Organic feed additive preparation system

Abstract

This utility model discloses an organic feed additive preparation system, which includes: a pulverizer 1, a double-layer screening and dewatering drum screen 2, a solid-liquid separation device 3, a mixer 4, a fermentation tank 5, a dryer 6, a first transmission device A disposed between the pulverizer 1 and the double-layer screening and dewatering drum screen 2, a second transmission device B disposed between the double-layer screening and dewatering drum screen 2 and the solid-liquid separation device 3, a third transmission device C disposed between the solid-liquid separation device and the mixer 4, a fourth transmission device D disposed between the mixer 4 and the fermentation tank 5, a fifth transmission device E disposed between the fermentation tank 5 and the dryer 6, and a discharge transmission device F disposed at the end of the dryer 6, wherein the pulverizer 1 is provided with a feed transmission device G at its front end.

Description

Technical fields:

[0001] This utility model relates to the field of feed processing technology, and specifically to an organic feed additive preparation system. Background technology:

[0002] Currently, kitchen waste is considered solid waste. It has a complex composition, high water content, and is easily perishable and prone to bacterial growth. This substance is rich in organic matter such as protein, fat, and carbohydrates, making it a good feed supplement.

[0003] After dehydration and wastewater treatment, the solid residue from the extraction of waste cooking oil is typically incinerated or landfilled, resulting in resource waste and the risk of secondary pollution. Composting or biodegradation has a long cycle, and the materials contain salt, rendering them economically worthless. Some waste is sorted and then anaerobically converted into biogas for power generation or methanol synthesis, but the resulting biogas slurry and residue still require treatment. Others use waste slurry for protein conversion (breeding black soldier flies, fly larvae, etc.), but this process requires a large area, has a long cycle, and produces high concentrations of odorous gases. The national "Regulations on the Management of Food Waste" and "Feed Hygiene Standard" (GB13078-2017) prohibit the direct feeding of food as a substitute for animal feed, as this poses significant health and safety risks. Therefore, all of the above processes have varying degrees of shortcomings.

[0004] Chinese patent application CN 111972542 A discloses a formula, preparation process, and processing system for producing feed from kitchen waste, relating to the field of kitchen waste resource utilization technology. The formula for producing feed from kitchen waste includes the following components: kitchen waste, corn, wheat bran, rice bran, and additives. This formula optimizes the resource utilization of kitchen waste and has good practicality. Furthermore, this invention proposes a preparation process for producing feed from kitchen waste, which effectively improves the utilization rate of kitchen waste and enables the produced feed to meet poultry farming standards. Additionally, this invention proposes a processing system for producing feed from kitchen waste, including a storage silo, a dryer, a high-temperature sterilizer, a crusher, a mixing device, a fermentation chamber, a drying machine, a feed pellet mill, and a packaging machine, with a conveying mechanism between the feed pellet mills. This invention's preparation system operates as an integrated assembly line, making feed production faster and enabling large-scale production.

[0005] However, the aforementioned patents involve manual sorting of kitchen waste, which is not only inefficient but also creates a harsh environment and can easily affect health. Secondly, the selection criteria for kitchen waste are stringent and not applicable to most types of kitchen waste. Furthermore, the selected kitchen waste is directly dried, sterilized, and then stirred and fermented. The fermentation time varies depending on the size of the kitchen waste, making it difficult to guarantee that each batch of finished feed will meet the requirements.

[0006] In view of the above, the inventors propose the following technical solution. Utility Model Content:

[0007] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an organic feed additive preparation system.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an organic feed additive preparation system, comprising: a pulverizing and pulping machine, a double-layer screening and dewatering drum screen, a solid-liquid separation device, a mixer, a fermentation tank, a dryer, a first transmission device disposed between the pulverizing and pulping machine and the double-layer screening and dewatering drum screen, a second transmission device disposed between the double-layer screening and dewatering drum screen and the solid-liquid separation device, a third transmission device disposed between the solid-liquid separation device and the mixer, a fourth transmission device disposed between the mixer and the fermentation tank, a fifth transmission device disposed between the fermentation tank and the dryer, and a discharge transmission device disposed at the end of the dryer, wherein the front end of the pulverizing and pulping machine is provided with a feed transmission device.

