Efficient production line for flame-retardant environment-friendly polypropylene fiber yarns

Abstract

The invention relates to the technical field of high-performance polypropylene fibers, and particularly discloses an efficient production line for flame-retardant environment-friendly polypropylene fiber yarns, which comprises a material mixing mechanism, an impurity removal mechanism, an extrusion filament forming mechanism, a water cooling mechanism, a stretching shaping mechanism and a winding mechanism which are arranged in sequence, the mixing mechanism is used for melting and mixing PP master batches, color master batches, a flame retardant and other auxiliaries, the impurity removal mechanism is used for removing impurities from molten materials, the extrusion filament forming mechanism is communicated with the tail end of the impurity removal mechanism and used for extruding the materials subjected to impurity removal into filaments, and the extrusion filament forming mechanism is communicated with the tail end of the impurity removal mechanism and used for extruding the materials subjected to impurity removal into the filaments. The water cooling mechanism is connected with a filament outlet of the extrusion filament forming mechanism, the water cooling mechanism is used for cooling and solidifying the filament materials, the stretching and shaping mechanism is used for stretching and shaping the cooled and solidified filament materials, and the winding mechanism is located behind the stretching and shaping mechanism and used for collecting shaped yarn products. The method has the effects of improving the product percent of pass, reducing the production cost and improving the production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of high-performance polypropylene, and in particular to an efficient production line for flame-retardant and environmentally friendly polypropylene yarn. Background Art

[0002] Flame-retardant and environmentally friendly polypropylene yarn is widely used in the fields of new energy vehicle interior decoration, such as webbing and carpets in the car. This type of product not only achieves lightweight design, but also has excellent flame retardant and environmentally friendly properties. With the increasing market demand for high-quality and high-performance polypropylene products, the production and application of flame-retardant and environmentally friendly polypropylene yarn has developed rapidly, becoming an important means to improve product quality and meet market demand.

[0003] Flame-retardant and environmentally friendly polypropylene is usually made of PP masterbatch, color masterbatch, flame retardant and other additives. In the actual production process of flame-retardant and environmentally friendly yarn, it is necessary to mix PP masterbatch, color masterbatch, flame retardant and other additives, and then extrude the mixed materials into filaments through an extruder. Subsequently, the extruded yarn is cooled and stretched to shape, and finally the formed polypropylene yarn is wound.

[0004] However, due to the differences in the physical properties of various raw materials, uneven mixing can easily occur, which in turn affects the quality of the extruded filaments. This quality problem not only reduces the product qualification rate, but also increases production costs and restricts the overall efficiency of the production line. This problem needs to be solved urgently. Summary of the invention

[0005] In order to improve product qualification rate, reduce production costs and improve production efficiency, the present application provides a high-efficiency production line for flame-retardant and environmentally friendly polypropylene yarn.

[0006] The present application provides an efficient production line for flame-retardant and environmentally friendly polypropylene yarn, which adopts the following technical solution: A high-efficiency production line for flame-retardant and environment-friendly polypropylene yarn comprises a mixing mechanism, a cleaning mechanism, an extrusion filament mechanism, a water cooling mechanism, a stretching and shaping mechanism and a winding mechanism which are arranged in sequence, wherein the mixing mechanism is used for melt-mixing PP masterbatch, color masterbatch, flame retardant and other additives, the head end of the cleaning mechanism is connected with the mixing mechanism, the cleaning mechanism is used for cleaning the molten material, the extrusion filament mechanism is connected with the end of the cleaning mechanism, the extrusion filament mechanism is used for extruding the cleaned material into filaments, the water cooling mechanism is connected with the filament outlet of the extrusion filament mechanism, the water cooling mechanism is used for cooling and solidifying the filamentary material, the stretching and shaping mechanism is located behind the water cooling mechanism and is used for stretching and shaping the cooled and solidified filamentary material, and the winding mechanism is located behind the stretching and shaping mechanism and is used for collecting the shaped yarn product.

