CN111041583A - Large-tow PAN (polyacrylonitrile) -based carbon fiber precursor mass and heat transfer device and method - Google Patents
Large-tow PAN (polyacrylonitrile) -based carbon fiber precursor mass and heat transfer device and method Download PDFInfo
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- CN111041583A CN111041583A CN201911364935.7A CN201911364935A CN111041583A CN 111041583 A CN111041583 A CN 111041583A CN 201911364935 A CN201911364935 A CN 201911364935A CN 111041583 A CN111041583 A CN 111041583A
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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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- 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
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/096—Humidity control, or oiling, of filaments, threads or the like, leaving the spinnerettes
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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
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
- D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
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Abstract
The invention provides a mass and heat transfer device and a method for large-tow PAN (polyacrylonitrile) -based carbon fiber precursors, wherein the mass and heat transfer device comprises a circulating water tank, a mass and heat transfer module and a circulating assembly; wherein: a flow divider is arranged in the circulating water tank, and guide roller sets are arranged at two ends of the circulating water tank; the mass and heat transfer module is fixed above the flow divider and is provided with a nozzle; and the circulating assembly is connected with the circulating water tank and the mass and heat transfer module and is used for conveying the bath liquid or the oiling agent in the circulating water tank to the mass and heat transfer module. Immersing the precursor fiber tows into a circulating water tank, and passing through the upper part of a splitter arranged in the circulating water tank; adjusting the distance between the mass and heat transfer module and the flow divider above the circulating water tank; the bath liquid or oil agent in the circulating water tank is conveyed to the mass and heat transfer module and is uniformly sprayed out from a nozzle on the mass and heat transfer module to penetrate through the tows. The invention improves the quality of the carbon fiber.
Description
Technical Field
The invention belongs to the field of carbon fiber production, and particularly relates to a mass and heat transfer device and method for large-tow PAN (polyacrylonitrile) -based carbon fiber precursors.
Background
The carbon fiber as a high and new technology material has the advantages of high strength, high modulus, low density, high temperature resistance, high electrical conductivity, thermal conductivity and the like, and is widely applied to the fields of aviation, automobiles, cultural and sports and the like. Polyacrylonitrile-based carbon fiber precursor is an important raw material for preparing carbon fiber, and the quality of precursor plays a decisive role in the quality of carbon fiber.
The preparation of the carbon fiber by the sodium thiocyanate one-step method generally adopts sodium thiocyanate as a solvent, acrylonitrile, a second monomer methyl acrylate and a third monomer itaconic acid as raw materials, and azobisisobutyronitrile as an initiator to carry out ternary polymerization reaction, and a polyacrylonitrile polymer solution is obtained after demonomerization and defoaming. And after metering, the polymerization stock solution enters a coagulation bath through a spinning nozzle to form primary fibers, the primary fibers are subjected to preheating treatment and drafting through a preheating bath, then enter water washing, and are subjected to processes of oiling, drying and the like to obtain carbon fiber precursors.
After the nascent fiber is solidified and formed in the coagulating bath, due to the action of double diffusion in the solidifying process, a part of solvent is remained in the fiber tows, the part of solvent is remained in solvent impurities in the tows, if the solvent impurities are not washed, the structure of the protofilament is affected in the subsequent process, and the quality of the carbon fiber is affected. Because the structure of nascent fiber is unstable, and intensity is lower moreover, therefore need further water bath draft and steam draft, when the water bath draft, water not only has the effect of further washing residual solvent, can also regard as the medium, plasticizes the fibre, is favorable to high power draft. After the drafting is finished, oiling treatment is carried out on the fiber tows, the oiling uniformity and consistency prevent the monofilaments from being adhered to each other, the surface friction between the monofilaments is reduced, and the fiber tows are dried and subjected to subsequent pre-oxidation.
The quality of the carbon fiber is directly influenced by the large-tow carbon fiber precursor due to the uneven washing drafting effect, uneven oiling of the precursor, unstable strength of the precursor and the like.