[0009] Furthermore, in the above technical solution, the double-layer screening and dewatering drum screen is inclined, wherein the high end and the low end of the double-layer screening and dewatering drum screen are respectively connected to the end of the second transmission device and the beginning of the third transmission device, and a water collection tank is provided below the double-layer screening and dewatering drum screen.

[0010] Furthermore, in the above technical solution, the double-layer screening and dewatering drum screen is also equipped with a discharge screen for separating non-organic materials.

[0011] Furthermore, in the above technical solution, the solid-liquid separation device includes a shell, a main shaft rotatably disposed within the shell, multiple guide plates circumferentially spaced on the main shaft, multiple brushes circumferentially disposed on the main shaft and alternately distributed with the guide plates, a double-layer screen disposed around the brushes, an oil-water separation tank disposed in the front half of the double-layer screen, a drying coil disposed in the rear half of the double-layer screen, and a motor for driving the main shaft to rotate. One end of the shell is provided with a feed inlet extending into the double-layer screen, and one end of the feed inlet is provided with a high-frequency vibration device in contact with the double-layer screen. The other end of the shell is provided with a slag discharge port.

[0012] Furthermore, in the above technical solution, a vibration-damping spring is provided between the double-layer screen and the inner wall of the outer shell, and the distance between the double-layer screen and the inner wall of the outer shell is 100mm.

[0013] Furthermore, in the above technical solution, the double-layer screen includes an 800-mesh inner screen and a 2mm perforated outer screen. Both the inner and outer screens are provided with an upper half and a lower half, and a connecting support is provided between the upper half and the lower half. This connecting support is connected to the anti-vibration spring.

[0014] Furthermore, in the above technical solution, the outer shell includes an openable bottom shell and a top cover, wherein the feed inlet is located on the top cover, the slag discharge outlet is located on the bottom shell, the oil-water separation tank is located at one end of the bottom shell, and the bottom shell is inclined from the slag discharge outlet end toward the oil-water separation tank end.

[0015] Furthermore, in the above technical solution, one end of the bottom shell is provided with a baffle to prevent liquid from flowing back to the slag discharge port. The baffle is located below the end of the double-layer screen and is inclined towards the slag discharge port at the end of the double-layer screen.

[0016] Furthermore, in the above technical solution, the feeding conveying device, the first conveying device, the second conveying device, the third conveying device, the fourth conveying device, the fifth conveying device, and the discharging conveying device are all inclined spiral feeding devices, and the feeding end of the spiral feeding device is located below the previous process, and the discharging end of the spiral feeding device is located above the next process.

[0017] Furthermore, in the above technical solution, both the fermentation tank and the dryer are equipped with exhaust ports.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: In the present invention, the feeding conveying device first automatically feeds the kitchen waste into the crushing and pulping machine. After the crushing and pulping machine crushes the kitchen waste into slurry, the first conveying device conveys the slurry to the double-layer screening and dewatering drum screen. After the double-layer screening and dewatering drum screen drains and filters the slurry, the second conveying device feeds the slurry into the solid-liquid separation device. After the solid-liquid separation device dewaters, dries and sterilizes the slurry, the third conveying device feeds the slurry into the mixer. After other auxiliary materials are added to the mixer and mixed evenly, the fourth conveying device feeds the slurry into the fermentation tank. The slurry is fermented by adding compound bacteria. Then, the fifth conveying device feeds the slurry into the dryer for drying. Finally, the finished feed is sent out through the discharge conveying device, thus completing the processing of kitchen waste into feed. In this process, the kitchen waste is pulverized into a slurry through a double-layer screening and dewatering drum screen for filtration. The double-layer screen can directly discharge large particles of non-organic matter and also drain the slurry, thus eliminating the need for manual separation of kitchen waste. Attached image description:

