Mulch film recycling and straw cleaning equipment and method in a residue film post-processing process

Abstract

This invention discloses a plastic film recycling and straw cleaning device and method in a residual film post-processing technology. It includes a frame and a recycling and cleaning mechanism mounted on the frame. The recycling and cleaning mechanism contains a main roller, a secondary roller, and a second film-brushing roller. Both the main roller and the secondary roller are horizontally rotatably mounted inside the recycling and cleaning mechanism. A plurality of hooking portions are densely distributed on the circumferential surface of the main roller and the secondary roller. The second film-brushing roller is located on one side of the main roller and the secondary roller, near the center. A second film outlet is located on one side of the recycling and cleaning mechanism near the second film-brushing roller, and a second straw outlet is located at the bottom of the recycling and cleaning mechanism. This invention is convenient to use and environmentally friendly, effectively separating straw and plastic film with good separation effect and high working efficiency, thus achieving efficient straw cleaning and plastic film recycling.

Description

Technical Field

[0001] This invention relates to the field of plastic film recycling technology, and in particular to a plastic film recycling and straw cleaning equipment and method in a residual film post-processing technology. Background Technology

[0002] Mulching technology has the effects of warming, drought resistance, and promoting root development, which can significantly increase crop yield and shorten the growing season. It is widely used, especially in arid regions, for cotton cultivation. However, the white pollution caused by residual film in the soil has become a serious problem, causing significant pollution and harm to the soil and environment.

[0003] The usual practice is to collect residual plastic film and straw from the field at the same time. However, since the plastic film and straw exist in the form of a mixture, it is difficult to completely separate the plastic film from the mixture for recycling. Existing technology lacks equipment and methods that can simultaneously recycle the plastic film in the mixture and clean up the straw. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a device and method for plastic film recycling and straw cleaning in the residual film post-processing technology, which can thoroughly separate straw and plastic film, effectively achieving straw cleaning and plastic film recycling.

[0005] To solve the above problems, the present invention is implemented through the following solution: A residual film post-processing technology includes a plastic film recycling and straw cleaning device, comprising a frame and a recycling and cleaning mechanism mounted on the frame. The recycling and cleaning mechanism has a main roller, a secondary roller, and a second film brushing roller inside. The main roller and the secondary roller are both horizontally rotatably mounted inside the recycling and cleaning mechanism. The circumferential surfaces of the main roller and the secondary roller are densely covered with a plurality of hooking parts. The second film brushing roller is located on one side of the main roller and the secondary roller near the middle. The recycling and cleaning mechanism has a second film outlet on one side of the second film brushing roller and a second straw outlet at the bottom of the recycling and cleaning mechanism.

[0006] Furthermore, it also includes a preliminary separation mechanism, which is located on top of the recycling and cleaning mechanism. The preliminary separation mechanism is mounted on a frame, and a housing is fixedly mounted on the frame. The housing encloses a separation chamber, with a feed inlet at the top and a first straw outlet and a first film outlet at the bottom. Inside the separation chamber, there is a rotating screen and a first film-brushing roller. Both the rotating screen and the first film-brushing roller are rotatable rollers with the same rotation direction. The first film-brushing roller has a plurality of uniformly distributed brushing sections, which are used to brush the film attached to the rotating screen off the rotating screen. The first film outlet is located below the first film-brushing roller, and the first straw outlet is located at the bottom of the separation chamber. The first straw outlet of the preliminary separation mechanism is connected to the inlet of the recycling and cleaning mechanism.

[0007] Preferably, the hook part is inclined to one side along the rotation direction of the roller, and the angle α between the axis of the hook part and the radial direction of the roller is 12° to 80°.

[0008] Furthermore, the second brushing roller is evenly provided with a plurality of brushing sections, one end of which is fixed on the second brushing roller, and the other end is a free end that is in contact with the main roller or the secondary roller.

[0009] Furthermore, the recycling and cleaning mechanism is provided with a baffle on the side away from the second brush roller. One end of the baffle is fixed to the inner wall of the recycling and cleaning mechanism, and the other end is provided with a steel brush that extends to the main roller and the slave roller.

[0010] Furthermore, it also includes a loosening roller, which is disposed at the inlet of the recycling and cleaning mechanism.

[0011] Furthermore, the opening roller is provided with a plurality of U-shaped plates, which are fixedly or detachably mounted on the opening roller, and the U-shaped plates are toothed or sawtooth-shaped.

