Liquid fermentation feeding device

Abstract

The utility model discloses a kind of liquid fermentation feeding equipment, including main mixing tank and auxiliary fermentation tank, the top of the main mixing tank and the bottom of each the auxiliary fermentation tank are equipped with servo motor, the output end of each servo motor is extended to the inside of main mixing tank and auxiliary fermentation tank respectively and is equipped with stirring vane by stirring rod installation, and the inner wall of the main mixing tank and auxiliary fermentation tank is provided with heat-insulating interlayer, the inside of heat-insulating interlayer is provided with helical groove body, electric heating wire is embedded in the inside of helical groove body, the inside of the main mixing tank and auxiliary fermentation tank is provided with temperature sensor and pH sensor, the inside of the auxiliary fermentation tank is also provided with dissolved oxygen content sensor. The utility model uses the structural design of main mixing tank and multiple auxiliary fermentation tanks, can be simultaneously connected different strain (such as lactic acid bacteria, yeast, bacillus). Through pipeline valve, the synergic fermentation of each strain in auxiliary fermentation tank is accurately controlled, and the nutrition diversification of fermented feed is effectively realized.

Description

Technical Field

[0001] This utility model relates to the field of feeding equipment technology, specifically a liquid fermentation feeding device. Background Technology

[0002] Liquid fermented feed is increasingly widely used in large-scale farming due to its advantages such as easy digestibility and absorption, good palatability, and reduced antibiotic use. Its core principle is to convert feed ingredients (corn, soybean meal, wheat bran, etc.) into a liquid feed rich in probiotics, organic acids, and small-molecule nutrients through microbial fermentation (such as lactic acid bacteria and yeast), which can significantly improve feed intake and immunity in livestock and poultry. However, existing liquid fermentation feeding equipment has the following problems in practical applications: Traditional equipment typically uses single-tank, single-strain fermentation, making it difficult to achieve synergistic effects of multiple strains. Different livestock and poultry (e.g., piglets require high lactic acid bacteria content, broilers require high yeast content) and different growth stages of the same livestock or poultry have significantly different requirements for microbial community structure. Feed fermented with a single strain has a limited nutritional composition, failing to meet precise feeding needs. Furthermore, changing strains requires thorough tank cleaning, which is cumbersome and prone to cross-contamination. Microbial fermentation is sensitive to the environment (e.g., aerobic bacteria require sufficient oxygen, anaerobic bacteria require strict anaerobic conditions). Existing equipment often uses a fixed ventilation mode, unable to flexibly switch between aerobic / anaerobic environments based on the type of bacteria. For example, lactic acid bacteria fermentation requires an anaerobic environment; if the equipment cannot effectively remove oxygen, it easily leads to the proliferation of other bacteria. Yeast fermentation requires oxygen; insufficient ventilation reduces fermentation efficiency, resulting in unstable feed quality. During the transport of raw materials from mixing to the fermentation tank, substrate concentration fluctuations can easily occur due to pipe residues or uneven feeding. Stirring within the tank is often unidirectional, leading to insufficient mixing, localized sedimentation, or fermentation dead zones, affecting raw material conversion rates and increasing the difficulty of subsequent cleaning. Utility Model Content