[0019] Figure 1 This is a schematic diagram of the present invention;

[0020] Figure 2 This is a perspective view of the solid-liquid separation device in this utility model;

[0021] Figure 3 This is a cross-sectional view of the solid-liquid separation device of this utility model. Figure 1 ;

[0022] Figure 4 This is a cross-sectional view of the solid-liquid separation device of this utility model. Figure 2 ;

[0023] Figure 5 This is a schematic diagram of the structure of the double-layer screen in this utility model. Detailed implementation method:

[0024] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0025] See Figures 1 to 5 As shown, an organic feed additive preparation system includes: a pulverizer 1, a double-layer screening and dewatering drum screen 2, a solid-liquid separation device 3, a mixer 4, a fermentation tank 5, a dryer 6, a first transmission device A disposed between the pulverizer 1 and the double-layer screening and dewatering drum screen 2, a second transmission device B disposed between the double-layer screening and dewatering drum screen 2 and the solid-liquid separation device 3, a third transmission device C disposed between the solid-liquid separation device and the mixer 4, a fourth transmission device D disposed between the mixer 4 and the fermentation tank 5, a fifth transmission device E disposed between the fermentation tank 5 and the dryer 6, and a discharge transmission device F disposed at the end of the dryer 6, wherein the pulverizer 1 is provided with a feed transmission device G at its front end. The process begins with an automatic feeding conveyor G feeding kitchen waste into a pulverizer 1. The pulverizer 1 crushes the kitchen waste into a slurry, which is then conveyed by a first conveyor A to a double-layer screening and dewatering drum screen 2. After the slurry is filtered and drained by the double-layer screening and dewatering drum screen 2, a second conveyor B feeds the slurry into a solid-liquid separation device 3. The solid-liquid separation device 3 dewaters, dries, and sterilizes the slurry. A third conveyor C feeds the slurry into a mixer 4, where other auxiliary materials are added and mixed evenly. A fourth conveyor D feeds the slurry into a fermentation tank 5, where compound microbial cultures are added for fermentation. A fifth conveyor F feeds the slurry into a dryer 6 for drying. Finally, a discharge conveyor F delivers the finished feed, thus completing the process of turning kitchen waste into animal feed. In this process, the kitchen waste is pulverized into a slurry and filtered through a double-layer screening and dewatering drum screen 2. The double-layer screen can directly discharge large particles of non-organic matter and also drain the slurry, thus eliminating the need for manual separation of kitchen waste.

[0026] The double-layer screening and dewatering drum screen 2 is inclined, with its high and low ends respectively connected to the end of the second transmission device B and the beginning of the third transmission device C. A water collection tank 20 is provided below the double-layer screening and dewatering drum screen 2. A discharge screen 21 for separating non-organic materials is also provided inside the double-layer screening and dewatering drum screen 2. The water collection tank 20 below the double-layer screening and dewatering drum screen 2 collects the drained water, and the discharge screen 21 directly discharges non-organic materials (plastics, metals, glass), bones, shells, coarse fibers, etc., removed from the inner layer of the screening material, retaining only high-protein organic matter.

[0027] The solid-liquid separation device 3 includes a housing 31, a main shaft 32 rotatably disposed within the housing 31, multiple guide plates 33 circumferentially spaced on the main shaft 32, multiple brushes 34 circumferentially disposed on the main shaft 32 and alternately distributed with the guide plates 33, a double-layer screen 35 disposed around the brushes 34, an oil-water separation tank 36 disposed in the front half of the double-layer screen 35, a drying coil 37 disposed in the rear half of the double-layer screen 35, and a motor 38 for driving the main shaft 32 to rotate. One end of the housing 31 is provided with a feed inlet 311 extending into the double-layer screen 35, and one end of the feed inlet 311 is provided with a high-frequency vibration device 7 in contact with the double-layer screen 35. The other end of the housing 31 is provided with a slag discharge port 312.

