Fermentation tank for anaerobic fermentation

Abstract

The utility model relates to the technical field of fermentation tanks, in particular to a fermentation tank for anaerobic fermentation, which comprises a tank body, a feed port is arranged at the top of the tank body, a discharge port is arranged at the bottom of the tank body, a water inlet is arranged on the surface of the tank body, a stirring mechanism is arranged on the surface of the tank body, and the stirring mechanism comprises a stirring shaft. And the stirring shaft is rotationally connected to the surface of the tank body. Pure water is injected into the stirring shaft and the stirring rod through the opening in the top of the stirring shaft, the power connection box enables the electric heating rod to emit heat under power supply, the electric heating rod heats the pure water in the stirring shaft, heat of the pure water in the stirring shaft is led to the pure water in the stirring rod, and the stirring rod is heated. The stirring shaft and the stirring rod not only stir materials in the tank body in the rotating process, but also heat the materials in the moving process, so that the heat conduction efficiency is improved, the heating is more uniform, and the actual fermentation quality of the fermentation tank is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of fermentation tank technology, specifically to a fermentation tank for anaerobic fermentation. Background Technology

[0002] Anaerobic digesters are key equipment used to generate biogas (mainly composed of methane and carbon dioxide) by microbial decomposition of organic matter (such as agricultural waste and kitchen waste) in an anaerobic environment. Their core function is to maintain suitable temperature, stirring conditions and a sealed environment to optimize microbial activity and improve gas production efficiency.

[0003] Existing anaerobic fermenters heat the inside of the fermenter from the outside, transferring heat to the internal material through the tank wall. This method has low heat transfer efficiency and uneven heating of the material, which greatly reduces the fermentation quality. Utility Model Content

[0004] The purpose of this invention is to provide a fermenter for anaerobic fermentation, in order to solve the problems mentioned in the background art, where existing anaerobic fermenters heat the inside of the fermenter from the outside of the tank body and transfer heat to the internal material through the tank wall. This results in low heat conduction efficiency and uneven heating of the material, which greatly reduces the fermentation quality of the fermenter.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fermenter for anaerobic fermentation, comprising a tank body, a feed inlet at the top of the tank body, a discharge outlet at the bottom of the tank body, a water inlet on the surface of the tank body, a stirring mechanism on the surface of the tank body, the stirring mechanism including a stirring shaft rotatably connected to the surface of the tank body, a stirring rod fixedly connected to the surface of the stirring shaft, a first gear fixedly connected to the top of the stirring shaft, a motor fixedly connected to the top of the tank body, a second gear fixedly connected to the output shaft of the motor, and a heating mechanism on the top of the tank body, the heating mechanism including a base fixedly connected to the tank body. At the top of the tank, a lifting frame is slidably connected to the surface of the base. A cylinder is fixedly connected to the surface of the tank body. The piston rod of the cylinder is fixedly connected to the bottom of the lifting frame. An electrical box is fixedly installed on the surface of the lifting frame. An electric heating rod is fixedly installed at the output end of the electrical box. A top cover is fixedly installed on the top of the electric heating rod. A sealed bearing is fixedly connected to the top of the stirring shaft. A connecting ring is fixedly connected to the rotating end of the sealed bearing. A sealing gasket is fixedly connected to the surface of the connecting ring. A limit post is fixedly connected to the bottom of the top cover. A limit rod is fixedly connected to one side of the connecting ring. A positioning rod is fixedly connected to the bottom of the lifting frame. The positioning rod is slidably connected to the surface of the limit rod.

[0006] Preferably, the stirring shaft and the stirring rod are hollow, and the interiors of the stirring shaft and the stirring rod are interconnected. An opening is provided at the top of the stirring shaft, through which pure water is injected into the interior of the stirring shaft and the interior of the stirring rod.

[0007] Preferably, the first gear and the second gear mesh with each other, the motor drives the second gear to rotate through the output shaft, and the second gear drives the discharge port to rotate on the tank through the first gear.

[0008] Preferably, the cylinder drives the lifting frame to slide and rise on the surface of the base via the piston rod, and the lifting frame drives the electrical box, top cover and electric heating rod to rise and fall synchronously.

[0009] Preferably, a circular hole is provided on the surface of the limiting rod, and the lifting frame drives the positioning rod to slide and rise on the circular hole of the limiting rod. The positioning rod is restricted by the limiting rod to rotate on the tank body along with the stirring shaft.

[0010] Preferably, the connecting ring has limit holes on both sides, and the top cover inserts the limit pin into the limit hole of the connecting ring by lifting and lowering, and the top cover presses the sealing gasket on the connecting ring to form a seal.

