Liquid manure anaerobic fermentation equipment

Abstract

This invention relates to the field of liquid manure anaerobic fermentation technology, specifically a liquid manure anaerobic fermentation device, including a fermentation tank and a support frame located at the bottom of the outer side of the fermentation tank for supporting it. A feed pipe is connected to the top cover of the fermentation tank, and a machine box is located at the center of the top of the cover. A drain pipe is connected to the bottom of the outer side of the fermentation tank, and a sleeve is fixedly connected at the center of the top of the cover. A pushing and rotating column is slidably connected inside the sleeve. The bottom of the fermentation tank is conical, and an adjustment component is provided in the inner cavity of the fermentation tank. This invention precisely adjusts the exhaust volume through the pushing and rotating column linked to the slider, balances the pressure through the annular gas distribution pipe, and combines an adjustable and rotatable impeller and spiral blades to form a circulating flow field, with scrapers preventing material adhesion. These three elements work together to enhance gas-liquid mixing and material circulation, solving the problems of stratification and adhesion, maintaining high activity of anaerobic bacteria, and achieving efficient anaerobic fermentation of liquid manure.

Description

Technical Field

[0001] This invention relates to the field of liquid manure anaerobic fermentation technology, specifically to a liquid manure anaerobic fermentation device. Background Technology

[0002] Anaerobic fermentation of liquid manure is an environmentally friendly treatment and resource recovery technology for high-concentration organic waste liquid (such as livestock and poultry breeding wastewater). Its core principle is to use the synergistic metabolic action of anaerobic microorganisms such as acid-producing bacteria and methanogenic bacteria in an anaerobic or hypoxic environment to gradually decompose complex organic pollutants in liquid manure into biogas mainly composed of methane and carbon dioxide, while simultaneously reducing and stabilizing organic pollutants.

[0003] Current mainstream anaerobic fermentation technology for liquid sewage still has many shortcomings. For example, a self-heating circulating multi-tank nested anaerobic fermentation device with application number 2022101734628 adopts a fixed multi-tank nested structure and lacks a flexible and adjustable stirring mechanism. The liquid sewage to be treated can only be fermented in a fixed process. Moreover, the device is not equipped with a structure for coordinated control of exhaust and stirring. It only relies on a closed design to maintain the anaerobic environment and does not have a precise gas replenishment mechanism, which leads to uneven mixing of materials in the tank and difficulty in controlling pressure fluctuations, ultimately affecting the fermentation effect.

[0004] To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a liquid anaerobic fermentation device for sewage to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A liquid anaerobic fermentation device for sewage includes a fermentation tank and a support frame disposed at the bottom outer side of the fermentation tank for supporting it. The top cover of the fermentation tank is connected to a feed pipe. An organic box is disposed at the center of the top of the cover. A sewage discharge pipe is connected to the bottom outer side of the fermentation tank. A sleeve is fixedly connected at the center of the top of the cover. A pushing and rotating column is slidably connected inside the sleeve. The bottom of the fermentation tank is conical. An adjustment component is disposed in the inner cavity of the fermentation tank.

[0008] Furthermore, a mounting frame is fixedly connected to the center position of the bottom of the inner wall of the fermentation tank, and a central block is rotatably connected to the top of the mounting frame;

[0009] The steering assembly includes a sliding sleeve that slides against the outer wall of the center block. The bottom end of the pushing rotating column is fixedly connected to the top of the sliding sleeve. A rotating block is rotatably connected to the outer wall of the center block at equal angles. A connecting block and a propeller are fixedly connected to one end of the rotating block.

[0010] Furthermore, a limiting block is fixedly connected to the outer side wall of the sliding sleeve at an equal angle, and a horizontal limiting groove is provided on the side wall of the limiting block. One end of the connecting block is fixedly connected to a toggle rod that slides in the horizontal limiting groove.

[0011] The outer wall of the sliding sleeve has multiple sets of vertical sliding grooves at equal angles, and the rotating block is located in the vertical sliding grooves.

