A harmless recycling and high-value utilization method of agricultural mulching film

Abstract

The application discloses a harmless recycling and high-value utilization method of agricultural mulching film, and relates to the technical field of recycling, which comprises a winnowing chamber, a solid recycling mechanism, a dust suppression recycling mechanism, a spraying mechanism and a wind guide mechanism. Dust is suppressed and recycled through the spraying chamber and the spraying mechanism, and a degradation reagent is sprayed on the mulching film fragments. Meanwhile, the recycling transmission belt guides the airflow and recycles the mulching film fragments entrained by the airflow. The mulching film fragments are attached to the surface of the recycling transmission belt, are transferred into the drying chamber, and are recycled and dried by cooperating with the air heater. In the transferring process, the degradation reagent sprayed on the surface of the mulching film fragments degrades the pesticide. The airflow is guided by the wind guide mechanism, and is branched and discharged by cooperating with the flat air jet head and the inclined air jet plate. Then, the airflow is used to reduce the silt blockage of the discharge port at the bottom of the discharge chute and to maintain the temperature at the bottom of the opening and closing screen, so that the mulching film fragments accumulated on the top of the opening and closing screen are prevented from melting and adhering due to the excessively high temperature.

Description

Technical Field

[0001] This invention relates to the field of recycling technology, specifically a method for the harmless recycling and high-value utilization of agricultural mulch film. Background Technology

[0002] Agricultural mulch film is a type of plastic film widely used in agriculture. It is mainly used to cover farmland to increase soil temperature, maintain soil moisture, promote seed germination and rapid seedling growth, and suppress weed growth. As an important material for achieving "reduction, reuse, and resource recovery" in modern economic development, its production and processing are pollution-free, low-consumption, and highly efficient processes. Most agricultural mulch film mixed with impurities such as mud, sand, and straw can be reused after being shredded, sorted, and recycled. It is a typical resource-saving material. Therefore, the shredding, sorting, recycling, and reuse of agricultural mulch film is of great practical significance.

[0003] The main drawbacks of existing technologies are as follows: Existing sorting equipment for the recycling and regeneration of waste plastic film generally uses air classification, in which dust and plastic film fragments are concentrated together in the filtration and screening equipment. Although it can effectively intercept and recycle plastic film fragments, due to factors such as wind force or the indentation of the surface of the plastic film fragments, a large amount of dust is easily mixed in during the recycling process. In addition, the surface of existing plastic film usually has pesticide residues, and the dust accumulated on its surface will affect the efficiency of subsequent spraying of degradation reagents. Furthermore, during the subsequent drying process, the surface temperature of the filter ventilation screen at the bottom of the drying chamber is usually high due to continuous hot air heating, which can easily melt the plastic film fragments and affect subsequent recycling. Summary of the Invention

[0004] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a method for the harmless recycling and high-value utilization of agricultural mulch film.

[0005] This invention is achieved by constructing a method for the harmless recycling and high-value utilization of agricultural mulch film, with the following steps: Step 1: Separate soil clods and debris mixed with plastic film fragments using an air separation device; Step 2: Use solid waste recycling equipment to recover most of the larger soil clods and debris; Step 3: A large airflow is generated by the air separation equipment to blow the dust and mulch film fragments separated during the crushing process into the dust suppression and recycling equipment; Step 4: The dust in the airflow is suppressed and recovered by the spraying part of the dust suppression and recovery equipment, and degradation reagents are sprayed on the mulch film fragments; Step 5: The dust suppression and recovery equipment guides the airflow and recovers the mulch film fragments in the airflow through the transmission section and the air guide section. Step Six: Dry the plastic film fragments using the drying section of the dust suppression and recycling equipment; Step 7: Reuse the airflow through the air guide section of the dust suppression and recovery equipment to reduce sludge blockage at the bottom of the spraying section; Step 8: The plastic film fragments are extruded, melted, shaped, and reused using an extrusion melting device; Step 9: The airflow is reused through the air guide section of the dust suppression and recovery equipment to maintain the temperature at the bottom of the drying section.

[0006] The device includes: the air separation equipment includes an air separation chamber; the solid recovery equipment includes a solid recovery mechanism; the dust suppression and recovery equipment includes a dust suppression and recovery mechanism, a spraying mechanism, and an air guiding mechanism; the extrusion melting equipment includes an extrusion melting device; the dust suppression and recovery mechanism further includes a spraying chamber and a drying chamber; the rear air outlet of the air separation chamber is fixedly connected to the spraying chamber; the rear end of the spraying chamber is fixedly connected to the drying chamber; a recovery conveyor belt is vertically arranged between the spraying chamber and the drying chamber; an air guiding mechanism is provided inside the recovery conveyor belt; a discharge chute is provided at the bottom of the spraying chamber; spraying mechanisms are provided on the left and right sides of the spraying chamber; a hot air blower is fixedly connected to the top surface of the drying chamber; three sets of inclined scrapers are fixedly connected at equal intervals to the front of the inner side of the drying chamber; the front end of the inclined scrapers is in contact with the back of the recovery conveyor belt; a second recovery funnel is fixedly connected to the bottom of the drying chamber; an opening and closing screen is provided on the top surface of the second recovery funnel; and an extrusion melting device is provided at the lower end of the second recovery funnel.

