CN112708950A - Fiber gas drying device and fiber gas drying method - Google Patents
Fiber gas drying device and fiber gas drying method Download PDFInfo
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- CN112708950A CN112708950A CN202011424369.7A CN202011424369A CN112708950A CN 112708950 A CN112708950 A CN 112708950A CN 202011424369 A CN202011424369 A CN 202011424369A CN 112708950 A CN112708950 A CN 112708950A
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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 invention provides a fiber gas drying device and a fiber gas drying method, and belongs to the technical field of textile machinery. The device comprises a drying box, a plurality of air cylinders, an air source and an exhaust hole; a plurality of air cylinders are arranged on one side wall of the drying box, so that the air cylinders are parallel to each other; the path of the fibers to be dried extends in the radial direction of the plurality of cylinders; blowing the air source to the fiber to be dried after the air source passes through the air cylinder; one end of the exhaust hole is communicated with the containing space in the drying box, and the other end of the exhaust hole is communicated with the outside. The method comprises the following steps: pressurizing and stabilizing the spinning solution to obtain uniform spinning solution; extruding the uniform spinning solution from a spinneret orifice to form a spinning trickle; solidifying and molding the spinning trickle to obtain wet fiber; after the wet fibers are dried by the device, dry tows are obtained. The device and the method are environment-friendly and low in energy consumption, and the residual quantity of the obtained fiber solvent is less than 100 ppm.
Description
Technical Field
The invention relates to the technical field of textile machinery, in particular to a fiber gas drying device and a fiber gas drying method.
Background
During the preparation, shaping or dyeing of the fibres, a large amount of liquid such as solvents or coagulation baths is often required, which eventually needs to be removed to obtain dry finished fibres. In order to remove these liquids, the conventional process is realized by using a heat drying method. Heating and drying often require bulky equipment and a large amount of heat, causing environmental pollution and increased energy consumption. Therefore, there is a need for an environmentally friendly drying apparatus with low energy consumption.
Disclosure of Invention
In view of this, the present invention provides a fiber gas drying apparatus and a fiber gas drying method, which are environmentally friendly and have low energy consumption, thereby being more practical.
In order to achieve the first object, the present invention provides a fiber gas drying apparatus, comprising:
the fiber gas drying device provided by the invention comprises a drying box (1), a plurality of air cylinders (23), an air source (12) and an exhaust hole (6);
the plurality of air cylinders (23) are disposed on one side wall of the drying cabinet (1) such that the plurality of air cylinders (23) are parallel to each other;
the path of the fibres (8) to be dried extends in a radial direction of the cylinders (23);
the air source (12) blows towards the fiber to be dried after passing through the air cylinder (23);
one end of the exhaust hole (6) is communicated with the accommodating space in the drying box (1), and the other end of the exhaust hole is communicated with the outside.
The fiber gas drying device provided by the invention can be further realized by adopting the following technical measures.
Preferably, the gas cylinder (23) comprises a gas cylinder body (2), a gas distribution mechanism (3) and a gas damping rod (4),
the gas distribution mechanism (3) is axially arranged on the inner wall of the gas cylinder body (2), so that the inner cavity of the gas cylinder body (2) is divided into a first accommodating space (14) and a second accommodating space (24) by the gas distribution mechanism (3);
the gas distribution mechanism (3) is provided with a through hole (13) so that the first accommodating space (14) is communicated with the second accommodating space (24);
a slit (7) is axially arranged on the air cylinder body (2), so that the second accommodating space (24) is communicated with the outside through the slit (7);
the gas damping rod (4) is limited in the second accommodating space (24);
wherein the first accommodating space (14) is communicated with the gas source (12);
the fiber (8) to be dried is arranged above the slit (7).
Preferably, the diameter of the gas damping rod (4) is larger than the size of the through hole (13), the diameter of the gas damping rod (4) is larger than the size of the slit (7), and the diameter of the gas damping rod (4) is smaller than the distance between the through hole (13) and the slit (7), so that the gas damping rod (4) is limited in the second accommodating space (24).
Preferably, the inner wall of the gas cylinder body (2) is provided with flanges at symmetrical positions along the axial direction at positions close to the slits (7), and the inner side shapes of the flanges are matched with the shapes of the outer side surfaces of the damping rods (4) in the axial direction.
Preferably, the gas cylinder (23) further comprises a first blocking end (18) and a second blocking end (19), the first blocking end (18) is blocked at one end of the gas cylinder body (2); the second plugging end (19) is plugged at the other end of the air cylinder body (2); so that an inner cavity of the gas cylinder body (2) is formed among the gas cylinder body (2), the first blocking end (18) and the second blocking end (19).