[0012] Furthermore, multiple sets of stirring components and multiple sets of threaded blades are fixedly sleeved on the outer side of the pushing rotating column, and the stirring components and threaded blades are arranged at intervals. The stirring component is composed of multiple stirring rods. An annular frame is fixedly connected to the outer wall of the pushing rotating column through a support crossbar. Multiple sets of scrapers are rotatably connected to the outer side of the annular frame at equal angles, and a torsion spring is installed at the rotatable connection between the scraper and the annular frame.

[0013] Furthermore, the interior of the chassis is rotatably connected to a worm gear and a worm wheel via corresponding brackets. A servo motor for driving the worm gear is fixedly installed on the top of the inner wall of the chassis. A drive shaft with a polygonal cross-section is rotatably connected to the bottom end of the worm gear. A drive sleeve that slides with the drive shaft is slidably connected to the outer wall of the drive shaft, and the bottom end of the drive sleeve is fixedly connected to the top end of the push rotating column.

[0014] Furthermore, eccentric wheels are fixedly connected to both sides of the worm gear, and a pusher is movably connected to the outer side of the eccentric wheels. A deflection frame is also rotatably connected inside the casing. The bottom end of the pusher is movably connected to the deflection frame. A first annular frame is fixedly fitted on the outer side of the drive sleeve. A ventilator connected to the fermentation tank is fixedly connected to the top of the box cover.

[0015] Furthermore, the ventilation cylinder has a slider slidably connected inside, and a sealing strip is provided on the outside of the slider. A pull rod is fixedly connected to the top of the slider, and a second annular frame is fixedly connected to one end of the pull rod at the top of the ventilation cylinder. Both ends of the deflection frame have drive blocks fixedly installed on their inner walls in a detachable manner, and the drive blocks cooperate with the inner cavities of the corresponding first and second annular frames.

[0016] Furthermore, the outer wall of the ventilator is connected to a vent pipe, and a valve is fixedly installed on the vent pipe near the ventilator.

[0017] Furthermore, the bottom of the fermentation tank is connected to an annular gas distribution pipe, and one end of the annular gas distribution pipe located inside the fermentation tank has an air hole. The inner wall of the fermentation tank is fixedly installed with a limiting frame to improve the rotation and sliding stability of the pushing rotating column.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. During the downward movement of the pushing rotating column of this invention, it directly drives the slider inside the venting cylinder to slide upward, simultaneously widening the gas flow path to improve exhaust efficiency and quickly release the accumulated gas produced by fermentation inside the tank, avoiding high-pressure strong impact on the liquid surface. When the pushing rotating column moves upward, it pulls the slider downward, narrowing the flow channel, reducing the exhaust volume, and preventing a sudden drop in pressure inside the tank from causing violent fluctuations in the liquid surface. At the same time, the annular gas distribution pipe continuously introduces gas suitable for anaerobic bacteria, offsetting the changes in the internal volume of the tank caused by the raising and lowering of the stirring component, fundamentally ensuring the stability of the liquid surface and the continuous controllability of the anaerobic environment.

[0020] 2. The impeller achieves both rotational motion and angle deflection through the linkage of the sliding sleeve and the limiting block. The deflection adjustment can expand the stirring coverage area. When rotating, it can both horizontally stir the material at the bottom of the tank to break up the static layer and generate an upward thrust to drive the liquid at the bottom of the tank to surge upward. The spiral blades rotate synchronously with the pushing rotating column, continuously generating an upward spiral thrust, driving the liquid in the tank to form an up-and-down circulating flow field. The gas sprayed from the annular gas distribution pipe is broken into tiny bubbles by the impeller stirring, which greatly increases the gas-liquid contact area. The three work together to promote the thorough mixing of anaerobic bacteria and liquid sewage, while accelerating the escape of fermentation gas from the bottom of the tank, significantly improving the fermentation reaction rate.