[0007] Preferably, a first motor is fixedly connected to the middle of the front side of the air classifier chamber. The output shaft of the first motor passes through and is rotatably connected to the front side of the air classifier chamber. The output shaft of the first motor is fixedly connected to the front end of a long transmission shaft. The long transmission shaft passes through and is rotatably connected to the central shaft inside the air classifier chamber. A fan is fixedly connected to the front end of the long transmission shaft. A crushing blade is fixedly connected to the rear end of the long transmission shaft. The front end of the long transmission shaft passes through and is rotatably connected to a through hole in the middle of the isolation net. The isolation net is fixedly connected to the front side of the air classifier chamber. A first scraper is fixedly connected to the front end of the crushing blade. The front end of the crushing blade is attached to the back of the isolation net. An arc-shaped plug is provided at the bottom of the air classifier chamber.

[0008] Preferably, the air guiding mechanism includes: a hollow air guiding plate, a hollow air guiding plate is provided on the inner side of the recycling conveyor belt, inclined air guiding cross plates are fixedly connected at equal intervals on the front side of the hollow air guiding plate, a fan is fixedly connected to the middle of the left and right sides of the hollow air guiding plate, a first air guiding pipe is fixedly connected to the fan side on the right side of the hollow air guiding plate, a flat jet head is fixedly connected to the lower end of the hollow air guiding plate, the front end of the flat jet head is fixedly connected to the side of the discharge port of the discharge trough, a second air guiding pipe is fixedly connected to the fan side on the left side of the hollow air guiding plate, an inclined jet plate is fixedly connected to the lower end of the second air guiding pipe, and the inclined jet plate is arranged on the inclined surfaces of the left and right sides inside the second recycling funnel.

[0009] Preferably, the solid recycling mechanism includes: a first recycling funnel, the bottom of the air separation chamber is fixedly connected to the first recycling funnel, the top surface of the first recycling funnel is slidably connected to an arc-shaped blade holder, the inner side of the arc-shaped blade holder is provided with multiple sets of arc-shaped scrapers at equal intervals, and the upper left and right sides of the arc-shaped blade holder are fixedly connected to a transmission rod, the middle groove of the transmission rod is connected to the short transmission shaft on the side of the transmission turntable, the center of the side of the transmission turntable is fixedly connected to the output shaft of a second motor, and the second motor is fixedly connected to the middle of the upper left and right sides of the first recycling funnel.

[0010] Preferably, the spraying mechanism includes: a first transmission belt, the rear end of the transmission shaft is fixedly connected to the center of the transmission wheel in the middle of the first transmission belt, the center of the front side of the transmission wheel on the left and right sides of the first transmission belt is connected to the second transmission belt via bevel gears, the center of the upper transmission wheel of the second transmission belt is fixedly connected to the spray head, and the spray head is rotatably connected to the left and right sides of the spray chamber.

[0011] Preferably, a second scraper is fixedly connected to the left and right sides of the spray chamber, the lower end of the second scraper is in contact with the spray surface of the spray head, the first transmission belt is installed on the front side of the mounting plate, and the center of the back of the transmission wheel on the left and right sides of the first transmission belt is fixedly connected to the connecting long shaft, the rear end of the connecting long shaft is fixedly connected to the lower transmission wheel of the third transmission belt, and the center of the upper transmission wheel of the third transmission belt is fixedly connected to the rear end of the reciprocating screw.

[0012] Preferably, the rear end of the reciprocating screw is threadedly connected to the left and right end through holes of the connecting crossbar, the left and right ends of the connecting crossbar are slidably connected to the left and right sides inside the discharge trough, the bottom of the connecting crossbar is equipped with a trapezoidal scraper, the bottom of the trapezoidal scraper is in contact with the bottom of the discharge trough, the lower part of the second transmission belt is rotatably connected to the short plates installed on the left and right sides of the spray chamber, the mounting crossbar is fixedly connected to the bottom of the spray chamber, and the upper transmission wheel of the third transmission belt is rotatably connected to the reciprocating screw inside the two side walls of the spray chamber.

