Water-absorbent resin drying device

Abstract

A water-absorbent resin drying device comprises a lower drying cylinder and an upper drying cylinder arranged above the lower drying cylinder, an air blowing assembly is arranged in the lower drying cylinder, and the air outlet end of the air blowing assembly faces the interior of the upper drying cylinder and is connected with a hot air source through an air inlet pipe; a first sieve plate and a second sieve plate are arranged in the upper drying cylinder at intervals, a rotating shaft is arranged between the first sieve plate and the second sieve plate, the upper end of the rotating shaft is connected with a gas collection cavity plate, and the upper end of the rotating shaft communicates with a ventilation pipe penetrating through the first sieve plate; and a driving assembly for driving the ventilation pipe to rotate is arranged on the first sieve plate. And through communication of the air supply pipe and the ventilation pipe, a hot air source can be provided for the air collection cavity plate, the spiral pipe and the heating auxiliary pipe, the air collection cavity plate, the spiral pipe and the heating auxiliary pipe are heated, heat of the air collection cavity plate, the spiral pipe and the heating auxiliary pipe is continuously dissipated in the upper drying cylinder in the rotating process, the temperature around the drifting water-absorbent resin is increased, and the drying speed is further increased.

Description

Technical Field

[0001] The utility model relates to the technical field of water-absorbing resin processing, in particular to a water-absorbing resin drying device. Background Art

[0002] Water-absorbing resin is a functional polymer material containing a large number of hydrophilic groups, with high liquid absorption capacity, high liquid absorption speed and high liquid retention capacity, and can be widely used in multiple fields, including sanitary products, such as sanitary napkins, diapers, adult multi-functional nursing pads, blotting paper and other products, making these products more lightweight, miniaturized and comfortable, and can also be used as medical materials, etc. In the process of preparation, water-absorbing resin needs to go through steps such as dissolution, neutralization, polymerization, cross-linking and curing, as well as washing and drying. When drying, a drying device is required. Currently, the fluidized bed dryer is used more frequently. Through the extensive contact between hot air and materials, the rapid drying of water-absorbing resin is realized, which has the advantages of good heat transfer effect and large production capacity. For example, the publication number is CN216011440U, which discloses a fluidized bed dryer with sufficient contact with materials. Through the setting of the air inlet pipe and the air distribution cap, the materials in the through body can be fluidized and dried. By setting the mixing component, the stirring of the materials can be improved to a certain extent. However, the inventor found in actual use that the method of setting air outlet holes on the mixing pipe and the mixing plate has certain defects. On the one hand, due to the large limitation on the particle size of water-absorbing resin, it is necessary to dry water-absorbing resin particles larger than the aperture of the air outlet holes. Otherwise, in the case of air outlet from multiple air outlets and the air distribution cap at the bottom, the wind blows against each other, and certain accumulation will occur at the air outlet holes. On the other hand, after the drying work is completed, due to the large amount of water-absorbing resin in the cylinder, it will accumulate on the air outlet holes and even enter the mixing pipe and the mixing plate, increasing the difficulty and time of cleaning the equipment in the later stage. Summary of the Utility Model

[0003] In order to solve the technical problems existing in the above background art, the utility model provides a water-absorbing resin drying device.

[0004] The technical solution of the utility model is as follows:

[0005] A water-absorbing resin drying device includes a lower drying cylinder and an upper drying cylinder arranged above it. A blowing component is arranged in the lower drying cylinder, and the air outlet end of the blowing component faces the inside of the upper drying cylinder, and is connected to a hot air source through an air inlet pipe;

[0006] A first sieve plate and a second sieve plate are arranged at intervals in the upper drying cylinder, and a rotating shaft is arranged between the two. The upper end of the rotating shaft is connected to a gas collecting cavity plate, and a through gas pipe penetrating the first sieve plate is communicated with the upper end thereof. The through gas pipe penetrates the upper drying cylinder through a delivery pipe and is communicated with the air inlet pipe. A driving component for driving the through gas pipe to rotate is arranged on the first sieve plate;

[0007] The lower end face of the air collecting cavity plate is symmetrically connected to two spiral tubes, and the bottom ends of the spiral tubes are connected to an air discharge pipe that penetrates through the second sieve plate and is rotatably connected to it. The air outlet end of the air discharge pipe is externally connected to the upper drying cylinder.

