Agricultural waste purification device

Abstract

The invention discloses an agricultural waste purification device, and relates to the technical field of agricultural waste purification, the device comprises a fermentation tank body, the bottom of the fermentation tank body is fixedly connected with a discharge shell, the interior of the discharge shell is rotatably connected with a discharge auger, and the bottom of the fermentation tank body and the top of the discharge shell are slidably connected with a partition plate; a uniform assembly for improving the fermentation uniformity of the agricultural wastes is arranged in the fermentation tank body, and an auxiliary assembly for improving the overall utilization rate of raw materials is arranged in the fermentation tank body; the triangular scraping plate is driven to move up and down while stirring is conducted in the fermentation tank body, so that sticky substances on the inner wall of the fermentation tank body are reduced, materials can be further pushed and mixed in the process that the triangular scraping plate moves up and down close to the inner wall of the fermentation tank body, and stirring is more uniform; when the discharging auger is used for discharging, sticky residues can be scraped off and sent out through the scraping action of the triangular scraping plate, and it is guaranteed that no raw material is wasted.

Description

Technical Field

[0001] This invention relates to the field of agricultural waste purification technology, specifically to an agricultural waste purification device. Background Technology

[0002] Agricultural waste is a general term for waste generated from agricultural production, agricultural product processing, livestock and poultry farming, and rural residents' daily lives. Among these, crop straw from agricultural production can be used to produce biogas and become agricultural organic fertilizer. It also serves as roughage for livestock and bedding. By mixing poultry and livestock manure and bedding, or by mixing chopped straw with an appropriate amount of human and animal excrement for high-temperature composting, and after a short period of fermentation, a large number of pathogenic bacteria and parasite eggs in human and animal excrement, as well as plant pests and various weed seeds hidden in the straw, can be killed. During the fermentation process, biogas is produced. Through fermentation purification technology, agricultural waste can be effectively treated and transformed into useful resources. Agricultural fertilizer with straw as the main component can provide both biogas fuel and high-quality organic fertilizer, and therefore it is widely used in rural China.

[0003] Existing technology CN114195568A discloses a fermentation tank for agricultural waste composting, including a fermentation tank body. A rotating shaft is rotatably mounted inside the fermentation tank body, and stirring blades are fixedly mounted on the surface of the rotating shaft. A discharge auger is rotatably mounted at the bottom of the fermentation tank body. This device uses multiple layers of stirring blades to agitate the raw materials, facilitating fermentation. However, the multiple layers of stirring blades not only occupy space inside the fermentation tank, but also the fixed stirring range of each blade affects the distribution and flow of materials within the fermentation tank. Because the stirring range of each layer of stirring blades is fixed, the materials within the fermentation tank are not evenly mixed. Some areas are over-mixed, while others are under-mixed and fermentation is insufficient. Secondly, the device discharges the fermented raw materials into fertilizer through a auger. However, the raw materials produce a large amount of water and oil during fermentation, making them sticky. As a result, they adhere to or accumulate on the inner wall of the fermentation tank. This adhesion not only affects the auger's discharge but also leads to uneven mixing. Uneven mixing affects the distribution and activity of microorganisms in the material, thus affecting the fermentation rate and product quality. Due to the adhesion, some raw materials cannot be completely discharged by the auger, resulting in excessive residual material in the fermentation tank. This residual material not only affects the fermentation effect of the next batch but also wastes resources.

[0004] Therefore, this invention proposes an agricultural waste purification device to improve upon the shortcomings of traditional technologies. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an agricultural waste purification device that solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an agricultural waste purification device, comprising a fermentation tank body, a discharge shell fixedly connected to the bottom of the fermentation tank body, a discharge auger rotatably connected inside the discharge shell, a partition plate slidably connected between the bottom of the fermentation tank body and the top of the discharge shell, a uniform component for improving the uniformity of agricultural waste fermentation provided inside the fermentation tank body, and an auxiliary component for improving the overall utilization rate of raw materials provided inside the fermentation tank body.

