Livestock and poultry manure fermentation device

Abstract

The utility model provides a kind of livestock and poultry manure fermentation device, it is related to agricultural production field.The livestock and poultry manure fermentation device includes solid-liquid separation unit and fermentation unit, solid-liquid separation unit is used to separate material by dehydrating livestock and poultry manure;The fermentation unit is used to carry out aerobic fermentation to material;The fermentation unit includes first shell, and the aeration assembly and stirring device connected with first shell, first shell has oppositely arranged top and bottom and the sidewall connecting top and bottom, top, bottom and sidewall are jointly enclosed to form first containing chamber;Stirring device is arranged in first containing chamber, at least part structure is hollow structure and forms through gas passage, and stirring device is used to scatter material and supply gas to material by gas passage;Aeration assembly is used to supply gas to material while penetrating and stirring material.By the synergistic effect of aeration assembly and stirring device, realize double-channel gas supply, and carry out efficient aerobic fermentation to material.

Description

Technical Field

[0001] This utility model relates to the field of agricultural production, and more specifically, to a livestock and poultry manure fermentation device. Background Technology

[0002] Animal husbandry plays a vital role in Chinese agriculture, serving as a fundamental industry for ensuring meat supply. Currently, the industry widely adopts "dehydrated composting" as the mainstream process for animal manure treatment. This technology primarily involves solid-liquid separation followed by partial composting, utilizing microbial action to degrade and stabilize organic matter. Traditional composting processes rely on natural ventilation and turning to achieve aerobic fermentation, requiring large areas for storage and being significantly affected by external conditions such as temperature and humidity. In actual operation, this open composting system suffers from an excessively long fermentation cycle, typically requiring 30 to 60 days to complete the maturation process. More importantly, during this lengthy composting period, a significant amount of nutrient resources are lost through volatilization in the form of ammonia and carbon dioxide, with nitrogen loss reaching up to 40% and carbon loss around 30%. This not only wastes resources but may also cause secondary pollution. This inefficient resource conversion method severely restricts the economic and environmental benefits of utilizing livestock and poultry manure resources. Utility Model Content

[0003] This invention provides a livestock and poultry manure fermentation device that, through the coordinated action of an aeration component and a stirring device, achieves dual-channel gas supply for efficient aerobic fermentation of materials dehydrated by a solid-liquid separation unit. This device significantly enhances the aeration and uniform mixing of the materials, effectively shortens the fermentation cycle, and improves fermentation efficiency.

[0004] The embodiments of this utility model can be implemented as follows: A livestock and poultry manure fermentation device includes a solid-liquid separation unit and a fermentation unit. The solid-liquid separation unit is used to dehydrate the livestock and poultry manure to separate the material. The feed end of the fermentation unit is connected to the discharge end of the solid-liquid separation unit for aerobic fermentation of the material. The fermentation unit includes a first shell, an aeration assembly and a stirring device connected to the first shell. The first shell has a top and a bottom disposed opposite to each other and a side wall connecting the top and the bottom. The top, the bottom and the side wall together enclose a first receiving chamber. The stirring device is disposed in the first receiving chamber, and at least part of its structure is hollow and forms a through gas channel. The stirring device is used to disperse the material located in the first receiving chamber and supply gas to the material through the gas channel. The aeration component is disposed in the first receiving chamber near the bottom and is fixedly connected to the inner surface of the side wall, for supplying air to the material while penetrating and agitating the material located at the bottom of the first receiving chamber.

[0005] Optionally, the fermentation unit further includes an air intake device connected to the side wall, wherein, The aeration assembly includes multiple interconnected ventilation ducts that are connected to the air intake device. The ventilation ducts are located in the first receiving chamber near the bottom and are fixedly connected to the inner surface of the side wall. They are used to supply air to the material while penetrating and agitating it at the bottom of the first receiving chamber.

[0006] Optionally, the ventilation duct is provided with a plurality of first through holes at intervals.

[0007] Optionally, the ventilation duct is meandering.

[0008] Optionally, the stirring device includes a stirring element, which comprises a hollow cylindrical stirring shaft and blades fixedly connected to the outer periphery of the stirring shaft, wherein... The stirring shaft has a first channel, and the stirring shaft has a plurality of second through holes communicating with the first channel. Gas is supplied to the material by supplying gas to the first channel and the second through holes.

