Fermentation device and method for cake organic fertilizer

Abstract

The invention relates to the technical field of cake fermentation, in particular to a cake organic fertilizer fermentation device and method.The cake organic fertilizer fermentation device comprises a fermentation tank body, the top end of the fermentation tank body is provided with a feeding port used for feeding materials and an exhaust port used for exhausting gas, and the bottom end of the fermentation tank body is provided with a discharging port used for discharging the materials; the bottom end of the transmission assembly extends into the fermentation tank body, the end, located on the outer side of the fermentation tank body, of the transmission assembly is connected with an air supply pipeline and a power supply circuit, and the transmission assembly is rotationally matched with the fermentation tank body; the ventilation assembly is fixed to the bottom end of the transmission assembly, communicates with the air supply pipeline through the transmission assembly and can rotate along with the transmission assembly to stir materials; and the stirring assembly is slidably connected to the transmission assembly in a sleeving mode, rotates along with the transmission assembly to stir materials, and is connected with the power supply circuit through the transmission assembly. According to the invention, the cake meal is in full contact with air, and the aerobic fermentation quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cake and meal fermentation, in particular to a cake and meal organic fertilizer fermentation device and a cake and meal organic fertilizer fermentation method. Background Art

[0002] Cakes and dregs are usually the residual materials after plant pressing, such as soybean cakes and rapeseed cakes. Even after being pressed to extract oil, these cakes and dregs still contain rich plant protein, and their protein content is usually above 30%. Therefore, these cakes and dregs are usually made into organic fertilizers after biological fermentation.

[0003] The most common method of cake fermentation is composting, which uses microorganisms widely found in nature to promote the biochemical process of converting degradable organic matter in solid waste into stable humus. Composting fermentation is a simple method, but it is greatly affected by the outside world and the fermentation quality is poorly controllable.

[0004] Therefore, in order to better achieve the fermentation of cakes and meal, fermentation equipment is used to ferment cakes and meal efficiently and with high quality. Since the cakes and meal being fermented need to be stirred and mixed, the ventilation structure of the aerobic fermentation device is usually set on the shell of the device, which leads to uneven distribution of oxygen in the cakes and meal pile during the fermentation process. Some areas have sufficient oxygen and vigorous microbial growth, such as the surface of the cakes and meal pile; other areas are lack of oxygen, so the growth of aerobic microorganisms is inhibited, such as the bottom and inside of the cakes and meal pile.

[0005] Based on this, it is necessary to design a fermentation device for cake organic fertilizer with good ventilation effect. Summary of the invention

[0006] The present invention aims at the deficiencies in the prior art and provides the following technical solutions:

[0007] According to one aspect of the present invention, there is provided a fermentation device for cake organic fertilizer, comprising:

[0008] A fermentation tank body, wherein the top end of the fermentation tank body has a feeding port for feeding materials and an exhaust port for exhausting gas, and the bottom end of the fermentation tank body has a discharge port for discharging materials;

[0009] A transmission assembly, wherein the bottom end of the transmission assembly extends into the fermentation tank body, and the end portion located outside the fermentation tank body is connected to the air supply pipeline and the power supply line, and the transmission assembly rotates in cooperation with the fermentation tank body;

[0010] A ventilation assembly, which is fixed at the bottom end of the transmission assembly and is connected to the air supply pipeline through the transmission assembly, and can rotate with the transmission assembly to stir the material; and

[0011] The stirring component is slidably sleeved on the transmission component and rotates with the transmission component to stir the material. The stirring component is connected to the power supply line through the transmission component, and the stirring component moves up and down along the transmission component based on the adjustment of the air supply.

[0012] As an improvement of the above technical solution, the transmission assembly at least comprises: a rod body with a hollow structure, a sliding cavity located in the middle of the rod body, and flow cavities located at both ends of the sliding cavity;

[0013] A plurality of inwardly concave limiting grooves are evenly distributed along the axial direction on the rod wall corresponding to the sliding cavity, the sliding cavity and the flow cavity at the bottom end thereof are both located in the fermentation tank body, and the flow cavity at the top end of the sliding cavity extends out of the fermentation tank body;

[0014] The sliding cavity is adapted to the stirring assembly, and the flow cavity at the bottom end of the sliding cavity is communicated with the ventilation assembly.