[0007] Preferably, the uniform component includes an auxiliary cylinder, the bottom of which is rotatably connected to the top of the fermentation tank body. A threaded column is movably connected inside the auxiliary cylinder, the threaded column penetrates the top of the fermentation tank body and is threadedly connected thereto. A vertical groove is formed on the outer surface of the auxiliary cylinder, and a first cylinder is slidably connected inside the vertical groove. The outer surface of the first cylinder is fixedly connected to the top of the threaded column.

[0008] Preferably, a long stirring rod and a short stirring rod are fixedly connected to the outer surface of one end of the threaded column located inside the fermentation tank body. A filter cylinder is fixedly connected to the end of the long stirring rod and the short stirring rod away from the threaded column. A second cylinder is fixedly connected to the inner wall of the filter cylinder. A rotating plate is rotatably connected to the outer surface of the second cylinder. A baffle plate is fixedly connected to the bottom of the inner wall of the filter cylinder.

[0009] Preferably, the long stirring rod and the short stirring rod are arranged in a circumferential array on the outer surface of the threaded column.

[0010] Preferably, the auxiliary component includes a circular column surrounding the outer surface of the auxiliary cylinder. The inner wall of the circular column has a circular groove, and a circular plate is slidably connected inside the circular groove. The inner wall of the circular plate is fixedly connected to the end of the first cylinder away from the auxiliary cylinder.

[0011] Preferably, an auxiliary cylinder is fixedly connected to the outer surface of the annular column. The auxiliary cylinder consists of a parallel section and a vertical section. The parallel section of the auxiliary cylinder is fixedly connected to the outer surface of the annular column, and the vertical section of the auxiliary cylinder is slidably connected to the top of the fermentation tank body.

[0012] Preferably, a square plate is fixedly connected to one end of the auxiliary cylinder inside the fermentation tank body. A cylindrical groove is formed on the inner wall of the square plate. A return spring is fixedly connected inside the cylindrical groove. A third cylinder is fixedly connected to the end of the return spring away from the square plate. A triangular scraper is fixedly connected to the end of the third cylinder away from the return spring.

[0013] Preferably, the cylindrical groove, the reset spring, the third cylinder, and the triangular scraper are all arranged in a circumferential array on the outside of the square plate, and the size of the square plate is adapted to the inner wall size of the fermentation tank body.

[0014] The agricultural waste purification device provided by this invention has the following beneficial effects:

[0015] 1. By using the auxiliary cylinder, the threaded column, and the first cylinder in combination, the threaded column drives the long and short stirring rods to move up and down inside the fermentation tank while simultaneously rotating and stirring. Compared to setting up multiple layers of fixed stirring, the design of the long and short stirring rods rotating up and down can reduce the number of stirring components, thereby reducing the space occupied. When the long and short stirring rods rotate up and down in the fermentation tank, they can effectively mix the gas with the fermenting material, allowing oxygen to diffuse into the fermenting material more quickly. This dynamic stirring method promotes more uniform gas distribution than fixed stirring, thereby improving fermentation efficiency.

[0016] 2. Through the coordinated use of auxiliary components, the triangular scraper moves up and down while stirring the fermentation tank, reducing the amount of adhesive material on the inner wall of the tank. As the triangular scraper moves up and down against the inner wall, it further pushes and mixes the materials, making the stirring more uniform. Secondly, while the discharge auger is discharging the material, the scraping action of the triangular scraper removes and sends away any remaining adhesive residue, ensuring no raw material waste and thus improving the overall utilization rate of raw materials, reducing production costs. Removing residue prevents it from affecting subsequent fermentation processes, ensuring the uniformity and consistency of the fermented product, thereby improving the quality of the final product. The use of a return spring maintains close contact and pressure between the triangular scraper and the inner wall of the fermentation tank, enabling it to effectively scrape away adhesive material and reduce the amount of residue. The return spring design allows the triangular scraper to maintain a certain degree of elasticity when scraping adhesive material, reducing direct friction with the inner wall and thus reducing wear on the inner wall.

