Pig feed production raw material fermentation device

Abstract

The application provides a pig feed production raw material fermentation device, and belongs to the technical field of pig feed production equipment, which comprises a fermentation tank, a stirring mechanism and a pneumatic self-excited pulse knocking mechanism. The pneumatic self-excited pulse knocking mechanism comprises a flexible gas collecting film box, a mounting frame, a pull rod, a toothed plate and a knocking assembly. The knocking assembly comprises a rotating disc, a gravity hammer, a sector gear and an arc-shaped anvil. The flexible gas collecting film box is communicated with the fermentation cavity through an air inlet check valve. The pull rod is driven to reciprocate by the gas pressure generated in the fermentation. The gravity hammer is periodically knocked against the arc-shaped anvil through the toothed plate and the sector gear transmission. The application solves the problems that the materials in the tank wall are easy to be caked in the existing fermentation device, the traditional unblocking mode depends on external power supply and has safety hazards, and the unblocking strength cannot be self-adaptively adjusted according to the fermentation conditions. The application realizes passive, self-adaptive and efficient unblocking.

Description

Technical Field

[0001] This invention relates to the field of pig feed production equipment technology, and in particular to a fermentation device for pig feed raw materials. Background Technology

[0002] Fermentation equipment for pig feed is a key piece of equipment in the feed processing industry. It is mainly used for the microbial fermentation of feed ingredients such as soybean meal, corn, and wheat bran to degrade anti-nutritional factors, improve protein digestibility, enhance palatability, and extend shelf life. Existing pig feed fermentation equipment typically includes a sealed tank equipped with a feed inlet, discharge outlet, viewing window, pressure gauge, high-temperature steam inlet, and steam outlet. The tank contains a mixing device to ensure uniform fermentation by mixing the materials during the process. This type of equipment sterilizes and heats the materials with high-temperature steam, followed by microbial fermentation at a suitable temperature, and is widely used in large-scale feed production enterprises.

[0003] However, existing pig feed fermentation devices still have the following shortcomings in actual use: First, fermentation raw materials tend to adhere to the inner wall of the tank during the stirring process, especially at the lower conical section of the tank and the interface between the material and liquid surfaces. Over time, these materials accumulate and form stubborn lumps, which not only affect the uniformity of fermentation but also easily lead to localized material spoilage. Traditional stirring equipment has limited effectiveness in removing the adhering substances from the walls. Second, to prevent lumps, some devices use a vibrating motor. However, vibrating motors require an external power supply, posing electrical safety hazards. They are also unsuitable for fermentation environments containing trace amounts of flammable gases. Furthermore, this type of externally driven unblocking method consumes a lot of energy and cannot automatically adjust the unblocking intensity according to the actual working conditions of the fermentation process (such as gas production rate and changes in material viscosity), resulting in poor unblocking effect or energy waste. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0006] Therefore, how to achieve adaptive unclogging of fermentation tanks without the need for external energy or the introduction of electrical equipment is a technical problem that urgently needs to be solved in this field.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a fermentation device for pig feed production raw materials, comprising: A fermentation tank, wherein a fermentation chamber is provided inside the fermentation tank, and a sealing cover is movably installed at the top of the fermentation chamber; The stirring mechanism includes a servo motor fixedly mounted at the center of the top of the sealing cover. The output end of the servo motor is connected to a rotating shaft via a coupling. The bottom end of the rotating shaft passes through the sealing cover and extends into the fermentation chamber, and is fixedly connected to a stirring impeller; and... The pneumatic self-excited pulse tapping mechanism includes a flexible gas collection film box fixedly installed on the top left side of the sealing cover and a mounting frame installed on the left outer wall of the fermenter. The left end of the flexible gas collection film box is connected to a pull rod. The mounting frame includes a limiting plate fixedly installed on the upper part of the outer wall of the fermenter and two support plates symmetrically arranged front and rear fixedly installed on the lower part of the outer wall of the fermenter. Tapping components are provided on the outer sides of the two support plates, and the bottom of the pull rod is connected to the tapping components through a toothed plate.

[0008] In a preferred embodiment of the fermentation device for pig feed production raw materials according to the present invention, the flexible gas collection membrane box includes a lower cover plate fixedly installed on the top wall of the sealing cover, a corrugated pipe body fixedly connected to the top of the lower cover plate, an upper cover plate fixedly connected to the top of the corrugated pipe body, and the right end of the pull rod fixedly connected to the left side wall of the upper cover plate.

