A waste glass bottle recycling production line and a treatment method

Abstract

The application relates to a waste glass bottle recycling and regenerating production line and a treatment method, which comprises a conveying table and a chain plate conveyor, and the conveying table is provided with a rotary mechanical arm, a hot air blowing head, a first steam nozzle and a scraper; a pressure sensor is used for detecting the resistance of the scraper; a label scraping controller is configured to determine that label cleaning is completed when the pressure value detected by the pressure sensor increases and is maintained in a certain value range; and the label scraping controller is configured to determine that label cleaning is not completed locally or totally when the pressure value detected by the pressure sensor increases and suddenly drops within a set label scraping time, control the rotary mechanical arm to drive the glass bottle to reversely rotate to a starting position and continue to control the glass bottle to rotate forward. The application determines the label scraping state of the scraper through the pressure sensor and the label scraping controller, so that the scraper can comprehensively and effectively scrape the label, the accuracy and efficiency of label cleaning are improved, and a good foundation is provided for subsequent glass bottle recycling and regenerating treatment.

Description

Technical Field

[0001] This application relates to the technical field of recycling and regeneration production lines, and in particular to a waste glass bottle recycling and regeneration production line and processing method. Background Technology

[0002] With economic development and rising consumption levels, the amount of waste glass bottles generated is increasing day by day. Waste glass bottle recycling is an important part of the circular economy. The global annual processing volume exceeds 50 million tons, which can reduce raw material consumption by 40% and carbon emissions by 25%.

[0003] Typically, waste glass bottles are collected and transported to recycling plants, where they undergo cleaning, sorting, crushing, and melting to ultimately produce new glass products. Currently, high-pressure water guns or ultrasonic cleaning equipment are used to remove surface contaminants such as food residue, but their effectiveness in removing labels and adhesives is limited. Furthermore, incompletely removed paper labels and residual adhesive, along with glass fragments, are compressed by an eccentric wheel after crushing to form multi-layered composite materials, such as paper-adhesive-glass mixtures. These mixtures have densities close to glass, making them difficult to separate during subsequent cleaning. Moreover, the thermal decomposition of these composite materials during melting produces gases such as CO2 and HCl, leading to foaming of the molten glass and defects such as bubbles and streaks in the finished product, resulting in a 15%-20% decrease in mechanical properties. Additionally, removing impurities requires increasing the melting temperature or extending the melting time, which increases energy consumption, reduces production capacity, and is economically unsustainable.

[0004] Chinese patent application number CN201911028005.4 discloses a waste glass bottle recycling production line and processing method. The production line includes a chain conveyor, a bottle-feeding and cap-collecting turntable, a capping machine, a sorting control box, a cylinder pusher, a tilting guide rail, a residual liquid collection box, and a crushing and washing machine. The processing method is as follows: the chain conveyor transports waste glass bottles to the bottle-feeding and cap-collecting turntable, directly below the capping head of the capping machine. A bottle-fixing cylinder clamps the waste glass bottle body, and the capping head clamps the cap and performs the capping. The capped waste glass bottles are then transported to the sorting control box where a camera takes a picture and sorts them based on color recognition. The bottles are then pushed into the corresponding tilting guide rail to empty the residual liquid. The waste glass slides into the crushing and washing machine, where it is crushed by an eccentric wheel and washed with water. Finally, the glass fragments are collected at the glass bottle fragment outlet. This waste glass bottle recycling production line can automatically recycle and process waste glass bottles of various sizes, reducing the labor intensity of workers and improving production efficiency.

[0005] The aforementioned technologies have the following drawbacks: the production line only uses a chain conveyor and sorting control box to achieve transportation and color sorting, without setting up a pretreatment step for surface adhesives such as labels and tapes. This leads to impurities being mixed in during the subsequent crushing process. After crushing, these impurities mix with glass fragments and may form a difficult-to-separate composite material after being squeezed by the eccentric wheel, affecting the quality of recycled glass melting. Summary of the Invention

[0006] To address the issue that the aforementioned production line lacks a pretreatment step for substances adhering to the bottle surface, resulting in impurities mixing with glass fragments after breakage and being difficult to separate, thus affecting the quality of recycled glass melting, this application provides a waste glass bottle recycling production line and processing method.

[0007] The first aspect of this application provides a waste glass bottle recycling and regeneration production line using the following technical solution:

[0008] A waste glass bottle recycling production line includes a conveyor table and a chain conveyor, wherein the conveyor table is equipped with:

[0009] A rotary robotic arm is used to grip glass bottles on the chain conveyor and drive the glass bottles to rotate.

[0010] A hot air nozzle is installed on the fixed part of the rotary robotic arm and is used to extend into the glass bottle held on the rotary robotic arm and spray hot air onto the inner wall of the glass bottle.

[0011] The first steam nozzle is located on the conveyor platform and is positioned opposite to the hot air nozzle to spray high-temperature steam onto the outer wall of the glass bottle held on the rotary robotic arm. The spraying direction is opposite to the direction of rotation of the glass bottle.

[0012] A scraper is placed on the conveyor table and pressed against the outer wall of the glass bottle held on the rotary robotic arm. The scraper is located on the side of the first steam nozzle opposite to the direction of rotation of the glass bottle and is tangential to the direction of rotation of the glass bottle.

