An anaerobic reactor
By designing a drive motor in the anaerobic reactor to drive the synchronous rotation of the rotating base and the transmission shaft, the rotation and revolution of the stirring components are realized, which solves the problem of uneven mixing in the existing device and improves the fermentation efficiency and effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-31
AI Technical Summary
The existing anaerobic reactor's stirring components can only effectively stir materials near the movement trajectory, failing to fully mix materials located between the upper and lower layers, resulting in low fermentation efficiency.
The drive motor drives the rotating seat to revolve around the central axis of the gear ring. The transmission gear at the top of the transmission shaft meshes with the teeth of the gear ring, so that the mixing components rotate and revolve synchronously, expanding the mixing range. Different radial depths of material mixing are achieved through mixing rods of various lengths.
This process ensures full contact between the fermentation substrate and the microbial community, resulting in more uniform mixing and improved efficiency and effectiveness of anaerobic fermentation.
Smart Images
Figure CN224578259U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of anaerobic reaction devices, and specifically relates to an anaerobic reaction device. Background Technology
[0002] In anaerobic reactors, a stirring device is typically installed to agitate the fermentation substrate, ensuring sufficient and effective contact between microorganisms and the substrate, thereby improving fermentation efficiency and ensuring thorough fermentation. Existing patent CN221797257U discloses an anaerobic digestion reactor, including an anaerobic digestion tank. The tank is equipped with a cleaning and stirring assembly, inside which is a rotating rod. This rotating rod is movably connected to the top of the tank via a sealed bearing. A stirring motor is connected to the top of the rotating rod, and stirring blades are connected to its periphery. In operation, the stirring motor drives the rotating rod to rotate, which in turn drives the stirring blades to agitate the material.
[0003] Undeniably, the anaerobic digestion reactor disclosed in this patent can indeed achieve the above-mentioned effects, but it still has some shortcomings: the stirring blades in its cleaning and stirring components can only stir the materials near their movement trajectory, while the stirring effect on the materials located between the movement trajectories of the upper and lower stirring blades is limited. Based on this, it is necessary to optimize and improve the existing stirring components.
[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content
[0005] The purpose of this invention is to provide an anaerobic reaction device to solve the problems existing in the prior art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: An anaerobic reactor, comprising: Reaction vessel; The tank cover is fixed to the top of the reaction vessel by bolts; The stirring assembly disposed on the can lid includes a drive motor fixed to the top of the can lid with its output shaft vertically downward through the can lid, a gear ring fixed to the bottom of the can lid, a rotating seat fixed to the bottom end of the output shaft of the drive motor and rotatably engaged with the gear ring, a transmission shaft passing through the eccentric position of the rotating seat and rotatably engaged with it, a transmission gear fixed to the top of the transmission shaft and meshing with the gear ring, and a stirring element fixed to the bottom of the transmission shaft.
[0007] Furthermore, a discharge pipe communicating with the interior of the reaction vessel is fixed at the bottom of the reaction vessel, and a switch valve is installed on the discharge pipe; an exhaust pipe communicating with the reaction vessel is fixed at the eccentric position of the tank cover, and the outer end of the exhaust pipe extends into the liquid in the external container.
[0008] Furthermore, the top outer wall of the toothed ring is integrally formed with a fixing flange, which is fixed to the bottom of the can lid by bolts; the inner wall of the toothed ring is evenly and densely covered with teeth.
[0009] Furthermore, the rotating seat is sleeved on the outside of the toothed ring, and a plurality of vertically upward rotating cylinders are evenly spaced on the bottom plate of the rotating seat. The rotating cylinders are located on the outside of the toothed ring and are in contact with the outer wall of the toothed ring.
[0010] Furthermore, at least three limiting grooves are evenly spaced on the outer wall of the bottom end of the drive motor output shaft; a receiving groove is provided on the bottom plate of the rotating seat, and a limiting block corresponding to the limiting groove is fixed on the inner wall of the receiving groove.
[0011] Furthermore, a limiting plate is fixed at the bottom of the receiving groove; a fixed shaft with a diameter smaller than that of the drive motor output shaft is fixed at the bottom of the drive motor output shaft, and a fastening nut is threadedly connected to the fixed shaft after it passes through the limiting plate.
[0012] Furthermore, the drive shaft includes a first drive shaft fixedly connected to the drive gear and a second drive shaft integrally formed at the bottom of the first drive shaft and having a diameter smaller than that of the first drive shaft; a mounting cylinder is fixed at the eccentric position of the rotating seat, and a flange bearing is fixed inside the mounting cylinder; the second drive shaft and the flange bearing are interference-fitted.