[0015] As an improvement of the above technical solution, the top end of the rod body is provided with a rotating shaft seal, and the flow cavity at the top end of the sliding cavity is connected to the air supply pipeline through the rotating shaft seal.

[0016] As an improvement of the above technical solution, the ventilation assembly at least comprises: a diversion chamber, a plurality of stirring plates connected to the diversion chamber, and a gas outlet notch located on the bottom end surface of the stirring plate;

[0017] The stirring blade 1 is annularly arranged on the circumferential outer wall of the diversion chamber, the stirring blade 1 is inclined, the air outlet slots are connected to the diversion chamber, and the other end of the stirring blade 1 is connected to the inner wall of the guide sleeve 1 of the annular structure;

[0018] The diversion cavity is communicated with the flow cavity at the bottom end of the sliding cavity.

[0019] As an improvement of the above technical solution, the stirring assembly at least includes: a magnetic piston assembly capable of regulating gas flow, a magnetic sleeve, and a plurality of stirring blades connected to the magnetic sleeve;

[0020] The magnetic piston assembly is located in the sliding cavity and slides with the sliding cavity. The magnetic sleeve is mounted on the rod wall corresponding to the sliding cavity and is adapted to the limiting groove. The stirring blade 2 is annularly arranged on the circumferential outer wall of the magnetic sleeve. The stirring blade 2 is inclined, and the other end of the stirring blade 2 is connected to the inner wall of the guide sleeve 2 of the annular structure.

[0021] As an improvement of the above technical solution, the magnetic piston assembly at least comprises: a rubber piston with an annular structure, an annular excitation winding located inside the rubber piston, and a control valve body located inside the annular excitation winding;

[0022] The magnetic field generated by the annular excitation winding after being energized attracts the magnetic sleeve. The annular excitation winding is connected to the power supply line through a spring wire, and the spring wire is in a compressed state in a normal state.

[0023] As an improvement of the above technical solution, a conductive slip ring is provided at the joint between the rod body and the top surface of the fermentation tank body, and the spring wire is connected to the power supply line through the conductive slip ring.

[0024] According to another aspect of the present invention, there is provided a fermentation method for cake organic fertilizer, comprising the following steps:

[0025] S10, after completing the internal cleaning of the fermentation tank body, closing the discharge port, and feeding the cake into the fermentation tank body through the feeding port for fermentation;

[0026] S20, opening the air supply pipeline, power supply line and exhaust port, introducing air into the fermenting cake, the air is discharged from the air outlet slot, and driven by the rotating rod body, the air is evenly dispersed in the cake at the bottom layer;

[0027] S30, the second stirring blade is driven by the rotating rod body to continuously stir the cake so that it contacts with air;

[0028] S40, adjusting the opening and closing degree of the control valve body so that the pressure of the chamber above the magnetic piston assembly changes, so that the magnetic sleeve moves up and down along the rod body, and the air is continuously reorganized and transferred upward through the up and down stirring of the stirring blade 2 to form an exhaust passage, so that the cake is in contact with sufficient air;

[0029] S50, completing the oxygen delivery process, closing the gas supply pipeline, power supply line and exhaust port

[0030] As an improvement of the above technical solution, in step S40, when the opening of the control valve body is at a high value, the magnetic sleeve rises along the rod body;

[0031] When the opening of the control valve body is at a low value, the magnetic sleeve descends along the rod body;

[0032] When the opening degree of the control valve body is at an intermediate value, the position of the magnetic sleeve on the rod body does not change.

