Chemical fiber dehydration treatment equipment and treatment method

Abstract

The present invention relates to the technical field of chemical fiber production, in particular to a chemical fiber dehydration processing device and a processing method, wherein the chemical fiber dehydration processing device comprises a processing device including a box body, a drying fan, a drying roller, a circulating air duct, a feed port and a discharge port; the present invention starts the drying fan to discharge dry hot air, and a part of the dry hot air flows into the drying roller through a steam inlet device installed at the end of the drying roller, so that the drying roller is heated and the heat is transferred to the contacting chemical fiber, thereby accelerating the evaporation of water on the chemical fiber, and the effect of the limiting groove makes the chemical fiber part located on the drying roller be in the semi-enclosed area of ​​the limiting groove, and the heat emitted from the inner wall of the limiting groove makes the outer surface of the chemical fiber evenly heated from multiple circumferential angles, so that the heating evaporation effect of the water on the chemical fiber is more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of chemical fiber production, in particular to a chemical fiber dehydration treatment device and a treatment method. Background Art

[0002] Chemical fiber is a fiber with textile properties made from natural or synthetic polymer compounds, through the processes of preparing spinning solution, spinning and post-processing; carbon fiber is known as the king of dual-use materials: compared with metal materials such as titanium, steel, and aluminum, it has the advantages of high strength, high modulus, low density, and small linear expansion coefficient in physical properties. It is widely used in military fields such as aircraft manufacturing, industrial fields such as wind power blades, and sports and leisure fields such as GOLF bats. The quality of chemical fiber depends to a large extent on the degree of tissue densification during the preparation process, and tissue densification depends on the degree of drying and dehydration of the prepared chemical fiber during the preparation process.

[0003] In the drying and dehydration process, the dryer uses steam to heat the drying roller, and then dries the chemical fiber wrapped on the drying roller, so that the chemical fiber is slowly densified inside the dryer, which can effectively reduce the water content of the chemical fiber and prevent the appearance of skin-core structure and twining between monofilaments; but at the same time, when the chemical fiber is wound on the drying roller, there is a temperature difference between the part of the chemical fiber that contacts the drying roller and other parts, which will cause a difference in the degree of dehydration; and when the chemical fiber is just wound on the drying roller, because of the internal stress of the chemical fiber during the preparation process, when the drying roller rotates, it may not be able to rotate synchronously with the drying roller, causing slippage between the drying roller and the chemical fiber, so that the relative friction between the chemical fiber and the tightly fitted outer surface of the drying roller during polishing may cause scratches, affecting the surface quality of the chemical fiber.

[0004] In view of this, the present invention proposes a chemical fiber dehydration treatment device and a treatment method to solve the above problems. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, the present invention proposes a chemical fiber dehydration treatment device and a treatment method.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a chemical fiber dehydration treatment method, the treatment method comprising the following steps:

[0007] S1: The chemical fiber to be dried is inserted through the gap between the limiting rollers at the feed port of the dehydration treatment equipment, first bypasses the drying roller near the bottom, then extends to bypass the adjacent drying roller near the top, bypasses the drying rollers staggered above and below, and finally is pulled out from the gap between the limiting rollers at the discharge port and wound on the winding device on the corresponding production line;

[0008] S2: Start the motor connected to the drying roller, the drying roller rotates at a low speed, and drives the entangled chemical fibers to move at a low speed. In this process, the drying fan is started to discharge dry hot air, and the dry hot air flows into the drying roller through the steam inlet device installed at the end of the drying roller, so that the drying roller is heated and the chemical fibers are dried and dehydrated;

[0009] S3: After drying, the chemical fibers are tested for humidity. The qualified chemical fibers are processed to the next step. The chemical fibers with humidity higher than the qualified standard need to be repeatedly dried and dehydrated.

