Energy-saving production method and device for high-strength polyethylene fiber melt spinning

Abstract

The application discloses a kind of high-strength polyethylene fiber melt spinning energy-saving production method and device, it is related to high-strength polyethylene spinning production technical field, comprising the following steps: (1) polyethylene resin is added to screw extruder melt plasticization, then extruded through the spinning pack with inner blow pipe and spinneret;(2) extruded polyethylene melt passes through ring blowing area into water bath tank, and obtains nascent filament;(3) ring air induction zone is provided below ring blowing area, and ring air induction zone is communicated to heat exchanger by blowing pipeline through negative pressure fan, and the heat exchanger is used to cool hot air and deliver heat energy to water bath tank;(4) blowing pipeline of heat exchanger is communicated circulating fan, and cooled hot air is sent into ring blowing area and inner blow pipe.The application utilizes the cooling mode of inner blow pipe combined with outer ring blowing, avoids the problem that spinning stretch degree is inconsistent at the center of existing spinning area, and recycles spinning heat for further utilization, in line with the design concept of energy saving and environmental protection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-strength polyethylene fiber melt spinning, in particular to a high-strength polyethylene fiber melt spinning energy-saving production method and device. BACKGROUND

[0002] In the production process of high-strength polyethylene fiber melt spinning, the raw material is in a high-pressure molten state when spinning, and is extruded from the small holes of the spinneret. In order to reduce broken filaments and enable the spinning to start and the filaments to be introduced, the liquid filament bundle needs to be cooled rapidly so that it changes from a molten state to a glassy state. When spinning, thousands of filaments are uniformly distributed in one spinning position. The blowing and cooling form of the filament bundle is usually side blowing and ring blowing. The ring blowing form is further divided into center-out ring blowing and center-in ring blowing.

[0003] When the existing technology cools the high-strength polyethylene fiber melt spinning through the center-out ring blowing technology, the cooling air blows from the outer ring to the center. When the cooling air blows from the outside to the inside, the filament bundle drifts to the center of the air duct while completing the downward movement. At this time, the filament bundle has not been completely cooled, so the wind speed cannot be too large, otherwise the filaments will stick to each other due to mutual contact. When the cooling air blows to the filament bundle, the air temperature in the center of the air duct rises due to heat exchange, and the cooling effect of the filament bundle in the center is greatly weakened. The uniformity of the filament bundle required for cooling is affected, the cooling effect is not ideal, and the quality of the finished filament bundle is reduced. Stable cooling conditions can form an ideal and uniform temperature distribution on the spinning line, which is more conducive to the stability of the subsequent drawing and the quality of the raw filaments. SUMMARY

[0004] The purpose of the present application is to provide a high-strength polyethylene fiber melt spinning energy-saving production method and device to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose of the application, the following technical solutions are adopted:

[0006] The present application provides a high-strength polyethylene fiber melt spinning energy-saving production method, which comprises the following steps:

[0007] (1) polyethylene resin is added to the screw extruder for melting and plasticizing, and then extruded through a spinning assembly with an inner blowing pipe and a spinneret;

[0008] (2) the extruded polyethylene melt passes through a ring blowing area and enters a water bath tank to obtain primary filaments;

[0009] (3) a ring air induction area is arranged below the ring blowing area, the ring air induction area is connected to a heat exchanger through a blowing pipe by a negative pressure fan, and the heat exchanger is used to cool the hot air and deliver heat to the water bath tank;

[0010] (4) The blowing pipeline of the heat exchanger is communicated with the circulating fan, and the cooled hot air is sent into the circular blowing area and the inner blowing pipeline.

[0011] The application also provides a production device specially used for the energy-saving production method of the high-strength polyethylene fiber melt spinning, which comprises a spinning component, a circular blowing component and a hot air circulating component.

[0012] The spinning component comprises an inner blowing pipeline, a spinning ring and an inner blowing spinneret plate, the inner blowing spinneret plate is a horn-shaped plate with uniform thickness, and the spinning holes vertically penetrating through the inner blowing spinneret plate are uniformly and densely arranged along the horizontal direction; the inner blowing pipeline is arranged at the central hole of the inner blowing spinneret plate, and the pipe body of the inner blowing pipeline is uniformly provided with air guiding holes; the spinning ring is surrounded outside the inner blowing spinneret plate and connected with the circular blowing cylinder.