[0033] Beneficial effects of the present invention:

[0034] The transmission component, ventilation component and stirring component are structurally integrated so that they can achieve efficient ventilation. The ventilation component and stirring component can not only stir and mix the fermenting cake and increase the air contact area, but the stirring component can also adjust the stirring component up and down based on the conditions of the ventilation process, so that the air is transferred upward to form a continuous reorganization of the exhaust passage, so that the cake and meal can be fully contacted with air, thereby improving the quality of aerobic fermentation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The overall structure front view of the fermentation device of cake organic fertilizer;

[0036] Figure 2 for Figure 1 Sectional view at AA in the middle;

[0037] Figure 3 It is a front view of the overall structure of the fermentation device for cake organic fertilizer after the transmission component, ventilation component and stirring component are assembled;

[0038] Figure 4 It is a top view of the assembled transmission component and ventilation component in the fermentation device of cake organic fertilizer;

[0039] Figure 5 for Figure 4 Sectional view at the middle BB;

[0040] Figure 6 This is a schematic diagram of the internal structure of the magnetic piston assembly in the fermentation device of cake organic fertilizer.

[0041] Figure numerals: 100, fermentation tank body; 110, feed port; 120, exhaust port; 130, discharge port; 200, transmission assembly; 210, rod body; 220, sliding chamber; 230, flow chamber; 240, limit groove; 250, rotating shaft seal; 260, conductive slip ring; 300, ventilation assembly; 310, diverter chamber; 320, stirring blade one; 330, air outlet slot; 340, guide sleeve one; 400, stirring assembly; 410, magnetic piston assembly; 411, rubber piston; 412, annular excitation winding; 413, control valve body; 414, spring wire; 420, magnetic sleeve; 430, stirring blade two; 440, guide sleeve two. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] In the existing cake fermentation process, oxygen is unevenly distributed in the cake pile. Some areas have sufficient oxygen and vigorous microbial growth, such as the surface of the cake pile; other areas are lack of oxygen, so the growth of aerobic microorganisms is inhibited, such as the bottom and inside of the cake pile.

[0044] See attached Figure 1-6 As shown, in order to solve the above technical problems, a fermentation device for cake organic fertilizer is provided, including: a fermentation tank body 100, a transmission component 200, a ventilation component 300 and a stirring component 400.

[0045] The fermentation tank body 100 has a feeding port 110 for feeding materials and an exhaust port 120 for exhausting gas at the top, and a discharge port 130 for discharging materials at the bottom.

[0046] The bottom end of the transmission assembly 200 extends into the fermentation tank body 100, and the end located outside the fermentation tank body 100 is connected to the air supply pipeline and the power supply line. The transmission assembly 200 rotates in cooperation with the fermentation tank body 100.

[0047] The ventilation component 300 is fixed at the bottom end of the transmission component 200, and is connected to the air supply pipeline through the transmission component 200, and can rotate with the transmission component 200 to stir the material.

[0048] The stirring assembly 400 is slidably sleeved on the transmission assembly 200 and rotates with the transmission assembly 200 to stir the materials. The stirring assembly 400 is connected to the power supply line through the transmission assembly 200. The stirring assembly 400 moves up and down along the transmission assembly 200 based on the adjustment of the air supply.

[0049] In this solution, the transmission component 200, the ventilation component 300 and the stirring component 400 are structurally integrated so that while they can achieve efficient ventilation, the ventilation component 300 and the stirring component 400 can not only stir and mix the fermenting cake and increase the air contact area, but the stirring component 400 can also adjust the stirring component 400 up and down based on the conditions of the ventilation process, so that the air is transferred upward to form a continuous reorganization of the exhaust passage, so that the cake and meal are in sufficient contact with air, thereby improving the quality of aerobic fermentation.

[0050] In order to facilitate the understanding of the present technical solution, the transmission assembly 200 is further described and a specific implementation is given. The transmission assembly 200 is used for power input, and drives the ventilation assembly 300 and the stirring assembly 400 to rotate, and forms an air flow channel.

[0051] See attached Figure 2 , 3 As shown in , 5 , the transmission assembly 200 includes: a rod body 210 , a sliding cavity 220 , and a flow cavity 230 .

[0052] Specifically, the rod body 210 is set to a hollow structure with a closed bottom and an open top. The middle part of the inner side of the rod body 210 constitutes a sliding cavity 220, and the inside of the rod body 210 at both ends of the sliding cavity 220 is a flow cavity 230. Preferably, the diameter of the outer wall of the rod body 210 corresponding to the sliding cavity 220 is larger than the diameter of the rod body 210 corresponding to the flow cavity 230. In addition, a plurality of concave limiting grooves 240 are evenly distributed along the axial direction on the rod wall corresponding to the sliding cavity 220.