[0013] Furthermore, the stirring component includes a connecting plate fixed to the outer wall of the bottom end of the second drive shaft and extending radially outward along the second rotation axis, a stirring shaft fixed to the bottom of the outer end of the connecting plate and pointing vertically downward, and a plurality of stirring rods fixed at intervals on the stirring shaft.
[0014] Furthermore, the stirring rod includes a first stirring rod extending radially along the stirring shaft, a second stirring rod located directly below the first stirring rod and having a length greater than that of the first stirring rod, and a third stirring rod fixedly connected to the outer ends of the first and second stirring rods.
[0015] Furthermore, the can lid is provided with a discharge port at the eccentric position, which is sealed by a sealing cap.
[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The drive motor of this utility model drives the rotating seat to revolve around the central axis of the gear ring, and at the same time, the transmission gear at the top of the transmission shaft meshes with the teeth of the gear ring, so that the transmission shaft and the stirring component rotate synchronously. This synchronous revolution and rotation can extend the coverage of the stirring component from the center of the tank to the edge, thereby increasing the mixing area; in addition, the stirring rod can act on materials at different radial depths, and can also stir the materials in the area between the first stirring rod and the second stirring rod, so that the fermentation substrate and the microbial community can fully contact each other, and the mixing is more uniform, which is conducive to the smooth progress of anaerobic fermentation.
[0017] (2) The rotating seat of this utility model is sleeved on the outside of the toothed ring, and the rotating cylinder on its base plate is in contact with the outer wall of the toothed ring, which can reduce frictional resistance when assisting rotation; in addition, the output shaft of the drive motor and the rotating seat are connected by a limiting groove and a limiting block, and then locked by a fixed shaft and a fastening nut, which makes it easy to realize the rotation of the rotating seat driven by the drive motor. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Main view; Figure 3 This is a schematic diagram of the stirring assembly structure of this utility model; Figure 4 for Figure 3 Main view; Figure 5 for Figure 3 Top view; Figure 6 This is a schematic diagram of the drive motor and stirring component of this utility model; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 This is a schematic diagram of the rotating seat structure of this utility model; Figure 9 for Figure 8 Main view.
[0019] Explanation of key figure labels: 1. Reaction tank body; 11. Discharge pipe; 12. Switch valve; 2. Tank cover; 21. Exhaust pipe; 22. Sealing cover; 3. Stirring assembly; 31. Drive motor; 311. Limiting groove; 312. Fixed shaft; 32. Gear ring; 321. Fixed flange; 322. Tooth; 33. Rotating seat; 331. Rotating cylinder; 332. Receiving groove; 333. Limiting block; 334. Limiting plate; 335. Mounting cylinder; 34. Drive shaft; 341. First drive shaft; 342. Second drive shaft; 35. Drive gear; 36. Stirring component; 361. Connecting plate; 362. Stirring shaft; 363. Stirring rod; 364. First stirring rod; 365. Second stirring rod; 366. Second stirring rod; 37. Fastening nut; 38. Flange bearing. Detailed Implementation
[0020] The technical solution of this utility model patent will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example
[0021] See appendix Figure 1-9 An anaerobic reactor, comprising: The reaction vessel 1 has a discharge pipe 11 fixed at the bottom of the reaction vessel 1, which communicates with the interior of the vessel. A switch valve 12 is installed on the discharge pipe 11. The tank cover 2 is fixed to the top of the reaction tank 1 by bolts. An exhaust pipe 21 connected to the reaction tank 1 is fixed at the eccentric position of the tank cover 2. The outer end of the exhaust pipe 21 extends into the liquid in the external container to form a water seal to prevent air backflow and facilitate the discharge of gas generated by the anaerobic reaction in the reaction tank 1. A discharge port (not shown in the attached figure) is provided at the eccentric position of the tank cover 2 and sealed by a sealing cover 22. The stirring assembly 3, mounted on the tank lid 2, includes a drive motor 31 fixed to the top of the tank lid 2 with its output shaft vertically downward through the tank lid 2 and rotatably engaged with it; a gear ring 32 fixed to the bottom of the tank lid 2; a rotating seat 33 fixed to the bottom end of the output shaft of the drive motor 31 and rotatably engaged with the gear ring 32; a transmission shaft 34 passing through an eccentric position of the rotating seat 33 and rotatably engaged with it; a transmission gear 35 fixed to the top of the transmission shaft 34 and meshing with the gear ring 32; and a stirring element 36 fixed to the bottom of the transmission shaft 34. More specifically, the outer wall of the top of the gear ring 32 has an integrally formed fixing flange 321, which is fixed to the bottom of the tank lid 2 by bolts. The inner wall of the gear ring 32 is evenly and densely covered with teeth 322, and the transmission gear 35 meshes with the teeth 322. Furthermore, the