CN111394813B - Air treatment device in carbon fiber precursor production process and application thereof - Google Patents
Air treatment device in carbon fiber precursor production process and application thereof Download PDFInfo
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- CN111394813B CN111394813B CN202010200069.4A CN202010200069A CN111394813B CN 111394813 B CN111394813 B CN 111394813B CN 202010200069 A CN202010200069 A CN 202010200069A CN 111394813 B CN111394813 B CN 111394813B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D11/00—Other features of manufacture
- D01D11/02—Opening bundles to space the threads or filaments from one another
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/06—Washing or drying
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Abstract
The utility model provides an air treatment device in carbon fiber precursor production process and application thereof, belongs to chemical fiber production technical field, and extension finish life cycle reduces the finish and changes the frequency, improves precursor output and qualification rate, does benefit to the plastify effect of even and steam draft that oils, is favorable to improving precursor quality and homogeneity. The device comprises a workbench, a support, an air inlet pipe, an air transmission main pipe and air transmission branch pipes, wherein a retainer ring is arranged at the upper part of the support, the air transmission main pipe is horizontally arranged and clamped in the retainer ring, the lower part of the air transmission main pipe is communicated with the air inlet pipe, a plurality of air transmission branch pipes are arranged above the air transmission main pipe, the positions of the air transmission branch pipes correspond to the carbon fiber precursor production spinning position, an air blowing ring is arranged above the air transmission branch pipes, the inner cavity of the air blowing ring is communicated with the air transmission main pipe through the air transmission branch pipes, and an even number of air nozzles are uniformly distributed on the inner circumferential surface of the air blowing; the air treatment device is arranged at the position 0.5m-2m in front of the upper oil tank, and the air treatment device is arranged at the position 0.5m-2m in front of the steam drafting furnace.
Description
Technical Field
The invention belongs to the technical field of chemical fiber production, and particularly relates to an air treatment device in a carbon fiber precursor production process and application thereof.
Background
The carbon fiber is a high-performance special fiber, is widely applied to the key fields of aerospace and aviation and the like and the high-end civil field, forms a light and important novel material system nowadays, is still under strong development, and has larger market space and application prospect. In recent years, under the strong support of the country and the participation of a powerful enterprise, the carbon fiber business of China has made a long-term progress, but compared with developed countries, the product stability, reliability and economy are still not small. As a precursor fiber of high-performance carbon fiber, the quality of the precursor directly influences the quality of the carbon fiber, which is a bottleneck restricting the development of the carbon fiber, and the premise of preparing the high-performance and low-cost carbon fiber is to improve the quality and stability of the precursor and reduce the production cost of the precursor.
The production process flow of the carbon fiber precursor comprises coagulating bath, water washing, hot water drafting, oiling, drying densification, steam drafting, relaxation heat setting and filament collection. Wherein oiling has a critical impact on the production cost and quality of carbon fiber precursors. The temperature of the fiber is higher after hot water drafting, the fiber directly enters the oil tank for oiling, the oil temperature of the oil tank is improved, the corruption speed of the oil agent is accelerated, the oil agent is changed frequently, and the cost is higher. If the oil agent is organic silicon oil agent, the local oil agent is possibly subjected to cross-linking due to the fact that the temperature of the fiber is high after hot water drafting, the viscosity is greatly improved, a substance similar to an adhesive is formed, the substance is adhered to the fiber, the probability of winding and breaking is increased, and the performance of the fiber is affected. Secondly, the number of carbon fiber precursor is more in the production process, many spinning positions are produced simultaneously, and a bundle of fiber of every spinning position contains thousands of monofilaments, and the fiber is easy to be doubled, intertwined and twisted under the action of water impact, external forces such as draft roller tension and the like through coagulating bath, washing and hot water drafting processes, so that uniform fiber forming is influenced, the oiling effect is influenced, and the fiber strength and quality are influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the air treatment device in the production process of the carbon fiber precursor and the application thereof, so that the service cycle of the oil agent is prolonged, the replacement frequency of the oil agent is reduced, and the production cost of the precursor is reduced; the yarn breakage and winding caused by the accumulation of the viscose of the oiling agent are reduced, and the yield and the qualification rate of the protofilament are improved; blow the fiber under the action of compressed air, achieve the purpose of fiber opening, facilitate the oiling uniformity, and facilitate the improvement of the quality and performance index uniformity of the protofilament.
