A high solids anaerobic fermentation apparatus with layered fermentation

Abstract

The application discloses a layered fermentation high-solid anaerobic fermentation device, which comprises a rack and a fermentation tank. The fermentation tank is rotatably installed on the rack and is driven to rotate by a rotary driving device. The rotation center line of the fermentation tank is perpendicular to the axis of the fermentation tank. A plurality of fermentation spaces are arranged in the inner cavity of the fermentation tank along the axis direction of the fermentation tank. Adjacent fermentation spaces are separated by a movable perforated plate which is detachably arranged in the fermentation tank. One end of the fermentation tank is a closed end, and the other end is an open end. A tank cover is installed on the fermentation tank to close the open end. The layered fermentation high-solid substrate is controlled, and the fermentation tank is periodically upside down for fermentation, so that the materials in different layers of the fermentation space can be fully contacted with the percolate. The uniformity of the fermentation substrate can be improved. The problem of low unit substrate gas production rate caused by uneven mass transfer in the high-solid anaerobic fermentation process can be solved, and the unit volume gas production rate of the fermentation tank can be improved.

Description

Technical Field

[0001] This invention relates to the field of anaerobic fermentation technology, and in particular to a high-solids anaerobic fermentation device for stratified fermentation. Background Technology

[0002] my country is a major agricultural country, producing 800 million tons of crop straw and 3 billion tons of livestock manure annually. It is also a major consumer of fossil resources, importing over 100 million tons of natural gas annually, with an import dependency exceeding 40%. Crop straw and livestock manure are excellent methane production materials; fully utilizing my country's existing straw and manure resources could generate over 200 billion cubic meters of methane, exceeding 142 million tons.

[0003] Currently, traditional anaerobic fermentation in my country suffers from low gas production per unit fermenter volume. High-solids anaerobic fermentation, on the other hand, is a process that utilizes anaerobic bacteria to decompose total solids (approximately 20% to 40%) into gases such as CH4, CO2, and H2S. High-solids anaerobic fermentation technology can improve the gas production per unit volume. However, due to the high density of solid waste and uneven mass transfer in high-solids anaerobic fermentation, the flow of gas and liquid and the transfer of heat within the fermenter are hindered. This affects the contact between anaerobic microorganisms and nutrients, as well as the emission of metabolic products, limiting the growth and metabolism of anaerobic microorganisms and resulting in a low gas production per unit volume of the fermentation substrate. Summary of the Invention

[0004] Therefore, it is necessary to provide a high-solids anaerobic fermentation device for stratified fermentation to address the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention provides a high-solids anaerobic fermentation device for layered fermentation, comprising a frame and a fermenter. The fermenter is rotatably mounted on the frame and driven to rotate by a rotation drive device. The rotation center line of the fermenter is perpendicular to its axis. The inner cavity of the fermenter is provided with a plurality of fermentation spaces arranged sequentially adjacent to each other along its axis. Adjacent fermentation spaces are separated by a movable perforated plate that can be detachably installed inside the fermenter.

[0006] Preferably, one end of the fermenter is a closed end and the other end is an open end, and a lid for closing the open end is installed on the fermenter.

[0007] Preferably, a first fixed perforated plate is fixed inside the can lid, the first fixed perforated plate is located at the end of the can lid that mates with the open end, a first adjustable perforated plate is provided inside the can lid, a plurality of first insert rods are installed on the first adjustable perforated plate, the first insert rods correspond one-to-one with the through holes of the first fixed perforated plate, a first linear drive mechanism is installed on the can lid, the first linear drive mechanism drives the first adjustable perforated plate to move closer to or away from the first fixed perforated plate, so that the first insert rods are inserted into or removed from the through holes of the first fixed perforated plate corresponding to them.

[0008] Preferably, the first linear drive mechanism includes a first screw, a first threaded tube, a first bearing, a first guide sleeve, and a first guide rod. The first threaded tube and the first guide sleeve are fixedly mounted on the first adjusting multi-hole plate. The first screw is rotatably and sealed on the can lid through the first bearing. One end of the first screw is located on the outside of the can lid, and the other end of the first screw is located on the inside of the can lid and is threadedly connected to the first threaded tube. One end of the first guide rod is fixedly connected to the inner wall of the can lid, and the other end is slidably inserted into the first guide sleeve.