[0021] 3. The combination of paddle angle adjustment and spiral blade circulation push completely solves the problem of material stratification inside the tank; the annular gas distribution pipe not only accurately replenishes anaerobic gas and balances the pressure inside the tank, but the microbubbles it generates can also further enhance the material mixing effect; the matching scraper structure rotates against the tank wall under the drive of the annular frame, effectively avoiding the loss of bacteria and waste of effective fermentation space caused by material adhering to the tank wall, and with the precise adjustment of exhaust volume as the pushing and rotating column rises and falls, the high-activity metabolic state of anaerobic bacteria is maintained throughout the process, ultimately achieving efficient anaerobic fermentation of liquid sewage. Attached Figure Description

[0022] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings;

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the fermentation tank structure in this invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of the fermentation tank in this invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the chassis in this invention;

[0027] Figure 5 This is a schematic diagram of the installation of the drive sleeve and the first annular frame in this invention;

[0028] Figure 6 This is a schematic diagram of the stirring rod structure in this invention;

[0029] Figure 7 This is a schematic diagram of the propeller structure in this invention;

[0030] Figure 8 This is a schematic diagram of the rotating block structure in this invention;

[0031] Figure 9 This is a schematic diagram of the box cover structure in this invention;

[0032] Figure 10 This is a schematic diagram of the internal structure of the ventilator in this invention.

[0033] Attached reference numerals: 101, Fermentation tank body; 102, Tank cover; 2, Support frame; 3, Feed pipe; 4, Chassis; 5, Drain pipe; 6, Sleeve; 7, Pushing rotating column; 8, Mounting frame; 801, Center block; 901, Sliding sleeve; 902, Rotating block; 903, Connecting block; 904, Paddle; 905, Limiting block; 906, Actuating rod; 10, Stirring rod; 11, Threaded blade; 12, Annular frame 13. Frame; 14. Scraper; 15. Worm; 16. Worm Gear; 17. Servo Motor; 18. Drive Shaft; 19. Drive Sleeve; 20. Eccentric Wheel; 21. Push Frame; 22. Deflection Frame; 23. First Annular Frame; 24. Ventilation Pipe; 25. Slider; 26. Pull Rod; 27. Second Annular Frame; 28. Drive Block; 29. ​​Ventilation Pipe; 30. Valve; 31. Annular Air Distribution Pipe. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1; as Figure 1 - Figure 10As shown, a liquid manure anaerobic fermentation device includes a fermentation tank 101 and a support frame 2 located at the bottom outer side of the fermentation tank 101 for supporting it. A feed pipe 3 is connected to the top cover 102 of the fermentation tank 101. An organic box 4 is located at the center of the top of the cover 102. A sewage pipe 5 is connected to the bottom outer side of the fermentation tank 101. A sleeve 6 is fixedly connected to the center of the top of the cover 102. A pushing and rotating column 7 is slidably connected inside the sleeve 6. The bottom of the fermentation tank 101 is conical. An adjustment component is provided in the inner cavity of the fermentation tank 101.

[0036] A mounting bracket 8 is fixedly connected to the center position of the bottom of the inner wall of the fermentation tank 101, and a center block 801 is rotatably connected to the top of the mounting bracket 8; the steering assembly includes a sliding sleeve 901 that slides against the outer wall of the center block 801, the bottom end of the pushing rotating column 7 is fixedly connected to the top of the sliding sleeve 901, and a rotating block 902 is rotatably connected to the outer wall of the center block 801 at an equal angle, and a connecting block 903 and a rotor 904 are fixedly connected to one end of the rotating block 902.

[0037] The outer side wall of the sliding sleeve 901 is fixedly connected to the limiting block 905 at equal angles. The side wall of the limiting block 905 is provided with a horizontal limiting groove. One end of the connecting block 903 is fixedly connected to a toggle rod 906 that slides in the horizontal limiting groove. The outer side wall of the sliding sleeve 901 is provided with multiple sets of vertical grooves at equal angles, and the rotating block 902 is located in the vertical groove.

[0038] Example 2: Multiple sets of stirring components and multiple sets of threaded blades 11 are fixedly sleeved on the outer side of the pushing rotating column 7, and the stirring components and threaded blades 11 are spaced apart. The stirring components are composed of multiple stirring rods 10. An annular frame 12 is fixedly connected to the outer wall of the pushing rotating column 7 through a support crossbar. Multiple sets of scrapers 13 are rotatably connected to the outer side of the annular frame 12 at equal angles, and a torsion spring is installed at the rotatable connection between the scraper 13 and the annular frame 12.