Disclosure of Invention
Features and advantages of the invention will be set forth in part in the description which follows, or may be obvious from the description, or may be learned by practice of the invention.
In order to overcome the problems in the prior art, the invention provides a mass and heat transfer device for large-tow PAN-based carbon fiber precursors, which comprises a circulating water tank, a mass and heat transfer module and a circulating assembly, wherein the circulating water tank is provided with a water inlet pipe and a water outlet pipe; wherein:
a flow divider is arranged in the circulating water tank, and guide roller sets are arranged at two ends of the circulating water tank;
the mass and heat transfer module is fixed above the flow divider and is provided with a nozzle;
and the circulating assembly is connected with the circulating water tank and the mass and heat transfer module and is used for conveying the bath liquid or the oiling agent in the circulating water tank to the mass and heat transfer module.
Optionally, the mass and heat transfer module is connected to the circulation component through a hose, the apparatus further includes a cylinder and a rotating arm, one end of the rotating arm is fixed to a piston rod of the cylinder, and the other end of the rotating arm is connected to the mass and heat transfer module.
Optionally, the spacing between the nozzle of the mass and heat transfer module and the flow divider is determined by an induction device.
Optionally, the circulation assembly comprises a filter, a mass and heat transfer circulation pump; the filter is arranged at the pipe orifice at the bottom of the circulating water tank, the other end of the filter is connected with the mass and heat transfer circulating pump through an inlet pipeline, and the mass and heat transfer circulating pump is connected with the mass and heat transfer module through an outlet pipeline.
Optionally, a first pressure transmitter and a flowmeter are arranged on the outlet pipeline.
Optionally, the filter comprises a first filter and a second filter connected with each other.
Optionally, the circulation assembly further comprises an outlet filter connected to the outlet end of the mass and heat transfer circulation pump, and the outlet end and the inlet end of the outlet filter are respectively provided with a first pressure transmitter and a second pressure transmitter.
Optionally, the nozzle of the mass and heat transfer module is a slit with adjustable width.
Optionally, the diverter comprises a semi-circular or arc-shaped tube having an axis perpendicular to the direction of travel of the tow.
The invention provides a mass and heat transfer method for a large-tow PAN (polyacrylonitrile) -based carbon fiber precursor, which is preferably carried out by adopting the device and comprises the following steps:
immersing the precursor fiber tows into a circulating water tank, and passing through the upper part of a splitter arranged in the circulating water tank;
adjusting the distance between the mass and heat transfer module and the flow divider above the circulating water tank;
the bath liquid or oil agent in the circulating water tank is conveyed to the mass and heat transfer module and is uniformly sprayed out from a nozzle on the mass and heat transfer module to penetrate through the tows.
The quality of the carbon fiber is directly influenced by the large-tow carbon fiber precursor due to the uneven washing drafting effect, uneven oiling of the precursor, unstable strength of the precursor and the like.
The mass and heat transfer device and the mass and heat transfer method for the large-tow PAN-based carbon fiber precursors have the advantages of uniform water washing drafting effect, uniform oiling of the precursors, stable strength of the precursors and improvement of the quality of the carbon fibers.
Drawings
Fig. 1 is a schematic structural diagram of a mass and heat transfer device for large tow PAN-based carbon fiber precursors, provided by an embodiment of the invention.
Fig. 2 is a schematic diagram of a flow divider and mass and heat transfer module of the mass and heat transfer device for large tow PAN-based carbon fiber strands shown in fig. 1.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
example 1:
as shown in fig. 1 and 2, the invention provides a mass and heat transfer device for large tow PAN-based carbon fiber precursors, which comprises a guide roller group 10, a circulating water tank 20, a flow divider 30, a circulating assembly and a mass and heat transfer module 50.
Wherein:
the guide roller sets 10 are two sets, respectively located at two ends of the circulating water tank 20, and are used for immersing the nascent fiber tows into the circulating water tank 20. The circulating water tank 20 is used for filling the water bath solution or the oil solution, and preferably, an overflow port is formed on the circulating water tank 20.