[0008] To increase the coverage area of the spiral tubes, the two spiral tubes extend downward from the air collecting cavity plate respectively and bypass and are connected to the air discharge pipe in front of and behind the rotating shaft.

[0009] To further increase the heating range, the length of the air collecting cavity plate is the same as the diameter of the upper drying cylinder. The straight-line distance from the connection position of the spiral tube and the air collecting cavity plate to the axis of the rotating shaft is 1 / 4 - 2 / 5 of the length of the air collecting cavity plate. The bottom of both ends of the air collecting cavity plate is connected to a vertically downward arranged heating sub-tube.

[0010] The specific design of the driving component is that the driving component includes a driving motor, and the output end of the driving motor is connected to a driving bevel gear, which is meshed with a driven bevel gear, and the outer edge of the ventilation pipe is connected to the driven bevel gear;

[0011] The ventilation pipe and the air supply pipe are connected through a rotary joint.

[0012] The specific design of the air blowing component is that the air blowing component includes a sleeve connected to the air inlet pipe, the upper end of the sleeve is connected to a gas distribution cap, and multiple gas distribution pipes are arranged on the outer edge of the gas distribution cap.

[0013] To make the air used for heating components such as the air collecting cavity plate and the spiral tubes recycled, an air pump is connected between the air inlet pipe and the hot air source, and the air outlet end of the air discharge pipe is connected to a return air pipe. The return air pipe and the air discharge pipe are connected through a rotary joint and the other end penetrates through the upper drying cylinder and is connected to the air inlet end of the air pump.

[0014] To facilitate the feeding and discharging of the water-absorbing resin, a feeding port and a discharging port are provided on the side of the upper drying cylinder, and the feeding port is located below the first sieve plate, and the discharging port is located above the second sieve plate.

[0015] The beneficial effects of the present utility model are as follows: The present utility model is a water-absorbing resin drying device. Firstly, through the design of the lower drying cylinder and the upper drying cylinder, in cooperation with the air-blowing assembly in the lower drying cylinder, the water-absorbing resin input from the feed port can be dried by boiling with the hot air blown by the air-blowing assembly, and after drying, it is unloaded from the drying cylinder at the discharge port. Secondly, the designed drive assembly drives the gas-collecting cavity plate to rotate, and then drives the spiral tube and the heating auxiliary tube to stir the water-absorbing resin in the upper drying cylinder, accelerating the fluidity of the water-absorbing resin, making it fully mixed with the hot gas, accelerating the drying effect, and through the connection of the air supply pipe and the ventilation pipe, a hot gas source can be provided for the gas-collecting cavity plate, the spiral tube and the heating auxiliary tube to heat the above components, so that the three continuously dissipate heat in the upper drying cylinder during rotation, increasing the temperature around the dispersed water-absorbing resin, further accelerating the drying speed. Compared with the comparative patent, this solution can improve the stirring and drying effects while facilitating the later cleaning of the drying cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description of the preferred embodiments below, the solutions and advantages of the present application will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model.

[0017] In the drawings:

[0018] Figure 1 is the overall structure diagram of the drying device;

[0019] Figure 2 is the sectional view of the drying device;

[0020] Figure 3 is the structure diagram of the drive assembly;

[0021] Figure 4 is the top view of the spiral tube and the gas-collecting cavity plate;

[0022] The components represented by the reference numerals in the drawings are as follows:

[0023] 1. Lower drying cylinder; 2. Upper drying cylinder; 3. Air-blowing assembly; 31. Sleeve; 32. Air-distributing cap; 33. Air-distributing pipe; 4. Air inlet pipe; 5. Hot gas source; 6. First sieve plate; 7. Second sieve plate; 8. Rotating shaft; 9. Gas-collecting cavity plate; 10. Ventilation pipe; 11. Air supply pipe; 12. Spiral tube; 13. Air discharge pipe; 14. Heating auxiliary tube; 15. Drive motor; 16. Driving bevel gear; 17. Driven bevel gear; 18. Rotary joint; 19. Air pump; 20. Return air pipe; 21. Feed port; 22. Discharge port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will describe the exemplary embodiments of the present disclosure in more detail with reference to the drawings.

