Raw material pretreatment system of meat and bone meal agricultural enzyme biological fertilizer

Abstract

The invention discloses a raw material pretreatment system of an agricultural meat and bone meal enzyme biological fertilizer, and relates to the technical field of preparation of agricultural meat and bone meal enzyme biological fertilizers, and the raw material pretreatment system specifically comprises a limiting frame, a grinding and separating cylinder is fixed on the limiting frame through bolts, and a grinding box is fixedly connected to the limiting frame and located on the side of the grinding and separating cylinder; one side of a communicating pipeline at the bottom of the grinding box penetrates through and communicates with the grinding and separating cylinder; the problems of low crushing efficiency, non-uniform particle size, non-uniform auxiliary material mixing and the like existing in a traditional pretreatment method are solved through the technical means of multi-stage crushing, screening, airflow lifting, centrifugal tilting rod driven auxiliary material adding and the like, and the position of a sleeve shell on a net barrel is controlled by utilizing the rotating speed of a grinding combined disc; the system has the advantages that the pretreatment efficiency is improved, the particle size distribution is optimized, the uniform mixing of auxiliary materials is realized, and high-quality raw materials are provided for the production of agricultural enzyme biological fertilizers.

Description

Technical Field

[0001] The present invention relates to the technical field of the preparation of meat and bone meal agricultural enzyme bio-fertilizer, and specifically relates to a raw material pretreatment system for meat and bone meal agricultural enzyme bio-fertilizer. Background Technique

[0002] The pretreatment of meat and bone meal as an organic fertilizer raw material is a key link to ensure the safety of fermentation and fertilizer efficiency. Physical, chemical, and biological methods are required to eliminate potential risks and optimize fermentation conditions. The specific key points include raw material acceptance and classification, sterilization and disinfection treatment, crushing and particle size control, carbon-nitrogen ratio adjustment, moisture adjustment, heavy metal passivation, and temporary storage after pretreatment.

[0003] For example, the invention patent "A Pretreatment Device for Defatting Animal Meat Residue to Produce Meat and Bone Meal" with the publication number CN118988527B belongs to the crushing and particle size control step carried out in the initial stage of meat and bone meal preparation. Considering the splashing problem during the crushing of aggregates, by setting structures such as a slide plate, a guide plate, and a limiting airbag, the cooperation of the slide plate and the guide plate can prevent the splashing of hard materials and improve the safety of the use of the pretreatment device. During the feeding process, the slide plate swings reciprocally, and with the cooperation of the limiting airbag, periodic intermittent feeding is achieved, improving the crushing efficiency of the material.

[0004] However, since the subsequent preparation of feed from meat and bone meal needs to contact microorganisms, only a crushing roller is used to rotate at a high speed and impact the aggregates, and the crushing particle size is relatively irregular, which affects the attachment and decomposition efficiency of microorganisms. At the same time, there is a lack of active crushing and mixing, resulting in a reduction in the mixing efficiency of the crushed meat and bone meal with the subsequent high-carbon raw materials. Summary of the Invention

[0005] The purpose of the present invention is to provide a raw material pretreatment system for meat and bone meal agricultural enzyme bio-fertilizer to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A raw material pretreatment system for meat and bone meal agricultural enzyme bio-fertilizer, including a limiting frame, on which a grinding and separating cylinder is fixed by bolts, and a grinding box is fixedly connected to the limiting frame on the side of the grinding and separating cylinder. One side of the bottom of the grinding box is connected to a pipeline that penetrates through the grinding and separating cylinder and is connected to it.

[0007] A transmission sleeve is movably connected to the bottom of the grinding and separating cylinder. One side of the transmission sleeve penetrates through the bottom of the grinding and separating cylinder and is connected and fixed to a grinding combination plate. The grinding combination plate is fixedly connected in series by a plurality of disc combinations, and grinding discs are evenly movably connected to adjacent discs.

[0008] A groove sleeve is fixedly mounted on the inner wall of the grinding separation cylinder and located on the outer side of the grinding assembly disc, and the grooves on the inner wall of the groove sleeve are arranged corresponding to the grinding discs on the grinding assembly disc. A separation cover is fixedly connected to the inner wall of the grinding separation cylinder and located on the outer side of the groove sleeve. Dust exhaust ports are evenly opened at the bottom of the outer wall of the groove sleeve and are connected to the separation cover.