Preferably, the first blocking end (18) is detachably connected with the gas cylinder body (2); the second plugging end (19) is detachably connected with the air cylinder body (2).
Preferably, the fiber gas drying device further comprises a connecting strip (9),
a fiber passage (22) is arranged between the connecting strip (9) and the inflator body (2);
the path of the fibers (8) to be dried extends in the direction of the fiber passage (22).
Preferably, only one end of the connecting strip (9) is connected to one end of the gas cylinder body (2), and the other end of the connecting strip (9) is arranged in an open manner.
Preferably, the open end (20) of the connecting strip (9) is inclined upwards.
Preferably, an upward bulge (21) is arranged at one end of the connecting strip (9) connected with the air cylinder body (2).
Preferably, the width of the slit (7) ranges from 0.5mm to 10 mm.
Preferably, the material of the gas damping rod (4) is selected from one of stainless steel, ceramic, polytetrafluoroethylene and polyethylene.
Preferably, the gas damping rod (4) is a solid rod or a hollow rod.
Preferably, the joint between the gas distribution mechanism (3) and the inner wall of the gas cylinder body (2) is in a round transition.
Preferably, the fiber gas drying device further comprises a gas pipe (11), one end of the gas pipe (11) is communicated with the gas source (12), and the other end of the gas pipe (11) is communicated with the inner cavity of the gas cylinder (23) through a gas inlet pipe (5) arranged on the gas cylinder (23).
Preferably, the gas is selected from one or more mixed gases of air, nitrogen, water vapor, carbon dioxide and inert gas.
In order to achieve the second object, the invention provides a fiber gas drying method, which comprises the following steps:
the fiber gas drying method provided by the invention comprises the following steps:
pressurizing and stabilizing the spinning solution to obtain uniform spinning solution;
extruding the uniform spinning solution from a spinneret orifice to form a spinning trickle;
solidifying and forming the spinning trickle to obtain wet fibers;
the wet fibers are dried by the fiber gas drying device provided by the invention to obtain dry tows.
The fiber gas drying method provided by the invention can be further realized by adopting the following technical measures.
Preferably, the value of the gas pressure in the drying box (1) ranges from 0.1MPa to 0.6 MPa.
Preferably, the value range of the gas temperature in the drying box (1) is 10-150 ℃.
Preferably, during the step of solidifying and forming the spinning stream to obtain the wet fiber, the solidifying and forming mode is selected from one of gas solidification, liquid solidification and combined solidification of gas and liquid.
Preferably, in the step of obtaining the wet fiber by solidifying and forming the spinning stream, when the temperature of the spinneret surface needs to be protected, the spinneret surface and the coagulation bath liquid are separated by an air gap.
Preferably, during the step of solidifying and forming the spinning stream to obtain the wet fiber, the solidifying and forming mode is gas solidifying, and during the gas solidifying process, the blowing mode is selected from one of gas cross blowing and gas circular blowing.
According to the fiber gas drying device and the fiber gas drying method provided by the embodiment of the invention, the wet fibers are directly contacted by gas, the tow liquid is efficiently and quickly blown off, and even the liquid which is not easy to volatilize is easily taken away by the airflow, so that the aim of desolventizing and drying is fulfilled.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic view of the overall structure of a fiber gas drying apparatus according to an embodiment of the present invention;
fig. 2 is a schematic view, partially in section, showing the structure of a gas cylinder used in the fiber gas drying apparatus according to the embodiment of the present invention;
FIG. 3 is a schematic view of a fiber gas drying apparatus according to an exemplary embodiment of the present invention in a typical orientation;
FIG. 4 is a sectional view taken along line H-H of FIG. 3 in accordance with the present invention;
FIG. 5 is a schematic view of a fiber gas drying apparatus according to an embodiment of the present invention in another exemplary orientation;
FIG. 6 is a flow chart of steps of a method for drying fiber gas according to an embodiment of the present invention.
Detailed Description
In view of this, the present invention provides a fiber gas drying apparatus and a fiber gas drying method, which are more practical.
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of a fiber gas drying device and a fiber gas drying method according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, with the specific understanding that: both a and B may be included, a may be present alone, or B may be present alone, and any of the three cases can be provided.