[0009] Preferably, the first linear drive mechanism further includes a first rotary drive motor and a first mounting bracket. The first mounting bracket is fixedly mounted on the can lid, the first rotary drive motor is fixedly mounted on the first mounting bracket, and the output end of the first rotary drive motor is connected to the first screw drive via a coupling.

[0010] Preferably, a second fixed perforated plate is fixedly installed on one side of the fermenter near the closed end, and a second adjustable perforated plate is provided inside the fermenter and between the closed end and the second fixed perforated plate. A plurality of second insert rods are installed on the second adjustable perforated plate, and the second insert rods correspond one-to-one with the through holes of the second fixed perforated plate. A second linear drive mechanism is installed on the closed end, and the second linear drive mechanism drives the second adjustable perforated plate to move closer to or away from the second fixed perforated plate, so that the second insert rods are inserted into or removed from the through holes of the second fixed perforated plate corresponding to them.

[0011] Preferably, the second linear drive mechanism includes a second screw, a second threaded tube, a second bearing, a second guide sleeve, and a second guide rod. The second threaded tube and the second guide sleeve are fixedly installed on the second adjusting perforated plate. The second screw is rotatably and sealed on the fermenter through the second bearing. One end of the second screw is located outside the fermenter, and the other end of the second screw is located inside the fermenter and is threadedly connected to the second threaded tube. One end of the second guide rod is fixedly connected to the inner wall of the fermenter, and the other end is slidably inserted into the second guide sleeve.

[0012] Preferably, the second linear drive mechanism further includes a second rotary drive motor and a second mounting bracket. The second mounting bracket is fixedly mounted on the fermenter, and the second rotary drive motor is fixedly mounted on the second mounting bracket. The output end of the second rotary drive motor is connected to the second screw drive via a coupling.

[0013] Preferably, the movable perforated plate is fitted with the fermenter with a clearance.

[0014] Preferably, both the tank lid and the closed end are provided with biogas discharge ports, and pressure reducing valves and on / off valves are installed on the biogas discharge ports.

[0015] Compared with existing technologies, this technical solution has at least one of the following beneficial effects:

[0016] By fermenting high-solids substrates in layers and controlling the fermentation tank to be periodically inverted, the materials in different fermentation spaces can be fully contacted with the leachate, which can improve the uniformity of the fermentation substrate. This can solve the problem of low gas production per unit substrate caused by uneven mass transfer during high-solids anaerobic fermentation, and also improve the gas production per unit volume of the fermentation tank.

[0017] By inserting the first insert rod into the through hole of the first fixed porous plate, the blockage inside the through hole of the first fixed porous plate can be cleared, facilitating the flow of gas and liquid, and at the same time, the through hole of the first fixed porous plate can be basically sealed. After the fermenter is rotated 180 degrees, by driving the first insert rod to move out of the through hole of the first fixed porous plate, the leachate accumulated on the first fixed porous plate can be evenly discharged into the fermentation space below, so that the material in the fermentation space is in uniform contact with the leachate, avoiding the leachate from flowing out of proportion, improving the uniformity of the fermentation substrate, thereby ensuring the normal growth and metabolism of anaerobic microorganisms and improving the anaerobic fermentation effect.

[0018] By setting a second insert and a second fixed perforated plate that have the same function as the first insert and the first fixed perforated plate, the first fixed perforated plate and the second fixed perforated plate are located at the two ends of the fermentation tank during fermentation, so that the fermentation substrate can be uniformly flowed during the periodic inversion and rotation of the fermentation tank. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a structure according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Another state diagram (can lid open);

[0021] Figure 3 for Figure 2 Another state diagram (removal of the active perforated plate);

[0022] Figure 4 This is a side sectional view of an embodiment of the present invention;

[0023] Figure 5 for Figure 1 Another state diagram (fermenter rotating);

[0024] Figure 6 for Figure 1 A sectional view along line AA.