[0007] By adopting the above technical scheme, when it is necessary to produce flame-retardant and environmentally friendly polypropylene yarn, PP masterbatch, color masterbatch, flame retardant and other additives are poured into the mixing mechanism, and the mixing mechanism melts and mixes the PP masterbatch, color masterbatch, flame retardant and other additives. Due to the different melting points of the PP masterbatch and the color masterbatch, impurities are mixed in the molten material. The molten mixed material is passed into the impurity removal mechanism, and the impurity removal mechanism removes impurities in the molten material. The molten material after impurity removal is passed into the extrusion filament formation mechanism, and the extrusion filament formation mechanism extrude the material into filaments, and then the water cooling mechanism cools and solidifies the filamentary material. The cooled and solidified filamentary material is wound in the winding mechanism after the stretching and shaping operation of the stretching and shaping mechanism. The entire production process of the flame-retardant and environmentally friendly polypropylene yarn is carried out in an orderly manner, and impurities in the mixed molten material are removed, which is beneficial to improving the product qualification rate, reducing production costs and improving production efficiency.

[0008] Preferably, the impurity removal mechanism includes a connecting pipe and a filter screen, one end of the connecting pipe is connected to the mixing mechanism, and the other end of the connecting pipe is connected to the extrusion filament forming mechanism, and the filter screen is detachably connected to the inside of the connecting pipe.

[0009] By adopting the above technical solution, the connecting pipe connects the mixing mechanism and the extrusion wire-forming mechanism together, so that the molten material in the mixing mechanism is transferred to the extrusion wire-forming mechanism. During the transfer process, the filter screen filters the impurities in the molten material, which is beneficial to improve the product qualification rate. The detachable connection of the filter screen facilitates the replacement and cleaning of the filter screen.

[0010] Preferably, the connecting tube is surrounded by a first heating tube along its length direction.

[0011] By adopting the above technical solution, the first heating tube keeps the material in a molten state, which facilitates the filtering operation of the filter screen.

[0012] Preferably, the connecting pipe is connected to an exhaust gas treatment system for treating exhaust gas.

[0013] By adopting the above technical solution, the tail gas treatment system removes the tail gas generated by the stirring and mixing operation, which is beneficial to improving product quality and meeting the requirements of environmentally friendly production.

[0014] Preferably, the mixing mechanism includes a mixing tank, a stirring assembly and a second heating tube. The bottom of the mixing tank is connected to the impurity removal mechanism. The stirring assembly is arranged on the mixing tank to stir and mix the materials inside the mixing tank. The second heating tube is arranged around the mixing tank.

[0015] By adopting the above technical solution, PP masterbatch, color masterbatch, flame retardant and other additives are poured into the mixing tank, and then the stirring component stirs and mixes the various raw materials in the mixing tank. During the stirring and mixing process, the second heating tube heats the mixing tank to facilitate the mixing of various materials.

[0016] Preferably, the water cooling mechanism includes a water cooling box and a water circulation system, the water cooling box is arranged at the wire outlet of the extrusion wire forming mechanism, and the water circulation system is arranged on the water cooling box for circulating water supply to the water cooling box.

[0017] By adopting the above technical solution, the filamentary material is extruded from the wire outlet of the extrusion wire-forming mechanism and enters the water cooling box. The water in the water cooling box cools and solidifies the filamentary material, and the water circulation system circulates water to the water cooling box to maintain the cooling effect.

[0018] Preferably, the water circulation system includes a water collecting tank, a water supply pipe and a water supply pump. The water collecting tank is located on one side of the water cooling box, one end of the water supply pipe is connected to the water collecting tank, and the other end of the water supply pipe is connected to the bottom of the water cooling box. The water supply pump is connected to the water supply pipe and is used to pump the water in the water collecting tank into the water cooling box through the water supply pipe. A drain outlet is opened at a high position on the side wall of the water cooling box, and the drain outlet is connected to the water collecting tank.

