Horizontal roller L-alanine fermentation tank and fermentation process

Abstract

The invention relates to the technical field of fermentation, in particular to a horizontal roller L-alanine fermentation tank and a fermentation technology.The horizontal roller L-alanine fermentation tank comprises a horizontally-placed tank body, the tank body is provided with an inlet used for discharging and an outlet used for taking materials, supporting frames are arranged on the two sides of the tank body, and a driving shaft is rotationally installed on each supporting frame in a penetrating mode through a bearing; the end part of the driving shaft is connected with the corresponding side of the tank body; according to the invention, the rotating shaft and the tank body adopt a reverse rotating mode, and after the rotating shaft is started, the stirring connecting rod is driven to efficiently scatter the mixed liquor sediment at the bottom in the tank body through the cooperation of the stirring rod and the rotating shaft, so that the sediment is uniformly dispersed into the mixed liquor again.

Description

Technical Field

[0001] This application relates to the field of fermentation technology, and in particular to a horizontal drum-type L-alanine fermenter and fermentation process. Background Technology

[0002] In the current bio-fermentation industry, horizontal drum fermenters have become one of the key pieces of equipment for producing L-alanine due to their unique structural design. Horizontal drum fermenters possess excellent stirring and mass transfer performance, providing uniform temperature and good oxygen transfer efficiency, which greatly improves the production efficiency and product quality.

[0003] When producing L-alanine using a horizontal drum fermenter, the cultured bacteria and raw materials need to be placed inside the horizontal drum fermenter, the key parameters are adjusted, and finally the mixture inside the horizontal drum fermenter is taken out for separation, purification, and refining to obtain L-alanine.

[0004] For example, patent application CN118792143A discloses a horizontal drum-stirred fermenter and its process, belonging to the field of bio-agriculture. This invention utilizes a falling dispersing mechanism. When the connecting plate rotates to the top, the solid-liquid mixture inside the agitator slides down from one side due to gravity and falls into the water inside the tank. The impact force disperses the condensate, and then the connecting plate and the agitator stir the mixture, ensuring thorough mixing with the fermentation broth, achieving efficient separation and dispersing. However, the existing technology described above still has the following problems: when the agitator plate stirs and disperses the material inside the agitator cover, it relies on the gravity of the threaded sleeve to drive the agitator plate to move up and down along the length of the threaded rod while simultaneously rotating. However, when the threaded rod is horizontal or nearly horizontal, the force on the threaded sleeve along the length of the threaded rod cannot cause the agitator plate to rotate, resulting in poor stirring and dispersing effect.

[0005] In addition, during the rotation of the connecting plate, material residue is easily generated at the gap where it contacts the fermentation tank; at the same time, the material at the bottom of the fermentation tank is also difficult to be stirred and dispersed, both of which will affect the uniformity of the mixing of material and fermentation liquid. Summary of the Invention

[0006] To solve the above-mentioned technical problems, this application provides a horizontal drum-type L-alanine fermenter and fermentation process, adopting the following technical solution: In a first aspect, a horizontal drum-type L-alanine fermenter includes a horizontally placed tank body with an inlet for discharging material and an outlet for retrieving material. Support frames are provided on both sides of the tank body, and a drive shaft is rotatably mounted on the support frames through bearings, with the end of the drive shaft connected to the corresponding side of the tank body.

[0007] The tank is equipped with a rotating shaft inside, and the two ends of the rotating shaft pass through the drive shaft and are rotatably mounted on the side wall of the corresponding side of the tank through bearings. A reversing mechanism is installed between the rotating shaft and the drive shaft.

[0008] The portion of the rotating shaft located inside the tank is equipped with a stirring mechanism for uniformly distributing the material, including: Multiple stirring rods are evenly arranged along the length of the rotating shaft and installed on the rotating shaft. The side of the stirring rods away from the rotating shaft is provided with a common rotating shaft. The rotating shaft is rotatably installed on the stirring rods through bearings, and a stirring connecting rod is provided on the rotating shaft.

[0009] An annular rack plate is located inside the tank on the side away from the outlet and is installed on the inner wall of the tank. A drive gear that meshes with the annular rack plate is mounted on the rotating shaft.