[0009] A mixing connecting cylinder is installed on the top of the grinding and separation cylinder, and a material storage isolation cover is connected and fixed on the top of the mixing connecting cylinder. A material receiving tray is slidably connected on the limiting frame and located at the bottom of the grinding and separation cylinder.

[0010] Furthermore, grinding rollers are symmetrically installed on the inner wall of the grinding box, and a guide plate is fixedly connected to the top of the grinding roller in the grinding box. There are two guide plates, which are distributed on the inner walls of both sides of the grinding box from top to bottom, and the length of the bottom guide plate is shorter than that of the top guide plate.

[0011] Furthermore, a transmission assembly is fixed in the limit frame by bolts, and a pulley at the end of the motor in the transmission assembly is sleeved with an outer wall of the transmission sleeve by a belt.

[0012] Furthermore, a centrifugal lever is connected to the top of the grinding assembly disc for uniform rotation, and an impact ball is fixed to the end of the centrifugal lever. The grinding disc in the grinding assembly disc and the groove on the inner wall of the groove sleeve are arranged in a trapezoidal opening.

[0013] Furthermore, a screening and removing mechanism is installed on the inner wall at the top of the grinding and separation cylinder, and the screening and removing mechanism includes a mesh cylinder and a sleeve shell. The inner wall at the top of the grinding and separation cylinder is fixedly connected with the mesh cylinder, and the outer wall of the mesh cylinder is slidably connected with the sleeve shell. The support on the sleeve shell passes through the mixing cylinder and is fixedly connected with a blocking block, and a material passing groove is opened on the blocking block.

[0014] Furthermore, a discharge pipe is fixedly connected to the inner wall of the mixing tube, a control valve is installed on the discharge pipe, one end of the discharge pipe extends to the transmission sleeve side and is fixedly connected to a discharge cover, and a vacuum adsorption component is installed on the mixing tube side.

[0015] Furthermore, a material storage isolation cover connected to the top of the mixing tube is evenly provided with a discharge cavity, a quantitative winding assembly is installed in the discharge cavity, and the end of the centrifugal tilting rod on the grinding combination disc is in contact with the bottom of the casing.

[0016] The raw material pretreatment method of the meat and bone meal agricultural enzyme biofertilizer is as follows:

[0017] Multi-stage crushing and mixing, with the meat and bone powder raw materials poured in from the guide plate side, the meat and bone powder initially crushed by the grinding roller enters the grinding and separation cylinder, and the high-speed rotating grinding combination disc driven by the transmission component rotates to grind and crush the falling meat and bone powder for the second time, and the vacuum adsorption component on the mixing cylinder side works to adsorb and lift the powder ≤ 2mm;

[0018] When the grinding combination disk rotates, it causes the centrifugal lever to rotate. The entire sleeve is pushed upward to move, resulting in the pre-mixed auxiliary materials in the top material storage isolation cover coming to the mixing cylinder synchronously along the material passing groove on the blocking block. After being blown by high-speed air flow, the crushed meat and bone meal and the auxiliary materials are mixed in the mixing cylinder, gradually accumulate in the discharge pipe, and are automatically discharged from the meat and bone meal and the auxiliary materials after the control valve on the discharge pipe is opened. The mixture is collected by the receiving tray on the limit frame.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. In the present invention, with the grinding combination disk in the grinding and separation cylinder as the control core, the driving and installed grinding discs are used to finely grind and crush the meat and bone meal. Under the condition of air flow screening, the intercepted and filtered powder materials and auxiliary materials are mixed in the mixing cylinder, realizing the multi-step combination of the raw material pretreatment of the meat and bone meal agricultural enzyme bio-fertilizer, improving the overall pretreatment efficiency. At the same time, with the rotation of the grinding combination disk, while the top centrifugal lever is lifted, the entire blocking block is pushed to move, realizing the connection between the top material storage isolation cover and the mixing cylinder. The pre-mixed rice husks, corn straws, and wood chips in the material storage isolation cover automatically enter the mixing cylinder to be mixed with the crushed meat and bone materials, and finally are discharged along the discharge pipe. The auxiliary materials and the powder materials are evenly mixed.