[0039] Inside the chassis 4, a worm gear 14 and a worm wheel 15 are rotatably connected via corresponding brackets. A servo motor 16 for driving the worm gear 14 to rotate is fixedly installed on the top of the inner wall of the chassis 4. A drive shaft 17 with a polygonal cross-section is rotatably connected to the bottom end of the worm gear 14. A drive sleeve 18 that slides with the drive shaft 17 is slidably connected to the outer wall of the drive shaft 17. The bottom end of the drive sleeve 18 is fixedly connected to the top end of the push rotating column 7.

[0040] Eccentric wheels 19 are fixedly connected to both sides of the worm gear 15. A pusher frame 20 is movably connected to the outer side of the eccentric wheel 19. A deflector frame 21 is also rotatably connected inside the casing 4. The bottom end of the pusher frame 20 is movably connected to the deflector frame 21. A first annular frame 22 is fixedly fitted on the outer side of the drive sleeve 18. A ventilator 23 connected to the fermentation tank 101 is fixedly connected to the top of the box cover 102.

[0041] The ventilation cylinder 23 has a sliding block 24 inside, and a sealing strip is provided on the outside of the sliding block 24. A pull rod 25 is fixedly connected to the top of the sliding block 24. A second annular frame 26 is fixedly connected to one end of the pull rod 25 at the top of the ventilation cylinder 23. Both ends of the deflection frame 21 have drive blocks 27 fixedly installed on their inner walls in a detachable manner. The drive blocks 27 cooperate with the inner cavities of the corresponding first annular frame 22 and second annular frame 26.

[0042] A vent pipe 28 is connected to the outer wall of the vent cylinder 23, and a valve 29 is fixedly installed on the vent pipe 28 near the vent cylinder 23.

[0043] The bottom of the fermentation tank 101 is connected to an annular gas distribution pipe 30. One end of the annular gas distribution pipe 30 located inside the fermentation tank 101 has an air hole. The inner wall of the fermentation tank 101 is fixedly equipped with a limiting frame to improve the rotation and sliding stability of the pushing rotating column 7. It should be noted that the annular gas distribution pipe 30 is connected to an external gas supply mechanism, and the gas it inputs into the tank is a gas suitable for the growth of anaerobic bacteria (or an inert gas) for subsequent balancing of the pressure inside the tank.

[0044] Combining Embodiments 1 and 2, the core function of this equipment is to achieve efficient anaerobic fermentation of liquid manure. First, the feeding operation and the construction of the anaerobic environment must be completed. When liquid manure needs to be added to the fermentation tank 101, the feed pipe 3 is connected to the external feeding equipment, and the liquid manure to be treated is injected into the fermentation tank 101 through the feed pipe 3. After the liquid manure is added, the feed pipe 3 is immediately sealed; simultaneously, the vent pipe 28 is sealed through valve 29, and the annular air distribution pipe 30 and the sewage pipe 5 are also sealed, thereby cutting off the connection between the fermentation tank 101 and the outside air, ensuring the formation of a sealed space inside the tank, providing a basic anaerobic environment for the growth and reproduction of anaerobic bacteria.

[0045] After liquid manure is left to ferment in fermentation tank 101 for a period of time, it will produce a large amount of gas (such as carbon dioxide) under the metabolic action of anaerobic bacteria. As the gas accumulates in the tank, the pressure inside fermentation tank 101 will gradually increase, which will lead to an increase in the temperature inside the tank. The activity of anaerobic bacteria is extremely sensitive to temperature and pressure. Excessive pressure and temperature will significantly inhibit the metabolic activity of anaerobic bacteria and affect the fermentation efficiency. Therefore, intervention is required. At this time, the servo motor 16 fixedly installed on the top of the inner wall of the machine box 4 is started.

