Regenerative zipper wire production process

Abstract

The invention relates to the field of zippers, and discloses a regenerated zipper wire production process which comprises the following steps: sequentially conveying a recycled zipper material to a coarse shearing machine for coarse shearing, a fine shearing machine for fine shearing, an extruder for melt extrusion molding, a brace granulator for brace granulation and a vibrating screen for vibrating screening, the screened regenerated slices are conveyed to a granulation material containing box to be stored; the stored regenerated slices are conveyed to a crystallizing machine to be crystallized, the crystallized regenerated slices are conveyed to a tackifying device to be tackified, the tackified regenerated slices are conveyed to a cooling stock bin to be cooled, and meanwhile heat energy is recycled and reused through a heat energy recycling and reusing device arranged between the cooling stock bin and the crystallizing machine; and conveying the cooled regenerated slices to a mixer for mixing, and conveying the mixed material to a regenerated monofilament production line for production. The method has the advantages that heat efficiency loss can be effectively reduced, manufacturing cost can be reduced, and the quality of regenerated monofilament products can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of zipper technology, specifically to a process for producing recycled zipper yarn. Background Technology

[0002] Recycled zipper yarn specifically refers to zipper yarn made from recycled zipper materials (such as zipper filaments, waste monofilaments, waste zipper teeth, recycled nylon, recycled polyester, etc.). Figure 1 As shown, the existing production process for recycled zipper yarn includes the following steps: coarse shearing of the recycled zipper material using a coarse shearing machine, fine shearing using a fine shearing machine, extrusion molding using an extruder, slitting into pellets using a zipper pelletizer, vibrating screening using a vibrating screen, slicing and storing the zipper material in a pelletizing bin, crystallization using a crystallizer, thickening using a thickening device, mixing using a mixing machine, and dehumidification and drying using a dehumidifying dryer, before finally feeding it into a recycled monofilament production line for processing. However, the above-mentioned existing recycled zipper yarn production process has the following defects in actual production:

[0003] 1. Significant heat efficiency loss, specifically including:

[0004] 1.1 Crystallization process: The crystallizer needs to heat the regenerated chips from room temperature to a specific temperature (usually 180-220°C) and maintain it for a certain period of time (working time reaches 11-12 hours / batch); heating and long-term heat preservation consume a lot of electricity or natural gas, making it a major energy consumer in the production process;

[0005] 1.2 Thickening process: The thickening device needs to heat the recycled chips from room temperature to a specific temperature and maintain it in a high-temperature environment of 200-220°C for a long time (working time is up to 70-75 hours / batch), which is a "power hog" or "gas hog" in the production process. At the same time, the thickening device needs to cool the material to a specified temperature (usually 60-70°C) when discharging the material.

[0006] 1.3 The working times of the crystallization process and the thickening process cannot be matched, and the upper and lower processes cannot be continuous. This requires multiple heating and cooling of materials during the production process, resulting in a large loss of thermal efficiency and high manufacturing costs.

[0007] 2. Prolonged stirring of recycled zipper chips in the thickening device will generate excessive dust due to friction, which will seriously affect the quality of recycled zipper filaments and may lead to a decrease in tensile strength and abrasion resistance, making the zipper filaments prone to breakage.

[0008] 3. The granulation container has a small capacity and cannot distinguish between recycled chips made of different materials. All chips are processed using the same process, resulting in higher manufacturing costs. For example, recycled chips made from materials such as "zipper packs and waste monofilaments" have higher viscosity characteristics than those made from materials such as "waste chain teeth and waste zippers". Furthermore, materials such as "zipper packs and waste monofilaments" do not undergo a high-temperature dyeing process, and the molecular chains are less damaged, resulting in higher quality recycled chips.

[0009] 4. The crystallizer can only remove the surface moisture of the regenerated slices with ordinary hot air, but the internal moisture cannot be effectively removed, which is called "surface drying". The regenerated slices are still prone to hydrolysis during subsequent processing.

[0010] 5. Before production, the recycled wafers are transported using a gas transport system, which makes them prone to secondary moisture absorption.

[0011] 6. The mixing machine cannot be set to the proportion of various materials as needed. Summary of the Invention

[0012] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a process for producing recycled zipper yarn.

[0013] To achieve the above objectives, the present invention provides the following technical solution:

[0014] A process for producing recycled zipper yarn, the process comprising:

[0015] The recycled zipper material is sequentially fed to a coarse shearing machine for coarse shearing, a fine shearing machine for fine shearing, an extruder for melt extrusion molding, a zipper pelletizer for zipper pelletizing, and a vibrating screen for vibrating screening. The screened recycled chips are then transported to a pelletizing container for storage.

