CN117824320A - Filament drying equipment and filament drying method - Google Patents

Abstract

The invention provides filament drying equipment and a filament drying method. In the filament drying process, a plurality of filament dividing rollers of the drying equipment guide small filament bundles in large filament bundles to a plurality of independent drying units respectively, and each drying unit is used for drying the small filament bundles respectively. Therefore, in the drying section, when a certain tow breaks, only the tow in the drying unit is processed, the other tows cannot be influenced, the influence of broken single tows on the whole production line is avoided, and the production efficiency is improved.

Description

Filament drying equipment and filament drying method

Technical Field

The invention relates to the field of filament production, in particular to filament drying equipment and a filament drying method.

Background

Filament fibers are now widely used in the textile industry in life. In the spinning production process, especially wet or dry spray wet spinning represented by cellulose fibers, the filament fiber bundles after washing and oiling are required to be dried, and a conventional drying mode is to dry a large filament bundle formed by a plurality of filaments through a large roller or wind the large filament bundle into a plurality of hot rollers for drying, and then the fibers in the large filament bundle are respectively led to a winding machine for winding after the large filament bundle is dried.

However, in the prior art, because the fibers in the large tows are all transmitted along the same path, each fiber in the large tows is sequentially unfolded in the axial direction of the drying roller, and because the temperature of the drying roller in the axial direction often has difference, the fibers after passing through the dryer have different water contents, so that the tension of each fiber is different, and in addition, the transmission distance of the fibers on the large roller or the plurality of drying hot rollers is long, fiber breakage is easily caused due to the reasons of tension change and the like, the fiber winding roller is caused after the fiber breakage, the drying hot rollers are required to be stopped, all the fibers in the drying equipment are required to be stopped for processing, and the tows are dried again after the tangled fibers on the hot rollers are cleaned, so that the raw materials and the time are greatly wasted, and the production efficiency is seriously influenced. Therefore, there is a need to find a more effective filament drying production method to improve the production efficiency and quality of the product.

Disclosure of Invention

The invention aims to provide filament drying equipment and a filament drying method, which can avoid the influence of fiber breakage on production efficiency in the drying process.

Hereinafter, the term "small filament bundle" refers to a filament bundle formed by fiber monofilaments spun at a single spinning station, that is, a fiber bundle when the final winding device winds; the large tows are formed when a plurality of small tows are gathered on a mechanism such as a water washing roller and a conveying roller in the fiber production process, the large tows are formed by gathering a plurality of small tows, the large tows are not particularly strands, the large tows can be flaky in appearance with a certain thickness on the conveying roller, small tows in the large tows are not limited to be tightly adjacent, and a certain interval can be formed between small tows in the large tows.

The specific scheme is as follows:

the filament drying equipment comprises a frame and a conveying roller, and is characterized in that a plurality of independent drying units are arranged in parallel on the frame, each drying unit is correspondingly provided with a winding device, at least one filament separating device is arranged on the frame, and the filament separating device is arranged between a front conveying roller and the drying units.

The front conveying roller refers to a roller for conveying the tow before the tow enters the drying unit. The yarn dividing device mainly plays a role of steering small yarn bundles, is used for respectively guiding small yarn bundles in large yarn bundles conveyed on a front conveying roller to each independent drying unit in the working process, and can be a roller, a roller with yarn grooves or other types of yarn bundle guiding devices such as a yarn guide ring. When the yarn dividing device is a yarn dividing roller, the plurality of drying units can share one yarn dividing roller, but preferably, each drying unit is correspondingly provided with a respective yarn dividing device. The independent drying units are arranged in parallel, and all tows on the production line can be respectively guided to the drying units which are arranged in parallel, so that when a certain tow breaks in the drying section, only the tows in the drying units are processed, and the influence on other tows is avoided.

Further, each drying unit comprises a drying roller set, and each drying roller set at least comprises a first drying roller and a second drying roller.

Further, the first drying roller and the second drying roller are cylindrical rollers, and the axes of the first drying roller and the second drying roller form an angle alpha, and the angle alpha is 0.5 degrees to 15 degrees, preferably 1 degrees to 8 degrees, and more preferably 3 degrees.