[0053] The step surface structure is formed at the joint of the sliding cavity 220 and the flow cavity 230, which can realize the limiting function, and can achieve a better limiting effect in conjunction with the limiting groove 240. The axial distribution can ensure the stability of the moving direction.

[0054] The sliding cavity 220 and the flow cavity 230 at the bottom thereof are both located in the fermentation tank body 100, and the flow cavity 230 at the top of the sliding cavity 220 extends out of the fermentation tank body 100. That is, only a portion of the upper part of the rod body 210 needs to be exposed outside the fermentation tank body 100 to ensure the transmission function, and the other portion is located in the fermentation tank body 100, and the length of the sliding cavity 220 is increased as much as possible to achieve control of a larger area.

[0055] The sliding chamber 220 is adapted to the stirring assembly 400 , and the flow chamber 230 at the bottom end of the sliding chamber 220 is communicated with the ventilation assembly 300 to achieve the comprehensive performance of ventilation and stirring.

[0056] Preferably, the top of the rod body 210 has a rotating shaft seal 250, and the flow chamber 230 at the top of the sliding chamber 220 is connected to the air supply pipeline through the rotating shaft seal 250. The rotating shaft seal 250 can ensure that the rod body 210 is connected to the air supply pipeline, and the rotation of the rod body 210 will not cause air leakage.

[0057] The end of the rod body 210 extending out of the fermentation tank body 100 is connected to the driving mechanism through a pulley b or a gear box structure to achieve power input.

[0058] To facilitate understanding of the technical solution, the ventilation assembly 300 is further described and a specific implementation is given. The ventilation assembly 300 is used to evenly release oxygen to the bottom layer of the fermenting cake and stir the fermenting cake to promote full contact between oxygen and the cake.

[0059] See attached Figure 3 , 4 As shown in FIG. 5 , the ventilation assembly 300 includes: a diversion chamber 310 , a plurality of stirring blades 320 , an air outlet slot 330 , and a guide sleeve 340 .

[0060] Specifically, the diverter chamber 310 is composed of a hollow flat shell, and a plurality of stirring blades 320 are arranged in an annular shape on the circumferential outer wall of the diverter chamber 310 to form a fan-shaped structure. The air outlet slots 330 are located on the bottom end surface of the corresponding stirring blades 320, and the air outlet slots 330 are all connected to the diverter chamber 310. The other ends of the stirring blades 320 are connected to the inner wall of the guide sleeve 340 of the annular structure. Preferably, the stirring blades 320 are arranged tilted so that the cake can be stirred during the movement.

[0061] The flow-dividing cavity 310 is connected to the flow cavity 230 at the bottom of the sliding cavity 220 . When air is filled into the rod body 210 , the air enters the flow-dividing cavity 310 through the lowermost flow cavity 230 and is then dispersed and discharged from the air outlet slot 330 .

[0062] The guide sleeve 340 is provided to connect the ends of the stirring blade 320 so that the force can be evenly dispersed. On the other hand, it is used for guiding so that the materials on the inner and outer sides of the guide sleeve 340 flow in opposite directions, thereby promoting full contact between oxygen and cake.

[0063] To facilitate understanding of the present technical solution, the stirring assembly 400 is further described and a specific implementation is given. The stirring assembly 400 can move up and down along the rod 210 to stir the cake and promote full contact between oxygen and the cake.

[0064] See attached Figure 3 , 4 As shown in FIG. 5 , the stirring assembly 400 includes: a magnetic piston assembly 410 , a magnetic sleeve 420 , a second stirring blade 430 , and a second guide sleeve 440 .