[0019] By adopting the above technical solution, the water supply pump pumps the cooled water in the water collecting tank to the water cooling box through the water supply pipe. As the water in the water cooling box increases, the water at the high point in the water cooling box overflows through the drain outlet, and the water collecting tank receives the overflowed water, thereby realizing circulating water supply.

[0020] Preferably, the stretching and shaping mechanism includes a support frame, a first roller and a second roller, the support frame is located behind the water cooling mechanism, the first roller is parallel to the second roller, the first roller and the second roller are both rotatably connected to the support frame, the first roller is close to the water cooling mechanism, the second roller is close to the winding mechanism, and the rotation speed of the second roller is greater than the rotation speed of the first roller.

[0021] By adopting the above technical solution, the support frame supports the first roller and the second roller. The yarn after cooling and solidification is wound around the first roller and then around the second roller. The rotation speed of the second roller is greater than the rotation speed of the first roller, so that the yarn between the first roller and the second roller has a stretching force, thereby realizing the stretching and shaping operation of the yarn.

[0022] Preferably, the stretching and shaping mechanism further comprises a heating box, wherein the heating box is fixedly mounted on the supporting frame and located between the first rotating roller and the second rotating roller, and a limiting roller around which the yarn product is wound is arranged in the heating box.

[0023] By adopting the above technical solution, during the process of stretching and shaping the yarn between the first roller and the second roller, the yarn passes into the heating box, and the limiting roller limits the yarn so that the yarn can always be in the heating box. The heating box heats the yarn, and the yarn softens to facilitate the stretching and shaping operation.

[0024] Preferably, the heating box is filled with hot water, the temperature range of the hot water is set to 85°C-115°C, the limiting roller is immersed in the hot water, and absorbent cotton is provided at one end of the heating box close to the second rotating roller.

[0025] By adopting the above technical solution, the yarn is immersed in hot water with a temperature range of 85°C-115°C to achieve heating and softening of the yarn without causing damage to the yarn. The absorbent cotton removes the water on the yarn after stretching and shaping to facilitate the subsequent winding of the yarn.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting a mixing mechanism, an impurity removal mechanism, an extrusion filament mechanism, a water cooling mechanism, a stretching and shaping mechanism and a winding mechanism, when it is necessary to produce flame-retardant and environmentally friendly polypropylene yarn, PP masterbatch, color masterbatch, flame retardant and other additives are poured into the mixing mechanism, and the mixing mechanism melts and mixes the PP masterbatch, color masterbatch, flame retardant and other additives. Due to the different melting points of the PP masterbatch and the color masterbatch, impurities are mixed in the molten material. The molten mixed material is passed into the impurity removal mechanism, and the impurity removal mechanism removes impurities from the molten material. The molten material after impurity removal is passed into the extrusion filament mechanism, and the extrusion filament mechanism extrude the material into filaments, and then the water cooling mechanism cools and solidifies the filamentary material. The cooled and solidified filamentary material is wound in the winding mechanism after the stretching and shaping operation of the stretching and shaping mechanism. The entire production process of the flame-retardant and environmentally friendly polypropylene yarn is carried out in an orderly manner, and impurities in the mixed molten material are removed, which is beneficial to improving the product qualification rate, reducing production costs and improving production efficiency.

[0027] 2. By setting a connecting pipe and a filter screen, the connecting pipe connects the mixing mechanism and the extrusion wire-forming mechanism together, so that the molten material in the mixing mechanism is transferred to the extrusion wire-forming mechanism. During the transfer process, the filter screen filters the impurities in the molten material, which is beneficial to improve the product qualification rate. The detachable connection of the filter screen facilitates the replacement and cleaning of the filter screen.

[0028] 3. By connecting the exhaust gas treatment system to the connecting pipe, the exhaust gas treatment system removes the exhaust gas generated by the stirring and mixing operation, which is beneficial to improving product quality and meeting the requirements of environmentally friendly production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the flame-retardant and environmentally friendly polypropylene yarn high-efficiency production line in the embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the structures of the mixing mechanism, the impurity removal mechanism and the extrusion filament formation mechanism in the embodiment of the present application.