The flow divider 30 is arranged at the bottom of the circulating water tank 20, and the trickle passing through the nascent fiber tows is divided and buffered in the semicircular pipe, so that the exchange of the solvent and the heat in the fiber tows is accelerated forcibly. The shunt 30 in this embodiment is a semicircular tube shunt, and includes a semicircular tube 31, a fixing leg 33 located at the bottom of the semicircular tube 31, and a grid plate 35 disposed between the semicircular tube and the fixing leg. The semicircular pipe 31 is fixed to the bottom of the circulation water tank 20 by a fixing leg 33. The axial direction of the semicircular pipe diverter is perpendicular to the advancing direction of the tows. In general, the number of the semicircular tubes 31 may be set by itself, and is, for example, two. The semicircular tube may have other similar arc shapes.
The circulating component is connected with the circulating water tank 20 and the mass and heat transfer module 50 and is used for circulating the water bath solution or the oil agent in the circulating water tank 20. In this embodiment, the circulation unit includes a filter 41 and a mass and heat transfer circulation pump 42. The filter 41 is disposed at the bottom of the circulating water tank 20, and the other end is connected to the mass and heat transfer circulating pump 42 through an inlet pipe 61. The mass and heat transfer circulation pump 42 is connected to the mass and heat transfer module 50 through an outlet pipe. Optionally, a first pressure transmitter 43 and a flowmeter 44 are arranged on the outlet pipeline 62, and the flow range of the flowmeter is 0-25 m3/h。
The mass and heat transfer module 50 is arranged above the flow divider, and in the specific implementation, the mass and heat transfer circulating pump is a vertical centrifugal pump, the motor is a variable frequency motor, and the control unit of the mass and heat transfer device is controlled by a PLC. The mass and heat transfer module 50 has a nozzle 51 opposite the flow divider 30, and the spacing between the nozzle 51 of the mass and heat transfer module and the top of the semicircular tube flow divider is 30 mm. The fiber tows pass through the space between the mass and heat transfer module and the semicircular pipe diverter.
The nozzle of the mass and heat transfer module is a gap with adjustable width. In the embodiment, the mass and heat transfer module is provided with three nozzles, the gap between the nozzles is adjustable, and the adjustable range is 1-6 mm. More specifically, the three nozzles are three gaps formed by splicing 4 long strips, wherein the fixing bolt holes of the two long strips are long holes, and the distance between the long strips is adjusted through the positions of the fixing bolts, so that the size of the nozzle is adjusted.
Example 2:
unlike embodiment 1, in this embodiment, the filter 41 includes a first filter 47 and a second filter 48 connected to each other, that is, the water from the circulation water tank 20 needs to pass through the first filter 47 and the second filter 48 in sequence before entering the mass and heat transfer circulation pump 43. The first filter 47 and the second filter 48 have a filtering accuracy of 1000 to 3000 μm. The first filter is arranged at the bottom of the water tank and is a conical filter, and the first filter is low in filtering precision and used for filtering larger impurities and broken filaments. The second filter has higher filtering accuracy than the first filter and is used for filtering smaller impurities. The second filter is arranged on the pipeline and is a basket filter.
In this embodiment, two filters are provided, so that when one filter screen is cleaned, the other filter screen works to protect the pump.
Example 3:
unlike embodiment 1 or embodiment 2, in this embodiment, the circulation module includes an outlet filter 45, and the outlet filter 45 is connected to the outlet end of the mass and heat transfer circulation pump 42. The filtration precision of the outlet filter 45 is 400 to 600 μm. Preferably, a second pressure transmitter 46 is provided between the outlet filter 45 and the outlet end of the mass and heat transfer circulation pump 42, that is, in this case, the second pressure transmitter 46 is located at the inlet end of the outlet filter 45 and is a pre-filter pressure transmitter; the first pressure transmitter 43 is located at the outlet end of the outlet filter 45 and is a post-filter pressure transmitter.