[0013] A pressure sensor is located between the scraper and the conveyor table and is used to detect the resistance when the scraper removes the label;

[0014] The label scraping controller, connected to the pressure sensor and the rotary robotic arm, is configured to determine that the label cleaning is complete when the pressure value detected by the pressure sensor increases and remains within a certain range within a set label scraping time; and to determine that the label is not completely or partially cleaned when the pressure value detected by the pressure sensor increases and then drops sharply within a set label scraping time, thereby controlling the rotary robotic arm to drive the glass bottle to rotate in the opposite direction to the starting position and continuing to control the glass bottle to rotate in the forward direction.

[0015] The scratching time is the time it takes for the scraper to completely cover the entire label surface as the glass bottle rotates, and the starting position is the position of the steam nozzle corresponding to the edge of the label on the opposite side of the glass bottle's rotation direction.

[0016] Furthermore, it also includes:

[0017] An industrial camera, together with the rotary robotic arm, is connected to a rotary controller. The rotary controller is configured to determine the edge position of the glass bottle label based on the image of the glass bottle's outer wall captured by the industrial camera, and control the rotary robotic arm to drive the glass bottle to rotate to the starting position.

[0018] Furthermore, it also includes:

[0019] A second steam nozzle is disposed on the conveyor platform and its spray direction is directed towards the tip of the scraper. The second steam nozzle is disposed on the side of the scraper away from the first steam nozzle.

[0020] Furthermore, a scraper holder is installed on the conveyor table, the first steam nozzle is hinged to the scraper holder, the scraper and the second steam nozzle are installed on the scraper holder, and an angle adjustment component for adjusting the flip angle of the first steam nozzle is provided on the scraper holder. The angle adjustment component and the pressure sensor are connected to an angle adjustment controller.

[0021] The angle adjustment controller is configured to, when the pressure sensor detects a value greater than zero, control the angle adjustment assembly to drive the first steam nozzle to rotate so that its spray direction is opposite to the direction of rotation of the glass bottle; and when the pressure sensor detects a value of zero, control the angle adjustment assembly to drive the first steam nozzle to rotate so that its spray direction is directed toward the tip of the cutter on the side away from the second steam nozzle.

[0022] Furthermore, the angle adjustment component includes:

[0023] An elastic element is provided at the hinge point between the first steam nozzle and the scraper seat. In the initial state, the spray direction of the first steam nozzle is directed towards the tip of the cutter on the side away from the second steam nozzle.

[0024] An electromagnet is mounted on a scraper holder. A permanent magnet corresponding to the electromagnet and magnetically repelling the electromagnet is fixed to the first steam nozzle. The electromagnet is connected to the angle adjustment controller. The angle adjustment controller is configured to control the electromagnet to be energized when the pressure sensor detects a value greater than zero.

[0025] Furthermore, it also includes:

[0026] A biological enzymatic hydrolysis tank is located on the side of the conveyor platform away from the scraper, and is used to enzymatically hydrolyze the labels and glue remaining on the glass bottles after the labels have been scraped off.

[0027] Furthermore, the industrial camera and the rotary robotic arm are both connected to a stroke controller. The stroke controller is configured to determine whether there are residual labels and glue on the glass bottle based on the image of the outer wall of the glass bottle captured by the industrial camera, and control the rotary robotic arm to put the glass bottle with residual labels and glue into the bio-enzymatic hydrolysis tank.

[0028] Furthermore, it also includes:

[0029] A collection box, located below the label removal seat on the conveyor platform, is used to collect waste generated during the label removal process. The collection box is equipped with a filter screen at an angle to separate the solid and liquid components of the waste.

[0030] Furthermore, the inner periphery of the collection box is equipped with a shielding cover to prevent splashes or vapors generated during label removal from escaping. A funnel-shaped guide plate is fixed to the lower end of the shielding cover, with the cone apex of the guide plate pointing downwards. The collection box is equipped with a lifting component for driving the shielding cover to move up and down, and the lifting component is connected to the rotary controller.

[0031] When the rotary controller determines that the label cleaning operation has started, it controls the lifting mechanism to raise the shielding cover. When the rotary controller determines that the label cleaning operation has been completed, it controls the lifting mechanism to lower the shielding cover back to its initial position.

[0032] The processing method of a waste glass bottle recycling production line provided in the second aspect of this application adopts the following technical solution:

[0033] A method for processing waste glass bottles in a recycling production line includes the following steps:

[0034] S1. The waste glass bottles are initially classified according to color and shape, and non-glass impurities such as metal caps and plastic labels and broken glass bottles are removed. The screened waste glass bottles with non-fully wrapped paper labels are placed on the chain conveyor.

[0035] S2. The rotary robotic arm clamps the glass bottle and the hot air nozzle sprays hot air onto the inner wall of the label corresponding to the clamped glass bottle to soften the adhesive between the waste glass bottle and the label.

[0036] S3. The first steam nozzle simultaneously sprays high-temperature steam onto the edge of the glass bottle label held on the rotary robotic arm, and the scraper is pressed against the outer wall of the glass bottle. Then the rotary robotic arm drives the glass bottle to rotate so that the scraper can scrape off the label on the glass surface.

[0037] S4. During the label scraping process, the pressure sensor detects the label scraping resistance of the scraper in real time. When the pressure value detected by the pressure sensor increases and remains within a certain range within the set scraping time, it is determined that the label cleaning is completed. When the pressure value detected by the pressure sensor increases and then drops sharply within the set scraping time, it is determined that the label has not been partially or completely cleaned. The rotary robotic arm drives the glass bottle to rotate in the opposite direction to the starting position and continues to control the glass bottle to rotate forward.