[0031] Figure 3 It is a vertical cross-sectional view of the mixing tank in the embodiment of the present application.

[0032] Figure 4 It is a structural schematic diagram of the water cooling mechanism in the embodiment of the present application.

[0033] Figure 5 It is a structural schematic diagram of the water cooling mechanism from another perspective in the embodiment of the present application.

[0034] Figure 6 It is a structural schematic diagram of the stretching and shaping mechanism in the embodiment of the present application.

[0035] Description of reference numerals: 1. Mixing mechanism; 11. Mixing tank; 12. Stirring assembly; 2. Impurity removal mechanism; 21. Connecting pipe; 22. Exhaust gas treatment system; 3. Extrusion filament mechanism; 4. Water cooling mechanism; 41. Water cooling box; 42. Water circulation system; 421. Water collecting tank; 422. Water supply pipe; 423. Water supply pump; 5. Stretching and shaping mechanism; 51. Support frame; 52. First rotating roller; 53. Second rotating roller; 54. Heating box; 6. Winding mechanism; 7. Drainage outlet; 8. Limiting roller; 9. Absorbent cotton. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-6 This application is described in further detail.

[0037] The present application embodiment discloses an efficient production line for flame retardant and environmentally friendly polypropylene yarn, referring to Figure 1, including a mixing mechanism 1, a cleaning mechanism 2, an extrusion filament mechanism 3, a water cooling mechanism 4, a stretching and shaping mechanism 5 and a winding mechanism 6 which are arranged in sequence. The mixing mechanism 1 is used to melt and mix PP masterbatch, color masterbatch, flame retardant and other additives, the head end of the cleaning mechanism 2 is connected to the mixing mechanism 1, the cleaning mechanism 2 is used to remove impurities from the molten material, the extrusion filament mechanism 3 is connected to the end of the cleaning mechanism 2, the extrusion filament mechanism 3 is used to extrude the impurity-free material into filaments, the water cooling mechanism 4 is connected to the filament outlet of the extrusion filament mechanism 3, the water cooling mechanism 4 is used to cool and solidify the filamentary material, the stretching and shaping mechanism 5 is located behind the water cooling mechanism 4 and is used to stretch and shape the cooled and solidified filamentary material, and the winding mechanism 6 is located behind the stretching and shaping mechanism 5 and is used to collect the shaped yarn products. In the production process of flame-retardant and environmentally friendly polypropylene yarn, each process is carried out in an orderly manner, and the impurities remaining after melt mixing are removed to improve the product qualification rate, reduce production costs and improve production efficiency.

[0038] Reference Figure 1 and Figure 2 The mixing mechanism 1 includes a mixing tank 11, a stirring assembly 12 and a second heating tube. Figure 3 , the bottom of the mixing tank 11 is connected to the impurity removal mechanism 2, the stirring component 12 is arranged on the mixing tank 11 for stirring and mixing the materials inside the mixing tank 11, and the second heating tube is arranged around the mixing tank 11. In the present embodiment, the mixing tank 11 can be made of stainless steel, which has good corrosion resistance and high temperature resistance, and its capacity can be selected according to production needs, such as a larger or smaller capacity. The stirring component 12 is driven by an electric motor and includes a main shaft and a plurality of stirring blades. The stirring blades can be spiral or paddle-shaped to adapt to materials of different viscosities. The second heating tube is wound with an electric heating wire, and the temperature is controlled by a thermostat to ensure that the materials are fully mixed at a suitable temperature. The above structure is a conventional setting of the stirring structure and will not be repeated here.

[0039] It should be noted that the mixing mechanism 1 is also provided with a temperature sensor and a pressure sensor (not shown in the figure). The temperature sensor is installed on the inner wall of the mixing tank 11 to monitor the actual temperature of the material and transmit the data to the central control system through the wireless communication module. The pressure sensor is installed on the top of the mixing tank 11 to monitor the pressure change during the mixing process and also feed back to the central control system through the wireless communication module. The central control system automatically adjusts the stirring time and heating power according to these data to ensure that the materials are mixed under optimal conditions.

