentation equipment described above, comprising the following steps: Step s01: Feeding and sealing: Feed materials and microbial agents to be fermented are fed into fermentation tank 2 through feed pipe 3 at the top of fermentation tank 2, and compressed air is pre-stored in the clamping cavity 6; Step s02: Start stirring. Use the intelligent control system to start the stirrer 7. The stirrer 7 stirs the material and microbial agent in the fermentation tank 2 to fully mix the feed material to be fermented and the microbial agent to start fermentation. Step s03: Add gas and stir as needed. The oxygen content in the fermentation tank 2 is continuously detected by the sensor 11. When the oxygen content detected by the sensor 11 is lower than the preset value, the intelligent control system controls the first solenoid valve 10 to open, so that the compressed air in the clamping cavity 6 is released into the fermentation tank 2 through the air compensation pipe 9. At the same time, the intelligent control system adjusts the speed of the stirrer 7 to ensure that the oxygen and the material are fully mixed. Meanwhile, the gas is added to the clamping cavity 6 in a timely manner through the air inlet pipe 8 to maintain the reserve of compressed air in the clamping cavity 6. Step s04: Fermentation complete and material is discharged. If material needs to be added during the fermentation process, the fourth solenoid valve 23 is opened by the intelligent control system, and material is added to the fermentation tank 2 through the material compensation pipe 22. After the material is added, the fourth solenoid valve 23 is closed. After the fermentation is completed, the fermented microbial feed is discharged through the discharge pipe 5 at the bottom of the fermentation tank 2.

[0031] The above orientation references do not represent the specific orientations of each component in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme and to make relative descriptions based on the orientations of the references. In reality, the specific orientations of each component are based on their actual installation and use, as well as the orientation descriptions that are customary to those skilled in the art. This is hereby stated.

[0032] The specific embodiments described above further illustrate the inventive purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, or improvements made by those skilled in the art within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A microbial feed fermentation device, comprising an outer cover (1), a fermentation tank (2) arranged inside the outer cover (1), and a discharge pipe (5) arranged at the bottom of the fermentation tank (2), characterized in that: A cavity (6) is formed between the outer cover (1) and the fermentation tank (2). The cavity (6) and the fermentation tank (2) are independent sealed spaces, and the cavity (6) has a heating function. A stirrer (7) is provided inside the fermentation tank (2). An air inlet pipe (8) is connected to the outer cover (1). The inner end of the air inlet pipe (8) is connected to the cavity (6). An air compensation pipe (9) is connected to the fermentation tank (2). One end of the air compensation pipe (9) is connected to the cavity (6), and the other end is connected to the fermentation tank (2). A first solenoid valve (10) is provided on the air compensation pipe (9). A sensor (11) for detecting oxygen content is provided inside the fermentation tank (2). A sensor (11) for controlling the opening and closing of the first solenoid valve (10) and the stirrer (7) is also provided. The intelligent control system for rotation speed; multiple sealing structures are provided between the clamping cavity (6) and the fermentation tank (2) to ensure that the clamping cavity (6) and the fermentation tank (2) are not connected to each other and are sealed. The clamping cavity (6) is a sealed cavity pre-stored with compressed air. When the first solenoid valve (10) is opened, the compressed air in the clamping cavity (6) can be released into the fermentation tank (2) through the air compensation pipe (9). Through the independent sealing structure of the clamping cavity (6) and the fermentation tank (2), the compressed air is unidirectionally replenished to the fermentation tank (2). The fermentation tank (2) is connected to a material compensation pipe (22). The material compensation pipe (22) extends to the outside of the outer cover (1) and is equipped with a fourth solenoid valve (23) electrically connected to the intelligent control system.

2. The microorganism feed fermenting apparatus according to claim 1, wherein The multiple sealing structures include a sealing bearing (12) at the connection between the top of the fermenter (2) and the stirrer (7), an isolation plate (13) between the bottom of the fermenter (2) and the cavity wall of the clamp (6), a connecting flange (14) at the top of the outer cover (1), and a first static sealing ring (15) at the top of the connecting flange (14) for mounting the motor. The drive end of the stirrer (7) enters the connecting flange (13) upward and is connected to the output end of the motor. The intelligent control system includes a controller electrically connected to the motor.

3. The microorganism feed fermenting apparatus according to claim 2, characterized by, A second solenoid valve (16) is installed on the air intake pipe (8), and the second solenoid valve (16) is electrically connected to the controller. A gas pressure sensor (17) is installed in the clamping cavity (6), and the gas pressure sensor (17) is electrically connected to the controller.

4. The microorganism feed fermenting apparatus according to claim 3, wherein The discharge pipe (5) passes vertically upward through the partition plate (13) and enters the fermentation tank (2), and a third solenoid valve (18) is fixed on the discharge pipe (5).

5. The microorganism feed fermenting apparatus according to claim 4, wherein The stirrer (7) includes a vertically arranged stirring shaft (19) and multiple layers of stirring blades (20) arranged on the stirring shaft (19). The inclination angles of the stirring blades (20) in different layers are different. One end of the air compensation pipe (9) connected to the fermentation tank (2) is perpendicular to the first layer of stirring blades (20) above the stirrer (7).

6. The microorganism feed fermenting apparatus according to claim 5, wherein A second static sealing ring (21) is connected between the bottom of the fermenter (2) and the top surface of the isolation plate (13).

7. The microorganism feed fermenting apparatus according to claim 6, characterized by A heating tube (24) is installed inside the clamping cavity (6), and a temperature adjustment device is fixed on the outer wall of the outer cover (1). The heating tube (24) is electrically connected to the temperature adjustment device, and the temperature adjustment device is electrically connected to the controller.

8. A method for fermenting microbial feed, using the microbial feed fermentation equipment as described in claim 1, comprising the following steps: Step s01: Feeding and sealing: Feed materials and microbial agents to be fermented are put into the fermentation tank (2) through the feed pipe (3) at the top of the fermentation tank (2), and compressed air is pre-stored in the clamping cavity (6); Step s02: Start stirring. Use the intelligent control system to start the stirrer (7). The stirrer (7) stirs the material and microbial agent in the fermentation tank (2) to make the feed material to be fermented and the microbial agent fully mixed to start fermentation. Step s03: Add gas and stir as needed. The oxygen content in the fermentation tank (2) is continuously detected by the sensor (11) in the fermentation tank (2). When the oxygen content detected by the sensor (11) is lower than the preset value, the intelligent control system controls the first solenoid valve (10) to open, so that the compressed air in the clamping cavity (6) is released into the fermentation tank (2) through the air compensation pipe (9). At the same time, the intelligent control system adjusts the speed of the stirrer (7) to ensure that the oxygen and the material are fully mixed. At the same time, the gas is added to the clamping cavity (6) in a timely manner through the air inlet pipe (8) to maintain the reserve of compressed air in the clamping cavity (6). Step s04: Fermentation complete and discharge. If materials need to be added during the fermentation process, the fourth solenoid valve (23) is opened by the intelligent control system. Materials are added to the fermentation tank (2) through the material compensation pipe (22) and then the fourth solenoid valve (23) is closed. After the fermentation is completed, the fermented microbial feed is discharged through the discharge pipe (5) at the bottom of the fermentation tank (2).

Images