[0021] 2. In the present invention, the rotation speed of the grinding combination disk is controlled through the transmission component, realizing the movement of the entire sleeve on the outer wall of the mesh cylinder, and brushing the outer wall of the mesh cylinder, so as to maintain the air flow screening hole efficiency of the mesh cylinder for a long time. At the same time, the particle size transition crushing from the crushing roller to the grinding disc is realized, improving the uniformity of the subsequent particle size crushing of the meat and bone meal, increasing the specific surface area, and promoting the attachment and decomposition efficiency of microorganisms. Through technical means such as multi-stage crushing, screening, air flow lifting, and centrifugal lever-driven auxiliary material addition, the problems existing in the traditional pretreatment method, such as low crushing efficiency, uneven particle size, and uneven mixing of auxiliary materials, are solved. This system improves the pretreatment efficiency, optimizes the particle size distribution, realizes the uniform mixing of auxiliary materials, and provides high-quality raw materials for the production of agricultural enzyme bio-fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the raw material pretreatment system for the meat and bone meal agricultural enzyme bio-fertilizer of the present invention;

[0023] Figure 2 It is a front view structure schematic diagram of the raw material pretreatment system for the meat and bone meal agricultural enzyme bio-fertilizer of the present invention;

[0024] Figure 3 It is a side view structure schematic diagram of the raw material pretreatment system for the meat and bone meal agricultural enzyme bio-fertilizer of the present invention;

[0025] Figure 4 It is a schematic diagram of the connection structure between the grinding and separation cylinder and the grinding box of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the transmission sleeve connected to the grinding assembly disc of the present invention;

[0027] Figure 6 This is a schematic diagram of the cross-sectional structure of the grinding separation cylinder and the grinding box being connected to each other in the present invention;

[0028] Figure 7 It is a schematic diagram of the circulation structure of the ground meat and bone meal of the present invention.

[0029] In the figure: 1. limit frame; 2. grinding and separation cylinder; 3. grinding box; 4. guide plate; 5. material storage isolation cover; 6. grinding roller; 7. transmission assembly; 8. transmission sleeve; 9. discharge cover; 10. receiving plate; 11. mixing cylinder; 12. groove sleeve; 13. grinding combination plate; 14. grinding disc; 15. separation cover; 16. screening and dematerializing mechanism; 161. mesh cylinder; 162. sleeve shell; 163. plugging block; 164. material trough; 17. discharge pipe; 18. discharge cavity; 19. centrifugal lift rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-7 , the present invention provides a technical solution:

[0032] The pretreatment of meat and bone meal as an organic fertilizer raw material is a key link to ensure fermentation safety and fertilizer efficiency. Physical, chemical and biological methods are required to eliminate potential risks and optimize fermentation conditions. The present invention combines the key points of meat and bone meal crushing and particle size control and carbon-nitrogen ratio adjustment technology to achieve uniform crushing and uniform mixing control of auxiliary materials.

[0033] like Figure 1 As shown, the main grinding and separation cylinder 2 is installed on the limiting frame 1, and a grinding combination disc 13 is movably connected in the grinding and separation cylinder 2. The grinding and separation cylinder 2 is driven by the transmission assembly 7 on the limiting frame 1 to grind and crush the meat and bone meal initially crushed in the grinding box 3 for a second time. The large pieces of meat and bone meal are crushed into 10-20mm particles, and then crushed into powder ≤2mm in the subsequent process. The crushing is continuous and efficient.

[0034] like Figure 2 and Figure 3As shown, when the meat and bone meal is used as the pretreatment operation of the organic fertilizer raw material, the fresh meat and bone meal raw material needs to be poured into the guide plate 4 side of the grinding box 3, and the guide plate 4 is divided into two pieces, which are distributed on the inner walls of both sides of the grinding box 3 from top to bottom, and the bottom guide plate 4 is shorter than the top guide plate 4, ensuring that the raw materials can be evenly distributed and smoothly enter the grinding area, and the broken materials generated during the grinding process are splashed and intercepted by the guide plate 4, thereby improving the safety of the use of the pretreatment device;

[0035] The motor on the grinding roller 6 is started, and the raw material is preliminarily crushed by the grinding roller 6. The grinding roller 6 is usually made of wear-resistant alloy steel, and the surface is covered with a wear-resistant layer to improve the service life and grinding efficiency. According to the hardness and particle size of the raw material, the rotation direction and speed of the grinding roller 6 are properly adjusted to ensure the crushing effect. The preliminarily crushed material enters the grinding separation cylinder 2 through the connecting pipe;