[0038] S5. After the label is scraped off, the rotary robotic arm places the glass bottle with residual label and glue into a bio-enzymatic hydrolysis tank for dissolving the residual glue;

[0039] S6. The rotary robotic arm grips the next glass bottle and repeats steps S2 to S5.

[0040] In summary, the beneficial technical effects of this application are as follows:

[0041] 1. By working together with the hot air nozzle, the first steam nozzle and the second steam spray, the adhesion between the label and the glass bottle is effectively reduced, and the label and adhesive are softened by heat, which reduces the difficulty of cleaning the label;

[0042] 2. By linking the industrial camera with the rotary controller, the scraper can be accurately inserted into the gap between the label edge and the bottle body at the starting position, ensuring that the scraper can completely and effectively remove the label when the glass bottle is rotated under the drive of the rotary robotic arm, thereby improving the accuracy and efficiency of label cleaning.

[0043] 3. Through the ingenious design of the elastic element and electromagnet in the angle adjustment component, the waste glass bottle recycling production line can accurately and automatically adjust the spray direction of the first steam nozzle according to the actual working state of label cleaning. This not only provides effective steam assistance during label cleaning, but also thoroughly sprays and washes the scraper after cleaning, improving the automation level and label cleaning quality of the production line and ensuring the stable operation of the production line.

[0044] 4. Through the coordinated operation of industrial cameras, rotary robotic arms, stroke controllers, label scraping controllers, and bio-enzymatic hydrolysis tanks, the production line can more accurately handle the label and glue residue problems on waste glass bottles, improving the recycling quality of waste glass bottles and providing more favorable conditions for subsequent processing. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall structure in the initial state of an embodiment of this application;

[0046] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0047] Figure 3 This is a schematic diagram of the overall structure of the label cleaning state in the application embodiment;

[0048] Figure 4 It is along Figure 1 A partial cross-sectional view of the middle BB line;

[0049] Figure 5 yes Figure 3 A magnified view of part C in the diagram.

[0050] Explanation of reference numerals in the attached drawings: 1. Conveyor table; 11. Rotary robotic arm; 111. Hot air nozzle; 12. Industrial camera; 2. Chain conveyor; 3. Scraper holder; 31. First steam nozzle; 311. Elastic element; 312. Permanent magnet; 32. Pressure sensor; 33. Scraper; 34. Second steam nozzle; 35. Electromagnet; 4. Bio-enzyme hydrolysis tank; 5. Collection box; 51. Filter screen; 52. Lifting component; 6. Shielding cover; 61. Guide plate. Detailed Implementation

[0051] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] This application discloses a waste glass bottle recycling production line. (Refer to...) Figure 1 and Figure 2 A waste glass bottle recycling production line includes a conveyor table 1 and a chain conveyor 2. The production line of this application also includes a secondary scraper, a crushing and screening machine, a melting and forming furnace, etc., which are conventional technical means and will not be described in detail here.

[0053] The conveyor table 1 is equipped with:

[0054] The rotary robotic arm 11 is an electric or pneumatic robotic arm with clamping and rotation functions. It is a conventional technical means and will not be described in detail here. The rotary robotic arm 11 is used to clamp the mouth of glass bottles on the conveyor and drive the glass bottles to rotate in both directions.

[0055] A hot air nozzle 111 is mounted on the fixed part of the rotary robotic arm 11 and is used to extend into the glass bottle held on the rotary robotic arm 11 and spray hot air onto the inner wall of the glass bottle. The hot air sprayed can be 60℃ to 100℃. The lower end face of the hot air nozzle 111 is lower than the lower end face of the gripper on the robotic arm.

[0056] The first steam nozzle 31 is located on the conveyor table 1 and is positioned opposite to the hot air nozzle 111 to spray high-temperature steam onto the glass bottle held on the rotary robotic arm 11. The spraying direction is opposite to the rotation direction of the glass bottle.

[0057] The scraper 33 is located on the conveyor table 1 and abuts against the outer wall of the glass bottle held by the rotary robotic arm 11. The scraper 33 is located on the side of the first steam nozzle 31 that is opposite to the direction of rotation of the glass bottle and is tangential to the direction of rotation of the glass bottle.

[0058] Pressure sensor 32 is located between scraper 33 and conveyor table 1 and is used to detect the resistance when scraper 33 scrapes off the label.

[0059] The label-scraping controller, connected to the pressure sensor 32 and the rotary robotic arm 11, is configured to determine that the label cleaning is complete when the pressure value detected by the pressure sensor 32 increases and remains within a certain range within a set label-scraping time; and to determine that the label is not completely or partially cleaned when the pressure value detected by the pressure sensor 32 increases and then drops sharply within the set label-scraping time, thereby controlling the rotary robotic arm 11 to drive the glass bottle to rotate in the opposite direction to the starting position and continuing to control the glass bottle to rotate forward.

[0060] The labeling time is the duration for the scraper 33 to completely cover the entire label area when the glass bottle rotates. The starting position is the position corresponding to the edge of the label on the opposite side of the glass bottle's rotation direction, as indicated by the steam nozzle. It should also be clarified that the production line of this application is designed to process glass bottles with non-fully wrapped paper labels, specifically, labels that do not completely cover the circumference of the glass bottle and have at least two edge positions on the circumference of the glass bottle.