[0028] A vibration damping spring 39 is provided between the double-layer screen 35 and the inner wall of the outer shell 31, and the distance between the double-layer screen 35 and the inner wall of the outer shell 31 is 100mm.

[0029] The double-layer screen 35 includes an inner screen 351 with an 800-mesh mesh and an outer screen 352 with 2mm perforations. Both the inner screen 351 and the outer screen 352 are provided with an upper half and a lower half, and a connecting support 353 is provided between the upper half and the lower half. The connecting support 353 is connected to the anti-vibration spring 39.

[0030] The outer shell 31 includes an openable bottom shell 31A and an upper cover 31B, wherein the feed inlet 311 is located on the upper cover 31B, the slag discharge outlet 312 is located on the bottom shell 31A, and the oil-water separation tank 36 is disposed at one end of the bottom shell 31A, and the bottom shell 31A is inclined from the slag discharge outlet 312 end toward the oil-water separation tank 36 end.

[0031] One end of the bottom shell 31A is provided with a baffle 313 for preventing liquid backflow to the slag discharge port 312. The baffle 313 is located below the end of the double-layer screen 35 and is inclined towards the slag discharge port 312 at the end of the double-layer screen 35.

[0032] The main shaft 32 is provided with six support members 321 radiating outwards. Among them, three support members 321 are provided with brushes 34, and three support members 321 are provided with guide plates 33. The guide plates 33 are arranged at an angle of 15° to the main shaft 32.

[0033] The brush 34 is a 304 stainless steel brush, and the guide plate 33 is a Teflon guide plate; the upper end of the oil-water separation tank 36 is provided with an oil outlet, and the lower end of the oil-water separation tank 36 is provided with a drain outlet.

[0034] The main shaft 32 includes a detachable front section 32A and a rear section 32B. The guide plate 33 on the front section 32A and the guide plate 33 and brush 34 on the rear section 32B are all misaligned.

[0035] The drying coil 37 is disposed on the outer wall of the housing 31 and located on the rear section 32B side of the main shaft 32. The housing 31 is made of 430 ferritic stainless steel and is also provided with an exhaust outlet 314 connected to the exhaust gas treatment system.

[0036] The feeding conveyor G, the first conveyor A, the second conveyor B, the third conveyor C, the fourth conveyor D, the fifth conveyor E, and the discharging conveyor F are all inclined spiral feeding devices, with the feeding end of the spiral feeding device located below the previous process and the discharging end located above the next process. Both the fermentation tank 5 and the dryer 6 are equipped with exhaust ports.

[0037] In summary, this utility model uses kitchen waste as raw material to prepare high-protein organic feed. Kitchen waste is rich in protein, fat and carbohydrates, which can replace the raw materials of traditional feed, greatly reduce the production cost of feed, improve the utilization rate of organic waste protein, and conform to the concept of "zero waste city" and circular economy.

[0038] Compared to other treatment methods, this invention better meets current market demands, reduces carbon emissions, and contributes to the "dual carbon" goal (carbon reduction, carbon emission reduction, and carbon neutrality). By treating kitchen waste and extracting organic matter, this method reduces livestock costs and decreases reliance on high-priced protein. Proper treatment of kitchen waste reduces food safety issues such as "swill pigs" (pigs fed with swill), preventing diseases like African swine fever and foot-and-mouth disease. The system generates a certain amount of waste oil during processing, which is sold to qualified processing companies for further processing, preventing waste oil (gutter oil) from returning to the dining table. Using this system saves resources, protects the environment, and generates significant economic benefits.

[0039] Specifically, it includes the following steps:

[0040] 1. First, put the kitchen waste into the crusher and pulper 1 for crushing and pulping. Add an appropriate amount of water during pulping to reduce the salt and oil content in the material.