[0003] The purpose of this invention is to provide a liquid fermentation feeding device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a liquid fermentation feeding device, comprising a main mixing tank and a secondary fermentation tank. The main mixing tank is provided with a base plate by uniformly installed support columns, and secondary fermentation tanks are uniformly arranged at the top edge of the base plate by support frames. Feeding pipes are uniformly arranged at the bottom of the outer side of the main mixing tank. The output end of each feeding pipe is fixedly connected to the input end of each secondary fermentation tank. A pipe valve is provided at the connection between each feeding pipe and the main mixing tank. A fermentation inoculum box is installed at one end of the top of the feeding pipe near the pipe valve, and a feeding motor is installed at the other end of the feeding pipe. The drive end of the feeding motor extends into the interior of the feeding pipe and is connected to a spiral feeding paddle. Servo motors are installed at the top of the main mixing tank and at the bottom of each of the secondary fermentation tanks. The output of each servo motor extends into the interior of the main mixing tank and the secondary fermentation tank, respectively, and is equipped with stirring blades via stirring rods. The inner walls of the main mixing tank and the secondary fermentation tanks are provided with heat insulation jackets, and spiral grooves are provided on the inner side of the heat insulation jackets. Heating wires are embedded inside the spiral grooves. Temperature sensors and pH sensors are installed inside the main mixing tank and the secondary fermentation tanks, and dissolved oxygen sensors are also installed inside the secondary fermentation tanks.

[0005] Preferably, the top of the base plate is provided with a pump body and a nitrogen tank, and the input end of the pump body is connected to the nitrogen tank through a gas extraction pipe, and the output end of the pump body extends to the top of the interior of two of the auxiliary fermentation tanks through a gas injection pipe.

[0006] Preferably, the top of the base plate is also provided with a second pump body and a sterile air box, and the input end of the second pump body is connected to the sterile air box through an air extraction pipe, and the output end of the second pump body extends to the top of the interior of two other auxiliary fermenters through an air injection pipe.

[0007] Preferably, each of the fermentation inoculum boxes is equipped with a feeding solenoid valve at its output end, and different inoculum species are set inside each fermentation inoculum box. A drive motor is installed on the pipe valve on one side of each fermentation inoculum box.

[0008] Preferably, each of the feeding tubes is provided with an insulation sleeve on its outer side, and an inclined support rod is provided between the bottom of each feeding tube and the support column.

[0009] Preferably, a solid feed hopper and a liquid feed pipe are respectively provided on both sides of the top of the main mixing tank, and a controller is provided on one side of the bottom of the main mixing tank.

[0010] Preferably, each of the secondary fermenters is provided with a discharge pipe equipped with a discharge solenoid valve at the bottom of one side.

[0011] Preferably, the inner walls of both the main mixing tank and the secondary fermentation tank are coated with a nano-scale polytetrafluoroethylene coating, and the coating thickness is 0.05-0.1 mm.

[0012] This utility model relates to a liquid fermentation feeding device, which has significant advantages over the prior art, as detailed below: 1. This equipment adopts a structure design of a main mixing tank and multiple auxiliary fermentation tanks, enabling the simultaneous introduction of different bacterial strains (such as lactic acid bacteria, yeast, and Bacillus). The synergistic fermentation of each strain in the auxiliary fermentation tanks is precisely controlled through pipeline valves, effectively achieving nutritional diversification in the fermented feed. Compared to traditional single-strain fermentation methods, this equipment can flexibly switch strain combinations according to the needs of different feeding targets (such as piglets and broilers), significantly improving the nutritional value and applicability of the feed, and solving the problem of nutritional uniformity caused by single-strain fermentation in existing technologies.

[0013] 2. The equipment includes a second pump body and a sterile air chamber, specifically designed for aerobic fermentation, providing sterile air to ensure the optimal growth environment for aerobic bacteria. Simultaneously, a first pump body and a nitrogen chamber address the needs of anaerobic fermentation, providing a nitrogen environment to inhibit the growth of harmful bacteria and promote the fermentation efficiency of anaerobic bacteria. This dual-regulation mechanism allows for flexible adjustment of the fermentation environment according to the needs of different bacterial strains, significantly improving fermentation efficiency and feed quality.

[0014] 3. Both the main mixing tank and the auxiliary fermentation tank are equipped with temperature and pH sensors to monitor the temperature and pH values ​​in real time during fermentation, and these are precisely controlled by a controller. Furthermore, the design of the insulation jacket and heating wires ensures uniform temperature within the tanks, avoiding the fermentation instability caused by temperature fluctuations in traditional fermentation equipment. The precise temperature control and pH monitoring system significantly improves the stability and controllability of the fermentation process.