[0036] The motor on the transmission assembly 7 is started, and the transmission sleeve 8 is driven to rotate at high speed through the belt transmission, thereby driving the grinding assembly disc 13 to rotate. Figure 5 and Figure 6 As shown, the grinding assembly disc 13 is composed of a plurality of discs fixed in series, and adjacent discs are evenly and movably connected with grinding discs 14, and the inner grinding discs 14 of the discs on adjacent layers are staggered, which effectively improves the contact probability between the grinding discs 14 and the crushed materials. The grinding discs 14 and the inner wall grooves of the groove sleeve 12 are arranged in a trapezoidal opening, which is conducive to the uniform distribution and refinement of the materials during the grinding process, and at the same time facilitates the movement of the crushed materials between the discs of each layer;

[0037] Under the high-speed rotation of the grinding assembly disc 13, the material is secondary ground and crushed in the grinding separation cylinder 2. The groove sleeve 12 is sleeved on the outer side of the grinding assembly disc 13, and the inner wall is provided with grooves corresponding to the grinding disc 14. It is used in conjunction with the grinding assembly disc 13 to further grind and refine the material.

[0038] At the same time, the dust discharge ports evenly arranged at the bottom of the outer wall of the groove sleeve 12 are connected to the separation cover 15 for discharging the dust generated during the grinding process. The separation cover 15 is fixedly connected to the inner wall of the grinding separation cylinder 2 and is located outside the groove sleeve 12 to form a relatively independent dust discharge area. The top of the separation cover 15 is convex, which facilitates the rising airflow to drive the grinding dust to move to the screening and stripping mechanism 16.

[0039] The entire screening and stripping mechanism 16 is divided into a dynamic part and a static part, wherein a mesh cylinder 161 is fixedly mounted on the inner wall of the top of the grinding and separation cylinder 2, and a sleeve 162 is slidably connected to the outer side thereof. The edge support at the end of the sleeve 162 penetrates the mixing cylinder 11 and is fixedly connected to a blocking block 163. A material passage trough 164 is provided on the blocking block 163. Figure 7 As shown;

[0040] Powders with a size of ≤2mm enter the mixing cylinder 11 through the screening and discharging mechanism 16. Some of them are blocked on the outer wall of the mesh cylinder 161. By adjusting the rotation speed of the grinding combination disk 13, the centrifugal lever 19 swings and floats, causing the sleeve 162 to move on the surface of the mesh cylinder 161, realizing automatic scraping and cleaning of the surface of the mesh cylinder 161. The screening and discharging mechanism 16 includes a mesh cylinder 161 and a sleeve 162. The mesh cylinder 161 is fixedly connected to the inner wall of the top of the grinding and separating cylinder 2, and the sleeve 162 is sleeved on the outer wall of the mesh cylinder 161 and is slidably connected;

[0041] When the grinding combination disk 13 rotates, as Figure 5 shown, centrifugal levers 19 are evenly rotatably connected to the top of the grinding combination disk 13. The centrifugal levers 19 are in an overall "L" shape, and an impact ball is fixed at the bottom end. Along with the high-speed rotation of the grinding combination disk 13, the continuously rotating and lifting centrifugal levers 19 begin to contact the sleeve 162, and the centrifugal levers 19 push the sleeve 162 to move;

[0042] As Figure 7 shown, the rising sleeve 162 pushes the blocking block 163 into the storage and isolation cover 5, realizing the connection between the material passing groove 164 and the discharge port of the storage and isolation cover 5. At this time, the auxiliary materials prepared in the storage and isolation cover 5 gradually enter the mixing cylinder 11 along the material passing groove 164 and are mixed with the adsorbed meat and bone meal;

[0043] As Figure 4 and Figure 6 shown, the entire storage and isolation cover 5 is used for storing auxiliary materials. Multiple discharge cavities 18 are arranged inside it. Automatic and precise discharging is realized by the rotation of the coiling shaft. According to the adjustment of the carbon-nitrogen ratio of the meat and bone meal, high-carbon raw materials such as rice husks, corn straws, and wood chips are added in the storage and isolation cover 5. According to the C / N of the meat and bone meal ≈5:1, auxiliary materials are added so that the C / N after mixing reaches 25 - 30:1;