rotating seat 33 is installed as follows: the rotating seat 33 is sleeved on the outside of the gear ring 32, and multiple vertically upward rotating cylinders 331 are evenly spaced on the bottom plate of the rotating seat 33. The cylinder 331 is located outside the gear ring 32 and fits against the outer wall of the gear ring 32. It should be noted that multiple vertically upward-pointing round rods are fixed to the base plate of the rotating seat 33. The rotating cylinder 331 is sleeved on the round rods and rotates with them. A limit cap (not shown in the attached diagram) is fixed to the top of the round rod. A gap is left between the bottom of the limit cap and the top of the rotating cylinder 331, which allows for the installation of the rotating cylinder 331 while ensuring the rotational engagement between the rotating cylinder 331 and the round rod. Secondly, the drive motor 3... At least three limiting grooves 311 are evenly spaced on the outer wall of the bottom end of the output shaft. A receiving groove 332 is provided on the bottom plate of the rotating seat 33. A limiting block 333 corresponding to the limiting groove 311 is fixed on the inner wall of the receiving groove 332. A limiting plate 334 is fixed at the bottom of the receiving groove 332. A fixed shaft 312 with a diameter smaller than the output shaft diameter of the drive motor 31 is fixed at the bottom of the output shaft. The fixed shaft 312 passes through the limiting plate 334 and is threadedly connected to a fastening nut 37. When installing the rotating seat 33, the fixed shaft 312 passes through the limiting plate 334, the lower end of the drive motor 31's output shaft is received in the receiving groove 333, and the limiting block 333 is engaged in the limiting groove 311. Then, the fastening nut 37 is tightened, and the fastening nut 37 tightly abuts against the bottom of the limiting plate 334, thus achieving the installation of the rotating seat 33. To prevent the fastening nut 37 from loosening, two fastening nuts 37 can be used.
[0022] In this embodiment, the drive shaft 34 includes a first drive shaft 341 fixedly connected to the drive gear 35 and a second drive shaft 342 integrally formed at the bottom of the first drive shaft 341 and having a diameter smaller than that of the first drive shaft 341; a mounting cylinder 335 is fixed at an eccentric position on the rotating seat 33, and a flange bearing 38 is fixed inside the mounting cylinder 335; the second drive shaft 342 and the flange bearing 38 are interference-fitted. It should be noted that the flange of the flange bearing 38 is fixed to the bottom of the mounting cylinder 335 by bolts.
[0023] In this embodiment, the stirring component 36 includes a connecting plate 361 fixed to the outer wall of the bottom end of the second drive shaft 342 and extending radially outward along the second rotation shaft 342, a stirring shaft 362 fixed to the bottom of the outer end of the connecting plate 361 and extending vertically downward, and a plurality of stirring rods 363 fixed at intervals on the stirring shaft 362; more specifically, the stirring rods 363 include a first stirring rod 364 extending radially along the stirring shaft 362, a second stirring rod 365 located directly below the first stirring rod 364 and having a length greater than the length of the first stirring rod 364, and a third stirring rod 366 fixedly connected to the outer ends of the first stirring rod 364 and the second stirring rod 365.
[0024] It should be noted that the central axes of the drive motor 31 output shaft, the gear ring 32, and the rotating seat 33 are coincident.
[0025] Open the sealing cap 22 of the feeding port at the eccentric position of the tank lid 2, and add the fermentation substrate and corresponding anaerobic microbial community into the reaction tank 1 through the feeding port. After the feeding is completed, close the sealing cap 22 tightly to ensure that a closed anaerobic space is formed inside the reaction tank 1.
[0026] When the drive motor 31 is started, its output shaft rotates, causing the rotating seat 33 to revolve around the center of the gear ring 32 through the cooperation of the limiting block 33 and the limiting groove 311. During this process, the rotating cylinder 331 rotates along the outer wall of the gear ring 21 to reduce friction. When the rotating seat 33 revolves, the transmission shaft 34 at its eccentric position revolves synchronously with the rotating seat 33. At the same time, the transmission gear 35 at the top of the transmission shaft 34 meshes with the fixed gear ring 32, and rotates due to the influence of the teeth 322 during operation, driving the second transmission shaft 342 and the stirring component 36 at the bottom to rotate. Therefore, the connecting plate 361 moves with the transmission shaft 34, and drives the stirring shaft 362 to revolve and rotate synchronously. The first stirring rod 364, the second stirring rod 365 and the third stirring rod 366 of the stirring shaft 362 stir materials at different radial depths through rods of different lengths. At the same time, the third stirring rod 366 can also stir the materials located between the first stirring rod 364 and the second stirring rod 365, so that the fermentation substrate and anaerobic microbial community can be fully stirred and contacted, improving the mixing effect of the fermentation substrate and making the fermentation more thorough.