[0009] Optionally, the solid-liquid separation unit includes a second housing, a feed hopper, a screw extruder, and a drive component. The second housing forms a second receiving chamber. The feed hopper communicates with the second receiving chamber and is used to introduce livestock and poultry manure into the second receiving chamber. The screw extruder is disposed within the second receiving chamber and connected to the second housing. The drive component is connected to the screw extruder and is used to drive the screw extruder to rotate. The second housing forms a liquid collection chamber on the inner wall of the side away from the feed hopper, and a screen is provided between the spiral extrusion rod and the liquid collection chamber, and the screen is fixedly connected to the second housing.

[0010] Optionally, the spiral extrusion rod has a feeding section, a compression section, and an extrusion section connected in sequence, wherein, The feed section has a screw pitch of 15 cm, the compression section has a screw pitch of 10 cm, and the extrusion section has a screw pitch of 8 cm.

[0011] Optionally, the livestock and poultry manure fermentation device further includes a deodorization unit. The first shell has a gas outlet that communicates with the first receiving chamber. The deodorization unit is connected to the gas outlet and is used to purify and deodorize the biogas during the fermentation process.

[0012] Optionally, the deodorization unit includes a spray circulation system and a filter layer, wherein the filter layer has, in the vertical direction, a coconut shell activated carbon layer, a volcanic rock layer and a bio-ceramic particle layer.

[0013] Optionally, the livestock and poultry manure fermentation device further includes a deodorization unit and an intelligent control unit. The deodorization unit is connected to the fermentation unit, and the intelligent control unit is electrically connected to the solid-liquid separation unit, the fermentation unit, and the deodorization unit. It is used to monitor the temperature, humidity, and oxygen concentration of each unit and to optimize and adjust the unit based on the monitored temperature, humidity, and oxygen concentration parameters.

[0014] The beneficial effects of the livestock and poultry manure fermentation device according to this utility model embodiment include: By pre-dehydrating livestock and poultry manure through a solid-liquid separation unit, the moisture content of the material is effectively reduced, improving the stability and efficiency of the subsequent fermentation process. The dehydrated material then enters the fermentation unit, where it undergoes efficient biodegradation under aerobic conditions. The aeration component, located near the bottom of the first receiving chamber and fixedly connected to the inner surface of the side wall, continuously releases airflow into the bottom material area. This achieves localized oxygenation of the bottom material while generating upward airflow and mechanical agitation, preventing bottom sludge caking and promoting loosening and reactivation of the bottom material. Gas channels in the mixing device allow gas to be delivered into the material pile, enabling simultaneous direct gas supply during mixing and dispersing. This precise injection of oxygen into the material significantly improves upon the difficulty of penetration associated with traditional surface aeration.

[0015] The aeration components and stirring devices work together to form a dual-channel air supply system. Through complementary and coordinated spatial layout, a dynamic and uniform oxygen supply mechanism is formed, which effectively shortens the fermentation cycle and improves fermentation efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the livestock and poultry manure fermentation device provided in this embodiment; Figure 2 This is a schematic diagram of the solid-liquid separation unit provided in this embodiment from a first-view perspective; Figure 3This is a schematic diagram of the fermentation unit provided in this embodiment from a first-view perspective; Figure 4 This is a schematic diagram of the deodorization unit provided in this embodiment from a first-view perspective.

[0018] Icons: 1-Livestock manure fermentation device; 10-Solid-liquid separation unit; 11-Second shell; 12-Second receiving chamber; 13-Liquid collection bin; 14-Feed hopper; 15-Screw; 16-Screw extruder; 161-Feeding section; 162-Compression section; 163-Extrusion section; 17-Drive component; 20-Fermentation unit; 21-First shell; 21a-Top; 21b-Bottom; 21c-Side wall; 22-First receiving chamber; 23-Aeration assembly; 231-Ventilation duct; 2 311-First through hole; 25-Stirring device; 27-First driving component; 253-Stirring component; 2531-Stirring shaft; 2532-First channel; 2534-Blade; 26-Air intake device; 261-Centrifugal fan; 30-Deodorization unit; 31-Spray circulation system; 311-Water tank; 312-Circulation pump; 313-Atomizing nozzle; 33-Filter layer; 331-Coconut shell activated carbon sublayer; 332-Volcanic rock sublayer; 333-Bio-ceramic particle layer; 40-Intelligent control unit. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Also, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] It should also be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0026] As described in the background section, traditional composting processes have excessively long fermentation cycles and low resource conversion efficiency, which severely restricts the economic benefits of utilizing livestock and poultry manure resources.