[0009] As a preferred embodiment of the fermentation device for pig feed production raw materials according to the present invention, wherein: the top end of the upper cover plate is connected to an exhaust one-way valve, the bottom end of the lower cover plate is connected to an intake one-way valve, and the opening of the intake one-way valve is located on the upper side inside the fermentation chamber; both the intake one-way valve and the exhaust one-way valve are connected to the interior of the corrugated pipe body.

[0010] In a preferred embodiment of the fermentation device for pig feed production raw materials according to the present invention, a return spring is fixedly connected to the outer side of the corrugated pipe body and located between the lower cover plate and the upper cover plate.

[0011] In a preferred embodiment of the fermentation device for pig feed production raw materials according to the present invention, the bottom end of the pull rod passes through the limiting plate and is fixedly connected to the top wall of the toothed plate. A ball bearing is provided at the connection between the pull rod and the inner wall of the limiting plate. A limiting slide rail is provided at the right end of the bottom of the pull rod, and the left end of the ball bearing is rotatably connected in the limiting slide rail.

[0012] In a preferred embodiment of the fermentation device for pig feed production raw materials according to the present invention, the striking component includes a turntable disposed between the two support plates. The turntable is rotatably connected to the two support plates via a rotating rod. A gravity hammer is fixedly connected to the lower right side of the turntable via an inclined connecting plate. A sector gear adapted to the toothed plate is fixedly installed on the lower left side of the turntable, and the toothed plate is meshed with the sector gear.

[0013] In a preferred embodiment of the pig feed production raw material fermentation device of the present invention, an arc-shaped anvil is fixedly installed on the outer wall of the fermentation tank and directly below the mounting frame, and the striking end of the gravity hammer abuts against the outer wall of the arc-shaped anvil.

[0014] In a preferred embodiment of the fermentation device for pig feed production raw materials described in this invention, a support base is fixedly installed at the bottom of the fermentation tank, and a discharge pipe and a steam inlet pipe are connected to the bottom of the fermentation chamber.

[0015] In a preferred embodiment of the pig feed production raw material fermentation device of the present invention, the top of the sealing cover is equipped with a feed inlet and a steam outlet pipe, and the input end of the steam outlet pipe is connected to the fermentation chamber.

[0016] In a preferred embodiment of the fermentation device for pig feed production raw materials described in this invention, a pressure gauge is further provided at the output end of the steam outlet pipe, and a viewing window is further provided on the front surface of the fermentation tank.

[0017] The beneficial effects of this invention are: 1. This invention cleverly utilizes the gas pressure generated during fermentation (or pressure fluctuations when steam is introduced) as the sole power source by setting up a flexible gas-collecting membrane box and connecting its one-way valve to the inside of the fermentation chamber. As the fermentation gas production rate automatically changes, the expansion and contraction frequency of the membrane box changes accordingly, which in turn controls the striking frequency of the gravity hammer through a transmission mechanism. This achieves adaptive positive feedback regulation: "the more vigorous the fermentation and the easier it is to form clumps, the more frequent the striking." The entire striking mechanism requires no external power supply, gas source, or any sensors, fundamentally eliminating the safety hazards of electrical equipment in a fermentation environment containing trace amounts of flammable gas, thus achieving inherent safety.

[0018] 2. This invention incorporates a return spring on the outer side of the bellows body and torsion springs at both ends of the rotating rod, forming a dual energy storage mechanism. When the diaphragm expands, the return spring is stretched and the torsion springs are twisted, both storing energy simultaneously. When the exhaust check valve opens, the combined force of the return spring and the torsion spring releases energy, driving the gravity hammer to fall rapidly, generating a strong and stable pulse-like impact force. Compared to structures relying solely on gravity or a single spring, this invention provides greater impact kinetic energy, effectively removing stubborn agglomerates.