[0027] The gas produced by the reaction is discharged through the exhaust pipe 21. Since the outer end of the exhaust pipe 21 extends into the liquid in the external container to form a water seal, it can effectively prevent external air from entering the reaction tank 1. After the reaction is completed, the power supply to the drive motor 31 is turned off, and the stirring assembly 3 stops moving. The switch valve 12 on the discharge pipe 11 is opened, and the reacted material is discharged through the discharge pipe 11. After the discharge is completed, the switch valve 12 is closed.
[0028] Finally, it should be noted that the stirring rod 362 will not come into contact with the inner wall of the reaction vessel 1 during rotation.
[0029] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.
Claims
1. An anaerobic reaction apparatus characterized by comprising: include: Reaction vessel; The tank cover is fixed to the top of the reaction vessel by bolts; The stirring assembly disposed on the can lid includes a drive motor fixed to the top of the can lid with its output shaft vertically downward through the can lid, a gear ring fixed to the bottom of the can lid, a rotating seat fixed to the bottom end of the output shaft of the drive motor and rotatably engaged with the gear ring, a transmission shaft passing through the eccentric position of the rotating seat and rotatably engaged with it, a transmission gear fixed to the top of the transmission shaft and meshing with the gear ring, and a stirring element fixed to the bottom of the transmission shaft.
2. The anaerobic reaction apparatus according to claim 1, wherein The bottom of the reaction vessel is fixed with a discharge pipe that communicates with its interior, and a switch valve is installed on the discharge pipe; An exhaust pipe connected to the reaction vessel is fixed at the eccentric position of the lid, and the outer end of the exhaust pipe extends into the liquid in the outer container.
3. The anaerobic reaction apparatus according to claim 1, wherein The toothed ring has an integrally formed fixed flange on its top outer wall, which is fixed to the bottom of the can cover by bolts; the toothed ring has teeth evenly and densely distributed on its inner wall.
4. The anaerobic reaction apparatus according to claim 1, wherein The rotating seat is sleeved on the outside of the toothed ring. A plurality of vertically upward rotating cylinders are evenly spaced on the bottom plate of the rotating seat. The rotating cylinders are located on the outside of the toothed ring and are in contact with the outer wall of the toothed ring.
5. The anaerobic reaction apparatus according to claim 1, wherein At least three limiting grooves are evenly spaced on the outer wall of the bottom end of the drive motor output shaft; a receiving groove is provided on the bottom plate of the rotating seat, and a limiting block corresponding to the limiting groove is fixed on the inner wall of the receiving groove.
6. The anaerobic reaction apparatus according to claim 5, wherein A limiting plate is fixed at the bottom of the receiving groove; a fixed shaft with a diameter smaller than that of the drive motor output shaft is fixed at the bottom of the drive motor output shaft, and a fastening nut is threadedly connected to the fixed shaft after passing through the limiting plate.
7. The anaerobic reaction apparatus according to claim 1, wherein The drive shaft includes a first drive shaft fixedly connected to the drive gear and a second drive shaft integrally formed at the bottom of the first drive shaft and having a diameter smaller than the diameter of the first drive shaft. A mounting cylinder is fixed at the eccentric position of the rotating seat, and a flange bearing is fixed inside the mounting cylinder; the second drive shaft and the flange bearing are interference-fitted.
8. The apparatus of claim 7, wherein the at least one of the plurality of anaerobic reaction chambers is configured to receive a sample of a biological material. The stirring component includes a connecting plate fixed to the outer wall of the bottom end of the second drive shaft and extending radially outward along the second rotation axis, a stirring shaft fixed to the bottom of the outer end of the connecting plate and pointing vertically downward, and a plurality of stirring rods fixed at intervals on the stirring shaft.
9. The anaerobic reaction apparatus according to claim 6, wherein The stirring rod includes a first stirring rod extending radially along the stirring shaft, a second stirring rod located directly below the first stirring rod and having a length greater than that of the first stirring rod, and a third stirring rod fixedly connected to the outer ends of the first and second stirring rods.
10. The anaerobic reaction apparatus according to claim 1, wherein The can lid has a discharge port at an off-center position, which is sealed by a sealing cap.