The design concept of the invention is as follows:
adopting an air treatment device to carry out air treatment on the fibers before oiling: the fiber contains more water after hot water drafting, the fiber passes through the center of the air blowing ring, and partial water on the fiber is blown off by utilizing compressed air, so that the dilution of the water to the oil agent is reduced, the oil agent adding amount of the oil agent is reduced, and the oil agent consumption is reduced; secondly, compressed air is blown to reduce the temperature of the fibers, reduce the heat brought into an upper oil tank, reduce the corruption speed of the oil agent, reduce the replacement frequency of the oil agent and prolong the service cycle of the oil agent; in addition, the fibers are blown away under the action of compressed air through the blowing ring, so that the fiber opening purpose is achieved, the oiling uniformity is improved, local overheating is avoided, the generation of adhesives is effectively inhibited, the phenomenon of adhesive accumulation on a dry densification hot roller is greatly reduced, the yarn breakage and yarn winding caused by adhesive yarn sticking are avoided, and the improvement on the quality and performance index uniformity of precursor fibers is facilitated.
The invention is realized by the following technical scheme.
The utility model provides an air treatment device in carbon fiber precursor production process, it includes workstation, support, intake pipe, gas transmission are responsible for and gas transmission branch pipe, wherein: the brackets are vertically and upwards arranged above the workbench in a linear shape, the upper parts of the brackets are provided with clamping rings, the gas transmission main pipe is horizontally arranged and clamped in the clamping rings, two ends of the gas transmission main pipe are respectively provided with a closed end, an opening below the middle section of the gas transmission main pipe is communicated with an air inlet pipe, a plurality of gas transmission branch pipes are arranged above the gas transmission main pipe, the positions of the gas transmission branch pipes correspond to the carbon fiber precursor production spinning position, gas blowing rings are arranged above the gas transmission branch pipes, fiber bundles pass through the centers of the gas blowing rings, the included angle between the end surfaces of the gas blowing rings and the fiber bundle conveying direction is more than or equal to 90 degrees and less than 180 degrees, the gas blowing rings are hollow circular rings, the inner cavities of the gas blowing rings are communicated with the gas transmission main pipe through the gas transmission branch pipes, the upper ends of the gas blowing rings are provided with flow guide notches, the width of the flow guide notches is 1-15, the aperture of the air nozzle is 0.5-2.5mm, and the blowing angle of the air nozzle is adjusted by adjusting the angle of the air transmission main pipe in the clamping ring.
Further, the air blowing ring, the air delivery branch pipe and the air delivery main pipe are integrally formed, or the lower end of the air delivery branch pipe is in threaded connection with the air delivery main pipe, and the air inlet pipe is made of a hose.
Furthermore, the diameter of the inner circle of the air blowing ring is 3-30mm, and the diameter of the outer circle of the air blowing ring is 4-40 mm; the diameter of the gas transmission branch pipe is 1-20 mm.
Further, the air treatment device is arranged in front of the upper oil tank in the oiling process.
Further, the distance between the air treatment device and the upper oil groove is determined according to the fiber conveying speed and the fiber tension, and the height of the air blowing ring in the air treatment device is determined according to the height of the upper oil groove, so that the fiber bundle can pass through the center of the circle center of the air blowing ring.
Further, the air treatment device is arranged at a position 0.5m-2m in front of the upper oil tank.
An application of an air treatment device in a carbon fiber precursor production process is as follows: in the production process of carbon fiber precursors, the air treatment device is arranged at a position 0.5m-2m in front of an upper oil groove in an oiling process, the height of an air blowing ring in the air treatment device is determined according to the height of the upper oil groove, and the air treatment device carries out air treatment on fiber bundles before oiling; the fiber bundle passes through the center of the blowing ring, the included angle between the end face of the blowing ring and the conveying direction of the fiber bundle is more than or equal to 90 degrees and less than 180 degrees, and compressed air blown out of each air jet of the blowing ring uniformly acts on the fiber bundle.