[0044] To facilitate the mixing of meat and bone meal and auxiliary materials, a vacuum adsorption component is installed on the entire mixing cylinder 11. While adsorbing the meat and bone meal on the side of the entire mesh cylinder 161, the regular and uniform meat and bone meal is moved into the mixing cylinder 11. Along with the auxiliary materials with larger particle sizes in the material passing groove 164, they are uniformly mixed among the discharge pipes 17. Compared with setting a dedicated mixer or drum mixer, using air flow impact, the mixing uniformity is higher. And by opening the control valve on the discharge pipe 17, the mixed material automatically falls along the discharge hood 9 into the receiving tray 10 on the limit frame 1, facilitating the operator to collect the mixed material;

[0045] The raw material pretreatment system realizes the entire pretreatment process from raw material pouring to final product discharging by connecting various components in series. Each component works together to ensure the stability and safety of the meat and bone meal raw materials, improve the pretreatment efficiency, and provide high-quality raw materials for the preparation of agricultural enzyme bio-fertilizer.

[0046] Working principle of the present invention:

[0047] Pour the fresh meat and bone meal raw material to the side of the deflector 4 in the grinding box 3, start the motor of the grinding roller 6, and initially crush the raw material through the grinding roller 6. The preliminarily crushed material enters the grinding and separating cylinder 2 through the connecting pipe. Start the motor of the transmission assembly 7, and drive the transmission sleeve 8 to rotate at a high speed through belt transmission, and then drive the grinding combination disc 13 to rotate;

[0048] Under the high-speed rotation of the grinding combination disc 13, the material is subjected to secondary grinding and pulverization in the grinding and separating cylinder 2. The groove sleeve 12 is sleeved outside the grinding combination disc 13, and the inner wall is provided with a groove corresponding to the grinding disc 14, which is used in cooperation with the grinding combination disc 13 to further grind and refine the material. At the same time, the dust discharge ports uniformly opened at the bottom of the outer wall of the groove sleeve 12 are communicated with the partition cover 15 for discharging the dust generated during the grinding process. The powder with a particle size of ≤2 mm is adsorbed through the vacuum adsorption assembly on the mixing connecting cylinder 11 and enters the mixing connecting cylinder 11 through the screening and discharging mechanism 16;

[0049] When the grinding combination disc 13 rotates, the centrifugal lever 19 pushes the sleeve 162 to move, so that the blocking block 163 moves into the storage isolation cover 5, and the auxiliary material enters the mixing connecting cylinder 11 along the material passing groove 164. The vacuum adsorption assembly works to adsorb and lift the sieved powder, so that it is mixed evenly with the auxiliary material in the mixing connecting cylinder 11. Open the control valve on the discharge pipe 17, and the mixed material is discharged through the discharge pipe 17 to the receiving tray 10 for collection. The collected material can be used for subsequent fermentation or packaging processes to prepare agricultural enzyme bio-fertilizer.

[0050] The above is only an explanation of the structure of the present invention. Modifications, supplements or similar replacements made by those skilled in the art to the specific embodiments described shall fall within the protection scope of the present invention as long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book.

Claims

1. A raw material pretreatment system for a meat and bone meal agricultural enzyme bio-fertilizer, including a limiting frame (1), characterized in that, The grinding and separating cylinder (2) is fixed to the limiting frame (1) by bolts. A grinding box (3) is fixedly connected to the limiting frame (1) on the side of the grinding and separating cylinder (2). One side of the bottom of the grinding box (3) is connected to a pipeline that penetrates through the grinding and separating cylinder (2) and is communicated with it; A transmission sleeve (8) is movably connected to the bottom of the grinding and separating cylinder (2). One side of the transmission sleeve (8) penetrates through the bottom of the grinding and separating cylinder (2) and is fixedly connected to a grinding combination disc (13). The grinding combination disc (13) is fixedly connected in series through a plurality of disc combinations. Abrasive discs (14) are evenly and movably connected to adjacent discs; A groove sleeve (12) is fixedly sleeved on the inner wall of the grinding and separating cylinder (2) outside the grinding combination disc (13). The groove in the inner wall of the groove sleeve (12) is arranged corresponding to the abrasive discs (14) on the grinding combination disc (13). A partition cover (15) is fixedly connected inside the grinding and separating cylinder (2) outside the groove sleeve (12). Dust discharge ports are evenly arranged at the bottom of the outer wall of the groove sleeve (12) and are communicated with the partition cover (15); A mixing connection cylinder (11) is installed on the top of the grinding and separating cylinder (2). A storage material isolation cover (5) is fixedly connected to the top of the mixing connection cylinder (11). A receiving tray (10) is slidably connected to the limiting frame (1) at the bottom of the grinding and separating cylinder (2).