[0013] Preferably, the inner side of the arc-shaped blade holder has multiple sets of arc-shaped scrapers that fit into the bottom of the arc-shaped mesh, the side of the recycling conveyor belt is triangular with its front side being an inclined surface, and the upper end of the recycling conveyor belt has a certain gap with the top surface of the spray chamber. The recycling conveyor belt is made of a waterproof and breathable membrane.

[0014] Preferably, the front side of the hollow air guide plate and the inclined air guide plate are left with a certain gap from the front side of the inner side of the recycling conveyor belt. The opening and closing screen is driven by a motor. The lower end collection trough of the second recycling funnel is rotatably connected to the auger of the extrusion melting device. The left and right sides of the back of the inclined scraper are provided with guide blocks, and the back guide surface is trapezoidal. The bottom of the discharge port of the discharge trough is provided with a rotary ash discharge valve.

[0015] This invention has the following advantages: This invention provides an improved method for the harmless recycling and high-value utilization of agricultural mulch film, which, compared with similar equipment, has the following improvements: This invention discloses a method for the harmless recycling and high-value utilization of agricultural mulch film. A spraying chamber and spraying mechanism suppress and collect dust, and spray degradation reagents onto mulch film fragments. Simultaneously, a recycling conveyor belt and a wind-guiding mechanism guide airflow and collect the mulch film fragments carried along with it. The fragments adhere to the surface of the recycling conveyor belt and are then transferred to a drying chamber where a hot air blower dries them. During this transfer, the sprayed degradation reagents degrade pesticides on the surface of the mulch film fragments. The wind-guiding mechanism, combined with flat jet nozzles and inclined jet plates, diverts and discharges the airflow, thereby reducing sludge blockage at the bottom of the discharge trough and maintaining the temperature at the bottom of the opening and closing screen. This prevents the mulch film fragments accumulated on the top surface from melting and adhering due to excessively high screen temperatures. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the method steps of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the air separator chamber of the present invention; Figure 4 This is a schematic diagram of the internal structure of the dust suppression and recycling mechanism of the present invention; Figure 5 This is a schematic diagram of the air guide mechanism of the present invention; Figure 6 This is a schematic diagram of the spraying mechanism of the present invention; Figure 7 This is a schematic diagram of the internal structure of the drying chamber and the second recovery funnel of the present invention; Figure 8 This is a schematic diagram of the solid waste recycling mechanism of the present invention.

[0017] The components include: air separation chamber-100, first motor-101, solid recovery mechanism-102, transmission shaft-103, fan-104, isolation net-105, crushing blade-106, first scraper-107, arc-shaped plug net-108, first recovery funnel-109, arc-shaped blade holder-110, transmission rod-111, transmission turntable-112, second motor-113, dust suppression and recovery mechanism-200, spraying chamber-201, drying chamber-202, recovery conveyor belt-203, discharge chute-204, second scraper-205, second recovery funnel-206, opening and closing screen-207, and extrusion. Melting device-208, inclined scraper-209, hot air blower-210, spraying mechanism-300, first transmission belt-301, mounting plate-302, bevel gear-303, second transmission belt-304, spray head-305, connecting long shaft-306, third transmission belt-307, reciprocating screw-308, connecting crossbar-309, trapezoidal scraper-310, air guiding mechanism-400, hollow air guiding plate-401, inclined air guiding plate-402, fan-403, first air guiding pipe-404, flat jet nozzle-405, second air guiding pipe-406, inclined jet plate-407. Detailed Implementation

[0018] The following is in conjunction with the appendix Figures 1-8 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 the invention 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The embodiments of this invention will now be described according to its overall structure.

[0021] Example 1:

[0022] Please see Figures 1-8 The present invention discloses a method for the harmless recycling and high-value utilization of agricultural mulch film, comprising the following steps: Step 1: The soil clods and debris mixed with plastic film fragments are crushed and separated by air separation equipment, and most of the larger soil clods and debris, dust and plastic film fragments are transported to the next process unit by airflow and gravity. Step 2: The solid waste recycling equipment recovers most of the larger soil clods and debris, and continuously scrapes the bottom screen of the air classifier to prevent soil clods and debris from clogging the screen as they fall. Step 3: A large airflow is generated by the air separation equipment to blow the dust and mulch film fragments separated during crushing into the dust suppression and recycling equipment, so as to avoid the separation of materials after crushing being mixed again, which is not conducive to subsequent recycling. Step 4: The dust in the airflow is suppressed and recovered by the spraying part of the dust suppression and recovery equipment, and degradation reagents are sprayed on the mulch film fragments to facilitate harmless treatment. Step 5: The airflow is guided by the transmission section and the air guide section of the dust suppression and recycling equipment, and the film fragments in the airflow are recovered and reused. At the same time, the stability of the airflow direction of the dust suppression and recycling equipment is maintained. Step Six: The film fragments are dried by the drying section of the dust suppression and recycling equipment to facilitate subsequent melting, shaping, and reuse. Step 7: By reusing the airflow through the air guide section of the dust suppression and recovery equipment, the silt blockage at the bottom of the spray section is reduced, and blockage caused by the slow natural flow of silt is avoided. Step 8: The plastic film fragments are extruded, melted, shaped, and reused using extrusion melting equipment to improve their reuse value. Step 9: The airflow is reused through the air guide section of the dust suppression and recovery equipment to maintain the temperature at the bottom of the drying section, preventing the film fragments from melting and adhering to the drying section during the drying process.