Furthermore, the blowing speed of the compressed air blown out from the air nozzle is adjusted by adjusting the blowing quantity of the air inlet pipe, and the blowing speed is adjusted according to the fiber conveying speed, the fiber tension and the distance from the upper oil groove, so that the bundled fiber bundles are blown away and stably run, the purpose of carding the fiber bundles is achieved, and the phenomena of branching and fuzzing are not caused.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an air treatment device in a carbon fiber precursor production process and application thereof, which are suitable for air treatment of fibers before oiling in the carbon fiber precursor production process. The dilution of water to the oil agent is reduced, the oil agent adding amount for oiling is reduced, and the oil agent consumption is reduced; the heat brought into the upper oil tank is reduced, the corruption speed of the oil agent is reduced, the replacement frequency of the oil agent is reduced, and the service cycle of the oil agent is prolonged; the purpose of fiber opening is achieved, oiling is facilitated to be uniform, local overheating is avoided, generation of adhesives is effectively inhibited, the phenomenon that viscose is accumulated on a drying densification hot roller is greatly reduced, yarn breakage and yarn winding caused by viscose yarn sticking are avoided, and improvement of the quality and performance index uniformity of precursor fibers is facilitated.
Drawings
FIG. 1 is a schematic view of a front view semi-section structure of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is a schematic view of a partially enlarged structure of the assembly position of the blowing ring and the gas transmission branch pipe.
In the figure, 1 is a workbench, 2 is a bracket, 3 is a main gas transmission pipe, 4 is a clamping ring, 5 is a branch gas transmission pipe, 6 is a gas blowing ring, 7 is a gas nozzle, 8 is a flow guide notch, and 9 is a gas inlet pipe.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. Unless otherwise specified, the examples follow conventional experimental conditions. In addition, it will be apparent to those skilled in the art that various modifications or improvements can be made to the material components and amounts in these embodiments without departing from the spirit and scope of the invention as defined in the appended claims.
Example one
As shown in fig. 1 to fig. 3, the air treatment device provided in this embodiment is applied to wet spinning of polyacrylonitrile-based carbon fiber precursor.
The lower end of the gas transmission branch pipe 5 is tightly wound with the raw material belt and then is in butt joint with a corresponding threaded port of the gas transmission main pipe 3, the gas transmission main pipe 3 is fixed on the workbench 1 through the support 2 and the clamping ring 4, the diameter of the gas transmission main pipe 3 is 20mm, the lower part of the gas transmission main pipe 3 is connected with the gas inlet pipe 9, and ports at two ends of the gas transmission main pipe 3 are closed. The diameter of the inner circle of the air blowing ring 6 is 10mm, the diameter of the outer circle is 15mm, 8 air nozzles 7 are uniformly distributed on the periphery of the inner circle, and the aperture of each air nozzle 7 is 1 mm. The upper end of the air blowing ring 6 is provided with a flow guiding notch 8, the width of the flow guiding notch 8 is 2mm, the lower part of the air blowing ring 6 is connected with an air transmission branch pipe 5, and the diameter of the air transmission branch pipe 5 is 10 mm.
After the air treatment device provided by the embodiment is installed, the filament receiving speed is set to be 80m/min, the air treatment device is respectively placed at the position 0.5m before the oiling process, the center position of a blowing ring of the air treatment device before oiling is consistent with the filament moving height of fibers before oiling, the fibers are ensured to pass through the center of the blowing ring, the angle between the blowing ring and the running direction of the fibers is 120 degrees, compressed air is introduced through an air inlet pipe 9, the compressed air blown out from each air nozzle 7 on the inner circular surface of the blowing ring 6 uniformly acts on the fibers, the speed of the compressed air in the air inlet pipe 9 is adjusted to be 30m/min, the bundled fiber bundles are blown away and stably run, the purpose of carding the fiber bundles is achieved, and the phenomena of branching and fuzzing are not caused.