[0013] The circular blowing component comprises a wind guide cylinder, a wind channel cavity, a circular blowing cylinder, a wind uniformizing ring and circular blowing holes, the wind guide cylinder is used to connect the blowing pipeline communicated with the output end of the circulating fan; the circular blowing cylinder is a hollow shell, the inner cavity of which bears the wind pressure and blows the air to the spinning area; the wind uniformizing ring is correspondingly arranged at the bottom port of the circular blowing cylinder; the wind channel cavity is a ring-shaped cavity coaxial with the circular blowing cylinder and used to connect the wind guide cylinder and the bottom port of the circular blowing cylinder; the circular blowing holes are uniformly arranged on the inner side wall of the circular blowing cylinder and connected with the spinning area and the inner cavity of the circular blowing cylinder.

[0014] The hot air circulating component comprises a wind guiding ring, a negative pressure fan, a blowing pipeline, a heat exchanger and a circulating fan, the wind guiding ring is coaxial with the circular blowing cylinder and arranged below the wind channel cavity, so as to surround the spinning area, the wind guiding ring comprises a ring-shaped wind guiding port connected with the spinning area and a wind guiding ring shell; the wind guiding ring introduces the hot air of the spinning area into the heat exchanger through the blowing pipeline and the negative pressure fan, and the cooled air after heat exchange is introduced into the wind guide cylinder and the inner blowing pipeline through the circulating fan.

[0015] Further, the front end of the wind guide cylinder is uniformly divided into a first wind guide port, a second wind guide port and a third wind guide port through the vertical partition plate, the wind channel cavity is equally divided into a first wind channel cavity, a second wind channel cavity and a third wind channel cavity by the partition plate, the inner cavity of the circular blowing cylinder is equally divided into a first wind pressure cavity, a second wind pressure cavity and a third wind pressure cavity by the partition plate according to the wind channel cavity, and the first wind guide port, the first wind channel cavity and the first wind pressure cavity are communicated, the second wind guide port, the second wind channel cavity and the second wind pressure cavity are communicated, and the third wind guide port, the third wind channel cavity and the third wind pressure cavity are communicated.

[0016] Further, the inner blowing pipe is internally divided into a first flow guide cavity, a second flow guide cavity and a third flow guide cavity by a partition fan, and corresponds to the first air pressure cavity, the second air pressure cavity and the third air pressure cavity respectively, and the temperature sensor is arranged in the spinning area along the pipe body corresponding to the first flow guide cavity, the second flow guide cavity and the third flow guide cavity respectively.

[0017] Further, the upper port of the inner blowing pipe is provided with an adjusting assembly for adjusting the gas flow into the first flow guide cavity, the second flow guide cavity and the third flow guide cavity.

[0018] Further, the adjusting assembly comprises electromagnetic flow valves for sealingly communicating the first flow guide cavity, the second flow guide cavity and the third flow guide cavity respectively.

[0019] Compared with the prior art, the above one or more technical solutions have the following beneficial effects:

[0020] Firstly, the inner blowing pipe is combined with the outer ring blowing, the ring blowing blows in the form of concentric circles to the center, and blowing from the periphery to the center is beneficial to the cooling of the fiber bundle, and the inner blowing pipe is arranged at the center of the concentric circles, and the cooling gas flow is input into the inner blowing pipe, the gas flow reaches the spinning area from the inner blowing pipe, the blowing amount of the outer ring blowing cylinder to the spinning area is large, and the wind speed gradually decreases after heat exchange with the nascent yarn, and is relatively low when reaching the center area, therefore, due to the difference in gas flow speed, according to Bernoulli's principle, the cooling gas flow of the inner blowing pipe forms a low pressure area, so that the gas in the spinning area accelerates to the center, which is beneficial to maintaining the uniformity of the cooling of the ring blowing cylinder.

[0021] Secondly, the gas completing heat exchange in the spinning area enters the inner blowing pipe through the air guide holes arranged on the pipe body of the inner blowing pipe, which is beneficial to cooling the center of the spinning area, and further avoids the problem of inconsistent spinning stretch of the center area in the existing ring blowing technology.