[0041] 2. The slurry is then conveyed by the first conveying device A to the double-layer screening and dewatering drum screen 2 for sorting. The inner layer screen removes non-organic substances (plastics, metals, glass) as well as bones, shells, coarse fibers, etc. from the material. The non-organic substances (plastics, metals, glass) as well as bones, shells, coarse fibers, etc. generated during sorting are recycled or landfilled. The slurry sorted by the outer drum has a high water content (about 80%).

[0042] 3. The slurry with high water content is fed into the solid-liquid separation device 3 by the second transmission device B. This device is designed as an integrated dewatering and drying unit. After sorting and impurity removal, the slurry enters the front end of the device for solid-liquid separation. The outer shell 31 of the device is made of 430 ferritic stainless steel, which has the characteristics of high temperature resistance, corrosion resistance, and high magnetic permeability. The device has a main shaft 23 inside, one end of which is connected to the power motor 38 and the other end is connected to the fixed bearing. An exhaust port 314 is set up, and the exhaust gas enters the exhaust gas treatment system for purification. The other end is equipped with a rotating main shaft support kit. Six support members 321 are distributed on the main shaft 32, three of which are brush support members and three are guide plate support members. The three support members 321 are distributed alternately. The brush support members are equipped with 304 stainless steel brushes 34, and the guide plate support members are equipped with Teflon guide plates 33. The guide plates 33 are at an angle of ∠15° to the main shaft 32. The solid-liquid separation device 3 has a double-layer screen 35 inside its cavity. The distance between the double-layer screen 35 and the inner wall is 100mm. The outer layer is made of 304 stainless steel 2mm perforated screen to prevent damage when the screen is subjected to external impact. The inner layer is made of 316 stainless steel 800-mesh screen to trap small particles and achieve efficient solid-liquid separation. The inner screen is fixed to the outer perforated screen wall by 304 stainless steel flat pressure strips. The smooth double-layer screen 35 ensures smooth operation of rotating parts. The inner screen is in close contact with the brush 34 and the guide plate 33. The device achieves screen cleaning and material orientation. The double-layer screen 35 is designed with two semi-cylindrical structures for easy replacement and maintenance. The double-layer screen 35 is connected to the inner wall of the device with connecting support parts 353. Anti-vibration springs 39 are installed between the connecting support parts 353 to prevent large vibrations during equipment operation and reduce the noise level. A high-frequency vibration device 7 is installed on the sealing wall 354 of the double-layer screen 35 at the feeding end to promote irregular movement of the material, thereby increasing the material dehydration and filtration area and the material drying and heating area. The device has a feed inlet 311 at one end and a slag discharge outlet 312 at the other end. An oil-water separation tank 36 is located at the bottom of the device. The liquid phase in the oil-water separation tank 36 is affected by the drying temperature and maintains a certain temperature to prevent the oil from solidifying and emulsifying. The resulting waste kitchen oil is sold to qualified units for recycling. The oil-water separator 36 has an oil outlet at the top and a drain outlet at the bottom; the upper part of the dehydration part of the device can be disassembled in sections to replace the perforated screen and sieve inside the chamber.

[0043] 4. The first half of the solid-liquid separation device 3 completes dehydration, and the second half performs drying. The second half uses electromagnetic heating, converting electrical energy into heat energy through electromagnetic induction. Multiple turns of drying coils 37 (electromagnetic wires) surround the outer shell of the device. The two ends of the electromagnetic wires are connected to an electromagnetic heater controller. The controller outputs alternating current, generating an alternating magnetic field around the electromagnetic wires. This alternating magnetic field induces currents (eddy currents) within the high-permeability material (430 ferritic stainless steel), generating heat under the influence of the conductor's resistance, thus providing a heat source for drying the material. This heating method achieves a thermal efficiency of 90%, saving 30% of energy compared to traditional resistance heating. Temperature control accuracy reaches ±1℃, featuring rapid, efficient, energy-saving, environmentally friendly, clean, safe, and intelligent operation. The drying temperature is controlled at approximately 120℃, effectively killing pathogens (Salmonella, E. coli, etc.), and the moisture content of the dried material is controlled at approximately 50%. The upper half of this outer shell can be disassembled in sections, and the electromagnetic wires have movable interfaces for replacing the perforated mesh and screen inside the chamber.