[0027] Please refer to Figure 1 This application provides a livestock and poultry manure fermentation device 1, which can solve the above-mentioned technical problems.

[0028] The livestock and poultry manure fermentation device 1 includes a solid-liquid separation unit 10 and a fermentation unit 20. The solid-liquid separation unit 10 is used to dehydrate the livestock and poultry manure to separate the material. The feed end of the fermentation unit 20 is connected to the discharge end of the solid-liquid separation unit 10 and is used to perform aerobic fermentation on the material. The fermentation unit 20 includes a first shell 21, an aeration assembly 23 connected to the first shell 21, and a stirring device 25. The first shell 21 has a top 21a and a bottom 21b arranged opposite to each other, and a side wall 21c connecting the top 21a and the bottom 21b. The first receiving chamber 22 is formed by the enclosure of part 21b and side wall 21c. The stirring device 25 is disposed in the first receiving chamber 22, and at least part of its structure is hollow and forms a through gas channel. The stirring device 25 is used to disperse the material located in the first receiving chamber 22 and supply air to the material through the gas channel. The aeration component 23 is disposed in the first receiving chamber 22 near the bottom 21b and is fixedly connected to the inner surface of the side wall 21c. It is used to supply air to the material while penetrating and stirring the material located at the bottom 21b of the first receiving chamber 22.

[0029] By setting up a solid-liquid separation unit 10 to pre-dehydrate livestock and poultry manure, the moisture content of the material is effectively reduced, improving the stability and efficiency of the subsequent fermentation process. The dehydrated material enters the fermentation unit 20, where it undergoes efficient biodegradation under aerobic conditions. The aeration components 23 and the stirring device 25 work together to construct a dual-channel air supply system, forming a dynamic and uniform oxygen supply mechanism through complementary spatial layout.

[0030] Specifically, the aeration component 23 is positioned near the bottom 21b of the first receiving chamber 22 and is fixedly connected to the inner surface of the side wall 21c. During continuous operation, it releases airflow into the material area at the bottom 21b, achieving localized oxygenation of the bottom material while generating upward turbulent airflow and mechanical agitation, preventing bottom slag caking and promoting loosening and reactivation of the bottom material. The gas channel in the stirring device 25 allows gas to be transported into the material pile, enabling simultaneous direct gas supply to the material during stirring and dispersing, precisely injecting oxygen into the material, and greatly improving the problem of poor penetration in traditional surface aeration.

[0031] In this embodiment, please refer to Figure 3The stirring device 25 includes a stirring element 253, which comprises a hollow cylindrical stirring shaft 2531 and blades 2534 fixedly connected to the outer periphery of the stirring shaft 2531. The stirring shaft 2531 forms a first channel 2532 and has multiple second through holes (not shown) communicating with the first channel 2532. Gas is supplied to the material by supplying gas to the first channel 2532 and the second through holes. Under the action of the first driving element 27, the stirring shaft 2531, in conjunction with the blades 2534, effectively disperses the material located in the first receiving chamber 22. Continuous gas injection maintains the loose state of the material, preventing it from caking due to lack of oxygen. This not only improves the stability of the fermentation process but also reduces the workload of equipment maintenance and cleaning.

[0032] It should be noted that the first channel 2532 and the connected second through hole together constitute the gas channel mentioned above. This channel supplies gas to the material through a hole in the hollow stirring shaft 2531. In other embodiments, the gas supply method can be flexibly adjusted. The blade 2534 can be designed as a hollow structure with holes for gas supply, or holes can be opened on both the stirring shaft 2531 and the blade 2534 to form a combined gas supply structure.

[0033] In addition to providing gas channels to the material via the stirring device 25, an aeration assembly 23 is also provided on the side wall 21c to supply gas to the material from the area near the bottom 21b of the device. Specifically, the fermentation unit 20 also includes an air inlet device 26 connected to the side wall 21c. The aeration assembly 23 includes multiple interconnected ventilation pipes 231 connected to the air inlet device 26. The ventilation pipes 231 are located in the first receiving chamber 22 near the bottom 21b and are fixedly connected to the inner surface of the side wall 21c. They are used to supply gas to the material while penetrating and agitating the material located at the bottom 21b of the first receiving chamber 22.

