Straw agricultural film separation integrated system

Abstract

The utility model provides a straw agricultural film separation integrated system, which comprises a separation bin, a separation bin, an air outlet, a feeding port, a discharging port, a feeding port, a film separation bin, a film separation bin, a film separation bin, a film separation bin and a film separation bin, and is characterized in that the top end of the separation bin is provided with a feeding port and an air outlet; the crushing device is arranged at the feeding hole; the side wall, between the discharging port and the air outlet, of the separation bin is a material guiding wall, and the height of the material guiding wall is gradually increased in the direction facing the air outlet. A winnowing channel is formed between the material guide wall and the pulverizator, the pulverizator comprises an air blocking part which partially blocks the winnowing channel, and the section of the winnowing channel between the air blocking part and the material guide wall is narrowed, so that a secondary separation cavity is formed in the winnowing channel between the air blocking part and the air outlet. The device has the effect of improving the separation efficiency of agricultural films in straws.

Description

Technical Field

[0001] The utility model relates to the technical field of straw processing equipment, in particular to a complete set of straw and agricultural film separation system. Background Art

[0002] Straw is the general term for the stems and leaves (ears) of mature crops, and is the remaining part of some crops after the seeds are harvested. More than half of the products of crop photosynthesis are present in straw. Straw is rich in nitrogen, phosphorus, potassium, calcium, magnesium and organic matter, and is a multi-purpose renewable biological resource. Straw is also an important and indispensable animal roughage, especially for the feeding of herbivorous animals.

[0003] When processing straw into feed, it needs to be purified first. Traditional debris such as soil and rocks can be easily processed using existing equipment. However, with the development of modern agriculture, the use of agricultural film is increasing. Straw collected from plots covered with agricultural film will be mixed with a large amount of agricultural film. If the agricultural film is eaten by animals, it will be entangled in the stomach to form clumps, inhibiting digestion and not easy to be excreted. Especially for ruminants, it is more likely to accumulate in their stomachs, affecting digestion, and even causing animal death in severe cases. Therefore, if the agricultural film cannot be effectively separated from the straw, the straw mixed with agricultural film cannot be used as feed.

[0004] Because agricultural film is easily entangled with straw and the amount mixed in is large, it is difficult to handle with existing equipment. Therefore, in order to reduce resource waste and increase feed sources, some farmers will use manual removal of agricultural film to obtain some straw that can be used as feed. However, the manual removal of agricultural film is inefficient, resulting in the benefits of making feed from straw after separating the agricultural film far lower than the cost of manual input, making it difficult to form large-scale production, seriously affecting the recycling of straw and causing a large amount of resource waste. Utility Model Content

[0005] In view of this, the utility model aims to provide a complete system for separating agricultural films from straws to improve the efficiency of separating agricultural films from straws.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A complete system for separating straw and agricultural film, comprising:

[0008] A separation bin, wherein the top of the separation bin is provided with a feed inlet and an air outlet, and the bottom is provided with a discharge port, and the discharge port also serves as an air inlet;

[0009] A pulverizer, the pulverizer being arranged at the feed inlet;

[0010] The side wall of the separation bin between the material outlet and the air outlet is a material guide wall, and the height of the material guide wall gradually increases in the direction toward the air outlet;

[0011] An air selection channel is formed between the material guide wall and the pulverizer. The pulverizer includes an air blocking portion that partially blocks the air selection channel. The cross-section of the air selection channel is narrowed between the air blocking portion and the material guide wall, so that the air selection channel between the air blocking portion and the air outlet forms a secondary separation chamber.

[0012] Furthermore, an air outlet is respectively provided at the top of the separation bin and at both sides of the pulverizer, and each of the air outlets is correspondingly provided with a material guiding wall and a wind blocking portion.

[0013] Furthermore, the pulverizer also includes:

[0014] A casing, wherein the casing is provided with a feeding port and a discharging port, and the discharging port is connected to the feeding port;

[0015] A rotating frame, the rotating frame is rotatably connected in the housing;

[0016] A crushing hammer, the crushing hammer is rotatably connected to the rotary frame, and a plurality of crushing hammers are evenly distributed along the circumference of the rotary frame;

[0017] A screen is arranged in the discharge port and is coaxial with the rotation axis of the rotary frame.