[0046] After the servo motor 16 starts, it drives the worm gear 14 connected to it to rotate synchronously, and the drive shaft 17 at the bottom of the worm gear 14 rotates together with the worm gear 14. Since the cross-section of the drive shaft 17 is polygonal and it cooperates with the slidably sleeved drive sleeve 18, the rotational torque of the drive shaft 17 can be directly transmitted to the drive sleeve 18, thereby driving the first annular frame 22 fixed on the outside of the drive sleeve 18 and the push rotating column 7 fixedly connected to the bottom of the drive sleeve 18 to rotate synchronously.

[0047] Meanwhile, during the rotation of the worm gear 14, it meshes with the worm wheel 15, causing the worm wheel 15 to rotate synchronously. The eccentric wheels 19, fixedly connected to both sides of the worm wheel 15, rotate with the worm wheel 15. Since the eccentric wheels 19 are movably connected to the pusher frame 20, the eccentric rotation of the eccentric wheels 19 is converted into the reciprocating movement of the pusher frame 20. The bottom end of the pusher frame 20 is movably connected to the deflection frame 21. Under the reciprocating drive of the pusher frame 20, the deflection frame 21 reciprocates around its rotational connection with the chassis 4. Drive blocks 27 are detachably fixed to the inner walls of both ends of the deflection frame 21. The two sets of drive blocks 27 respectively cooperate with the inner cavities of the corresponding first annular frame 22 and second annular frame 26. Therefore, the reciprocating deflection of the deflection frame 21 can synchronously drive the first annular frame 22 and the second annular frame 26 to move in a lifting and lowering manner.

[0048] Increased exhaust volume control: The second annular frame 26 moves upward under the drive of the deflector 21, and drives the slider 24, which is slidably connected inside the ventilator 23, to rise synchronously through the pull rod 25 fixedly connected at the top. The slider 24 is provided with a sealing strip on the outside. Its upward movement will increase the gas flow channel inside the ventilator 23, causing a significant increase in the amount of gas produced by fermentation in the fermentation tank 101 discharged through the vent pipe 28, thus achieving the initial release of pressure inside the fermentation tank 101. The first annular frame 22, which moves in the opposite direction to the second annular frame 26, moves downward, and drives the push rotating column 7 to move downward synchronously through the drive sleeve 18. The bottom end of the push rotating column 7 is fixedly connected to the top of the sliding sleeve 901. Therefore, the sliding sleeve 901 moves downward together with the push rotating column 7 (the sliding sleeve 901 slides against the outer wall of the center block 801 at the top of the bottom mounting bracket 8 on the inner wall of the fermentation tank 101).

[0049] The rotation of the propeller 904 is achieved by the coordinated action of the push-rotating column 7, the sliding sleeve 901, the rotating block 902, and the vertical groove. When the push-rotating column 7 rotates, it simultaneously drives the sliding sleeve 901 and the center block 801 to rotate circumferentially. The outer wall of the sliding sleeve 901 has multiple sets of vertical grooves at equal angles. The rotating block 902 is located in the vertical groove. Therefore, the circumferential rotation of the sliding sleeve 901 will generate a circumferential driving force on the rotating block 902 through the groove wall of the vertical groove, causing the rotating block 902 to deflect and the center block 801 to rotate synchronously, thereby driving the propeller 904, which is fixedly connected to the rotating block 902, to rotate synchronously. Meanwhile, the limiting block 905, which is fixed at an equal angle to the outer wall of the sliding sleeve 901, descends and rotates synchronously with the sliding sleeve 901. The side wall of the limiting block 905 is provided with a horizontal limiting groove, and the actuating rod 906 on the connecting block 903, which is fixed at one end of the rotating block 902, is slidably disposed in the horizontal limiting groove. Therefore, the descending action of the limiting block 905 will generate a thrust on the connecting block 903 through the sliding of the actuating rod 906 in the horizontal limiting groove, thereby driving the rotating block 902 to deflect at a certain angle around the rotating connection point with the center block 801 (the vertical groove provides the deflection space of the rotating block 902, avoiding interference between the deflection action and the rotation and lifting action of the sliding sleeve 901).