[0011] Preferably, the electrical box heats the pure water inside the stirring shaft using an electric heating rod, and the top cover is sealed at the top of the stirring shaft using a sealing bearing, a connecting ring, and a sealing gasket, and the stirring shaft can rotate at the bottom of the top cover.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This fermenter features a hollow interior for the stirring shaft and stirring rod. Pure water is injected into the stirring shaft and stirring rod through an opening at the top. Under power supply, the electrical box heats the electric heating rod, which in turn heats the pure water inside the stirring shaft. The heat from the pure water inside the stirring shaft is transferred to the pure water inside the stirring rod. The stirring shaft and stirring rod simultaneously heat the material inside the fermenter. Furthermore, the motor drives a second gear via its output shaft, which in turn drives the stirring shaft and stirring rod to rotate. During rotation, the stirring shaft and stirring rod not only stir the material inside the fermenter but also heat it as they move, improving heat transfer efficiency and ensuring more uniform heating, thus guaranteeing the actual fermentation quality of the fermenter.

[0014] 2. In this fermenter, the piston rod of the cylinder drives the lifting frame to descend on the base. The lifting frame drives the positioning rod to slide on the circular hole of the limiting rod, ensuring the angle of the connecting ring at the top of the tank. At this time, the lifting frame drives the top cover to descend, and the top cover inserts the limiting post into the limiting groove of the connecting ring, and squeezes the sealing gasket on the connecting ring to form a seal. At this time, the top cover, through the sealing bearing, connecting ring and sealing gasket, can avoid the influence of the rotation of the stirring shaft on the top cover while sealing the opening of the stirring shaft, reducing the heat loss at the opening of the stirring shaft. Furthermore, by raising the top cover, the pure water inside the stirring shaft and stirring rod can be replaced at the opening of the stirring shaft, improving the convenience of fermenter maintenance. Attached Figure Description

[0015] Figure 1 This is a three-dimensional front view of the structure of this utility model;

[0016] Figure 2 This is a three-dimensional sectional view of the structure of this utility model.

[0017] Figure 3 This is a front sectional perspective view of the stirring shaft structure of this utility model;

[0018] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A;

[0019] Figure 5 This is a frontal perspective three-dimensional schematic diagram of the base structure of this utility model;

[0020] Figure 6 This is a frontal cross-sectional exploded view of the top structure of the stirring shaft of this utility model.

[0021] In the diagram: 1. Tank body; 11. Inlet; 12. Outlet; 13. Water inlet; 2. Stirring shaft; 21. Stirring rod; 22. First gear; 23. Motor; 24. Second gear; 3. Base; 31. Lifting frame; 32. Cylinder; 33. Electrical box; 34. Top cover; 35. Electric heating rod; 4. Sealed bearing; 41. Connecting ring; 42. Sealing gasket; 43. Limiting post; 44. Limiting rod; 45. Positioning rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-6 One embodiment provided by this utility model:

[0024] A fermenter for anaerobic fermentation includes a tank body 1, a feed inlet 11 at the top of the tank body 1, a discharge outlet 12 at the bottom of the tank body 1, a water inlet 13 on the surface of the tank body 1, and a stirring mechanism on the surface of the tank body 1. The stirring mechanism includes a stirring shaft 2, which is rotatably connected to the surface of the tank body 1. A stirring rod 21 is fixedly connected to the surface of the stirring shaft 2, and a first gear 22 is fixedly connected to the top of the stirring shaft 2. A motor 23 is fixedly connected to the top of the tank body 1, and a second gear 24 is fixedly connected to the output shaft of the motor 23. The stirring mechanism stirs the material inside the tank body 1 through multiple sets of stirring rods 21. A heating mechanism is provided at the top of the tank body 1, including a base 3, which is fixedly connected to the top of the tank body 1. A lifting frame 31 is slidably connected to the surface of the base 3, and a cylinder 32 is fixedly connected to the surface of the tank body 1. The piston rod of the cylinder 32 is fixedly connected to the bottom of the lifting frame 31. A junction box 33 is fixedly installed on the surface of the lifting frame 31. An electric heating rod 35 is fixedly installed at the output end of the junction box 33. The junction box 33 and the electric heating rod 35 are existing technologies. The junction box 33 causes the electric heating rod 35 to heat up when powered. A top cover 34 is fixedly installed on the top of the electric heating rod 35. A sealing bearing 4 is fixedly connected to the top of the stirring shaft 2. A connecting ring 41 is fixedly connected to the rotating end of the sealing bearing 4. A sealing gasket 42 is fixedly connected to the surface of the connecting ring 41. A limit post 43 is fixedly connected to the bottom of the top cover 34. A limit rod 44 is fixedly connected to one side of the connecting ring 41. A positioning rod 45 is fixedly connected to the bottom of the lifting frame 31. The positioning rod 45 is slidably connected to the surface of the limit rod 44. Its heating mechanism is set on the stirring shaft 2 and the stirring rod 21, which can heat the inside of the tank 1 while stirring, improve the efficiency of heat conduction, and make the heating more uniform, thus ensuring the actual fermentation quality of the fermenter.