[0015] 4. The feeding pipe in the equipment is equipped with a feeding motor and a spiral feeding paddle to ensure that the raw materials are evenly fed into the secondary fermentation tank; the stirring blades driven by the servo motor perform efficient stirring in the main mixing tank and the secondary fermentation tank, so that the fermentation materials are fully mixed and the problem of uneven fermentation in certain areas is avoided. The efficient feeding and stirring system significantly improves the fermentation efficiency and shortens the fermentation cycle.

[0016] 5. The equipment adopts a modular design, and each component, such as the fermentation inoculum box, feeding pipe, and secondary fermentation tank, can be flexibly configured and expanded according to actual needs. For example, different inoculum strains can be set in the fermentation inoculum box, and the feeding can be precisely controlled by a feeding solenoid valve to meet the needs of different fermentation processes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the internal structure of the present invention; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the feeding tube of this utility model; Figure 4 This is a schematic diagram of the internal structure of the secondary fermentation tank of this utility model; In the diagram: 1. Base plate; 2. Support column; 3. Pump body one; 4. Stirring blade; 5. pH sensor; 6. Dissolved oxygen sensor; 7. Temperature sensor; 8. Nitrogen tank; 9. Sterile air chamber; 10. Controller; 11. Pipeline valve; 12. Inclined support rod; 13. Pump body two; 14. Servo motor; 15. Discharge pipe; 16. Discharge solenoid valve; 17. Stirring rod; 18. Secondary fermentation tank; 19. Drive motor; 20. Feeding motor; 21. Feeding pipe; 22. Feeding solenoid valve; 23. Spiral groove; 24. Heating wire; 25. Main mixing tank; 26. Insulation jacket; 27. Fermentation inoculum box; 28. Solid feed hopper; 29. ​​Liquid feed pipe; 30. Gas injection pipe; 31. Gas extraction pipe; 32. Support frame; 33. Insulation jacket; 34. Spiral feeder. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] Please see Figure 1-4 An embodiment of this utility model provides a liquid fermentation feeding device, including a main mixing tank 25 and a secondary fermentation tank 18. The main mixing tank 25 is provided with a base plate 1 by uniformly installed support columns 2, and secondary fermentation tanks 18 are uniformly arranged at the top edge of the base plate 1 by support frames 32. Each secondary fermentation tank 18 is provided with a discharge pipe 15 with a discharge solenoid valve 16 at the bottom of one side.

[0021] The top of the base plate 1 is equipped with a pump body 3 and a nitrogen tank 8. The input end of the pump body 3 is connected to the nitrogen tank 8 through a suction pipe 31, and the output end of the pump body 3 extends to the top of the interior of two of the auxiliary fermentation tanks 18 through a gas injection pipe 30.

[0022] The top of the base plate 1 is also equipped with a second pump body 13 and a sterile air box 9. The input end of the second pump body 13 is connected to the sterile air box 9 through an air extraction pipe 31, and the output end of the second pump body 13 extends to the top of the interior of the other two auxiliary fermenters 18 through an air injection pipe 30.

[0023] The liquid fermentation feeding equipment mainly includes a main mixing tank 25 and several auxiliary fermentation tanks 18. The main mixing tank 25 is located at the center of the equipment and is fixed to the base plate 1 by evenly installed support columns 2. The base plate 1 is a flat steel plate with high load-bearing capacity, ensuring the stability of the entire equipment.

[0024] At the top edge of the base plate 1, several auxiliary fermentation tanks 18 are evenly arranged via support frames 32. Each auxiliary fermentation tank 18 has a discharge pipe 15 on one side of its bottom, and a discharge solenoid valve 16 is installed on the discharge pipe 15. The discharge solenoid valve 16 is used to control the outflow of fermentation liquid to ensure the controllability and safety of the fermentation process.