The air treatment device provided by the embodiment is used for carrying out wet spinning on the polyacrylonitrile-based carbon fiber precursor, the using period of the oiling agent is more than or equal to 40 days, the cleaning frequency of a drying densification hot roller is 1 time/(30-40) days, the oiling rates CV values of the precursor on the same spinning position and different spinning positions are less than 5% in the long range of the precursor, the precursor has no obvious broken filaments, and the uniformity of performance indexes is good.
Example two
As shown in fig. 1 to fig. 3, the air treatment device provided in the second embodiment is applied to dry-jet wet spinning of polyacrylonitrile-based carbon fiber precursor.
The gas transmission branch pipe 5, the gas transmission main pipe 3 and the blowing ring 6 are integrally formed, the gas transmission main pipe 3 is fixed on the workbench 1 through the support 2 and the clamping ring 4, the diameter of the gas transmission main pipe 3 is 25mm, the lower part of the gas transmission main pipe 3 is connected with the gas inlet pipe 9, and the two end ports of the gas transmission main pipe 3 are closed. The diameter of the inner circle of the air blowing ring 6 is 15mm, the diameter of the outer circle is 20mm, 10 air nozzles 7 are uniformly distributed on the periphery of the inner circle, and the aperture of each air nozzle 7 is 1 mm. The upper end of the air blowing ring 6 is provided with a flow guiding notch 8, the width of the flow guiding notch 8 is 4mm, the lower part of the air blowing ring 6 is connected with an air transmission branch pipe 5, and the diameter of the air transmission branch pipe 5 is 15 mm.
After the air treatment device provided by the second embodiment is installed, the filament receiving speed is set to be 100m/min, the air treatment device is respectively placed at the position 1m before the oiling process, the central position of a blowing ring of the air treatment device before oiling is consistent with the filament moving height of fibers before oiling, the fibers are ensured to pass through the center of the blowing ring, the angle between the blowing ring and the fiber moving direction is 95 degrees, compressed air is introduced through an air inlet pipe 9, the compressed air blown out from each air nozzle 7 on the inner circular surface of the blowing ring 6 uniformly acts on the fibers, the compressed air speed of the air inlet pipe 9 is adjusted to be 25m/min, the bundled fiber bundles are blown away and stably run, the purpose of carding the fiber bundles is achieved, and the phenomena of branching and fuzzing are not caused.
The air treatment device provided by the second embodiment is used for spinning polyacrylonitrile-based carbon fiber precursors by a dry-jet wet method, the using period of an oiling agent is more than or equal to 40 days, the cleaning frequency of a dry densification hot roller is 1 time/(30-40) days, the oiling rate CV values of the precursors at different spinning positions on the long range of the same spinning position are less than 5%, the precursors have no obvious broken filaments, and the uniformity of performance indexes is good.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. The utility model provides an air treatment device in carbon fiber precursor production process, it includes workstation (1), support (2), intake pipe (9), gas transmission main pipe (3) and gas transmission branch pipe (5), its characterized in that: the plurality of brackets (2) are vertically and upwards arranged above the workbench (1) in a linear shape, the upper part of each bracket (2) is provided with a clamping ring (4), the gas transmission main pipe (3) is horizontally arranged and clamped in the clamping ring (4), two ends of the gas transmission main pipe (3) are both provided with closed ends, an opening below the middle section of the gas transmission main pipe (3) is communicated with an air inlet pipe (9), the upper part of the gas transmission main pipe (3) is provided with a plurality of gas transmission branch pipes (5), the positions of the gas transmission branch pipes (5) correspond to the carbon fiber precursor production spinning position, the upper part of the gas transmission branch pipes (5) is provided with an air blowing ring (6), a fiber bundle passes through the center of the air blowing ring (6), the included angle between the end surface of the air blowing ring (6) and the fiber bundle conveying direction is larger than 90 degrees and smaller than 180 degrees, the air blowing ring (6) is provided with a hollow circular ring, the inner cavity of the air blowing ring (6), the upper end of the air blowing ring (6) is provided with a flow guiding notch (8), the width of the flow guiding notch (8) is 1-15mm, an even number of air nozzles (7) are uniformly distributed on the inner circular surface of the air blowing ring (6) along the circumferential direction, the aperture of each air nozzle (7) is 0.5-2.5mm, and the air blowing angle of each air nozzle (7) is adjusted by adjusting the angle of the air transmission main pipe (3) in the clamping ring (4).