[0010] Preferably, multiple sets of stirring rods are evenly arranged along the length of the rotation axis. Each set of stirring rods has multiple sets evenly arranged around the circumference of the rotation axis and installed on the rotation axis. A rubber belt is provided on the stirring rods along the length of the rotation axis and located on the same plane, and the rubber belt is installed at the end of the stirring rod away from the rotation axis.

[0011] Preferably, a deflecting rod is provided on the stirring rod. The deflecting rod is rotatably mounted on the stirring rod through a bearing and cooperates with the rotating shaft. A deflecting rod is provided on the circumference of the deflecting rod and between each adjacent set of stirring rods. Multiple deflecting rods are evenly arranged along the circumference of the deflecting rod.

[0012] Preferably, an agitation cover for turning over the material at the bottom of the tank is installed between adjacent agitator rods, and a pressure plate for pressing and displacing the rubber belt is installed on the agitation cover between adjacent agitator rods.

[0013] Preferably, the flipping cover is provided with a wire mesh, and the actuating rod is equipped with a driven gear that meshes with the drive gear.

[0014] Preferably, support rods are symmetrically arranged on the rotating shaft along its length, and a scraper is installed on the end of the two support rods away from the rotating shaft. The plane formed by the two support rods and the multiple stirring rods is coplanar.

[0015] Preferably, a grid frame is installed between the two support rods.

[0016] Preferably, the reversing mechanism includes a gear one mounted on a drive shaft near the outlet side, a linkage shaft rotatably mounted on a support frame on the corresponding side via a bearing, a gear two meshing with the gear one mounted on the linkage shaft, and the linkage shaft and the rotating shaft being connected by a belt drive.

[0017] Preferably, the diameter of gear two is smaller than the diameter of gear one.

[0018] Secondly, a horizontal drum fermentation process for L-alanine includes the following steps: S1: Feeding process: Rotate the tank until the inlet faces upward, then pour the material and fermentation liquid into the tank through the inlet to form a mixture.

[0019] S2: Stirring process, rotating the rotating shaft, which synchronously drives the tank to rotate in the opposite direction during the rotation of the rotating shaft, and stirring the mixture through the stirring rod during the rotation of the rotating shaft.

[0020] S3: Dispersion treatment. During the rotation of the rotating shaft, the ring rack plate meshes with the drive gear to drive the rotating shaft to rotate. During the rotation of the rotating shaft, the stirring rod drives the stirring rod to stir the mixed liquid sediment at the bottom of the tank.

[0021] S4: Mixing treatment, which involves remixing the dispersed sediment with the mixed solution.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The rotating shaft and the tank body of the present invention adopt a reverse rotation mode. When the rotating shaft is started, it drives the stirring rod to efficiently disperse the sediment in the mixed liquid at the bottom of the tank through the coordinated cooperation of the stirring rod and the rotating shaft, so as to promote the sediment to be evenly dispersed in the mixed liquid again.

[0023] In addition, the synchronous reverse rotation of the tank will cause the remaining sediment at the bottom that has not been dispersed to move upward with the tank wall. When these sediments rise to a certain height in the tank, they will fall into the mixture due to gravity. Then, they will be deeply mixed again by the continuous stirring of the stirring rod, thereby significantly improving the overall mixing effect, further ensuring the uniformity of the mixture, and ensuring that the fermentation liquid and materials are in full contact and react.

[0024] 2. During the rotation of the rotating shaft designed in this invention, the rotating shaft rotates by meshing with the ring rack plate through the drive gear, thereby ensuring the transmission effect of the rotating shaft rotation and avoiding the failure of the rotating shaft to drive the stirring rod to rotate, which would affect the stirring rod's effect on dispersing the sediment at the bottom of the tank. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of the present invention.

[0026] Figure 2 This is a schematic diagram of the first partial three-dimensional structure inside the tank of the present invention.

[0027] Figure 3 This is a schematic diagram of the second partial three-dimensional structure inside the tank of the present invention.

[0028] Figure 4 This is the present invention. Figure 3Enlarged view of a portion of point A in the middle.

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the flip cover of the present invention.

[0030] Figure 6 This is a schematic diagram of the overall three-dimensional structure inside the tank of the present invention.