[0044] 5. After sterilization, the slurry is conveyed by the second conveyor device B into mixer 4 for mixing. During mixing, auxiliary materials are added to adjust the nutritional balance. A certain proportion of soybean meal or rapeseed meal is added, with the addition amount controlled at about 15%, to increase the protein content of the material; a certain proportion of corn flour or wheat bran and other carbohydrates are added, with the addition amount controlled at about 30%, to supplement the energy of the material; a certain proportion of meat and bone meal, yeast protein, vitamins, minerals and other additives are added. After the auxiliary materials and additives are added, they are mixed evenly, and the moisture content is controlled at about 50%.

[0045] 6. After the slurry is uniformly mixed, it is conveyed into fermentation tank 5 by the third transmission device C. Fermentation tank 5 adopts a double-layer water bath and stirring design. The material in the stirring tank 5 is fermented with compound bacteria. The ratio of compound bacteria (FQ-3 eukaryotic yeast + Bacillus) is: 0.05% FQ-3 eukaryotic yeast + 0.1% Bacillus. The amount of compound bacteria added is 300g / ton. After the compound bacteria are added, the material is turned over once every 2 hours. The temperature is controlled at 33℃±2℃. The fermentation time is generally greater than 48 hours to increase the protein content and degrade anti-nutritional factors.

[0046] 7. After the slurry fermentation is completed, it is dried in dryer 6 to control the moisture content to below 12%. It is then packaged in double-layer sealed woven bags. An appropriate amount of antifungal agent, calcium propionate, is added to the material. It is then stored in a cool and dry finished product warehouse for sale.

[0047] 8. All waste gas generated during the drying process, the waste gas generated by the integrated protein extraction treatment device, and the waste gas generated by the fermentation tank are put into the waste gas treatment system. After being purified by acid spraying, alkali spraying, gas washing, biological filter, induced draft fan and exhaust stack, the waste gas is discharged in compliance with standards.

[0048] 9. This product is suitable for use in feed for non-ruminant animals (poultry, pigs, fish, etc.) and can also be used as an adjunct to traditional feeds depending on its nutritional composition.

[0049] 10. According to the test report, the feed meets the national standards for protein feed: crude protein 47.2%, moisture 11.2%, crude fat 4.1%, crude fiber 6.3%, ash 8.5%, calcium 1.5%, and phosphorus 1.26%. It also meets the standards of the "Feed Hygiene Standard" (GB13078-2017): aflatoxin B1 8.3 μg / kg, Salmonella not detected, and lead 1.5 mg / kg.

[0050] 11. The proportion of compound microbial strains can be adjusted according to the different proportions of feed additives (e.g., when the amount of bran added increases, the amount of FQ-3 eukaryotic yeast added should be increased to promote fiber decomposition; increasing the amount of Bacillus can improve protein utilization). Other additives can also be added to improve the quality of the material (e.g., adding appropriate amounts of fish meal, meat and bone meal, blood meal, β-glucan, etc. can promote animal growth, improve intestinal health, and enhance immunity).

[0051] 12. This production process not only solves the problem of resource utilization of protein-containing organic waste, but also saves a lot of agricultural products, which is in line with the relevant national policies and the goals of energy conservation and carbon reduction.