[0010] A chemical fiber dehydration treatment device, the treatment device is suitable for the above-mentioned chemical fiber dehydration treatment method, the treatment device comprises a box body, a drying fan, a drying roller, a circulating air duct, a feed port and a discharge port;

[0011] A drying fan is installed on one side of the box body, and the drying fan is used to provide dry hot air for the box body;

[0012] The drying rollers are evenly installed on the side walls of the box, and the drying rollers are staggered downward;

[0013] The circulating air duct is arranged on the box body and cooperates with the drying fan to realize the circulating flow of the drying hot air;

[0014] An air outlet is provided at a portion of the side wall of the circulating air duct close to the top of the box body, an air inlet is provided at a portion of the side wall of the circulating air duct opposite to the air outlet, and a return duct is provided at the top of the circulating air duct to communicate with the drying fan to realize hot air circulation;

[0015] The feed inlet and the discharge outlet are respectively arranged on opposite side walls of the box body, and both the feed inlet and the discharge outlet are equipped with limiting rollers;

[0016] The drying roller is evenly provided with annular limiting grooves, and the side walls of the limiting grooves are communicated with the interior of the drying roller, and are used for drying the chemical fibers located in the limiting grooves at multiple angles.

[0017] Preferably, the cross section of the limiting groove is an arc, and the joint between the side wall of the limiting groove and the upper surface of the drying roller is transitioned through a rounded corner.

[0018] Preferably, a drying chamber is provided inside the drying roller, and the length of the drying chamber is greater than the maximum distance between the limiting grooves;

[0019] An annular convex block is provided at a position inside the drying chamber corresponding to the limiting groove. The outer surface of the annular convex block is arc-shaped, and ventilation holes are evenly arranged on the annular convex block. One end of the ventilation hole is connected to the inside of the drying chamber, and the other end is connected to the inside of the limiting groove.

[0020] Preferably, the vent holes are distributed in a ring shape around the center of the circle corresponding to the arc on the inner surface of the limiting groove, and the extension lines of the center lines of the vent holes intersect at the center of the circle corresponding to the arc on the inner surface of the limiting groove.

[0021] Preferably, the diameter of the vent hole is inversely proportional to the distance to the center of the drying chamber.

[0022] Preferably, the drying roller is cantilevered, and a directional module is provided at a portion of the side wall of the box body opposite to the end of the drying roller, for achieving directional flow of evenly distributed vents;

[0023] The orientation module comprises:

[0024] A support rod, one end of which is fixedly mounted on the side wall of the box body at a position opposite to the center point of the end of the drying roller, and the other end of which passes through the end of the drying roller and extends into the interior of the drying chamber;

[0025] The air blocking hood is annular and contacts the outer surface of the annular protrusion. A notch is provided on the air blocking hood, and the inner ring surface of the air blocking hood is connected to the support rod through a connecting rod.

[0026] Preferably, the edges on both sides of the air blocking cover are raised and embedded in the annular fixing grooves provided at the corresponding positions of the annular protrusions.

[0027] Preferably, balls are evenly arranged on the raised ends of both side edges of the air blocking cover.

[0028] Preferably, the air blocking hood is obtained by sequentially splicing a plurality of arc-shaped hood components, and adjacent hood components are connected by bolts.

[0029] The beneficial effects of the present invention are as follows:

[0030] 1. A chemical fiber dehydration processing equipment and processing method described in the present invention starts a drying fan to discharge dry hot air, and a part of the dry hot air flows into the drying roller through a steam inlet device installed at the end of the drying roller, so that the drying roller is heated and the heat is transferred to the contacting chemical fiber, thereby accelerating the evaporation of water on the chemical fiber. In addition, the limiting groove acts so that the chemical fiber part located on the drying roller is in the semi-enclosed area of ​​the limiting groove. The heat emitted from the inner wall of the limiting groove causes the outer surface of the chemical fiber to be evenly heated from multiple circumferential angles, so that the heating and evaporation of water on the chemical fiber is more uniform.

[0031] 2. The chemical fiber dehydration treatment equipment and treatment method described in the present invention, by setting the internal shape of the limiting groove, the cross section of the limiting groove is formed into an excellent arc, and the junction between the side wall of the limiting groove and the upper surface of the drying roller is transitioned through a rounded corner. In this way, in the process of placing the chemical fiber, the chemical fiber is limited in the limiting groove by the excellent round and smooth outer surface of the limiting groove, ensuring that more than half of the outer surface of the chemical fiber part located in the limiting groove is surrounded by the side wall of the limiting groove, and is evenly subjected to the heat transmitted by the side wall of the limiting groove, so that the moisture on the chemical fiber is further evaporated. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Figure 1 It is a method flow chart of the chemical fiber dehydration treatment method of the present invention;

[0034] Figure 2 is a three-dimensional diagram of the dehydration treatment equipment in the present invention;

[0035] Figure 3 is a cross-sectional view of the dehydration treatment equipment of the present invention;