[0025] Figure 7 A partial schematic diagram showing the first insert rod being inserted into the through hole of the first adjusting perforated plate;

[0026] In the diagram, 1. Frame; 2. Fermentation tank; 3. Rotary drive device; 4. Fermentation space; 5. Movable perforated plate; 6. Closed end; 7. Open end; 8. Tank lid; 9. Hinge; 10. Quick clamp; 11. First fixed perforated plate; 12. First adjusting perforated plate; 13. First insert rod; 14. First screw; 15. First threaded tube; 16. First bearing; 17. First guide sleeve; 18. First guide rod; 19. First rotary drive motor; 20. Second fixed perforated plate; 21. Second adjusting perforated plate; 22. Second insert rod; 23. Second screw; 24. Second threaded tube; 25. Second bearing; 26. Second guide sleeve; 27. Second guide rod; 28. Second rotary drive motor; 29. ​​Biogas outlet; 30. Pressure reducing valve; 31. On / off valve. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Please see Figures 1 to 7 This application provides a high-solids anaerobic fermentation device for layered fermentation, including a frame 1 and a fermentation tank 2. The fermentation tank 2 is rotatably mounted on the frame 1 and driven to rotate by a rotation drive device 3. The rotation center line of the fermentation tank 2 is perpendicular to its axis. Multiple fermentation spaces 4 are arranged sequentially and adjacently in the inner cavity of the fermentation tank 2 along its axis. Adjacent fermentation spaces 4 are separated by a movable perforated plate 5 that is detachably installed in the fermentation tank 2.

[0029] The fermentation process in this embodiment adopts batch fermentation and non-continuous feeding and discharging. When the material is filled at the beginning of fermentation, the material is laid layer by layer on the movable perforated plate 5. The material height of each fermentation space 4 is about 10cm. After one layer of material is laid, the next layer of movable perforated plate 5 is placed. When discharging, the movable perforated plate 5 is disassembled in sequence to discharge the material. The movable perforated plate 5 can ensure that the leachate in the upper fermentation space 4 can seep into the lower fermentation space 4 under the action of gravity.

[0030] In this embodiment, the rotary drive device 3 is mounted on the frame 1. The rotary drive device 3 is a worm gear reducer stepper motor. Two symmetrically arranged fixed shafts are fixed on the fermentation tank 2. The fixed shafts are rotatably mounted on the frame 1 through bearings. The output end of the rotary drive device 3 is connected to the fixed shafts through a coupling or other transmission components. The rotary drive device 3 drives the fermentation tank 2 to rotate 180 degrees each time. After driving the fermentation tank 2 to rotate 180 degrees clockwise, the rotary drive device 3 drives the fermentation tank 2 to rotate 180 degrees counterclockwise, so that the fermentation tank 2 is alternately reversed. The frequency of reversal of the fermentation tank 2 during the fermentation process is generally 1-2 times / day. During the reversal of the fermentation tank 2, the leachate in the fermentation substrate can flow up and down, which plays a role in mixing the fermentation substrate and ensuring that the materials in different layers of the fermentation space 4 can fully contact the leachate. As a carrier of microorganisms, the leachate contains a large number of microorganisms, including anaerobic bacteria and facultative anaerobic bacteria. These microorganisms play a key role in the anaerobic fermentation process, decomposing organic matter to produce biogas, biogas slurry, biogas residue and other products. The leachate also contains certain nutrients, such as nitrogen and phosphorus, which play an important role in the growth and reproduction of microorganisms during anaerobic fermentation. The leachate can also regulate the fermentation environment, and the moisture content in the leachate has a significant impact on the anaerobic fermentation process, thus facilitating its smooth progress.

[0031] The materials used for fermentation are agricultural waste such as straw and livestock manure. The fermentation time varies depending on the material; straw typically ferments for 90 days, while livestock manure ferments for 50 days. When the gas production is less than 50% of the maximum gas production, fermentation is considered sufficient, and material can be added or removed. Each removal should not exceed 70% of the original material volume. The fermentation product is a good organic fertilizer and can be used as a base fertilizer for crops.

[0032] The outer layer of fermenter 2 can be set as an insulation layer or a heating layer, which helps to maintain the fermentation temperature of fermenter 2 above 30 degrees Celsius.

[0033] In one specific embodiment, to facilitate the feeding, discharging, and loading / unloading of the movable perforated plate 5, the fermentation tank 2 is configured with one closed end 6 and the other open end 7. A tank lid 8 is installed on the fermentation tank 2 to seal the open end 7. The tank lid 8 is hinged to the fermentation tank 2 via a hinge 9, and the tank lid 8 is locked to the fermentation tank 2 via a quick-release clamp 10. The inner side of the tank lid 8 is concave, forming a certain space. During feeding and discharging, the quick-release clamp 10 is opened to open the tank lid 8, facilitating the feeding, discharging, and loading / unloading of the movable perforated plate 5. During fermentation, the quick-release clamp 10 locks the tank lid 8 to the fermentation tank 2, sealing the open end 7 of the fermentation tank 2 and preventing material leakage.