[0017] 3. By using the filter cylinder, the second cylinder, the rotating plate, and the baffle plate in combination, the spiral column rotates and stirs the filter cylinder, which then rotates inside the fermentation tank to filter large pieces of manure. When the filter cylinder rotates clockwise, the fermented material can squeeze the rotating plate into the filter cylinder, thus separating large pieces of manure and preventing them from falling into the discharge auger and getting stuck. When it rotates counterclockwise, the fermented material pushes the rotating plate, which is blocked by the baffle plate, making it difficult for the filtered material to leak out. This design ensures the stability and reliability of the filtration process. By alternating clockwise and counterclockwise rotation of the spiral column, continuous filtration and separation of the fermented material can be achieved, thereby improving filtration efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a three-dimensional bottom view of the overall structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the overall internal structure of the present invention;

[0021] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0022] Figure 5 This is a schematic diagram of the uniform component structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the filter cartridge structure of the present invention;

[0024] Figure 7 This is a partial structural diagram of the auxiliary component of the present invention;

[0025] Figure 8 This is a schematic diagram of the position structure of the reset spring of the present invention.

[0026] The labels in the diagram represent:

[0027] 1. Fermentation tank body; 2. Discharge shell; 3. Discharge auger; 4. Divider plate;

[0028] 5. Uniform assembly; 51. Auxiliary cylinder; 52. Threaded column; 53. First cylinder; 54. Long stirring rod; 55. Short stirring rod; 56. Filter cylinder; 57. Second cylinder; 58. Rotating plate; 59. Baffle plate; 510. Vertical groove;

[0029] 6. Auxiliary components; 61. Circular column; 62. Circular plate; 63. Auxiliary column; 64. Square plate; 65. Circular groove; 66. Return spring; 67. Third column; 68. Triangular scraper. Detailed Implementation

[0030] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] refer to Figures 1 to 8 As shown, a preferred embodiment of the present invention will be described in detail below:

[0032] An agricultural waste purification device includes a fermentation tank body 1, a discharge shell 2 fixedly connected to the bottom of the fermentation tank body 1, a discharge auger 3 rotatably connected inside the discharge shell 2, a partition plate 4 slidably connected between the bottom of the fermentation tank body 1 and the top of the discharge shell 2, a uniform component 5 for improving the uniformity of agricultural waste fermentation, and an auxiliary component 6 for improving the overall utilization rate of raw materials.

[0033] The homogenizing component 5 includes an auxiliary cylinder 51, with a driving device fixedly connected to the top of the auxiliary cylinder 51 and a bottom rotatably connected to the top of the fermentation tank body 1. A threaded column 52 is movably connected inside the auxiliary cylinder 51, penetrating the top of the fermentation tank body 1 and threadedly connected thereto. A vertical groove 510 is formed on the outer surface of the auxiliary cylinder 51, and a first cylinder 53 is slidably connected inside the vertical groove 510. The outer surface of the first cylinder 53 is fixedly connected to the top of the threaded column 52. When the long stirring rod 54 and the short stirring rod 55 are of different lengths and are stirred in the same layer, a more complex flow field can be formed. The long stirring rod 54 can reach a farther area, while the short stirring rod 55 can generate stronger shear force at close range. This combination allows agricultural waste to be uniformly mixed over a larger area, reducing the mixing blind zone. Through the coordinated use of the auxiliary cylinder 51, the threaded column 52, and the first cylinder 53, the threaded column 52 drives the long stirring rod 54 and the short stirring rod 55 to move up and down inside the fermentation tank body 1 while rotating and stirring.