[0052] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. An organic feed additive preparation system, characterized in that, include: The equipment includes a pulverizer (1), a double-layer screening and dewatering drum screen (2), a solid-liquid separation device (3), a mixer (4), a fermentation tank (5), a dryer (6), a first transmission device (A) between the pulverizer (1) and the double-layer screening and dewatering drum screen (2), a second transmission device (B) between the double-layer screening and dewatering drum screen (2) and the solid-liquid separation device (3), a third transmission device (C) between the solid-liquid separation device and the mixer (4), a fourth transmission device (D) between the mixer (4) and the fermentation tank (5), a fifth transmission device (E) between the fermentation tank (5) and the dryer (6), and a discharge transmission device (F) at the end of the dryer (6), wherein the pulverizer (1) is provided with a feed transmission device (G) at the front end.

2. The organic feed additive preparation system according to claim 1, characterized in that: The double-layer screening and dewatering drum screen (2) is inclined, wherein the high end and the low end of the double-layer screening and dewatering drum screen (2) are respectively connected to the end of the second transmission device (B) and the beginning of the third transmission device (C), and a water collection tank (20) is provided below the double-layer screening and dewatering drum screen (2).

3. The organic feed additive preparation system according to claim 2, characterized in that: The double-layer screening and dewatering drum screen (2) is also equipped with a discharge screen (21) for separating non-organic matter.

4. The organic feed additive preparation system according to claim 1, characterized in that: The solid-liquid separation device (3) includes a housing (31), a main shaft (32) rotatably disposed inside the housing (31), multiple guide plates (33) circumferentially spaced on the main shaft (32), multiple brushes (34) circumferentially disposed on the main shaft (32) and alternately distributed with the guide plates (33), a double-layer screen (35) disposed around the brushes (34), an oil-water separation tank (36) disposed in the front half of the double-layer screen (35), a drying coil (37) disposed in the rear half of the double-layer screen (35), and a motor (38) for driving the main shaft (32) to rotate. One end of the housing (31) is provided with a feed inlet (311) extending into the double-layer screen (35), and one end of the feed inlet (311) is provided with a high-frequency vibration device (7) in contact with the double-layer screen (35). The other end of the housing (31) is provided with a slag discharge port (312).

5. The organic feed additive preparation system according to claim 4, characterized in that: A vibration damping spring (39) is provided between the double-layer screen (35) and the inner wall of the outer shell (31), and the distance between the double-layer screen (35) and the inner wall of the outer shell (31) is 100mm.

6. The organic feed additive preparation system according to claim 4, characterized in that: The double-layer screen (35) includes an 800-mesh inner screen (351) and a 2mm perforated outer screen (352). Both the inner screen (351) and the outer screen (352) are provided with an upper part and a lower part, and a connecting support (353) is provided between the upper part and the lower part. The connecting support (353) is connected to the anti-vibration spring (39).

7. The organic feed additive preparation system according to claim 6, characterized in that: The outer shell (31) includes an openable bottom shell (31A) and a top cover (31B), wherein the feed inlet (311) is located on the top cover (31B), the slag discharge outlet (312) is located on the bottom shell (31A), and the oil-water separation tank (36) is located at one end of the bottom shell (31A), and the bottom shell (31A) is inclined from the slag discharge outlet (312) end toward the oil-water separation tank (36).

8. The organic feed additive preparation system according to claim 7, characterized in that: One end of the bottom shell (31A) is provided with a baffle (313) to prevent liquid from flowing back to the slag discharge port (312). The baffle (313) is located below the end of the double-layer screen (35) and is inclined towards the slag discharge port (312) at the end of the double-layer screen (35).

9. An organic feed additive preparation system according to any one of claims 1-8, characterized in that: The feeding conveyor (G), the first conveyor (A), the second conveyor (B), the third conveyor (C), the fourth conveyor (D), the fifth conveyor (E), and the discharging conveyor (F) are all inclined spiral feeding devices, with the feeding end of the spiral feeding device located below the previous process and the discharging end of the spiral feeding device located above the next process.

10. An organic feed additive preparation system according to claim 9, characterized in that: Both the fermenter (5) and the dryer (6) are equipped with exhaust ports.

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