[0016] The stored recycled chips are transported to a crystallizer for crystallization. The crystallized recycled chips are then transported to a thickening device for thickening. The thickened recycled chips are then transported to a cooling silo for cooling. At the same time, a heat recovery and reuse device set between the cooling silo and the crystallizer is used to recover and reuse heat energy. The cooled recycled chips are then transported to a mixing machine for mixing. The mixed material is then transported to a recycled monofilament production line for production.

[0017] Furthermore, the heat energy recovery and reuse device installed between the cooling silo and the crystallizer specifically includes:

[0018] The hot air from the top of the cooling silo is drawn into the first heat exchanger by a cooling fan, while the outside air is drawn into the first heat exchanger by a crystallizer fan. The hot air and the outside air exchange heat for the first time in the first heat exchanger. The air after the first heat exchange is then transported to the cooler by the cooling fan for cooling, and the cooled air is then transported to the bottom of the cooling silo to cool the regenerated chips.

[0019] The outside air after the first heat exchange is sent to the second heat exchanger, and the hot air at the top of the crystallizer is also sent to the second heat exchanger, so that the outside air and the hot air can exchange heat energy for the second time in the second heat exchanger. The outside air after the second heat exchange is fed into the crystallizer heating box and heated to the required process temperature before being output to the crystallizer. The hot air containing moisture after the second heat exchange is discharged.

[0020] Furthermore, before the hot air from the top of the cooling silo is drawn into the first heat exchanger, the process also includes: first inputting the hot air from the top of the cooling silo into the first cyclone dust collector for cyclone dust removal, and then sending the hot air to the first dust filter for dust removal and filtration.

[0021] Before delivering the hot air from the top of the crystallizer to the second heat exchanger, the process also includes: inputting the hot air from the top of the crystallizer to a second dust filter for dust removal and filtration.

[0022] Furthermore, before conveying the crystallized regenerated slices to the thickening device for thickening, the process also includes conveying the crystallized regenerated slices to the first dehumidifying dryer for dehumidification and drying.

[0023] Furthermore, after the crystallized regenerated chips are conveyed to the first dehumidifying dryer for dehumidification and drying, the process also includes: conveying the dehumidified and dried regenerated chips to a transfer and insulation silo for insulation, and then conveying the insulation-insulated regenerated chips to a viscosity-enhancing device for viscosity enhancement.

[0024] Furthermore, the step of conveying the viscous recycled chips to the cooling silo for cooling specifically involves using a positive pressure conveyor to rapidly convey the viscous recycled chips to the cooling silo for cooling.

[0025] The process of conveying the heat-insulated recycled chips to the adhesion-enhancing device specifically involves using a positive pressure conveyor to rapidly convey the heat-insulated recycled chips to the adhesion-enhancing device for adhesion enhancement.

[0026] Furthermore, after the screened recycled chips are transported to the granulation container for storage, the process also includes: transporting recycled chips with different viscosity characteristics to different granulation silos for storage according to different zipper materials; separating the recycled chips in different granulation silos and transporting them to the crystallizer for crystallization; and controlling the thickening device to thicken the recycled chips with different process times according to the different viscosity characteristics of the recycled chips.

[0027] Furthermore, after the viscous recycled chips are transported to a cooling silo for cooling, the process also includes: transporting the cooled recycled chips to a dust removal device for dust removal, and, according to the different viscosity characteristics of the recycled chips, transporting the dust-removed recycled chips to the corresponding viscous silo for storage.

[0028] Furthermore, the step of conveying the cooled regenerated chips to the mixer for mixing specifically includes:

[0029] The recycled chips stored in the viscosity-enhancing silo are conveyed to the second dehumidifying dryer for dehumidification and drying. The high-viscosity material in the high-viscosity silo is conveyed to the third dehumidifying dryer for dehumidification and drying. The color masterbatch material in the color masterbatch silo is conveyed to the integrated crystallization and drying machine for crystallization and drying. According to production needs, the dehumidified and dried recycled chips, the dehumidified and dried high-viscosity material, or the crystallized and dried color masterbatch material are conveyed to the mixer for mixing.

[0030] Furthermore, the mixer is a weighing mixer, and according to the required proportions of various materials, the weighing mixer is used to weigh various materials before mixing them.