[0022] Meanwhile, the cooling air of the spinning area and the cooling air of the inner blowing pipe in the application finally reach the air guide ring area at the bottom, and enter the blowing pipe from the annular air guide port, and are further sent into the heat exchanger by the negative pressure fan, which is beneficial to the recovery of the spinning heat, and can use the medium of the water bath tank as the medium of the heat exchanger, so as to realize the supply of heat to the water bath tank and the maintenance of water temperature, and embodies the design concept of energy saving and environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings accompanying the specification of the application form a part of the application and serve to provide further understanding of the application, and the exemplary embodiments of the application and their descriptions serve to explain the application, and do not constitute improper limitations on the application.

[0024] Figure 1It is the process schematic diagram of the energy-saving production method of high-strength polyethylene fiber melt spinning in the application.

[0025] Figure 2 It is the structural schematic diagram of the production device in the application.

[0026] Figure 3 It is Figure 2 Front view schematic diagram of the guide air cylinder.

[0027] Figure 4 It is Figure 3 Back view schematic diagram of the guide air cylinder.

[0028] Figure 5 It is the connection structure schematic diagram of the guide air cylinder and the air duct cavity in the application.

[0029] Figure 6 It is the cross-sectional structure schematic diagram of the ring air blowing cylinder in the application.

[0030] Figure 7 It is the cross-sectional structure schematic diagram of the inner air blowing pipe in the application.

[0031] Figure 8 It is the three-dimensional structure schematic diagram of the production device in the application.

[0032] In the figure:

[0033] 100, inner air blowing pipe, 110, first drainage cavity, 120, second drainage cavity, 130, third drainage cavity, 140, air guide hole;

[0034] 200, jet ring;

[0035] 300, inner air blowing jet plate, 310, jet hole;

[0036] 400, guide air cylinder, 410, first air guide port, 420, second air guide port, 430, third air guide port;

[0037] 500, air duct cavity, 510, first air duct cavity, 520, second air duct cavity, 530, third air duct cavity;

[0038] 600, ring air blowing cylinder, 610, first air pressure cavity, 620, second air pressure cavity, 630, third air pressure cavity, 640, air uniformizing ring, 650, ring air blowing hole;

[0039] 700, air guide ring, 710, negative pressure fan, 720, air blowing pipeline, 730, heat exchanger, 740, circulating fan;

[0040] 800, spinning area;

[0041] 900, temperature sensor, 910, electromagnetic flow valve. DETAILED DESCRIPTION

[0042] In order to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of the present application.

[0043] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0044] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0045] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0046] In addition, the terms "mount", "set", "provided with", "connected", "connected", "sleeved" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] As Figures 1-8As shown, a high-strength polyethylene fiber melt spinning production device of the present invention includes a spinneret assembly, a ring blower assembly, and a hot air circulation assembly, wherein:

[0048] like Figure 2 As shown, the spinneret assembly includes an inner air pipe 100, a spinneret ring 200, and an inner air spinneret plate 300. The inner air spinneret plate 300 is a trumpet-shaped plate with uniform thickness, and spinneret holes 310 are evenly and densely arranged vertically through the inner air spinneret plate 300 along the horizontal direction. The inner air pipe 100 is located at the center hole of the inner air spinneret plate 300, and air inlet holes 140 are evenly arranged on the body of the inner air pipe 100. The spinneret ring 200 surrounds the inner air spinneret plate 300 and is connected to a ring air blower 600.

[0049] Since both an annular air blower 600 and an inner air blower 100 are provided in this invention to achieve better spinning cooling quality, the inner air blower 100 also covers the area of ​​the spinneret hole at the center of the conventional spinneret. Therefore, it is necessary to provide more spinneret holes in the area between the inner air blower 100 and the annular air blower 600. However, providing more spinneret holes also requires consideration of the spinneret's strength. Otherwise, the spinneret is prone to deformation and damage under the action of spinning pressure. Therefore, this application adopts a trumpet-shaped inner air blower spinneret 300, so that the connecting surface between adjacent spinneret holes 310 is inclined, and the spacing between the inclined surfaces is also larger, thus having higher strength.