[0018] Furthermore, the rotary frame comprises:

[0019] a rotating shaft, the rotating shaft being rotatably connected in the housing;

[0020] A rotating disk, wherein a plurality of rotating disks are provided and arranged on the rotating shaft at intervals along the axial direction of the rotating shaft;

[0021] A mounting rod, the mounting rod penetrates and connects each of the rotating disks, and the crushing hammer is rotatably connected to the mounting rod;

[0022] A spacer sleeve, which is sleeved on the mounting rod and separates adjacent crushing hammers on the same mounting rod;

[0023] The crushing hammers on different mounting rods are arranged in a staggered manner.

[0024] Furthermore, three to eight mounting rods are provided along the circumference of the turntable.

[0025] Furthermore, the mesh of the screen is circular or convex polygonal.

[0026] Furthermore, the screen comprises:

[0027] A first rod body, wherein a plurality of the first rod bodies are provided in the discharge port along the circumferential direction of the central axis of the rotary frame;

[0028] a second rod body, the second rod body being bent and fixedly connected to all the first rod bodies;

[0029] The second rod body is provided with a plurality of rods, which are interwoven with the first rod body to form a mesh.

[0030] Furthermore, the crushing hammer is provided with a protrusion made of wear-resistant alloy.

[0031] Furthermore, the material of the material guide wall is any one of rubber, nylon, polyester or polyurethane.

[0032] Furthermore, a collecting bin is provided at the bottom end of the secondary separation chamber, and a closed-air unloading device is provided at the bottom end of the collecting bin.

[0033] Compared with the prior art, the utility model has the following advantages:

[0034] The crusher and separation bin described in the utility model are combined, and the straw with agricultural film first enters the crusher for crushing, and the crushed straw and agricultural film enter the separation bin. Since the agricultural film has a small specific gravity and a large area, it can be easily sent out of the air outlet through the air selection channel by the airflow of the separation bin. Since the small pieces of straw have a large specific gravity and a small volume, they are less affected by the airflow and are discharged from the separation bin through the separation bin outlet under the action of gravity, thereby realizing the simultaneous crushing of straw and separation of agricultural film. The overall structure is simple, the space occupied is small, and the manufacturing cost is low.

[0035] In addition, due to the cylindrical shape of the pulverizer, the air selection channel in the separation bin will be wide at the rear end or wide at both ends and narrow in the middle. At the same time, a wind blocking part is provided on the pulverizer to enhance the Venturi effect. The airflow enters the secondary separation chamber at the rear end of the air selection channel and decelerates. Some straw fragments mixed in the airflow are heavier and will fall on the guide wall, slide downward along the guide wall, and finally be discharged from the outlet; the agricultural film in the airflow is lighter and will float in the secondary separation chamber and finally be sent out of the outlet, achieving the effect of air selection and separation on both sides.

[0036] Secondly, the agricultural film discharged from the air outlet is relatively clean and meets the standards for agricultural film recycling. The agricultural film can be recycled and reused, turning waste agricultural film into treasure, killing two birds with one stone.

[0037] In addition, the material guide wall is made of flexible material, which will buffer and unload the material when it hits the material guide wall. Compared with the rigid material guide wall, it is less likely to be deformed and damaged after long-term use. At the same time, the sound generated when the material hits the flexible material is also smaller, and it has certain sound insulation performance, which reduces the noise generated in the production process, reduces noise pollution, and is beneficial to the physical and mental health of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0039] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0040] Figure 2 This is a schematic diagram of the overall structure of the second embodiment of the present utility model;

[0041] Figure 3 This is a schematic diagram of the internal structure of the separation bin and the crusher in the second embodiment of the utility model;

[0042] Figure 4 This is a schematic diagram of the structure of the screen in two other possible implementation modes of Example 2 of the utility model;

[0043] Figure 5 This is a schematic diagram of the structure of a crushing hammer according to the second embodiment of the utility model.