[0012] Furthermore, at least two sets of recycling and cleaning mechanisms are provided below the preliminary separation mechanism. The two sets of recycling and cleaning mechanisms are a first recycling and cleaning mechanism and a second recycling and cleaning mechanism, and the inlet of the second recycling and cleaning mechanism is connected to the end of the membrane channel.

[0013] This invention also provides a method for recycling plastic film and cleaning straw in the post-processing of residual plastic film, comprising the following steps: Step S1, Preliminary Separation: The mixture of straw and film is fed into the separation chamber through the feed inlet of the straw-film separator. Under the rotation of the rotating screen, the lighter film is adsorbed onto the screen, while the heavier straw mixture with a small amount of film falls into the discharge mechanism at the first straw outlet and is discharged from the first straw outlet. The film adsorbed on the screen is brushed off the screen by the first brushing roller and falls to the discharge mechanism located below the first brushing roller. The mixture of film with a small amount of straw is sent to the first film outlet through the discharge mechanism and discharged, completing the preliminary separation of straw and film.

[0014] Step S2, Recycling and Cleaning: The mixture of straw and a small amount of film enters from the inlet of the recycling and cleaning mechanism. The high-speed rotation of the main roller and the driven roller causes the hooking part on the outer surface of the roller to hook the film and separate it from the straw. The film is attached to the outer surface of the roller. The second brushing roller, which rotates in the opposite direction to the main roller and the driven roller, brushes the film attached to the roller off the two rollers. The straw is thrown out under the action of centrifugal force. The separated film is discharged from the second film outlet, and the straw is discharged from the second straw outlet, completing the cleaning of straw and recycling of film.

[0015] Furthermore, before step S1, there is a step S0, heavy impurity cleaning: before the straw film separator, the heavy impurity is first processed by the heavy impurity cleaner to remove the heavier impurities.

[0016] Compared with existing technologies, this invention is convenient to use and environmentally friendly. It can thoroughly separate straw and film, with good separation effect and high work efficiency, and can effectively achieve straw cleaning and film recycling. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the preliminary separation mechanism of the present invention.

[0019] Figure 3 This is a schematic diagram of the recycling and cleaning mechanism of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the first brush roller of the present invention.

[0021] Figure 5 This is a schematic diagram of the material discharge mechanism of the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of the main roller and the slave roller of the present invention.

[0023] Figure 7 yes Figure 6 A magnified structural diagram of point A in the diagram.

[0024] Figure 8 This is a schematic diagram of the opening roller of the present invention.

[0025] Figure 9 This is a schematic diagram of the structure when the recycling and cleaning mechanism of the present invention has two parts.

[0026] In the diagram: 1 is the frame; 21 is the housing; 22 is the separation chamber; 23 is the feed inlet; 24 is the first straw outlet; 25 is the first film outlet; 26 is the rotating screen; 27 is the first film brushing roller; 271 is the film brushing section; 28 is the discharge mechanism; 281 is the rotating shaft; 282 is the discharge plate; 283 is the guide section; 29 is the steel brush; 31 is the main roller; 311 is the hook section; 32 is the secondary roller; 33 is the second film brushing roller; 34 is the second film outlet; 35 is the second straw outlet; 36 is the auger; 37 is the opening roller; 371 is the U-shaped plate; 38 is the baffle; 39 is the rod removal bar; 301 is the first recycling and cleaning mechanism; 302 is the second recycling and cleaning mechanism; 4 is the film channel. Detailed Implementation

[0027] The preferred embodiments of the present invention are described in detail below.

