Soil conditioner production system

Abstract

The utility model relates to a soil conditioner production system which comprises an inorganic solid waste treatment module, an agricultural waste treatment module and a powder mixing device. The inorganic solid waste treatment module sequentially comprises an inorganic solid waste crushing device, a magnetic separation device and a first conveying mechanism; the agricultural waste treatment module sequentially comprises an agricultural waste crushing device, a disinfection device and a second conveying mechanism; wherein outlets of the first conveying mechanism and the second conveying mechanism are communicated with the input end of the powder mixing device, so that a continuous production line is formed. The inorganic solid waste treatment module is used for removing heavy metal in inorganic solid waste in the production process of the soil conditioner, and the inorganic solid waste treatment module and the agricultural waste treatment module are connected in parallel and then connected with the powder mixing device in series, so that continuous production of raw material cooperative treatment is realized; meanwhile, cross contamination of heavy metal in inorganic solid waste and bacteria, grass seeds and the like in agricultural waste is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of production equipment, and in particular relates to a soil conditioner production system. Background Technology

[0002] For a long time, applying acidic soil conditioners has been the simplest way to address soil acidification. Soil conditioners possess three main properties: water retention, fertilization, and aeration. They can loosen the soil, improve soil aeration, reduce soil bulk density, promote soil microbial activity, and enhance soil water and fertilizer permeability. This not only strengthens crop disease resistance but also increases crop yield and improves the quality of agricultural products, making them a new type of green fertilizer for agriculture and forestry worldwide.

[0003] Common acidic soil conditioners include quicklime and limestone powder. However, long-term application of quicklime can easily lead to soil compaction, imbalance of elements in the soil, and potential re-acidification. Solid wastes such as phosphogypsum, titanium gypsum, and desulfurization gypsum are used to make soil conditioners. Titanium gypsum is specifically used for acidic soils, while phosphogypsum and desulfurization gypsum, when combined with other materials, can be made into acidic or alkaline conditioners. However, these solid wastes contain large amounts of harmful metals. Direct application to the soil can release heavy metals (such as cadmium, lead, mercury, and arsenic) into the soil in water-soluble or exchangeable forms. These active heavy metals are easily absorbed by plants, accumulate through the food chain, and ultimately harm human health. Therefore, waste-based soil conditioners are difficult to promote.

[0004] Existing technology discloses a mineral soil conditioner produced from fly ash and its preparation method. This method involves adding various acidic solvents to fly ash to dissolve heavy metal elements, then using sodium sulfide solution to precipitate the acid-soluble heavy metal ions, allowing the acidic solvents to be reused. The refined fly ash after heavy metal removal is then mixed with calcium-based compounds, potassium-based compounds, and other substances, dried, and activated by calcination to obtain a mineral soil conditioner with silicon, calcium, potassium, and magnesium as its main mineral nutrients and weakly alkaline properties. However, this preparation method uses acidic solvents to dissolve heavy metal elements in fly ash, which is inefficient and prolongs the production cycle of the soil conditioner; the heavy metals are ultimately disposed of through landfill, resulting in low added value. Utility Model Content

[0005] This invention provides a soil conditioner production system that can recover heavy metals from inorganic solid waste on the soil conditioner production line, thereby shortening the production cycle of soil conditioners.

[0006] The specific technical solution provided by this utility model is as follows:

[0007] The soil conditioner production system provided by this utility model includes:

[0008] The inorganic solid waste treatment module includes, in sequence, an inorganic solid waste crushing device, a magnetic separation device, and a first conveying mechanism;

[0009] The agricultural waste treatment module includes, in sequence, an agricultural waste crushing device, a disinfection device, and a second conveying mechanism;

[0010] The powder mixing device has its outlets connected to the input end of both the first and second conveying mechanisms, forming a continuous production line.

[0011] In some embodiments of this utility model, the inorganic solid waste pulverizing device is selected from any of the following configurations:

[0012] (a) Crusher and grinder used in series;

[0013] (b) Grinding machine;

[0014] The discharge particle size of the inorganic solid waste crushing device is ≤80 mesh.

[0015] In some embodiments of this utility model, the crusher is one or more of a jaw crusher, impact crusher, double roll crusher, and vertical shaft impact crusher connected in parallel or in series; the grinding mill is one or more of a ball mill, Raymond mill, and air jet mill connected in parallel or in series.