[0031] By adopting the above-described technical solution of the present invention, at least the following beneficial effects are achieved:

[0032] 1. By conveying the thickened regenerated chips to a cooling silo for cooling, and utilizing a heat recovery and reuse device located between the cooling silo and the crystallizer, the heat energy generated by the crystallizer and thickening device in heating the regenerated chips can be recovered and reused. This effectively reduces heat loss and thus lowers manufacturing costs. Simultaneously, the heat recovery and reuse device can also remove dust from the circulating air to ensure its cleanliness, thereby preventing the circulating air from affecting the thickening properties of the regenerated chips.

[0033] 2. By first conveying the crystallized regenerated chips to the first dehumidifying dryer, the first dehumidifying dryer can blow high-temperature, low-dew-point dry air into the drying hopper and make full contact and heat exchange with the surface-dried regenerated chips. The hot air can "carry out" the moisture inside the regenerated chips, ensuring that the regenerated chips will not be hydrolyzed during subsequent processing.

[0034] 3. By first conveying the dehumidified and dried recycled chips to the transfer and insulation silo for insulation, and then conveying the insulation recycled chips to the thickening device for thickening, the repeated heating of the recycled chips can be reduced. The thickening device can start heating from the second stage temperature (135℃) and eliminate the first stage temperature of 115℃ and the 90-minute running time, thereby reducing operating costs and reducing the generation of rotating dust.

[0035] 4. By introducing several granulation hoppers between the granulation container and the crystallizer, recycled chips with different viscosity characteristics can be placed separately in each hopper during actual use. Recycled chips with different viscosity characteristics can be transported to different hoppers according to different zipper materials for storage. This allows the viscosity-enhancing device to use different process times, thereby significantly reducing energy consumption costs and improving production efficiency. Simultaneously, the introduced granulation hoppers can also isolate the recycled chips from the air, preventing moisture absorption on the surface of the recycled chips. This helps reduce the operating time of the crystallizer and the first dehumidification dryer, further achieving energy-saving effects.

[0036] 5. By first conveying the cooled recycled chips to a dust removal device for dust removal, and then conveying the dust-removed recycled chips to the corresponding tackifying silo for storage, the dust removal device can filter the dust generated by the tackifying device, thereby solving the problem of excessive dust generated by friction due to long-term stirring of recycled chips in the tackifying device. This is beneficial to improving the tensile strength and wear resistance of recycled monofilaments, making the recycled monofilaments less prone to breakage.

[0037] 6. By using a second dehumidifying dryer to dehumidify and dry the recycled chips, a third dehumidifying dryer to dehumidify and dry the high-viscosity materials, and an integrated crystallization and drying machine to crystallize and dry the masterbatch materials, the dryness of recycled chips and other materials can be guaranteed, thus ensuring the quality of the recycled monofilament products produced.

[0038] 7. By adopting a weighing mixer, various required materials can be flexibly mixed according to different inventory and different proportions during the actual operation. Attached Figure Description

[0039] Figure 1 A flowchart illustrating the steps involved in the production process of existing recycled zipper yarn;

[0040] Figure 2 This is a flowchart illustrating the steps of the recycled zipper yarn production process of the present invention.

[0041] Figure 3 This is an overall structural diagram of the production system involved in the recycled zipper yarn production process of the present invention.

[0042] Figure 4This is a structural diagram of the gas delivery system in the production system of the present invention;

[0043] Figure 5 This is a structural diagram of the positive pressure conveyor in the production system of the present invention, which is connected to two rotary valves respectively through a switching valve;

[0044] Figure 6 This is a structural diagram of the heat energy recovery and reuse device in this invention.

[0045] Figure label:

[0046] Coarse shearing machine 1;

[0047] Fine shearing machine 2;

[0048] Extruder 3;

[0049] 4. Pelletizer

[0050] Vibrating screen 5;

[0051] Granulation container 6;

[0052] Crystallizer 7;

[0053] Thickening device 8;

[0054] Cooling silo 9;

[0055] Heat recovery and reuse device 10, cooling fan 101, first heat exchanger 102, crystallizer fan 103, cooler 104, second heat exchanger 105, crystallizer heating box 106, first cyclone dust collector 107, first dust filter 108, second dust filter 109, first pneumatic valve 10a, second pneumatic valve 10b;

[0056] Mixer 11;

[0057] First dehumidifying dryer 12;

[0058] 13 insulated transfer silos;

[0059] Positive pressure conveyor 14, switching valve 141;

[0060] Rotary valve 15;

[0061] Granulation silo 16;