[0019] 3. The pneumatic self-excited pulse tapping mechanism of this invention is integrally installed on the sealing cover and left outer wall of the fermenter, spatially independent of the stirring mechanism inside the tank, and does not interfere with each other. This structure can be added or modified without significant alterations to the main structure of the existing fermenter, demonstrating good versatility and promotional value. Simultaneously, the state of the material inside the tank can be directly observed through the viewing window, and the pressure gauge can monitor the fermentation pressure in real time. The coordinated operation of all functional components ensures the stable progress of the fermentation process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a perspective view of the overall structure of the present invention; Figure 2 This is a three-dimensional orthographic sectional view of the present invention; Figure 3 This is a perspective front sectional view of the connection between the toothed plate and the striking component of the present invention; Figure 4 This is a perspective front sectional view of the connection between the flexible gas collection membrane box and the sealing cap of the present invention; Figure 5 This is a three-dimensional enlarged view of the connection between the toothed plate and the striking component of the present invention. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0024] Example Reference Figures 1-5This invention provides a fermentation device for pig feed production raw materials, including a fermentation tank 100. The fermentation tank 100 has an internal fermentation chamber 101 for containing the material to be fermented. A sealing cover 102 is movably installed at the top of the fermentation chamber 101 to achieve sealing and opening of the fermentation chamber 101. A support base 103 is fixedly installed at the bottom of the fermentation tank 100 to provide stable support for the entire device. A discharge pipe 104 and a steam inlet pipe 105 are connected to the bottom of the fermentation chamber 101. The discharge pipe 104 is used to discharge the material after fermentation, while the steam inlet pipe 105 is used to introduce high-temperature steam into the fermentation chamber 101 to achieve sterilization and heating treatment of the material. The top of the sealing cover 102 is equipped with a feed inlet 106 and a steam outlet pipe 107. The feed inlet 106 is used to feed the raw materials to be fermented into the fermentation chamber 101. The input end of the steam outlet pipe 107 is connected to the fermentation chamber 101 and is used to discharge steam condensate and excess gas. The output end of the steam outlet pipe 107 is also equipped with a pressure gauge 108 for real-time monitoring of pressure changes in the fermentation chamber 101. The front surface of the fermentation tank 100 is also equipped with a viewing window 109 so that the operator can observe the material status and stirring situation inside the fermentation chamber 101.

[0025] The fermentation apparatus is also equipped with a stirring mechanism 200 for uniformly mixing the materials. The stirring mechanism 200 includes a servo motor 201 fixedly mounted at the center of the top of the sealing cover 102. The output end of the servo motor 201 is connected to a rotating shaft 202 via a coupling. The bottom end of the rotating shaft 202 passes through the sealing cover 102 and extends into the fermentation chamber 101, and is fixedly connected to a stirring impeller 203. When the servo motor 201 starts, it drives the rotating shaft 202 to rotate via the coupling. The rotating shaft 202 drives the stirring impeller 203 to rotate within the fermentation chamber 101, thereby continuously stirring the materials to ensure sufficient contact between the materials and the fermentation bacteria, improving fermentation uniformity.

[0026] To address the issue of materials easily adhering to the inner wall of the fermentation tank and forming clumps during fermentation, the fermentation device is also equipped with a pneumatically self-excited pulse striking mechanism 300. This mechanism includes a flexible gas-collecting membrane box 301 fixedly installed on the top left side of the sealing cover 102 and a mounting frame 302 installed on the left outer wall of the fermentation tank 100. The left end of the flexible gas-collecting membrane box 301 is drivenly connected to a pull rod 303, which is used to transmit the telescopic movement of the membrane box to the transmission component below. The mounting frame 302 includes a limiting plate 302a fixedly installed on the upper part of the outer wall of the fermentation tank 100, and two support plates 302b symmetrically arranged front and rear on the lower part of the outer wall of the fermentation tank 100. A striking component 304 is arranged between the two support plates 302b. The bottom of the pull rod 303 is drivenly connected to the striking component 304 through a toothed plate 305, thereby realizing the transmission of power from the membrane box to the striking component.

[0027] The flexible gas collection membrane box 301 specifically includes a lower cover plate 301a fixedly installed on the top wall of the sealing cover 102. A corrugated pipe body 301b is fixedly connected to the top of the lower cover plate 301a, and an upper cover plate 301c is fixedly connected to the top of the corrugated pipe body 301b. The right end of the pull rod 303 is fixedly connected to the left side wall of the upper cover plate 301c. An exhaust one-way valve 301d is connected to the top of the upper cover plate 301c, and an intake one-way valve 301e is connected to the bottom of the lower cover plate 301a. The opening of the intake one-way valve 301e is located inside the upper side of the fermentation chamber 101. Both the intake one-way valve 301e and the exhaust one-way valve 301d are connected to the interior of the corrugated pipe body 301b. When the pressure inside the fermentation chamber 101 increases due to fermentation gas production or the introduction of steam, the gas enters the bellows body 301b through the inlet check valve 301e, pushing the upper cover plate 301c upward, thereby driving the pull rod 303 upward. When the internal pressure of the bellows body 301b reaches the set opening value of the exhaust check valve 301d, the gas is discharged through the exhaust check valve 301d, at which point the internal and external pressures of the bellows body 301b are restored to equilibrium. A return spring 301f is fixedly connected to the outside of the bellows body 301b, located between the lower cover plate 301a and the upper cover plate 301c. When the exhaust check valve 301d opens, the return spring 301f quickly pulls the upper cover plate 301c back to its original position, causing the pull rod 303 to fall rapidly, completing one extension and retraction cycle.