[0044] Description of reference numerals:

[0045] 1. Separation bin; 11. Air outlet; 12. Material outlet; 13. Material guide wall; 14. Secondary separation chamber; 15. Material collection bin;

[0046] 2. pulverizer; 21. air blocking part; 22. housing; 221. feeding port; 222. discharging port; 23. rotating frame; 231. rotating shaft; 232. rotating disk; 233. mounting rod; 234. spacer sleeve; 24. pulverizing hammer; 241. protrusion; 25. screen; 251. first rod body; 252. second rod body;

[0047] 3. Negative pressure fan;

[0048] 4. Air-locked unloading device. DETAILED DESCRIPTION

[0049] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0050] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0052] The following will refer to the attached Figure 1-5 The utility model is described in detail in conjunction with the embodiments.

[0053] Embodiment 1

[0054] This embodiment relates to a complete system for separating straw and agricultural film. The overall structure is as follows: Figure 1 As shown, it comprises a separation bin 1, a pulverizer 2 and a negative pressure fan 3. The pulverizer 2 is arranged on the separation bin 1, and the negative pressure fan 3 is connected to the separation bin 1 and creates negative pressure in the separation bin 1.

[0055] The separation bin 1 is provided with a feed inlet and an air outlet 11 at the top, and a discharge port 12 at the bottom, which also serves as an air inlet. The side wall of the separation bin 1 between the discharge port 12 and the air outlet 11 is a guide wall 13, and the height of the guide wall 13 gradually increases in the direction toward the air outlet 11, forming an inclined inner wall, so that the bottom end of the separation bin 1 is closed. The pulverizer 2 is arranged at the feed inlet of the separation bin 1 and is sealed with the separation bin 1. The pulverizer 2 is provided with a feed inlet 221 at the top and a discharge port 222 at the bottom. The feed inlet 221 is located outside the separation bin 1, and the discharge port 222 is located inside the separation bin 1. The raw materials are fed into the pulverizer 2 from the feed inlet 221, and are discharged into the separation bin 1 from the discharge port 222 after being pulverized. The negative pressure fan 3 is connected to the air outlet 11 to suck the air mixed with the agricultural film out of the separation bin 1.

[0056] An air selection channel is formed between the material guide wall 13 and the pulverizer 2. The pulverizer 2 includes an air blocking portion 21 that partially blocks the air selection channel. The cross-section of the air selection channel is narrowed between the air blocking portion 21 and the material guide wall 13, so that the air selection channel between the air blocking portion 21 and the air outlet 11 forms a secondary separation chamber 14. The secondary separation chamber 14 can perform secondary separation on air mixed with a small amount of lighter materials.

[0057] Due to the action of the negative pressure fan 3, air enters the separation bin 1 from the discharge port 12, and flows upward and out of the separation bin 1 from the air outlet 11. The straw with the agricultural film first enters the crusher 2 for crushing, and the crushed straw pieces and agricultural film enter the separation bin 1. Since the agricultural film has a small specific gravity and a large area, it will be easily sent out of the air outlet 11 through the air selection channel by the airflow of the separation bin 1; while the straw pieces have a large specific gravity and a small volume, and are less affected by the airflow, and will fall on the guide wall 13 under the action of gravity, and be discharged from the separation bin 1 from the discharge port 12 through the guide wall 13, so as to achieve the separation of the straw and the agricultural film. The two processes of straw crushing and agricultural film separation are carried out simultaneously, which greatly improves the production efficiency.

[0058] In addition, the air selection channel in the separation bin 1 will become wider at its rear end, and the wind blocking part 21 on the pulverizer 2 can enhance the Venturi effect of the air selection channel. The airflow will slow down when entering the secondary separation chamber 14 at the rear end of the air selection channel. The straw fragments mixed in the airflow are heavier and will fall on the guide wall 13, slide downward along the guide wall 13 and finally merge into the discharge port 12; the agricultural film in the airflow is lighter and will float in the secondary separation chamber 14, and finally be sent out of the air outlet 11, thereby realizing the function of further secondary air selection and separation of light straw pieces and agricultural film in the secondary separation chamber 14.

[0059] In this embodiment, the air blocking part 21 is connected to the housing 22 of the pulverizer 2. The air blocking part 21 can be an arc-shaped plate or an L-shaped plate bent in the middle, as long as the secondary separation chamber 14 can be formed at the rear end of the air selection channel.