Fiber gas drying apparatus embodiment
Referring to fig. 1 to 5, the fiber gas drying apparatus provided by the present invention includes a drying box 1, a plurality of gas cylinders 23, a gas source 12, and a gas exhaust hole 6. The plurality of air cylinders 23 are provided on one side wall of the drying cabinet 1 such that the plurality of air cylinders 23 are parallel to each other. The path of the fibres 8 to be dried extends in the radial direction of the plurality of cylinders 23. After passing through the air cylinder 23, the air source 12 blows toward the fiber to be dried. One end of the exhaust hole 6 is communicated with the containing space in the drying box 1, and the other end of the exhaust hole is communicated with the outside.
In the prior art, in the step process of drying wet fibers to remove liquid to obtain dry tows, the wet fibers obtained by curing and forming are complex in components. Removal of the liquid from the wet fiber can be accomplished in a variety of ways. When the liquid contained in the wet fiber is a volatile component, the fiber desolventizing can be realized in a heating mode, and the dry fiber is obtained; when the liquid contained in the wet fiber is a non-volatile solvent component, the non/non-volatile solvent can be extracted in an extraction mode, and the wet fiber containing the volatile extracting agent is subjected to drying and heating in a box to remove the extracting agent, so that the dry fiber is obtained. In the current industrialized implementation route, huge drying hot boxes and continuous heat are needed no matter the organic solvent is removed by direct heating or the nonvolatile organic solvent is extracted by the extracting agent, and then the extracting agent is removed by heating to obtain dry tows. In addition, in the industrial implementation process, the requirement on the sealing performance of equipment is high, otherwise, the equipment is easy to leak, and the environment is damaged. According to the fiber gas drying device and the fiber gas drying method provided by the embodiment of the invention, the wet fibers are directly contacted by gas, the tow liquid is efficiently and quickly blown off, and even the liquid which is not easy to volatilize is easily taken away by the airflow, so that the aim of desolventizing and drying is fulfilled.
Wherein the gas cylinder 23 comprises a cylinder body 2, a gas distribution mechanism 3 and a gas damper rod 4. The gas distributing mechanism 3 is axially disposed on the inner wall of the cylinder body 2 so that the inner cavity of the cylinder body 2 is partitioned into a first accommodating space 14 and a second accommodating space 24 by the gas distributing mechanism 3. The gas distribution mechanism 3 is provided with a through hole 13 so that the first accommodation space 14 and the second accommodation space 24 are communicated with each other. The cylinder body 2 is provided with a slit 7 in an axial direction so that the second receiving space 24 communicates with the outside through the slit 7. The gas damping rod 4 is confined in the second accommodation space 24. Wherein, the first accommodating space 14 is communicated with the air source 12. The fiber to be dried 8 is arranged above the slit 7. In this embodiment, the diameter of the gas damping rod 4 is larger than the size of the through hole 13, the diameter of the gas damping rod 4 is larger than the size of the slit 7, and the diameter of the gas damping rod 4 is smaller than the distance between the through hole 13 and the slit 7, so that the gas damping rod 4 is limited in the second accommodating space 24. The gas distribution mechanism 3 means that gas enters the gas cylinder, the gas damping rod 4 is arranged above the gas distribution mechanism 3, and the surface of the gas outlet of the gas distribution mechanism 3 is matched with the surface of the gas damping rod 4 to form a uniform gas channel. In order to obtain a uniform and stable gas flow, after the gas enters the gas injection gap of the gas distribution mechanism 3 and is injected, the gas flow can drive the gas damping rod 4 to rotate and ascend and is matched with the slit 7 on the gas cylinder body 2, so that the size and the pressure of the gas flow are adjusted. The speed and pressure of the ejected gas can be adjusted by adjusting the flow rate and pressure of the gas at the gas inlet or the diameter of the gas damping rod 4.
Flanges are arranged on the inner wall of the air cylinder body 2 at positions close to the slits 7 and are symmetrical along the axial direction, and the inner side shape of each flange is matched with the shape of the outer side surface of the damping rod 4 in the axial direction. In this case, the pressure of the gas flowing out of the slit 7 can be more conveniently restricted.
Wherein the gas cartridge 23 further comprises a first 18 and a second 19 closed end. The first plugging end 18 is plugged at one end of the gas cylinder body 2; the second plugging end 19 is plugged at the other end of the air cylinder body 2; so that an inner cavity of the gas cylinder body 2 is formed between the gas cylinder body 2, the first closed end 18 and the second closed end 19.