[0025] The top of the base plate 1 is also equipped with a pump body 3 and a nitrogen tank 8. The input end of the pump body 3 is connected to the nitrogen tank 8 via a suction pipe 31 to ensure that nitrogen can smoothly enter the pump body 3. The output end of the pump body 3 extends to the top of the interior of two of the auxiliary fermentation tanks 18 via a gas injection pipe 30. Specifically, the gas injection pipe 30 is led out from the output end of the pump body 3, passes through the top sealing cover of the auxiliary fermentation tank 18, and enters the top of the tank to ensure that the nitrogen can be evenly distributed.

[0026] Similarly, a second pump body 13 and a sterile air chamber 9 are also installed on the top of the base plate 1. The input end of the second pump body 13 is connected to the sterile air chamber 9 via an air extraction pipe 31, ensuring that sterile air can smoothly enter the second pump body 13. The output end of the second pump body 13 extends to the top of the interior of the other two auxiliary fermenters 18 via an air injection pipe 30. The connection method is similar to that of the first pump body 3; the air injection pipe 30 is led out from the output end of the second pump body 13, passes through the top sealing cover of the auxiliary fermenter 18, and enters the top of the tank, ensuring that the sterile air can be evenly distributed.

[0027] Feeding pipes 21 are evenly arranged on the bottom of the outer side of the main mixing tank 25. Each feeding pipe 21 is equipped with an insulation sleeve 33 on its outer side, and an inclined support rod 12 is provided between the bottom of each feeding pipe 21 and the support column 2.

[0028] Multiple feeding pipes 21 are evenly arranged on the outer bottom of the main mixing tank 25. Each feeding pipe 21 is made of high-temperature resistant PVC material. One end of the feeding pipe 21 is connected to the bottom of the main mixing tank 25, and the other end is open for material input. The design of the feeding pipe 21 ensures that the material can smoothly enter the main mixing tank 25, avoiding blockage problems during the material conveying process.

[0029] To prevent the mixing effect from being affected by the temperature drop of the materials during the conveying process, each feed pipe 21 is equipped with an insulation sleeve 33 on the outside. The insulation sleeve 33 is made of polyurethane foam material, which has good thermal insulation performance.

[0030] To enhance the stability of the feeding pipes 21, an inclined support rod 12 is installed between the bottom of each feeding pipe 21 and the supporting column 2. One end of the inclined support rod 12 is fixed to the bottom of the feeding pipe 21 by bolts, and the other end is fixed to the supporting column 2 by welding. The inclined support rod 12 ensures that the feeding pipe 21 remains stable during material conveying, avoiding feeding difficulties caused by vibration.

[0031] The output end of each feeding pipe 21 is fixedly connected to the input end of each auxiliary fermentation tank 18. Each feeding pipe 21 is equipped with a pipe valve 11 at the connection point with the main mixing tank 25. A fermentation inoculum box 27 is installed at the top end of the feeding pipe 21 near the pipe valve 11. Each fermentation inoculum box 27 is equipped with a feeding solenoid valve 22 at its output end. Different inoculum species are set inside each fermentation inoculum box 27. A drive motor 19 is installed on the pipe valve 11 on one side of each fermentation inoculum box 27.

[0032] A feeding motor 20 is installed at the other end of the feeding pipe 21. The drive end of the feeding motor 20 extends into the interior of the feeding pipe 21 and is connected to a spiral feeding paddle 34.

[0033] The output end of each feed pipe 21 is fixedly connected to the input end of each secondary fermentation tank 18. Specifically, the output end of the feed pipe 21 is connected to the input flange of the secondary fermentation tank 18 via a flange, and then secured with bolts to ensure a firm and airtight connection. This is to ensure that materials do not leak during transport and to facilitate installation and maintenance.