[0023] Example 2:

[0024] Please see Figures 1-8 The present invention discloses a method for the harmless recycling and high-value utilization of agricultural mulch film, comprising: an air separation device including an air separation chamber 100; a solid recycling device including a solid recycling mechanism 102; a dust suppression and recycling device including a dust suppression and recycling mechanism 200, a spraying mechanism 300, and an air guiding mechanism 400; an extrusion melting device including an extrusion melting device 208; the dust suppression and recycling mechanism 200 further including a spraying chamber 201 and a drying chamber 202; a first motor 101 is fixedly connected to the middle of the front side of the air separation chamber 100; and the output shaft of the first motor 101... A drive shaft 103 is rotatably connected to the front side of the air classifier chamber 100. The output shaft of the first motor 101 is fixedly connected to the front end of the drive shaft 103, which is rotatably connected to the central shaft inside the air classifier chamber 100. A fan 104 is fixedly connected to the front end of the drive shaft 103, and a crusher 106 is fixedly connected to the rear end of the drive shaft 103 for easy material separation. The front end of the drive shaft 103 is rotatably connected to a through hole in the middle of an isolation net 105, which is fixedly connected to the front side of the air classifier chamber 100 to prevent material separation. The product adheres to the fan 104. A first scraper 107 is fixedly connected to the front end of the crushing blade 106 to facilitate continuous scraping away blockages. The front end of the crushing blade 106 is attached to the back of the isolation net 105 to facilitate continuous scraping away the separated material blocking the isolation net 105. An arc-shaped plug net 108 is provided at the bottom of the air separation chamber 100. The solid recovery mechanism 102 includes: a first recovery funnel 109, which is fixedly connected to the bottom of the air separation chamber 109. An arc-shaped blade holder 110 is slidably connected to the top surface of the first recovery funnel 109. Inside the arc-shaped blade holder 110... Multiple sets of arc-shaped scrapers are equidistantly arranged on the sides, and transmission rods 111 are fixedly connected to the left and right sides of the upper end of the arc-shaped scraper holder 110. The middle groove of the transmission rod 111 is connected to the short transmission shaft on the side of the transmission turntable 112. The center of the side of the transmission turntable 112 is fixedly connected to the output shaft of the second motor 113. The second motor 113 is fixedly connected to the middle of the left and right sides of the upper end of the first recycling funnel 109. Multiple sets of arc-shaped scrapers on the inner side of the arc-shaped scraper holder 110 are in contact with the bottom of the arc-shaped plug 108, which facilitates scraping the arc-shaped plug 108 and prevents the arc-shaped plug 108 from becoming blocked.

[0025] The working principle of the agricultural mulch film harmless recycling and treatment equipment based on Embodiment 2 is as follows: First, the material is poured into the air separation chamber 100. Then, the first motor 101 drives the transmission shaft 103, which in turn drives the fan 104 and the crushing blade 106 to rotate, thereby generating airflow and separating large particles such as soil clods, dust and mulch film fragments. The airflow carries the dust and mulch film fragments into the spray chamber 201 of the dust suppression and recovery mechanism 200, while large particles such as soil clods fall into the solid recovery mechanism 102 through the arc-shaped plug net 108. The output shaft of the second motor 113 of the solid recycling mechanism 102 drives the transmission turntable 112 to rotate, which in turn drives the arc-shaped blade holder 110 to move back and forth on the top surface of the first recycling funnel 109 in conjunction with the transmission rod 111. This causes multiple sets of arc-shaped scrapers on the inner side of the arc-shaped blade holder 110 to scrape the bottom of the arc-shaped mesh 108, preventing large particles of debris from clogging the arc-shaped mesh 108 and accelerating the falling of large particles of debris into the first recycling funnel 109 for recycling.

