Drying device and method for flat ES fiber preparation

Abstract

The invention discloses a drying device and method for flat ES fiber preparation, and relates to the technical field of fiber raw material drying treatment.The drying device comprises a vertical lifting frame, a rack is arranged on one side of the vertical lifting frame, a drying box is fixed to the top end of the rack, and a guide hopper is installed at the lower end of the drying box; a first turning plate material controller is installed on the outer wall of the side, close to the vertical material lifting frame, of the guide hopper, the outlet end of the first turning plate material controller communicates with the outer wall of the right side of the vertical material lifting frame, and an inclined material channel communicating with an inlet in the top end of the drying box is installed on the outer wall of the right side, close to the upper end, of the vertical material lifting frame. Polymer slice raw materials are continuously lifted, dispersed, sprayed, collected and recycled, so that a closed-loop continuous treatment process is formed, drying is uniform and thorough, all the polymer slice raw materials can reach and be stabilized at the extremely low water content required by the process, and the product quality is improved. And the stability of subsequent melt viscosity and excellent mouth mold spinnability are effectively ensured.

Description

Technical Field

[0001] This invention relates to the field of fiber raw material drying technology, specifically to a drying apparatus and method for preparing flat ES fibers. Background Technology

[0002] Drying flat ES fiber raw materials is a crucial step in ensuring fiber quality and production stability. Because polymer chips easily absorb moisture during storage and transportation, if they are directly introduced into the high-temperature extrusion stage without drying, the moisture will rapidly vaporize, forming vapor bubbles. This leads to uneven melt distribution and hydrolytic degradation of the molecular chains, severely impacting the fiber's mechanical properties. Therefore, a scientifically sound drying process is essential to remove moisture from the raw materials. Commonly used drying methods include hot air circulation drying and vacuum drying. The former controls appropriate temperature and humidity, using dry air to continuously remove moisture and ensure uniform drying; the latter reduces environmental pressure, achieving efficient moisture evaporation at lower temperatures and minimizing the risk of degradation in heat-sensitive materials. During the drying process, temperature, time, and airflow rate should be adjusted appropriately to ensure complete moisture removal while avoiding excessively high temperatures that could cause thermal degradation. After drying, the raw materials must be promptly sealed and stored to prevent re-absorbing moisture and contamination. As disclosed in application publication number CN117906367A, a drying device and method for preparing polyamide 6 fibers includes a drying box. The drying box has feed inlets fixedly connected to both the front and rear sides of the top center. Air inlets are arranged in a matrix on the left and right sides of the top of the drying box. A hydraulic cylinder is fixedly connected to the top of the inner cavity of the drying box, and a fixed guide rail is fixedly installed at the bottom of the output shaft of the hydraulic cylinder. By adjusting the turning assembly, when the turning shovels are adjusted to a vertical state, the material is dried using the input hot air, and the relative distance between the two turning shovels is achieved using air power. The material is automatically spread out through the action of the turning shovels. The entire process is automatic and can be carried out simultaneously with drying, avoiding the problem of material accumulation during drying in traditional devices, which affects the drying effect. However, in the above technical solution, the fiber polymer is cut... The raw materials remain gathered in the drying chamber. Polymer chips are usually in granular or flake form. During hot air circulation drying, due to gravity, the raw materials tend to settle naturally and gather at the bottom or in certain areas of the drying chamber, forming dense accumulations. When the hot air flows through the drying chamber, it first comes into contact with the top layer of raw materials. This part of the raw materials can be directly heated by the hot air and the moisture evaporates. However, the lower layer of raw materials is covered by the upper layer of raw materials, making it difficult for the hot air to penetrate directly, which hinders heat transfer and makes it difficult for moisture to escape quickly, forming a drying dead zone. When the turning component turns over, the material is violently mixed at the moment of the turning action, but during the interval between actions, the material returns to a static accumulation state. Moreover, the amount of material that can be affected and exchanged by each turning is limited. A considerable portion of the material will always remain in the core area where the airflow cannot effectively penetrate, thus failing to reach the final moisture content required by the process. Summary of the Invention

[0003] The purpose of this invention is to provide a drying apparatus and method for preparing flat ES fibers. Polymer chip raw materials are continuously fed into a drying chamber from a vertical feeding frame by a bucket-type feeding assembly and an inclined conveyor. The polymer chip raw materials are first dispersed by a double-position three-blade bulk material assembly at the top of the drying chamber. After dispersion, a hot air supply assembly sends hot airflow through a tubular ring spray assembly into the drying chamber. During the descent, the raw materials are sprayed and dried by the tubular ring spray assembly. The dried raw materials are then fed back into the vertical feeding frame through a guide hopper and a flip-plate control device, and continuously and cyclically returned to the drying chamber for further processing, thus achieving cyclic drying of the material and solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a drying apparatus for preparing flat ES fibers, comprising: A vertical material lifting frame is provided, with a frame on one side and a drying box fixed at the top of the frame. A guide hopper is installed at the lower end of the drying box. A flip-plate material controller is installed on the outer wall of the guide hopper near the vertical material lifting frame, and the outlet end of the flip-plate material controller is connected to the right outer wall of the vertical material lifting frame. An inclined material channel is installed on the upper right outer wall of the vertical material lifting frame, which is connected to the top inlet of the drying box. A bucket-type material lifting assembly is provided inside the vertical material lifting frame to feed materials into the inclined material channel. A geared motor for driving the bucket-type material lifting assembly is installed on the lower back wall of the vertical material lifting frame. A discharge valve is installed at the bottom of the guide hopper. A double-position three-lobe bulk material assembly is located at the upper part of the drying chamber. A tubular ring spray assembly is installed inside the drying chamber below the double-position three-lobe bulk material assembly. A hot air supply assembly connected to the air inlet of the tubular ring spray assembly is installed on the back wall of the drying chamber. A sprocket-type three-axis transmission assembly for power connection is installed between the bucket-type lifting assembly, the double-position three-lobe bulk material assembly, and the tubular ring spray assembly. A PLC control panel electrically connected to the input end of the geared motor, the hot air supply assembly, and the flip-plate material controller is installed on one side of the surface of the guide hopper.