[0025] Furthermore, the stirring shaft 2 and the stirring rod 21 are hollow, and their interiors are interconnected. The top of the stirring shaft 2 has an opening, through which pure water is injected into the interior of the stirring shaft 2 and the stirring rod 21. Pure water has better thermal conductivity, and after the pure water inside the stirring shaft 2 and the stirring rod 21 is heated, the heat is transferred to the material inside the tank 1 through the stirring shaft 2 and the stirring rod 21.

[0026] Furthermore, the first gear 22 and the second gear 24 mesh with each other, and the motor 23 drives the second gear 24 to rotate through the output shaft. The second gear 24 drives the discharge port 12 to rotate on the tank body 1 through the first gear 22. The first gear 22 drives the stirring shaft 2 and the stirring rod 21 to rotate inside the tank body 1, thereby realizing the uniform transfer of heat inside the tank body 1. The stirring shaft 2 and the stirring rod 21 are evenly distributed inside the tank body, which improves the efficiency of heat conduction.

[0027] Furthermore, the cylinder 32 drives the lifting frame 31 to slide and rise on the surface of the base 3 via the piston rod. The lifting frame 31 drives the electrical box 33, the top cover 34 and the electric heating rod 35 to rise and fall synchronously. The top cover 34 can rise from the opening of the stirring shaft 2 to above the stirring shaft 2, exposing the opening of the stirring shaft 2, thereby facilitating the replacement of the pure water inside the stirring shaft 2 and the stirring rod 21 using equipment such as a water pump.

[0028] Furthermore, a circular hole is provided on the surface of the limiting rod 44. The lifting frame 31 drives the positioning rod 45 to slide and rise on the circular hole of the limiting rod 44. The limiting rod 44 is long enough to always slide on the circular hole of the positioning rod 45. The positioning rod 45 is restricted by the limiting rod 44 to the connecting ring 41 to rotate on the tank 1 along with the stirring shaft 2, thereby ensuring the angle of the connecting ring 41 at the top of the stirring shaft 2, which facilitates accurate positioning between the connecting ring 41 and the top cover 34.

[0029] Furthermore, limiting holes are provided on both sides of the connecting ring 41. The top cover 34 inserts the limiting post 43 into the limiting hole of the connecting ring 41 by lifting and lowering. Since the angle between the connecting ring 41 and the top cover 34 remains unchanged, the limiting post 43 can be accurately inserted into the limiting hole of the connecting ring 41, preventing the connecting ring 41 from rotating at the top of the stirring shaft 2. The stirring shaft 2 will drive the outer ring of the sealing bearing 4 to rotate at the bottom of the connecting ring 41, and the top cover 34 will press the sealing gasket 42 on the connecting ring 41 to form a seal, reducing the loss of heat at the top of the stirring shaft 2.

[0030] Furthermore, the electrical box 33 heats the pure water inside the stirring shaft 2 through the electric heating rod 35. The pure water flows through the stirring rod 21, which carries the heat to the stirring rod 21. The stirring shaft 2 and the stirring rod 21 then heat the material inside the tank 1. The top cover 34 is sealed on the top of the stirring shaft 2 through the sealing bearing 4, the connecting ring 41, and the sealing gasket 42. The stirring shaft 2 can rotate at the bottom of the top cover 34, so that the stirring shaft 2 and the stirring rod 21 will not affect the sealing of the top cover 34 on the top of the stirring shaft 2 during the stirring process.

[0031] Working principle: The interiors of the stirring shaft 2 and stirring rod 21 are hollow. Pure water is injected into the stirring shaft 2 and stirring rod 21 through the opening at the top of the stirring shaft 2. Under power supply, the electrical box 33 causes the electric heating rod 35 to heat up, which in turn heats the pure water inside the stirring shaft 2. The heat from the pure water inside the stirring shaft 2 is transferred to the pure water inside the stirring rod 21. At this time, the stirring shaft 2 and stirring rod 21 heat the material inside the tank 1. The motor 23 drives the second gear 24 to rotate through the output shaft. The second gear 24 drives the stirring shaft 2 and stirring rod 21 to rotate through the first gear 22. During the rotation, the stirring shaft 2 and stirring rod 21 not only stir the material inside the tank 1, but also heat the material during the movement, which improves the efficiency of heat conduction and makes the heating more uniform, ensuring the actual fermentation quality of the fermenter.