[0034] In one specific embodiment, to prevent the leachate from flowing off course during the rotation of the fermentation tank 2 when the lid 8 is in the lower position of the fermentation tank 2, thus preventing it from contacting the material at different positions in the fermentation space 4 evenly, a first fixed perforated plate 11 is fixed inside the lid 8. The first fixed perforated plate 11 is located at the end of the lid 8 that cooperates with the open end 7. A first adjusting perforated plate 12 is provided inside the lid 8. A plurality of first insert rods 13 are installed on the first adjusting perforated plate 12. The first insert rods 13 correspond one-to-one with the through holes of the first fixed perforated plate 11. A first linear drive mechanism is installed on the lid 8. The first linear drive mechanism drives the first adjusting perforated plate 12 to move closer to or away from the first fixed perforated plate 11, so that the first insert rods 13 are inserted into or removed from the through holes of the first fixed perforated plate 11 corresponding to them.

[0035] In this embodiment, the first insertion rod 13 and the through hole of the first fixed porous plate 11 are configured for clearance fit. When the first insertion rod 13 is inserted into the through hole of the first fixed porous plate 11, it can clear the blockage in the through hole of the first fixed porous plate 11, facilitating the flow of gas and liquid. At the same time, it can basically seal the through hole of the first fixed porous plate 11, preventing a large amount of leachate accumulated on the first fixed porous plate 11 from flowing into the fermentation space 4 when the fermenter 2 rotates. If the through hole of the first fixed porous plate 11 is not sealed, the leachate accumulated in the tank cover 8 will accumulate and flow to one side of the tank cover 8 due to gravity during the rotation of the fermenter 2, and flow from the through hole of the first fixed porous plate 11 on that side to the same side of the fermenter 2. This results in more contact between the material on one side of the fermentation space 4 and the leachate, while the material on the other side has less contact with the leachate. This leachate flow deviation prevents the leachate from contacting the material at different positions in the fermentation space 4 evenly, affecting the growth and metabolism of anaerobic microorganisms and the anaerobic fermentation effect. Therefore, when the fermenter 2 rotates, the through holes of the first fixed porous plate 11 are basically closed by the first insert rod 13, restricting the leachate from flowing out of the through holes of the first fixed porous plate 11; and after the fermenter 2 rotates 180 degrees, the first fixed porous plate 11 and the accumulated leachate that were originally at the bottom of the fermenter 2 rotate to the top of the fermenter 2, and the leachate accumulated on the first fixed porous plate 11 is horizontally and evenly distributed. At this time, the first adjusting porous plate 12 is driven away from the first fixed porous plate 11 by the first linear drive mechanism, so that the first insert rod 13 moves out of the through hole of the corresponding first fixed porous plate 11, and the leachate accumulated on the first fixed porous plate 11 can be evenly discharged to the fermentation space 4 below it, so that the material in the fermentation space 4 is in uniform contact with the leachate, avoiding the leachate from flowing out of the plate, improving the uniformity of the fermentation substrate, thereby ensuring the normal growth and metabolism of anaerobic microorganisms and improving the anaerobic fermentation effect.

[0036] In one specific embodiment, to facilitate the insertion or removal of the first insertion rod 13 into or out of the through hole of the corresponding first fixed perforated plate 11, a first linear drive mechanism is provided, including a first screw 14, a first threaded tube 15, a first bearing 16, a first guide sleeve 17, and a first guide rod 18. The first threaded tube 15 and the first guide sleeve 17 are fixedly installed on the first adjusting perforated plate 12. The first screw 14 is rotatably and sealed on the can cover 8 through the first bearing 16. One end of the first screw 14 is located on the outside of the can cover 8, and the other end of the first screw 14 is located on the inside of the can cover 8 and is threadedly connected to the first threaded tube 15. One end of the first guide rod 18 is fixedly connected to the inner wall of the can cover 8, and the other end is slidably inserted into the first guide sleeve 17. The first screw 14, located inside the tank cover 8, has an external thread that engages with the first threaded tube 15. The section of the first screw 14 located outside the tank cover 8 is smooth, facilitating connection with the first bearing 16. The first bearing 16 is a sealed bearing, enabling a rotary sealed connection between the first screw 14 and the tank cover 8, preventing gas and liquid leakage from the connection point. By rotating the first screw 14, under the guiding and limiting action of the first guide sleeve 17 and the first guide rod 18, the first threaded tube 15 converts the rotational motion of the first screw 14 into linear motion, driving the first adjusting perforated plate 12 to move linearly. The number of first guide sleeves 17 and first guide rods 18 can be set to multiple, thereby improving the stability of the first adjusting perforated plate 12. The axes of the tank cover 8, the first guide sleeve 17, and the first guide rod 18 are arranged parallel to the axis of the fermenter 2.