When the small tows are wound on the two drying rollers, the roller surface is inclined, so that the small tows can deviate towards one direction in the advancing process in a controllable mode due to the fact that the roller surface can be inclined, the phenomenon of tow entanglement caused by random left-right deviation of the small tows is avoided, and the probability of small tow winding is reduced when one small tow is dried. Because the small filament bundle wound on the two drying rollers can deviate along the end of the two drying rollers, when the small filament bundle is wound on the two drying rollers, the small filament bundle should be wound from the end of the two drying rollers, which is far away, and separated from the end of the two drying rollers, which is near to the two drying rollers, so that the small filament bundle is fully contacted with the drying rollers.

Further, the diameter of the drying roller is 50-800mm, preferably 100-400mm.

The roller diameter is too big, then is difficult to guarantee that roller surface temperature is even, and the roller diameter is too little, and little silk bundle and stoving roller's contact length is not enough, is difficult to play good stoving effect.

Further, the length of the drying roller is 100-1200mm.

Optionally, the drying unit comprises a truncated cone-shaped drying roller.

Further, the included angle between the side generatrix of the truncated cone-shaped drying roller and the roller axis is 0.25-12 degrees, preferably 0.5-6 degrees, and more preferably 1.5 degrees.

The round platform-shaped drying roller comprises two bottom surfaces with different sizes and a roller surface, after the tows are guided to the round platform-shaped drying roller, the tows are wound on the roller surface from one end close to the larger bottom surface as a starting point, and after a plurality of circles of the tows are wound on the roller surface, the tows leave the round platform-shaped drying roller from one end close to the smaller bottom surface and are conveyed to the winding device for winding. In the invention, the side bus refers to a line segment formed by intersecting the cross section of the axis of the truncated cone-shaped drying roller and the roller surface, and the included angle between the bus and the roller axis refers to the included angle of the roller surface relative to the axis. Because the roller surface of the round table-shaped drying roller has a certain included angle relative to the roller axis, the roller surface can have an axial component force on the small tows, so that the small tows can deflect towards one direction in the advancing process in a controllable mode, the phenomenon of yarn bundle entanglement caused by random left-right deflection of the small tows is avoided, and the probability of yarn bundle entanglement is reduced when one small tow is dried.

Further, the diameter of the truncated cone-shaped drying roller is 50-800mm, preferably 100-400mm. The diameter of the truncated cone-shaped drying roller is the average value of the diameters of the two bottom surfaces of the truncated cone-shaped drying roller.

The roller diameter is too big, then is difficult to guarantee that roller surface temperature is even, and the roller diameter is too little, and little silk bundle and stoving roller's contact length is not enough, is difficult to play good stoving effect.

Further, an oiling device is arranged on the frame and is arranged in front of the drying unit.

The tows are oiled before being dried, so that the adhesion and friction between the tows and a drying roller can be reduced, and the tows can be better prevented from being broken in the drying process.

Furthermore, the oiling device is required to be arranged before the drying unit, and the oiling device can be arranged at other positions of the filament production equipment according to the requirement, for example, the oiling device can be arranged between the drying unit and the winding unit, so that filament breakage in the winding process is avoided.

Further, the oiling device comprises a first oiling device and a second oiling device, and the oiling surfaces of the first oiling device and the second oiling device are opposite.

The term "opposite" in the present invention means that the oiling devices are located at two sides of the tow, and the oiling surfaces of the two oiling devices are both oriented to the tow, so that the first oiling device and the second oiling device can oil two surfaces of the tow respectively. The term "opposite" does not particularly mean that the two upper oil surfaces are strictly opposite, as long as the two upper oil surfaces face the two sides of the tow when they are arranged.

A filament drying method, characterized by comprising the following steps:

1) Conveying the filament large filament bundles to drying equipment through conveying rollers;

2) A plurality of filament dividing rollers of the drying equipment guide small filament bundles in the large filament bundles to a plurality of independent drying units respectively;

3) Each drying unit respectively dries the small tows;

4) And winding the dried small tows into filament yarn bundle packages by a winding device corresponding to the drying unit.