[0028] Example 1: Refer to Figures 1 to 9A film recycling and straw cleaning device in a residual film post-processing technology includes a frame 1 and a recycling and cleaning mechanism mounted on the frame 1. At least one recycling and cleaning mechanism can be provided, or multiple mechanisms can be provided as needed. The recycling and cleaning mechanism internally includes a main roller 31, a secondary roller 32, and a second film brushing roller 33. Both the main roller 31 and the secondary roller 32 are horizontally rotatably mounted inside the recycling and cleaning mechanism. A plurality of hooking parts 311 are densely distributed on the circumferential surface of the main roller 31 and the secondary roller 32. The hooking parts 311 are inclined to one side along the rotation direction of the roller, allowing them to better hook the film. The angle α between the axis of the hooking part 311 and the radial direction of the roller is 12° to 80°. The hooking part 311 can be one of a pin, a barb, or a barbed strip. The secondary roller 32 is located below the main roller 31, and a gap is provided between the hooking parts 311 of the secondary roller 32 and the hooking parts 311 of the main roller 31. The second brushing roller 33 is positioned near the center on one side of the main roller 31 and the slave roller 32, enabling it to simultaneously brush the film attached to both rollers off the main roller 31 and the slave roller 32. The second brushing roller 33 has the same structure as the first brushing roller 27, i.e., it has a plurality of brushing portions 271 evenly distributed on it. One end of each brushing portion 271 is fixed to the second brushing roller 33, and the other end is a free end that contacts either the main roller 31 or the slave roller 32. The brushing portion 271 is used to brush the film attached to the rollers off the two rollers. Preferably, the brushing portion 271 is a brush. The recycling and cleaning mechanism has a baffle 38 on the side away from the second brush roller 33. One end of the baffle 38 is fixed to the inner wall of the recycling and cleaning mechanism, and the other end is equipped with a steel brush 29 extending to the main roller 31 and the secondary roller 32. The baffle 38 is used to guide the straw processed by the main roller 31 to the secondary roller 32 for further processing. The steel brush 29 is made of elastic material, allowing the straw to pass through while blocking the film. The main roller 31, the secondary roller 32, and the second brush roller 33 rotate at a uniform speed driven by a motor. The main roller 31 and the secondary roller 32 rotate in the same direction, while the second brush roller 33 rotates in the opposite direction to both the main roller 31 and the secondary roller 32. The main roller 31, the secondary roller 32, and the second brush roller 33 can also be connected to a frequency converter to control their rotation speed, thereby achieving better separation and recycling effects. The recycling and cleaning mechanism has a second film outlet 34 on one side of the second film brush roller 33 for discharging the film. The bottom of the recycling and cleaning mechanism has a second straw outlet 35, and below the second straw outlet 35 is an auger 36, from which the straw is finally discharged, thereby separating the straw from the mixture.It also includes several destalking bars 39, which are spaced around the main roller 31 and the secondary roller 32. The function of the destalking bars 39 is to adhere to the film and impact the straw when the rollers are running at high speed, and to beat the mixture of straw and film multiple times to fully expose the straw, making it easier to clean out the straw.

[0029] Furthermore, it also includes a preliminary separation mechanism, which is located on top of the recycling and cleaning mechanism. The preliminary separation mechanism is mounted on a frame 1, and a conical shell 21 is fixedly mounted on the frame 1. The shell 21 encloses a separation chamber 22. A feed inlet 23 is located above the separation chamber 22, and a first straw outlet 24 and a first film outlet 25 are located below the separation chamber 22. Inside the separation chamber 22, there is a rotating screen 26 and a first film-brushing roller 27. Both the rotating screen 26 and the first film-brushing roller 27 are rotatable rollers rotating in the same direction. The first film-brushing roller 27 has a plurality of uniformly distributed brushing sections 271. One end of each brushing section 271 is fixed to the first film-brushing roller 27, and the other end is a free end in contact with the rotating screen 26. The brushing section 271 is used to brush the film attached to the rotating screen 26 off the rotating screen 26. Preferably, the brushing section 271 is a bristle brush. The first film outlet 25 is located below the first brushing roller 27, and the first straw outlet 24 is located at the bottom of the separation chamber 22. Both the first straw outlet 24 and the first film outlet 25 are equipped with a discharge mechanism 28. The discharge mechanism 28 is used to deliver the straw or the brushed film to the outlet. The discharge mechanism 28 includes a rotatable shaft 281 and a discharge plate 282. One end of the discharge plate 282 is fixedly connected to the shaft 281, and the other end is fixedly provided with a guide part 283. The guide part 283 can be a cuboid structure or a plate-like structure with hooks. The direction of the hooks of the plate-like structure is the same as the rotation direction of the shaft 281, which facilitates hooking the film and feeding it into the first film outlet 25. The discharge mechanism 28 can also preferably be an airlock, which is a complete set of equipment and is easier to install. Furthermore, the rotation direction of the discharge mechanism 28 located at the first film outlet 25 is opposite to the rotation direction of the rotating screen 26. The rotating screen 26, the first film-brushing roller 27, and the discharge mechanism 28 can all be connected to frequency converters. The frequency converters can control the operating speed of the rotating screen 26, the first film-brushing roller 27, and the discharge mechanism 28, achieving better separation results and saving electricity. Furthermore, a controller can be provided, electrically connected to the frequency converter, allowing for convenient intelligent control of the operating speed of the rotating screen 26, the first film-brushing roller 27, and the discharge mechanism 28. In use, the mixture containing straw and film is fed into the separation chamber 22 inside the housing 21 through the inlet 23. As the rotating screen 26 rotates, the lighter film is adsorbed onto the screen, while the heavier mixture of straw and a small amount of film falls directly into the discharge mechanism 28 at the first straw outlet 24 and is discharged from the first straw outlet 24. The film adsorbed on the rotating screen 26 is continuously brushed off the rotating screen 26 by the brushing part 271 on the first brushing roller 27 and falls to the discharge mechanism 28 located below the first brushing roller 27. The mixture of film and a small amount of straw is sent to the first film outlet 25 through the discharge mechanism 28 and discharged, thus completing the initial separation of straw and film.Of course, before separation, the mixture of straw and film can be cleaned by removing heavier impurities. This can be done in the process prior to the straw-film separator, removing stones and other heavier impurities, thus improving the cleaning and recycling efficiency of subsequent processes. After this cleaning, the mixture containing straw and film is then fed into the straw-film separator for further processing.