[0031] Figure 7 This is a three-dimensional installation structure diagram of the rotating shaft, support rod, and grating plate of the present invention.

[0032] Figure 8 This is a three-dimensional installation structure diagram of the support frame, drive shaft, and rotating shaft of the present invention.

[0033] Figure 9 This is a flow chart of the horizontal drum L-alanine fermentation process.

[0034] Explanation of reference numerals in the attached drawings: 1. Tank body; 11. Inlet; 12. Outlet; 2. Support frame; 3. Drive shaft; 4. Rotating shaft; 41. Support rod; 411. Grille frame; 42. Scraper; 5. Reversing mechanism; 51. Gear one; 52. Linkage shaft; 53. Gear two; 6. Stirring mechanism; 61. Stirring rod; 611. Tilting cover; 612. Pressure plate; 613. Actuating rod; 614. Actuating rod; 615. Wire mesh; 616. Driven gear; 62. Rotating shaft; 63. Stirring connecting rod; 631. Rubber belt; 64. Annular rack plate; 65. Drive gear. Detailed Implementation

[0035] The following is combined with Figures 1 to 9 This application is described in further detail.

[0036] This application discloses a horizontal drum-type L-alanine fermenter and fermentation process, which raises and re-disperses the sediment at the bottom of the tank to ensure the uniformity of the mixing between the fermentation liquid and the materials.

[0037] Example: Reference Figure 1 as well as Figure 2 A horizontal drum-type L-alanine fermenter includes a horizontally placed tank body 1. The tank body 1 has an inlet 11 for discharging material and an outlet 12 for retrieving material. Support frames 2 are provided on both sides of the tank body 1. A drive shaft 3 is rotatably mounted on the support frame 2 through a bearing, and the end of the drive shaft 3 is connected to the corresponding side of the tank body 1.

[0038] Reference Figures 2 to 4 The tank body 1 is equipped with a rotating shaft 4, and the two ends of the rotating shaft 4 pass through the drive shaft 3 and are rotatably mounted on the side wall of the corresponding side of the tank body 1 through bearings. The rotating shaft 4 and the drive shaft 3 are jointly equipped with a reversing mechanism 5.

[0039] The portion of the rotating shaft 4 located inside the tank 1 is equipped with a stirring mechanism 6 for uniformly distributing the material, including: Multiple stirring rods 61 are evenly arranged along the length of the rotating shaft 4 and are installed on the rotating shaft 4. A rotating shaft 62 is arranged on the side of the stirring rods 61 away from the rotating shaft 4. The rotating shaft 62 is rotatably mounted on the stirring rods 61 through a bearing. A stirring connecting rod 63 is arranged on the rotating shaft 62.

[0040] An annular rack plate 64 is disposed inside the tank 1 on the side away from the outlet 12 and installed on the inner wall of the tank 1. A drive gear 65 that meshes with the annular rack plate 64 is installed on the rotating shaft 62.

[0041] In practice, before using the tank 1, the outlet 12 is plugged with a sealing plug (not shown in the figure), and then the fermentation liquid and materials are poured in from the inlet 11, so that the fermentation liquid and materials enter the tank 1. Finally, the inlet 11 is also plugged with a sealing plug (not shown in the figure). At this time, the existing drive motor (not shown in the figure) drives the rotating shaft 4 to rotate through the belt drive. Since the belt drive method is common knowledge, it will not be described in detail here or in subsequent discussions. During the rotation of the rotating shaft 4, the stirring rod 61 is driven to rotate. At this time, the rotating shaft 4 rotates synchronously and in the opposite direction to the tank 1.

[0042] Reference Figure 4 Multiple sets of stirring rods 63 are evenly arranged along the length of the rotating shaft 62. Each set of stirring rods 63 has multiple sets evenly arranged around the circumference of the rotating shaft 62 and is installed on the rotating shaft 62. A rubber belt 631 is provided on the stirring rods 63 along the length of the rotating shaft 62 and located on the same plane. The rubber belt 631 is installed at the end of the stirring rod 63 away from the rotating shaft 62.

[0043] An agitation cover 611 for turning over the material at the bottom of the tank 1 is installed between adjacent agitation rods 61. A pressure plate 612 for pressing and displacing the rubber belt 631 is installed on the agitation cover 611 and between adjacent agitation rods 63.