[0040] Reference Figure 2, the impurity removal mechanism 2 includes a connecting pipe 21 and a filter screen. One end of the connecting pipe 21 is connected to the bottom of the mixing tank 11, and the other end of the connecting pipe 21 is connected to the extrusion filament forming mechanism 3. The extrusion forming mechanism can adopt a conventional extruder, which will not be described in detail here. The filter screen is detachably connected to the inside of the connecting pipe 21. In the present embodiment, the connecting pipe 21 is made of stainless steel, and the inner diameter can be adjusted as needed, such as a larger or smaller inner diameter. The filter screen can be selected from a metal mesh or a ceramic filter element. The former is suitable for removing large particles of impurities, while the latter is more suitable for filtering fine impurities. In order to prevent the filter screen from being blocked, a vibrator can be set outside the connecting pipe 21 to vibrate the filter screen regularly to keep it unobstructed. At the same time, the detachable connection of the filter screen facilitates the replacement and cleaning of the filter screen.

[0041] Reference Figure 2 The connecting pipe 21 is surrounded by a first heating pipe along its length to keep the material in a molten state, thereby facilitating the filtering operation of the filter screen. In addition, the connecting pipe 21 is connected to an exhaust gas treatment system 22 for treating exhaust gas above the position close to the extrusion filament forming mechanism 3 to remove the exhaust gas generated by the stirring and mixing operation, which is beneficial to improving product quality and meets the requirements of environmentally friendly production.

[0042] Reference Figure 1 and Figure 4 The water cooling mechanism 4 includes a water cooling box 41 and a water circulation system 42. Specifically, the water cooling box 41 is arranged at the wire outlet of the wire extrusion mechanism 3, and the water circulation system 42 is arranged on the water cooling box 41 for circulating water supply to the water cooling box 41. In this embodiment, the water cooling box 41 is made of aluminum alloy. Figure 5 The water circulation system 42 includes a water collecting tank 421, a water supply pipe 422 and a water supply pump 423. The water collecting tank 421 is located on one side of the water cooling box 41. One end of the water supply pipe 422 is connected to the water collecting tank 421, and the other end of the water supply pipe 422 is connected to the bottom of the water cooling box 41. The water supply pump 423 is connected to the water supply pipe 422 and is used to pump the water in the water collecting tank 421 into the water cooling box 41 through the water supply pipe 422. A drain port 7 is provided at a high position on the side wall of the water cooling box 41, and the drain port 7 is connected to the water collecting tank 421. The water supply pump 423 pumps the cooled water in the water collecting tank 421 into the water cooling box 41 through the water supply pipe 422. As the water in the water cooling box 41 increases, the water at the high position in the water cooling box 41 overflows through the drain port 7, and the water collecting tank 421 receives the overflowed water, thereby realizing circulating water supply. It should be noted that the water supply pump 423 adopts frequency conversion control to automatically adjust the flow rate according to the actual water consumption, thereby saving energy.

[0043] Reference Figure 6, the stretching and shaping mechanism 5 includes a support frame 51, a first roller 52 and a second roller 53, the support frame 51 is located behind the water cooling box 41, the first roller 52 is parallel to the second roller 53, the first roller 52 and the second roller 53 are both rotatably connected to the support frame 51, the first roller 52 is close to the water cooling box 41, the second roller 53 is close to the winding mechanism 6, and the rotation speed of the second roller 53 is greater than the rotation speed of the first roller 52, so that the yarn between the first roller 52 and the second roller 53 has a stretching force, thereby realizing the stretching and shaping operation during the conveying process of the yarn, which is convenient and fast. In this embodiment, the support frame 51 is made of high-strength steel, and the structure is stable and reliable. In addition, the surface of the first roller 52 and the second roller 53 is covered with a wear-resistant rubber layer to reduce friction damage. In order to ensure uniform yarn tension, a tensioning device can also be set between the first roller 52 and the second roller 53, and the tension is adjusted by a spring or a cylinder.