[0030] Furthermore, it also includes a loosening roller 37, which is installed at the inlet of the recycling and cleaning mechanism. The loosening roller 37 has several U-shaped plates 371, which are fixedly or detachably mounted on it. The U-shaped plates 371 are toothed or serrated, resulting in better loosening effect. The loosening roller 37 can be used to loosen the mixture of straw and a small amount of film falling into the inlet of the recycling and cleaning mechanism, thus improving the subsequent cleaning and recycling results. Furthermore, a film channel 4 is also provided, with the first film outlet 25 and the second film outlet 34 respectively connected to the film channel 4. The film channel 4 facilitates the centralized discharge of the film separated by the preliminary separation mechanism and the recycling and cleaning mechanism.

[0031] After processing by the preliminary separation and recycling / cleaning mechanisms, most of the film can be recovered from the mixture. If, as needed, the film still contains a significant amount of straw after separation, at least one additional recycling / cleaning mechanism can be added below the preliminary separation mechanism. This means at least two recycling / cleaning mechanisms are installed below the preliminary separation mechanism: a first recycling / cleaning mechanism 301 and a second recycling / cleaning mechanism 302. The inlet of the second recycling / cleaning mechanism 302 is connected to the end of the film channel 4, sending the film separated by the preliminary separation and first recycling / cleaning mechanisms 301 into the second recycling / cleaning mechanism 302 for secondary recycling and cleaning, thereby improving the purity of the recovered film. Of course, more recycling / cleaning mechanisms can be added depending on the cleaning situation, until the required cleaning level is achieved.

[0032] In operation, a mixture of straw and a small amount of film enters the recycling and cleaning mechanism through the inlet. Due to the high-speed rotation of the main roller 31 and the secondary roller 32, the hooking part 311 on the outer surface of the rollers hooks the film and separates it from the straw. The film adheres to the outer surface of the rollers, and the second brushing roller 33, rotating in the opposite direction to the main roller 31 and the secondary roller 32, continuously brushes the film off the rollers. The entire process involves two cleaning cycles: one with the main roller 31 and the other with the secondary roller 32. More rollers can be added as needed for better cleaning results. The straw is then thrown out by centrifugal force. The separated film is discharged from the second film outlet 34, while the straw is discharged from the auger 36 located below the second straw outlet 35. This achieves both straw cleaning and film recycling.

[0033] This invention is convenient to use and environmentally friendly. It can thoroughly separate straw and film, with good separation effect and high work efficiency, and can effectively achieve straw cleaning and film recycling.