In this embodiment, through the pressure differential of first pressure transmitter 43, second pressure transmitter 45 real-time detection filter, judge the filter jam condition, in time remind operating personnel to clear up the filter screen to when pressure is too high or low excessively, can control to stop the circulating pump, play the effect of protection circulating pump.
Example 4:
in addition to any of the above embodiments, in this embodiment, the mass and heat transfer module 50 is connected to the outlet pipe 62 by a hose 63, so that the mass and heat transfer module 50 can be operated up and down. Preferably, the mass and heat transfer device for the large tow PAN-based carbon fiber precursors further comprises an air cylinder 64, a piston rod of the air cylinder 64 is connected with the rotating arm 65, and the mass and heat transfer module 50 can be controlled to lift and lower through the air cylinder 64. The middle part of the rotating arm 65 is rotatably connected to the fulcrum, and the rotating arm 65 can move up and down around the fulcrum.
The distance between the nozzle 51 of the mass and heat transfer module and the top of the semicircular pipe shunt can be confirmed through an induction device, and the induction device detects the position of the cylinder stroke by utilizing an existing cylinder magnetic switch. The lowest position is the position where the nozzle is 30mm from the semicircular pipe diverter.
The invention filters the solution in the circulating water tank through the filter, and the solution is conveyed to the mass and heat transfer module through the mass and heat transfer circulating pump, the mass and heat transfer module grid distributes the circulating solution into uniform fine flow which is sprayed to penetrate through the fiber tows, and the fine flow penetrating through the tows is divided and buffered in the semicircular pipe, so that the exchange of the solvent and the heat in the fiber tows is accelerated forcibly.
Example 5:
the invention provides a mass and heat transfer method for a large tow PAN (polyacrylonitrile) -based carbon fiber precursor, which can be realized by adopting the mass and heat transfer device for the large tow PAN-based carbon fiber precursor provided by any embodiment of the invention, and comprises the following steps:
s1, preparing;
filling bath lotion or oil into the circulating water tank, opening the inlet valve of the mass and heat transfer circulating pump, and keeping in a standby state. Generally, fiber tows are firstly drafted in a water bath and then oiled, and the fiber tows can be divided into two circulating water tank sections.
And S2, immersing the precursor fiber tows in a circulating water tank, and passing the precursor fiber tows through the upper part of a splitter arranged in the circulating water tank.
During the specific operation, the position of the mass and heat transfer module can be lifted up by operating the lifting of the air cylinder,
and S3, adjusting the distance between the mass and heat transfer module and the flow divider above the circulating water tank.
When the precursor fiber tows are drawn or oiled through a water bath, the mass and heat transfer module is put down to be at the lowest position. In this embodiment, the position of the mass and heat transfer module is detected by the sensing device installed on the cylinder, and if the mass and heat transfer module is not at the lowest position, the control unit controls the mass and heat transfer module to be in place, so that the distance between the nozzle of the mass and heat transfer module and the top of the semicircular pipe diverter is 30 mm.
And S3, conveying the bath solution or oil solution in the circulating water tank to the mass and heat transfer module, and uniformly spraying the bath solution or oil solution from a nozzle on the mass and heat transfer module to penetrate through the filament bundle.
More specifically, the mass and heat transfer circulating pump is started to operate, an outlet valve of the circulating pump is opened, bath liquid or oiling agent is conveyed to the mass and heat transfer module through an outlet filter of the circulating pump, and the bath liquid or oiling agent is uniformly sprayed out from a nozzle on the mass and heat transfer module to penetrate through the tows. The bath solution or the oiling agent which passes through the fiber tows returns to the circulating water tank to finish the circulation.
In addition, the frequency of the circulating pump is automatically adjusted according to the given flow value, so that the output flow is ensured to be stable; meanwhile, the conditions of parameters including the position of the mass and heat transfer module, the pressure difference and the flow before and after the outlet filter of the circulating pump, the running signal of the circulating pump and the error signal of the frequency converter are continuously detected, and when the parameters are detected to have deviation, the control unit stops the circulating pump and generates an error message.