[0050] In summary, the paddle 904 achieves efficient mixing through a combination of rotation and deflection: On one hand, the paddle 904 rotates synchronously with the rotating block 902. Its horizontal section, away from the rotating block 902, can horizontally agitate the liquid at the bottom of the tank, while its upward-sloping section generates an upward thrust during rotation, driving the liquid at the bottom of the tank upwards. On the other hand, the deflection of the paddle 904 changes the mixing angle, expands the mixing coverage, and completely breaks the static state of the liquid near the bottom of the tank, preventing the separation of anaerobic bacteria and liquid waste at the bottom. Simultaneously, it promotes the rapid upward escape of gas generated during fermentation at the bottom of the tank, significantly improving the mixing uniformity of the materials inside the tank. Meanwhile, during the rotation of the pushing rotating column 7, multiple fixed stirring rods 10 and multiple sets of threaded blades 11 rotate synchronously on its outer side, with the stirring assembly and threaded blades 11 spaced apart. As the stirring assembly descends with the pushing rotating column 7, it agitates the liquid waste in the middle and upper sections of the fermentation tank 101, further improving the contact efficiency between the materials in the middle and upper sections and the anaerobic bacteria.

[0051] During the rotation of the threaded blades 11, an upward spiral thrust is generated, which can continuously push the liquid manure at the bottom of the fermentation tank 101 upward in a spiral motion, realizing the vertical circulation of the liquid in the tank. This works in conjunction with the stirring action of the paddle 904 to create a three-dimensional stirring flow field in the fermentation tank 101. The outer wall of the pushing rotating column 7 is also fixedly connected to an annular frame 12 through a support crossbar. The annular frame 12 rotates and rises synchronously with the pushing rotating column 7. Multiple scrapers 13 connected at equal angles on its outer side are always in contact with the inner wall of the fermentation tank 101 under the action of torsion springs. Driven by the rotation of the annular frame 12, the scrapers 13 can rotate and scrape the inner wall of the fermentation tank 101, effectively preventing liquid manure and fermentation residue from adhering to the inner wall of the tank, ensuring effective fermentation space in the tank, and reducing the loss of microbial adhesion.

[0052] When the deflector 21 deflects in the opposite direction, it drives the first annular frame 22 and the second annular frame 26 to move in opposite directions via the drive block 27: the second annular frame 26 moves downward, and drives the slider 24 to descend synchronously via the pull rod 25. During the descent of the slider 24, it will block part of the air inlet of the vent pipe 28, thereby reducing the amount of gas discharged from the fermentation tank 101 through the vent pipe 28, and avoiding excessive exhaust volume that would cause a sudden drop in pressure inside the tank. The first annular frame 22 moves upward, and drives the push rotating column 7 to rise synchronously via the drive sleeve 18, thereby driving the sliding sleeve 901, the stirring assembly, the threaded blade 11, the annular frame 12 and the scraper 13 to rise synchronously. During this process, the servo motor 16 continues to drive, so the rotation of the pusher column 7 remains unchanged, and the rotation of the paddle 904 also continues (only the rotating block 902 deflects in the opposite direction under the upward drive of the limit block 905, returning to near the initial angle). The rotation direction of the stirring assembly, the threaded blade 11, the annular frame 12 and the scraper 13 also remains unchanged, only realizing the vertical upward movement. This design effectively avoids the violent fluctuation of the liquid surface caused by the superposition of the lifting and rotating movements of the stirring assembly, ensuring the stability of the fermentation environment inside the tank.