[0034] At each connection point between the feed pipe 21 and the main mixing tank 25, a pipeline valve 11 is installed. The pipeline valve 11 is an electrically operated valve, its function being to control the flow rate of material from the main mixing tank 25 to the feed pipe 21. A drive motor 19 is installed on one side of each pipeline valve 11. The drive motor 19 is connected to the valve stem of the pipeline valve 11 via a transmission shaft, and is used to drive the opening and closing of the valve. The drive motor 19 is a stepper motor, capable of precisely controlling the valve's opening angle, thereby achieving precise control of the material flow rate.

[0035] At the top of each feeding pipe 21, near the pipe valve 11, is a fermentation inoculum box 27. Different inoculum strains are stored inside each fermentation inoculum box 27 to meet the needs of different fermentation processes. Each fermentation inoculum box 27 is equipped with a feeding solenoid valve 22 at its output end. The feeding solenoid valve 22 is electromagnetically controlled, allowing it to open and close quickly as needed, ensuring that the inoculum is accurately fed into the feeding pipe 21.

[0036] A feeding motor 20 is installed at the other end of the feeding pipe 21. The drive end of the feeding motor 20 extends into the interior of the feeding pipe 21 and is connected to a spiral feeding paddle 34. The feeding motor 20 is a DC motor with high torque and stable speed, ensuring uniform material conveying within the feeding pipe 21. The spiral feeding paddle 34 is made of stainless steel, possessing excellent wear resistance and corrosion resistance. Its spiral structure design effectively improves material conveying efficiency.

[0037] Servo motors 14 are installed at the top of the main mixing tank 25 and at the bottom of each secondary fermentation tank 18. The output end of each servo motor 14 extends into the interior of the main mixing tank 25 and the secondary fermentation tank 18 respectively, and stirring blades 4 are installed through stirring rods 17. The inner walls of the main mixing tank 25 and the secondary fermentation tank 18 are provided with heat insulation jackets 26. Spiral grooves 23 are provided on the inner side of the heat insulation jackets 26. Heating wires 24 are embedded in the interior of the spiral grooves 23. Temperature sensors 7 and pH sensors 5 are installed inside the main mixing tank 25 and the secondary fermentation tank 18. Dissolved oxygen sensors 6 are also installed inside the secondary fermentation tank 18.

[0038] A servo motor 14 is installed at the top of the main mixing tank 25 and at the bottom of each secondary fermentation tank 18. The servo motor 14 is a high-precision, high-torque model to ensure the stability and uniformity of the mixing process. The stirring rod 17 is made of high-strength material, and the stirring blade 4 is designed with a multi-blade structure to enhance the mixing effect.

[0039] Both the main mixing tank 25 and the secondary fermentation tank 18 have an insulation jacket 26 installed on their inner walls. The insulation jacket 26 is composed of multiple layers of insulation material, such as polyurethane foam or rock wool, to effectively isolate the external ambient temperature from the fermentation process inside the tank.

[0040] The inner side of the insulation jacket 26 is provided with a spiral groove 23, and an electric heating wire 24 is embedded inside the spiral groove 23. The electric heating wire 24 is made of a high-temperature resistant and high-resistance alloy material, and its heating power is adjusted by a power control device to achieve precise control of the temperature inside the tank.

[0041] Both the main mixing tank 25 and the secondary fermentation tank 18 are equipped with a temperature sensor 7 and a pH sensor 5. The temperature sensor 7 is a high-precision thermocouple or thermistor, and the pH sensor 5 is a corrosion-resistant glass electrode. Both are connected to the control panel via signal transmission lines to monitor and display the temperature and pH value inside the tank in real time.

[0042] The secondary fermenter 18 is also equipped with a dissolved oxygen sensor 6. The dissolved oxygen sensor 6 is an electrochemical or optical sensor, which is connected to the control panel via a signal transmission line to monitor and display the dissolved oxygen level in the tank in real time.