[0034] During operation, the aeration component 23 not only provides gas but also promotes thorough mixing of the materials while penetrating and agitating them at the bottom 21b of the first receiving chamber 22. This dual function helps accelerate the chemical reaction rate during fermentation, thereby improving fermentation efficiency.

[0035] In this embodiment, the air intake device 26 is a centrifugal fan 261. The centrifugal fan 261 is fixedly connected to the side wall 21c through a pipe, providing an air source for multiple ventilation ducts 231.

[0036] It is readily understood that the gas supplied to the material by the stirring device 25 and the aeration assembly 23 can carry a certain temperature, which facilitates the fermentation of the material. In other embodiments, a heating device may also be installed on the first housing 21 to provide a suitable reaction temperature for the material in the first receiving chamber 22.

[0037] Optionally, a plurality of first through holes 2311 are provided at intervals on the ventilation duct 231. Similar to the function of the second through holes, the first through holes 2311 provided at intervals on the ventilation duct 231 communicate with the interior of the ventilation duct 231 to form an air passage. By supplying air to the air passage, the material located at the bottom 21b of the first receiving chamber 22 is penetrated and agitated.

[0038] In this embodiment, the ventilation duct 231 is meandering to increase the contact area between the gas and the material, allowing for more thorough mixing. The meandering duct generates more turbulence during gas supply, which more effectively penetrates and agitates the material located at the bottom 21b of the first receiving chamber 22. This not only promotes uniform mixing of the material but also improves mass transfer efficiency and accelerates the chemical reaction rate during fermentation.

[0039] Further, please refer to Figure 2 To dehydrate the livestock and poultry manure entering the device and improve the stability and efficiency of the subsequent fermentation process, the solid-liquid separation unit 10 includes a second housing 11, a feed hopper 14, a screw extrusion rod 16, and a drive unit 17. The second housing 11 forms a second receiving chamber 12. The feed hopper 14 is connected to the second receiving chamber 12 and is used to introduce livestock and poultry manure into the second receiving chamber 12. The screw extrusion rod 16 is disposed in the second receiving chamber 12 and connected to the second housing 11. The drive unit 17 is connected to the screw extrusion rod 16 and is used to drive the screw extrusion rod 16 to rotate. A liquid collection chamber 13 is formed on the inner wall of the second housing 11 on the side away from the feed hopper 14. A screen 15 is disposed between the screw extrusion rod 16 and the liquid collection chamber 13, and the screen 15 is fixedly connected to the second housing 11.

[0040] During operation, the spiral extrusion rod 16 rotates under the drive of the drive component 17, which can forcefully compress the livestock and poultry manure entering the second receiving chamber 12. The design of the screen 15 allows liquid to flow into the liquid collection chamber 13 through its sieve holes, while solid matter is blocked and continues to be compressed. This structure effectively achieves solid-liquid separation and improves separation efficiency.

[0041] Optionally, to further improve solid-liquid separation efficiency, the screw extruder 16 has a feeding section 161, a compression section 162, and an extrusion section 163 connected in sequence. The feed section 161 has a pitch of 15 cm, the compression section 162 has a pitch of 10 cm, and the extrusion section 163 has a pitch of 8 cm. The larger pitch of the feed section 161 allows the material to be smoothly introduced into the second receiving chamber 12, reducing feeding resistance and ensuring uniform material distribution and smooth entry into subsequent processing stages. The reduced pitch of the compression section 162 increases the compression force on the material, initiating preliminary extrusion and dehydration, and gradually increasing the material pressure in preparation for final extrusion. The extrusion section 163, located at the end of the screw extruder 16, has a further reduced pitch, subjecting the material to maximum pressure, thereby achieving efficient solid-liquid separation and ensuring that the liquid in the material is fully squeezed out and the solid matter is effectively compressed.

[0042] Optionally, the livestock and poultry manure fermentation device 1 also includes a deodorization unit 30. A gas outlet communicating with the first receiving chamber 22 is provided on the first housing 21. The deodorization unit 30 is connected to the gas outlet and is used to purify and deodorize the biogas produced during the fermentation process. The deodorization unit 30 can not only remove malodorous gases but also further purify the biogas to achieve a higher purity. The purified biogas can be used as a clean energy source, such as for power generation or heating, thereby improving the comprehensive utilization efficiency of resources and reducing energy costs.