[0036] Figure 4 is a cross-sectional view of the dehydration treatment equipment of the present invention from another angle;

[0037] Figure 5 yes Figure 4 A partial enlarged view of the middle A;

[0038] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle;

[0039] Figure 7 It is a three-dimensional diagram of the air blocking cover in the dehydration treatment equipment of the present invention;

[0040] In the figure: box body 1, feed port 11, discharge port 12, drying fan 2, drying roller 3, limit groove 31, drying chamber 32, annular protrusion 33, annular fixing groove 331, air vent 34, circulating air duct 4, air outlet 41, air inlet 42, return duct 43, directional module 5, support rod 51, air blocking hood 52, and cover part 521. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0042] like Figures 1 to 7 As shown, the chemical fiber dehydration treatment method of the present invention comprises the following steps:

[0043] S1: insert the chemical fiber to be dried through the gap between the limiting rollers at the feed port 11 of the dehydration treatment equipment, first bypass the drying roller 3 near the bottom, then extend to bypass the adjacent drying roller 3 near the top, bypass the drying rollers 3 staggered above and below, and finally pull out from the gap between the limiting rollers at the discharge port 12 and wind on the winding device on the corresponding production line;

[0044] S2: Start the motor connected to the drying roller 3, the drying roller 3 rotates at a low speed, and drives the entangled chemical fibers to move at a low speed. In this process, the drying fan 2 is started to discharge dry hot air, and the dry hot air flows into the drying roller 3 through the steam inlet device installed at the end of the drying roller 3, so that the drying roller 3 is heated and the chemical fibers are dried and dehydrated;

[0045] S3: After drying, the chemical fibers are tested for humidity. The qualified chemical fibers are processed to the next step. The chemical fibers with humidity higher than the qualified standard need to be repeatedly dried and dehydrated.

[0046] A chemical fiber dehydration processing equipment, the processing equipment is suitable for the above-mentioned chemical fiber dehydration processing method, the processing equipment comprises a box body 1, a drying fan 2, a drying roller 3, a circulating air duct 4, a feed port 11 and a discharge port 12; a drying fan 2 is installed on one side of the box body 1, and the drying fan 2 is used to provide dry hot air for the box body 1; the drying roller 3 is evenly installed on the side wall of the box body 1, and the drying roller 3 here adopts the drying roller 3 structure used for drying fibers in the prior art, which is a cantilever type, and the inside of the roller from which the drying roller 3 extends is hollow, and the part where the drying roller 3 is combined with the side wall of the box body 1 is provided with a reduction motor and a steam inlet device, which is communicated with the drying fan 2, and high-temperature steam is passed into the drying roller 3 for circulation, so as to achieve drying The rollers 3 are heated; and the drying rollers 3 are staggered in an upper and lower arrangement; the circulating air duct 4 is arranged in the inner wall of the box body 1, and an air outlet 41 is provided at a position near the top of the inner wall of the box body 1, and an air inlet 42 is provided at a position near the bottom, and the air inlet 42 and the air outlet 41 are both communicated with the interior of the box body 1, and a dehumidifier is installed in the circulating air duct 4; in conjunction with the drying fan 2, a circulating flow of dry hot air is realized; the feed port 11 and the discharge port 12 are respectively arranged on the opposite side walls of the box body 1, and limiting rollers are installed on the feed port 11 and the discharge port 12; annular limiting grooves 31 are evenly provided on the drying roller 3, and the side walls of the limiting grooves 31 are communicated with the interior of the drying roller 3, so as to perform multi-angle drying on the chemical fiber located in the limiting grooves 31.

[0047] During operation, the chemical fiber to be dried is inserted through the gap between the limiting rollers at the feed port 11, first bypasses the drying roller 3 near the bottom, and then extends to bypass the adjacent drying roller 3 near the top, and pays attention to ensuring that the chemical fiber is embedded in the corresponding limiting groove 31 on the drying roller 3, and repeats this process, bypasses the drying rollers 3 staggered above and below, and finally is pulled out from the gap between the limiting rollers at the discharge port 12 and wound on the winding device on the corresponding production line; the motor connected to the drying roller 3 is started, the drying roller 3 rotates at a low speed, and drives the wound chemical fiber to move at a low speed. In this process, the drying roller 3 is started. The dynamic drying fan 2 flows out drying hot air, and a part of the drying hot air flows into the drying roller 3 through the steam inlet device installed at the end of the drying roller 3, so that the drying roller 3 is heated and the heat is transferred to the chemical fiber in contact, accelerating the evaporation of water on the chemical fiber. In addition, the limiting groove 31 makes the chemical fiber part on the drying roller 3 be in the semi-enclosed area of ​​the limiting groove 31. The heat emitted from the inner wall of the limiting groove 31 makes the outer surface of the chemical fiber evenly heated from multiple circumferential angles, so that the heating and evaporation of water on the chemical fiber is more uniform.