[0005] Preferably, an upward-facing feed inlet is installed on the left outer wall of the vertical material lifting frame. A second flip-plate material controller is installed at the top opening of the feed inlet. A third flip-plate material controller is installed at the top of the second flip-plate material controller. A storage box is installed at the top of the third flip-plate material controller. The second, third, and first flip-plate material controllers have the same structure. The input terminals of the second and third flip-plate material controllers are electrically connected to the output terminals of the PLC control panel.

[0006] Preferably, the flip-plate material controller includes an outer material box installed between the left outer wall of the guide hopper and the right outer wall of the vertical lifting frame, an inner guide liner fixed to the right port of the outer material box, and a stepper motor installed on one side of the surface of the outer material box. The drive shaft of the stepper motor extends into the interior of the outer material box and is fixed with a gate plate. The input end of the stepper motor is electrically connected to the output end of the PLC control panel.

[0007] Preferably, the belt-type material lifting assembly includes a lower multi-wedge roller, an upper multi-wedge roller, and a multi-wedge belt installed between the lower and upper multi-wedge rollers at upper and lower positions inside the vertical material lifting frame. A plurality of scooping hoppers are installed at equal intervals on the outer wall of the multi-wedge belt. The drive shaft of the reduction motor is fixedly connected to one end of the lower multi-wedge roller. The lower multi-wedge roller transmits rotational power to the double-position three-lobe bulk material assembly and the tubular ring spray assembly through a sprocket-type three-axis transmission assembly.

[0008] Preferably, the double-position three-lobe bulk material assembly includes two rotating shafts rotatably mounted inside the drying chamber at an upper position via bearing seats, a semi-circular screen frame fixed inside the drying chamber below the two rotating shafts, and a pulley transmission structure installed between the two rotating shafts. A drive shaft is rotatably mounted on the left outer wall of the drying chamber. A bevel gear reversing transmission structure for power connection is installed between the end of the drive shaft and one of the bevel gear reversing transmission structures. One end of the drive shaft is powered through a sprocket-type three-shaft transmission assembly and a bucket-type material lifting assembly.

[0009] Preferably, the semicircular screen frame has perforated areas at the left and right positions of its bottom end, and a material blocking area is provided at the bottom end of the semicircular screen frame between the two perforated areas. The semicircular screen frame is made of stainless steel.

[0010] Preferably, the tubular ring spray assembly includes several diversion pipes rotatably mounted inside the drying chamber via bearing seats, and several nozzles mounted on the outer wall of one side of the diversion pipes. The extended line of the central axis of the diversion pipe and the extended line of the central axis of the rotating shaft are perpendicular to each other on the vertical projection plane. One end of the diversion pipe extends to the outside of the drying chamber and is equipped with a pulley. A transmission belt is fitted between several pulleys. One end of one of the diversion pipes is powered by a sprocket-type three-axis transmission assembly and a bucket-type material lifting assembly.

[0011] Preferably, the hot air supply assembly includes a hollow back frame fixed to the back of the drying oven, a plurality of heating chambers installed on the back wall of the hollow back frame, and connecting pipes installed at the lower ends of the plurality of heating chambers. Electric heating tubes are installed inside the heating chambers, and temperature sensors are installed on one inner wall of each heating chamber. A delivery pump is installed on one side of the back of the hollow back frame. The inlet of the delivery pump is connected to one end of the connecting pipe, and the outlet of the delivery pump extends into the interior of the hollow back frame through a pipe. The end of the distribution pipe away from the pulley extends into the interior of the hollow back frame. The input ends of the electric heating tubes and the delivery pump are electrically connected to the output end of the PLC control panel, and the output end of the temperature sensor is electrically connected to the input end of the PLC control panel.

[0012] Preferably, three paddle plates are fixed at equal intervals in a ring on the outer circumference of the rotating shaft.