It should be noted that the start and stop of the circulating pump and the lifting of the mass and heat transfer module can be automatically controlled, or can be operated by a manual button, and the frequency of the circulating pump is adjusted by a potentiometer.
When the carbon fiber precursor is prepared by the sodium thiocyanate one-step method, low-power primary drafting is realized in a hot water bath, multistage serial drafting is adopted for hot water drafting, tension thinning is gradually applied, the filament bundle is uniformly stretched after water bath drafting, the number of broken filaments is not increased, and the fact that water bath drafting is in place can be judged.
The effects of the invention are illustrated below by specific examples and comparative examples:
the method for preparing the carbon fiber precursor by the sodium thiocyanate method generally adopts sodium thiocyanate as a solvent, and the nascent fiber formed by coagulation in a coagulation bath is drafted by a multistage serial water bath drafting circulating water tank and gradually applying tension for drafting. The fiber tows are drawn by the guide roller group, pass through the water bath drawing circulating water tank and are oiled.
In example 1: the water bath temperature of the circulating water tank is 65 ℃, the oiling temperature is 25 ℃, the mass and heat transfer module shown in the figure 1 is operated at the lowest position, the mass and heat transfer circulating pump is started, and the circulating flow is set to be 10m3And h, adjusting the nozzle gap of the mass transfer and heat transfer module to be 4mm, uniformly spraying the solution and the oiling agent in the circulating tank through the nozzles on the mass transfer and heat transfer module to penetrate through the fiber tows, spraying the washed fiber tows through the mass transfer and heat transfer module, analyzing and detecting the solvent content in the tows after water bath drafting to be 2.9%, and drying the tows to be 1.52%.
In example 2: the water bath temperature of the circulating water tank is 65 ℃, the oiling temperature is 25 ℃, the mass and heat transfer module shown in the figure 1 is operated at the lowest position, the mass and heat transfer circulating pump is started, and the circulating flow is set to be 15m3And h, adjusting the nozzle gap of the mass transfer and heat transfer module to be 4mm, uniformly spraying the solution and the oiling agent in the circulating tank through the nozzles on the mass transfer and heat transfer module to penetrate through the fiber tows, spraying the washed fiber tows through the mass transfer and heat transfer module, analyzing and detecting the solvent content in the tows after water bath drafting to be 2.4%, and drying the tows to be 1.67%.
In example 3, the water bath temperature of the circulating water tank is 85 ℃, the oiling temperature is 25 ℃, the mass and heat transfer module in the figure 1 is operated at the lowest position, the mass and heat transfer circulating pump is started, and the circulating flow is set to be 15m3And h, adjusting the nozzle gap of the mass transfer and heat transfer module to be 4mm, uniformly spraying the solution and the oiling agent in the circulating tank through the nozzles on the mass transfer and heat transfer module to penetrate through the fiber tows, spraying the washed fiber tows through the mass transfer and heat transfer module, analyzing and detecting the solvent content in the tows after water bath drafting to be 1.9%, and drying the tows to be 2.32%.
In example 4, the water bath temperature of the circulating water tank is 85 ℃, the oiling temperature is 25 ℃, the mass and heat transfer module in the figure 1 is operated at the lowest position, the mass and heat transfer circulating pump is started, and the circulating flow is set to be 15m3And h, adjusting the nozzle gap of the mass transfer and heat transfer module to be 1mm, uniformly spraying the solution and the oiling agent in the circulating tank through the nozzles on the mass transfer and heat transfer module to penetrate through the fiber tows, spraying the washed fiber tows through the mass transfer and heat transfer module, analyzing and detecting the solvent content in the tows after water bath drafting to be 1.4%, and drying the tows to be 2.76%.
In the comparative example, the water bath temperature of the circulating water tank is 85 ℃, the oiling temperature is 25 ℃, the mass transfer and heat transfer module is not used for spray washing, the solvent content in the tows after water bath drafting is 3.48 percent by analysis and detection, and the oil content of the tows after drying is 1.26 percent.