[0034] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "inner side," "outer side," "top," "end," and "one side," 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, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Obviously, the above description is merely one embodiment of the present invention, and not all embodiments. Any other modifications or equivalent substitutions made by those skilled in the art based on the embodiments of the present invention, as long as they do not depart from the spirit and scope of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A plastic film recycling and straw cleaning device in a residual film post-processing technology, characterized in that: The device includes a frame (1) and a recycling and cleaning mechanism mounted on the frame (1). The recycling and cleaning mechanism has a main roller (31), a slave roller (32), and a second brushing roller (33) inside. The main roller (31) and the slave roller (32) are both horizontally rotatably mounted inside the recycling and cleaning mechanism. A plurality of hooks (311) are densely arranged on the circumferential surface of the main roller (31) and the slave roller (32). The second brushing roller (33) is located on one side of the main roller (31) and the slave roller (32) near the main roller (31) and the slave roller (32). At the middle position; the recycling and cleaning mechanism is provided with a second film outlet (34) on one side of the second brush roller (33), and a second straw outlet (35) is provided at the bottom of the recycling and cleaning mechanism. It also includes a preliminary separation mechanism, which is set at the top of the recycling and cleaning mechanism. The preliminary separation mechanism is set on the frame (1), and a housing (21) is fixedly provided on the frame (1). The housing (21) encloses and forms a separation chamber (22). A feed inlet (23) is provided above the separation chamber (22). The separation chamber (22) is provided with a first straw outlet (24) and a first film outlet (25) below it; the separation chamber (22) is provided with a rotating screen (26) and a first film brushing roller (27), both of which are rotatable roller structures and rotate in the same direction; the first film brushing roller (27) is provided with a plurality of film brushing parts (271) evenly distributed on it, which are used to brush the film attached to the rotating screen (26) off the rotating screen (26); the first film outlet (25) is located below the first brushing roller (27), and the first straw outlet (24) is located at the bottom of the separation chamber (22). The first straw outlet (24) of the preliminary separation mechanism is connected to the inlet of the recycling and cleaning mechanism; it also includes a loosening roller (37), which is located at the inlet of the recycling and cleaning mechanism. The loosening roller (37) is provided with a plurality of U-shaped plates (371), which are fixedly or detachably mounted on the loosening roller (37). The forming plate (371) is toothed or sawtooth-shaped. The recycling and cleaning mechanism is provided with a baffle (38) on the side away from the second brush roller (33). One end of the baffle (38) is fixed on the inner wall of the recycling and cleaning mechanism, and the other end is provided with a steel brush (29) that extends to the main roller (31) and the secondary roller (32). The steel brush (29) is made of elastic material and also includes several rod removers (39). The rod removers (39) are spaced around the main roller (31) and the secondary roller (32).

2. The plastic film recycling and straw cleaning equipment in a residue film post-processing process according to claim 1, characterized in that: The hook part (311) is inclined to one side along the rotation direction of the roller, and the angle α between the axis of the hook part (311) and the radial direction of the roller is 12° to 80°.

3. The plastic film recycling and straw cleaning equipment in a residue film post-processing process according to claim 1, characterized in that: The second brushing roller (33) is uniformly provided with a plurality of brushing parts (271). One end of the brushing part (271) is fixed on the second brushing roller (33), and the other end is a free end that is in contact with the main roller (31) or the secondary roller (32).

4. The equipment for recycling plastic film and cleaning straw in the residual film post-processing process according to claim 1, characterized in that: At least two recycling and cleaning mechanisms are provided below the preliminary separation mechanism. The two recycling and cleaning mechanisms are a first recycling and cleaning mechanism (301) and a second recycling and cleaning mechanism (302). The inlet of the second recycling and cleaning mechanism (302) is connected to the end of the membrane channel (4).

5. A method for recycling plastic film and cleaning straw in a residual film post-processing technology, characterized in that: Includes the following steps: Step S1, Preliminary Separation: The mixture of straw and film is fed into the separation chamber (22) from the feed port (23) of the straw-film separator. Under the rotation of the rotating screen (26), the lighter film is adsorbed onto the rotating screen (26), while the heavier mixture of straw and film falls into the discharge mechanism (28) at the first straw outlet (24) and is discharged from the first straw outlet (24). The film adsorbed on the rotating screen (26) is brushed off the rotating screen (26) by the first brushing roller (27) and falls to the discharge mechanism (28) located below the first brushing roller (27). The mixture of film and straw is fed into the first film outlet (25) through the discharge mechanism (28) and discharged, thus completing the preliminary separation of straw and film. Step S2, Recycling and Cleaning: The mixture of straw and a small amount of film enters from the inlet of the recycling and cleaning mechanism. The high-speed rotation of the main roller (31) and the secondary roller (32) causes the hook part (311) on the outer surface of the roller to hook the film and separate it from the straw. The film is attached to the outer surface of the roller. The second brushing roller (33), which rotates in the opposite direction to the main roller (31) and the secondary roller (32), brushes the film attached to the roller off the two rollers. The straw is thrown out under the action of centrifugal force. The separated film is discharged from the second film outlet (34), and the straw is discharged from the second straw outlet (35), completing the cleaning of straw and recycling of film.

6. The method for recycling plastic film and cleaning straw in the residual film post-treatment process according to claim 5, characterized in that: Before step S1, there is step S0, heavy impurity cleaning: before the straw film separator, the heavy impurity cleaner is used to clean the heavier impurities.

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