[0044] In actual operation, the rotating shaft 4 drives the stirring rod 61 to rotate during rotation. The stirring rod 61 can stir the mixture inside the tank 1 during rotation. When the stirring rod 61 drives the tilting cover 611 to move to the bottom of the tank 1, the tilting cover 611 can collect the sediment at the bottom of the tank 1 and drive the sediment to move upward.

[0045] Furthermore, during the rotation of the stirring rod 61, the stirring connecting rod 63 is synchronously driven to rotate around the rotating shaft 4 via the rotating shaft 62. During the rotation of the rotating shaft 62 around the rotating shaft 4, the driving gear 65 moves on the annular rack plate 64. During the movement of the driving gear 65 on the annular rack plate 64, it meshes with the annular rack plate 64, causing the rotating shaft 62 to rotate. During the rotation of the rotating shaft 62, the stirring connecting rod 63 can rotate around the rotating shaft 62. During the rotation of the stirring connecting rod 63, the sediment inside the agitation cover 611 can be stirred and fully dispersed, so that the sediment can be fully dissolved into the mixture.

[0046] When the tilting hood 611 moves the sediment upward to the highest point, the sediment remaining inside the tilting hood 611 falls into the mixed liquid. During the falling process, the sediment can re-enter the mixed liquid due to gravity, and thus the remaining sediment can dissolve in the mixed liquid again.

[0047] When the stirring rod 63 is located at the bottom of the tank 1, the stirring rod 63 rotates around the rotating shaft 62, which drives the rubber belt 631 to agitate the sediment at the bottom of the tank 1. This causes the sediment at the bottom of the tank 1 to be stirred up in the mixture before entering the agitation hood 611. Then, when the agitation hood 611 moves to the current position, it can fully collect the sediment in this area into the agitation hood 611, avoiding the possibility that the sediment may settle at the bottom of the tank 1 and cause the agitation hood 611 to be unable to collect the sediment completely.

[0048] Reference Figure 4 as well as Figure 5 To enhance the dispersing effect of sediments inside the agitation hood 611, the agitator 614 provided by this invention can perform secondary dispersing of sediments agitated by the stirring rod 63. Specifically, a deflector 613 is provided on the stirring rod 61. The deflector 613 is rotatably mounted on the stirring rod 61 through a bearing and cooperates with the rotating shaft 62. A deflector 614 is provided on the circumference of the deflector 613 and between each adjacent set of stirring rods 63. Multiple deflectors 614 are evenly arranged along the circumference of the deflector 613.

[0049] The flip cover 611 is provided with a wire mesh 615, and the actuating rod 613 is equipped with a driven gear 616 that meshes with the drive gear 65.

[0050] During the rotation of the rotating shaft 62, not only does it drive the stirring rod 63 to disperse the sediment, but it also evenly disperses the originally deposited material in the mixture around the stirring rod 63, creating a precise synergistic transmission system. That is, as the rotating shaft 62 continues to rotate, the power is synchronously transmitted to the actuating rod 613 through the precise meshing of the driving gear 65 and the driven gear 616, causing it to start rotating at a uniform speed. As the actuating rod 613 rotates, the actuating rod 614, which is linked to it, also moves synchronously. The rotation of the actuating rod 614 applies a reverse external force with constantly changing direction to the mixture near the stirring rod 63.

[0051] Therefore, under the influence of irregular external forces, the sediments and mixed liquid inside the turbulence hood 611 are forced to generate complex eddy motions, resulting in continuous high-frequency collisions between them. These collisions not only disrupt the original cohesive state of the sediments but also further refine larger sediment particles through the combined effects of physical impact and fluid shearing. At the same time, driven by irregular agitation, the mixed liquid forms a multi-dimensional turbulent field, accelerating the contact between the sediments and the mixed liquid, allowing the sediments to disperse and dissolve more quickly and uniformly.

[0052] During the circumferential rotation of the rubber belt 631 around the rotating shaft 62, the pressure plate 612 can play a dual role of blocking and giving way to the part of the rubber belt 631 closest to the actuating rod 613. This design can effectively prevent the rubber belt 631 from directly colliding with the actuating rod 614 during circumferential rotation, thereby preventing the actuating rod 614 from being unable to pass the rubber belt 631 smoothly due to mutual obstruction, and ensuring the smooth operation of the overall transmission structure.