[0016] In some embodiments of this utility model, the magnetic separation device includes:

[0017] The box-shaped main body has a feed inlet at the top and a discharge hopper and at least one waste hopper at the bottom.

[0018] The feeding and spreading device is located below the feeding port and is used to evenly spread the raw materials entering the box-shaped body onto the conveying interface;

[0019] At least one set of transmission separation components, including:

[0020] The belt drive mechanism consists of a strong magnetic roller, a non-magnetic roller, and a horizontal conveyor belt. The strong magnetic roller is located at the discharge end of the horizontal conveyor belt and is used to adsorb harmful metal impurities in the raw materials.

[0021] The separation guide plate includes a front guide plate and a rear guide plate, which are arranged in an inverted V shape, with their tips located below the axis of the strong magnetic roller and adjacent to the horizontal conveyor belt;

[0022] The front guide plate guides the material to the inlet of the discharge hopper or above the next horizontal conveyor belt, while the rear guide plate guides the material to the inlet of the waste hopper.

[0023] In some embodiments of this invention, the agricultural waste crushing device is a blade-type crusher, used to crush agricultural waste to a length ≤ 5 mm. Preferably, it is used to crush agricultural waste to a length ≤ 1 mm.

[0024] In some embodiments of this utility model, the disinfection device is one or a combination of a high-temperature physical disinfection device, a chemical disinfection device, or both.

[0025] In some embodiments of this utility model, the soil conditioner production system further includes:

[0026] The granulation device has its input end connected to the outlet of the powder mixing device for granulation of mixed powders;

[0027] In some embodiments of this utility model, the soil conditioner production system further includes:

[0028] The drying equipment has its input end connected to the outlet of the granulation device and is used to dehydrate and dry the formed granules.

[0029] In some embodiments of this utility model, the soil conditioner production system further includes:

[0030] The screening module, whose input end is connected to the outlet of the drying equipment, is configured to separate materials into coarse particles, medium particles, fine particles, and substandard powder through a three-stage gradient screening process; the screening module includes a finished product outlet and a return material outlet;

[0031] The packaging module, whose input end is connected to the finished product outlet, is used for individual or mixed packaging of coarse, medium, and fine particles.

[0032] In some embodiments of this utility model, the return material outlet is connected to the input end of the granulation device to form a continuous production line.

[0033] Based on the technical solution provided by this utility model, the inorganic solid waste treatment module removes heavy metals from inorganic solid waste through magnetic separation after crushing, while the agricultural waste treatment module eliminates bacteria and weed seed activity through high-temperature treatment after crushing agricultural waste. A powder mixing device mixes the treated organic and inorganic powders. The use of the inorganic solid waste treatment module enables the removal of heavy metals from inorganic solid waste during the soil conditioner production process, shortening the heavy metal removal time. The design of the parallel connection of the inorganic solid waste treatment module and the agricultural waste treatment module, followed by the series connection of the powder mixing device, achieves continuous production with co-processing of raw materials, while avoiding cross-contamination between heavy metals in inorganic solid waste and bacteria and weed seeds in agricultural waste.

[0034] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of a soil conditioner production system provided in one embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of the magnetic separation device provided in an embodiment of the present utility model;

[0038] Figure 3 This is a schematic diagram of the structure of the conveying and separating component provided in an embodiment of the present utility model;

[0039] In the picture:

[0040] 1. Inorganic solid waste treatment module; 11. Inorganic solid waste crushing device; 12. Magnetic separation device; 121. Box-type main body; 121a. Feed inlet; 121b. Discharge hopper; 121c. Waste hopper; 122. Feed spreading device; 123. Conveying and separating assembly; 1231. Belt drive mechanism; 1231a. Strong magnetic roller; 1231b. Non-magnetic roller; 1231c. Horizontal conveyor belt; 1232. Separation guide plate; 1232a. Front guide plate; 1232b. Rear guide plate; 13. First conveying mechanism;

[0041] 2. Agricultural waste treatment module; 21. Agricultural waste crushing device; 22. Disinfection device; 23. Second conveying mechanism;

[0042] 3. Powder mixing device;

[0043] 4. Granulation device;

[0044] 5. Drying equipment;