2. The raw material pretreatment system of a meat and bone meal agricultural enzyme bio-fertilizer according to claim 1, characterized in that, Grinding rollers (6) are symmetrically installed on the inner wall of the grinding box (3). A guide plate (4) is fixedly connected inside the grinding box (3) above the grinding rollers (6). The number of guide plates (4) is two, which are distributed on the inner walls of both sides of the grinding box (3) from top to bottom. The length of the bottom guide plate (4) is less than that of the top guide plate (4).

3. The raw material pretreatment system of a meat and bone meal agricultural enzyme bio-fertilizer according to claim 2, wherein, A transmission component (7) is fixed to the limiting frame (1) by bolts. The end pulley of the motor in the transmission component (7) is sleeved with the outer wall of the transmission sleeve (8) through a belt.

4. The raw material pretreatment system of a meat and bone meal agricultural enzyme bio-fertilizer according to claim 3, characterized in that, Centrifugal lever (19) is evenly rotatably connected to the top of the grinding combination disc (13). An impact ball is fixed at the end of the centrifugal lever (19). The abrasive discs (14) inside the grinding combination disc (13) and the groove in the inner wall of the groove sleeve (12) are arranged with trapezoidal openings.

5. The raw material pretreatment system of a meat and bone meal agricultural enzyme bio-fertilizer according to claim 4, characterized in that, A screening and discharging mechanism (16) is installed on the inner wall of the top of the grinding and separating cylinder (2). The screening and discharging mechanism (16) includes a mesh cylinder (161) and a sleeve (162). The mesh cylinder (161) is fixedly connected to the inner wall of the top of the grinding and separating cylinder (2). The sleeve (162) is sleeved and slidably connected to the outer wall of the mesh cylinder (161). The support column on the sleeve (162) penetrates through the mixing connection cylinder (11) and is fixedly connected to a blocking block (163). A material passing groove (164) is opened on the blocking block (163).

6. The raw material pretreatment system of a meat and bone meal agricultural enzyme bio-fertilizer according to claim 5, characterized in that, A discharge pipe (17) is fixedly connected to the inner wall of the mixing connection cylinder (11). A control valve is installed on the discharge pipe (17). One end of the discharge pipe (17) extends to the side of the transmission sleeve (8) and is fixedly connected to a discharge hood (9). A vacuum adsorption component is installed on the side of the mixing connection cylinder (11).

7. The raw material pretreatment system of a meat and bone meal agricultural enzyme bio-fertilizer according to claim 6, characterized in that A discharge cavity (18) is evenly formed in a storage material isolation cover (5) communicated with the top of the mixing material connecting cylinder (11). A quantitative coiling component is installed in the discharge cavity (18). The end of a centrifugal warping rod (19) on the grinding combination disc (13) abuts against the bottom of a sleeve (162).

8. The raw material pretreatment system of a meat and bone meal agricultural enzyme bio-fertilizer according to claim 7, characterized in that, The raw material pretreatment method of the meat and bone meal agricultural enzyme bio-fertilizer is as follows: Multi-stage crushing and mixing. With the meat and bone meal raw materials poured from the side of the guide plate (4), the meat and bone meal materials initially crushed by the grinding roller (6) enter the grinding and separating cylinder (2). Along with the rotation of the high-speed rotating grinding combination disc (13) driven by the transmission component (7), the falling meat and bone meal materials are subjected to secondary grinding and crushing, and the vacuum adsorption component on the side of the mixing material connecting cylinder (11) works to adsorb and lift the powder with a particle size of ≤2 mm. When the grinding combination disc (13) rotates, the centrifugal warping rod (19) rotates, pushing the entire sleeve (162) upward to move, causing the auxiliary materials proportioned in the top storage material isolation cover (5) to synchronously reach the mixing material connecting cylinder (11) along the material passing groove (164) on the blocking block (163). After being blown by the high-speed air flow, the crushed meat and bone meal and the auxiliary materials are mixed in the mixing material connecting cylinder (11) and gradually accumulate in the discharge pipe (17). After the control valve on the discharge pipe (17) is opened, the meat and bone meal and the auxiliary materials are automatically discharged, and the mixed materials are collected through the receiving tray (10) on the limit frame (1).

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