Further, in step 2), the small tow is wound around the first drying roller and the second drying roller in this order, with the number of winding cycles being not less than 10 weeks, preferably not less than 20 weeks, more preferably not less than 30 weeks, when it is introduced into the drying unit.

The number of winding cycles is too small, the contact length of the filament bundles and the drying roller is too short, and the drying effect is poor, so that the number of winding cycles is not less than 10 weeks, and the better drying effect can be achieved by winding for 10 weeks under the condition of higher temperature of the drying roller or larger roller diameter, but the too high drying temperature can possibly cause the strong reduction of fibers, the whiteness is reduced and the fiber quality is affected, and therefore, the number of winding cycles is preferably not less than 20 weeks, more preferably not less than 30 weeks under the relatively lower drying temperature. An excessive number of turns requires a longer drying roll or a more dense filament bundle winding interval, and therefore the number of winding turns is preferably not more than 80 turns, more preferably not more than 60 turns.

Further, in step 2), when the tows are wound on the drying roller, the distance between adjacent tows is not less than 1cm.

Further, in step 3), the working temperature of the drying roller is 98-150 ℃, preferably 98-130 ℃.

In the conventional drying process, since a plurality of small tows are sequentially arranged on the drying roller for drying, in order to ensure the drying effect, the diameter of the drying roller is generally required to be increased or a plurality of drying rollers are required to be arranged so as to ensure the contact time between the tows and the surface of the drying roller. Since the temperature of the hot roller is generally controlled by the heating medium in the cavity of the hot roller, the larger the diameter of the roller is, the worse the temperature uniformity of different positions of the roller surface is, and the higher the drying temperature and the drying energy consumption are under the same yield. In the drying method provided by the invention, each drying unit only dries one small tow, and the tows which are adjacently wound in the winding process of the small tows are spaced at certain intervals, so that the diameter of the roller can be designed smaller, the temperature uniformity of different positions on the surface of the roller is better controlled, and compared with the large tows, the water content in the single small tow is less, the same drying effect can be achieved by adopting relatively low drying temperature, and the influence on the quality of fibers is smaller.

Further, the linear speed of the rotation of the drying roller is 200-1500m/min.

The beneficial effects are that:

according to the filament drying equipment provided by the invention, the plurality of groups of independent drying units are arranged on the rack in parallel, and all filament bundles on the production line can be respectively guided to the plurality of drying units arranged in parallel, so that when a certain filament bundle breaks in a drying section, only the filament bundles in the drying units are processed, the other filament bundles are not influenced, the influence of broken filament of a single filament bundle on the whole production line is avoided, and the production efficiency is improved.

According to the filament drying method provided by the invention, the washed small filament bundles are respectively guided to the plurality of independent drying units, so that the influence on the whole production line when a certain small filament bundle breaks is avoided. In addition, the drying equipment in one drying unit is only used for drying one small silk bundle, compared with the drying of large silk bundles gathered together, the low drying temperature can achieve a good drying effect, and the damage of high temperature to fibers is reduced.

Drawings

FIG. 1 is a schematic view of a filament drying apparatus according to the present invention

FIG. 2 is a side view showing the operation state of a drying unit of the filament drying apparatus according to the present invention

FIG. 3 is a side view showing the working state of the filament drying apparatus according to the present invention using a truncated cone-shaped drying roller

The reference numerals are explained as follows:

10. frame 11, dehumidifier 12, aperture 13, first conveyor roller 14, second conveyor roller 20, dryer unit 21, first dryer roller 22, second dryer roller 23, splitter roller 24, cone dryer roller 30, winder unit 40, large tow 41, small tow 51, first oiling device 52, second oiling device

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made in order to achieve the developer's specific goals. It is also to be noted that elements and features described in one drawing or one embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments, and only device structures closely related to the aspects according to the present invention are described in the drawings and description in order to avoid obscuring the present invention by unnecessary detail, and some structures are omitted in the drawings in order to more clearly show the structures of the apparatus of the present invention, so as to highlight important part of the features.