[0044] Reference Figure 6 The stretching and shaping mechanism 5 also includes a heating box 54, which is fixedly arranged on the support frame 51 and located between the first roller 52 and the second roller 53. A limiting roller 8 is arranged in the heating box 54 for the yarn product to surround. In this embodiment, the heating box 54 is made of heat-insulating material, and is filled with hot water. The temperature range of the hot water is set to 85°C-115°C. The limiting roller 8 is immersed in the hot water. At the same time, a water-absorbing cotton 9 is arranged at one end of the heating box 54 close to the second roller 53. The yarn transported from the heating box 54 passes through the water-absorbing cotton 9, and the water-absorbing cotton 9 absorbs the water stains on the surface of the yarn. The design of the heating box 54 can effectively improve the strength and toughness of the yarn, while avoiding fiber breakage due to excessive temperature.

[0045] Replay Figure 1 The winding mechanism 6 is located behind the stretching and shaping mechanism 5 and is used to collect the shaped yarn products. Specifically, the winding mechanism 6 includes a motor, a reducer, a reel and a controller. In this embodiment, the motor adopts a servo motor with high precision and fast response, and drives the reel to rotate through the reducer. The surface of the reel is smooth and flat, and it is not easy to scratch the yarn. The controller integrates multiple functions, such as speed adjustment and tension control, to ensure a smooth and orderly winding process. In addition, a weighing sensor can be set under the reel to monitor the yarn weight in real time, and automatically stop when the set value is reached, which is convenient for reel changing operations.

[0046] The implementation principle of an efficient production line for flame-retardant and environmentally friendly polypropylene yarn in the embodiment of the present application is as follows: when it is necessary to produce flame-retardant and environmentally friendly polypropylene yarn, PP masterbatch, color masterbatch, flame retardant and other additives are poured into a mixing tank 11, a stirring component 12 stirs and mixes the materials in the mixing tank 11, a second heating tube surrounds the mixing tank 11 to ensure that the materials are fully mixed at a suitable temperature, the mixed molten material enters the extrusion filament forming mechanism 3 through a connecting pipe 21, and in the process of the molten material passing through the connecting pipe 21, a filter screen filters impurities, and an exhaust gas treatment system 2 2. The tail gas generated by the stirring and mixing operation is removed to improve the production quality of the product. The yarn extruded through the outlet of the extrusion filament forming mechanism 3 is immersed in a water cooling box 41 for cooling and solidification. Then, the yarn is stretched and shaped by the cooperation of the first roller 52, the second roller 53 and the heating box 54 in the stretching and shaping mechanism 5, so as to obtain a flame-retardant and environmentally friendly polypropylene yarn product that meets the specifications, and finally wound in the winding mechanism 6. Each process is carried out in an orderly manner, and the impurities remaining after melt mixing are removed to improve the product qualification rate, reduce production costs and improve production efficiency.

[0047] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An efficient production line for flame-retardant and environmentally friendly polypropylene yarn, characterized by: The invention comprises a mixing mechanism (1), an impurity removal mechanism (2), an extrusion filament mechanism (3), a water cooling mechanism (4), a stretching and shaping mechanism (5) and a winding mechanism (6) which are arranged in sequence. The mixing mechanism (1) is used for melting and mixing PP masterbatch, color masterbatch, flame retardant and other additives. The head end of the impurity removal mechanism (2) is connected to the mixing mechanism (1). The impurity removal mechanism (2) is used for removing impurities from the molten material. The extrusion filament mechanism (3) is connected to the impurity removal mechanism (2). The two ends are connected, the extrusion filament forming mechanism (3) is used to extrude the impurity-removed material into filaments, the water cooling mechanism (4) is connected to the filament outlet of the extrusion filament forming mechanism (3), the water cooling mechanism (4) is used to cool and solidify the filamentary material, the stretching and shaping mechanism (5) is located behind the water cooling mechanism (4) and is used to stretch and shape the cooled and solidified filamentary material, and the winding mechanism (6) is located behind the stretching and shaping mechanism (5) and is used to collect the shaped yarn product.