2. The air treatment device in the production process of carbon fiber precursors, according to claim 1, is characterized in that: the air blowing ring (6), the air delivery branch pipe (5) and the air delivery main pipe (3) are integrally formed, or the lower end of the air delivery branch pipe (5) is in threaded connection with the air delivery main pipe (3), and the air inlet pipe (9) is made of a hose.
3. The air treatment device in the production process of carbon fiber precursors, according to claim 1, is characterized in that: the diameter of the inner circle of the air blowing ring (6) is 3-30mm, and the diameter of the outer circle of the air blowing ring is 4-40 mm; the diameter of the gas transmission branch pipe (5) is 1-20 mm.
4. The air treatment device in the production process of carbon fiber precursors, according to claim 1, is characterized in that: the air treatment device is arranged in front of the oil feeding groove in the oiling process.
5. The air treatment device in the production process of the carbon fiber precursor, according to claim 4, is characterized in that: and determining the distance between the air treatment device and the upper oil groove according to the fiber conveying speed and the fiber tension, and determining the height of an air blowing ring in the air treatment device according to the height of the upper oil groove.
6. The air treatment device in the carbon fiber precursor production process according to claim 4 or 5, wherein: the air treatment device is arranged at the position 0.5m-2m in front of the upper oil tank.
7. The use of an air treatment device in a carbon fiber precursor production process according to claim 1, wherein: in the production process of carbon fiber precursors, the air treatment device is arranged at a position 0.5m-2m in front of an upper oil groove in an oiling process, the height of an air blowing ring in the air treatment device is determined according to the height of the upper oil groove, and the air treatment device carries out air treatment on fiber bundles before oiling; the fiber bundle passes through the center of the blowing ring (6), the included angle between the end surface of the blowing ring (6) and the conveying direction of the fiber bundle is more than 90 degrees and less than 180 degrees, and compressed air blown out of each air jet (7) of the blowing ring (6) uniformly acts on the fiber bundle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010200069.4A CN111394813B (en) | 2020-03-20 | 2020-03-20 | Air treatment device in carbon fiber precursor production process and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010200069.4A CN111394813B (en) | 2020-03-20 | 2020-03-20 | Air treatment device in carbon fiber precursor production process and application thereof |
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| CN111394813A CN111394813A (en) | 2020-07-10 |
| CN111394813B true CN111394813B (en) | 2021-06-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451755A (en) * | 2013-08-31 | 2013-12-18 | 连云港鹰游纺机有限责任公司 | Air handling unit used for carbon fiber precursors |
| CN203411674U (en) * | 2013-08-31 | 2014-01-29 | 连云港鹰游纺机有限责任公司 | Air handling unit for carbon fiber precursors |
| CN109355721A (en) * | 2018-11-13 | 2019-02-19 | 中安信科技有限公司 | Polyacrylonitrile-based carbon fibre dry-jet wet-spinning precursor moisture content removal device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6620503B2 (en) * | 2000-07-26 | 2003-09-16 | Kimberly-Clark Worldwide, Inc. | Synthetic fiber nonwoven web and method |
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- 2020-03-20 CN CN202010200069.4A patent/CN111394813B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451755A (en) * | 2013-08-31 | 2013-12-18 | 连云港鹰游纺机有限责任公司 | Air handling unit used for carbon fiber precursors |
| CN203411674U (en) * | 2013-08-31 | 2014-01-29 | 连云港鹰游纺机有限责任公司 | Air handling unit for carbon fiber precursors |
| CN109355721A (en) * | 2018-11-13 | 2019-02-19 | 中安信科技有限公司 | Polyacrylonitrile-based carbon fibre dry-jet wet-spinning precursor moisture content removal device and method |
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