Polyester chip drying device

Abstract

The invention relates to the technical field of drying devices, in particular to a polyester chip drying device which comprises a shell, material distribution assemblies and stirring parts, a feeding cavity and a plurality of drying cavities are formed in the shell, the feeding cavity and the drying cavities are separated through the material distribution assemblies, every two adjacent drying cavities are separated through the material distribution assemblies, and the stirring parts are arranged in the shell. Each material distribution assembly is provided with a channel for hot air to pass through, each material distribution assembly distributes materials to be dried into the adjacent drying cavities below and forms a material column, and a stirring piece for stirring the material column is arranged in each material column. The to-be-dried materials are dried in different areas, the accumulation degree of polyester chips is reduced, the polyester chips can be stirred, relative movement of the polyester chips is achieved, the problem that the areas are inconsistent in the hot air drying process is avoided, the more uniform drying effect is achieved, and the lower water content is achieved; and an existing filling type drying tower can be replaced, and a better and more uniform drying effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of drying devices, and in particular to a polyester chip drying device. Background Art

[0002] When the fiber products workshop was established, in order to ensure good drying effect and smooth process flow, vertical drying equipment, namely filled drying tower, was basically used. The filled drying tower is filled with chips in the drying chamber, and the polyester chips slowly descend from the upper end of the drying chamber. The dry hot air contacts the polyester chips from bottom to top and takes away its moisture to achieve the purpose of drying. The equipment has a simple structure, a large processing capacity, and is directly connected to the extruder to avoid contact between the dried polyester chips and the air. It is currently the most widely used drying equipment.

[0003] However, the filled drying tower also has certain shortcomings, because the filled drying tower cannot achieve sufficient and uniform drying during the drying process. The polyester chips are prone to form parts with different densities during stacking. These parts with different densities will cause different airflow rates, so the degree of drying is also different. It is also easy to cause arching problems due to excessive stacking and high backlog pressure. Therefore, there is an urgent need for a polyester chip drying equipment that can achieve better drying effects and can replace the filled drying tower. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a polyester chip drying device, which is used to replace the existing filled drying tower to achieve better and more uniform drying effect.

[0005] In order to solve this technical problem, the technical solution adopted in this application is: A polyester chip drying device comprises a shell, a cloth assembly and a stirring member, wherein a feed chamber and a plurality of drying chambers are arranged in the shell, the feed chamber and the drying chamber, and two adjacent drying chambers are separated by the cloth assembly, each of the cloth assemblies is provided with a channel for passing hot air, each of the cloth assemblies distributes the material to be dried into the adjacent drying chamber below and piles it up to form a material column of a certain height, and each of the material columns is provided with a stirring member for stirring the material column.

[0006] The above technical scheme dries the material to be dried in different areas, and gradually reduces the stacking degree of the polyester chips in a progressive drying state, which not only reduces the stacking height, but also avoids the formation of parts with different densities in the lower layer of the material to be dried during the stacking process, and avoids the problem of inconsistent hot air drying process in these areas. In addition, due to the action of the stirring member, the polyester chips can be stirred to achieve relative movement between the polyester chips, and reduce the occurrence of problems such as arching, bridging, and rat holes. On the one hand, it can achieve a more uniform drying effect and achieve a lower water content. On the other hand, compared with the filled drying tower in the prior art, it can also make the polyester chips have a consistent residence time in the shell, avoiding some places from being dried for a long time due to arching and bridging problems, and some places from not being dried for a long time due to central flow problems. Therefore, the above technical scheme of the present invention can achieve better and more uniform drying effect.

[0007] As an overall concept of the present invention, the above scheme has multiple implementation methods, for example, using a motor to drive the existing rotating cloth distribution device; or setting multiple valves on the cloth distribution component and using a control mechanism to control their opening and closing, as well as other technical solutions of the present invention, can achieve uniform distribution of materials downward.