[0065] Specifically, the magnetic piston assembly 410 can regulate the air flow rate passing through the sliding cavity 220. The magnetic piston assembly 410 is located in the sliding cavity 220 and slides with the sliding cavity 220. Lubricating oil can be added in actual application. The magnetic sleeve 420 is sleeved on the outer wall of the rod body 210 corresponding to the sliding cavity 220 and is adapted to the limiting groove 240 to ensure that the magnetic sleeve 420 can only move along the axial direction of the rod body 210, and the position of the magnetic sleeve 420 corresponds to that of the magnetic piston assembly 410. The stirring blade 430 is annularly arranged on the circumferential outer wall of the magnetic sleeve 420. The stirring blade 430 is tilted, and the other end of the stirring blade 430 is connected to the inner wall of the guide sleeve 440 of the annular structure.

[0066] The magnetic sleeve 420 and the magnetic piston assembly 410 perform work contactlessly through magnetic force, and the magnetic sleeve 420 can be pushed by pushing the magnetic piston assembly 410. Preferably, the material of the magnetic sleeve 420 is one of ferritic stainless steel, nickel alloy, martensitic stainless steel, and titanium alloy.

[0067] Preferably, the inclination direction of the stirring blade 2 430 is different from that of the stirring blade 1 320. When the rod 210 drives the stirring blade 2 430 and the stirring blade 1 320 to rotate, the cake in the fermentation tank 100 will form at least two circulation paths, and the stirring effect is better.

[0068] See attached Figure 6 As shown, based on the above-mentioned embodiment, a specific embodiment of the magnetic piston assembly 410 is further provided.

[0069] The magnetic piston assembly 410 includes: a rubber piston 411 of an annular structure, an annular excitation winding 412 located inside the rubber piston 411 , and a control valve body 413 located inside the annular excitation winding 412 .

[0070] Specifically, the rubber piston 411 is located at the outermost layer, directly in contact with the inner wall of the sliding cavity 220, and in frictional contact with the inner wall of the sliding cavity 220 when the magnetic piston assembly 410 moves. The annular excitation winding 412 is used to generate a magnetic field after power is turned on, and the magnetic sleeve 420 is driven to move by the force of the magnetic field. The control valve body 413 is used to regulate the air flow rate passing through the sliding cavity 220, and the pressure change on both sides of the magnetic piston assembly 410 is changed by adjusting the difference in flow rate.

[0071] In order to prevent the magnetic field generated by the annular excitation winding 412 from affecting the control valve body 413 after power is turned on, a magnetic shielding cover a with an I-shaped cross-section is set between the control valve body 413 and the annular excitation winding 412 to isolate the influence of the magnetic field on the control valve body 413 and allow the magnetic field to fully act on the magnetic sleeve 420.

[0072] In this embodiment, the spring wire 414 is elastic and is in a compressed state under normal conditions. Since the annular excitation winding 412 is connected to the power supply line through the spring wire 414, the magnetic piston assembly 410 is located at the upper end of the sliding cavity 220 under normal conditions.

[0073] When the opening and closing degree of the control valve body 413 is adjusted, based on the force of the spring wire 414, the magnetic piston assembly 410 can move downward, stop and reset, and can achieve stirring at any position on the rod wall corresponding to the sliding cavity 220.

[0074] Preferably, a conductive slip ring 260 is provided at the joint between the rod body 210 and the top surface of the fermentation tank body 100, and the spring wire 414 is connected to the power supply line through the conductive slip ring 260. The provision of the conductive slip ring 260 enables the spring wire 414 to be stably connected to the power supply line even when the rod body 210 is in a rotating state.

[0075] According to another aspect of the present invention, there is provided a fermentation method for cake organic fertilizer, comprising the following steps:

[0076] S10, after the internal cleaning of the fermentation tank body 100 is completed, the discharge port 130 is closed, and the cake is fed into the fermentation tank body 100 through the feed port 110 for fermentation. The preparation work for fermentation is carried out.

[0077] S20, open the air supply pipeline, power supply line and exhaust port 120, and introduce air into the fermenting cake, the air is discharged from the air outlet slot 330, and driven by the rotating rod body 210, the air is evenly dispersed in the cake at the bottom layer, and basic oxygen supply work is performed.

[0078] S30, the stirring blade 2 430 is driven by the rotating rod body 210 to continuously stir the cake and make it contact with air, and to perform preliminary stirring and mixing to improve the contact efficiency between oxygen and cake.