[0053] Furthermore, from an equipment optimization perspective, the agitator 611 can be replaced with a wire mesh 615. That is, during the original agitation of sediments by the agitator 611, the use of wire mesh 615 significantly reduces the contact area with the mixture and sediments due to its unique mesh structure. When the wire mesh 615 moves with the tank or related components, the liquid resistance and frictional resistance from the sediments are significantly reduced, not only lowering the load on the entire transmission system but also helping to reduce energy loss, making the equipment operate more efficiently and stably.

[0054] Meanwhile, during the agitation process, the wire mesh 615's grid structure can play multiple roles in dividing, guiding, and agitating the mixture. When the mixture passes through the grid of the wire mesh 615, it will be dispersed into multiple fine liquid streams. These liquid streams collide and merge with each other, thereby achieving a uniform agitation of the mixture and further improving its homogeneity, resulting in a better mixing effect between the sediment and the mixture.

[0055] Reference Figure 6 as well as Figure 7Support rods 41 are symmetrically arranged on the rotating shaft 4 along its length. A scraper 42 is installed on the end of the two support rods 41 away from the rotating shaft 4. The plane formed by the two support rods 41 and the multiple stirring rods 61 is coplanar.

[0056] A grid frame 411 is installed between the two support rods 41.

[0057] The scraper 42 maintains a close contact with the inner wall of the tank 1, ensuring comprehensive treatment of the material adhering to the tank 1. In operation, when the tilting cover 611 rotates to the highest point of the tank 1 via the transmission mechanism, the remaining sediment on its inner side will naturally fall into the mixture below under gravity. At this time, some sediment may tend to re-aggregate towards the bottom of the tank 1 due to its own gravity or differences in fluidity. The rotating shaft 4 designed in this invention, during continuous rotation, drives the scraper 42 to move circumferentially around the rotating shaft 4 through the rigidly connected support rod 41. When the scraper 42 rotates to the bottom area of ​​the tank 1, it can accurately reach the sediment layer and, through continuous prying force, disperse the accumulated sediment again, allowing it to be evenly dispersed back into the mixture system.

[0058] During the dynamic process of sediment reintegrating into the mixture, the grid frame 411 rotates circumferentially in sync with the rotating shaft 4. Its grid structure can generate multi-directional cutting force on the mixture containing sediment, further enhancing the agitation effect and preventing the secondary occurrence of local sedimentation. Therefore, this invention constructs a highly efficient mixing system based on the basic stirring of the stirring rod 61, with a main and auxiliary synergistic effect: the main driving force is formed by the scraping action of the scraper 42, the flipping and guiding action of the flipping cover 611, and the deep stirring action of the stirring rod 63; the auxiliary stirring action of the grid frame 411 and the irregular turbulent flow field formed by the toggle rod 614 serve as supplements, improving the mixing uniformity by disrupting the fluid movement trajectory. This multi-level synergistic approach can achieve all-round uniform distribution of materials and fermentation broth, fundamentally ensuring full contact and efficient conversion between the two during the reaction process.

[0059] Example 2: Refer to Figure 8 Based on Embodiment 1, in order to increase the synergistic effect between the tank body 1 and the rotating shaft 4, so that the tank body 1 and the rotating shaft 4 start and stop synchronously, and reduce the use of existing drives, the reversing mechanism 5 provided by the present invention can solve the above problems. Specifically, the reversing mechanism 5 includes a gear 51 installed on the drive shaft 3 near the outlet 12, and a linkage shaft 52 rotatably installed on the support frame 2 on the corresponding side through a bearing. A gear 53 meshing with the gear 51 is installed on the linkage shaft 52, and the linkage shaft 52 and the rotating shaft 4 are connected by a belt drive.