[0008] Furthermore, the cloth assembly includes a cloth plate and a positioning plate, the positioning plate is fixedly connected to the shell, the positioning plate is arrayed with through holes for unloading, a cloth plate is provided under the positioning plate, the cloth plate is evenly distributed with ventilation holes for passing hot air, a discharge hole is provided on the cloth plate, the discharge hole is consistent in shape and size with the through hole on the positioning plate, the cloth plate and the positioning plate are coaxial and relatively rotatable, and the discharge hole is opposite to any through hole up and down when the cloth plate rotates.

[0009] The above technical scheme specifically discloses the structure of the cloth assembly of the present invention. The positioning plate separates the material column formed by the polyester chips from the cloth plate. The material column formed by the polyester chips does not rotate with the rotation of the cloth plate. When the cloth plate rotates, the polyester chips in the through hole opposite to the discharge hole move toward the drying chamber below. In various implementation methods, the technical scheme can achieve uniform material discharge in the upper chamber and uniform material distribution in the lower chamber with two simple plates, effectively saving space in the shell, which is conducive to loading more polyester chips inside the shell and fully meeting production needs. In addition, the cloth assembly of the present invention has a simple structure, does not have too many connecting parts, is not prone to failure, and can reduce the number of maintenance and servicing during equipment operation.

[0010] Furthermore, a guide cone tube is provided at the center of the positioning plate, and an air hole is provided on the guide cone tube.

[0011] As the central part of the positioning plate, it needs to be connected to other components, and even a through hole cannot be set. Even if a through hole is set, the sharp angle of the through hole is too small to effectively discharge the material, which may affect the discharge of the material in the center of the material column. The guide cone can guide the part without a through hole to promote the uniform descent of the material to be dried.

[0012] Furthermore, a driving shaft is coaxially arranged in the shell, the driving shaft passes through the positioning plate and is rotatably connected to the positioning plate, and the driving shaft connects each distribution plate and agitator and drives the distribution plate and the agitator to rotate.

[0013] The technical solution discloses a driving body, namely, a driving shaft. The cloth plate and the stirring member of the technical solution are both connected to the driving shaft. One driving body realizes multiple driving effects at the same time. At the same time, because the positioning plate can prevent the polyester chips from rotating with the cloth plate, the stirring member rotating synchronously with the cloth plate can stir the material column formed by the polyester chips, giving full play to the coordination and promotion effect between the various mechanisms.

[0014] Furthermore, a discharge mechanism is connected to the lower surface of the material distribution plate, the upper end of the discharge mechanism is connected to the discharge hole, and the lower end contacts the material column formed by the material to be dried, and discharges the material to the upper end of the material column when the height of the material column decreases.

[0015] Because the material column needs to be stirred in the present invention, the material column cannot fill the entire drying chamber, and a certain distance needs to be maintained between the material column and the distribution plate. Therefore, a discharge mechanism is provided to maintain the distance. At the same time, the discharge mechanism can also store a certain amount of polyester chips. Even if the polyester chips in the feed chamber are not uniform material columns, uniform distribution in the drying chamber below can be achieved.

[0016] Furthermore, the discharge mechanism has at least one straight wall, the upper end of the straight wall is connected to the lower surface of the distribution plate along the radial direction of the distribution plate, and the discharge port is located on the side of the straight wall facing the rotation direction of the distribution plate.

[0017] Furthermore, the discharge mechanism has two arcuate walls and one straight wall, the two arcuate walls and the straight wall are connected to a frame with a side opening facing the rotation direction of the cloth plate, and the projection of the discharge mechanism on the cloth plate surrounds the discharge opening.

[0018] Furthermore, the discharge mechanism is a tubular body with a small upper end, a large lower end and a fan-shaped cross-section. The upper end of the discharge mechanism is connected to the discharge hole, and the lower end of the discharge mechanism is arranged along the radial direction of the distribution plate and contacts the upper end of the material column.

[0019] The above technical solution specifically discloses three forms of discharging mechanisms, all of which can achieve the effect of evenly distributing the material and maintaining a certain distance between the material column and the distributing plate.

[0020] Furthermore, the stirring member includes a plurality of stirring rods, each of which has at least one smooth guide surface, one end of which is low and the other end is high, wherein the lower end faces the rotation direction of the drive shaft, and when the driving shaft rotates, the stirring rod moves the material to be dried upward for a certain distance and then falls freely.