[0037] In one specific embodiment, to facilitate the rotation of the first screw 14, the first linear drive mechanism further includes a first rotary drive motor 19 and a first mounting bracket. The first mounting bracket is fixedly mounted on the can lid 8, and the first rotary drive motor 19 is fixedly mounted on the first mounting bracket. The output end of the first rotary drive motor 19 is connected to the first screw 14 via a coupling. The first rotary drive motor 19 is a stepper motor, which can drive the first screw 14 to rotate by a preset angle, causing the first adjusting perforated plate 12 to move a preset distance, facilitating the insertion or removal of the first insertion rod 13 from the through hole of the first fixed perforated plate. In other embodiments, a handle can also be directly installed on the first screw 14, allowing manual rotation of the first screw 14.

[0038] In one specific embodiment, to prevent the leachate from flowing off course during the rotation of the fermentation tank 2 when the closed end 6 is at the lower end of the fermentation tank 2, thus preventing it from contacting the material at different positions in the fermentation space 4 evenly, a second fixed perforated plate 20 is fixedly installed on the side of the fermentation tank 2 near the closed end 6. A second adjusting perforated plate 21 is provided inside the fermentation tank 2 and between the closed end 6 and the second fixed perforated plate 20. A plurality of second insert rods 22 are installed on the second adjusting perforated plate 21, and the second insert rods 22 correspond one-to-one with the through holes of the second fixed perforated plate 20. A second linear drive mechanism is installed on the closed end 6. The second linear drive mechanism drives the second adjusting perforated plate 21 to move closer to or away from the second fixed perforated plate 20, so that the second insert rods 22 are inserted into or removed from the through holes of the second fixed perforated plate 20 corresponding to them.

[0039] In this embodiment, the second insertion rod 22 and the through hole of the second fixed porous plate 20 are configured with a clearance fit. When the second insertion rod 22 is inserted into the through hole of the second fixed porous plate 20, it can clear the blockage in the through hole of the second fixed porous plate 20, facilitating the flow of gas and liquid. At the same time, it can basically seal the through hole of the second fixed porous plate 20, preventing a large amount of leachate accumulated on the second fixed porous plate 20 from flowing into the fermentation space 4 when the fermenter 2 rotates. If the through hole of the second fixed porous plate 20 is not sealed, the leachate accumulated on the inner side of the closed end 6 will flow towards the side wall of the lower end of the fermenter 2 under gravity during the rotation of the fermenter 2, and flow from the through hole of the second fixed porous plate 20 on that side to the same side of the fermenter 2. This results in more contact between the material on one side of the fermentation space 4 and the leachate, while the material on the other side has less contact with the leachate. The leachate flow deviation causes the leachate to not contact the material at different positions in the fermentation space 4 evenly, affecting the growth and metabolism of anaerobic microorganisms and the anaerobic fermentation effect. Therefore, when the fermenter 2 rotates, the through holes of the second fixed porous plate 20 are basically closed by the second insert rod 22, restricting the leachate from flowing out of the through holes of the second fixed porous plate 20; and after the fermenter 2 rotates 180 degrees, the second fixed porous plate 20 and the accumulated leachate that were originally at the bottom of the fermenter 2 rotate to the top of the fermenter 2. At this time, the leachate accumulated on the second fixed porous plate 20 is horizontally and evenly distributed. Then, the second adjusting porous plate 21 is driven away from the second fixed porous plate 20 by the second linear drive mechanism, so that the second insert rod 22 moves out of the through hole of the corresponding second fixed porous plate 20, and the leachate accumulated on the second fixed porous plate 20 is evenly discharged to the fermentation space 4 below it, so that the material in the fermentation space 4 is in uniform contact with the leachate, avoiding the leachate from flowing out of the plate, improving the uniformity of the fermentation substrate, thereby ensuring the normal growth and metabolism of anaerobic microorganisms and improving the anaerobic fermentation effect.