[0043] Alternatively, please refer to Figure 4 The deodorization unit 30 includes a spray circulation system 31 and a filter layer 33. The filter layer 33, vertically arranged, comprises a coconut shell activated carbon sublayer 331, a volcanic rock sublayer 332, and a bio-ceramic particle layer 333. During the biogas deodorization and filtration process, a multi-layered purification mechanism is formed through the physical adsorption of the coconut shell activated carbon sublayer 331, the chemical adsorption of the volcanic rock sublayer 332, and the biodegradation of the bio-ceramic particle layer 333. This multi-layered treatment method can more comprehensively remove various malodorous gases and harmful substances, improving the biogas purification effect.

[0044] In this embodiment, the spray circulation system 31 consists of a water tank 311, a circulation pump 312, and an atomizing nozzle 313 connected in sequence. The purified liquid is sprayed down from above the filter layer 33 through the atomizing nozzle 313, and works in conjunction with the filter layer 33 to fully contact the gas to be purified, directly adsorbing and dissolving soluble impurities in the gas or tiny pollutants on the surface of the material, thus compensating for the shortcomings of the filter layer 33 in relying solely on physical interception.

[0045] Optionally, to improve the stability and reliability of the system, the livestock and poultry manure fermentation device 1 also includes a deodorization unit 30 and an intelligent control unit 40. The deodorization unit 30 is connected to the fermentation unit 20, and the intelligent control unit 40 is electrically connected to the solid-liquid separation unit 10, the fermentation unit 20, and the deodorization unit 30. It is used to monitor the temperature, humidity, and oxygen concentration of each unit and to optimize and adjust the system based on the monitored parameters. Real-time monitoring and optimization ensure that the fermentation process is always in optimal condition, improving the activity and metabolic rate of microorganisms, thereby accelerating the fermentation process and increasing fermentation efficiency. This not only shortens the fermentation cycle but also improves the quality and yield of the final product.

[0046] The working principle of the livestock and poultry manure fermentation device 1 provided in this embodiment is as follows: 1. Solid-liquid separation: The livestock and poultry manure entering the device first enters the solid-liquid separation unit 10, where the moisture content of the material is controlled within a specific preset range through dehydration treatment, in preparation for subsequent fermentation; 2. Fermentation: The dehydrated material enters the fermentation unit 20 for efficient biodegradation. An aeration component 23 is installed at the bottom 21b of the first containment chamber 22 of the fermentation unit 20. The aeration component 23 continuously releases airflow into the material area at the bottom 21b, achieving localized oxygenation and generating upward turbulent airflow and mechanical agitation. The gas channel in the stirring device 25 allows gas to be directly delivered into the material pile, simultaneously supplying gas during the stirring and dispersing process, precisely injecting oxygen into the material, improving the activity and metabolic rate of microorganisms, and accelerating the fermentation process. 3. Gas deodorization: The gas produced during fermentation enters the deodorization unit 30, and through the physical adsorption of the coconut shell activated carbon sublayer 331, the chemical adsorption of the volcanic rock sublayer 332, and the biodegradation of the bioceramic particle layer 333, a multi-stage purification mechanism is formed to comprehensively remove various malodorous gases and harmful substances and improve the purification effect of biogas. 4. Intelligent Control, Detection, and Optimization: Each unit is electrically connected to the intelligent control unit 40. The intelligent control unit 40 monitors and optimizes the temperature, humidity, and oxygen concentration during the fermentation process in real time, ensuring that the entire system is always in optimal condition, thereby improving fermentation efficiency and product quality.

[0047] Through this series of steps, the livestock and poultry manure fermentation device 1 achieves efficient organic matter decomposition, resource recycling, and environmentally friendly treatment.