[0013] The present invention also provides a drying method for preparing flat ES fibers, using the aforementioned drying apparatus for preparing flat ES fibers, comprising the following steps: S101: After confirming that the device is in good condition, start the device through the PLC control panel and set the hot air supply temperature of the hot air supply assembly, the speed of the geared motor, the device working time, and the opening and closing degree of the flip-plate material controller. Part of the rotational power of the geared motor is directly transmitted to the bucket-type material lifting assembly. At the same time, the sprocket-type three-axis transmission assembly also transmits another part of the rotational power of the geared motor to the double-position three-lobe bulk material assembly and the tubular ring spray assembly. At this time, the bucket-type material lifting assembly starts to continuously scoop up the wet material from the vertical material lifting frame and transport it to the inlet at the top of the drying box through the inclined material channel. The moment the material enters the drying box, the double-position three-lobe bulk material assembly at the top completely breaks up the falling slices and clumps, forming a layer of uniformly dispersed waterfall-like material curtain. S102: The tubular ring spray assembly powerfully sprays high-temperature drying hot air from multiple angles onto the entire drop curtain, ensuring that each slice is swept by high-speed airflow from all directions, and the moisture is instantly evaporated and carried away by the exhaust system. S103: The dried material falls to the bottom of the drying chamber and is collected by the guide hopper. The discharge flow rate is precisely controlled by the flip-plate material controller and finally falls back into the vertical lifting frame to complete one cycle. Then the process of lifting, dispersing, spraying, and falling back is repeated to achieve the cyclic drying of the material. S104: After the material drying is completed, the flip-plate feeder is turned off through the PLC control panel and the hot air supply assembly is stopped. The bucket-type material lifting assembly transports the last batch of material to the drying box and the guide hopper. The discharge valve is opened to transport all the high-quality dried chips with qualified moisture content to the downstream extruder hopper.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The drying device and method for preparing flat ES fibers are configured with a vertical lifting frame, a bucket-type lifting assembly, a drying box, a double-position three-lobe bulk material assembly, a hot air supply assembly, a tubular ring spray assembly, a guide hopper, a flip-plate control device, and a discharge valve, etc., which cooperate with each other. The polymer chip raw material is continuously fed into the drying box by the bucket-type lifting assembly and the inclined material channel in the vertical lifting frame. The polymer chip raw material is first dispersed by the double-position three-lobe bulk material assembly at the top of the drying box. After the raw material is dispersed, the hot air supply assembly sends the hot air flow into the drying box through the tubular ring spray assembly. During the falling process, the raw material is sprayed and swept by the tubular ring spray assembly. After drying, the raw materials are fed back into the vertical lifting frame through the guide hopper and the flip-plate control device, and continuously and cyclically sent back to the drying box for further processing. This achieves large-scale circulating drying of the materials. Instead of the polymer chips being statically piled up in the drying box waiting for hot air to pass over the surface, they are continuously lifted, dispersed, sprayed, collected, and recycled, thus forming a closed-loop continuous processing flow. The drying is uniform and thorough, and all polymer chip raw materials can reach and stabilize at the extremely low moisture content required by the process. This effectively ensures the stability of the subsequent melt viscosity and excellent die spinnability. The final ES fiber produced exhibits more consistent and reliable mechanical properties, such as strength and elongation. The polymer chips are continuously fed into the drying chamber via a bucket-type conveyor assembly and an inclined conveyor, enabling continuous feeding and recycling of the material. This continuous circulation effectively prevents static accumulation of the raw material within the drying chamber, reducing difficulties in hot air penetration and drying dead zones caused by accumulation. The continuous movement of the raw material exposes it to the hot air environment, promoting uniform moisture evaporation and significantly improving drying uniformity and efficiency. The dual-position three-blade dispersing assembly effectively disperses the polymer chips entering the drying chamber, preventing clumps or thick layers from forming at the inlet. The dispersed material is evenly distributed within the drying chamber; this "particle-level" contact efficiency is unmatched by any static tumbling drying method. This greatly increases the contact area between the raw material and the hot air, ensuring that each chip in the batch receives almost identical heat energy and drying conditions, thus guaranteeing extremely uniform moisture content in the final product and providing highly consistent raw materials for subsequent spinning. Secondly, the hot air supply assembly and the tubular ring spray assembly achieve efficient utilization of hot air by uniformly spraying hot air to all parts of the raw material during the falling process. In the traditional drying process, hot air is often concentrated in certain areas, resulting in uneven drying. The tubular ring spray design can make the hot air cover a wider space, ensuring that the raw material can be exposed to hot air throughout the entire falling path, thereby promoting the rapid evaporation and removal of moisture and improving the drying speed of the device. Finally, the combined use of the guide hopper and the flip-plate control device effectively controls the flow rate and direction of the material during the drying process, ensuring stable conveying and uniform distribution of the material in the circulation process. That is, the conveying speed of the material can be adjusted as needed to avoid the material accumulating too quickly or stagnating too slowly, further optimizing the flow state of the material and the continuity of the drying process. At the same time, the repeated exposure of the material to hot air allows the moisture to be gradually evaporated and carried away, avoiding the re-dampening phenomenon caused by insufficient drying in one go, and further ensuring the quality of raw material drying. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 .

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0018] Figure 4 This is a schematic diagram of the upper and lower isometric isometric solid structure of the present invention.

[0019] Figure 5 This is a schematic diagram of the main structure of the present invention.

[0020] Figure 6 This is a three-dimensional cross-sectional structural diagram of the present invention.

[0021] Figure 7 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 .

[0022] Figure 8 This is a three-dimensional structural diagram of the drying oven according to Embodiment 2 of the present invention.