[0061] In this way, the screened waste glass bottles with non-fully-wrapped paper labels are placed on the chain conveyor 2. When the glass bottle reaches the set position, the rotary robotic arm 11 moves down and clamps the glass bottle; at the same time, the hot air nozzle 111 extends into the glass bottle and sprays hot air onto the inner wall of the glass bottle, softening the adhesive on the back of the label and reducing the adhesion between the label and the glass bottle, creating favorable conditions for subsequent label cleaning. Simultaneously, the rotary robotic arm 11 clamps the glass bottle so that the outer wall of the glass bottle is pressed against the scraper 33, and the first steam nozzle 31 sprays high-heat steam onto the label of the glass bottle clamped on the rotary robotic arm 11, further softening the label and adhesive. Then, the rotary robotic arm 11 drives the clamped glass bottle to rotate. During the rotation of the glass bottle, the scraper 33 moves tangentially against the outer wall of the glass bottle relative to the glass bottle, scraping off the label on the glass bottle.

[0062] When the scraper 33 scrapes off the label on the glass bottle, as the label is gradually scraped off, the resistance between the scraper 33 and the glass bottle will first increase and be detected by the pressure sensor 32. Then, within the set scraping time, the pressure value detected by the pressure sensor 32 remains basically within a certain range. When the label is completely cleaned, the pressure value drops to close to the initial value, at which point the scraping controller determines that the label cleaning is complete.

[0063] When the pressure value detected by the pressure sensor 32 increases during the label scraping process and then suddenly drops within the set scraping time, it means that the scraper 33 has scratched the label and stuck it to the outside of the label at a certain moment. The label scraping controller determines that the label has not been cleaned in part or in whole. At this time, the label scraping controller controls the rotary robotic arm 11 to drive the glass bottle to rotate in the opposite direction to the edge position of the label on the opposite side of the glass bottle's rotation direction, so that the glass bottle returns to the initial stage of label cleaning. Then, the controller continues to control the glass bottle to rotate forward and restart the label cleaning process to ensure that the label can be completely cleaned.

[0064] Through the coordinated operation of the above components, the waste glass bottle recycling production line can efficiently and accurately clean the labels on the glass bottles, providing a good foundation for subsequent glass bottle recycling and regeneration. This effectively improves the problem that the above production line did not have a pre-treatment stage for the adhering substances on the bottle surface, which caused impurities to mix with glass fragments after breakage and were difficult to separate, affecting the quality of recycled glass melting.

[0065] Specifically, refer to Figure 1 and Figure 2 The conveyor table 1 is also equipped with:

[0066] The industrial camera 12 and the rotary robotic arm 11 are connected to a rotary controller. The rotary controller is configured to determine the position of the glass bottle label edge based on the image of the glass bottle outer wall captured by the industrial camera 12, and control the rotary robotic arm 11 to drive the glass bottle to rotate to the starting position.

[0067] An industrial camera 12 is mounted on the conveyor 1 at a position higher than the glass bottle, enabling it to clearly capture images of the bottle's outer wall. When the glass bottle is gripped by the rotary robotic arm 11, the industrial camera 12 activates, taking pictures of the bottle's outer wall to obtain complete image information including the label. The industrial camera 12 then transmits the captured image to an image processing system, which identifies and analyzes it to determine the edge position of the label. The rotary controller, based on the label edge position determined by the image processing system, controls the rotary robotic arm 11 to rotate the glass bottle to the aforementioned starting position. This design facilitates accurate internal and external heating and softening of the label from the edge using the hot air nozzle 111 and the first steam nozzle 31, and ensures that the scraper 33 can accurately insert into the gap between the label edge and the bottle body at the starting position, guaranteeing that the scraper 33 can effectively and completely remove the label as the glass bottle rotates under the drive of the rotary robotic arm 11.

[0068] Therefore, through the cooperation of the industrial camera 12 and the rotary controller, the waste glass bottle recycling production line can more accurately determine the position of the glass bottle label edge and control the rotary robotic arm 11 to rotate the glass bottle to the set starting position, thereby improving the accuracy and efficiency of label cleaning.

[0069] Furthermore, referring to Figure 1 and Figure 2 The conveyor table 1 is also equipped with:

[0070] The second steam nozzle 34 is disposed on the conveyor table 1 and its spray direction is directed towards the tip of the scraper 33. The second steam nozzle 34 is disposed on the side of the scraper 33 away from the first steam nozzle 31.

[0071] During the process of scraping off the label by the scraper 33, the second steam nozzle 34 simultaneously sprays high-temperature steam onto the glass bottle. Because the steam is directed towards the tip of the scraper 33, the high-temperature steam directly impacts the label fragments scraped off by the scraper 33 and heats the scraping part at the tip of the scraper 33, improving the cleaning effect of the scraper 33 on softened adhesive and labels. This makes the labels and adhesive easier to remove and effectively reduces the probability of adhesive residue after label removal.

[0072] Furthermore, referring to Figure 1 and Figure 2 A scraper seat 3 is installed on the conveyor table 1. The first steam nozzle 31 is hinged to the scraper seat 3. The scraper 33 and the second steam nozzle 34 are installed on the scraper seat 3. An angle adjustment component for adjusting the flip angle of the first steam nozzle 31 is provided on the scraper seat 3. The angle adjustment component and the pressure sensor 32 are connected to the angle adjustment controller.