[0045] 6. Screening module; 61. Finished product outlet; 62. Return material outlet;

[0046] 7. Packaging module. Detailed Implementation

[0047] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0048] The existing technology for producing soil conditioners using waste as the main raw material involves: leaching heavy metals from fly ash with acid; thoroughly mixing selected fly ash with calcium-based and potassium-based compounds; granulating the mixture; and then drying it using waste heat from the kiln exhaust gas. After granulation and drying, the mixture is further activated by calcination in a kiln, followed by cooling, ball milling, and molding to obtain the mineral soil conditioner. This technology has a long time required for heavy metal leaching, and the process of calcination, cooling, ball milling, and molding after granulation to obtain the mineral soil conditioner results in a lengthy production cycle.

[0049] To solve the above problems, refer to Figure 1 This invention provides a soil conditioner production system, comprising an inorganic solid waste treatment module 1, an agricultural waste treatment module 2, and a powder mixing device 3. The inorganic solid waste treatment module 1 sequentially includes an inorganic solid waste crushing device 11, a magnetic separation device 12, and a first conveying mechanism 13; the agricultural waste treatment module 2 sequentially includes an agricultural waste crushing device 21, a disinfection device 22, and a second conveying mechanism 23; wherein the outlets of both the first conveying mechanism 13 and the second conveying mechanism 23 are connected to the input end of the powder mixing device 3, forming a continuous production line. The inorganic solid waste treatment module 1 is used to crush inorganic solid waste raw materials and then remove heavy metals by magnetic separation to obtain harmless powder; the agricultural waste treatment module 2 is used to crush agricultural waste and then disinfect it at high temperature to eliminate bacteria and inactivate weed seeds, obtaining organic fertilizer; the powder mixing device 3 is used to mix the organic fertilizer and the harmless powder. The use of inorganic solid waste treatment module 1 enables the removal of heavy metals from inorganic solid waste during the production process of soil conditioner production system, shortening the heavy metal removal time. The design of parallel connection of inorganic solid waste treatment module 1 and agricultural waste treatment module 2 followed by series connection of powder mixing device 3 realizes continuous production of raw material co-processing, while avoiding cross-contamination between heavy metals in inorganic solid waste and bacteria, grass seeds, etc. in agricultural waste.

[0050] Specifically, inorganic solid waste raw materials can be one or more of the following: desulfurized gypsum, phosphogypsum, titanium gypsum, red mud, titanium dioxide slag, metallurgical slag, and fly ash. Metals or metal oxides (such as chromium (Cr), cadmium (Cd), copper (Cu), lead (Pb), and nickel (Ni)) in these industrial slags are easily leached into the soil, causing pollution. Inorganic solid waste raw materials can also be construction waste, such as concrete waste, as well as inorganic porous planting substrates and waste cat litter, which are solid wastes without heavy metal pollution. Agricultural waste raw materials can be plant-based agricultural waste, such as straw, leguminous green manure (such as milkvetch and alfalfa), compost, etc.; animal-based agricultural waste, such as animal manure (such as cow manure and chicken manure), bone meal, fish meal, etc.; and humic agricultural waste, such as humic acid fertilizers (such as potassium humate and fulvic acid), peat, etc. Fermented compost (moisture content ≤40%, humic acid content ≥15%) is preferred, as it can improve the stability and fertilizer efficiency of soil conditioners.

[0051] In some embodiments, the outlet of the powder mixing device 3 is directly connected to a collection device such as a storage silo, packaging bag, or collection bucket, so that the mixed powder is temporarily stored in these collection devices, packaged, and then sold.

[0052] In some embodiments, the inorganic solid waste pulverizing device 11 is selected from any of the following configurations: a. a crusher and a grinder used in series; b. a grinder; the discharge particle size of the inorganic solid waste pulverizing device 11 is less than 1 mm. For example, when the particle size of the inorganic solid waste raw material is greater than 5 mm, a crusher and a grinder used in series are employed. The crusher is used to crush the inorganic solid waste into inorganic solid waste powder with a particle size ≤ 5 mm, and the grinder is used to grind the inorganic solid waste powder crushed by the crusher to a particle size of 80-400 mesh; when the particle size of the inorganic solid waste raw material is ≤ 5 mm, a grinder is used directly to grind the inorganic solid waste powder crushed by the crusher to a particle size of 80-400 mesh. Preferably, the discharge particle size of the inorganic solid waste pulverizing device is 200-400 mesh. More specifically, the discharge particle size of the inorganic solid waste pulverizing device is ≤ 500 mesh. Specifically, the crusher is one or more of the following: jaw crusher, impact crusher, double roll crusher, vertical shaft impact crusher, connected in parallel or in series; the grinding mill is one or more of the following: ball mill, Raymond mill, air jet mill, connected in parallel or in series.