[0048] Another part of the dry hot air flows into the circulating air duct 4, and flows downward from the air outlet 41, and after acting on the chemical fiber part located in the gap between the drying rollers 3, it continues to flow downward from the air inlet 42 located at the bottom, and flows upward along the circulating air duct 4 located on both sides of the interior of the box body 1, and finally enters the drying fan 2 along the return pipe 43 to be heated and dried again to form dry hot air, thus realizing the recycling of dry hot air; and the circulating air duct 4 is mainly located in the side wall of the box body 1. During the flow process, because the side of the side wall of the circulating air duct 4 close to the interior of the box body 1 is made of metal heat-conducting material, and the side away from the interior of the box body 1 is made of resin heat-insulating material, the dry hot air transfers heat to the interior of the box body 1 through the side wall during the flow process, so that the interior of the box body 1 is evenly heated , the temperature rises, and the utilization rate of the heat in the drying hot air is also improved; in order to ensure that the drying hot air circulates along a stable motion trajectory, a guide fan is installed at the air inlet 42, which is controlled by an external controller. After startup, the dry airflow inside the box 1 is accelerated and drawn into the air inlet 42, and flows along the circulating air duct 4, thereby increasing the air flow rate inside the box 1, and further accelerating the evaporation of water in the chemical fiber inside the box 1. The chemical fiber is limited by the limiting groove 31 during movement, and the problem of chemical fiber slipping on the drying roller 3 or even entanglement with each other is avoided under the impact of the air with a larger flow rate; finally, the fully dried chemical fiber goes out from the discharge port 12, is recovered on the ticket collecting equipment, and is ready for the next step of processing.

[0049] Furthermore, by setting the internal shape of the limiting groove 31, the cross section of the limiting groove 31 is formed into an excellent circular arc, and the junction between the side wall of the limiting groove 31 and the upper surface of the drying roller 3 is transitioned through a rounded corner. In this way, during the placement of the chemical fiber, the chemical fiber is limited by the outer surface of the perfectly rounded and smooth limiting groove 31 in the limiting groove 31, ensuring that more than half of the outer surface of the chemical fiber part located in the limiting groove 31 is surrounded by the side wall of the limiting groove 31, and is evenly subjected to the heat transferred by the side wall of the limiting groove 31, so that the moisture on the chemical fiber is further evaporated; when the chemical fiber is embedded in and leaves the limiting groove 31, because the junction surface of the side wall of the limiting groove 31 and the upper surface of the drying roller 3 are both rounded, even if the outer surface of the chemical fiber collides when entering the side wall of the limiting groove 31, it will not cause serious scratches on the outer surface of the chemical fiber.

[0050] Furthermore, a drying chamber 32 is provided inside the drying roller 3, and the length of the drying chamber 32 is greater than the maximum spacing between the limiting grooves 31; an annular protrusion 33 is provided at a position corresponding to the limiting groove 31 inside the drying chamber 32, and the outer surface of the annular protrusion 33 is in an arc shape, and vents 34 are evenly provided on the annular protrusion 33, one end of the vents 34 is connected to the inside of the drying chamber 32, and the other end is connected to the inside of the limiting groove 31. The vents 34 are distributed in an annular shape around the center of the circle corresponding to the arc on the inner surface of the limiting groove 31, and the extension of the center line of the vents 34 intersects with the center of the circle corresponding to the arc on the inner surface of the limiting groove 31.