[0021] The stirring rod of the present technical solution is different from the conventional stirring paddle or other stirring mechanisms. The stirring rod of the present technical solution only loosens the polyester chips in the up and down directions, but does not produce a mixing effect, thereby avoiding the problem of insufficient drying time caused by the mixing effect causing the polyester chips fed later to flip to the discharge port.

[0022] Furthermore, the plurality of stirring rods are staggered, and the projection of each stirring rod on the horizontal plane is located outside the projection contour of the discharge mechanism on the horizontal plane.

[0023] This technical solution is mainly to avoid the position of the discharge mechanism, because the upper end of the material column at the discharge mechanism contacts the cloth plate through the polyester slices in the discharge mechanism, and there is a gap between the material column and the cloth plate at other positions. Only at the position of the gap can the stirring rod stir the material column.

[0024] Furthermore, the lower end of the shell is a cone, and an air distribution ring connected to the inner wall of the cone is provided at the lower end of the shell, an air cavity is formed between the air distribution ring and the inner wall of the cone, and the air cavity is connected to the hot air inlet pipe.

[0025] The air distribution ring can not only distribute air evenly, but also reduce the friction with the polyester chips due to the outward impact of the air distribution, so that the polyester chips can be unloaded smoothly and avoid the "rat hole" problem.

[0026] Furthermore, a material balancing plate is provided in the feed chamber. The material balancing plate is a vertical plate body arranged along the radial direction of the shell in the length direction. There is a gap between the lower end of the material balancing plate and the positioning plate at the lower end of the feed chamber. The material balancing plate is connected to the drive shaft and rotates with the drive shaft.

[0027] The material distribution plate enables the material to be dried in the feed chamber to be evenly distributed inside the feed chamber, rather than just accumulating under the feed pipe.

[0028] Furthermore, the upper end of the shell is connected to a feed pipe with a rotary discharger and an air outlet pipe, the air outlet pipe is connected to a cyclone dust collector, and the air outlet of the cyclone dust collector is connected to a heat exchanger to preheat the incoming air.

[0029] The hot air exhausted from the casing is also used to preheat the intake air, reducing fuel consumption.

[0030] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention forms a state of partitioned drying and gradual progressive drying of the material to be dried through the shell, the cloth assembly and the stirring member, thereby reducing the stacking degree of the polyester chips, avoiding the formation of parts with different densities in the lower layer of the material to be dried during the stacking process, and avoiding the problem of inconsistent hot air drying process in these areas. In addition, due to the effect of the stirring member, the polyester chips can be stirred, and the relative movement of the polyester chips can be achieved, reducing the occurrence of arching, bridging and other problems, achieving a more uniform drying effect, and reaching a lower water content. Therefore, the present invention can replace the existing filled drying tower and achieve a better and more uniform drying effect.

[0031] 2. The present invention uses two simple plates to achieve uniform material discharge in the upper chamber and uniform material distribution in the lower chamber, effectively saving space inside the shell, which is conducive to loading more polyester chips inside the shell and fully meeting production needs; the material distribution plate and the stirring member are both connected to the driving shaft, and one driving body realizes multiple driving effects. At the same time, because the positioning plate can prevent the polyester chips from rotating with the material distribution plate, the stirring member can stir the material column formed by the polyester chips, giving full play to the coordination and promotion role between the various mechanisms.

[0032] 3. The stirring rod of the present invention is different from the conventional stirring paddle or other stirring mechanisms. The stirring rod of the present invention only loosens the polyester chips in the up and down directions, but does not produce a mixing effect, thereby avoiding the problem that the polyester chips fed later are flipped to the discharge port due to the stirring effect due to the mixing effect, thereby causing insufficient drying time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a cross-sectional view of the connection between the housing, the cloth assembly and the agitator of the present invention; Figure 3 It is a schematic structural diagram of the connection between the cloth assembly and the stirring member of the present invention; Figure 4 The structure diagram of the connection between the material distribution plate and the material discharging mechanism of the present invention is shown in FIG. Figure 1 ; Figure 5 The structure diagram of the connection between the material distribution plate and the material discharging mechanism of the present invention is shown in FIG. Figure 2 ; Figure 6 The structure diagram of the connection between the material distribution plate and the material discharging mechanism of the present invention is shown in FIG. Figure 3 ; Figure 7 It is a cross-sectional view of the stirring rod of the present invention.

