Efficient energy-saving drying equipment suitable for lyocell filament tows

Abstract

The utility model relates to the technical field of filament drying equipment, in particular to efficient energy-saving drying equipment suitable for lyocell filament tows, which solves the problem that the existing filament drying efficiency is low, and comprises a sealed cabin which is divided into a drying chamber and an equipment chamber, the drying chamber is provided with a wire leading groove and a wire outgoing groove which are used for filament tows to pass through, at least two hot drying rollers are arranged in the drying chamber, the filament tows run on the hot drying rollers in a spiral winding mode, and the contact area and time of the filaments and the hot drying rollers are increased by times through the spirally-wound tows; and the efficiency of the drying roller is effectively improved, and the good development prospect is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of filament drying equipment, and in particular to a high-efficiency and energy-saving drying equipment suitable for lyocell filament bundles. Background Technology

[0002] Lyocell fiber is hailed as the green fiber of the 21st century. It is a cellulose fiber produced from natural cellulose raw materials, such as wood pulp and bamboo pulp, by directly dissolving them in NMMO (N-methylmorpholine-N-oxide) solvent and then wet spinning. In actual production, depending on different process conditions, lyocell fiber can be divided into two different products: lyocell filament and staple fiber.

[0003] The utility model patent CN207846014U discloses a production line for washing, bleaching, oiling and drying twelve-head Lyocell filaments. It discloses a highly practical Lyocell filament fiber production line. After washing and oiling, the cellulose fiber bundles still contain a large amount of water and an appropriate amount of oil. Fiber drying is the last step in the filament spinning process.

[0004] Unlike synthetic fibers, the production process of lyocell filament fiber is a physical change process. Natural cellulose fibers dissolve in a high-concentration NMMO solvent and then precipitate in a low-concentration NMMO solvent. Therefore, during the filament formation process, lyocell filament fiber retains many characteristics of cellulose, such as strong water absorption. The moisture regain of lyocell filament fiber is much higher than that of ordinary synthetic fibers. Furthermore, due to the washing machine and water-based oiling agents, the moisture content of the lyocell filament fiber bundles is relatively high when they reach the drying process. This necessitates highly efficient drying equipment. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a high-efficiency and energy-saving drying equipment suitable for lyocell filament bundles, which solves the problem of low drying efficiency of existing filaments.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a high-efficiency and energy-saving drying device suitable for lyocell filament bundles, comprising a sealed chamber, the sealed chamber being divided into a drying chamber and an equipment chamber, the drying chamber being provided with lead-in grooves and lead-out grooves for the filament bundles to pass through, and at least two hot drying rollers being provided in the drying chamber, the filament bundles running on each of the drying rollers in a spiral winding manner.

[0007] By adopting the above technical solution, the filament bundle enters the drying chamber through the lead-in groove, runs spirally between the hot drying rollers, and is then discharged through the lead-out groove after drying. The spirally wound filament bundle increases the contact area and time between the filament and the hot drying rollers, effectively improving the efficiency of the drying rollers.

[0008] Furthermore, each of the hot drying rollers is equipped with a separately controlled heating device and a temperature sensing device, with the heating device installed inside the hot drying roller.

[0009] By adopting the above technical solution, the heating device provides the heat required for drying the filaments. The built-in design saves space, and all the heat generated is absorbed by the filaments for drying, greatly reducing the required energy.

[0010] Furthermore, the equipment chamber is equipped with a mounting frame for installing the heated drying rollers, and the mounting frame is connected to an angle adjustment device to adjust the angle between the central axis of each heated drying roller and the horizontal plane.

[0011] By adopting the above technical solution, the angle between the central axis of each hot drying roller and the horizontal plane can be adjusted individually, and each hot drying roller can be adjusted to operate synchronously at a parallel angle. The center line of the hot drying roller is usually not horizontal, and the size of the angle can affect the control of the line spacing of the filament bundle spiral, thereby further affecting the number of spiral turns.

[0012] Furthermore, each of the hot drying rollers is rotatably mounted on the mounting frame via bearings and bearing seats. The bearing seats are water-cooled bearing seats, which are sealed and connected to circulating cooling water.

[0013] By adopting the above technical solution, the heat from the hot drying roller will gradually be transferred to the bearing during the production process. Excessive temperature will greatly reduce the service life of the bearing. At this time, water-cooled bearing housing is required to cool down and improve the service life of the equipment.

[0014] Furthermore, an exhaust hood is installed at the top of the drying chamber, and the exhaust hood is connected to the dehumidification system, through which water vapor generated during the drying process is extracted.

[0015] By adopting the above technical solution, the water vapor generated during the filament drying process can be discharged in time, maintaining the dryness of the drying chamber and ensuring drying efficiency.