[0050] The annular air blowing assembly includes an air guide tube 400, an air duct cavity 500, an annular air blowing tube 600, an air distribution ring 640, and annular air blowing holes 650. The air guide tube 400 is used to connect to the air blowing pipe 720 connected to the output end of the circulating fan 740. The annular air blowing tube 600 is a hollow shell, and its inner cavity bears the air pressure and blows air to the spinning area 800. The air distribution ring 640 is correspondingly arranged at the bottom port of the annular air blowing tube 600. The air duct cavity 500 is an annular chamber coaxial with the annular air blowing tube 600 and is used to connect the air guide tube 400 and the bottom port of the annular air blowing tube 600. The annular air blowing holes 650 are evenly opened on the inner side wall of the annular air blowing tube 600 and connect the spinning area 800 and the inner cavity of the annular air blowing tube 600.

[0051] In order to better deliver cold air to the annular blower 600, this application adopts a side-guided airflow method to set up the air guide 400. The air guide 400 is used to receive the cold air, and the air duct cavity 500 is used to achieve the purpose of uniformly supplying air to the annular blower 600 along the circumference. Furthermore, a uniform airflow ring 640 is provided at the bottom port of the annular blower 600. The uniform airflow ring 640 is an annular metal mesh plate with uniformly spaced holes. Its function is to rectify the cold air entering the annular blower 600, thereby making the air pressure entering the spinning area 800 uniform.

[0052] The hot air circulation assembly comprises an air guide ring 700, a negative pressure fan 710, a blowing pipe 720, a heat exchanger 730 and a circulation fan 740. The air guide ring 700 is coaxial with the ring blowing cylinder 600 and is arranged below the air duct cavity 500 to surround the spinning area 800. The air guide ring 700 comprises a ring-shaped air guide opening and an air guide ring shell which are communicated with the spinning area 800. The hot air in the spinning area 800 is introduced into the heat exchanger 730 through the blowing pipe 720 and the negative pressure fan 710. The cooled air after heat exchange is introduced into the air guide cylinder 400 and the inner blowing pipe 100 through the circulation fan 740.

[0053] After the melt is spun, a large amount of solidification heat is released to the surrounding air. Therefore, cold air must be blown after spinning to carry away the released heat and make the melt stream solidify into fibers. During the cooling and solidification process, uniform air supply is important. Uneven air supply will cause uneven fiber evenness and reduce spinning quality. Therefore, since the spinning area 800 is in the shape of a cylindrical area, the present application first supplies uniform air pressure to the spinning area 800 along the circumferential direction through the ring blowing cylinder 600. However, the circular spinning area 800 may still show a phenomenon of decreasing air speed and uneven air pressure inside and outside along the radial direction as the heat exchange progresses. Therefore, the present application further provides the inner blowing pipe 100 at the center of the inner blowing spinneret plate 300, so as to create a low pressure area at the center of the spinning area 800 through the air flow introduced into the inner blowing pipe 100, so as to accelerate the circulation speed of the cooling gas blown by the ring blowing cylinder 600 and realize uniform air supply along the radial direction of the spinning area.

[0054] In addition, the present application also collects the hot air after heat exchange through the air guide ring 700, and recycles the hot air after cooling through the heat exchanger 730, thereby saving energy consumption and meeting the concept of energy saving and environmental protection. The principle of the heat exchanger 730 belongs to the known technology of those skilled in the art, and will not be described in detail. However, it is worth noting that the heat exchange medium of the heat exchanger 730 can be preferably the cooling water in the water bath tank 810 commonly used in the spinning production process, so as to reduce the heat consumption of the water bath tank. Other optional conventional media (such as water, oil, etc.) can also be used.