2. The high-efficiency production line for flame-retardant and environmentally friendly polypropylene yarn according to claim 1, characterized in that: The impurity removal mechanism (2) comprises a connecting pipe (21) and a filter screen, one end of the connecting pipe (21) is connected to the mixing mechanism (1), the other end of the connecting pipe (21) is connected to the extrusion filament forming mechanism (3), and the filter screen is detachably connected to the inside of the connecting pipe (21).

3. The high-efficiency production line for flame-retardant and environmentally friendly polypropylene yarn according to claim 2 is characterized in that: The connecting pipe (21) is surrounded by a first heating pipe along its length direction.

4. The high-efficiency production line for flame-retardant and environmentally friendly polypropylene yarn according to claim 2 is characterized in that: The connecting pipe (21) is connected to an exhaust gas treatment system (22) for treating exhaust gas.

5. The high-efficiency production line for flame-retardant and environmentally friendly polypropylene yarn according to claim 1, characterized in that: The mixing mechanism (1) comprises a mixing tank (11), a stirring component (12) and a second heating tube. The bottom of the mixing tank (11) is connected to the impurity removal mechanism (2). The stirring component (12) is arranged on the mixing tank (11) for stirring and mixing the materials inside the mixing tank (11). The second heating tube is arranged around the mixing tank (11).

6. The high-efficiency production line for flame-retardant and environmentally friendly polypropylene yarn according to claim 1, characterized in that: The water cooling mechanism (4) comprises a water cooling box (41) and a water circulation system (42); the water cooling box (41) is arranged at the wire outlet of the wire extrusion mechanism (3); and the water circulation system (42) is arranged on the water cooling box (41) for circulating water to the water cooling box (41).

7. The high-efficiency production line for flame-retardant and environmentally friendly polypropylene yarn according to claim 6, characterized in that: The water circulation system (42) comprises a water collecting tank (421), a water supply pipe (422) and a water supply pump (423); the water collecting tank (421) is located on one side of the water cooling box (41); one end of the water supply pipe (422) is connected to the water collecting tank (421); the other end of the water supply pipe (422) is connected to the bottom of the water cooling box (41); the water supply pump (423) is connected to the water supply pipe (422) and is used to pump the water in the water collecting tank (421) into the water cooling box (41) through the water supply pipe (422); a drain port (7) is provided at a high position on the side wall of the water cooling box (41); the drain port (7) is connected to the water collecting tank (421).

8. The high-efficiency production line for flame-retardant and environmentally friendly polypropylene yarn according to claim 1, characterized in that: The stretching and shaping mechanism (5) comprises a support frame (51), a first roller (52) and a second roller (53); the support frame (51) is located behind the water cooling mechanism (4); the first roller (52) is parallel to the second roller (53); the first roller (52) and the second roller (53) are both rotatably connected to the support frame (51); the first roller (52) is close to the water cooling mechanism (4); the second roller (53) is close to the winding mechanism (6); and the rotation speed of the second roller (53) is greater than the rotation speed of the first roller (52).

9. The high-efficiency production line for flame-retardant and environmentally friendly polypropylene yarn according to claim 8, characterized in that: The stretching and shaping mechanism (5) further comprises a heating box (54), wherein the heating box (54) is fixedly arranged on the support frame (51), and the heating box (54) is located between the first rotating roller (52) and the second rotating roller (53), and a limiting roller (8) around which the yarn product is wound is arranged in the heating box (54).

10. The high-efficiency production line for flame-retardant and environmentally friendly polypropylene yarn according to claim 9, characterized in that: The heating box (54) is filled with hot water, the temperature range of the hot water is set to 85°C-115°C, the limiting roller (8) is immersed in the hot water, and absorbent cotton (9) is arranged at one end of the heating box (54) close to the second rotating roller (53).

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