[0028] To ensure the smoothness and precision of the movement of the pull rod 303, the bottom end of the pull rod 303 passes through the limiting plate 302a and is fixedly connected to the top wall of the toothed plate 305. The limiting plate 302a serves to guide and limit the movement of the pull rod 303. A ball bearing 306 is provided at the connection between the pull rod 303 and the inner wall of the limiting plate 302a. A limiting slide rail 303a is provided at the right end of the bottom of the pull rod 303, and the left end of the ball bearing 306 is rolled within the limiting slide rail 303a. Through the rolling cooperation of the ball bearing 306 within the limiting slide rail 303a, the frictional resistance between the pull rod 303 and the limiting plate 302a is effectively reduced, ensuring smoother up-and-down movement of the pull rod 303.

[0029] The striking assembly 304 includes a turntable 304a disposed between two support plates 302b. The turntable 304a is rotatably connected to the two support plates 302b via a rotating rod 304b, allowing the turntable 304a to swing freely around the rotating rod 304b. A gravity hammer 304d is fixedly connected to the lower right side of the turntable 304a via an inclined connecting plate 304c. A sector gear 304e adapted to a toothed plate 305 is fixedly installed on the lower left side of the turntable 304a, and the toothed plate 305 and the sector gear 304e are meshed together. When the pull rod 303 moves upward, the toothed plate 305 moves upward, causing the sector gear 304e to rotate clockwise, which causes the turntable 304a to swing clockwise around the rotating rod 304b, and the gravity hammer 304d to rise upward. When the pull rod 303 falls rapidly under the action of the return spring 301f, the toothed plate 305 moves downward, causing the sector gear 304e to rotate counterclockwise, the turntable 304a to swing back counterclockwise, and the gravity hammer 304d to fall rapidly downward. An arc-shaped anvil 307 is fixedly installed on the outer wall of the fermenter 100 and directly below the mounting frame 302. The striking end of the gravity hammer 304d abuts against the outer wall of the arc-shaped anvil 307. When the gravity hammer 304d falls back, its striking end strikes the arc-shaped anvil 307. The resulting impact force is concentrated and transmitted to the inner wall of the fermenter 100 through the arc-shaped anvil 307, causing the material clumps attached to the tank wall to loosen and fall off due to the instantaneous impact, thus achieving adaptive unblocking.

[0030] To ensure that the gravity hammer 304d can quickly return to its original position and maintain close contact with the arc-shaped anvil 307 after each strike, preparing for the next strike, the front and rear ends of the rotating rod 304b pass through two support plates 302b respectively and extend to their outer sides where baffles 304f are fixedly connected. Torsion springs 304g are fixedly connected to the opposite surfaces of the two baffles 304f, and the opposite surfaces of the two torsion springs 304g are fixedly connected to the outer walls of the two support plates 302b respectively. When the turntable 304a swings clockwise, the rotating rod 304b rotates accordingly, causing the baffles 304f to twist the torsion springs 304g, storing force. When the toothed plate 305 moves down and releases, the torsion springs 304g release their elasticity, assisting the turntable 304a to swing counterclockwise, ensuring that the striking end of the gravity hammer 304d always maintains effective contact with the arc-shaped anvil 307, thereby guaranteeing the force and stability of each strike.

[0031] Through the aforementioned structure, this fermentation device utilizes the gas pressure generated during fermentation as the sole power source to drive the extension and retraction of the flexible gas collection membrane box 301. This movement is then transmitted mechanically via the tie rod 303, toothed plate 305, sector gear 304e, and turntable 304a, ultimately transforming into a pulse-like impact of the gravity hammer 304d on the arc-shaped anvil 307. This achieves adaptive cleaning of agglomerates on the tank wall. The entire impact mechanism requires no external power or gas source, and the impact frequency automatically adjusts with the fermentation gas production rate, exhibiting inherent safety, energy efficiency, and a compact structure.