[0032] The piston rod of cylinder 32 drives the lifting frame 31 to descend on the base 3. The lifting frame 31 drives the positioning rod 45 to slide on the circular hole of the limiting rod 44, ensuring the angle of the connecting ring 41 at the top of the tank 1. At this time, the lifting frame 31 drives the top cover 34 to descend. The top cover 34 inserts the limiting post 43 into the limiting groove of the connecting ring 41 and squeezes the sealing gasket 42 on the connecting ring 41 to form a seal. At this time, the top cover 34, through the sealing bearing 4, the connecting ring 41 and the sealing gasket 42, can avoid the influence of the rotation of the stirring shaft 2 on the top cover 34 while sealing the opening of the stirring shaft 2, reducing the heat loss at the opening of the stirring shaft 2. Furthermore, by raising the top cover 34, the pure water inside the stirring shaft 2 and the stirring rod 21 can be replaced at the opening of the stirring shaft 2, improving the convenience of fermentation tank maintenance.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fermenter for anaerobic fermentation, characterized in that: The system includes a tank (1), with a feed inlet (11) at the top and a discharge outlet (12) at the bottom. A water inlet (13) is located on the surface of the tank (1). A stirring mechanism is also provided on the surface of the tank (1), comprising a stirring shaft (2) rotatably connected to the surface of the tank (1). A stirring rod (21) is fixedly connected to the surface of the stirring shaft (2), and a first gear (22) is fixedly connected to the top of the stirring shaft (2). A motor (23) is fixedly connected to the top of the tank (1), and a second gear (24) is fixedly connected to the output shaft of the motor (23). A heating mechanism is also provided on the top of the tank (1), comprising a base (3) fixedly connected to the top of the tank (1), and a lifting frame (31) slidably connected to the surface of the base (3). A cylinder (32) is fixedly connected to the surface of the tank (1). The piston rod of the cylinder (32) is fixedly connected to the bottom of the lifting frame (31). An electrical box (33) is fixedly installed on the surface of the lifting frame (31). An electric heating rod (35) is fixedly installed at the output end of the electrical box (33). A top cover (34) is fixedly installed on the top of the electric heating rod (35). A sealing bearing (4) is fixedly connected to the top of the stirring shaft (2). A connecting ring (41) is fixedly connected to the rotating end of the sealing bearing (4). A sealing gasket (42) is fixedly connected to the surface of the connecting ring (41). A limit post (43) is fixedly connected to the bottom of the top cover (34). A limit rod (44) is fixedly connected to one side of the connecting ring (41). A positioning rod (45) is fixedly connected to the bottom of the lifting frame (31). The positioning rod (45) is slidably connected to the surface of the limit rod (44).

2. The fermenter for anaerobic fermentation according to claim 1, characterized in that: The stirring shaft (2) and stirring rod (21) are hollow, and the interiors of the stirring shaft (2) and stirring rod (21) are interconnected. The top of the stirring shaft (2) has an opening, through which pure water is injected into the interior of the stirring shaft (2) and the interior of the stirring rod (21).

3. The fermenter for anaerobic fermentation according to claim 1, characterized in that: The first gear (22) and the second gear (24) mesh with each other. The motor (23) drives the second gear (24) to rotate through the output shaft. The second gear (24) drives the discharge port (12) to rotate on the tank (1) through the first gear (22).

4. A fermenter for anaerobic fermentation according to claim 1, characterized in that: The cylinder (32) drives the lifting frame (31) to slide and rise on the surface of the base (3) via the piston rod. The lifting frame (31) drives the electrical box (33), the top cover (34) and the electric heating rod (35) to rise and fall synchronously.

5. A fermenter for anaerobic fermentation according to claim 1, characterized in that: The limiting rod (44) has a circular hole on its surface. The lifting frame (31) drives the positioning rod (45) to slide and rise on the circular hole of the limiting rod (44). The positioning rod (45) is restricted by the limiting rod (44) to the connecting ring (41) and rotates on the tank (1) with the stirring shaft (2).

6. A fermenter for anaerobic fermentation according to claim 1, characterized in that: Limiting holes are provided on both sides of the connecting ring (41). The top cover (34) inserts the limiting post (43) into the limiting hole of the connecting ring (41) by lifting and lowering, and the top cover (34) presses the sealing gasket (42) on the connecting ring (41) to form a seal.

7. A fermenter for anaerobic fermentation according to claim 1, characterized in that: The electrical box (33) heats the pure water inside the stirring shaft (2) through an electric heating rod (35). The top cover (34) is sealed on the top of the stirring shaft (2) through a sealing bearing (4), a connecting ring (41) and a sealing gasket (42), and the stirring shaft (2) can rotate at the bottom of the top cover (34).

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