[0026] Example 3:

[0027] Please see Figures 1-8This invention provides a harmless recycling and treatment device for agricultural mulch film. Compared to Embodiment 2, this embodiment further includes: a rear air outlet of the air separation chamber 100 fixedly connected to the spraying chamber 201; a rear end of the spraying chamber 201 fixedly connected to the drying chamber 202; a recycling conveyor belt 203 vertically arranged between the spraying chamber 201 and the drying chamber 202; an air guide mechanism 400 provided inside the recycling conveyor belt 203; a discharge trough 204 at the bottom of the spraying chamber 201 for easy accumulation of recycled sludge; spraying mechanisms 300 on the left and right sides of the spraying chamber 201; a hot air blower 210 fixedly connected to the top surface of the drying chamber 202 for easy drying of mulch film fragments; and three sets of inclined scrapers 209 fixedly connected at equal intervals to the front of the inner side of the drying chamber 202, with the front ends of the inclined scrapers 209 connected to the recycling conveyor belt 202. The conveyor belt 203 is fitted to the back for easy scraping off damp plastic film fragments. A second recycling funnel 206 is fixedly connected to the bottom of the drying chamber 202. The top surface of the second recycling funnel 206 is equipped with an opening and closing screen 207. The lower end of the second recycling funnel 206 is equipped with an extrusion melting device 208 to facilitate the extrusion melting and shaping of the dried plastic film fragments for reuse. The air guiding mechanism 400 includes: a hollow air guiding plate 401. A hollow air guiding plate 401 is provided inside the recycling conveyor belt 203. Inclined air guiding cross plates 402 are fixedly connected at equal intervals on the front side of the hollow air guiding plate 401 to facilitate airflow guidance. Fans 403 are fixedly connected to the middle of the left and right sides of the hollow air guiding plate 401 to facilitate the introduction and discharge of airflow. The fan 403 is fixedly connected to the right side of the hollow air guiding plate 401. A first air duct 404 is connected to the hollow air guide plate 401. A flat jet nozzle 405 is fixedly connected to the lower end of the hollow air guide plate 401. The front side of the flat jet nozzle 405 has obliquely cut jet holes to facilitate the oblique discharge of airflow, so as to continuously blow away the sludge and reduce the blockage of the discharge chute 204. The front end of the flat jet nozzle 405 is fixedly connected to the side of the discharge port of the discharge chute 204 to facilitate the maintenance of the bottom temperature of the opening and closing screen 207 by the airflow discharged through it. A second air duct 406 is fixedly connected to the side of the blower 403 on the left side of the hollow air guide plate 401. An inclined jet plate 407 is fixedly connected to the lower end of the second air guide plate 406. The inclined jet plate 407 is set on the inclined surface on the left and right sides inside the second recovery funnel 206. The side of the recovery conveyor belt 203 is triangular and its front side is an inclined surface. The system facilitates airflow guidance, and a certain gap is left between the upper end of the recycling conveyor belt 203 and the top surface of the spray chamber 201 to facilitate the transfer of plastic film fragments into the drying chamber 202. The recycling conveyor belt 203 is made of a waterproof and breathable membrane, which facilitates airflow passage and reduces moisture entering the drying chamber 202. A certain gap is left between the front side of the hollow air guide plate 401 and the inclined air guide plate 402 and the inner front side of the recycling conveyor belt 203. The opening and closing screen 207 is driven by a motor. The lower end of the second recycling funnel 206 is connected to the auger of the extrusion and melting device 208, which facilitates the entry of dried plastic film fragments into the extrusion and melting device 208. The inclined scraper 209 has guide blocks on the left and right sides of its back, and its back guide surface is trapezoidal, which facilitates the collection and scraping of wet plastic film fragments onto the opening and closing screen 207.The discharge chute 204 has a rotary ash discharge valve at the bottom of its discharge port, which facilitates the discharge of sludge without affecting the sealing of the spray chamber 201 and preventing airflow deviation.