[0032] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0033] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0034] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fermentation device for pig feed production raw materials, characterized in that: include, A fermenter (100) has a fermentation chamber (101) inside, and a sealing cover (102) is movably installed on the top of the fermentation chamber (101). The stirring mechanism (200) includes a servo motor (201) fixedly installed at the center of the top of the sealing cover (102). The output end of the servo motor (201) is connected to a rotating shaft (202) via a coupling. The bottom end of the rotating shaft (202) passes through the sealing cover (102) and extends into the fermentation chamber (101), and is fixedly connected to a stirring impeller (203); and, The pneumatic self-excited pulse tapping mechanism (300) includes a flexible gas collection film box (301) fixedly installed on the top left side of the sealing cover (102) and a mounting frame (302) installed on the left outer wall of the fermenter (100). The left end of the flexible gas collection film box (301) is connected to a pull rod (303). The mounting frame (302) includes a limiting plate (302a) fixedly installed on the upper part of the outer wall of the fermenter (100) and two support plates (302b) fixedly installed on the lower part of the outer wall of the fermenter (100). A tapping component (304) is provided on the outer side of the two support plates (302b), and the bottom of the pull rod (303) is connected to the tapping component (304) through a toothed plate (305).

2. The fermentation device for pig feed production raw materials as described in claim 1, characterized in that: The flexible gas collection membrane box (301) includes a lower cover plate (301a) fixedly installed on the top wall of the sealing cover (102), a corrugated pipe body (301b) fixedly connected to the top of the lower cover plate (301a), an upper cover plate (301c) fixedly connected to the top of the corrugated pipe body (301b), and the right end of the pull rod (303) fixedly connected to the left side wall of the upper cover plate (301c).

3. The fermentation device for pig feed production raw materials as described in claim 2, characterized in that: The top of the upper cover plate (301c) is connected to an exhaust one-way valve (301d), and the bottom of the lower cover plate (301a) is connected to an intake one-way valve (301e). The opening of the intake one-way valve (301e) is located on the upper side inside the fermentation chamber (101). Both the intake one-way valve (301e) and the exhaust one-way valve (301d) are connected to the interior of the bellows body (301b).

4. The fermentation device for pig feed production raw materials as described in claim 3, characterized in that: A return spring (301f) is fixedly connected to the outside of the bellows body (301b) and between the lower cover plate (301a) and the upper cover plate (301c).

5. The fermentation device for pig feed production raw materials as described in claim 4, characterized in that: The bottom end of the pull rod (303) passes through the limiting plate (302a) and is fixedly connected to the top wall of the toothed plate (305). A ball bearing (306) is provided at the connection between the pull rod (303) and the inner wall of the limiting plate (302a). A limiting slide rail (303a) is provided at the right end of the bottom of the pull rod (303), and the left end of the ball bearing (306) is rotatably connected in the limiting slide rail (303a).

6. The fermentation device for pig feed production raw materials as described in claim 5, characterized in that: The striking assembly (304) includes a turntable (304a) disposed between the two support plates (302b). The turntable (304a) is rotatably connected to the two support plates (302b) via a rotating rod (304b). A gravity hammer (304d) is fixedly connected to the lower right of the turntable (304a) via an inclined connecting plate (304c). A sector gear (304e) adapted to the toothed plate (305) is fixedly installed on the lower left of the turntable (304a), and the toothed plate (305) meshes with the sector gear (304e).

7. The fermentation device for pig feed production raw materials as described in claim 6, characterized in that: An arc-shaped anvil (307) is fixedly installed on the outer wall of the fermenter (100) and directly below the mounting bracket (302), and the striking end of the gravity hammer (304d) abuts against the outer wall of the arc-shaped anvil (307).

8. The fermentation apparatus for pig feed production raw materials as described in claim 7, characterized in that: The bottom of the fermenter (100) is fixedly installed with a support base (103), and the bottom of the fermentation chamber (101) is connected to a discharge pipe (104) and a steam inlet pipe (105).

9. The fermentation apparatus for pig feed production raw materials as described in claim 8, characterized in that: The top of the sealing cap (102) is equipped with a feed inlet (106) and a steam outlet pipe (107), and the input end of the steam outlet pipe (107) is connected to the fermentation chamber (101).

10. The fermentation apparatus for pig feed production raw materials as described in claim 9, characterized in that: The output end of the steam outlet pipe (107) is also equipped with a pressure gauge (108), and the front surface of the fermenter (100) is also equipped with a viewing window (109).

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