[0016] Furthermore, a protective window is provided on the side of the drying chamber, and the protective window is connected to a lifting linkage to control its opening and closing. The lifting linkage is connected to a counterweight via a pull rope, and a guide wheel assembly for the pull rope to be wound is provided inside the sealed chamber.

[0017] By adopting the above technical solutions, the protective window can be opened smoothly.

[0018] Furthermore, each of the aforementioned hot drying rollers is arranged vertically within the drying chamber.

[0019] By adopting the above technical solution, the vertical arrangement facilitates the tight winding of filaments. Compared with the horizontally arranged hot drying rollers, it avoids the bending of the middle transition section of the filaments due to gravity, while also saving space.

[0020] Furthermore, a frame is installed at the bottom of the sealed chamber.

[0021] By adopting the above technical solution, the equipment is fixed to the ground by a frame, ensuring the stability of the equipment.

[0022] Furthermore, each of the hot drying rollers is individually connected to a motor, which is located inside the equipment chamber.

[0023] By adopting the above technical solution, the motor drives each hot drying roller to rotate synchronously.

[0024] Furthermore, a guide wire buckle is provided at the outlet groove.

[0025] By adopting the above technical solution, the continuity of the filament is guaranteed.

[0026] Compared with the prior art, the advantages of this utility model are as follows: the spirally wound filament bundle increases the contact area and time between the filament and the hot drying roller by a factor of two, effectively improving the efficiency of the drying roller. Combined with the arrangement of the hot drying roller and the exhaust hood connected to the dehumidification system, the filament is prevented from becoming damp again, the drying time is reduced, the damage to the filament during the drying process is reduced, and the drying work is completed efficiently. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0028] Figure 2 This is a schematic diagram of the drying chamber structure of this utility model. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Example 1: By Figures 1 to 2 Provided is a high-efficiency and energy-saving drying device for lyocell filament bundles, comprising a sealed chamber, the sealed chamber being divided into a drying chamber and an equipment chamber, the drying chamber being provided with a lead-in groove 16 and a lead-out groove 17 for the filament bundle to pass through, and at least two hot drying rollers being provided in the drying chamber, the filament bundle running on each of the hot drying rollers in a spiral winding manner.

[0031] Based on Embodiment 1, each of the hot drying rollers is arranged vertically within the drying chamber.

[0032] Based on Embodiment 1, an exhaust hood 5 is provided on the top of the drying chamber, and the exhaust hood 5 is connected to the dehumidification system.

[0033] Based on Embodiment 1, each of the hot drying rollers is individually connected to a motor, and the corresponding hot drying rollers and motors are installed through separate mounting brackets 6. Each mounting bracket 6 is rotatably installed inside the equipment, with a motor installed at one end and a hot drying roller installed at the other end.

[0034] Taking two hot drying rollers as an example, the hot drying rollers include a first drying roller 1 below and a second drying roller 3 above. The motor includes a first driving device 13 that drives the first drying roller 1 and a second driving device 9 that drives the second drying roller 3. The lead wire groove 16 and the exit wire groove 17 are located near the second drying roller 3. The long filament bundle enters the drying chamber through the lead wire groove 16, goes up clockwise over the upper surface of the second drying roller 3 and then down, goes around the lower part of the first drying roller 1 and then goes back up to the upper end of the second drying roller 3. This is repeated for 6 to 8 turns to form a spiral. Under the action of the parallel angle of the two hot drying rollers, it maintains a fixed angle and spacing. After drying, it is discharged through the exit wire groove 17. The water vapor generated during the drying process is extracted through the exhaust hood.

[0035] Based on Embodiment 1, each of the hot drying rollers is provided with a separately controlled heating device and a temperature sensing device 11, and the heating device is installed inside the hot drying roller.

[0036] Heating devices typically include thermal oil heating, hot water heating, and electric heating. Thermal oil heating is usually used in scenarios where the drying temperature needs to be around 200℃, while hot water heating requires an additional hot water system and piping fittings in the dryer. Because lyocell filament fibers have a relatively high moisture regain coefficient, the required drying temperature is much lower than that for synthetic fibers. Excessive temperature can also cause the filament oil to react excessively, leading to filament fiber sticking to the roller and breakage. In this embodiment, the heating device uses electric heating in conjunction with a temperature sensing device to maintain a temperature on the hot drying roller sufficient for drying the filament without causing sticking and breakage due to excessive temperature. The electric heating system is installed inside the hot drying roller, saving space, and all the heat generated is absorbed by the filament for drying, greatly reducing the required energy.