[0053] The fermentation tank 101 in this case is a closed container. The liquid level in the top gas phase zone and the middle liquid phase zone is determined by the liquid volume and the pressure in the gas phase zone. The push-rotating column 7 immersed in the liquid and its supporting components such as the impeller 904 and the stirring rod 10 are rigid structures. When it rises and falls, it changes the space occupied by the liquid, which in turn squeezes or releases the gas in the top gas phase zone, causing pressure fluctuations and ultimately leading to a significant rise or fall in the liquid level. The push-rotating column 7 is a composite motion of "synchronous lifting and rotation". The rotation will aggravate the liquid surge, and the lifting and falling will change the volume occupied, which will cause greater disturbance to the liquid surface than a single moving stirring shaft. If the exhaust volume of the vent pipe 28 is not adjusted synchronously, problems such as liquid entrained gas leaking from the vent pipe 28 and the impact on the activity of anaerobic bacteria in the tank may occur. Therefore, it is necessary to link the lifting and falling of the push-rotating column 7 and the exhaust flow of the vent pipe 28, that is, the deflection frame 21 drives the second annular frame. When the pusher column 7 rises, the slider 24 inside the ventilator 23 rises via the pull rod 25, increasing the gas flow channel inside the ventilator 23 and simultaneously increasing the exhaust volume of the ventilator 28 (controlled by the valve 29) to achieve pressure relief. When the pusher column 7 descends, the deflector frame 21 drives the second annular frame 26 to descend in the opposite direction, which in turn drives the slider 24 to descend via the pull rod 25, reducing the gas flow channel inside the ventilator 23 and simultaneously reducing the exhaust volume of the ventilator 28 to achieve pressure maintenance. Ultimately, the change in gas volume offsets the pressure fluctuations caused by the change in volume of the pusher column 7 and its supporting components, maintaining the pressure stability of the gas phase zone inside the fermenter 101 and thus stabilizing the liquid level. This retains the advantage of the pusher column 7's "synchronous lifting and rotating" composite stirring while solving the potential liquid level disturbance problem, which is equivalent to equipping the lifting and lowering motion of the pusher column 7 with a pressure buffer.

[0054] During the reverse deflection of the deflector 21 and the upward movement of the stirring assembly, gas suitable for anaerobic bacteria is filled into the fermentation tank 101 through the annular gas distribution pipe 30. The gas is ejected through the air hole at one end of the annular gas distribution pipe 30 inside the fermentation tank 101. The ejected gas works in conjunction with the rotation of the rotor 904 to evenly diffuse into the liquid inside the tank. The rotation of the rotor 904 breaks the ejected gas into tiny bubbles, increasing the contact area between the gas and the liquid. This not only replenishes the gas atmosphere required for the anaerobic environment inside the tank, but also further balances the pressure inside the fermentation tank 101, preventing pressure fluctuations from affecting the activity of anaerobic bacteria.

[0055] The servo motor 16 runs continuously, driving the deflection frame 21 to deflect back and forth continuously, thereby driving each component to periodically complete the coordinated actions of "increased exhaust, enhanced stirring and downward movement" and "decreased exhaust, component rise, and pressure balance".

[0056] During this process, the limiting frame fixedly installed on the inner wall of the fermentation tank 101 ensures the stability of the rotation and sliding of the pushing rotating column 7, and ensures the precision of the linkage action of each component. Through the coordinated control of the above-mentioned multiple components, excess gas generated during fermentation can be effectively released, the pressure and temperature inside the tank can be balanced to ensure the activity of anaerobic bacteria, and a three-dimensional stirring flow field can be constructed through the combined rotation and deflection motion of the rotor 904, the stirring of the middle and upper sections of the stirring component, and the up and down pushing of the threaded blades 11, thereby improving the mixing efficiency of liquid sewage and anaerobic bacteria, while avoiding material adhesion to the tank wall, ultimately achieving efficient anaerobic fermentation of liquid sewage. After fermentation is completed, the fermentation residue and treated liquid can be discharged through the drain pipe 5 at the bottom of the outer side of the fermentation tank 101.

[0057] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A liquid manure anaerobic fermentation device, comprising a fermentation tank (101) and a support frame (2) disposed at the bottom outside the fermentation tank (101) for supporting it, characterized in that, The fermentation tank (101) has a top cover (102) connected to a feed pipe (3), a box (4) is set at the center of the top of the cover (102), a drain pipe (5) is connected to the bottom of the outer side of the fermentation tank (101), a sleeve (6) is fixedly connected at the center of the top of the cover (102), a push rotating column (7) is slidably connected inside the sleeve (6), the bottom of the fermentation tank (101) is conical, and an adjustment component is set in the inner cavity of the fermentation tank (101).