In the conventional filament drying process, the whole bundle of filaments is generally wound on a large-diameter drying roller or a multi-stage drying roller for drying, and after the drying is finished, the large bundle of filaments is divided into small bundles which are respectively wound and wound. Taking cellulose filament production as an example, conventional cellulose filament production needs to be subjected to spinning, water washing, oiling, drying, winding and other procedures, wherein the spinning procedure generally comprises more than 20 spinning stations, a spinneret plate of each spinning station ejects a plurality of fibers to form filament tows, the tows formed by each spinning station are gathered together to form big tows, the big tows pass through a water washing machine and a dryer together through a conveying roller, and finally each small tow is wound and wound by a corresponding winding device to obtain the packaged filament. Because the drying paths of the small tows are the same and all are conveyed downstream along the same large-diameter drying roller or the multi-stage drying roller, in the drying process, the fiber is contracted to cause tension increase, if the drying rates of the small tows are inconsistent, the tension among the small tows is inconsistent, the tension is too large or too small to cause breakage, and when the broken yarn occurs in a certain small tow, the broken yarn not only affects the quality of the filament, but also can cause winding roller to force the production line to stop, so that the broken yarn can be treated timely. However, in the existing drying equipment, all paths of small tows are the same, so that once a certain tow of filaments breaks, the whole production line must be stopped, and the production efficiency is seriously affected.

Hereinafter, the solution of the present invention to the above problems will be described by way of specific embodiments.

Example 1

The embodiment provides a filament drying device, as shown in fig. 1, the drying device includes a frame 10, a dehumidifier 11 and a plurality of conveying rollers are arranged on the frame 10, a plurality of drying units 20 are also arranged on the frame 10 in parallel, each drying unit includes a first drying roller 21 and a second drying roller 22, and each drying unit is correspondingly provided with a winding device 30.

In the filament drying apparatus provided in this embodiment, a plurality of drying units 20 are disposed on the frame 10, and each drying unit is relatively independent, and can individually dry a small filament bundle, and the dried small filament bundle is wound by a corresponding winding device 30. The mode that big tow was unified to be dried has been abandoned in the setting like this, and every little tow is dried through solitary stoving unit 20, even take place the broken silk at certain little tow in the stoving in-process, only handle this little tow can, can not influence the stoving and the rolling of little tow in other stoving units 20.

Drying unit 20 may take any configuration or device capable of drying the small tows, such as a small multi-stage drying roller, or oven, suitable for drying small tows. In this embodiment, the drying unit 20 includes a first drying roller 21 and a second drying roller 22, both drying rollers have heating functions, and the heating functions can be achieved by any existing technology, for example, a hot oil pipeline is arranged in a roller body or a resistance wire is arranged for heating, in this embodiment, the first drying roller 21 and the second drying roller 22 include roller bodies, a drying roller conduction oil system and a chain transmission mechanism, a driven sprocket is mounted on the roller bodies, and the chain transmission mechanism includes a driving sprocket connected with a speed reducer and a chain connecting the driving sprocket and the driven sprocket on the roller bodies. In this embodiment, the diameters of the first drying roller 21 and the second drying roller 22 are 220mm, and the small filament bundles are alternately wound on the two drying rollers as shown in fig. 1 and 2, that is, the small filament bundles pass through the first drying roller 21 and then pass through the second drying roller 22 and then return to the first drying roller 21, and then are wound for a plurality of turns in sequence, and the final winding number is determined according to the process value. The small tows are wound on the drying rollers, so that the contact length with the drying rollers is increased, drying of the small tows can be achieved through the two drying rollers, and the dried small tows can be conveyed to the winding device 30 for winding.