[0062] Dust removal device 17;

[0063] Thickening material bin 18;

[0064] Second dehumidifying dryer 19;

[0065] High viscosity silo 20;

[0066] Third dehumidifying dryer 21;

[0067] Masterbatch silo 22;

[0068] 23 Crystallization and Drying Integrated Machine;

[0069] First negative pressure suction material machine 24;

[0070] Second cyclone dust collector 25;

[0071] Third dust filter 26;

[0072] First vacuum valve assembly 27;

[0073] Second negative pressure suction feeder 28;

[0074] Third cyclone dust collector 29;

[0075] Fourth dust filter 30;

[0076] Second vacuum valve assembly 31;

[0077] Third negative pressure suction feeder 32;

[0078] Central control cabinet 33. Detailed Implementation

[0079] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0080] Please see the appendix Figures 2 to 6 As shown, the present invention provides a process for producing recycled zipper yarn, the process comprising:

[0081] The recycled zipper material (such as PET nylon zipper material) is sequentially fed to the coarse shearing machine 1 for coarse shearing, the fine shearing machine 2 for fine shearing, the extruder 3 for melt extrusion molding, the strip pelletizer 4 for strip pelletizing, and the vibrating screen 5 for vibrating screening. The screened recycled chips (such as recycled PET chips) are then fed to the pelletizing container 6 for storage.

[0082] The stored recycled chips are transported to the crystallizer 7 for crystallization. The crystallized recycled chips are then transported to the thickening device 8 for thickening. The thickened recycled chips are then transported to the cooling silo 9 for cooling. At the same time, the heat energy is recovered and reused by the heat energy recovery and reuse device 10 set between the cooling silo 9 and the crystallizer 7. The cooled recycled chips are then transported to the mixer 11 for mixing. The mixed material is then transported to the recycled monofilament production line for production.

[0083] This invention cools the regenerated chips after thickening by transporting them to a cooling silo 9 and then uses a heat recovery and reuse device 10 located between the cooling silo 9 and the crystallizer 7 to recover and reuse the heat generated by the crystallizer 7 and the thickening device 8 in heating the regenerated chips. This effectively reduces heat efficiency loss and thus reduces manufacturing costs.

[0084] In some embodiments of the present invention, in order to better achieve heat energy recovery, the heat energy recovery and reuse device 10 disposed between the cooling silo 9 and the crystallizer 7 specifically includes:

[0085] The cooling fan 101 draws hot air from the top of the cooling silo 9 into the first heat exchanger 102, while the crystallizer fan 103 draws outside air into the first heat exchanger 102. This allows the hot air and outside air to exchange heat for the first time in the first heat exchanger 102. After the heat exchange, the temperature of the hot air decreases, and the temperature of the outside air increases. The air after the first heat exchange is then transported by the cooling fan 101 to the cooler 104 for further cooling. The cooled air is then transported to the bottom of the cooling silo 9 to cool the regenerated slices, thus achieving internal air circulation.

[0086] The outside air after the first heat exchange is sent to the second heat exchanger 105, and the hot air at the top of the crystallizer 7 is also sent to the second heat exchanger 105, so that the outside air and the hot air can undergo a second heat exchange in the second heat exchanger 105. After the heat exchange, the outside air will be heated again, while the hot air discharged from the top of the crystallizer 7 will be cooled down. The outside air after the second heat exchange is fed into the crystallizer heating box 106 and heated to the required process temperature before being output to the crystallizer 7 for use. The hot air containing moisture after the second heat exchange is discharged.

[0087] In some embodiments of the present invention, in order to ensure the quality of the circulating air and avoid the circulating air affecting the thickening properties of the regenerated chips, before the hot air at the top of the cooling hopper 9 is drawn into the first heat exchanger 102, the method further includes: first inputting the hot air at the top of the cooling hopper 9 into the first cyclone dust collector 107 for cyclone dust removal, and then sending the hot air to the first dust filter 108 for dust removal and filtration, so as to effectively remove dust in the hot air and ensure the cleanliness of the circulating air;

[0088] Before the hot air from the top of the crystallizer 7 is delivered to the second heat exchanger 105, the method further includes: inputting the hot air from the top of the crystallizer 7 into the second dust filter 109 for dust removal and filtration to remove dust from the hot air discharged from the top of the crystallizer 7.

[0089] In some embodiments of the present invention, before conveying the crystallized regenerated slices to the thickening device 8 for thickening, the method further includes: conveying the crystallized regenerated slices to the first dehumidifying dryer 12 for dehumidification and drying.