[0060] The combination of the air outlet 11, the material guide wall 13, the air blocking part 21 and the negative pressure fan 3 can be set in one group on the horizontal side of the separation bin 1, or in one group on each of the horizontal sides of the separation bin 1. Setting one group is more energy-saving, the structure is simpler, and the manufacturing cost is relatively low; setting two groups has a better separation effect, which can be selected according to actual needs. This embodiment has two groups. The two air blocking parts 21 are of different lengths. The air blocking part 21 facing the material is longer, in order to prevent the material from being thrown directly into the air selection channel by the crusher 2. Figure 1 For example, if the material in the pulverizer 2 rotates clockwise, the left wind blocking portion 21 is longer.

[0061] Embodiment 2

[0062] This embodiment relates to a complete system for separating straw and agricultural film. Figures 2 to 5As shown, the difference from the first embodiment is that a collecting bin 15 is provided at the bottom of the secondary separation chamber 14, and a closed-air unloading device 4 is provided at the bottom of the collecting bin 15. The collecting bin 15 is arranged vertically or inclined, the top end is connected to the secondary separation chamber 14, and the bottom opening is connected to the closed-air unloading device 4. After the straw pieces and the agricultural film in the secondary separation chamber 14 are separated, most of the straw pieces will fall into the collecting bin 15 under the action of gravity. When the straw pieces accumulate to a certain extent, the closed-air unloading device 4 will send the straw pieces out of the collecting bin 15, so that these straw pieces can be separated and recovered separately or merged into the main material discharged from the discharge port 12, so that the separation of straw and agricultural film is more thorough.

[0063] In one feasible manner, the air-locking unloading device 4 is an air-locking unloader, which can keep the bottom end of the collecting bin 15 in a windproof state, and it is not easy for gas to enter the separation bin 1 from the collecting bin 15, thereby ensuring the normal flow of the air separation airflow in the secondary separation chamber 14 and making the overall air tightness of the separation bin 1 better.

[0064] In another practicable manner, the air-tight unloading device 4 includes a unloading plate and a counterweight. The bottom end of the aggregate bin 15 is an inclined opening, and the unloading plate is rotatably connected to the highest end of the bottom opening of the aggregate bin 15. The unloading plate is used to block the bottom opening of the aggregate bin 15 on one side of its rotating shaft, and the other side acts as a counterweight or is used to connect the counterweight. When there is no material on the unloading plate in the aggregate bin, the unloading plate will be affected by the gravity of the counterweight and cover the opening of the aggregate bin 15; when the material in the aggregate bin 15 reaches a certain weight, the unloading plate is overturned by the pressure of the material, and the material is discharged from the bottom of the aggregate bin 15, and then the unloading plate is reset to complete the unloading action.

[0065] In this embodiment, the combination of two groups of air outlets 11, material guide walls 13, wind blocking parts 21 and negative pressure fans 3 respectively corresponds to the combination of collecting bins 15 and air-blocking unloading devices 4. The two air-blocking unloading devices 4 respectively adopt the above two different structures which can replace each other.

[0066] The agricultural film separation system of this embodiment has a simple overall structure, small space occupation, low manufacturing cost and good separation effect. Compared with the air selection method of transmission blowing, the suction method of the negative pressure fan 3 can make the dust generated in the crushing process less likely to spread, which is more environmentally friendly and improves the working environment. The agricultural film discharged from the air outlet 11 is relatively clean and meets the standards for agricultural film recycling. The agricultural film can be recycled and reused, realizing the transformation of waste agricultural film into treasure, killing two birds with one stone.

[0067] Optionally, the material guide wall 13 can be made of any material selected from rubber, nylon, polyester or polyurethane in addition to being made of metal plates. The material guide wall 13 is made of a flexible material, and when the material hits the material guide wall 13, there will be a buffering and unloading effect. Compared with the rigid material guide wall 13, it is less likely to be deformed and damaged after long-term use. The sound generated when the material hits the flexible material is also smaller. At the same time, the flexible material has a certain sound insulation performance, so that the noise generated during the production process is less, reducing noise pollution, which is beneficial to the physical and mental health of the staff. In this embodiment, the material guide wall 13 is made of rubber, and a metal frame is set around or attached to the outside to ensure strength and durability.