[0025] Embodiment

[0026] This embodiment provides a water-absorbing resin drying device. Refer to Figure 1 , which includes a lower drying cylinder 1 and an upper drying cylinder 2 arranged above it, and the two are hermetically connected. And for the convenience of the overall movement of the drying device, the lower drying cylinder 1 is installed on a support frame, and moving wheels are arranged at the bottom of the support frame. By pushing the support frame, the overall drying device can be moved to a designated location.

[0027] In this embodiment, a blowing component 3 is arranged in the lower drying cylinder 1. Combining Figure 2 , and the air outlet end of the blowing component 3 faces the inside of the upper drying cylinder 2. An air outlet is arranged at the top end of the upper drying cylinder 1, and is connected to a hot gas source 5 through an air inlet pipe 4. The hot gas source 5 is located outside the upper drying cylinder 2, and the air inlet pipe 4 penetrates through the lower drying cylinder 1 and is communicated with the hot gas source 5. Specifically, the blowing component 3 includes a sleeve 31 communicated with the air inlet pipe 4, and the upper end of the sleeve 31 is connected with a gas distribution cap 32. The gas distribution cap 32 is set as a sphere, and multiple gas distribution pipes 33 are arranged on the outer edge of the gas distribution cap 32. The multiple gas distribution pipes 33 are installed on the outer edge surface of the spherical gas distribution cap 32, so that the hot gas can be sent into the upper drying cylinder 2 in different directions, making the hot air more uniform, and then making the dispersion of the water-absorbing resin relatively uniform. Moreover, in order to improve the power of the hot gas, an air pump 19 is connected between the air inlet pipe 4 and the hot gas source 5. The air pump 19 can be of a high-pressure type, and the hot gas is discharged from the gas distribution pipes 33 of the air supply component through the air inlet pipe 4.

[0028] On the basis of the above structure, the lower drying cylinder 1 mainly provides hot gas, and the upper drying cylinder 2 is used as the drying area of the water-absorbing resin. Specifically, a feeding port 21 and a discharging port 22 are arranged on the side of the upper drying cylinder 2, which are respectively used for feeding and discharging the water-absorbing resin. The discharging port 22 is located above the discharging port 22. And, a first sieve plate 6 and a second sieve plate 7 are arranged at intervals in the upper drying cylinder 2. The first sieve plate 6 is located above the second sieve plate 7. The feeding port 21 is located below the first sieve plate 6, and the discharging port 22 is located above the second sieve plate 7. And for the convenience of discharging, the second sieve plate 7 is set to be inclined, inclined downward toward the discharging port 22, and the end is flush with the discharging port 22. The pore diameters of the first sieve plate 6 and the second sieve plate 7 are both smaller than the particle size of the water-absorbing resin, and it is only necessary to ensure that the hot gas can pass through normally.