2. The liquid fecal anaerobic fermentation equipment according to claim 1, characterized in that, A mounting bracket (8) is fixedly connected to the center of the bottom of the inner wall of the fermentation tank (101), and a center block (801) is rotatably connected to the top of the mounting bracket (8). The steering assembly includes a sliding sleeve (901) that slides against the outer wall of the center block (801). The bottom end of the push rotating column (7) is fixedly connected to the top of the sliding sleeve (901). A rotating block (902) is rotatably connected to the outer wall of the center block (801) at an equal angle. A connecting block (903) and a propeller (904) are fixedly connected to one end of the rotating block (902).

3. The liquid fecal anaerobic fermentation equipment according to claim 2, characterized in that, The outer side wall of the sliding sleeve (901) is fixedly connected to a limiting block (905) at an equal angle. The side wall of the limiting block (905) is provided with a horizontal limiting groove. One end of the connecting block (903) is fixedly connected to a toggle rod (906) that slides in the horizontal limiting groove. The outer wall of the sliding sleeve (901) has multiple sets of vertical sliding grooves at equal angles, and the rotating block (902) is located in the vertical sliding groove.

4. The liquid fecal anaerobic fermentation equipment according to claim 1, characterized in that, Multiple sets of stirring components and multiple sets of threaded blades (11) are fixedly sleeved on the outer side of the push rotating column (7), and the stirring components and threaded blades (11) are arranged at intervals. The stirring components are composed of multiple stirring rods (10). The outer wall of the push rotating column (7) is fixedly connected to an annular frame (12) through a support crossbar. Multiple sets of scrapers (13) are rotatably connected to the outer side of the annular frame (12) at equal angles, and a torsion spring is installed at the rotational connection between the scraper (13) and the annular frame (12).

5. The liquid fecal anaerobic fermentation equipment according to claim 1, characterized in that, The inside of the chassis (4) is rotatably connected to a worm gear (14) and a worm wheel (15) via corresponding brackets. A servo motor (16) for driving the worm gear (14) to rotate is fixedly installed on the top of the inner wall of the chassis (4). A drive shaft (17) with a polygonal cross-section is rotatably connected to the bottom end of the worm gear (14). A drive sleeve (18) that slides with the drive shaft (17) is slidably connected to the outer wall of the drive shaft (17). The bottom end of the drive sleeve (18) is fixedly connected to the top end of the push rotating column (7).

6. The liquid fecal anaerobic fermentation equipment according to claim 5, characterized in that, The worm gear (15) is fixedly connected to both sides of an eccentric wheel (19), and a pusher (20) is movably connected to the outer side of the eccentric wheel (19). A deflector (21) is also rotatably connected inside the casing (4). The bottom end of the pusher (20) is movably connected to the deflector (21). A first annular frame (22) is fixedly fitted on the outer side of the drive sleeve (18). A ventilator (23) connected to the fermentation tank (101) is fixedly connected to the top of the box cover (102).

7. The liquid fecal anaerobic fermentation equipment according to claim 6, characterized in that, The ventilation cylinder (23) is internally connected to a slider (24), and a sealing strip is provided on the outside of the slider (24). A pull rod (25) is fixedly connected to the top of the slider (24). A second annular frame (26) is fixedly connected to one end of the pull rod (25) at the top of the ventilation cylinder (23). Both ends of the deflection frame (21) are fixedly installed with drive blocks (27) in a detachable manner. The drive blocks (27) are respectively matched with the inner cavities of the corresponding first annular frame (22) and second annular frame (26).

8. The liquid fecal anaerobic fermentation equipment according to claim 6, characterized in that, The outer wall of the ventilation cylinder (23) is connected to a ventilation pipe (28), and a valve (29) is fixedly installed on the ventilation pipe (28) near the ventilation cylinder (23).

9. The liquid fecal anaerobic fermentation equipment according to claim 1, characterized in that, The bottom of the fermentation tank (101) is connected to an annular gas distribution pipe (30). One end of the annular gas distribution pipe (30) located inside the fermentation tank (101) has an air hole. The inner wall of the fermentation tank (101) is fixedly equipped with a limiting frame for improving the rotation and sliding stability of the push rotating column (7).

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