[0034] A long stirring rod 54 and a short stirring rod 55 are fixedly connected to the outer surface of one end of the threaded column 52 located inside the fermentation tank body 1. A filter cylinder 56 is fixedly connected to the ends of the long stirring rod 54 and the short stirring rod 55 away from the threaded column 52. A second cylinder 57 is fixedly connected to the inner wall of the filter cylinder 56. A rotating plate 58 is rotatably connected to the outer surface of the second cylinder 57. A baffle plate 59 is fixedly connected to the bottom of the inner wall of the filter cylinder 56. The baffle plate 59 is located on the side of the rotating plate 58 closest to the opening of the filter cylinder 56. In this way, when the filter cylinder 56 rotates counterclockwise, the baffle plate 59 blocks the rotating plate 58, preventing it from rotating outwards from the filter cylinder 56. The long stirring rod 54 and the short stirring rod 55 are arranged in a circumferential array on the outer surface of the threaded column 52. Through the coordinated use of the filter cylinder 56, the second cylinder 57, the rotating plate 58 and the baffle plate 59, the threaded column 52 rotates and stirs while driving the filter cylinder 56 to rotate inside the fermentation tank body 1 to filter large pieces of feces. When the filter cylinder 56 rotates clockwise, the fermented material can squeeze the rotating plate 58 into the filter cylinder 56, thereby achieving the separation of large pieces of feces and preventing them from falling into the discharge auger 3 and getting stuck during discharge. When it rotates counterclockwise, the fermented material pushes the rotating plate 58 and is blocked by the baffle plate 59, making it difficult for the filtered material to leak out.

[0035] Compared with existing technologies, this device can reduce the number of stirring components, thereby reducing the space occupied. It can effectively mix the gas with the fermentation material, allowing oxygen to diffuse into the fermentation material more quickly. This dynamic stirring method promotes more uniform gas distribution than fixed stirring, thereby improving fermentation efficiency. Secondly, continuous filtration and separation of the fermentation material can be achieved during the stirring process, thereby improving filtration efficiency.

[0036] The auxiliary component 6 includes a circular ring column 61, which surrounds the outer surface of the auxiliary cylinder 51. A circular groove is formed on the inner wall of the circular ring column 61. A circular ring plate 62 is slidably connected inside the circular groove of the circular ring column 61. The inner wall of the circular ring plate 62 is fixedly connected to the end of the first cylinder 53 away from the auxiliary cylinder 51. An auxiliary cylinder 63 is fixedly connected to the outer surface of the circular ring column 61. The auxiliary cylinder 63 consists of a parallel section and a vertical section. The parallel section of the auxiliary cylinder 63 is fixedly connected to the outer surface of the circular ring column 61. The vertical section of the auxiliary cylinder 63 is slidably connected to the top of the fermentation tank body 1. Through the coordinated use of the circular ring column 61, the circular ring plate 62 and the auxiliary cylinder 63, the rotation of the first cylinder 53 does not drive the rotation of the circular ring column 61, and the up and down movement of the first cylinder 53 drives the up and down movement of the circular ring column 61.

[0037] An auxiliary cylinder 63 is fixedly connected to a square plate 64 at one end inside the fermentation tank body 1. A cylindrical groove 65 is formed on the inner wall of the square plate 64. A return spring 66 is fixedly connected inside the cylindrical groove 65. A third cylinder 67 is fixedly connected to the end of the return spring 66 away from the square plate 64. A triangular scraper 68 is fixedly connected to the end of the third cylinder 67 away from the return spring 66. The cylindrical groove 65, the return spring 66, the third cylinder 67, and the triangular scraper 68 are all arranged in a circumferential array outside the square plate 64. The size of the square plate 64 is adapted to the inner wall size of the fermentation tank body 1. The use of the return spring 66 can keep the triangular scraper 68 in close contact and pressure with the inner wall of the fermentation tank body 1, so that it can effectively scrape off the sticky material and reduce the amount of residue. The design of the return spring 66 allows the triangular scraper 68 to maintain a certain elasticity when scraping off the sticky material, reducing direct friction with the inner wall and thus reducing the wear of the inner wall.

[0038] Compared with existing technologies, this device can reduce the adhering material on the inner wall of the fermentation tank body 1 by moving the triangular scraper 68 up and down, which can further push and mix the materials, making the stirring more uniform. Secondly, while the discharge auger 3 is discharging the material, the scraping action of the triangular scraper 68 can scrape off and send out the adhering residue, ensuring that there is no waste of raw materials, thereby improving the overall utilization rate of raw materials, reducing production costs, and removing residues can prevent them from affecting the subsequent fermentation process, ensuring the uniformity and consistency of fermented products, thereby improving the quality of the final product.