[0051] After entering the drying chamber 32, the drying hot air heats the side wall of the drying roller 3 from the inside to the outside. In this process, the drying hot air is in full contact with the annular protrusion 33, and the heat is transferred to the side wall of the limiting groove 31 through the annular protrusion 33, and then to the outer surface of the chemical fiber. In this way, the heat distribution is more uniform, which accelerates the evaporation of water on the chemical fiber. A part of the drying hot air flows out through the annularly distributed vents 34 and evenly impacts the surface of the chemical fiber. On the one hand, it further accelerates the outflow of water on the surface of the chemical fiber and accelerates the dehydration of the chemical fiber. On the other hand, because the movement of the chemical fiber on the drying roller 3 is The tightness is unevenly distributed, and slippage often occurs. Friction and scratches may occur between the outer surface of the chemical fiber and the outer surface of the drying roller 3 in contact therewith. The impact force of the dry hot air flowing out of the annularly distributed air holes 34 on the chemical fiber is balanced, so that the chemical fiber is limited and moves along a stable motion trajectory. After the dry hot air flows out, it fills the gap between the outer surface of the chemical fiber and the limiting groove 31, which lubricates the moving chemical fiber, reduces the wear of the outer surface of the limiting groove 31 on the outer surface of the chemical fiber, and prevents the outer surface of the chemical fiber from being scratched during movement.

[0052] Furthermore, the diameter of the vent hole 34 is inversely proportional to the distance to the center of the drying chamber 32. Because the part of the limiting groove 31 closest to the middle of the drying roller 3 is in closer contact with the chemical fiber, the diameter of the vent hole 34 here is the largest, so the airflow intensity of the hot dry air flowing out is also the largest, so that the corresponding chemical fiber is supported, the chemical fiber is lifted by the airflow, and the gap between the outer surface of the chemical fiber and the inner wall of the limiting groove 31 is increased, further reducing the friction resistance between the chemical fiber and the side wall of the limiting groove 31, and reducing the possible scratches on the chemical fiber.

[0053] As described above, the drying roller 3 is cantilevered, and a directional module 5 is provided at a portion of the side wall of the box body 1 opposite to the end of the drying roller 3, for realizing directional flow of evenly distributed air vents 34; specifically, the directional module 5 includes: a support rod 51, one end of the support rod 51 is fixedly mounted on a portion of the side wall of the box body 1 opposite to the center point of the end of the drying roller 3, and the other end passes through the end of the drying roller 3 and extends into the interior of the drying chamber 32; an air blocking hood 52, the air blocking hood 52 is annular and contacts with the outer surface of the annular protrusion 33, a notch is provided on the air blocking hood 52, and the inner ring surface of the air blocking hood 52 is connected to the support rod 51 through a connecting rod.

[0054] Furthermore, because among the evenly distributed air holes 34, only the dry hot air released from the part corresponding to the chemical fiber can effectively act on the surface of the chemical fiber, and only a part of the annular limiting groove 31 is embedded with the chemical fiber, the dry hot air flowing out of the other parts is not effectively utilized; therefore, an air blocking hood 52 is provided to block the air holes 34 on the annular protrusion 33, and the notched portion corresponds to the portion on the limiting groove 31 where the chemical fiber is embedded. In this way, when the drying roller 3 rotates and the limiting groove 31 rotates, the air blocking hood 52 is kept fixed by the connected support rod 51, and the notched portion always corresponds to the portion on the limiting groove 31 where the chemical fiber is embedded, so that the dry hot air is limited to flow out only through the notched portion and act on the corresponding chemical fiber portion, thereby further improving the utilization rate of the dry hot air.

[0055] Further, the edges of the air blocking cover 52 on both sides are raised and embedded in the annular fixing groove 331 provided at the corresponding part of the annular protrusion 33; the ends of the raised edges of the air blocking cover 52 on both sides are evenly provided with balls; the air blocking cover 52 is obtained by sequentially splicing multiple arc-shaped cover parts 521, and the adjacent cover parts 521 are connected by bolts. By making the edge protrusions on both sides of the air blocking cover 52 embedded in the annular fixing groove 331 and rotating along the fixing groove, the parts of the air blocking cover 52 other than the edge protrusions do not contact the surface of the annular protrusion 33, thus reducing the contact surface between the air blocking cover 52 and the annular protrusion 33, and further reducing the wear of the air blocking cover 52; and the air blocking cover 52 is provided with a sealing block near the notch to prevent the dry hot air from flowing in through the gap between the air blocking cover 52 and the annular protrusion 33 at the notch, causing the utilization rate of the dry hot air to decrease; and the air blocking cover 52 is obtained by sequentially splicing multiple arc-shaped cover parts 521, so that the operator can adjust the notch size according to the actual situation, thereby improving the flexibility of use.