[0040] In one specific embodiment, to facilitate the insertion or removal of the second insertion rod 22 into or out of the corresponding through hole of the second fixed perforated plate 20, a second linear drive mechanism is provided, including a second screw 23, a second threaded tube 24, a second bearing 25, a second guide sleeve 26, and a second guide rod 27. The second threaded tube 24 and the second guide sleeve 26 are fixedly installed on the second adjusting perforated plate 21. The second screw 23 is rotatably and sealed on the fermenter 2 through the second bearing 25. One end of the second screw 23 is located outside the fermenter 2, and the other end of the second screw 23 is located inside the fermenter 2 and is threadedly connected to the second threaded tube 24. One end of the second guide rod 27 is fixedly connected to the inner wall of the fermenter 2, and the other end is slidably inserted into the second guide sleeve 26. The second screw 23 has an external thread on its inner section at the closed end 6 that engages with the threaded section of the second threaded tube 24. The outer section of the second screw 23 at the fermenter 2 is a smooth section, facilitating connection with the second bearing 25. The second bearing 25 is a sealed bearing, enabling a rotary sealed connection between the second screw 23 and the fermenter 2, preventing gas and liquid leakage from the connection point. By rotating the second screw 23, under the guiding and limiting action of the second guide sleeve 26 and the second guide rod 27, the second threaded tube 24 converts the rotational motion of the second screw 23 into linear motion, driving the second adjusting perforated plate 21 to move linearly. Multiple second guide sleeves 26 and second guide rods 27 can be used to improve the stability of the second adjusting perforated plate 21. The axes of the second guide sleeve 26 and the second guide rod 27 are parallel to the axis of the fermenter 2.

[0041] In one specific embodiment, to facilitate the rotation of the second screw 23, the second linear drive mechanism further includes a second rotary drive motor 28 and a second mounting bracket. The second mounting bracket is fixedly mounted on the fermenter 2, and the second rotary drive motor 28 is fixedly mounted on the second mounting bracket. The output end of the second rotary drive motor 28 is connected to the second screw 23 via a coupling. The second rotary drive motor 28 is a stepper motor, which can drive the second screw 23 to rotate by a preset angle, causing the second adjusting perforated plate 21 to move a preset distance, facilitating the insertion or removal of the second insertion rod 22 into or out of the through hole of the second fixed perforated plate. In other embodiments, a handle can also be directly installed on the second screw 23 for manual rotation.

[0042] In one specific embodiment, to facilitate the disassembly of the movable perforated plate 5 and the loading and unloading of fermentation materials, the movable perforated plate 5 is fitted with a gap in the fermentation tank 2. This allows for easy disassembly of the movable perforated plate 5. Before fermentation, when filling the tank with materials, a layer of material is first laid on the second fixed perforated plate 20, then the movable perforated plate 5 is placed inside the fermentation tank 2 on top of the bottom layer of material. A second layer of material is then laid on the movable perforated plate 5, and so on, with the top layer of material held in place by the first fixed perforated plate 11 and the tank lid 8. During discharge, the movable perforated plates 5 are removed sequentially for discharging.