[0079] S40, adjust the opening and closing degree of the control valve body 413 to change the pressure of the chamber above the magnetic piston assembly 410, so that the magnetic sleeve 420 can move up and down along the rod body 210, and the air is continuously reorganized and transferred upward through the up and down stirring of the stirring piece 2 430 to form an exhaust passage, so that the cake is in contact with sufficient air.

[0080] S50, complete the oxygen delivery process, close the gas supply pipeline, power supply line and exhaust port 120

[0081] Specifically, in step S40, when the opening of the control valve body 413 is at a high value (i.e., when the flow rate is relatively high), the magnetic sleeve 420 rises along the rod body 210. Due to the force of the spring wire 414, the magnetic piston assembly 410 has a force to move upward. If the magnetic piston assembly 410 is already at the highest position inside the sliding chamber 220, the magnetic piston assembly 410 remains in position.

[0082] When the opening of the control valve body 413 is at a low value, the magnetic sleeve 420 descends along the rod body 210. At this time, the pressure at the air inlet end of the magnetic piston assembly 410 increases rapidly, causing the magnetic piston assembly 410 to be subjected to a greater air force, which is much greater than the force of the spring wire 414 on the magnetic piston assembly 410, so that the magnetic piston assembly 410 has a force to move downward until it moves to the lowest position inside the sliding cavity 220.

[0083] When the opening of the control valve body 413 is at an intermediate value, the position of the magnetic sleeve 420 on the rod body 210 does not change, that is, the force of the spring wire 414 on the magnetic piston assembly 410 is consistent with the force of the air pressure on the magnetic piston assembly 410 .

[0084] When the stirring assembly 400 needs to reciprocate along the rod body 210, first down and then up, the opening of the control valve body 413 only needs to be set to a low value, and when the magnetic piston assembly 410 moves to the lowest position inside the sliding chamber 220, the opening of the control valve body 413 is set to a low value again, and the magnetic piston assembly 410 gradually moves to the highest position inside the sliding chamber 220, so that the cycle can be realized. And in the process of regulation, it does not affect the input of air into the cake.

[0085] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A fermentation device for cake organic fertilizer, characterized in that: include: A fermentation tank body (100), wherein the fermentation tank body (100) has a feeding port (110) for feeding materials and an exhaust port (120) for exhausting gas at the top end, and a discharge port (130) for discharging materials at the bottom end; A transmission assembly (200), wherein the bottom end of the transmission assembly (200) extends into the fermentation tank body (100), and the end portion located outside the fermentation tank body (100) is connected to the air supply pipeline and the power supply line, and the transmission assembly (200) and the fermentation tank body (100) are rotatably matched; A ventilation assembly (300), wherein the ventilation assembly (300) is fixed at the bottom end of the transmission assembly (200), is connected to the air supply pipeline through the transmission assembly (200), and can rotate with the transmission assembly (200) to stir the material; and A stirring component (400) is slidably sleeved on the transmission component (200) and rotates with the transmission component (200) to stir materials. The stirring component (400) is connected to a power supply line through the transmission component (200). The stirring component (400) moves up and down along the transmission component (200) based on the adjustment of air supply.

2. The fermentation device of cake organic fertilizer according to claim 1, characterized in that: The transmission assembly (200) comprises at least: a rod body (210) with a hollow structure, a sliding cavity (220) located in the middle of the rod body (210), and flow cavities (230) located at both ends of the sliding cavity (220); A plurality of inwardly concave limiting grooves (240) are evenly distributed along the axial direction on the rod wall corresponding to the sliding cavity (220); the sliding cavity (220) and the flow cavity (230) located at the bottom end thereof are both located in the fermentation tank body (100); and the flow cavity (230) at the top end of the sliding cavity (220) extends out of the fermentation tank body (100); The sliding chamber (220) is adapted to the stirring assembly (400), and the flow chamber (230) at the bottom end of the sliding chamber (220) is in communication with the ventilation assembly (300).