[0053] refer to Figure 2 In some embodiments, the magnetic separator 12 includes:

[0054] The box-shaped main body 121 has a feed inlet 121a at the top and a discharge funnel 121b and at least one waste funnel 121c at the bottom.

[0055] The feeding and spreading device 122 is located below the feeding port 121a and is used to evenly spread the raw materials entering the box-shaped body 121 onto the conveying interface.

[0056] At least one set of transmission separation components 123, including:

[0057] The belt drive mechanism 1231 consists of a strong magnetic roller 1231a, a non-magnetic roller 1231b and a horizontal conveyor belt 1231c. The strong magnetic roller 1231a is located at the discharge end of the horizontal conveyor belt 1231c and is used to adsorb harmful metal impurities in the raw materials.

[0058] The separation guide plate 1232 includes a front guide plate 1232a and a rear guide plate 1232b, which are arranged in an inverted V shape. The tip of the guide plate is located below the axis of the strong magnetic roller 1231a and adjacent to the horizontal conveyor belt 1231c.

[0059] The front guide plate 1232a guides the material discharge hopper 121b to the inlet or above the next horizontal conveyor belt 1231c, and the rear guide plate 1232b guides the waste hopper 121c to the inlet.

[0060] The working principle of the magnetic separator 12 is as follows: First, inorganic solid waste powder containing harmful heavy metals enters the box-shaped body 121 through the feed inlet 121a, and is then evenly spread on the horizontal conveyor belt 1231c by the feeding and spreading device 122. As the horizontal conveyor belt 1231c moves, the inorganic solid waste powder is transported above the strong magnetic roller 1231a. Under the action of the high-intensity magnetic field of the strong magnetic roller 1231a, the harmful heavy metals in the inorganic solid waste powder are tightly adsorbed onto the horizontal conveyor belt 1231c and continue to rotate forward; while the harmless powder that is not adsorbed is thrown forward by the horizontal conveyor belt 1231c. When the harmless powder falls onto the front guide plate 1232a, it is guided by the front guide plate 1232a into the discharge funnel 121b, and finally exits from the discharge funnel. Below 121b, the material enters the next production equipment. After the harmful heavy metals pass over the strong magnetic roller 1231a on the horizontal conveyor belt 1231c, the magnetic field weakens as the harmful heavy metals move further away from the roller. The harmful heavy metals then detach from the horizontal conveyor belt 1231c and fall onto the surface of the rear guide plate 1232b, where they are guided into the waste funnel 121c and finally discharged from the outlet below the waste funnel 121c. This effectively separates harmful heavy metals from harmless powder in inorganic solid waste. The entire impurity removal process of this magnetic separator 12 is fully automated. Harmless powder directly enters the powder mixing device 3 without manual operation, greatly improving production efficiency.

[0061] Specifically, the magnetic field strength of the strong magnetic roller 1231a is between 8000 and 20000 Gs.

[0062] In some optional embodiments, the feeding and spreading device 122 consists of two baffles arranged in a V-shape. The upper ends of these two baffles are installed at the feed inlet 121a, and the lower ends are close to each other, forming a horizontal slit perpendicular to the running direction of the horizontal conveyor belt 1231c. Inorganic solid waste powder entering the box-shaped body 121 must pass through this slit to reach the horizontal conveyor belt 1231c, ensuring that the inorganic solid waste powder is evenly spread on the surface of the horizontal conveyor belt 1231c. This design can prevent the inorganic solid waste powder from accumulating too thickly on the horizontal conveyor belt 1231c (thickness controlled between 0.01 and 1.0 mm), and prevent the strong magnetic roller 1231a from failing to effectively adsorb harmful metal impurities, thereby ensuring that the heavy metal content in the sorted material meets the safety standard (≤10 ppm).