[0029] Secondly, a rotating shaft 8 is arranged between the first sieve plate 6 and the second sieve plate 7. The upper end of the rotating shaft 8 is connected with a gas collecting cavity plate 9, and a through air pipe 10 penetrating through the first sieve plate 6 is communicated with the upper end thereof. The two are rotationally and hermetically connected. A driving component for driving the through air pipe 10 to rotate is arranged on the first sieve plate 6. Combining Figure 3, and symmetrically communicate two spiral tubes 12 at the lower end face of the air collecting cavity plate 9. The bottom ends of the spiral tubes 12 are communicated with an air discharge pipe 13 that penetrates through the second sieve plate 7 and is rotatably connected thereto. The air discharge pipe 13 is connected to the bottom end of the rotating shaft 8. The driving assembly can drive the air pipe 10 to rotate, and then drive the spiral tubes 12 to rotate along with the air collecting cavity plate 9, so as to stir the water-absorbing resin in the upper drying cylinder 2, improve its fluidity, and fully mix with the hot air. Specifically, the driving assembly includes a driving motor 15. The driving motor 15 is located outside the upper drying cylinder 2 and is connected thereto through a mounting plate. The output end of the driving motor 15 penetrates into the upper drying cylinder 2 and is connected with a driving bevel gear 16. Through meshing connection, there is a driven bevel gear path 17, and the outer edge of the air pipe 10 is connected with the driven bevel gear. By driving the driving bevel gear 16 to rotate by the driving motor 15, and then driving the driven bevel gear to rotate through meshing, finally drive the air pipe 10 to rotate.

[0030] It should be noted that during the rotation of the air collecting cavity plate 9 and the spiral tubes 12 of this solution, the upper drying cylinder 2 can be continuously heated, the temperature around the water-absorbing resin can be increased, and the drying can be accelerated. Specifically, the air pipe 10 penetrates through the upper drying cylinder 2 through the air supply pipe 11 and is communicated with the air inlet pipe 4. Moreover, in order that when the air pipe 10 rotates, it will not drive the air supply pipe 11 to rotate synchronously, the two are connected through a rotary joint 18. The rotary joint 18 is an existing component, and a one-way rotary joint 18 can be used. Its main function is to fix one end of the pipeline and the other end of the pipeline can be fixed. The specific model can be purchased according to actual needs. The air inlet pipe 4 can send air to the air pipe 10 through the air supply pipe 11, and then send the hot air into the air collecting cavity plate 9 and send the hot air into the spiral tubes 12. The air outlet end of the air discharge pipe 13 is externally connected to the upper drying cylinder 2. And in order to recycle the hot air for heating the above components, the air outlet end of the air discharge pipe 13 is connected with a return air pipe 20. The return air pipe 20 is connected with the air discharge pipe 13 through a rotary joint 18 and the other end penetrates through the upper drying cylinder 2 and is connected with the air inlet end of the air pump 19. This rotary joint 18 can adopt the same model as the above. When drying the water-absorbing resin, a part of the hot gas passes through the air supply pipe 11 and the air pipe 10 and enters the air collecting cavity plate 9, and returns to the air inlet end of the air pump 19 through the spiral tubes 12, the air discharge pipe 13 and the return air pipe 20. During the process of the hot air flowing through, the air collecting cavity plate 9 and the spiral tubes 12 are heated, and continue to dissipate heat during the rotation after heating.

[0031] And, two vertically downward arranged heating auxiliary pipes 14 are communicated at the bottom of both ends of the air collecting cavity plate 9. The heating auxiliary pipes 14 have two functions. On the one hand, it can increase the stirring range, so that more water-absorbing resin can be fully stirred. On the other hand, it increases the heating area. A part of the hot air will also enter it through the air collecting cavity plate 9, which can heat the edge position of the upper drying cylinder 2, ensure the uniformity of the overall temperature, and make the drying of the water-absorbing resin more balanced.

[0032] It should be noted that the length of the gas collecting cavity plate 9 is the same as the diameter of the upper drying cylinder 2, so that the heating auxiliary pipe 14 can be installed at the edge position of the upper drying cylinder 2, ensuring that the temperature difference between the edge position and the middle is not large. Moreover, in combination with Figure 4 , the two spiral pipes 12 respectively extend downward from the gas collecting cavity plate 9 and bypass in front of and behind the rotating shaft 8 to communicate with the air discharge pipe 13. The middle positions of the two spiral pipes 12 extend towards the inner cylinder wall of the upper drying cylinder 2 to expand the coverage area of the spiral pipes 12. And the straight-line distance from the connection position of the spiral pipe 12 and the gas collecting cavity plate 9 to the axis of the rotating shaft 8 is 1 / 4 - 2 / 5 of the length of the gas collecting cavity plate 9. The above designs all enable the spiral pipes 12 to cover a larger area in the upper drying cylinder 2 when rotating, increasing the stirring and heating areas and shortening the drying time of the water-absorbing resin.