[0055] In combination with Figure 3 , Figure 4 and Figure 5As shown, in order to further make the airflow entering the ring blowing cylinder 600 uniform, the front end of the air guide cylinder 400 is uniformly divided into a first air guide opening 410, a second air guide opening 420 and a third air guide opening 430 by a vertical partition, the air duct cavity 500 is equally divided into a fan ring-shaped first air duct cavity 510, a second air duct cavity 520 and a third air duct cavity 530 by the partition, the inner cavity of the ring blowing cylinder 600 is equally divided into a first air pressure cavity 610, a second air pressure cavity 620 and a third air pressure cavity 630 by the partition corresponding to the air duct cavity 500, and the first air guide opening 410, the first air duct cavity 510 and the first air pressure cavity 610 are communicated, the second air guide opening 420, the second air duct cavity 520 and the second air pressure cavity 620 are communicated, and the third air guide opening 430, the third air duct cavity 530 and the third air pressure cavity 630 are communicated. Thus, when the external air supply mechanism supplies air to the air guide cylinder 400, the air supply pipeline is vertically arranged, and the partition in the present application is also vertically arranged. Compared with the horizontally arranged partition, the air volume entering the first air guide opening 410, the second air guide opening 420 and the third air guide opening 430 is more uniform.

[0056] As shown in Figure 6 and Figure 7 As shown, in order to cope with the situation that the wind pressure in the spinning area 800 may still be uneven, the inside blowing pipe 100 is fan-shapedly divided into a first flow guide cavity 110, a second flow guide cavity 120 and a third flow guide cavity 130 by a partition, and corresponds to the first air pressure cavity 610, the second air pressure cavity 620 and the third air pressure cavity 630 respectively, and the inside blowing pipe 100 is provided with a temperature sensor 900 corresponding to the first flow guide cavity 110, the second flow guide cavity 120 and the third flow guide cavity 130 along the pipe body in the spinning area 800. The temperature sensor 900 is provided with three groups and uniformly corresponds to the first flow guide cavity 110, the second flow guide cavity 120 and the third flow guide cavity 130, so as to sense the real-time temperature of the position and feed back to the controller for comparison of temperature data, according to the difference of temperature data to reflect the difference of wind speed in each direction, and thus the monitoring effect of the wind pressure uniformity in the spinning area 800 is achieved.

[0057] Since the temperature controllers 900 are located adjacent to the central region and face different air pressure cavities respectively, the temperature values are bound to be less different. In order to further realize the air pressure uniformity in the center of the spinning region 800 through fine adjustment, the upper port of the inner blowing pipe 100 is provided with an adjusting assembly for adjusting the air flow into the first, second and third flow cavities 110, 120 and 130. Since the cross-sectional areas of the first, second and third flow cavities 110, 120 and 130 are the same, changing the air flow can further change the air speed values in the cavities, so as to slightly adjust the low pressure in each direction inside the inner blowing pipe 100, adjust the flow effect on the spinning region 800 in the direction, and thus realize the fine adjustment of the air pressure in the center of the spinning region 800.

[0058] As a convenient control mode, the adjusting assembly includes electromagnetic flow valves 910 respectively sealingly communicating the first, second and third flow cavities 110, 120 and 130. The cooling air input by the circulating fan 740 can be adjusted in size by the electromagnetic flow valves 910 when entering the inner blowing pipe 100, so as to realize the above fine adjustment. In addition, the electromagnetic flow valves 910, the blowing pipe 720 and the inner blowing pipe 100 are sealingly communicated, and the sealing structure belongs to the conventional technology and can be easily realized by those skilled in the art, which will not be described here.

[0059] Please refer to Figure 1 The application also provides a production method of the above high-strength polyethylene fiber melt spinning, which includes the following steps:

[0060] (1) adding polyethylene resin into a screw extruder for melt plasticization, and then extruding through a spinning assembly with an inner blowing pipe 100 and a spinneret;

[0061] (2) extruding the polyethylene melt through a ring blowing area into a water bath tank 810 to obtain a primary filament;

[0062] (3) setting a ring flow area below the ring blowing area, and connecting the ring flow area to a heat exchanger 730 through a blowing pipe 720 by a negative pressure fan 710, wherein the heat exchanger 730 is used to cool the hot air and deliver heat to the water bath tank 810;

[0063] (4) connecting the blowing pipe 720 passing through the heat exchanger 730 to a circulating fan 740, and sending the cooled hot air into the ring blowing area and the inner blowing pipe 100.