[0060] In operation, the rotating shaft 4 begins to rotate, and the power it generates is transmitted to the linkage shaft 52 via belt drive, causing the linkage shaft 52 to rotate as well. Simultaneously, the linkage shaft 52 rotates, and the meshing of gears 51 and 53 transmits power to the drive shaft 3, causing it to also begin to rotate. Because gears 51 and 53 engage in meshing transmission, this transmission characteristic directly results in the linkage shaft 52 rotating in the opposite direction to the tank 1. Furthermore, since the linkage shaft 52 and the rotating shaft 4 are connected via belt drive, the tank 1 also rotates in the opposite direction to the rotating shaft 4. As tank 1 rotates, the sediment remaining at its bottom—specifically, the sediment in the gap between the bottom of tank 1 and the tilting hood 611—is carried upwards by the rotation of tank 1. As tank 1 continues to rotate, this sediment is transported to its highest point and then falls under the influence of gravity. During this descent, the sediment is reintegrated into the mixture, ensuring a good and uniform mixing of the sediment and the mixture. Furthermore, the diameter of gear 2 53 is smaller than that of gear 1 51. This dimensional difference creates a specific transmission ratio during transmission, resulting in different rotational speeds between the linkage shaft 52 and the drive shaft 3. This speed difference is further transmitted, ultimately ensuring differential rotation between the rotating shaft 4 and the tank 1. Under this differential rotation state, the rotation of the rotating shaft 4 drives the stirring rod 61 to agitate the mixture at a different speed than that of the tank 1. Because the stirring rod 61 rotates in the opposite direction and at a different speed than the tank 1, a more complex flow field can be formed in the mixture, allowing the mixture to undergo more thorough and comprehensive agitation, thereby effectively ensuring the uniformity of the stirring rod 61's agitation of the mixture and further improving the overall mixing effect.

[0061] Finally, refer to Figure 9 The present invention also provides a horizontal drum fermentation process for L-alanine, comprising the following steps: S1: Feeding process: Rotate tank 1 until inlet 11 faces upward, and then pour the material and fermentation liquid into tank 1 through inlet 11 to form a mixture.

[0062] S2: Stirring process, rotating shaft 4, rotating shaft 4 drives tank 1 to rotate in the opposite direction synchronously during rotation, and stirring rod 61 stirs the mixture during rotation of rotating shaft 4.

[0063] S3: Dispersion treatment. During the rotation of the rotating shaft 4, the stirring rod 61 is driven to rotate. During the rotation of the stirring rod 61, the mixture inside the tank 1 can be stirred. When the stirring rod 61 drives the tilting cover 611 to move to the bottom of the tank 1, the tilting cover 611 can collect the sediment at the bottom of the tank 1 and drive the sediment to move upward.

[0064] During the rotation of the stirring rod 61, the stirring connecting rod 63 is synchronously driven to rotate around the rotating shaft 4 via the rotating shaft 62. During the rotation of the rotating shaft 62 around the rotating shaft 4, the driving gear 65 moves on the annular rack plate 64. During the movement of the driving gear 65 on the annular rack plate 64, it meshes with the annular rack plate 64, causing the rotating shaft 62 to rotate. During the rotation of the rotating shaft 62, the stirring connecting rod 63 can rotate around the rotating shaft 62. During the rotation of the stirring connecting rod 63, the sediment inside the agitation cover 611 can be stirred and the sediment can be fully dispersed.

[0065] S4: Mixing treatment. When the turning cover 611 moves the sediment upward to the highest point, the sediment remaining inside the turning cover 611 falls into the mixing liquid. During the falling process, the sediment can re-enter the mixing liquid due to gravity, and the remaining sediment can dissolve in the mixing liquid again.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A horizontal drum-type L-alanine fermenter, comprising a horizontally placed tank body (1), the tank body (1) having an inlet (11) for discharging material and an outlet (12) for discharging material, support frames (2) provided on both sides of the tank body (1), a drive shaft (3) rotatably mounted on the support frame (2) through bearings, and the end of the drive shaft (3) being connected to the corresponding side of the tank body (1), characterized in that: A rotating shaft (4) is provided inside the tank (1), and the two ends of the rotating shaft (4) pass through the drive shaft (3) and are rotatably mounted on the side wall of the corresponding side of the tank (1) through bearings. A reversing mechanism (5) is installed between the rotating shaft (4) and the drive shaft (3). The portion of the rotating shaft (4) located inside the tank body (1) is equipped with a stirring mechanism (6) for uniformly distributing the material, including: Multiple stirring rods (61) are evenly arranged along the length of the rotating shaft (4) and installed on the rotating shaft (4). A rotating shaft (62) is provided on the side of the stirring rods (61) away from the rotating shaft (4). The rotating shaft (62) is rotatably installed on the stirring rods (61) through a bearing. A stirring connecting rod (63) is provided on the rotating shaft (62). An annular rack plate (64) is located inside the tank (1) on the side away from the outlet (12) and installed on the inner wall of the tank (1). A drive gear (65) that meshes with the annular rack plate (64) is installed on the rotating shaft (62).