[0073] The angle adjustment controller is configured to control the angle adjustment assembly to drive the first steam nozzle 31 to rotate so that its spray direction is opposite to the direction of rotation of the glass bottle when the pressure sensor 32 detects a value greater than zero; and to control the angle adjustment assembly to drive the first steam nozzle 31 to rotate so that its spray direction is directed toward the tip of the cutter on the side away from the second steam nozzle 34 when the pressure sensor 32 detects a value of zero.

[0074] By connecting the angle adjustment controller, pressure sensor 32 and angle adjustment assembly, when the pressure sensor 32 detects a value greater than zero, it indicates that the scraper 33 has begun to contact the label and generate scraping resistance, which means that the scraper 33 is ready to enter the label scraping operation state. At this time, the angle adjustment controller controls the angle adjustment assembly to drive the first steam nozzle 31 to rotate, so that its spray direction is opposite to the direction of rotation of the glass bottle, spraying high-heat steam into the glass bottle, further softening the label adhesive and using the steam impact force to produce a peeling effect on the label, assisting the scraper 33 in cleaning the label.

[0075] When the pressure sensor 32 detects a value of zero, it indicates that the scraper 33 is not in contact with the glass bottle and is in standby mode. At this time, the angle adjustment controller controls the angle adjustment component to drive the first steam nozzle 31 to rotate, so that its spray direction is directed towards the tip of the scraper 33 away from the second steam nozzle 34, and together with the second steam nozzle 34, the scraper 33 is sprayed and cleaned. The impact force and dissolving effect of the high-temperature steam removes the residue on the surface of the scraper 33, ensuring the cleanliness of the scraper 33. This is to avoid impurities on the scraper 33 not being cleaned in time and re-adhere to the glass bottle during subsequent label cleaning, affecting the cleaning effect, and to ensure that the scraper 33 maintains a good working condition every time the label is scraped off.

[0076] Specifically, refer to Figures 1 to 5 The angle adjustment component includes:

[0077] The elastic element 311, which can be a coil spring or a torsion spring, is located at the hinge point between the first steam nozzle 31 and the scraper holder 3. In this embodiment, it is set as a torsion spring. In the initial state, the elastic element 311 sprays steam from the first steam nozzle 31 towards the tip of the cutter away from the second steam nozzle 34, that is, in the state of cleaning the scraper 33.

[0078] An electromagnet 35 is mounted on a scraper base 3. A permanent magnet 312, which is correspondingly mounted on the electromagnet 35 and is magnetically repelled by the electromagnet 35 when it is energized, is fixed on the first steam nozzle 31. The electromagnet 35 is connected to an angle adjustment controller. The angle adjustment controller is configured to energize the electromagnet 35 when the pressure sensor 32 detects a value greater than zero.

[0079] When the glass bottle begins to rotate, the label cleaning operation is initiated, and the pressure sensor 32 detects the resistance of the scraper 33. When the pressure sensor 32 detects a value greater than zero, it indicates that the scraper 33 has begun to contact the label and generate scraping resistance. At this time, the angle adjustment controller receives the signal from the pressure sensor 32 and controls the electromagnet 35 on the label holder 3 to be energized. The electromagnet 35 generates a magnetic field, which generates a magnetic repulsion force with the permanent magnet 312 and drives the first steam nozzle 31 to rotate against the torsional deformation force of the elastic element 311. This causes the spray direction of the first steam nozzle 31 to be opposite to the direction of rotation of the glass bottle, i.e., in a state of softening the label and adhesive. The first steam nozzle 31 sprays high-heat steam into the glass bottle, further softening the label adhesive and using the steam impact force to peel off the label, assisting the scraper 33 in cleaning the label.

[0080] During the label cleaning process, the pressure sensor 32 continuously detects the resistance when the scraper 33 removes the label. As long as the pressure sensor 32 detects a value greater than zero, the angle controller keeps the electromagnet 35 energized, ensuring that the jet direction of the first steam nozzle 31 is continuously reversed and tangential to the direction of glass bottle rotation, thus ensuring that the steam continuously assists in label cleaning.

[0081] When the pressure sensor 32 detects a value of zero, it indicates that the scraper 33 has moved away from the glass bottle and there is no glass bottle on the labeling station. At this time, the angle controller controls the electromagnet 35 to be de-energized, and the torsional deformation force of the elastic element 311 drives the first steam nozzle 31 to flip and return to its initial state, that is, the spray direction is directed towards the tip of the scraper 33 on the side away from the second steam nozzle 34, and together with the second steam nozzle 34, sprays and washes the scraper 33 to remove the residue on the surface of the scraper 33.

[0082] Thus, through the ingenious design of the elastic element 311 and the electromagnet 35 in the angle adjustment component, the waste glass bottle recycling production line can accurately and automatically adjust the spray direction of the first steam nozzle 31 according to the actual working state of label cleaning. This not only provides effective steam assistance during label cleaning, but also thoroughly sprays and washes the scraper 33 after cleaning, improving the automation level and label cleaning quality of the production line and ensuring the stable operation of the production line.

[0083] Additionally, refer to Figure 1 and Figure 3 The recycling production line of this application also includes:

[0084] The biological enzymatic hydrolysis tank 4 contains a biological enzyme solution composed of a mixture of cellulase, protease, and lipase. When a glass bottle with residual labels and adhesive is placed into the biological enzymatic hydrolysis tank 4, the enzymes react chemically with the labels and adhesive. The enzymes can decompose the organic components in the labels and adhesive, converting them into water-soluble or easily removable substances. The biological enzymatic hydrolysis tank 4 is located on the side of the conveyor table 1 opposite to the scraper 33, and is used to enzymatically hydrolyze the residual labels and adhesive on the glass bottle after label removal.