[0028] In this embodiment: When the airflow generated by the fan 104 sends dust and plastic film fragments into the spraying chamber 201, the spray head 305 of the spraying mechanism 300 continuously sprays water containing degradation reagent into the spraying chamber 201, keeping the inside of the spraying chamber 201 moist. This suppresses and condenses the dust in the airflow, which falls into the discharge trough 204 to form sludge, causing the residual pesticides on the surface of the plastic film fragments to mix with the degradation reagent and degrade. The airflow is guided by the fan 403 of the air guide mechanism 400 through the waterproof and breathable membrane of the recycling conveyor belt 203 and into the hollow air guide plate 401. As a result, the mulch film fragments in the airflow adhere to the front side of the recycling conveyor belt 203 due to the influence of the airflow and the moisture. The mulch film fragments are then transferred into the drying chamber 202 by the recycling conveyor belt 203. The damp plastic film fragments are scraped off the top surface of the opening and closing screen 207 by the inclined scraper 209, and then dried by the hot air blower 210. After the batch of materials has been processed, the opening and closing screen 207 is opened so that the accumulated plastic film fragments fall into the second recycling funnel 206, and then the plastic film fragments are squeezed, melted and shaped by the extrusion melting device 208 for reuse. The airflow is divided by the blower 403 in conjunction with the first air duct 404 and the second air duct 406, and discharged through the flat jet nozzle 405 and the inclined jet plate 407. When the airflow is discharged through the flat jet nozzle 405, the airflow continuously blows the sludge at the bottom discharge port of the discharge trough 204, reducing the risk of blockage. When the airflow is discharged through the inclined jet plate 407, the airflow maintains the temperature at the bottom of the opening and closing screen 207, preventing the opening and closing screen 207 from overheating due to prolonged baking, which would cause the plastic film fragments to melt and adhere to the top surface of the opening and closing screen 207, affecting subsequent discharge and recycling. After the opening and closing screen 207 is opened, its two screens are aligned horizontally with the inclined jet plate 407. The airflow continuously discharged by the inclined jet plate 407 blows the plastic film fragments down to the bottom of the second recycling funnel 206, preventing the plastic film fragments from being stuck and fixed on the screen surface due to their irregular shape.

[0029] Example 4:

[0030] Please see Figures 1-8The present invention provides a harmless recycling and treatment device for agricultural mulch film. Compared with Embodiment 3, this embodiment further includes: a spraying mechanism 300 comprising: a first transmission belt 301, the rear end of a transmission shaft 103 being fixedly connected to the center of the transmission wheel in the middle of the first transmission belt 301; the center of the front side of the transmission wheel on the left and right sides of the first transmission belt 301 being connected to a second transmission belt 304 via a bevel gear 303; the center of the upper transmission wheel of the second transmission belt 304 being fixedly connected to a spray head 305; the spray head 305 being rotatably connected to the left and right sides inside the spray chamber 201; a second scraper 205 being fixedly connected to the left and right sides inside the spray chamber 201; the lower end of the second scraper 205 being in contact with the spraying surface of the spray head 305 for easy scraping of the spraying surface of the rotating spray head 305; the first transmission belt 301 being installed on the front side of the mounting plate 302, and the center of the back of the transmission wheel on the left and right sides of the first transmission belt 301 being connected to the connecting shaft 303. 06 Fixed connection: The rear end of the connecting long shaft 306 is fixedly connected to the lower transmission wheel of the third transmission belt 307. The center of the upper transmission wheel of the third transmission belt 307 is fixedly connected to the rear end of the reciprocating screw 308. The rear end of the reciprocating screw 308 is threadedly connected to the left and right end through holes of the connecting crossbar 309, which facilitates the reciprocating motion of the connecting crossbar 309. The left and right ends of the connecting crossbar 309 are slidably connected to the left and right sides inside the discharge trough 204. A trapezoidal scraper 310 is installed at the bottom of the connecting crossbar 309, which facilitates the scraping of sludge during reciprocating motion. The bottom of the trapezoidal scraper 310 fits against the bottom of the discharge trough 204. The lower part of the second transmission belt 304 is rotatably connected to the left and right sides of the spray chamber 201 to install short plates for installation and fixation. The mounting plate 302 is fixedly connected to the bottom of the spray chamber 201. The upper transmission wheel of the third transmission belt 307 is rotatably connected to the reciprocating screw 308 inside the two side walls of the spray chamber 201.

[0031] In this embodiment: The transmission shaft 103, in conjunction with the first transmission belt 301 and the bevel gear 303, synchronously drives two sets of second transmission belts 304, which in turn synchronously drives the spray head 305 to rotate. While expanding the spraying area and effect, the fixed second scraper 205 continuously scrapes the spraying surface of the spray head 305 to prevent dust from condensing and adhering to its spray holes, thus affecting the spraying efficiency. The first transmission belt 301 drives the third transmission belt 307 to rotate synchronously through the connecting long shaft 306, thereby driving the reciprocating screw 308 to rotate, which in turn drives the connecting crossbar 309 and the trapezoidal scraper 310 to reciprocate inside the discharge trough 204. The trapezoidal scraper 310 reciprocates to scrape the silt accumulated inside the discharge trough 204 into the discharge port at its bottom, and then continuously discharges it through the rotary ash discharge valve at the bottom of the discharge port.