[0023] Figure 9 This is a schematic diagram of the three-dimensional structure of the double-position three-lobe bulk material assembly according to Embodiment 2 of the present invention. Figure 1 .

[0024] Figure 10 This is a schematic diagram of the three-dimensional structure of the double-position three-lobe bulk material assembly according to Embodiment 2 of the present invention. Figure 2 .

[0025] Figure 11 This is a schematic diagram of the three-dimensional structure of the hot air supply assembly in Embodiment 3 of the present invention.

[0026] Figure 12 This is a schematic diagram of the three-dimensional structure of the tube-type annular spray assembly according to Embodiment 3 of the present invention.

[0027] In the diagram: 1. Vertical material lifting frame; 101. Inclined material channel; 102. Feed inlet; 103. Flip-plate material controller II; 104. Flip-plate material controller III; 105. Storage bin; 2. Frame; 3. Drying box; 4. Guide hopper; 5. Flip-plate material controller I; 501. Outer material bin; 502. Inner guide hopper; 503. Stepper motor; 504. Gate; 6. Discharge valve; 7. Hopper-type material lifting assembly; 701. Lower multi-wedge roller; 702. Upper multi-wedge roller; 703. Multi-wedge belt; 704. Scoop hopper; 8. Double-position three-lobe bulk material assembly; 801. Rotating shaft; 802. Pulley drive structure; 8 03. Drive shaft; 804. Bevel gear reversing transmission structure; 805. Semi-circular screen frame; 8051. Perforated screen area; 8052. Material blocking area; 806. Slurry plate; 9. Tubular ring spray assembly; 901. Diverter pipe; 902. Nozzle; 903. Pulley; 904. Drive belt; 10. Sprocket-type three-axis transmission assembly; 11. Hot air supply assembly; 1101. Hollow back frame; 1102. Conveying pump; 1103. Heating chamber; 1104. Connecting pipe; 1105. Temperature sensor; 1106. Electric heating tube; 12. PLC control panel; 13. Gear motor. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] Example 1, by Figures 1 to 7 The present invention provides a drying apparatus for preparing flat ES fibers, comprising a vertical lifting frame 1, a frame 2 disposed on one side of the vertical lifting frame 1, and a drying chamber 3 fixed to the top of the frame 2. A guide hopper 4 is installed at the lower end of the drying chamber 3. A flip-plate feeder 5 is installed on the outer wall of the guide hopper 4 near the vertical lifting frame 1, the outlet end of the flip-plate feeder 5 being connected to the right outer wall of the vertical lifting frame 1. An inclined feed channel 101, connected to the top inlet of the drying chamber 3, is installed on the upper right outer wall of the vertical lifting frame 1. The vertical lifting frame 1 is equipped with a bucket-type lifting assembly 7 that feeds materials into the inclined material channel 101. A geared motor 13 for driving the bucket-type lifting assembly 7 is installed on the lower back wall of the vertical lifting frame 1. The vertical lifting frame 1 has a compact structure and makes full use of vertical space. With the cooperation of the bucket-type lifting assembly 7, it realizes the vertical lifting and storage of raw materials. Thus, through the vertical design, the raw materials can be continuously and stably transported to the inlet of the drying box 3, avoiding material accumulation and blockage problems, and meeting the needs of large-scale repeated drying of materials.

[0030] A discharge valve 6 is installed at the bottom of the feed hopper 4, and an exhaust pipe can be installed on the back wall of the drying box 3 to allow moisture to be carried away by the external exhaust system.

[0031] The double-position three-lobe bulk material assembly 8 is located at the upper part of the drying chamber 3. The tubular ring spray assembly 9 is installed inside the drying chamber 3 below the double-position three-lobe bulk material assembly 8. A hot air supply assembly 11 connected to the air inlet of the tubular ring spray assembly 9 is installed on the back wall of the drying chamber 3. A sprocket-type three-axis transmission assembly 10 for power connection is installed between the bucket-type lifting assembly 7, the double-position three-lobe bulk material assembly 8, and the tubular ring spray assembly 9. A PLC control panel 12 is installed on one side of the surface of the guide hopper 4 and is electrically connected to the input end of the geared motor 13, the hot air supply assembly 11, and the flip-plate material controller 5.

[0032] A feed inlet 102 with an upward opening is installed on the left outer wall of the vertical feeding frame 1. A second flap feeder 103 is installed at the top opening of the feed inlet 102. A third flap feeder 104 is installed at the top of the second flap feeder 103. A storage box 105 is installed at the top of the third flap feeder 104. The second flap feeder 103, the third flap feeder 104, and the first flap feeder 105 have the same structure. The input terminals of the second flap feeder 103 and the third flap feeder 104 are electrically connected to the output terminal of the PLC control panel 12. The operator puts the polymer chip raw material to be dried into the storage box 105. The operator controls the closing state of the three-flip material controller 104 and the two-flip material controller 103 through the geared motor 13. When feeding, the operator first opens the three-flip material controller 104, so that the three-flip material controller 104 is in the normally open state. Then, the polymer chip raw material in the storage box 105 enters the three-flip material controller 104. After that, the operator controls the three-flip material controller 104 to be in the normally closed state through the PLC control panel 12, while the two-flip material controller 103 is in the normally open state. This allows the polymer chip raw material to enter the vertical lifting frame 1 through the two-flip material controller 103 and the feed port 102. At this time, the device is in a relatively closed state.