Claims

1. A water-absorbing resin drying device, comprising a lower drying cylinder (1) and an upper drying cylinder (2) arranged above it, characterized in that, A blowing component (3) is arranged inside the lower drying cylinder (1), and the air outlet end of the blowing component (3) faces the inside of the upper drying cylinder (2), and is connected to a hot air source (5) through an air inlet pipe (4); A first sieve plate (6) and a second sieve plate (7) are arranged at intervals inside the upper drying cylinder (2), and a rotating shaft (8) is arranged between the two. The upper end of the rotating shaft (8) is connected to a gas collecting cavity plate (9), and a through air pipe (10) penetrating through the first sieve plate (6) is communicated with the upper end thereof. The through air pipe (10) is communicated with the air inlet pipe (4) through a delivery air pipe (11) penetrating through the upper drying cylinder (2). A driving component for driving the through air pipe (10) to rotate is arranged on the first sieve plate (6); Two spiral pipes (12) are symmetrically communicated with the lower end surface of the gas collecting cavity plate (9), and the bottom ends of the spiral pipes (12) are communicated with an air discharge pipe (13) which penetrates through the second sieve plate (7) and is rotatably connected thereto. The air outlet end of the air discharge pipe (13) is externally connected to the upper drying cylinder (2).

2. The water-absorbing resin drying device according to claim 1, wherein, The two spiral pipes (12) respectively extend downward from the gas collecting cavity plate (9) and bypass in front of and behind the rotating shaft (8) to be communicated with the air discharge pipe (13).

3. The water-absorbing resin drying device according to claim 2, wherein The length of the gas collecting cavity plate (9) is the same as the diameter of the upper drying cylinder (2).

4. The water-absorbing resin drying device according to claim 3, characterized in that, The linear distance from the connection position of the spiral pipe (12) and the gas collecting cavity plate (9) to the axis of the rotating shaft (8) is 1 / 4 - 2 / 5 of the length of the gas collecting cavity plate (9).

5. The water-absorbing resin drying device according to claim 1, wherein, Two vertically downward arranged heating auxiliary pipes (14) are communicated with the bottoms of both ends of the gas collecting cavity plate (9).

6. The water-absorbing resin drying device according to claim 1, characterized in that, The driving component includes a driving motor (15), the output end of the driving motor (15) is connected with a driving bevel gear (16), which is in meshing connection with a driven bevel gear path (17), and is connected with the outer edge of the through air pipe (10) and the driven bevel gear; The through air pipe (10) and the delivery air pipe (11) are connected through a rotary joint (18).

7. The water-absorbing resin drying device according to claim 1, wherein The blowing component (3) includes a sleeve (31) communicated with the air inlet pipe (4). The upper end of the sleeve (31) is connected with a gas distributing cap (32), and a plurality of gas distributing pipes (33) are arranged on the outer edge of the gas distributing cap (32).

8. The water-absorbing resin drying device according to claim 1, characterized in that An air pump (19) is connected between the air inlet pipe (4) and the hot air source (5). The air outlet end of the air discharge pipe (13) is connected with a return air pipe (20). The return air pipe (20) and the air discharge pipe (13) are connected through a rotary joint (18), and the other end thereof penetrates through the upper drying cylinder (2) and is connected with the air inlet end of the air pump (19).

9. The water-absorbing resin drying device according to claim 1, characterized in that, A feed inlet (21) and a discharge outlet (22) are arranged on the side surface of the upper drying cylinder (2). The feed inlet (21) is located below the first sieve plate (6), and the discharge outlet (22) is located above the second sieve plate (7).

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