[0032] This invention provides an improved agricultural mulch film harmless recycling and treatment device. A spraying chamber 201, in conjunction with a spraying mechanism 300, suppresses and recovers dust, and sprays degradation agents onto mulch film fragments. Simultaneously, a recycling conveyor belt 203, in conjunction with a wind guide mechanism 400, guides airflow and recovers the mulch film fragments carried within it. The mulch film fragments adhere to the surface of the recycling conveyor belt 203 and are transferred to a drying chamber 202 where they are dried using a hot air blower 210. During this transfer, the degradation agents sprayed degrade pesticides on the surface of the mulch film fragments. The wind guide mechanism 400 guides the airflow while a flat jet nozzle 405 and an inclined jet plate 407 divert and discharge the airflow. This airflow reduces sludge blockage at the bottom discharge port of the discharge trough 204 and maintains the temperature at the bottom of the opening and closing screen 207, preventing the mulch film fragments accumulated on its top surface from melting and adhering due to excessively high temperatures.

[0033] The above description shows and illustrates the basic principles, main features, and advantages of the present invention. Standard parts used in the present invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0034] The above description of the disclosed embodiments enables those skilled in the art to make or use the 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 invention. Therefore, the 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 disclosed herein.

Claims

1. A harmless recycling and treatment device for agricultural mulch film, characterized in that: This includes air separation equipment, solid waste recovery equipment, dust suppression and recovery equipment, and extrusion melting equipment; The air separation equipment includes an air separation chamber (100), the solid recovery equipment includes a solid recovery mechanism (102), the dust suppression and recovery equipment includes a dust suppression and recovery mechanism (200), a spraying mechanism (300) and an air guiding mechanism (400), and the extrusion melting equipment includes an extrusion melting device (208). The dust suppression and recovery mechanism (200) further includes a spraying chamber (201) and a drying chamber (202). The rear air outlet of the air separation chamber (100) is fixedly connected to the spraying chamber (201), and the rear end of the spraying chamber (201) is fixedly connected to the drying chamber (202). A recovery conveyor belt (203) is vertically arranged between the spraying chamber (201) and the drying chamber (202). An air guide mechanism (400) is provided on the inner side of the recovery conveyor belt (203). A discharge chute (204) is provided at the bottom of the spraying chamber (201), and the left and right sides of the spraying chamber (201) are... A spraying mechanism (300) is provided on the side. A hot air blower (210) is fixedly connected to the top surface of the drying chamber (202). Three sets of inclined scrapers (209) are fixedly connected at equal intervals on the front side of the inner side of the drying chamber (202). The front end of the inclined scraper (209) is attached to the back of the recycling conveyor belt (203). A second recycling funnel (206) is fixedly connected to the bottom of the drying chamber (202). An opening and closing screen (207) is provided on the top surface of the second recycling funnel (206). An extrusion melting device (208) is provided at the lower end of the second recycling funnel (206). A first motor (101) is fixedly connected to the center of the front side of the air separator (100). The output shaft of the first motor (101) passes through and is rotatably connected to the inner front side of the air separator (100). The output shaft of the first motor (101) is fixedly connected to the front end of a transmission shaft (103). The transmission shaft (103) passes through and is rotatably connected to the inner central shaft of the air separator (100). A fan (104) is fixedly connected to the front end of the transmission shaft (103). A crushing blade (106) is fixedly connected to the rear end of the shaft (103). The front end of the transmission shaft (103) passes through and is rotatably connected to the through hole in the middle of the isolation net (105). The isolation net (105) is fixedly connected to the front of the inner side of the air classifier (100). A first scraper (107) is fixedly connected to the front end of the crushing blade (106). The front end of the crushing blade (106) is in contact with the back of the isolation net (105). An arc-shaped plug net (108) is provided at the bottom of the air classifier (100). The air guiding mechanism (400) includes: a hollow air guiding plate (401), the hollow air guiding plate (401) is provided on the inner side of the recycling conveyor belt (203), inclined air guiding cross plates (402) are fixedly connected at equal intervals on the front side of the hollow air guiding plate (401), a fan (403) is fixedly connected to the middle of the left and right sides of the hollow air guiding plate (401), and a first air guiding pipe (404) is fixedly connected to the side of the fan (403) on the right side of the hollow air guiding plate (401). A flat jet nozzle (405) is fixedly connected to the lower end of the air deflector (401). The front end of the flat jet nozzle (405) is fixedly connected to the side of the discharge port of the discharge trough (204). A second air guide pipe (406) is fixedly connected to the side of the fan (403) on the left side of the hollow air guide plate (401). An inclined jet plate (407) is fixedly connected to the lower end of the second air guide pipe (406). The inclined jet plate (407) is set on the inclined surface on the left and right sides inside the second recovery funnel (206). The solid recycling mechanism (102) includes: a first recycling funnel (109), the bottom of the air separation chamber (100) is fixedly connected to the first recycling funnel (109), the top surface of the first recycling funnel (109) is slidably connected to an arc-shaped knife holder (110), the inner side of the arc-shaped knife holder (110) is provided with multiple sets of arc-shaped scrapers at equal intervals, and the upper left and right sides of the arc-shaped knife holder (110) are fixedly connected to a transmission rod (111), the middle groove of the transmission rod (111) is connected to the short transmission shaft on the side of the transmission turntable (112), the center of the side of the transmission turntable (112) is fixedly connected to the output shaft of a second motor (113), and the second motor (113) is fixedly connected to the middle of the upper left and right sides of the first recycling funnel (109); The spraying mechanism (300) includes: a first transmission belt (301), the rear end of the transmission shaft (103) is fixedly connected to the center of the transmission wheel in the middle of the first transmission belt (301), the center of the front side of the transmission wheel on the left and right sides of the first transmission belt (301) is connected to the second transmission belt (304) through a bevel gear (303), the center of the upper transmission wheel of the second transmission belt (304) is fixedly connected to the spray head (305), and the spray head (305) is rotatably connected to the left and right sides inside the spraying chamber (201); The spray chamber (201) is fixedly connected to the left and right sides of the inner side of the spray chamber (201). The lower end of the second scraper (205) is in contact with the spray surface of the spray head (305). The first transmission belt (301) is installed on the front side of the mounting plate (302). The center of the back of the transmission wheel of the left and right parts of the first transmission belt (301) is fixedly connected to the connecting long shaft (306). The rear end of the connecting long shaft (306) is fixedly connected to the lower transmission wheel of the third transmission belt (307). The center of the upper transmission wheel of the third transmission belt (307) is fixedly connected to the rear end of the reciprocating screw (308). The rear end of the reciprocating screw (308) is threadedly connected to the left and right end through holes of the connecting crossbar (309). The left and right ends of the connecting crossbar (309) are slidably connected to the left and right sides of the discharge trough (204). A trapezoidal scraper (310) is installed at the bottom of the connecting crossbar (309). The bottom of the trapezoidal scraper (310) is in contact with the bottom of the discharge trough (204). The lower part of the second transmission belt (304) is rotatably connected to the short plates installed on the left and right sides of the spray chamber (201). The mounting crossbar (302) is fixedly connected to the bottom of the spray chamber (201). The upper transmission wheel of the third transmission belt (307) is rotatably connected to the reciprocating screw (308) inside the two side walls of the spray chamber (201). The inner side of the arc-shaped blade holder (110) has multiple sets of arc-shaped scrapers that fit against the bottom of the arc-shaped mesh (108). The side of the recycling conveyor belt (203) is triangular with its front side being an inclined surface. The upper end of the recycling conveyor belt (203) has a certain gap with the top surface of the spray chamber (201). The recycling conveyor belt (203) is made of a waterproof and breathable membrane. The front side of the hollow air guide plate (401) and the inclined air guide plate (402) have a certain gap with the inner front side of the recycling conveyor belt (203). The opening and closing screen (207) is driven by a motor to open and close. The lower end collection trough of the second recycling funnel (206) is rotatably connected to the auger of the extrusion melting device (208). The left and right sides of the back of the inclined scraper (209) are provided with guide blocks, and the back guide surface is trapezoidal. The bottom of the discharge port of the discharge trough (204) is provided with a rotary ash discharge valve.

2. A method for the harmless recycling and high-value utilization of agricultural mulch film, comprising the harmless recycling and processing equipment for agricultural mulch film as described in claim 1, characterized in that: Includes the following steps: Step 1: Separate soil clods and debris mixed with plastic film fragments using an air separation device; Step 2: Use solid waste recycling equipment to recover most of the larger soil clods and debris; Step 3: A large airflow is generated by the air separation equipment to blow the dust and mulch film fragments separated during the crushing process into the dust suppression and recycling equipment; Step 4: The dust in the airflow is suppressed and recovered by the spraying part of the dust suppression and recovery equipment, and degradation reagents are sprayed on the mulch film fragments; Step 5: The dust suppression and recovery equipment guides the airflow and recovers the mulch film fragments in the airflow through the transmission section and the air guide section. Step Six: Dry the plastic film fragments using the drying section of the dust suppression and recycling equipment; Step 7: Reuse the airflow through the air guide section of the dust suppression and recovery equipment to reduce sludge blockage at the bottom of the spraying section; Step 8: The plastic film fragments are extruded, melted, shaped, and reused using an extrusion melting device; Step 9: The airflow is reused through the air guide section of the dust suppression and recovery equipment to maintain the temperature at the bottom of the drying section.

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