[0048] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A livestock and poultry manure fermentation device, characterized in that, include: Solid-liquid separation unit (10) is used to dehydrate livestock and poultry manure to separate the material; A fermentation unit (20) is provided, with its feed end connected to the discharge end of the solid-liquid separation unit (10), for aerobic fermentation of the material; wherein, The fermentation unit (20) includes a first shell (21), an aeration assembly (23) connected to the first shell (21), and a stirring device (25). The first shell (21) has a top (21a) and a bottom (21b) arranged opposite to each other, and a side wall (21c) connecting the top (21a) and the bottom (21b). The top (21a), the bottom (21b), and the side wall (21c) together enclose a first receiving chamber (22). The stirring device (25) is disposed in the first receiving chamber (22), and at least part of its structure is hollow and forms a through gas channel. The stirring device (25) is used to disperse the material located in the first receiving chamber (22) and supply gas to the material through the gas channel. The aeration component (23) is disposed in the first receiving chamber (22) near the bottom (21b) and is fixedly connected to the inner surface of the side wall (21c) to supply air to the material while penetrating and agitating the material located at the bottom (21b) of the first receiving chamber (22).

2. The livestock and poultry manure fermentation device according to claim 1, characterized in that, The fermentation unit (20) further includes an air intake device (26), which is connected to the side wall (21c), wherein, The aeration assembly (23) includes multiple interconnected ventilation ducts (231), which are connected to the air intake device (26). The ventilation ducts (231) are located in the first receiving chamber (22) near the bottom (21b) and are fixedly connected to the inner surface of the side wall (21c). They are used to supply air to the material while penetrating and agitating the material located at the bottom (21b) of the first receiving chamber (22).

3. The livestock and poultry manure fermentation device according to claim 2, characterized in that, The ventilation duct (231) is provided with a plurality of first through holes (2311) at intervals.

4. The livestock and poultry manure fermentation device according to claim 2, characterized in that, The ventilation duct (231) is meandering.

5. The livestock and poultry manure fermentation device according to claim 1, characterized in that, The stirring device (25) includes a stirring element (253), which includes a hollow cylindrical stirring shaft (2531) and blades (2534) fixedly connected to the outer periphery of the stirring shaft (2531). The stirring shaft (2531) has a first channel (2532), and the stirring shaft (2531) has a plurality of second through holes communicating with the first channel (2532). Gas is supplied to the material by supplying gas to the first channel (2532) and the second through holes.

6. The livestock and poultry manure fermentation device according to claim 1, characterized in that, The solid-liquid separation unit (10) includes: The second housing (11) forms a second receiving chamber (12); Feed hopper (14), which is connected to the second receiving chamber (12), is used to introduce livestock and poultry manure into the second receiving chamber (12). A spiral extrusion rod (16) is disposed in the second receiving chamber (12) and connected to the second housing (11); A driving component (17) is connected to the spiral extrusion rod (16) and is used to drive the spiral extrusion rod (16) to rotate; wherein, The second housing (11) forms a liquid collection chamber (13) on the inner wall of the side away from the feed hopper (14). A screen (15) is provided between the spiral extrusion rod (16) and the liquid collection chamber (13), and the screen (15) is fixedly connected to the second housing (11).

7. The livestock and poultry manure fermentation device according to claim 6, characterized in that, The spiral extrusion rod (16) has a feeding section (161), a compression section (162), and an extrusion section (163) connected in sequence, wherein, The feed section (161) has a pitch of 15 cm, the compression section (162) has a pitch of 10 cm, and the extrusion section (163) has a pitch of 8 cm.

8. The livestock and poultry manure fermentation device according to claim 1, characterized in that, The livestock and poultry manure fermentation device (1) also includes a deodorization unit (30). The first shell (21) has a gas outlet that communicates with the first accommodating chamber (22). The deodorization unit (30) is connected to the gas outlet and is used to purify and deodorize the biogas during the fermentation process.

9. The livestock and poultry manure fermentation device according to claim 8, characterized in that, The deodorization unit (30) includes a spray circulation system (31) and a filter layer (33). The filter layer (33) has a coconut shell activated carbon sublayer (331), a volcanic rock sublayer (332), and a bio-ceramic particle layer (333) in the vertical direction.

10. The livestock and poultry manure fermentation device according to claim 1, characterized in that, The livestock and poultry manure fermentation device (1) also includes a deodorization unit (30) and an intelligent control unit (40). The deodorization unit (30) is connected to the fermentation unit (20), and the intelligent control unit (40) is electrically connected to the solid-liquid separation unit (10), the fermentation unit (20), and the deodorization unit (30). It is used to monitor the temperature, humidity, and oxygen concentration of each unit and to optimize and adjust the unit based on the monitored temperature, humidity, and oxygen concentration parameters.

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