[0090] Because the crystallizer 7 can only remove surface moisture from the regenerated slices using ordinary hot air, while the internal moisture cannot be effectively removed (i.e., "surface drying"), the regenerated slices are still prone to hydrolysis during subsequent processing. The core function of the first dehumidifying dryer 12 of this invention can be summarized as follows: by providing continuous, stable, low-dew-point drying hot air, it thoroughly removes moisture from the regenerated slices, achieving the extremely low moisture content required for subsequent processing. It also features deep dehumidification, with built-in molecular sieves or honeycomb rotors as adsorbents, enabling deep dehumidification of the intake ambient air, lowering its dew point to -40°C or even lower, making the air virtually moisture-free. Therefore, by first conveying the crystallized regenerated slices to the first dehumidifying dryer 12, the invention utilizes the first dehumidifying dryer 12 to blow high-temperature, low-dew-point dry air into the drying hopper, allowing for sufficient contact and heat exchange with the surface-dried regenerated slices. This hot air effectively "carries out" the internal moisture of the regenerated slices, ensuring that hydrolysis does not occur during subsequent processing.

[0091] In some embodiments of the present invention, after the crystallized regenerated slices are conveyed to the first dehumidifying dryer 12 for dehumidification and drying, the method further includes: conveying the dehumidified and dried regenerated slices to the transfer heat preservation silo 13 for heat preservation, and then conveying the heat-preserved regenerated slices to the thickening device 8 for thickening.

[0092] Because the temperature of the recycled chips is relatively high (approximately 80-120°C) after the first dehumidifying dryer 12 dehumidifies and dries them; at the same time, the thickening device 8 mainly uses high temperature to increase the viscosity of the recycled chips, which requires reheating the recycled chips to the required temperature (approximately 245°C); therefore, this invention reduces the need for repeated heating of the recycled chips by first conveying the dehumidified and dried recycled chips to the transfer and heat preservation silo 13 for heat preservation, and then conveying the heat preservation recycled chips to the thickening device 8 for thickening. The thickening device 8 can start heating from the second stage temperature (135°C) and eliminate the first stage temperature of 115°C and the 90-minute running time, thereby reducing operating costs and reducing the generation of rotating dust.

[0093] In some embodiments of the present invention, the step of conveying the viscous recycled chips to the cooling silo 9 for cooling specifically involves using a positive pressure conveyor 14 to quickly convey the viscous recycled chips to the cooling silo 9 for cooling.

[0094] The process of conveying the heat-insulated recycled chips to the adhesion-enhancing device 8 for adhesion enhancement specifically involves using a positive pressure conveyor 9 to rapidly convey the heat-insulated recycled chips to the adhesion-enhancing device 8 for adhesion enhancement.

[0095] In a specific implementation of this invention, rotary valves 15 are provided at the output ends of both the cooling silo 9 and the viscosity-enhancing device 8. A positive pressure conveyor 14 is connected to each of the two rotary valves 15 via a switching valve 141, allowing switching between the two channels. Alternatively, each rotary valve 15 can be equipped with a positive pressure conveyor 14. The function of the rotary valves 15 is to improve gas delivery efficiency and reduce the impact of gas delivery on the viscosity characteristics of the regenerated chips.

[0096] In some embodiments of the present invention, after the screened recycled chips are transported to the granulation container 6 for storage, the method further includes: transporting recycled chips with different viscosity characteristics to different granulation silos 16 for storage according to different zipper materials, that is, multiple granulation silos 16 are provided after the granulation container 6; the recycled chips in different granulation silos 16 are separately transported to the crystallizer 7 for crystallization, and the thickening device 8 is controlled to thicken the recycled chips by using different process times according to the different viscosity characteristics of the recycled chips.

[0097] This invention introduces several granulation hoppers 16 between the granulation container 6 and the crystallizer 7. During operation, each hopper 16 can be used to distinguish and store recycled chips with different viscosity characteristics. Recycled chips with different viscosity characteristics can be transported to different hoppers 16 for storage based on different zipper materials. This allows the viscosity-enhancing device 8 to operate at different times. For example, recycled chips produced from materials such as "zipper packing and waste monofilament" have higher viscosity characteristics than those produced from materials such as "waste chain teeth and waste zippers." The operating time of the viscosity-enhancing device 8 can be reduced by approximately 12 hours, thus significantly reducing energy costs and improving production efficiency. Simultaneously, the introduced granulation hoppers 16 can isolate the recycled chips from the air, preventing surface moisture absorption. This helps reduce the operating time of the crystallizer 7 and the first dehumidifying dryer 12, further achieving energy-saving effects. After actual operation, it was found that the solution of this invention can reduce energy costs by approximately 15-30%.