[0043] Solid feed hoppers 28 and liquid feed pipes 29 are respectively provided on both sides of the top of the main mixing tank 25, and a controller 10 is provided on one side of the bottom of the main mixing tank 25.

[0044] The inner walls of the main mixing tank 25 and the secondary fermentation tank 18 are coated with a nano-level polytetrafluoroethylene coating with a thickness of 0.05-0.1 mm.

[0045] This coating not only improves the wear resistance of the tank, but also reduces the adhesion of materials to the inner wall of the tank, making it easier to clean and maintain.

[0046] The solid feed hopper 28 is located on the top left side of the main mixing tank 25, has a funnel-shaped structure, and is made of stainless steel. The liquid feed pipe 29 is located on the top right side of the main mixing tank 25, and is made of corrosion-resistant plastic or stainless steel.

[0047] The controller 10 is located on the bottom side of the main mixing tank 25, and is controlled by a microcomputer with a touch screen operating interface.

[0048] The controller 10 can monitor and adjust the feeding speed of the solid feed hopper 28 and the liquid feed pipe 29 in real time, as well as parameters such as temperature and stirring speed in the main mixing tank 25.

[0049] In this embodiment of the application, when in use, it is checked whether there are enough different strains in each fermentation culture tank 27, the fermentation parameters (such as temperature, pH value, and ventilation type) of each auxiliary fermentation tank 18 are preset by the controller 10, and the storage of sterile air tank 9 and nitrogen tank 8 is ensured to be sufficient.

[0050] After starting the equipment, solid raw materials are fed into the main mixing tank 25 from the solid feed hopper 28, and liquid raw materials (such as water and nutrient solution) are injected through the liquid feed pipe 29. The servo motor 14 at the top of the main mixing tank 25 drives the stirring rod 17 and stirring blade 4 to rotate, so as to mix the solid and liquid raw materials evenly. At the same time, the heating wire 24 in the heat insulation jacket 26 is activated, and the temperature sensor 7 is used to adjust the temperature in the main mixing tank 25 to the preset value (such as 30-35℃).

[0051] After mixing, the controller 10 controls the drive motor 19 to open the pipeline valve 11 of the designated feeding pipe 21, the feeding motor 20 starts, and drives the spiral feeding paddle 34 to transport the mixed raw materials along the feeding pipe 21 (the outer insulation sleeve 33 maintains the temperature of the raw materials) to the corresponding secondary fermentation tank 18; during the transportation process, according to the microbial requirements of the secondary fermentation tank 18, the feeding solenoid valve 22 of the corresponding fermentation inoculum box 27 is opened to put the inoculum into the feeding pipe 21 and mix it with the raw materials.

[0052] After the raw materials enter the secondary fermentation tank 18, the servo motor 14 at the bottom drives the stirring blade 4 to continuously stir (50-100 r / min) to ensure that the materials are evenly contacted with the inoculum. If it is aerobic fermentation (such as yeast), the controller 10 starts the pump body 2 13 to introduce sterile air into the secondary fermentation tank 18 through the air injection pipe 30. The dissolved oxygen sensor 6 monitors and maintains the dissolved oxygen at 2-5 mg / L in real time. If it is anaerobic fermentation (such as lactic acid bacteria), the pump body 1 3 is started to introduce nitrogen to drive oxygen and ensure an anaerobic environment in the tank.

[0053] During fermentation, temperature sensor 7 and pH sensor 5 monitor data in real time. Controller 10 adjusts the temperature (e.g., 35-40℃) via heating wire 24 and adjusts the pH value to a suitable range (e.g., 4.0-5.5) via an external acid-base addition device (not shown in the figure). The polytetrafluoroethylene coating on the inner walls of the main mixing tank 25 and the secondary fermentation tank 18 reduces material adhesion and ensures uniform fermentation.

[0054] After fermentation is complete, the controller 10 opens the discharge solenoid valve 16 of the discharge pipe 15 at the bottom of the secondary fermentation tank 18 to output the fermented liquid feed to the feeding terminal.