[0033] The flip-plate material controller 5 includes an outer material box 501 installed between the left outer wall of the guide hopper 4 and the right outer wall of the vertical lifting frame 1, an inner guide bladder 502 fixed to the right port of the outer material box 501, and a stepper motor 503 installed on one side of the surface of the outer material box 501. The drive shaft of the stepper motor 503 extends into the interior of the outer material box 501 and is fixed with a gate 504. The input end of the stepper motor 503 is electrically connected to the output end of the PLC control panel 12.

[0034] Taking the flip-plate material controller 5 as an example, the polymer chip raw material in the guide hopper 4 enters the inner guide hopper 502. At this time, the gate 504 presses on the outlet end of the inner guide hopper 502. The operator controls the stepper motor 503 to work through the geared motor 13. The stepper motor 503 drives the gate 504 to flip, and then the outlet end of the inner guide hopper 502 is opened. At this time, the guide hopper 4 and the vertical lifting frame 1 will be connected to realize the smooth transfer of materials.

[0035] During discharge, the staff needs to control the flap control device 5 to close, so that the polymer chip raw material is retained in the drying box 3 and the guide hopper 4. Then, the discharge valve 6 is opened to release the dried material. During this process, the guide hopper 4 has good guiding and sealing properties, ensuring that the dried raw material can flow smoothly and avoiding blockage and backflow.

[0036] The bucket-type material lifting assembly 7 includes a lower multi-wedge roller 701, an upper multi-wedge roller 702, and a multi-wedge belt 703 installed between the lower and upper multi-wedge rollers 701 and 702, which are rotatably installed at the upper and lower positions inside the vertical material lifting frame 1. Several scooping buckets 704 are installed at equal intervals on the outer wall of the multi-wedge belt 703. The drive shaft of the reduction motor 13 is fixedly connected to one end of the lower multi-wedge roller 701. The lower multi-wedge roller 701 transmits rotational power to the double-position three-lobe bulk material assembly 8 and the tubular ring spray assembly 9 through the sprocket-type three-axis transmission assembly 10.

[0037] This embodiment provides a drying method for preparing flat ES fibers, using the aforementioned drying apparatus for preparing flat ES fibers, and includes the following steps: S101: After confirming that the device is in good condition, the staff starts the device through the PLC control panel 12 and sets the hot air supply temperature of the hot air supply assembly 11, the speed of the geared motor 13, the device working time, and the opening and closing degree of the flip plate material controller 5. Part of the rotational power of the geared motor 13 is directly transmitted to the bucket-type material lifting assembly 7. At the same time, the sprocket-type three-axis transmission assembly 10 also transmits another part of the rotational power of the geared motor 13 to the double-position three-blade bulk material assembly 8 and the tubular ring spray assembly 9. At this time, the bucket-type material lifting assembly 7 starts to continuously scoop up the wet material from the vertical material lifting frame 1 and transport it to the inlet at the top of the drying box 3 through the inclined material channel 101. The moment the material enters the drying box 3, the double-position three-blade bulk material assembly 8 at the top completely breaks up the falling slices and clumps, forming a layer of evenly dispersed waterfall-like material curtain. S102: The tubular ring spray assembly 9 powerfully sprays high-temperature drying hot air from multiple angles onto the entire falling screen, ensuring that each slice is swept by high-speed airflow from all directions, and the moisture is instantly evaporated and carried away by the exhaust system. S103: The dried material falls to the bottom of the drying box 3 and is collected by the guide hopper 4. The discharge flow rate is precisely controlled by the flip-plate material controller 5, and finally falls back into the vertical lifting frame 1 to complete one cycle. Then the process of lifting, dispersing, spraying, and falling back is repeated to achieve large-scale circulating drying of the material. S104: After the material drying is completed, the staff will turn off the flap feeder 5 and stop the hot air supply assembly 11 through the PLC control panel 12. The bucket-type material lifting assembly 7 will transport the last batch of material to the drying box 3 and the guide hopper 4. The staff will open the discharge valve 6 and transport all the high-quality dried slices with qualified moisture content (which have reached extremely low and uniform moisture content) to the downstream extruder hopper.