Each drying unit 20 in this embodiment further comprises a plurality of pinch rollers 23, said pinch rollers 23 being in fact a conveyor roller, said pinch rollers 23 being arranged between the former and the drying unit 20. The function of the dividing roller 23 is to separate and guide the small tows 41 from the large tows 40 conveyed from the former device to the drying equipment of the drying units 20, in this embodiment, each drying unit is correspondingly provided with one dividing roller 23, and the dividing roller 23 guides the small tows 41 from the large tows 40 and winds them on the first drying roller 21 and the second drying roller 22. In practical use, the filament separating device is not limited to the filament separating roller, but may be a roller provided with a filament groove, or other types of filament bundle guiding devices such as a filament guiding ring. In an alternative real-time manner, after the large tows 40 pass through the second conveying roller 14, the small tows 41 in the large tows 40 may be directly guided to each drying unit 20, in which form the second conveying roller 14 may be regarded as a yarn dividing device, but in which form, a part of the small tows 41 need to be conveyed over a long distance, and the tension change is unstable, so that the multiple yarn dividing rollers 23 are selectively arranged in the manner shown in fig. 1 in order to ensure that the tension of each small tow 41 is relatively stable. The front device is equipment in front of the dryer, such as a washing machine or an oiling device.

The frame 10 in this embodiment is a cuboid formed by connecting a bottom frame, upright posts and a top frame, as shown in fig. 1, the left side and the right side of the frame 10 are provided with side plates, the left side plate is provided with holes 12 through which tows pass, the top frame is provided with a top plate, the top plate is connected with a dehumidifier 11 for extracting water vapor generated in the tow drying process from drying equipment, and a door frame and a door are arranged in front of the frame (i.e. in the direction of the vertical paper surface outwards in fig. 1) so as to facilitate the workers to draw and process broken filaments.

The drying unit 20 including the first drying roller 21 and the second drying roller 22 can dry a single small tow, and when one small tow is dried, yarn breakage occurs, so that drying and winding of the small tow of other drying units are not affected.

When the small tows are wound on the horizontally arranged drying roller, the tows can randomly shift leftwards or rightwards in the transverse direction due to equipment vibration and the like in the running process of equipment because the tows are not stressed in the transverse direction, so that the tows can be entangled with the tows at adjacent positions on the roller body, and the probability of broken filaments is increased. Therefore, in this embodiment, the axes of the first drying roller 21 and the second drying roller 22 are preferably at an angle α, specifically, the angle α is 3 ° in this embodiment. As shown in fig. 2, in this embodiment, two drying rollers are cylindrical, one end of the first drying roller 21 and one end of the second drying roller 22 are fixed on the frame 10, and the other end is suspended. At the end near the frame 10, the distance between the two drying rollers is greater than the distance between the two drying rollers at the end in the air, so that the two drying rollers form an included angle. Specifically, the two drying rollers forming the included angle can be that the axes of the two rollers are inclined relative to the horizontal line, or that one of the axes of the two drying rollers is horizontal, and the other axis of the two drying rollers is inclined relative to the horizontal line, so that the two drying rollers form the included angle. In this embodiment, the axes of both drying rollers are inclined inward from the horizontal. In the drying process, the tows shrink due to evaporation of water, the tension of the tows is increased, and the roller bodies of the drying rollers are inclined relative to a horizontal line, so that when small tows are wound on the two drying rollers, the small tows are subjected to a component force pointing to the suspension end of the drying roller in the horizontal direction when wound on the roller bodies, after the device is started, the small tows can deviate in a spiral line form along with the rotating drying rollers in the same direction in a controllable mode under the action of the component force, and the problem of entanglement among small tows at adjacent positions is effectively avoided. In addition to the cylindrical roller tilting described in this embodiment, two conical rollers with parallel axes may be used to achieve the tilting of the roller surface, the diameter of the conical rollers fixed to the frame end being larger than the diameter of the free end, so that a component force directed to the free end can be achieved for the small tow during operation. However, the conical rolls are more difficult and costly to manufacture than cylindrical rolls, and the form of the dryer rolls described in this embodiment is preferred.