[0056] The specific workflow is as follows:

[0057] During operation, the chemical fiber to be dried is inserted through the gap between the limiting rollers at the feed port 11, first bypasses the drying roller 3 near the bottom, and then extends to bypass the adjacent drying roller 3 near the top, and pays attention to ensuring that the chemical fiber is embedded in the corresponding limiting groove 31 on the drying roller 3, and repeats this process, bypasses the drying rollers 3 staggered above and below, and finally is pulled out from the gap between the limiting rollers at the discharge port 12 and wound on the winding device on the corresponding production line; the motor connected to the drying roller 3 is started, the drying roller 3 rotates at a low speed, and drives the wound chemical fiber to move at a low speed. In this process, the drying roller 3 is started. The dynamic drying fan 2 flows out drying hot air, and a part of the drying hot air flows into the drying roller 3 through the steam inlet device installed at the end of the drying roller 3, so that the drying roller 3 is heated and the heat is transferred to the chemical fiber in contact, accelerating the evaporation of water on the chemical fiber. In addition, the limiting groove 31 makes the chemical fiber part on the drying roller 3 be in the semi-enclosed area of ​​the limiting groove 31. The heat emitted from the inner wall of the limiting groove 31 makes the outer surface of the chemical fiber evenly heated from multiple circumferential angles, so that the heating and evaporation of water on the chemical fiber is more uniform.

[0058] Another part of the dry hot air flows into the circulating air duct 4, and flows downward from the air outlet 41, and after acting on the chemical fiber part located in the gap between the drying rollers 3, it continues to flow downward from the air inlet 42 located at the bottom, and flows upward along the circulating air duct 4 located on both sides of the interior of the box body 1, and finally enters the drying fan 2 along the return pipe 43 to be heated and dried again to form dry hot air, thus realizing the recycling of dry hot air; and the circulating air duct 4 is mainly located in the side wall of the box body 1. During the flow process, because the side of the side wall of the circulating air duct 4 close to the interior of the box body 1 is made of metal heat-conducting material, and the side away from the interior of the box body 1 is made of resin heat-insulating material, the dry hot air transfers heat to the interior of the box body 1 through the side wall during the flow process, so that the interior of the box body 1 is evenly heated , the temperature rises, and the utilization rate of the heat in the drying hot air is also improved; in order to ensure that the drying hot air circulates along a stable motion trajectory, a guide fan is installed at the air inlet 42, which is controlled by an external controller. After startup, the dry airflow inside the box 1 is accelerated and drawn into the air inlet 42, and flows along the circulating air duct 4, thereby increasing the air flow rate inside the box 1, and further accelerating the evaporation of water in the chemical fiber inside the box 1. The chemical fiber is limited by the limiting groove 31 during movement, and the problem of chemical fiber slipping on the drying roller 3 or even entanglement with each other is avoided under the impact of the air with a larger flow rate; finally, the fully dried chemical fiber goes out from the discharge port 12, is recovered on the ticket collecting equipment, and is ready for the next step of processing.