[0038] Example 2, based on Example 1, is... Figure 8 , Figure 9 and Figure 10 The double-position three-lobe bulk material assembly 8 includes two rotating shafts 801 rotatably mounted inside the drying box 3 at an upper position via bearing seats, a semi-circular screen frame 805 fixed inside the drying box 3 below the two rotating shafts 801, and a belt drive structure 802 installed between the two rotating shafts 801. Three slurry plates 806 are fixed in a ring at equal intervals on the outer circumference of the rotating shafts 801. A drive shaft 803 is rotatably mounted on the left outer wall of the drying chamber 3. A bevel gear reversing transmission structure 804 is installed between the end of the drive shaft 803 and one of the bevel gear reversing transmission structures 804 for power connection. One end of the drive shaft 803 is powered through a sprocket-type three-axis transmission assembly 10 and a bucket-type material lifting assembly 7. When the polymer chip raw material is fed into the drying chamber 3 and received by the semi-circular screen frame 805, the drive shaft 803 receives the rotational power from the geared motor 13 through the sprocket-type three-axis transmission assembly 10. Then, the drive shaft 803 drives one of the rotating shafts 801 to rotate through the bevel gear reversing transmission structure 804, while the other rotating shaft 801 rotates synchronously in the same direction under the drive of the pulley transmission structure 802. At this time, the rotating shaft 801 continuously moves the polymer chip raw material retained in the semi-circular screen frame 805 through the slurry plate 806. The rotating paddle plate 806 disperses the raw materials into a more uniform distribution, preventing them from agglomerating and piling up. This increases the contact area between the raw materials and the hot air, promotes uniform drying, reduces drying dead zones, and improves drying efficiency and product quality. The semi-circular screen frame 805 has perforated areas 8051 at the left and right positions of the bottom end. The bottom end of the semi-circular screen frame 805 between the two perforated areas 8051 is provided with a material blocking area 8052. The semi-circular screen frame 805 is made of stainless steel. The polymer chip raw material is pushed by the slurry plate 806 and falls into the drying box 3 through the perforated areas 8051, forming a material curtain, which comes into contact with the hot airflow sprayed by the tubular ring spray assembly 9.

[0039] Example 3, based on Example 2, by Figure 11 and Figure 12 The tubular ring spray assembly 9 includes several diversion pipes 901 rotatably mounted inside the drying chamber 3 via bearing seats, and several nozzles 902 mounted on the outer wall of one side of the diversion pipes 901. The extended line of the central axis of the diversion pipes 901 and the extended line of the central axis of the rotating shaft 801 are perpendicular to each other on the vertical projection plane. One end of the diversion pipe 901 extends to the outside of the drying chamber 3 and is equipped with a pulley 903. A transmission belt 904 is fitted between several pulleys 903. One end of one of the diversion pipes 901 is powered by a sprocket-type three-axis transmission assembly 10 and a bucket-type material lifting assembly 7. High-speed airflow can enter the diversion pipe 901 and be continuously sprayed out through the nozzle 902, so that the material curtain can be sprayed and dried. During this process, the end of one of the diversion pipes 901 is powered to engage with the sprocket-type three-axis transmission assembly 10. Then, the diversion pipe 901 drives the other diversion pipes 901 to rotate together through the pulley 903 and the transmission belt 904. In this way, multiple pipes rotate together and the hot airflow is evenly sprayed into various areas in the drying box 3 and the guide hopper 4 to achieve full coverage of hot air. The spraying method of the tubular ring spray assembly 9 can effectively remove moisture from the surface of the raw materials, enhance heat exchange efficiency, and the tubular design structure is compact, which can ensure the uniformity of hot air spray and avoid local overheating. The hot air supply assembly 11 includes a hollow back frame 1101 fixed to the back of the drying oven 3, several heating chambers 1103 installed on the back wall of the hollow back frame 1101, and connecting pipes 1104 installed at the lower ends of the heating chambers 1103. Electric heating tubes 1106 are installed inside the heating chambers 1103. A temperature sensor 1105 is installed on one inner wall of one side of the heating chamber 1103. A conveying pump 1102 is installed on one side of the back of the hollow back frame 1101. The air inlet of the conveying pump 1102 is connected to one end of the connecting pipe 1104. The air outlet of the conveying pump 1102 extends into the interior of the hollow back frame 1101 through a pipe. The end of the diverter pipe 901 away from the pulley 903 extends into the interior of the hollow back frame 1101. The electric heating tubes 1106 and the conveying pipe 1104... The input terminal of pump 1102 is electrically connected to the output terminal of PLC control panel 12, and the output terminal of temperature sensor 1105 is electrically connected to the input terminal of PLC control panel 12. When the hot air supply assembly 11 is working, the operator turns on the electric heating tube 1106 and the delivery pump 1102 through PLC control panel 12. The electric heating tube 1106 continuously heats the air in the heating chamber 1103, while the delivery pump 1102 generates suction and continuously pumps the hot air into the hollow back frame 1101. The hollow back frame 1101 continuously supplies hot air to the tubular ring spray assembly 9. During this process, the temperature sensor 1105 detects the temperature in the heating chamber 1103 and feeds it back to PLC control panel 12, so as to flexibly adjust according to different raw materials and process requirements.