[0039] The following is the complete working process and working principle of the above embodiments:

[0040] First, during the fermentation and purification process of agricultural waste, the operator starts the drive device. The drive device drives the auxiliary cylinder 51 to rotate clockwise. The rotation of the auxiliary cylinder 51 drives the first cylinder 53 to rotate. The rotation of the first cylinder 53 causes the annular plate 62 to slide inside the annular plate 61. The rotation of the first cylinder 53 drives the threaded column 52 to rotate. Since the threaded column 52 is threadedly connected to the top of the fermentation tank body 1, the threaded column 52 moves upward while rotating. The upward movement of the threaded column 52 drives the long stirring rod 54 and the short stirring rod 55 to rotate upward in a spiral motion to stir the agricultural waste. Through the auxiliary cylinder 51 and the threaded column 55, the agricultural waste is stirred. The combined use of column 52 and first cylinder 53 enables the threaded column 52 to drive the long stirring rod 54 and short stirring rod 55 to move up and down inside the fermentation tank body 1 while rotating and stirring. Compared with the method of setting multiple layers of fixed stirring, the design of the long stirring rod 54 and short stirring rod 55 rotating up and down can reduce the number of stirring components, thereby reducing the space occupied. When the long stirring rod 54 and short stirring rod 55 rotate up and down in the fermentation tank, they can effectively mix the gas with the fermentation material, allowing oxygen to diffuse into the fermentation material more quickly. This dynamic stirring method can promote the uniform distribution of gas more effectively than fixed stirring, thereby improving the fermentation efficiency.

[0041] Meanwhile, as the long stirring rod 54 and the short stirring rod 55 rotate clockwise, they drive the filter cylinder 56 to rotate. When the filter cylinder 56 rotates inside the agricultural waste, the agricultural waste will squeeze the rotating plate 58, causing it to move into the interior of the filter cylinder 56. When the agricultural waste enters the interior of the filter cylinder 56, it separates large pieces of waste. When the drive device drives the auxiliary cylinder 51 to rotate counterclockwise, the filter cylinder 56 will also rotate counterclockwise. As the filter cylinder 56 rotates counterclockwise, the agricultural waste will squeeze the rotating plate 58 from the interior of the filter cylinder 56. The side of the rotating plate 58 closest to the opening of the filter cylinder 56 is blocked by the baffle plate 59, preventing the rotating plate 58 from opening the opening of the filter cylinder 56. Therefore, the large pieces of agricultural waste separated inside the filter cylinder 56 will not leave the interior of the filter cylinder 56. By using the filter cylinder 56, the second cylinder 57, the rotating plate 58, and the baffle plate 59 in combination, the spiral column 52 rotates and stirs while driving the filter cylinder 56 to rotate inside the fermentation tank body 1 to filter large pieces of feces. When the filter cylinder 56 rotates clockwise, the fermented material can squeeze the rotating plate 58 into the filter cylinder 56, thereby separating large pieces of feces and preventing them from falling into the discharge auger 3 and getting stuck. When it rotates counterclockwise, the fermented material pushes the rotating plate 58 and is blocked by the baffle plate 59, making it difficult for the filtered material to leak out. This design ensures the stability and reliability of the filtration process. By alternating clockwise and counterclockwise rotation of the spiral column 52, continuous filtration and separation of the fermented material can be achieved, thereby improving the filtration efficiency.