[0034] The numbers in the accompanying drawings are: 1. shell; 2. distribution component; 3. agitator; 4. rotary discharger; 5. feed pipe; 6. air outlet pipe; 7. cyclone dust collector; 8. heat exchanger; 9. hot air furnace; 10. fan; 11. feed chamber; 12. drying chamber; 13. material column; 14. through hole; 15. vent hole; 16. discharge hole; 17. guide cone; 18. air hole; 19. drive shaft; 20. discharge mechanism; 21. straight wall; 22. curved wall; 23. air distribution ring; 24. material balancing plate; 25. positioning plate; 26. distribution plate. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0036] like Figure 1 As shown, a polyester chip drying device comprises a shell 1, a cloth assembly 2 and an agitator 3, wherein the shell 1 is the outer shell of a filled drying tower, the upper end of the shell 1 is cylindrical, a heat-insulating layer is arranged outside the shell 1, and the lower end is conical, the upper end of the shell 1 is connected to a feed pipe 5 with a rotary discharger 4 and an air outlet pipe 6, the air outlet pipe 6 is connected to a cyclone dust collector 7, and the air outlet of the cyclone dust collector 7 is connected to a heat exchanger 8 for preheating the incoming air; the lower end of the shell 1 is connected to a hot air supply mechanism, the hot air supply mechanism comprises a hot air furnace 9 and a fan 10, a feed chamber 11 and a plurality of drying chambers 12 are arranged in the shell 1, the feed chamber 11 The drying chamber 12 and two adjacent drying chambers 12 are separated by a cloth assembly 2, each of which is provided with a channel for passing hot air, and each of which distributes the material to be dried (polyester chips) into the adjacent drying chamber 12 below and piles them up to form a material column 13 of a certain height, and each of which is provided with a stirring member 3 for stirring the material column 13, and the stirring member 3 causes the material to be dried (polyester chips) in the material column 13 to move in a small range, and the small range movement means that the polyester chips only move in place, and produce relative displacement with the adjacent polyester chips, but are not mixed with the polyester chips in other positions.

[0037] like Figure 2 and Figure 3As shown, the cloth assembly 2 includes a cloth plate 26 and a positioning plate 25, and the cloth plate 26 and the positioning plate 25 are both circular plates. The outer edge of the positioning plate 25 is fixedly connected to the inner wall of the shell 1, and the positioning plate 25 is arrayed with through holes 14 for unloading. The through holes 14 are fan-shaped, without overly sharp corners like triangles, and do not affect unloading. The through holes 14 also serve as a channel for passing hot air. A cloth plate 26 is provided below the positioning plate 25, and the cloth plate 26 is in contact with the positioning plate 25 or has a spacing of less than 3 cm. Ventilation holes 15 for passing hot air are evenly distributed on the cloth plate 26, and a discharge hole 16 is provided on the cloth plate 26. The discharge hole 16 is consistent in shape and size with the through hole 14 on the positioning plate 25, and the cloth plate 26 and the positioning plate 25 are coaxial and relatively rotatable. The discharge hole 16 is opposite to any through hole 14 up and down when the cloth plate 26 rotates.

[0038] The positioning plate 25 separates the material column 13 formed by the polyester chips from the distribution plate 26. The material column 13 formed by the polyester chips does not rotate with the rotation of the distribution plate 26. When the distribution plate 26 rotates, the through hole 14 opposite to the discharge hole 16 discharges the material. Two simple plates are used to achieve uniform discharge of the upper chamber and uniform distribution of the lower chamber, which effectively saves space in the shell 1 and is conducive to loading more polyester chips inside the shell 1, fully meeting production needs. In addition, the distribution component 2 of the present invention has a simple structure, does not have too many connecting parts, is not prone to failure, and can reduce the number of maintenance and servicing during the operation of the equipment.