In this embodiment, the frame 10 is further provided with an oiling unit. The oiling unit is used for reducing adhesion and friction between the tows and the drying device, and further avoiding the problem of yarn breakage in the tow drying process. In this embodiment, the oiling unit includes a first oiling device 51 and a second oiling device 52. The big tow enters the drying equipment from the upstream device through the hole 12, the big tow is conveyed along the first conveying roller 13 and the second conveying roller 14 which are arranged on the frame 10, after passing through the second conveying roller 14, the big tow 40 is separated into small tows 41 by the corresponding yarn dividing rollers 23 of each drying unit 20, therefore, the first oiling device 51 and the second oiling device 52 are arranged between the first conveying roller 13 and the second conveying roller 14, and the oiling surfaces of the first oiling device 51 and the second oiling device 52 are respectively positioned at two sides of the travelling route of the big tow 41. Because the large tow 40 is in a flat shape when conveyed on the conveying roller in the filament production process, uneven oiling can be caused by oiling only one side of the large tow 40, and two sides of the tow can be uniformly oiled by arranging one oiling device on each side of the tow. The circumferential surface of the conveying roller is provided with a plurality of yarn guide grooves, the number of the grooves is determined according to the number of the small yarn bundles 41, and the conveying roller is a passive roller in the embodiment and is made of polished stainless steel.

The oiling device can be any existing tow oiling device, in this embodiment, the oiling device comprises an oil groove, an oil roller, an oil inlet and return system and an oiling chain transmission mechanism, and a roller coating mode is adopted to oil the large tows. The oiling chain transmission mechanism further comprises a driving sprocket connected with a speed reducer, a driven sprocket is arranged on the oiling roller, the driving sprocket is connected with the driven sprocket through a chain, and the speed reducer is driven by a variable frequency motor.

The winding device 30 described above is provided corresponding to the drying units 20, and one winding device 30 is provided corresponding to each drying unit 20. In this embodiment, the large tows are formed by collecting small tows sprayed out from 24 spinning positions, and each small tow corresponds to one drying unit 20 and one winding device 30, and the number of the drying units 20 and the winding devices 30 in this embodiment is 24.

A plurality of winding devices 30 may be provided for each drying unit 20, but each drying unit 20 should have less than 5 winding devices, preferably less than 3 winding devices. When each drying unit 20 dries a small tow, each drying unit 20 corresponds to one winding device 30, but in the filament production process, often a large tow will contain a plurality of small tows (often more than 20 tows), each small tow is dried by using one drying unit 20, the equipment will be relatively bulky, and the occupied area is large. Two or more small tows can be wound on one drying unit 20, so that if a certain small tow breaks, only the small tows wound on the same drying unit 20 are affected, and the rest of small tows are not affected by the small tows, so that equipment investment can be greatly reduced while the broken small tows are prevented from affecting the winding of other small tows. However, it is preferable that each drying unit 20 corresponds to only 5 or less winders 30, that is, at most 5 tows are wound on each drying unit 20, and if the tows are too much wound, the tows wound on the same drying unit 20 are easily wound and broken. Preferably, 3 winders 20 are provided per drying unit 20, more preferably 2 winders 30 are provided per drying unit 20, and most preferably 1 winder 30 is provided per drying unit 20.

In this embodiment, the winding device 30 includes a tension control device, a cylinder, and a pressing roller, a spinning groove roller, and a winding roller, which are not shown in the figure, and are connected to the power output end of the cylinder. The tension control system, the pressing roller and the winding roller are matched and used for pressing and winding filaments, and the spinning head grooved roller and the winding roller are driven by a variable frequency motor.

Example 2

The present embodiment provides a filament drying apparatus having a structure similar to that of embodiment 1, except that, as shown in fig. 3, the drying unit 20 is not two cylindrical drying rollers but includes one truncated cone-shaped drying roller 24.

In this embodiment, the diameter of the bottom surface of one end of the circular truncated cone-shaped drying roller 24 fixed on the frame 10 is 222mm, the diameter of the bottom surface of the suspended end is 180mm, the length of the roller is 800mm, the generatrix of the roller surface forms an angle of about 1.5 ° with the roller axis, when the small filament bundles are wound on the circular truncated cone-shaped drying roller 24, the small filament bundles are gathered in one direction due to the fact that the roller surface of the circular truncated cone-shaped drying roller 24 faces one direction, a component force pointing to the suspended end is applied to the small filament bundles in the horizontal direction when the small filament bundles are wound on the roller body, and after the device is started, the small filament bundles are offset towards the same direction along with the rotating circular truncated cone-shaped drying roller in a controllable manner under the action of the component force, so that the entanglement probability between the small filament bundles at adjacent positions is effectively reduced.