[0098] In some embodiments of the present invention, after the viscous recycled chips are transported to the cooling silo 9 for cooling, the method further includes: transporting the cooled recycled chips to the dust removal device 17 for dust removal, and transporting the dust-removed recycled chips to the corresponding viscous silo 18 for storage according to the different viscosity characteristics of the recycled chips, that is, multiple viscous silos 18 are provided after the dust removal device 17.

[0099] This invention first transports the cooled recycled chips to a dust removal device 17 for dust removal, and then transports the dust-removed recycled chips to the corresponding thickening silo 18 for storage. The dust removal device 17 can filter the dust generated by the thickening device 8, thereby solving the problem of excessive dust generated by friction due to long-term stirring of the recycled chips in the thickening device 8. This is beneficial to improving the tensile strength and wear resistance of the recycled monofilaments, making the recycled monofilaments less prone to breakage.

[0100] In some embodiments of the present invention, the step of conveying the cooled regenerated slices to the mixer 11 for mixing specifically includes:

[0101] The recycled chips stored in the viscosity-enhancing silo 18 are conveyed to the second dehumidifying dryer 19 for dehumidification and drying. The high-viscosity material in the high-viscosity silo 20 is conveyed to the third dehumidifying dryer 21 for dehumidification and drying. The color masterbatch material in the color masterbatch silo 22 is conveyed to the integrated crystallization and drying machine 23 for crystallization and drying. According to production needs, the dehumidified and dried recycled chips, the dehumidified and dried high-viscosity material, or the crystallized and dried color masterbatch material are conveyed to the mixer 11 for mixing.

[0102] Because recycled chips are transported using a gas transport system before production, they are prone to secondary moisture absorption. This invention addresses this by using a second dehumidifying dryer 19 to dehumidify and dry the recycled chips, a third dehumidifying dryer 21 to dehumidify and dry high-viscosity materials, and a crystallization-drying integrated machine 23 to crystallize and dry the masterbatch material. This ensures the dryness of the recycled chips and other materials, thereby guaranteeing the quality of the produced recycled monofilament products.

[0103] In some embodiments of the present invention, the mixer 11 is a weighing mixer, and various materials are weighed and mixed according to the required proportions. By employing a weighing mixer, the present invention enables flexible mixing of various required materials based on different inventory levels and proportions during operation.

[0104] The entire production system involved in the production process of this invention will be further described below:

[0105] The entire production system of the present invention includes, in sequence along the production line direction, a coarse shearing machine 1, a fine shearing machine 2, an extruder 3, a strip pelletizer 4, a vibrating screen 5, a pelletizing hopper 6, several pelletizing silos 16, a crystallizer 7, a first dehumidifying dryer 12, a transfer and heat-insulating silo 13, a thickening device 8, a cooling silo 9, a dust removal device 17, several thickening silos 18, a second dehumidifying dryer 19, a third dehumidifying dryer 21, a crystallizing and drying integrated machine 23, and a mixer 11. The input end of each granulation hopper 16 is connected to the output end of the granulation container 6, so as to transport recycled chips with different viscosity characteristics to different granulation hoppers 16 according to different zipper materials. The output end of each granulation hopper 16 is connected to the crystallizer 7. The transfer and heat preservation hopper 13 and the thickening device 8 are both connected to the positive pressure conveyor 14 through the rotary valve 15. The input end of each thickening hopper 18 is connected to the output end of the dust removal device 17, so as to realize the transfer of recycled chips after dust removal according to different viscosity characteristics. Viscosity characteristics are stored in different viscosity-enhancing bins 18, and the output end of each viscosity-enhancing bin 18 is connected to the second dehumidifying dryer 19; the third dehumidifying dryer 21 is connected to a high viscosity bin 20, so that the high viscosity material is first transported to the third dehumidifying dryer 21 for dehumidification and drying, and then transported to the mixer 11 for mixing; the integrated crystallization and drying machine 23 is connected to a color masterbatch bin 22, so that the color masterbatch is first transported to the integrated crystallization and drying machine 23 for crystallization and drying, and then transported to the mixer 11 for mixing.