[0068] Specifically, the pulverizer 2 includes a casing 22, a rotating frame 23, a crushing hammer 24, a screen 25, a choke 21 and a driving device. The casing 22 is in the shape of a volute as a whole, and is provided with a feeding port 221 and a discharge port 222, and the discharge port 222 is connected to the feed port of the separation bin 1. The rotating frame 23 is rotatably connected in the casing 22. The crushing hammer 24 is rotatably connected to the rotating frame 23, and a plurality of crushing hammers 24 are evenly distributed along the circumference of the rotating frame 23, and the crushing hammers 24 are eccentrically connected. The screen 25 is arranged in the discharge port 222, and is shaped like an arc plate coaxial with the rotation axis of the rotating frame 23. The driving device is arranged outside the casing 22, and is used to drive the rotating frame 23 to rotate, and can be a combination of a motor, a motor speed regulator, or a power device such as an internal combustion engine. In this embodiment, the choke 21 is a part of the outer shell of the pulverizer 2, and the bottom end is the discharge port 222 of the pulverizer 2.

[0069] When the rotary frame 23 rotates to a certain speed, the crushing hammer 24 will be extended in the direction away from the rotation axis of the rotary frame 23 by the centrifugal force, and the end face of the crushing hammer will approach the screen 25 and keep a certain distance from the screen 25, so that the crushing hammer can not only clamp the material (straw, agricultural film and debris) with the screen to crush it, but also ensure that the small pieces of straw and agricultural film can pass through the screen 25 smoothly. During the rotation of the rotary frame 23, the crushing hammer 24 will hit the raw material and crush it into small pieces. The crushed small pieces of straw and agricultural film will pass through the screen 25 and then enter the separation bin 1 from the discharge port 222.

[0070] Specifically, the rotating frame 23 includes a rotating shaft 231, a rotating disk 232, a mounting rod 233 and a spacer sleeve 234. The rotating shaft 231 is rotatably connected in the housing 22, and one end or both ends of the rotating shaft 231 pass through the housing 22 to connect to the driving device, which is the power input end of the entire rotating frame 23. There are multiple rotating disks 232, which are fixedly connected to the rotating shaft 231 at intervals along the axial direction of the rotating shaft 231. In this embodiment, there are five rotating disks 232. The rotating disk 232 is circular in shape, which is relatively stable when rotating and easy to process.

[0071] The mounting rod 233 passes through and connects the turntables 232 , and its central axis is parallel to the central axis of the rotating shaft 231 . The crushing hammers 24 are rotatably connected to the mounting rod 233 . The crushing hammers 24 on the same mounting rod 233 are evenly spaced, and the crushing hammers 24 on different mounting rods 233 are staggered.

[0072] The spacer sleeve 234 is sleeved on the mounting rod 233 to separate adjacent pulverizing hammers 24 on the same mounting rod 233 and to limit the distance between the pulverizing hammers 24 .

[0073] Specifically, three to eight mounting rods 233 are provided along the circumference of the turntable 232 . The more mounting rods 233 are provided, the higher the crushing frequency is. In this embodiment, four mounting rods 233 are provided, which are evenly spaced along the circumference of the rotating shaft 231 .

[0074] In an operative manner, the screen 25 includes a first rod 251 and a second rod 252. A plurality of first rods 251 are provided in the discharge port 222 along the circumferential direction of the central axis of the rotary frame 23. The second rod 252 is bent into a semicircular ring shape, fixedly connecting all the first rods 251. The second rod 252 is also provided with a plurality of rods, interwoven with the first rod 251 to form a plurality of quadrilateral meshes. The screen 25 of this structure has a high structural strength and is more wear-resistant and durable. The material and processing methods are also simpler. It can be made by cutting and bending commercial steel bars and then welding them.

[0075] Reference Figure 4 In other practicable embodiments, the meshes of the screen 25 may also be circular or convex polygonal. The meshes of different rows are arranged in a staggered manner to reduce the ineffective screening area of ​​the screen 25.