[0039] like Figure 3 As shown, after the through hole 14 is provided, the positioning plate 25 becomes a frame structure. In order to meet the feeding needs of the polyester chips, the through hole 14 cannot fully extend to the center of the positioning plate 25. Therefore, there is a plate in the center of the positioning plate 25, which may easily cause the polyester chips to get stuck and difficult to fall. Therefore, a guide cone tube 17 is provided in the center of the positioning plate 25. The guide cone tube 17 is provided with an air hole 18. The guide cone tube 17 can guide the portion without the through hole 14 to promote the uniform descent of the polyester chips.

[0040] A drive shaft 19 is coaxially provided in the shell 1. The upper end of the drive shaft 19 passes through the shell 1 and is connected to the reducer and the motor at the upper end of the shell 1. The drive shaft 19 passes through the positioning plate 25 and is rotatably connected to the positioning plate 25. The distribution plate 26 and the agitator 3 are both connected to the drive shaft 19 and are driven by the drive shaft 19 to rotate.

[0041] One driving body realizes multiple driving effects. At the same time, because the positioning plate 25 can prevent the polyester chips from rotating with the cloth plate 26, the stirring member 3 can stir the material column 13 formed by the polyester chips, giving full play to the coordination and promotion effect between the various mechanisms.

[0042] The lower surface of the material distribution plate 26 is connected to a discharge mechanism 20 , the upper end of which is connected to the discharge hole 16 , and the lower end of which contacts the material column 13 to be formed by the polyester slices, and discharges material to the upper end of the material column 13 when the height of the material column 13 decreases.

[0043] Since the material column 13 needs to be stirred in the present invention, the material column 13 cannot fill the entire drying chamber 12, and a certain distance needs to be left between the material column 13 and the material distribution plate 26, so a discharge mechanism 20 is provided to maintain the distance.

[0044] like Figure 4 As shown, a design scheme for the discharge mechanism 20 is as follows: the discharge mechanism 20 has at least one straight wall 21, the upper end of the straight wall 21 is connected to the lower surface of the distribution plate 26 along the radial direction of the distribution plate 26, and the discharge port is located on the side of the straight wall 21 facing the rotation direction of the distribution plate 26.

[0045] This design has the simplest structure, but the polyester chips carried by the straight wall 21 may easily overflow because the two ends thereof are not closed, the rotation resistance increases and the shape of the material column 13 is affected to a certain extent.

[0046] like Figure 5 As shown, the second design scheme for the discharge mechanism 20 is as follows: the discharge mechanism 20 has two curved walls 22 and one straight wall 21, and the two curved walls 22 and the straight wall 21 are connected to a frame with a side opening toward the rotation direction of the cloth plate 26, and the projection of the discharge mechanism 20 on the cloth plate 26 surrounds the discharge port.

[0047] Compared with the first solution, this solution is provided with two arc-shaped walls 22, which can effectively limit the overflow of polyester chips inside the frame, so that the polyester chips are discharged from the bottom of the frame as the height of the material column 13 decreases. The discharge of materials has little effect on the shape of the material column 13, and operational failures are not prone to occur. Even if some jams occur, they can be effectively reduced due to the side openings, and can recover by themselves, reducing maintenance.

[0048] like Figure 6 As shown, the third design scheme for the discharge mechanism 20 is as follows: the discharge mechanism 20 is a tubular body with a small upper end, a large lower end and a fan-shaped cross-section. The upper end of the discharge mechanism 20 is connected to the discharge hole 16, and the lower end of the discharge mechanism 20 is arranged along the radial direction of the distribution plate 26 and contacts the upper end of the material column 13.

[0049] In this technical solution, the polyester chips are strictly confined to the inside of the tubular body, and can only be discharged from the lower end during feeding without overflowing. The height control of the material column 13 is more precise, but if problems such as jamming occur, it is not easy to repair.