[0106] A heat recovery and reuse device 10 is located between the cooling silo 9 and the crystallizer 7. The heat recovery and reuse device 10 includes a cooling fan 101, a first heat exchanger 102, a crystallizer fan 103, a cooler 104, a second heat exchanger 105, a crystallizer heating box 106, a first cyclone dust collector 107, a first dust filter 108, a second dust filter 109, a first pneumatic valve 10a, and a second pneumatic valve 10b. The top of the cooling silo 9 is connected to the first heat exchanger 102 sequentially via the first cyclone dust collector 107 and the first dust filter 108. The first heat exchanger 102 is connected sequentially via the first pneumatic valve 10a, the cooling fan 101, and the cooler 104. The bottom of the cooling silo 9 is connected to the crystallizer 7. The crystallizer fan 103 is connected to the bottom of the crystallizer 7 in sequence through the first heat exchanger 102, the second heat exchanger 105 and the crystallizer heating box 106. The top of the crystallizer 7 is connected to the second heat exchanger 105 in sequence through the second dust filter 109 and the second pneumatic valve 10b. The second pneumatic valve 10b is used to discharge hot air containing moisture when needed. The first pneumatic valve 10a is used to draw in external air to achieve internal circulation. In order to ensure the quality of the circulating air in the cooling system, the first pneumatic valve 10a needs to be closed after running for a period of time to avoid moisture, dust and other substances in the air affecting the viscosity-enhancing properties of the regenerated chips. In one specific embodiment of the present invention, the crystallizer fan 103 can be connected to the shell side of the first heat exchanger 102 and the shell side of the second heat exchanger 105, and the crystallizer heating box 106 can be connected to the shell side of the second heat exchanger 105. At the same time, the top of the crystallizer 7 can be connected to the tube side of the second heat exchanger 105 in sequence through the second dust filter 109 and the second pneumatic valve 10b, and the first dust filter 108 can be connected to the cooling fan 101 through the tube side of the first heat exchanger 102. Of course, the above is only one specific embodiment of the present invention, but the present invention is not limited to this, and other connection methods can be used in specific implementations.

[0107] Meanwhile, to achieve the gas conveying function, the production system also includes a first negative pressure suction machine 24, a second cyclone dust collector 25, a third dust filter 26, a first vacuum valve group 27, a second negative pressure suction machine 28, a third cyclone dust collector 29, a fourth dust filter 30, a second vacuum valve group 31, a third negative pressure suction machine 32, and a central control cabinet 33. The first negative pressure suction machine 24 is connected to the third dust filter 26 through the second cyclone dust collector 25. The granulation material bin 6, each granulation silo 16, the crystallizer 7, the first dehumidifying dryer 12, and the transfer and heat preservation silo 13 are all connected to the third dust filter 26 through the first vacuum valve group 27, so as to use the negative pressure provided by the first negative pressure suction machine 24 to realize the material conveying. The second negative pressure suction machine 28 is connected to the fourth dust filter 30 through the third cyclone dust collector 29. Each thickening silo 18...

[0108] The high-viscosity silo 20, the second dehumidifying dryer 19, the third dehumidifying dryer 21, the integrated crystallization dryer 23, and the mixer 11 are all connected to the fourth dust filter 30 through the second vacuum valve group 31, so as to use the second negative pressure suction machine 28 to provide negative pressure to realize the material conveying; the third negative pressure suction machine 32 is used as a backup machine. When the first negative pressure suction machine 24 or the second negative pressure suction machine 28 fails, the third negative pressure suction machine 32 can be used to provide the negative pressure required for operation; the central control cabinet 33 is the overall control system of the entire production line. All the equipment that needs to be controlled is electrically connected to the central control cabinet 33 so as to use the central control cabinet 33 to control each piece of equipment. This invention equips the first negative pressure suction machine 24 with a second cyclone dust collector 25 and a third dust filter 26, and the second negative pressure suction machine 28 with a third cyclone dust collector 29 and a fourth dust filter 30. This allows for dust removal using the second cyclone dust collector 25, the third dust filter 26, the third cyclone dust collector 29, and the fourth dust filter 30 during actual use, ensuring that the exhaust gas from the gas conveying system meets national standards and preventing air pollution.

[0109] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A process for producing recycled zipper yarn, characterized in that, The production process includes: The recycled zipper material is sequentially fed to a coarse shearing machine for coarse shearing, a fine shearing machine for fine shearing, an extruder for melt extrusion molding, a zipper pelletizer for zipper pelletizing, and a vibrating screen for vibrating screening. The screened recycled chips are then transported to a pelletizing container for storage. The stored recycled chips are transported to a crystallizer for crystallization. The crystallized recycled chips are then transported to a thickening device for thickening. The thickened recycled chips are then transported to a cooling silo for cooling. At the same time, a heat recovery and reuse device set between the cooling silo and the crystallizer is used to recover and reuse heat energy. The cooled recycled chips are then transported to a mixing machine for mixing. The mixed material is then transported to a recycled monofilament production line for production.