Wherein the first plugging end 18 is detachably connected with the gas cylinder body 2; the second closure end 19 is detachably connected to the cylinder body 2. In this case, it is possible to facilitate the removal of the gas damping rod 4 from the cylinder body 2 or the fitting of the gas damping rod 4 into the cylinder body 2.
Wherein the fibre gas drying device further comprises a connecting strip 9. The connecting strip 9 is provided with a fiber passage 22 between the cylinder body 2. The path of the fibers 8 to be dried extends in the direction of the fiber passage 22. In this case, the fiber 8 to be dried is disposed through the fiber passage 22, so that the degree of fitting between the fiber 8 to be dried and the slit 7 can be made higher, and the drying effect of the fiber 7 to be dried is better.
Wherein, only one end of the connecting strip 9 is connected with one end of the inflator body 2, and the other end of the connecting strip 9 is arranged in an opening way. So that the fibers 8 to be dried more penetrate into the gas passage 22 between the connecting strip 9 and the outer wall of the cylinder body 2.
Wherein the open end 20 of the connecting strip 9 is inclined upwards. Thereby facilitating penetration of the fibres 8 to be dried into the gas passage 22 between the connecting strip 9 and the outer wall of the cylinder body 2. Thereby facilitating the connection between the first capped end 18 and the cylinder body 2.
Wherein, one end of the connecting strip 9 connected with the inflator body 2 is provided with an upward bulge 21. Thereby facilitating the connection between the second capped end 19 and the cylinder body 2.
Wherein the width of the slit 7 ranges from 0.5mm to 10 mm. The width of the slit 7 is limited to be 0.5mm-10mm, so as to ensure that the gas source can smoothly enter the gas cylinder body 2, and simultaneously ensure that a certain flow velocity and flow can blow the gas damping rod 4 to ascend or descend so as to adjust the size of the gas flow. When the width of the slit 7 is larger than 10mm, the air flow is too large, the air damping rod 4 is directly blown to be tightly combined with the slit 7, and the air flow resistance is large. When the width of the air gap is less than 0.5mm, the air flow is insufficient, the air damping rod 4 is not blown up, the air flow is too small, and the drying purpose is not achieved.
Wherein, the material of the gas damping rod 4 is selected from one of stainless steel, ceramic, polytetrafluoroethylene and polyethylene.
Wherein, the gas damping rod 4 is a solid rod or a hollow rod.
Wherein, the joint between the gas distribution mechanism 3 and the inner wall of the gas cylinder body 2 is in fillet transition. In this case, stress concentration at the joint between the gas distributing mechanism 3 and the inner wall of the gas cylinder body 2 can be avoided, thereby extending the service life of the fiber gas drying device provided by the embodiment of the present invention.
The fiber gas drying device also comprises a gas pipe 11, one end of the gas pipe 11 is communicated with a gas source 12, and the other end of the gas pipe 11 is communicated with the inner cavity of the gas cylinder 23 through a gas inlet pipe 5 arranged on the gas cylinder 23. In this case, before the dry gas enters the inner cavity of the gas cylinder 23, the dry gas can be buffered by the gas pipe 11, so that the technical problem of sudden pressure change caused by the dry gas rushing into the inner cavity of the gas cylinder 23 is solved, and the service life of the fiber gas drying device provided by the embodiment of the invention is prolonged.
Wherein the gas is selected from one or more mixed gases of air, nitrogen, water vapor, carbon dioxide and inert gas. The gas used is directly related to the state of the wet fibers and the solvent contained in the wet fibers. When the solvent of the wet fibre is sensitive to oxygen or is susceptible to other unwanted reactions, i.e. preferably nitrogen. The gas is preferably air, as the wet fibres are not sensitive to gases, in particular the presence of oxygen does not affect the quality of the fibres or the safety of production.
Examples of fiber gas drying methods
Referring to fig. 6, a fiber gas drying method according to an embodiment of the present invention includes the steps of:
step S1: and pressurizing and stabilizing the spinning solution to obtain uniform spinning solution. Wherein the spinning dope is a multicomponent comprising at least one solvent. The spinning solution can have certain power to form stable pipeline pressure through pressurization, and meanwhile, the spinning solution can be stabilized in a certain range after the pressure is increased, so that uneven spinning caused by large fluctuation of the pressure is avoided. According to the technical scheme, the solution is pressurized and stabilized to push the spinning solution to be extruded from the spinneret orifice to obtain the spinning stream, the spinning stream is not completely solidified at the moment, a large amount of solvent is contained, and the external environment fluctuation has obvious influence on the forming structure of the spinning stream.