[0042] The first cylinder 53 slides up and down inside the vertical groove 510, simultaneously driving the annular plate 62 to move up and down. The annular plate 62's movement drives the annular column 61 to move up and down, which in turn drives the auxiliary cylinder 63 to move up and down. The auxiliary column 63's movement drives the square plate 64 to move, which in turn drives the triangular scraper 68 to move up and down on the inner wall of the fermentation tank body 1. The triangular scraper 68's movement reduces the sticky substances on the inner wall of the fermentation tank body 1 and further pushes and mixes the materials, making the mixing more uniform. After the material fermentation is complete, the discharge auger 3 needs to be rotated. The material is fed out, and the up-and-down movement of the triangular scraper 68 can also assist the discharge auger 3 in discharging the material, ensuring that there is no waste of raw materials, thereby improving the overall utilization rate of raw materials, reducing production costs, and removing residues to prevent them from affecting the subsequent fermentation process, ensuring the uniformity and consistency of fermented products, thereby improving the quality of the final product. During the up-and-down scraping process, the triangular scraper 68 is pressed tightly against the inner wall of the fermentation tank body 1 by the elastic force of the return spring 66. The rigidity of the return spring 66 makes the triangular scraper 68 have a large pressing force, which can effectively scrape off the sticky material and reduce the amount of residue.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An agricultural waste purification device, characterized in that, The fermentation tank includes a fermentation tank body (1), a discharge shell (2) is fixedly connected to the bottom of the fermentation tank body (1), a discharge auger (3) is rotatably connected inside the discharge shell (2), a partition plate (4) is slidably connected between the bottom of the fermentation tank body (1) and the top of the discharge shell (2), a uniform component (5) for improving the uniformity of agricultural waste fermentation is provided inside the fermentation tank body (1), and an auxiliary component (6) for improving the overall utilization rate of raw materials is provided inside the fermentation tank body (1).

2. The agricultural waste purification device according to claim 1, characterized in that: The uniform component (5) includes an auxiliary cylinder (51), the bottom of which is rotatably connected to the top of the fermentation tank body (1). A threaded column (52) is movably connected inside the auxiliary cylinder (51), the threaded column (52) penetrates the top of the fermentation tank body (1) and is threadedly connected thereto. A vertical groove (510) is provided on the outer surface of the auxiliary cylinder (51), and a first cylinder (53) is slidably connected inside the vertical groove (510). The outer surface of the first cylinder (53) is fixedly connected to the top of the threaded column (52).

3. The agricultural waste purification device according to claim 2, characterized in that: The threaded column (52) is located inside the fermentation tank body (1). A long stirring rod (54) and a short stirring rod (55) are fixedly connected to the outer surface of one end. A filter cylinder (56) is fixedly connected to the end of the long stirring rod (54) and the short stirring rod (55) away from the threaded column (52). A second cylinder (57) is fixedly connected to the inner wall of the filter cylinder (56). A rotating plate (58) is rotatably connected to the outer surface of the second cylinder (57). A baffle plate (59) is fixedly connected to the bottom of the inner wall of the filter cylinder (56).

4. The agricultural waste purification device according to claim 3, characterized in that: The long stirring rod (54) and the short stirring rod (55) are arranged in a circumferential array on the outer surface of the threaded column (52).

5. The agricultural waste purification device according to claim 2, characterized in that: The auxiliary component (6) includes a circular column (61) surrounding the outer surface of the auxiliary cylinder (51). The inner wall of the circular column (61) has a circular groove. A circular plate (62) is slidably connected inside the circular groove of the circular column (61). The inner wall of the circular plate (62) is fixedly connected to one end of the first cylinder (53) away from the auxiliary cylinder (51).

6. The agricultural waste purification device according to claim 5, characterized in that: An auxiliary cylinder (63) is fixedly connected to the outer surface of the annular column (61). The auxiliary cylinder (63) is composed of a parallel section and a vertical section. The parallel section of the auxiliary cylinder (63) is fixedly connected to the outer surface of the annular column (61), and the vertical section of the auxiliary cylinder (63) is slidably connected to the top of the fermentation tank body (1).

7. The agricultural waste purification device according to claim 6, characterized in that: The auxiliary cylinder (63) is fixedly connected to a square plate (64) at one end inside the fermentation tank body (1). A cylindrical groove (65) is provided on the inner wall of the square plate (64). A return spring (66) is fixedly connected inside the cylindrical groove (65). A third cylinder (67) is fixedly connected to the end of the return spring (66) away from the square plate (64). A triangular scraper (68) is fixedly connected to the end of the third cylinder (67) away from the return spring (66).

8. The agricultural waste purification device according to claim 7, characterized in that: The cylindrical slide (65), the reset spring (66), the third cylinder (67) and the triangular scraper (68) are all arranged in a circumferential array on the outside of the square plate (64), and the size of the square plate (64) is adapted to the inner wall size of the fermentation tank body (1).

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