[0055] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0056] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0057] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0058] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid fermentation feeding device, comprising a main mixing tank (25) and a secondary fermentation tank (18), characterized in that: The main mixing tank (25) is provided with a base plate (1) by uniformly installed support columns (2) below it, and auxiliary fermentation tanks (18) are uniformly provided by support frames (32) at the top edge of the base plate (1). Feeding pipes (21) are uniformly provided at the bottom of the outer side of the main mixing tank (25). The output end of each feeding pipe (21) is fixedly connected to the input end of each auxiliary fermentation tank (18). A pipe valve (11) is provided at the connection between each feeding pipe (21) and the main mixing tank (25). A fermentation inoculum box (27) is installed at the top of the feeding pipe (21) near the pipe valve (11), and a feeding motor (20) is installed at the other end of the feeding pipe (21). The drive end of the feeding motor (20) extends into the inside of the feeding pipe (21) and is connected to a spiral feeding paddle (34). Servo motors (14) are installed at the top of the main mixing tank (25) and at the bottom of each of the secondary fermentation tanks (18). The output end of each servo motor (14) extends into the interior of the main mixing tank (25) and the secondary fermentation tank (18) respectively, and stirring blades (4) are installed through stirring rods (17). The inner walls of the main mixing tank (25) and the secondary fermentation tank (18) are provided with heat insulation jackets (26). Spiral grooves (23) are provided on the inner side of the heat insulation jackets (26). Heating wires (24) are embedded in the interior of the spiral grooves (23). Temperature sensors (7) and pH sensors (5) are provided inside the main mixing tank (25) and the secondary fermentation tank (18). Dissolved oxygen sensors (6) are also provided inside the secondary fermentation tank (18).

2. The liquid fermentation feeding device according to claim 1, characterized in that: The bottom plate (1) is provided with a pump body (3) and a nitrogen tank (8) at the top. The input end of the pump body (3) is connected to the nitrogen tank (8) through a gas extraction pipe (31), and the output end of the pump body (3) extends to the top of the interior of two of the auxiliary fermentation tanks (18) through a gas injection pipe (30).

3. The liquid fermentation feeding device according to claim 1, characterized in that: The top of the base plate (1) is also provided with a second pump body (13) and a sterile air box (9), and the input end of the second pump body (13) is connected to the sterile air box (9) through an air extraction pipe (31), and the output end of the second pump body (13) extends to the top of the interior of two other auxiliary fermenters (18) through an air injection pipe (30).

4. The liquid fermentation feeding device according to claim 1, characterized in that: Each fermentation inoculum box (27) is equipped with a feeding solenoid valve (22) at its output end, and each fermentation inoculum box (27) is equipped with different inoculum species. Each fermentation inoculum box (27) is equipped with a drive motor (19) on the pipe valve (11) on one side of the fermentation inoculum box (27).

5. The liquid fermentation feeding device according to claim 1, characterized in that: Each of the feeding pipes (21) is provided with an insulation sleeve (33) on the outside, and an inclined support rod (12) is provided between the bottom of each feeding pipe (21) and the support column (2).

6. The liquid fermentation feeding device according to claim 1, characterized in that: The main mixing tank (25) is provided with a solid feed hopper (28) and a liquid feed pipe (29) on both sides of the top, and a controller (10) is provided on one side of the bottom of the main mixing tank (25).

7. The liquid fermentation feeding device according to claim 1, characterized in that: Each of the sub-fermenters (18) is provided with a discharge pipe (15) with a discharge solenoid valve (16) at the bottom of one side.

8. The liquid fermentation feeding device according to claim 1, characterized in that: The inner walls of the main mixing tank (25) and the secondary fermentation tank (18) are both coated with a nano-level polytetrafluoroethylene coating with a thickness of 0.05-0.1 mm.

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