Claims

1. A method for dehydrating chemical fibers, characterized in that: The processing method comprises the following steps: S1: The chemical fiber to be dried is inserted through the gap between the limiting rollers at the feed port (11) of the dehydration treatment equipment, first bypasses the drying roller (3) near the bottom, then extends to bypass the adjacent drying roller (3) near the top, bypasses the drying rollers (3) staggered above and below, and finally is pulled out from the gap between the limiting rollers at the discharge port (12) and wound on the winding device on the corresponding production line; S2: starting the motor connected to the drying roller (3), so that the drying roller (3) rotates at a low speed and drives the entangled chemical fibers to move at a low speed. During this process, the drying fan (2) is started to discharge dry hot air, and the dry hot air flows into the drying roller (3) through the steam inlet device installed at the end of the drying roller (3), so that the drying roller (3) is heated and the chemical fibers are dried and dehydrated; S3: After drying, the chemical fibers are tested for humidity. The qualified chemical fibers are processed to the next step. The chemical fibers with humidity higher than the qualified standard need to be repeatedly dried and dehydrated. The processing equipment comprises a box body (1), a drying fan (2), a drying roller (3), a circulating air duct (4), a feed port (11) and a discharge port (12); A drying fan (2) is installed on one side of the box body (1), and the drying fan (2) is used to provide dry hot air for the box body (1); The drying rollers (3) are evenly mounted on the side walls of the box body (1), and the drying rollers (3) are staggered downwardly; The circulating air duct (4) is arranged on the box body (1) and cooperates with the drying fan (2) to realize the circulating flow of the drying hot air; An air outlet (41) is provided at a portion of the side wall of the circulating air duct (4) close to the top of the box body (1), an air inlet (42) is provided at a portion of the side wall of the circulating air duct (4) opposite to the air outlet (41), and a return duct (43) is provided at the top of the circulating air duct (4) to communicate with the drying fan (2) so as to realize hot air circulation; The feed inlet (11) and the discharge outlet (12) are respectively arranged on opposite side walls of the box body (1), and both the feed inlet (11) and the discharge outlet (12) are equipped with limiting rollers; The invention is characterized in that: the drying roller (3) is evenly provided with annular limiting grooves (31), the side walls of the limiting grooves (31) are communicated with the interior of the drying roller (3), and are used to dry the chemical fibers located in the limiting grooves (31) at multiple angles; The cross section of the limiting groove (31) forms an arc, and the junction between the side wall of the limiting groove (31) and the upper surface of the drying roller (3) is transitioned through a rounded corner; A drying chamber (32) is provided inside the drying roller (3), and the length of the drying chamber (32) is greater than the maximum distance between the limiting grooves (31); An annular protrusion (33) is provided at a position inside the drying chamber (32) corresponding to the limiting groove (31); the outer surface of the annular protrusion (33) is arc-shaped, and ventilation holes (34) are evenly arranged on the annular protrusion (33); one end of the ventilation hole (34) is communicated with the inside of the drying chamber (32), and the other end is communicated with the inside of the limiting groove (31); The vent holes (34) are distributed in a ring shape around the center of the circle corresponding to the arc on the inner surface of the limiting groove (31), and the extension line of the center line of the vent holes (34) intersects with the center of the circle corresponding to the arc on the inner surface of the limiting groove (31); The diameter of the vent hole (34) is inversely proportional to the distance to the center of the drying chamber (32); The drying roller (3) is cantilevered, and a directional module (5) is provided at a position of the side wall of the box body (1) opposite to the end of the drying roller (3) for achieving directional flow of evenly distributed ventilation holes (34); The orientation module (5) comprises: A support rod (51), one end of the support rod (51) being fixedly mounted on a side wall of the housing (1) at a position opposite to the center point of the end of the drying roller (3), and the other end of the support rod (51) passing through the end of the drying roller (3) and extending into the interior of the drying chamber (32); A gas blocking cover (52), the gas blocking cover (52) is annular and contacts the outer surface of the annular protrusion (33), a notch is provided on the gas blocking cover (52), and the inner surface of the gas blocking cover (52) is connected to the support rod (51) via a connecting rod; The edges of both sides of the air blocking cover (52) are raised and embedded in the annular fixing groove (331) provided at the corresponding position of the annular protrusion (33); Ball bearings are evenly arranged at the raised ends of both sides of the air blocking cover (52); The air blocking cover (52) is obtained by sequentially splicing a plurality of arc-shaped cover parts (521), and adjacent cover parts (521) are connected by bolts; After entering the drying chamber (32), the drying hot air heats the side wall of the drying roller (3) from the inside to the outside. During this process, the drying hot air fully contacts the annular protrusion (33), and the heat is transferred to the side wall of the limiting groove (31) through the annular protrusion (33), and then to the outer surface of the chemical fiber. In this way, the heat distribution is more uniform, which accelerates the evaporation of water on the chemical fiber. A part of the drying hot air flows out through the annularly distributed vents (34) and evenly impacts the surface of the chemical fiber. On the one hand, it further accelerates the outflow of water on the surface of the chemical fiber and accelerates the dehydration of the chemical fiber. On the other hand, because the chemical fiber moves on the drying roller (3), the chemical fiber is dehydrated. Due to the uneven distribution of tightness, slippage often occurs, and friction scratches may occur between the outer surface of the chemical fiber and the outer surface of the drying roller (3) in contact. The impact force of the dry hot air flowing out of the annularly distributed vents (34) on the chemical fiber is balanced, so that the chemical fiber is limited and moves along a stable motion trajectory. After the dry hot air flows out, it fills the gap between the outer surface of the chemical fiber and the limiting groove (31), which has a lubricating effect on the moving chemical fiber, reduces the wear of the outer surface of the limiting groove (31) on the outer surface of the chemical fiber, and prevents the outer surface of the chemical fiber from being scratched during movement.

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