3. The fermentation device of cake organic fertilizer according to claim 2, characterized in that: The top end of the rod body (210) is provided with a rotating shaft seal (250), and the flow cavity (230) at the top end of the sliding cavity (220) is connected to the air supply pipeline via the rotating shaft seal (250).

4. The fermentation device of cake organic fertilizer according to claim 2, characterized in that: The ventilation assembly (300) comprises at least: a flow diversion chamber (310), a plurality of stirring blades (320) connected to the flow diversion chamber (310), and a gas outlet notch (330) located on the bottom end surface of the stirring blade (320); The stirring blade 1 (320) is annularly arranged on the circumferential outer wall of the diversion chamber (310), the stirring blade 1 (320) is inclined, the air outlet slots (330) are connected to the diversion chamber (310), and the other end of the stirring blade 1 (320) is connected to the inner wall of the guide sleeve 1 (340) of the annular structure; The flow dividing chamber (310) is in communication with the flow chamber (230) at the bottom end of the sliding chamber (220).

5. The fermentation device of cake organic fertilizer according to claim 2 is characterized in that: The stirring assembly (400) comprises at least: a magnetic piston assembly (410) capable of regulating gas flow, a magnetic sleeve (420), and a plurality of stirring blades (430) connected to the magnetic sleeve (420); The magnetic piston assembly (410) is located in the sliding cavity (220) and slides with the sliding cavity (220). The magnetic sleeve (420) is sleeved on the rod wall corresponding to the sliding cavity (220) and is adapted to the limiting groove (240). The stirring blade 2 (430) is annularly arranged on the circumferential outer wall of the magnetic sleeve (420). The stirring blade 2 (430) is inclined, and the other end of the stirring blade 2 (430) is connected to the inner wall of the guide sleeve 2 (440) of the annular structure.

6. The fermentation device of cake organic fertilizer according to claim 5 is characterized in that: The magnetic piston assembly (410) comprises at least: a rubber piston (411) of an annular structure, an annular excitation winding (412) located inside the rubber piston (411), and a control valve body (413) located inside the annular excitation winding (412); The magnetic field generated by the annular excitation winding (412) after being energized attracts the magnetic sleeve (420); the annular excitation winding (412) is connected to a power supply line via a spring wire (414); and the spring wire (414) is in a compressed state in a normal state.

7. The fermentation device of cake organic fertilizer according to claim 6 is characterized in that: A conductive slip ring (260) is provided at the joint between the rod body (210) and the top surface of the fermentation tank body (100), and the spring wire (414) is connected to the power supply line through the conductive slip ring (260).

8. A method for fermenting organic fertilizer from cakes, applicable to a fermentation device for organic fertilizer from cakes according to any one of claims 1 to 7, characterized in that: The following steps are involved: S10, after the internal cleaning of the fermentation tank body (100) is completed, the discharge port (130) is closed, and the cake is fed into the fermentation tank body (100) through the feeding port (110) for fermentation; S20, opening the air supply pipeline, power supply line and exhaust port (120), introducing air into the fermenting cake, the air is discharged from the air outlet slot (330), and driven by the rotating rod body (210), the air is evenly dispersed in the cake at the bottom layer; S30, the second stirring blade (430) is driven by the rotating rod (210) to continuously stir the cake so that it contacts with air; S40, adjusting the opening and closing degree of the control valve body (413) to change the pressure of the chamber above the magnetic piston assembly (410), so that the magnetic sleeve (420) can move up and down along the rod body (210), and the air is continuously reorganized and transferred upward through the up and down stirring of the stirring blade 2 (430) to form an exhaust passage, so that the cake is in contact with sufficient air; S50, completing the oxygen delivery process, closing the gas supply pipeline, power supply line and exhaust port (120).

9. The fermentation method of cake organic fertilizer according to claim 8, characterized in that: In step S40, when the opening of the control valve body (413) is at a high value, the magnetic sleeve (420) rises along the rod body (210); When the opening degree of the control valve body (413) is at a low value, the magnetic sliding sleeve (420) descends along the rod body (210); When the opening degree of the control valve body (413) is at an intermediate value, the position of the magnetic sleeve (420) on the rod body (210) does not change.

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