[0064] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A high-strength polyethylene fiber melt spinning energy-saving production method, characterized by, The method comprises the following steps: (1) adding polyethylene resin into a screw extruder for melting and plasticizing, and then extruding through a spinning assembly with an inner blowing pipe and a spinneret plate; (2) extruding the polyethylene melt through a ring blowing area into a water bath tank to obtain nascent filaments; (3) a ring air induction area is arranged below the ring blowing area, the ring air induction area is connected to a heat exchanger through a blowing pipe by a negative pressure fan, and the heat exchanger is used to cool the hot air and deliver heat energy to the water bath tank; (4) the blowing pipe through the heat exchanger is connected to a circulating fan, and the cooled hot air is sent into the ring blowing area and the inner blowing pipe; The production device used in the production method comprises a spinning assembly, a ring blowing assembly and a hot air circulation assembly, wherein: The spinning assembly comprises an inner blowing pipe, a spinning ring and an inner blowing spinneret plate, the inner blowing spinneret plate is a horn-shaped plate with uniform thickness, and vertical spinning holes are uniformly and densely arranged along the horizontal direction and penetrate through the inner blowing spinneret plate; the inner blowing pipe is arranged at the center hole of the inner blowing spinneret plate, and the pipe body of the inner blowing pipe is uniformly provided with air induction holes; the spinning ring surrounds the outer part of the inner blowing spinneret plate and is connected to a ring blowing cylinder; The ring blowing assembly comprises a wind guide cylinder, an air duct cavity, a ring blowing cylinder, a uniform air ring and ring blowing holes, the wind guide cylinder is connected to the blowing pipe connected to the output end of the circulating fan; the ring blowing cylinder is a hollow shell, the inner cavity of which bears wind pressure and blows air to the spinning area; the uniform air ring is correspondingly arranged at the bottom port of the ring blowing cylinder; the air duct cavity is a ring-shaped cavity coaxial with the ring blowing cylinder, and is used to connect the wind guide cylinder and the bottom port of the ring blowing cylinder; the ring blowing holes are uniformly arranged on the inner side wall of the ring blowing cylinder and connect the spinning area and the inner cavity of the ring blowing cylinder; The hot air circulation assembly comprises an air induction ring, a negative pressure fan, a blowing pipe, a heat exchanger and a circulating fan, the air induction ring is coaxial with the ring blowing cylinder and arranged below the air duct cavity, and is used to surround the spinning area, the air induction ring comprises a ring-shaped air induction port connected to the spinning area and an air induction ring shell; the air induction ring introduces the hot air in the spinning area into the heat exchanger through the blowing pipe and the negative pressure fan, and the cooled air after heat exchange is introduced into the wind guide cylinder and the inner blowing pipe through the circulating fan; The front end of the wind guide cylinder is uniformly divided into a first air guide port, a second air guide port and a third air guide port by arranging a vertical partition plate, the air duct cavity is equally divided into a first air duct cavity, a second air duct cavity and a third air duct cavity by the partition plate, the inner cavity of the ring blowing cylinder is equally divided into a first wind pressure cavity, a second wind pressure cavity and a third wind pressure cavity by the partition plate, and the first air guide port, the first air duct cavity and the first wind pressure cavity are connected, the second air guide port, the second air duct cavity and the second wind pressure cavity are connected, and the third air guide port, the third air duct cavity and the third wind pressure cavity are connected; The inner blowing pipe is fan-shapedly divided into a first induction cavity, a second induction cavity and a third induction cavity by the partition plate, and corresponds to the first wind pressure cavity, the second wind pressure cavity and the third wind pressure cavity, respectively, and the inner blowing pipe is provided with temperature sensors along the pipe body corresponding to the first induction cavity, the second induction cavity and the third induction cavity in the spinning area.

2. The energy-saving melt spinning process for high-strength polyethylene fibers according to claim 1, characterized in that, The upper port of the inner blowing pipe is provided with an adjusting assembly for adjusting the flow of gas into the first, second and third flow cavities.

3. The energy-saving production method of high-strength polyethylene fiber melt spinning according to claim 2, characterized in that, The adjusting assembly comprises electromagnetic flow valves respectively sealingly communicating with the first, second and third flow cavities.

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