Example 3

Based on the filament drying apparatus of embodiment 1, this embodiment provides a filament drying method. The drying method comprises the following steps:

the big tows washed by the previous procedure enter drying equipment through holes 12 on the side plate of the frame 10, in the drying equipment, each small tow in the big tows is arranged in a groove of a conveying roller in a one-to-one correspondence manner, the big tows are paved on the conveying roller in a manner similar to tiling and sequentially conveyed along the first conveying roller 13 and the second conveying roller 14, and in the conveying process, the big tows are respectively subjected to oiling treatment on two sides of the big tows through a first oiling device 51 and a second oiling device 52. After the big tow subjected to the oiling treatment passes through the second conveying roller 14, the small tows are respectively guided to the drying units 20 by the yarn dividing rollers 23 in each drying unit 20. The small filament bundles entering the drying unit 20 are wound around the first drying roller 21 and the second drying roller 22 in sequence for 30 weeks, the distance between adjacent winding drying roller shafts is controlled to be 1cm in the winding process, the working temperature of the drying rollers is 98-150 ℃, preferably 98-130 ℃, in the embodiment, the temperature of the drying rollers is controlled to be 105 ℃, the rotating speeds of the two drying rollers are 500m/min, and the small filament bundles wound on the roller sets are dried along with the rotation of the drying roller sets. Since each drying unit 20 dries only one small tow, even if a certain small tow breaks, only the tow in that drying unit is processed, and the small tow being dried in the other drying units 20 is not affected. The small tows dried by the drying unit 20 are wound by the corresponding winding device 30, and the dried filament bundle package is obtained. The moisture content of the dried filament bundles was 11%.

Claims (10)

1. The filament drying equipment comprises a frame and a conveying roller, and is characterized in that a plurality of independent drying units are arranged in parallel on the frame, each drying unit is correspondingly provided with a winding device, at least one filament separating device is arranged on the frame, and the filament separating device is arranged between a front conveying roller and the drying units.

2. A filament drying apparatus according to claim 1, wherein each drying unit comprises a drying roller set, each drying roller set comprising at least a first drying roller and a second drying roller.

3. A filament drying apparatus according to claim 2, wherein the first and second drying rollers are cylindrical rollers and the axes of the first and second drying rollers are at an angle α of 0.5 ° -15 °, preferably 1 ° -8 °, more preferably 3 °.

4. A filament drying apparatus according to claim 2, wherein the diameter of the drying roller is 50-800mm, preferably 100-400mm.

5. A filament drying apparatus according to claim 1, wherein said drying unit comprises a truncated cone-shaped drying roller.

6. A filament drying apparatus according to claim 5, wherein the side generatrix of the truncated cone shaped drying roller is at an angle of 0.25 ° to 12 °, preferably 0.5 ° to 6 °, more preferably 1.5 ° to the roller axis.

7. A filament drying method using the filament drying apparatus according to any one of claims 1 to 6, comprising the steps of:

1) Conveying the filament large filament bundles to drying equipment through conveying rollers;

2) A plurality of filament dividing rollers of the drying equipment guide small filament bundles in the large filament bundles to a plurality of independent drying units respectively;

3) Each drying unit respectively dries the small tows;

4) And winding the dried small tows into filament yarn bundle packages by a winding device corresponding to the drying unit.

8. The filament drying method according to claim 7, wherein in step 2), the small filament bundles are wound around the first drying roller and the second drying roller in this order with the number of winding cycles being not less than 10 weeks when being introduced into the drying unit.

9. The filament drying method according to claim 7, wherein in the step 2), the distance between adjacent tows is not less than 1cm when the tows are wound on the drying roller.

10. A filament drying process according to claim 7, wherein in step 3) the operating temperature of the drying unit is 98-150 ℃, preferably 98-130 ℃.