[0063] Furthermore, the length of the baffle is slightly shorter than the width of the horizontal conveyor belt 1231c to ensure that the inorganic solid waste powder completely covers the working surface of the conveyor belt without any side leakage.

[0064] In some optional embodiments, when there are two or more sets of conveying and separating components 123, the sets of conveying and separating components 123 are connected in a stepped manner. That is, the front guide plate 1232a of the previous conveying and separating component 123 guides the material to the horizontal conveyor belt 1231c of the next conveying and separating component 123 for secondary sorting. The finally purified material is introduced into the discharge funnel 121b by the front guide plate 1232a of the final conveying and separating component 123. Through the multi-stage sorting mechanism, the removal rate of harmful heavy metals can be increased from 93% in a single stage to over 99%, significantly improving product safety. Specifically, the magnetic separator 12 includes 1 to 4 sets of conveying and separating components 123, which can be selected according to the heavy metal separation effect. For example, when the magnetic separator 12 includes 1 set of conveying and separating components 123, 93% of heavy metals can be removed; when the magnetic separator 12 includes 2 sets of conveying and separating components 123, 98% of heavy metals can be removed; when the magnetic separator 12 includes 3 sets of conveying and separating components 123, 99.5% of heavy metals can be removed.

[0065] In some embodiments, the agricultural waste crushing device 21 is a blade crusher used to crush agricultural waste to a length ≤5mm. Crushing agricultural waste to a length ≤5mm facilitates high-temperature sterilization of the agricultural waste and mixing with harmless powder separated from inorganic solid waste powder.

[0066] In some embodiments, the disinfection device 22 is one or a combination of a high-temperature physical disinfection device, a chemical disinfection device, or both. The high-temperature physical disinfection device may employ, for example, an electromagnetic heating-infrared composite device, using an electromagnetic heating plate (temperature up to 150°C) and an infrared light source in synergy to penetrate materials through dual thermal radiation, killing pathogens and insect eggs. The chemical disinfection device employs an ozone generation system that generates ozone (O3) using low-pressure electrolysis, and sprays ozone water onto the surface of waste through a gas-liquid mixing device; or it may employ a chemical atomization disinfection chamber, with multi-directional spray heads installed within a closed chamber to spray hydrogen peroxide or quaternary ammonium salt disinfectants.

[0067] In some embodiments, the powder mixing device 3 includes one or more of a mixer, a twin-blade mixer, a double-boiler mixer, and a ball mill mixer.

[0068] In some embodiments, the soil conditioner production system further includes a granulation device 4, whose input end is connected to the outlet of the powder mixing device 3, for granulating the mixed powder. Integrating the granulation device 4 into the soil conditioner production system allows the mixed powder to be granulated for use or sale. Specifically, the granulation device 4 is one of a disc granulator, a roller granulator, or an extrusion granulator. In the granulation device 4, water is sprayed into the mixed powder and a binder is added to form soil conditioner granules, thereby achieving a slow release of the soil conditioner's fertility.

[0069] In some embodiments, the soil conditioner production system further includes a drying device 5, the input of which is connected to the outlet of the granulation device 4, configured to dehydrate and dry the formed granules. The drying device 5 uses natural ventilation or a dryer to dehydrate and dry the water-containing granules. When the granules are dried using a dryer, the moisture evaporation time can be shortened, thereby improving the production efficiency of the soil conditioner.

[0070] In some embodiments, the soil conditioner production system further includes a screening module 6 and a packaging module 7. The input end of the screening module 6 is connected to the outlet of the drying equipment 5, and is configured to separate the material into coarse particles, medium particles, fine particles, and substandard powder through a three-stage gradient screening process, wherein:

[0071] First-stage screen: 2.8mm aperture, intercepts coarse particles with a diameter ≥ 2.8mm;

[0072] Second-stage screen: 1.6mm aperture, intercepting medium-sized particles with a diameter of 1.6-2.8mm;

[0073] Third-stage screen: 0.5mm aperture, intercepting fine particulate products with a particle size of 0.5-1.6mm;

[0074] Substandard powder: Unformed material with a particle size <0.5mm.

[0075] The screening module 6 is provided with a finished product outlet 61 and a return material outlet 62, wherein coarse particles, medium particles and fine particles are conveyed to the packaging module 7 through the finished product outlet 61.