According to the mass transfer and heat transfer device and method for the large-tow PAN-based carbon fiber precursors, provided by the invention, the mass transfer and heat transfer device and method for the large-tow PAN-based carbon fiber precursors can effectively perform water bath drafting, washing and plasticizing, and are beneficial to high-power drafting.
The above-described embodiment is only one embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be easily made based on the application and principle of the present invention disclosed in the present application, and the present invention is not limited to the method described in the above-described embodiment of the present invention, so that the above-described embodiment is only preferred, and not restrictive.
Claims (10)
1. A mass and heat transfer device for large-tow PAN (polyacrylonitrile) -based carbon fiber precursors is characterized by comprising a circulating water tank, a mass and heat transfer module and a circulating component; wherein:
a flow divider is arranged in the circulating water tank, and guide roller sets are arranged at two ends of the circulating water tank;
the mass and heat transfer module is fixed above the flow divider and is provided with a nozzle;
and the circulating assembly is connected with the circulating water tank and the mass and heat transfer module and is used for conveying the bath liquid or the oiling agent in the circulating water tank to the mass and heat transfer module.
2. The mass and heat transfer device for the PAN-based carbon fiber precursors of large tows as claimed in claim 1, wherein the mass and heat transfer module is connected to the circulation module through a hose, the device further comprising a cylinder and a rotating arm, one end of the rotating arm is fixed to a piston rod of the cylinder, and the other end of the rotating arm is connected to the mass and heat transfer module.
3. The large tow PAN-based carbon fiber precursor mass and heat transfer device of claim 1, wherein the spacing between the nozzles of the mass and heat transfer module and the flow divider is determined by an induction device.
4. The large tow PAN-based carbon fiber precursor mass and heat transfer device of claim 1, wherein the circulation assembly comprises a filter, a mass and heat transfer circulation pump; the filter is arranged at the pipe orifice at the bottom of the circulating water tank, the other end of the filter is connected with the mass and heat transfer circulating pump through an inlet pipeline, and the mass and heat transfer circulating pump is connected with the mass and heat transfer module through an outlet pipeline.
5. The mass and heat transfer device for the large-tow PAN-based carbon fiber precursors as claimed in claim 4, wherein a first pressure transmitter and a flow meter are provided on the outlet pipe.
6. The large tow PAN-based carbon fiber precursor mass and heat transfer device of claim 4, wherein the filter comprises a first filter and a second filter in series.
7. The large tow PAN-based carbon fiber precursor mass and heat transfer device of claim 1, wherein the circulation assembly further comprises an outlet filter connected to an outlet end of the mass and heat transfer circulation pump, the outlet and inlet ends of the outlet filter being provided with a first pressure transducer and a second pressure transducer, respectively.
8. The mass and heat transfer device for the PAN-based carbon fiber strands of large tows as claimed in claim 1, wherein the nozzles of the mass and heat transfer modules are adjustable-width slits.
9. The large tow PAN-based carbon fiber precursor mass and heat transfer device of claim 1, wherein the flow splitter comprises a semi-circular or arc-shaped tube having an axis perpendicular to the direction of travel of the tow.
10. A mass and heat transfer method for large tow PAN-based carbon fiber strands, preferably using the apparatus of any one of claims 1 to 9, comprising:
immersing the precursor fiber tows into a circulating water tank, and passing through the upper part of a splitter arranged in the circulating water tank;
adjusting the distance between the mass and heat transfer module and the flow divider above the circulating water tank;
the bath liquid or oil agent in the circulating water tank is conveyed to the mass and heat transfer module and is uniformly sprayed out from a nozzle on the mass and heat transfer module to penetrate through the tows.
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Cited By (2)
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| CN111663192A (en) * | 2020-05-11 | 2020-09-15 | 浙江恒澜科技有限公司 | Device and method for controlling uniform stability of oil content of filament bundle during oiling of acrylic fibers |
| CN114959926A (en) * | 2022-04-29 | 2022-08-30 | 上海华峰超纤科技股份有限公司 | Drafting process of PET (polyethylene terephthalate) nascent fiber |
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