[0040] In this embodiment of the application, the operator first confirms that the vertical material lifting frame 1 is loaded with a sufficient amount of polymer chip raw material to be dried. Then, the operator visually inspects the sealing of each pipe and connection to ensure there is no material blockage or air leakage, and that the sprocket-type three-axis drive assembly 10, the bucket-type material lifting assembly 7, and the flip-plate material controller 5 operate smoothly without jamming. After completing the mechanical inspection, the operator powers on the device via the PLC control panel 12 to ensure the power unit operates normally. After confirming that the device is in good condition, the operator starts the device via the PLC control panel 12 and sets the hot air supply assembly 11. The hot air supply temperature, the speed of the geared motor 13, the working time of the device, and the opening and closing degree of the flapper control device 5 should be set according to specific process requirements to ensure both drying efficiency and avoid overheating or mechanical damage to the raw materials. Part of the rotational power of the geared motor 13 is directly transmitted to the bucket-type material lifting assembly 7, while the sprocket-type three-shaft transmission assembly 10 also transmits another part of the rotational power of the geared motor 13 to the double-position three-lobe bulk material assembly 8 and the tubular ring spray assembly 9. At this time, the bucket-type material lifting assembly 7 begins to continuously scoop up the wet material from the vertical material lifting frame 1 and pass it through the inclined material channel. 101 is conveyed to the inlet at the top of the drying chamber 3. The moment the material enters the drying chamber 3, the double-position three-blade bulk material assembly 8 at the top completely breaks up the falling clumps of slices, forming a uniformly dispersed waterfall-like material curtain. At the same time, the tubular ring spray assembly 9 powerfully sprays high-temperature drying hot air from multiple angles onto the entire falling material curtain, ensuring that each slice is swept by high-speed airflow from all directions. The moisture is instantly evaporated and carried away by the exhaust system. The dried material falls to the bottom of the drying chamber 3 and is collected by the guide hopper 4. The discharge flow rate is precisely controlled by the flip-plate material controller 5, and finally falls back down. The material is fed into the vertical feeding frame 1, completing one cycle. The process of feeding, dispersing, spraying, and falling back is repeated, achieving large-scale circulating drying of the material. After the material is dried, the operator closes the flapper control device 5 and stops the hot air supply assembly 11 via the PLC control panel 12. The bucket-type feeding assembly 7 transports the last batch of material to the drying box 3 and the guide hopper 4. The operator opens the discharge valve 6 and transports all the high-quality dried chips with extremely low and uniform moisture content to the downstream extruder hopper, thus providing a reliable raw material guarantee for subsequent high-quality melt spinning.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drying apparatus for preparing flat ES fibers, characterized in that, include: A vertical material lifting frame (1) is provided with a frame (2) on one side, and a drying box (3) is fixed at the top of the frame (2). A guide hopper (4) is installed at the lower end of the drying box (3). A flip-plate control device (5) is installed on the outer wall of the guide hopper (4) near the vertical material lifting frame (1). The outlet end of the flip-plate control device (5) is connected to the outer wall of the right side of the vertical material lifting frame (1). An inclined material channel (101) is installed on the upper right outer wall of the vertical lifting frame (1) and is connected to the top inlet of the drying box (3). The interior of the vertical lifting frame (1) is provided with a bucket-type lifting assembly (7) that feeds the material into the inclined material channel (101). A geared motor (13) for driving the bucket-type lifting assembly (7) is installed on the lower back wall of the vertical lifting frame (1). A discharge valve (6) is installed at the bottom of the guide hopper (4). A double-position three-lobe bulk material assembly (8) is located at the upper position inside the drying box (3). A tubular ring spray assembly (9) is installed inside the drying box (3) below the double-position three-lobe bulk material assembly (8). A hot air supply assembly (11) connected to the air inlet of the tubular ring spray assembly (9) is installed on the back wall of the drying box (3). A sprocket-type three-axis transmission assembly (10) for power connection is installed between the bucket-type material lifting assembly (7), the double-position three-lobe bulk material assembly (8), and the tubular ring spray assembly (9). A PLC control panel (12) electrically connected to the input end of the geared motor (13), the hot air supply assembly (11), and the flip-plate material controller (5) is installed on one side of the surface of the guide hopper (4).

2. The drying apparatus for preparing flat ES fibers according to claim 1, characterized in that: The vertical material lifting frame (1) has an upward-facing feed inlet (102) installed on the left outer wall. A flip-plate material controller two (103) is installed at the top opening of the feed inlet (102). A flip-plate material controller three (104) is installed at the top of the flip-plate material controller two (103). A storage box (105) is installed at the top of the flip-plate material controller three (104). The flip-plate material controller two (103), flip-plate material controller three (104), and flip-plate material controller one (5) have the same structure. The input terminals of the flip-plate material controller two (103) and flip-plate material controller three (104) are electrically connected to the output terminal of the PLC control panel (12).

3. The drying apparatus for preparing flat ES fibers according to claim 2, characterized in that: The flip-plate material controller (5) includes an outer material box (501) installed between the left outer wall of the guide hopper (4) and the right outer wall of the vertical lifting frame (1), an inner guide hopper (502) fixed at the right port of the outer material box (501), and a stepper motor (503) installed on one side of the surface of the outer material box (501). The drive shaft of the stepper motor (503) extends into the interior of the outer material box (501) and is fixed with a gate (504). The input end of the stepper motor (503) is electrically connected to the output end of the PLC control panel (12).

4. The drying apparatus for preparing flat ES fibers according to claim 1, characterized in that: The bucket-type material lifting assembly (7) includes a lower multi-wedge roller (701), an upper multi-wedge roller (702), and a multi-wedge belt (703) installed between the lower multi-wedge roller (701) and the upper multi-wedge roller (702) at the upper and lower positions inside the vertical material lifting frame (1). Several scooping buckets (704) are installed at equal intervals on the outer wall of the multi-wedge belt (703). The drive shaft of the reduction motor (13) is fixedly connected to one end of the lower multi-wedge roller (701). The lower multi-wedge roller (701) transmits rotational power to the double-position three-lobe bulk material assembly (8) and the tubular ring spray assembly (9) through the sprocket-type three-axis transmission assembly (10).