[0076] The packaging module 7 is configured as follows:

[0077] Individual packaging mode: Coarse, medium, and fine particle products are introduced into separate packaging lines for sealing and packaging;

[0078] Mixed packaging mode: After mixing coarse, medium and fine particles in a preset ratio through a metering unit, the mixture is packaged in an integrated manner.

[0079] In some embodiments, the return outlet 62 is connected to the input end of the granulation device 4 to form a continuous production line. This configuration allows substandard powder with a particle size <0.5mm to re-enter the granulation device 4 through the return outlet 62 for granulation, avoiding raw material waste.

[0080] It should be noted that in the description of this utility model, the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0081] It should be noted that in this invention, 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.

[0082] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A soil conditioner production system, characterized in that, include: The inorganic solid waste treatment module (1) includes, in sequence, an inorganic solid waste crushing device (11), a magnetic separation device (12), and a first conveying mechanism (13); The agricultural waste treatment module (2) includes, in sequence, an agricultural waste crushing device (21), a disinfection device (22), and a second conveying mechanism (23); The powder mixing device (3) has its outlets connected to the input end of the powder mixing device (3) via the outlets of the first conveying mechanism (13) and the second conveying mechanism (23), forming a continuous production line.

2. The soil conditioner production system according to claim 1, characterized in that, The inorganic solid waste pulverizing device (11) is selected from any of the following configurations: (a) Crusher and grinder used in series; (b) Grinding machine.

3. The soil conditioner production system according to claim 2, characterized in that, The crusher is one or more of the following: jaw crusher, impact crusher, double roll crusher, and vertical shaft impact crusher, connected in parallel or in series. The grinding mill is one or more of the following: ball mill, Raymond mill, and air jet mill, connected in parallel or in series.

4. The soil conditioner production system according to claim 1, characterized in that, The magnetic separation device (12) includes: The box-shaped main body (121) has a feed inlet (121a) at the top and a discharge funnel (121b) and at least one waste funnel (121c) at the bottom; The feeding and spreading device (122) is located below the feeding port (121a) and is used to spread the raw materials entering the box-shaped body (121) evenly to the conveying interface. At least one set of transmission separation components (123), including: The belt drive mechanism (1231) consists of a strong magnetic roller (1231a), a non-magnetic roller (1231b) and a horizontal conveyor belt (1231c). The strong magnetic roller (1231a) is located at the discharge end of the horizontal conveyor belt (1231c) and is used to adsorb harmful metal impurities in the raw materials. The separation guide plate (1232) includes a front guide plate (1232a) and a rear guide plate (1232b), which are arranged in an inverted V shape, with their tips located below the axis of the strong magnetic roller (1231a) and adjacent to the horizontal conveyor belt (1231c). The front guide plate (1232a) guides the material to the inlet of the discharge hopper (121b) or above the next horizontal conveyor belt (1231c), and the rear guide plate (1232b) guides the material to the inlet of the waste hopper (121c).

5. The soil conditioner production system according to claim 1, characterized in that, The agricultural waste crushing device (21) is a blade crusher.

6. The soil conditioner production system according to claim 1, characterized in that, The disinfection device (22) is one of the high-temperature physical disinfection device, the chemical disinfection device, or a combination of both.

7. The soil conditioner production system according to claim 1, characterized in that, The soil conditioner production system also includes: The granulation device (4) has its input end connected to the outlet of the powder mixing device (3) and is used for mixing powder for granulation.

8. The soil conditioner production system according to claim 7, characterized in that, The soil conditioner production system also includes: The drying equipment (5) has its input end connected to the outlet of the granulation device (4) and is used to dehydrate and dry the formed granules.

9. The soil conditioner production system according to claim 8, characterized in that, The soil conditioner production system also includes: The screening module (6) is connected to the outlet of the drying equipment (5) through a three-stage gradient screening to separate the material into coarse particles, medium particles, fine particles and substandard powder; the screening module (6) includes a finished product outlet (61) and a return material outlet (62); The packaging module (7) has its input end connected to the finished product outlet (61) and is used for individual or mixed packaging of coarse, medium and fine particles.

10. The soil conditioner production system according to claim 9, characterized in that, The return material outlet (62) is connected to the input end of the granulation device (4) to form a continuous production line.

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