[0043] In one specific embodiment, to facilitate the collection and discharge of biogas, biogas discharge ports 29 are provided on both the tank cover 8 and the closed end 6. A pressure reducing valve 30 and an on / off valve 31 are installed on the biogas discharge ports 29. The on / off valve 31 is a manual valve; in other embodiments, it can also be a solenoid valve. During the inversion of the fermentation tank 2, the biogas is discharged after being depressurized by the pressure reducing valve 30 by opening the on / off valve 31, thus achieving the collection and discharge of biogas. The on / off valve 31 prevents leachate from flowing away from the biogas discharge port 29 after the fermentation tank 2 is inverted.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. A high-solids anaerobic fermentation device for layered fermentation, comprising a frame (1) and a fermenter (2), characterized in that, The fermenter (2) is rotatably mounted on the frame (1) and driven by the rotation drive device (3) to periodically reverse up and down. The rotation center line of the fermenter (2) is perpendicular to its axis. The fermenter (2) has multiple fermentation spaces (4) arranged sequentially and adjacently in the inner cavity along its axis. The adjacent fermentation spaces (4) are separated by a movable perforated plate (5) that can be detached and installed in the fermenter (2). The fermentation tank (2) has a closed end (6) at one end and an open end (7) at the other end. The fermentation tank (2) is equipped with a lid (8) for closing the open end (7). The can lid (8) is fixed with a first fixed perforated plate (11), which is located at the end of the can lid (8) that cooperates with the open end (7). The can lid (8) is provided with a first adjustable perforated plate (12), which is equipped with a number of first insert rods (13). The first insert rods (13) correspond one-to-one with the through holes of the first fixed perforated plate (11). The can lid (8) is equipped with a first linear drive mechanism, which drives the first adjustable perforated plate (12) to move closer to or away from the first fixed perforated plate (11) so that the first insert rods (13) can be inserted into or removed from the through holes of the first fixed perforated plate (11) corresponding to them. A second fixed perforated plate (20) is fixedly installed on one side of the fermenter (2) near the closed end (6). A second adjustable perforated plate (21) is provided in the fermenter (2) between the closed end (6) and the second fixed perforated plate (20). A number of second insert rods (22) are installed on the second adjustable perforated plate (21). The second insert rods (22) correspond one-to-one with the through holes of the second fixed perforated plate (20). A second linear drive mechanism is installed on the closed end (6). The second linear drive mechanism drives the second adjustable perforated plate (21) to move closer to or away from the second fixed perforated plate (20) so that the second insert rods (22) can be inserted into or removed from the through holes of the corresponding second fixed perforated plate (20).

2. The high-solids anaerobic fermentation apparatus for layered fermentation according to claim 1, characterized in that, The first linear drive mechanism includes a first screw (14), a first threaded tube (15), a first bearing (16), a first guide sleeve (17), and a first guide rod (18). The first threaded tube (15) and the first guide sleeve (17) are fixedly installed on the first adjusting perforated plate (12). The first screw (14) is rotatably and sealed on the can cover (8) through the first bearing (16). One end of the first screw (14) is located outside the can cover (8), and the other end of the first screw (14) is located inside the can cover (8) and is threadedly connected to the first threaded tube (15). One end of the first guide rod (18) is fixedly connected to the inner wall of the can cover (8), and the other end is slidably inserted into the first guide sleeve (17).

3. The high-solids anaerobic fermentation apparatus for layered fermentation according to claim 2, characterized in that, The first linear drive mechanism also includes a first rotary drive motor (19) and a first mounting bracket. The first mounting bracket is fixedly mounted on the can cover (8), and the first rotary drive motor (19) is fixedly mounted on the first mounting bracket. The output end of the first rotary drive motor (19) is connected to the first screw (14) via a coupling.

4. The high-solids anaerobic fermentation apparatus for layered fermentation according to claim 1, characterized in that, The second linear drive mechanism includes a second screw (23), a second threaded tube (24), a second bearing (25), a second guide sleeve (26), and a second guide rod (27). The second threaded tube (24) and the second guide sleeve (26) are fixedly installed on the second adjusting perforated plate (21). The second screw (23) is rotatably and sealed on the fermenter (2) through the second bearing (25). One end of the second screw (23) is located outside the fermenter (2), and the other end of the second screw (23) is located inside the fermenter (2) and threadedly connected to the second threaded tube (24). One end of the second guide rod (27) is fixedly connected to the inner wall of the fermenter (2), and the other end is slidably inserted into the second guide sleeve (26).

5. The high-solids anaerobic fermentation apparatus for layered fermentation according to claim 4, characterized in that, The second linear drive mechanism also includes a second rotary drive motor (28) and a second mounting bracket. The second mounting bracket is fixedly installed on the fermenter (2), and the second rotary drive motor (28) is fixedly installed on the second mounting bracket. The output end of the second rotary drive motor (28) is connected to the second screw (23) via a coupling.

6. The high-solids anaerobic fermentation apparatus for layered fermentation according to claim 1, characterized in that, The movable perforated plate (5) is fitted with the fermenter (2) with a clearance.

7. The high-solids anaerobic fermentation apparatus for layered fermentation according to claim 1, characterized in that, Both the tank cover (8) and the closed end (6) are provided with biogas discharge ports (29), and the biogas discharge ports (29) are equipped with pressure reducing valves (30) and on / off valves (31).

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