[0085] Furthermore, referring to Figure 1 and Figure 3 The industrial camera 12 and the rotary robotic arm 11 are connected to a stroke controller. The stroke controller is configured to determine whether there are any labels and glue residues on the glass bottle after the scraper 33 completes the scraping operation, based on the image of the outer wall of the glass bottle captured by the industrial camera 12, and control the rotary robotic arm 11 to put the glass bottle with labels and glue residues after the scraping operation into the biological enzymatic hydrolysis tank 4.

[0086] Specifically, after the label cleaning controller determines that the label has been cleaned, the industrial camera 12 re-captures an image of the outer wall of the glass bottle and transmits it to the image processing system for analysis and judgment of the cleanliness level of the glass bottle. If it is determined that there are residual labels and glue on the glass bottle, the stroke controller controls the rotary robotic arm 11 to change the conveying path of the glass bottle, placing the glass bottle with residual labels and glue into the bio-enzymatic hydrolysis tank 4. If necessary, the rotary robotic arm 11 can also drive the glass bottle to rotate in the bio-enzymatic hydrolysis tank 4 to promote the enzymatic hydrolysis effect. If it is determined that there are no residual labels and glue on the glass bottle, the rotary robotic arm 11 is controlled to transport the glass bottle to the next processing stage. Through this collaborative working method, the production line can more accurately handle the problem of label and glue residue on waste glass bottles, improve the recycling and regeneration quality of waste glass bottles, and provide more favorable conditions for subsequent processing.

[0087] The image processing systems mentioned above for identifying the edge of the label on the glass bottle and for identifying the cleanliness of the glass bottle are both based on basic image processing and recognition technology. They are algorithm models formed by deep learning after grayscale and noise reduction processing. These are common technical means in this field and will not be elaborated on here.

[0088] Meanwhile, conveyor 1 is also equipped with:

[0089] Collection Box 5, see reference Figures 1 to 5 Located below the label holder 3 on the conveyor 1, it is used to collect the waste generated during the label removal process. The collection box 5 is equipped with a filter screen 51 at an angle to separate the solid and liquid waste.

[0090] The design of the collection bin 5 ensures that waste generated during label cleaning falls accurately into it, preventing it from scattering around the conveyor table 1 and maintaining the cleanliness of the production line. A filter screen 51 is installed at an angle within the collection bin 5, with one end of the screen higher than the other. When waste enters the collection bin 5, due to the angle of the filter screen 51, liquid flows downwards along it under gravity, entering the collection bin 5 from the lower end of the screen. Solid waste, however, is intercepted by the filter screen 51 and remains above it. This method achieves solid-liquid separation of the waste, facilitating subsequent separate processing of solid and liquid waste.

[0091] Additionally, refer to Figures 1 to 5The collection box 5 has a lifting shield 6 installed on its inner circumference to prevent splashes or vapors generated during label removal from escaping. This shield is made of a transparent material with a certain degree of flexibility and corrosion resistance, such as PE or PP sheet. A funnel-shaped guide plate 61 is fixed to the lower end of the shield 6. The upper opening of the funnel-shaped guide plate 61 is larger and connected to the lower end of the shield 6, while the lower opening is smaller and aligned with the filter screen 51 inside the collection box 5. When waste falls into the shield 6, it slides down the slope of the funnel-shaped guide plate 61 and eventually collects on the filter screen 51. The collection box 5 is equipped with a lifting component 52 for raising and lowering the shield 6. The lifting component 52 can be a cylinder, electric push rod, etc. The lifting component 52 is connected to a rotary controller. When the rotary controller determines that the label cleaning operation has started, it controls the lifting component 52 to raise the shield 6; when the rotary controller determines that the label cleaning operation has been completed, it controls the lifting component 52 to lower the shield 6 back to its initial position.

[0092] Before the label cleaning operation begins, the lifting component 52 is in its initial state, and the shielding cover 6 is located at a lower position inside the collection box 5, which does not hinder the insertion of glass bottles and the preliminary preparation for the label cleaning operation.

[0093] When the rotary controller determines that the label cleaning operation has started, it simultaneously controls the lifting component 52 to raise the shield 6. Once raised, the shield 6 covers most of the upper opening of the collection box 5, forming a relatively enclosed space. This effectively prevents splashes generated during label removal from escaping from the collection box 5, while also preventing vapor from escaping into the surrounding environment, reducing pollution to the production environment and potential hazards to operators.

[0094] After the label cleaning operation is completed, the rotary controller re-operates the lifting component 52, causing the shielding cover 6 to return to its initial position, preparing for the next operation. This collaborative working method enables the production line not only to efficiently clean labels from waste glass bottles, but also to effectively collect, separate, and protect the waste generated during the cleaning process, improving the production line's processing efficiency while reducing environmental pollution and hazard to operators.

[0095] This application discloses a processing method for a waste glass bottle recycling production line, based on the above-described waste glass bottle recycling production line, with reference to... Figures 1 to 5 A method for processing waste glass bottles in a recycling production line includes the following steps:

[0096] S1. The waste glass bottles are initially classified according to color and shape, and non-glass impurities such as metal caps and plastic labels and broken glass bottles are removed. The waste glass bottles with non-fully wrapped paper labels are then placed on the chain conveyor 2.