2. The horizontal drum-type L-alanine fermenter according to claim 1, characterized in that: Multiple sets of stirring rods (63) are evenly arranged along the length of the rotating shaft (62). Each set of stirring rods (63) has multiple sets evenly arranged along the circumference of the rotating shaft (62) and installed on the rotating shaft (62). A rubber belt (631) is provided on the stirring rods (63) along the length of the rotating shaft (62) and located on the same plane. The rubber belt (631) is installed at the end of the stirring rod (63) away from the rotating shaft (62).

3. A horizontal drum-type L-alanine fermenter according to claim 2, characterized in that: A common actuating rod (613) is provided on the stirring rod (61). The actuating rod (613) is rotatably mounted on the stirring rod (61) through a bearing and cooperates with the rotating shaft (62). Actuating rod (614) is provided on the circumference of the actuating rod (613) and between each adjacent stirring rod (63). Multiple actuating rods (614) are evenly arranged along the circumference of the actuating rod (613).

4. A horizontal drum-type L-alanine fermenter according to claim 3, characterized in that: An agitation cover (611) for turning over the material at the bottom of the tank (1) is installed between adjacent agitation rods (61). A pressure plate (612) for pressing and displacing the rubber belt (631) is installed on the agitation cover (611) and between adjacent agitation rods (63).

5. A horizontal drum-type L-alanine fermenter according to claim 4, characterized in that: A wire mesh (615) is provided on the flip cover (611), and a driven gear (616) that meshes with the drive gear (65) is installed on the actuating rod (613).

6. A horizontal drum-type L-alanine fermenter according to claim 1, characterized in that: Support rods (41) are symmetrically arranged along the length of the rotating shaft (4). A scraper (42) is installed on the end of the two support rods (41) away from the rotating shaft (4). The plane formed by the two support rods (41) and the multiple stirring rods (61) is coplanar.

7. A horizontal drum-type L-alanine fermenter according to claim 6, characterized in that: A grid frame (411) is installed between the two support rods (41).

8. A horizontal drum-type L-alanine fermenter according to claim 1, characterized in that: The reversing mechanism (5) includes a gear 1 (51) mounted on a drive shaft (3) near the outlet (12), a linkage shaft (52) rotatably mounted on a support frame (2) on the corresponding side via a bearing, a gear 2 (53) meshing with the gear 1 (51) mounted on the linkage shaft (52), and the linkage shaft (52) and the rotating shaft (4) are connected by a belt drive.

9. A horizontal drum-type L-alanine fermenter according to claim 8, characterized in that: The diameter of gear 2 (53) is smaller than the diameter of gear 1 (51).

10. A horizontal drum L-alanine fermentation process, comprising a horizontal drum L-alanine fermenter as described in any one of claims 1-9, characterized in that, Its usage includes the following steps: S1: Feeding process: Rotate the tank (1) to the position where the inlet (11) faces upward, and then pour the material and fermentation liquid into the tank (1) through the inlet (11) to form a mixture; S2: Stirring process, rotating the rotating shaft (4), the rotating shaft (4) drives the tank (1) to rotate in the opposite direction during the rotation process, and the mixing liquid is stirred by the stirring rod (61) during the rotation process of the rotating shaft (4); S3: Dispersion treatment, during the rotation of the rotating shaft (4), the rotating shaft (62) is driven to rotate by the meshing of the annular rack plate (64) and the drive gear (65). During the rotation of the rotating shaft (62), the stirring rod (63) is driven to stir the mixed liquid sediment at the bottom of the tank (1). S4: Mixing treatment, which involves remixing the dispersed sediment with the mixed solution.

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