[0050] like Figure 7As shown, the stirring member 3 includes a plurality of stirring rods, each of which has at least one smooth guiding surface, one end of which is low and the other end is high, wherein the lower end faces the rotation direction of the driving shaft 19, and the guiding surface includes but is not limited to a cylindrical surface, an inclined straight surface, or a curved surface with one end high and the other end low. When the driving shaft 19 rotates, the stirring rod causes the polyester chips to move upward for a certain distance and then fall freely; the stirring rod only causes the polyester chips to loosen in the up and down directions, but does not produce a mixing effect, thereby avoiding the problem of insufficient drying time caused by the mixing effect causing the polyester chips to be fed later to flip to the vicinity of the discharge port.

[0051] Multiple stirring rods are staggered, and the projection of each stirring rod on the horizontal plane is located outside the projection contour of the discharge mechanism 20 on the horizontal plane; this is mainly to avoid the position of the discharge mechanism 20, because the upper end of the material column 13 at the discharge mechanism 20 contacts the cloth plate 26 through the polyester slices in the discharge mechanism 20, and there is a gap between the material column 13 and the cloth plate 26 at other positions, and the stirring rod at the gap position has a better stirring effect on the material column 13.

[0052] The lower end of the shell 1 is a cone, and an air distribution ring 23 connected to the inner wall of the cone is provided at the lower end of the shell 1. An air cavity is formed between the air distribution ring 23 and the inner wall of the cone, and the air cavity is connected to the hot air inlet pipe; the air distribution ring 23 can not only distribute air evenly, but also reduce the friction with the polyester chips due to the air distribution effect, so that the polyester chips can be unloaded smoothly and the "rat hole" problem can be avoided ("Flow of Bulk Materials in Silos", Rao Yingchang, Feed Machinery, Issue 02, 1982).

[0053] like Figure 2 As shown, a material equalizing plate 24 is provided in the feed chamber 11. The material equalizing plate 24 is a vertical plate body arranged radially along the length direction of the shell 1. There is a gap between the lower end of the material equalizing plate 24 and the positioning plate 25 at the lower end of the feed chamber 11. The material equalizing plate 24 is connected to the drive shaft 19 and rotates with the drive shaft 19. The material equalizing plate 24 enables the polyester chips in the feed chamber 11 to be evenly distributed inside the feed chamber 11, rather than just accumulating under the feed pipe 5.

[0054] The working principle of the present invention is as follows: the lower end of the housing 1 of the present invention is directly connected to the feed port of the extruder. With the use of the extruder, the polyester chips in the drying chamber 12 at the lower end are reduced. Because of the stirring of the stirring member 3 and the effect of the air distribution ring 23, the polyester chips do not form bridges and arches, but can slide smoothly toward the lower discharge port, causing the material column 13 in the lower drying chamber 12 to descend, and the upper end of the material column 13 is separated from the discharge mechanism 20. At this time, because there is no blocking of the material column 13, the polyester chips in the discharge mechanism 20 move downward, and under the rotation of the distribution plate 26, they are layered. The polyester chips are distributed at the upper end of the material column 13, so that the upper end of the material column 13 contacts the lower end of the discharge mechanism 20 again, and the discharge mechanism 20 is blocked. At this time, the polyester chips in the discharge mechanism 20 no longer flow out. Similarly, the same action occurs in the drying chamber 12 above, and is transmitted to the feed chamber 11. The feed pipe 5 discharges the material into the feed chamber 11 through the rotary unloader 4. After the polyester chips enter the feed chamber 11, they are immediately scraped by the material balancing plate 24 and distributed at other positions of the feed chamber 11. The polyester chips also form a material column 13 in the feed chamber 11, ensuring that there are always polyester chips in the feed chamber 11 that can be supplied downward.

[0055] During the above operation, hot air enters from the lower end of the shell 1, and passes through the material column 13 formed by the polyester chips, the air holes 18 on the cloth plate 26, and the through holes 14 on the positioning plate 25 upward, enters the feed chamber 11, and is discharged to the outside, so that each polyester chip is fully and evenly dried.