[0097] S2. The rotary robotic arm 11 clamps the glass bottle and sprays hot air nozzles 111 onto the inner wall of the label corresponding to the clamped glass bottle to soften the adhesive between the waste glass bottle and the label.

[0098] S3. The first steam nozzle 31 simultaneously sprays high-temperature steam onto the edge of the glass bottle label held on the rotary robotic arm 11, and the scraper 33 presses against the outer wall of the glass bottle. Then the rotary robotic arm 11 drives the glass bottle to rotate so that the scraper 33 scrapes off the label on the glass surface.

[0099] S4. During the label scraping process, the pressure sensor 32 detects the label scraping resistance of the scraper 33 in real time. When the pressure value detected by the pressure sensor 32 increases and remains within a certain range within the set label scraping time, it is determined that the label cleaning is completed. When the pressure value detected by the pressure sensor 32 increases and then drops sharply within the set label scraping time, it is determined that the label has not been partially or completely cleaned. The rotary robotic arm 11 drives the glass bottle to rotate in the reverse direction to the starting position and continues to control the glass bottle to rotate forward.

[0100] S5. After the label is scraped off, the rotary robotic arm 11 puts the glass bottle with residual label and glue into the bio-enzymatic hydrolysis tank 4 for dissolving the residual glue;

[0101] S6. Rotary robotic arm 11 grips the next glass bottle and repeats steps S2 to S5.

[0102] The implementation principle of a waste glass bottle recycling production line according to an embodiment of this application is as follows:

[0103] The screened waste glass bottles with non-fully-wrapped paper labels are placed on the chain conveyor 2. When the glass bottle reaches the set position, the rotary robotic arm 11 moves down and clamps the glass bottle; simultaneously, a hot air nozzle 111 extends into the glass bottle and sprays hot air onto the inner wall, softening the adhesive on the back of the label and reducing the adhesion between the label and the glass bottle, creating favorable conditions for subsequent label cleaning. At the same time, the rotary robotic arm 11 clamps the glass bottle so that the outer wall of the bottle is pressed against the scraper 33, and the first steam nozzle 31 sprays high-heat steam onto the label on the glass bottle clamped by the rotary robotic arm 11, further softening the label and adhesive. Then, the rotary robotic arm 11 drives the clamped glass bottle to rotate. During the rotation, the scraper 33 moves tangentially along the outer wall of the glass bottle to scrape off the label.

[0104] When the scraper 33 scrapes off the label on the glass bottle, as the label is gradually scraped off, the resistance between the scraper 33 and the glass bottle will first increase and be detected by the pressure sensor 32. Then, within the set scraping time, the pressure value detected by the pressure sensor 32 remains basically within a certain range. When the label is completely cleaned, the pressure value drops to close to the initial value, at which point the scraping controller determines that the label cleaning is complete.

[0105] When the pressure value detected by the pressure sensor 32 increases during the label scraping process and then suddenly drops within the set scraping time, it means that the scraper 33 has scratched the label and stuck it to the outside of the label at a certain moment. The label scraping controller determines that the label has not been cleaned in part or in whole. At this time, the label scraping controller controls the rotary robotic arm 11 to drive the glass bottle to rotate in the opposite direction to the edge position of the label on the opposite side of the glass bottle's rotation direction, so that the glass bottle returns to the initial stage of label cleaning. Then, the controller continues to control the glass bottle to rotate forward and restart the label cleaning process to ensure that the label can be completely cleaned.

[0106] Through the coordinated operation of the above components, the waste glass bottle recycling production line can efficiently and accurately clean the labels on the glass bottles, providing a good foundation for subsequent glass bottle recycling and regeneration. This effectively improves the problem that the above production line did not have a pre-treatment stage for the adhering substances on the bottle surface, which caused impurities to mix with glass fragments after breakage and were difficult to separate, affecting the quality of recycled glass melting.

[0107] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0108] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waste glass bottle recycling and regeneration production line, characterized in that, Includes a conveyor table and a chain conveyor, wherein the conveyor table is equipped with: A rotary robotic arm is used to grip glass bottles on the chain conveyor and drive the glass bottles to rotate. A hot air nozzle is installed on the fixed part of the rotary robotic arm and is used to extend into the glass bottle held on the rotary robotic arm and spray hot air onto the inner wall of the glass bottle. The first steam nozzle is located on the conveyor platform and is positioned opposite to the hot air nozzle to spray high-temperature steam onto the outer wall of the glass bottle held on the rotary robotic arm. The spraying direction is opposite to the direction of rotation of the glass bottle. A scraper is placed on the conveyor table and pressed against the outer wall of the glass bottle held on the rotary robotic arm. The scraper is located on the side of the first steam nozzle opposite to the direction of rotation of the glass bottle and is tangential to the direction of rotation of the glass bottle. A pressure sensor is located between the scraper and the conveyor table and is used to detect the resistance when the scraper removes the label; The label scraping controller, connected to the pressure sensor and the rotary robotic arm, is configured to determine that the label cleaning is complete when the pressure value detected by the pressure sensor increases and remains within a certain range within a set label scraping time; and to determine that the label is not completely or partially cleaned when the pressure value detected by the pressure sensor increases and then drops sharply within a set label scraping time, thereby controlling the rotary robotic arm to drive the glass bottle to rotate in the opposite direction to the starting position and continuing to control the glass bottle to rotate in the forward direction. The scratching time is the time it takes for the scraper to completely cover the entire label surface as the glass bottle rotates, and the starting position is the position of the steam nozzle corresponding to the edge of the label on the opposite side of the glass bottle's rotation direction.