Step S2: extruding the uniform spinning solution from a spinneret orifice to form a spinning trickle;
step S3: solidifying and molding the spinning trickle to obtain wet fiber; the solution spinning stream extruded from the spinneret maintains the stability of the macromolecular extended chain structure and prevents back-winding, needs to be rapidly solidified to obtain fibrous tows, and does not have agglomeration and fracture phenomena. At present, there are various ways to realize solidification, and the technical scheme can be realized by adopting a gas, liquid or gas-liquid combined way. When the spinning stream from the spinneret is sensitive to temperature, or the spinning stream can be phase-separated due to temperature change, solidification of the spinning stream can be realized in a gas cooling mode. In this embodiment, when the spinning trickle solidification molding is realized by using gas, the blowing mode is preferably one of gas cross blowing and circular blowing. When the spinning stream from the spinneret needs to be subjected to double diffusion or chemical change, the spinning solution composition or structure is changed, and a liquid coagulating bath is adopted. Typically, the orifice assembly is immersed in a liquid coagulation bath and the spinning stream is just extruded from the orifice of the orifice, i.e., in contact with the coagulation bath. At this time, the temperature of the coagulation bath is equal to or slightly different from the temperature of the spinneret assembly, so that the influence of the temperature of the coagulation bath on the spinneret assembly is avoided. The spinning stream structure changes from the moment the spinning stream contacts the coagulation bath, forming a more stable solid structure. The spinning trickle contacts with the coagulating bath, and the two-component diffusion is frequently generated, so that a solid structure with a more stable structure is formed. The double diffusion is characterized in that the coagulation bath liquid is different for different spinning solutions. If the components in the spinning solution and the coagulation bath liquid are chemically reacted, most of the components are insoluble in the spinning solvent or the coagulation bath liquid, and are solidified and molded to obtain a strand-shaped solid. If the components of the spinning solution and those of the coagulation bath are only doubly diffused, the spinning solution is shaped to give a strand-like solid, which mostly exhibits an extracted form. In addition to the gas and liquid curing and molding methods, a gas and liquid combined curing method is also commonly used. When the temperature difference between the spinning solution and the coagulating bath liquid is large, the temperature of the spinneret plate surface needs to be protected, the spinneret plate surface is prevented from contacting with the liquid level of the coagulating bath, and an air gap is needed for separation. And simultaneously, solidifying the spinning solution by the coagulating bath liquid to form the tow-shaped fiber. Wet fibers, due to their high moisture content, are far from meeting the requirements of finished dry fibers.
Step S4: the wet fiber is dried by the fiber gas drying device provided by the invention to obtain dry tow. Wherein the value range of the gas pressure in the drying box 1 is 0.1MPa-0.6 MPa; the value range of the gas temperature in the drying box 1 is 10-150 ℃. Wherein, for different wet fibers, the adopted wind pressure and wind temperature are different and need to be adjusted according to the conditions of the strength, the moisture content and the like of the fibers.
Example 1
Dispersing ultrahigh molecular weight polyethylene (with a viscosity average molecular weight of 400 ten thousand) in a decalin solvent (the mass ratio of polyethylene to decalin is 10:90), swelling at 99 ℃ for 2h, heating to 160 ℃ to dissolve to form uniform spinning solution, metering, extruding from spinneret holes to form spinning streams, cooling and solidifying the spinning streams through a water bath at 10 ℃ to obtain solid jelly tows, passing the solid jelly tows through a 90 ℃ air box, installing an air cylinder with the diameter of 50mm in the air box, introducing 0.2MPa and 90 ℃ nitrogen into the air cylinder, arranging a gas distribution pipe and a metal gas damping rod with the diameter of 7mm in the air cylinder, and ensuring that the drawing rate of the tows in the air box is 1.01-1.8 times to obtain dry precursor. And (3) carrying out post-spinning hot stretching on the dry protofilament to obtain the polyethylene fiber with excellent fiber performance and the solvent content lower than 100 ppm.
Example 2
Dispersing ultrahigh molecular weight polyethylene (with a viscosity average molecular weight of 400 ten thousand) in a decalin solvent (the mass ratio of polyethylene to decalin is 10:90), swelling at 99 ℃ for 2h, heating to 160 ℃ to dissolve to form uniform spinning solution, metering, extruding from spinneret holes to form spinning streams, blowing air at 60 ℃ on the side to cool and solidify the spinning streams to obtain solid jelly tows, passing the solid jelly tows through a 100 ℃ air box, installing an air cylinder with the diameter of 50mm in the air box, introducing 0.2MPa and 90 ℃ nitrogen into the air cylinder, arranging a gas distribution pipe and a metal gas damping rod with the diameter of 7mm in the air cylinder, and ensuring that the drawing-up ratio of the tows in the air box is 1.01-1.8 times to obtain dry precursor. And (3) carrying out post-spinning hot stretching on the dry protofilament to obtain the polyethylene fiber with excellent fiber performance and the solvent content lower than 100 ppm.