[0076] Reference Figure 5 Specifically, the crushing hammer 24 is provided with a lug 241 made of a wear-resistant alloy. In this embodiment, the lug 241 made of a wear-resistant alloy is connected to the crushing hammer 24 by welding, and is in the shape of a cone, and is arranged on the side wall of the crushing hammer 24 that hits the material. The lug 241 can improve the overall wear resistance and impact resistance of the crushing hammer 24, reduce the wear of the crushing hammer 24, thereby reducing the maintenance cost, and also improve the crushing efficiency. The wear-resistant alloy can be made of nickel-chromium alloy, carbide alloy or rare earth wear-resistant alloy.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A complete system for separating straw and agricultural film, characterized in that: include: A separation bin (1), wherein the top of the separation bin (1) is provided with a material inlet and an air outlet (11), and the bottom is provided with a material outlet (12), and the material outlet (12) also serves as an air inlet; A pulverizer (2), the pulverizer (2) being arranged at the feed inlet; The side wall of the separation bin (1) between the material outlet (12) and the air outlet (11) is a material guide wall (13), and the material guide wall (13) gradually increases in height in a direction toward the air outlet (11); An air selection channel is formed between the material guide wall (13) and the pulverizer (2), the pulverizer (2) comprising an air blocking portion (21) that partially blocks the air selection channel, the air selection channel having a narrowed cross section between the air blocking portion (21) and the material guide wall (13), so that the air selection channel between the air blocking portion (21) and the air outlet (11) forms a secondary separation chamber (14).

2. The complete system for separating straw and agricultural film according to claim 1 is characterized in that: An air outlet (11) is respectively provided at the top of the separation bin (1) and on both sides of the pulverizer (2), and each of the air outlets (11) is correspondingly provided with a material guide wall (13) and an air blocking portion (21).

3. The complete system for separating straw and agricultural film according to claim 1, characterized in that: The pulverizer (2) further comprises: A casing (22), wherein the casing (22) is provided with a feeding port (221) and a discharging port (222), and the discharging port (222) is connected to the feeding port; A rotating frame (23), the rotating frame (23) is rotatably connected in the housing (22); A crushing hammer (24), wherein the crushing hammer (24) is rotatably connected to the rotating frame (23), and a plurality of crushing hammers (24) are evenly distributed along the circumference of the rotating frame (23); A screen (25), wherein the screen (25) is arranged in the discharge port (222) and is coaxial with the rotation axis of the rotary frame (23).

4. The complete system for separating straw and agricultural film according to claim 3, characterized in that: The rotary frame (23) comprises: A rotating shaft (231), the rotating shaft (231) being rotatably connected in the housing (22); A rotating disk (232), wherein a plurality of rotating disks (232) are provided and are arranged on the rotating shaft (231) at intervals along the axial direction of the rotating shaft (231); A mounting rod (233), the mounting rod (233) penetrates and connects each of the rotating disks (232), and the crushing hammer (24) is rotatably connected to the mounting rod (233); A spacer sleeve (234), wherein the spacer sleeve (234) is sleeved on the mounting rod (233) and separates adjacent crushing hammers (24) on the same mounting rod (233); The crushing hammers (24) on different mounting rods (233) are arranged in a staggered manner.

5. The complete system for separating straw and agricultural film according to claim 4 is characterized in that: Three to eight mounting rods (233) are provided along the circumference of the rotating disk (232).

6. The complete system for separating straw and agricultural film according to claim 3, characterized in that: The mesh openings of the screen (25) are circular or convex polygonal.

7. The complete system for separating straw and agricultural film according to claim 3, characterized in that: The screen (25) comprises: A first rod body (251), wherein a plurality of the first rod bodies (251) are provided in the discharge port (222) along the circumferential direction of the central axis of the rotary frame (23); A second rod (252), the second rod (252) being bent and fixedly connected to all the first rods (251); The second rod bodies (252) are provided in plurality and are interwoven with the first rod bodies (251) to form a mesh.

8. The complete system for separating straw and agricultural film according to claim 3, characterized in that: The crushing hammer (24) is provided with a protrusion (241) made of a wear-resistant alloy material.

9. The complete system for separating straw and agricultural film according to claim 1, characterized in that: The material of the material guide wall (13) is any one of rubber, nylon, polyester or polyurethane.

10. The complete system for separating straw and agricultural film according to claim 1, characterized in that: A material collecting bin (15) is provided at the bottom end of the secondary separation chamber (14), and a closed-air unloading device (4) is provided at the bottom end of the material collecting bin (15).

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