2. The waste glass bottle recycling production line according to claim 1, characterized in that, Also includes: An industrial camera, together with the rotary robotic arm, is connected to a rotary controller. The rotary controller is configured to determine the edge position of the glass bottle label based on the image of the glass bottle's outer wall captured by the industrial camera, and control the rotary robotic arm to drive the glass bottle to rotate to the starting position.

3. The waste glass bottle recycling production line according to claim 2, characterized in that, Also includes: A second steam nozzle is disposed on the conveyor platform and its spray direction is directed towards the tip of the scraper. The second steam nozzle is disposed on the side of the scraper away from the first steam nozzle.

4. The waste glass bottle recycling production line according to claim 3, characterized in that, A scraper holder is installed on the conveyor table. The first steam nozzle is hinged to the scraper holder. The scraper and the second steam nozzle are installed on the scraper holder. An angle adjustment component for adjusting the flip angle of the first steam nozzle is provided on the scraper holder. The angle adjustment component and the pressure sensor are connected to an angle adjustment controller. The angle adjustment controller is configured to control the angle adjustment assembly to drive the first steam nozzle to rotate so that its spray direction is opposite to the direction of rotation of the glass bottle when the pressure sensor detects a value greater than zero. And when the pressure sensor detects a value of zero, the control angle adjustment component drives the first steam nozzle to rotate so that its spray direction is directed toward the tip of the scraper on the side away from the second steam nozzle.

5. The waste glass bottle recycling production line according to claim 4, characterized in that, The angle adjustment component includes: An elastic element is provided at the hinge point between the first steam nozzle and the scraper seat. In the initial state, the spray direction of the first steam nozzle is directed towards the tip of the scraper on the side away from the second steam nozzle. An electromagnet is mounted on a scraper holder. A permanent magnet corresponding to the electromagnet and magnetically repelling the electromagnet is fixed to the first steam nozzle. The electromagnet is connected to the angle adjustment controller. The angle adjustment controller is configured to control the electromagnet to be energized when the pressure sensor detects a value greater than zero.

6. A waste glass bottle recycling production line according to any one of claims 2-5, characterized in that, Also includes: A biological enzymatic hydrolysis tank is located on the side of the conveyor platform away from the scraper, and is used to enzymatically hydrolyze the labels and glue remaining on the glass bottles after the labels have been scraped off.

7. A waste glass bottle recycling production line according to claim 6, characterized in that, The industrial camera and the rotary robotic arm are connected to a stroke controller. The stroke controller is configured to determine whether there are residual labels and glue on the glass bottle based on the image of the outer wall of the glass bottle captured by the industrial camera, and control the rotary robotic arm to put the glass bottle with residual labels and glue into the bio-enzymatic hydrolysis tank.

8. The waste glass bottle recycling production line according to claim 4, characterized in that, Also includes: A collection box, located below the label removal seat on the conveyor platform, is used to collect waste generated during the label removal process. The collection box is equipped with a filter screen at an angle to separate the solid and liquid components of the waste.

9. A waste glass bottle recycling production line according to claim 8, characterized in that, The inner circumferential wall of the collection box is equipped with a shield to prevent splashes or vapors generated during label removal from escaping. A funnel-shaped guide plate is fixed to the lower end of the shield, with the cone apex of the guide plate facing downwards. The collection box is equipped with a lifting component to drive the shield to rise and fall, and the lifting component is connected to the rotary controller. When the rotary controller determines that the label cleaning operation has started, it controls the lifting mechanism to raise the shielding cover. When the rotary controller determines that the label cleaning operation has been completed, it controls the lifting mechanism to lower the shielding cover back to its initial position.

10. A method for processing waste glass bottles in a recycling production line, based on a waste glass bottle recycling production line as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. The waste glass bottles are initially classified according to color and shape, and non-glass impurities such as metal caps and plastic labels and broken glass bottles are removed. The screened waste glass bottles with non-fully wrapped paper labels are placed on the chain conveyor. S2. The rotary robotic arm clamps the glass bottle and the hot air nozzle sprays hot air onto the inner wall of the label corresponding to the clamped glass bottle to soften the adhesive between the waste glass bottle and the label. S3. The first steam nozzle simultaneously sprays high-temperature steam onto the edge of the glass bottle label held on the rotary robotic arm, and the scraper is pressed against the outer wall of the glass bottle. Then the rotary robotic arm drives the glass bottle to rotate so that the scraper can scrape off the label on the glass surface. S4. During the label scraping process, the pressure sensor detects the label scraping resistance of the scraper in real time. When the pressure value detected by the pressure sensor increases and remains within a certain range within the set scraping time, it is determined that the label cleaning is completed. When the pressure value detected by the pressure sensor increases and then drops sharply within the set scraping time, it is determined that the label has not been partially or completely cleaned. The rotary robotic arm drives the glass bottle to rotate in the opposite direction to the starting position and continues to control the glass bottle to rotate forward. S5. After the label is scraped off, the rotary robotic arm places the glass bottle with residual label and glue into a bio-enzymatic hydrolysis tank for dissolving the residual glue; S6. The rotary robotic arm grips the next glass bottle and repeats steps S2 to S5.

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