5. The drying apparatus for preparing flat ES fibers according to claim 4, characterized in that: The double-position three-lobe bulk material assembly (8) includes two rotating shafts (801) rotatably mounted on the upper part of the drying box (3) via bearing seats, a semi-circular screen frame (805) fixed inside the drying box (3) below the two rotating shafts (801), and a pulley transmission structure (802) installed between the two rotating shafts (801). A drive shaft (803) is rotatably mounted on the left outer wall of the drying box (3). A bevel gear reversing transmission structure (804) for power connection is installed between the end of the drive shaft (803) and one of the bevel gear reversing transmission structures (804). One end of the drive shaft (803) is powered through a sprocket-type three-shaft transmission assembly (10) and a bucket-type material lifting assembly (7).

6. The drying apparatus for preparing flat ES fibers according to claim 5, characterized in that: The semi-circular screen frame (805) has perforated areas (8051) at the left and right positions of the bottom end, and a baffle area (8052) is provided at the bottom end of the semi-circular screen frame (805) between the two perforated areas (8051). The semi-circular screen frame (805) is made of stainless steel.

7. The drying apparatus for preparing flat ES fibers according to claim 5, characterized in that: The tubular ring spray assembly (9) includes several diversion pipes (901) rotatably installed inside the drying chamber (3) via bearing seats and several nozzles (902) installed on the outer wall of one side of the diversion pipes (901). The extension line of the central axis of the diversion pipe (901) and the extension line of the central axis of the rotating shaft (801) are perpendicular to each other on the vertical projection plane. One end of the diversion pipe (901) extends through to the outside of the drying chamber (3) and is equipped with a pulley (903). A transmission belt (904) is fitted between several pulleys (903). One end of one of the diversion pipes (901) is powered by a sprocket-type three-axis transmission assembly (10) and a bucket-type material lifting assembly (7).

8. A drying apparatus for preparing flat ES fibers according to claim 7, characterized in that: The hot air supply assembly (11) includes a hollow back frame (1101) fixed to the back of the drying chamber (3), several heating chambers (1103) installed on the back wall of the hollow back frame (1101), and connecting pipes (1104) installed at the lower ends of the heating chambers (1103). Electric heating tubes (1106) are installed inside the heating chambers (1103). A temperature sensor (1105) is installed on one inner wall of one side of the heating chamber (1103). A delivery pump (1102) is installed on one side of the back of the hollow back frame (1101) to deliver... The air inlet of the pump (1102) is connected to one end of the connecting pipe (1104). The air outlet of the delivery pump (1102) extends through a pipe into the interior of the hollow back frame (1101). The end of the diverter pipe (901) away from the pulley (903) extends into the interior of the hollow back frame (1101). The input end of the electric heating tube (1106) and the delivery pump (1102) are electrically connected to the output end of the PLC control panel (12). The output end of the temperature sensor (1105) is electrically connected to the input end of the PLC control panel (12).

9. A drying apparatus for preparing flat ES fibers according to claim 5, characterized in that: Three paddle plates (806) are fixed in a ring at equal intervals on the outer circumference of the rotating shaft (801).

10. A drying method for preparing flat ES fibers, using the drying apparatus for preparing flat ES fibers as described in any one of claims 1-9, characterized in that: Includes the following steps: S101: Start the device through the PLC control panel (12) and set the hot air supply temperature of the hot air supply assembly (11), the speed of the geared motor (13), the working time of the device and the opening and closing degree of the flip plate control device (5). Part of the rotational power of the geared motor (13) is directly transmitted to the bucket-type lifting assembly (7). At the same time, the chain wheel type three-axis transmission assembly (10) will also transmit another part of the rotational power of the geared motor (13) to the double-position three-blade bulk material assembly (8) and the tube-type ring spray assembly (9). At this time, the bucket-type lifting assembly (7) starts to continuously scoop up the wet material from the vertical lifting frame (1) and transport it to the top entrance of the drying box (3) through the inclined material channel (101). The moment the material enters the drying box (3), the double-position three-blade bulk material assembly (8) at the top completely breaks up the falling slices and clumps, forming a layer of uniformly dispersed waterfall-like material curtain. S102: The tubular ring spray assembly (9) powerfully sprays high-temperature drying hot air from multiple angles onto the entire falling screen, ensuring that each slice is swept by high-speed airflow from all directions, and the moisture is instantly evaporated and carried away by the exhaust system. S103: The dried material falls to the bottom of the drying box (3) and is collected by the guide hopper (4). The discharge flow rate is precisely controlled by the flip plate control device (5), and finally falls back into the vertical lifting frame (1) to complete one cycle. Then the process of lifting, dispersing, spraying, and falling back is repeated to realize the cyclic drying of the material. S104: After the material drying is completed, the flip plate feeder (5) is turned off and the hot air supply assembly (11) is stopped through the PLC control panel (12). The bucket-type material lifting assembly (7) transports the last batch of material to the drying box (3) and the guide hopper (4). The discharge valve (6) is opened to transport all the high-quality dried chips with qualified moisture content to the downstream extruder hopper.

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