[0056] Because all the polyester chips are no longer piled together, and the stirring mechanism loosens the polyester chips, the polyester chips of the present invention will not form a state where one area is dense and another area is loose, and the overall uniformity is good, the hot air permeability is good, and the drying is uniform and sufficient.

[0057] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

Claims

1. A polyester chip drying device, characterized in that: The invention comprises a shell (1), a material distribution component (2) and a stirring member (3); a feed chamber (11) and a plurality of drying chambers (12) are provided in the shell (1); the feed chamber (11) and the drying chamber (12) and two adjacent drying chambers (12) are separated by the material distribution component (2); each of the material distribution components (2) is provided with a channel for passing hot air; each of the material distribution components (2) distributes the material to be dried into the adjacent drying chamber (12) below and piles it up to form a material column (13) of a certain height; each of the material columns (13) is provided with a stirring member (3) for stirring the material column (13).

2. The polyester chip drying device according to claim 1, characterized in that: The cloth assembly (2) comprises a cloth plate (26) and a positioning plate (25), wherein the positioning plate (25) is fixedly connected to the housing (1), and an array of through holes (14) for unloading is arranged on the positioning plate (25), a cloth plate (26) is arranged below the positioning plate (25), and ventilation holes (15) for passing hot air are evenly arranged on the cloth plate (26), and a discharge hole (16) is arranged on the cloth plate (26), and the cloth plate (26) and the positioning plate (25) are coaxial and relatively rotatable, and when the cloth plate (26) rotates, the discharge hole (16) is vertically opposite to any through hole (14).

3. The polyester chip drying device according to claim 2, characterized in that: A drive shaft (19) is coaxially disposed in the housing (1), the drive shaft (19) passing through the positioning plate (25) and being rotatably connected to the positioning plate (25), the drive shaft (19) connecting each distribution plate (26) and the stirring member (3) and driving the distribution plate (26) and the stirring member (3) to rotate.

4. The polyester chip drying device according to claim 3, characterized in that: A discharge mechanism (20) is connected to the lower surface of the material distribution plate (26); the upper end of the discharge mechanism (20) is connected to the discharge hole (16), and the lower end contacts a material column (13) formed by the material to be dried; the discharge mechanism (20) discharges material toward the upper end of the material column (13) when the height of the material column (13) decreases.

5. The polyester chip drying device according to claim 4, characterized in that: The discharge mechanism (20) comprises two arcuate walls (22) and a straight wall (21), the two arcuate walls (22) and the straight wall (21) being connected to a frame with a side opening facing the rotation direction of the material distribution plate (26), and the projection of the discharge mechanism (20) on the material distribution plate (26) surrounds the discharge opening.

6. The polyester chip drying device according to claim 5, characterized in that: The stirring member (3) comprises a plurality of stirring rods, each of which has at least one smooth guide surface, one end of the guide surface being low and the other end being high, wherein the lower end faces the rotation direction of the drive shaft (19), and when the drive shaft (19) rotates, the stirring rods move the material to be dried upwards for a certain distance and then fall freely.

7. The polyester chip drying device according to claim 6, characterized in that: The plurality of stirring rods are staggered, and the projection of each stirring rod on the horizontal plane is located outside the projection contour of the discharge mechanism (20) on the horizontal plane.

8. The polyester chip drying device according to claim 1, characterized in that: The lower end of the shell (1) is a cone, and an air distribution ring (23) connected to the inner wall of the cone is provided at the lower end of the shell (1). An air cavity is formed between the air distribution ring (23) and the inner wall of the cone, and the air cavity is connected to the hot air inlet pipe.

9. The polyester chip drying device according to claim 3, characterized in that: A material balancing plate (24) is provided in the feed chamber (11). The material balancing plate (24) is a vertical plate body which is arranged along the radial direction of the shell (1) in the length direction. There is a gap between the lower end of the material balancing plate (24) and the positioning plate (25) at the lower end of the feed chamber (11). The material balancing plate (24) is connected to the drive shaft (19) and rotates with the drive shaft (19).

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