2. The recycled zipper yarn production process according to claim 1, characterized in that, The heat recovery and reuse device installed between the cooling silo and the crystallizer specifically includes: The hot air from the top of the cooling silo is drawn into the first heat exchanger by a cooling fan, while the outside air is drawn into the first heat exchanger by a crystallizer fan. The hot air and the outside air exchange heat for the first time in the first heat exchanger. The air after the first heat exchange is then transported to the cooler by the cooling fan for cooling, and the cooled air is then transported to the bottom of the cooling silo to cool the regenerated chips. The outside air after the first heat exchange is sent to the second heat exchanger, and the hot air at the top of the crystallizer is also sent to the second heat exchanger, so that the outside air and the hot air can exchange heat energy for the second time in the second heat exchanger. The outside air after the second heat exchange is fed into the crystallizer heating box and heated to the required process temperature before being output to the crystallizer. The hot air containing moisture after the second heat exchange is discharged.

3. The recycled zipper yarn production process according to claim 2, characterized in that, Before the hot air from the top of the cooling silo is drawn into the first heat exchanger, the process further includes: first inputting the hot air from the top of the cooling silo into the first cyclone dust collector for cyclone dust removal, and then sending the hot air to the first dust filter for dust removal and filtration. Before delivering the hot air from the top of the crystallizer to the second heat exchanger, the process also includes: inputting the hot air from the top of the crystallizer to a second dust filter for dust removal and filtration.

4. The recycled zipper yarn production process according to claim 1, characterized in that, Before conveying the crystallized regenerated slices to the thickening device for thickening, the process also includes conveying the crystallized regenerated slices to the first dehumidifying dryer for dehumidification and drying.

5. The recycled zipper yarn production process according to claim 4, characterized in that, After the crystallized recycled chips are conveyed to the first dehumidifying dryer for dehumidification and drying, the process also includes: conveying the dehumidified and dried recycled chips to the transfer and insulation silo for insulation, and then conveying the insulation recycled chips to the thickening device for thickening.

6. The process for producing recycled zipper yarn according to claim 5, characterized in that, The process of conveying the viscous recycled chips to the cooling silo for cooling specifically involves using a positive pressure conveyor to rapidly convey the viscous recycled chips to the cooling silo for cooling. The process of conveying the heat-insulated recycled chips to the adhesion-enhancing device specifically involves using a positive pressure conveyor to rapidly convey the heat-insulated recycled chips to the adhesion-enhancing device for adhesion enhancement.

7. The process for producing recycled zipper yarn according to claim 1, characterized in that, After the screened recycled chips are transported to the granulation container for storage, the process also includes: transporting recycled chips with different viscosity characteristics to different granulation silos according to different zipper materials; separating the recycled chips in different granulation silos and transporting them to the crystallizer for crystallization; and controlling the thickening device to thicken the recycled chips with different process times according to the different viscosity characteristics of the recycled chips.

8. The process for producing recycled zipper yarn according to claim 7, characterized in that, After the viscous recycled chips are transported to a cooling silo for cooling, the process also includes: transporting the cooled recycled chips to a dust removal device for dust removal, and, according to the different viscosity characteristics of the recycled chips, transporting the dust-removed recycled chips to the corresponding viscous silo for storage.

9. The process for producing recycled zipper yarn according to claim 8, characterized in that, The step of conveying the cooled regenerated chips to a mixer for mixing specifically includes: The recycled chips stored in the viscosity-enhancing silo are conveyed to the second dehumidifying dryer for dehumidification and drying. The high-viscosity material in the high-viscosity silo is conveyed to the third dehumidifying dryer for dehumidification and drying. The color masterbatch material in the color masterbatch silo is conveyed to the integrated crystallization and drying machine for crystallization and drying. According to production needs, the dehumidified and dried recycled chips, the dehumidified and dried high-viscosity material, or the crystallized and dried color masterbatch material are conveyed to the mixer for mixing.

10. The process for producing recycled zipper yarn according to claim 1, characterized in that, The mixer is a weighing mixer, and according to the required proportions of various materials, the weighing mixer is used to weigh various materials before mixing them.

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