[0037] Based on the above embodiments, the mounting frame 6 of each of the hot drying rollers is connected to the angle adjustment device 12 to adjust the angle between the central axis of each hot drying roller and the horizontal plane. The angle adjustment device 12 is a rod-shaped structure with a threaded rotation adjustment length. One end is hinged to the sealed chamber, and the other end is hinged to the mounting frame 6. The length of the angle adjustment device 12 is extended, which lifts the side of the mounting frame 6 where the motor is installed obliquely upward, while the side of the mounting frame where the hot drying roller is installed is tilted obliquely downward, thereby adjusting the angle between the central axis of the hot drying roller and the horizontal plane. The size of the angle affects the line spacing of the filament bundle spiral between the two hot drying rollers, thereby further affecting the number of turns of the spiral. Each of the hot drying rollers is rotatably mounted on the mounting frame 6 through bearings and bearing seats 7. The bearing seats are water-cooled bearing seats, sealed and connected to circulating cooling water to cool the bearings.

[0038] Based on Embodiment 1, a protective window 2 is provided on the side of the drying chamber. The protective window 2 is connected to a lifting linkage 4 to control its opening and closing. The lifting linkage 4 is connected to a counterweight 10 via a pull rope. A guide wheel assembly 8 for the pull rope to be wound is provided inside the sealed chamber. When the counterweight 10 falls, it causes the protective window 2 to open smoothly.

[0039] Based on Embodiment 1, a frame 14 is provided at the bottom of the sealed chamber.

[0040] Based on the above embodiment, a guide wire buckle is provided at the outlet groove 17.

[0041] Based on the above embodiments, the motor and the angle adjustment device 12 are installed in the equipment chamber to prevent moisture generated during filament drying from entering the interior of the components and causing them to become damp.

[0042] The above equipment was used to produce 130 dtex lyocell filament fibers at a spinning speed of 150 m / min and a drying temperature of 75°C. The moisture content of the filament fiber samples was 12.5%. The equipment was also used to produce 90 dtex lyocell filament fibers at a spinning speed of 120 m / min and a drying temperature of 70°C. The moisture content of the filament fiber samples was 12.4%.

[0043] Although the preferred embodiments of the present invention have been described in detail above, it should be clearly understood that various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high efficiency energy saving drying apparatus suitable for lyocell filament tow comprising a sealed cabin characterized in that, The sealed cabin is divided into a drying chamber and a device chamber, the drying chamber is provided with a lead-in slot (16) and a lead-out slot (17) for passing long filament bundles, at least two heat drying rollers are arranged in the drying chamber, and the long filament bundles are arranged to run spirally on the heat drying rollers.

2. A high efficiency energy saving drying apparatus suitable for lyocell filament tow as claimed in claim 1, wherein, A separately controlled heating device and a temperature sensing device (11) are arranged at each heat drying roller, and the heating device is arranged inside the heat drying roller.

3. A high efficiency energy saving drying apparatus suitable for lyocell filament tow as claimed in claim 1, wherein, An installation rack (6) for installing the heat drying rollers is arranged in the device chamber, and the installation rack (6) is connected with an angle adjusting device (12) for adjusting the included angle between the central axis of the heat drying roller and the horizontal plane.

4. A high efficiency energy saving drying apparatus suitable for lyocell filament tow as claimed in claim 3 wherein, Each heat drying roller is rotatably installed on the installation rack (6) through a bearing and a bearing seat (7), the bearing seat is a water-cooled bearing seat, and the bearing seat is sealingly arranged and connected with circulating cooling water.

5. A high efficiency energy saving drying apparatus suitable for lyocell filament tow as claimed in claim 1, wherein, An exhaust hood (5) is arranged at the top of the drying chamber, and the exhaust hood (5) is connected with a moisture removal system.

6. A high efficiency energy saving drying apparatus suitable for lyocell filament tow as claimed in claim 1, wherein, A protective window (2) is arranged on the side of the drying chamber, the protective window (2) is connected with a lifting connecting rod (4) for controlling opening and closing, the lifting connecting rod (4) is connected with a counterweight (10) through a pull rope, and a guide roller set (8) for winding the pull rope is arranged in the sealed cabin.

7. A high efficiency energy saving drying apparatus suitable for lyocell filament tow as claimed in claim 1, wherein, Each heat drying roller is arranged in an up-down manner in the drying chamber.

8. A high efficiency energy saving drying apparatus suitable for lyocell filament tow as claimed in claim 1, wherein, A rack (14) is arranged at the bottom of the sealed cabin.

9. A high efficiency energy saving drying apparatus suitable for lyocell filament tow as claimed in claim 1, wherein, Each heat drying roller is separately connected with a motor.

10. A high efficiency energy saving drying apparatus suitable for lyocell filament tow as claimed in claim 1, wherein, A guide wire buckle is arranged at the lead-out slot (17).

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