Example 3
Dispersing ultrahigh molecular weight polyethylene (with a viscosity average molecular weight of 400 ten thousand) in a decalin solvent (the mass ratio of polyethylene to decalin is 10:90), swelling at 99 ℃ for 2h, heating to 160 ℃ to dissolve to form uniform spinning solution, metering, extruding from spinneret holes to form spinning streams, cooling and solidifying the spinning streams through circular blowing at 70 ℃ to obtain solid jelly tows, passing the solid jelly tows through a 110 ℃ air box, installing an air cylinder with the diameter of 20mm in the air box, introducing nitrogen with the diameter of 0.6MPa and 110 ℃ into the air cylinder, arranging an air distribution pipe and a glass gas damping rod with the diameter of 5mm in the air cylinder, and ensuring that the drawing rate of the tows passing through the air box is 1.01-1.8 times to obtain dry-state precursor. And (3) carrying out post-spinning hot stretching on the dry protofilament to obtain the dry polyethylene fiber with excellent fiber performance and the solvent content lower than 100 ppm.
Example 4
Dispersing ultrahigh molecular weight polyethylene (viscosity average molecular weight is 400 ten thousand) in paraffin oil solvent (mass ratio of polyethylene to paraffin oil is 7:93), swelling at 90 ℃ for 4h, heating to 190 ℃ to dissolve to form uniform spinning solution, extruding from spinneret orifices through metering to form spinning fine flow, cooling and solidifying the spinning fine flow through water bath at 20 ℃ to obtain solid jelly filament bundle, passing the solid jelly filament bundle through a 90 ℃ air box, installing an air cylinder with the diameter of 50mm in the air box, introducing 0.1MPa and 90 ℃ nitrogen into the air cylinder, arranging a gas distribution pipe and a metal gas damping rod with the diameter of 7mm in the air cylinder, and ensuring that the pulling rate of the filament bundle passing through the air box is 1.01-1.8 times to obtain dry precursor. And (3) carrying out post-spinning hot stretching on the dry protofilament to obtain the polyethylene fiber with excellent fiber performance and the solvent content lower than 100 ppm.
Example 5
Mixing ultra-high molecular weight polyethylene (viscosity-average molecular weight is 400 ten thousand) and solid paraffin (mass ratio of polyethylene to paraffin oil is 7:93), swelling for 4h at 90 ℃, dissolving at 190 ℃ to form uniform spinning solution, extruding from spinneret orifices through metering to form spinning stream, solidifying the spinning stream in air at 20 ℃ to obtain solid jelly glue tows, passing the solid jelly glue tows through a 70 ℃ air box, installing an air cylinder with the diameter of 50mm in the air box, introducing nitrogen with the pressure of 0.1MPa and the temperature of 70 ℃ into the air cylinder, arranging an air distribution pipe and a metal gas damping rod with the diameter of 7mm in the air cylinder, and ensuring that the pulling rate of the tows passing through the air box is 1.01-1.8 times to obtain dry-state precursor filaments. And (3) carrying out post-spinning hot stretching on the dry protofilament to obtain the polyethylene fiber.
Example 6
A7% sodium alginate aqueous solution system is used as a spinning solution, and is extruded from a spinneret plate hole, and a spinneret plate is immersed in a solidification solution, wherein the solidification solution is 20 ℃ and 20% calcium chloride aqueous solution. Washing calcium alginate fibers coming out of the coagulating bath, putting the calcium alginate fibers into an 80 ℃ gas box, installing an air cylinder with the diameter of 100mm in the box, introducing air with the pressure of 0.1MPa and the temperature of 80 ℃ into the air cylinder, arranging a gas distribution pipe and a ceramic gas damping rod with the diameter of 10mm in the air cylinder, and ensuring that the drawing-up rate of a filament bundle passing through the gas box is 1.01-1.05 times to obtain the dry calcium alginate fibers.
Example 7
The method is characterized in that a cellulose and N-methylmorpholine-N-oxide NMMO aqueous solution system is used as a spinning solution, the spinning solution is extruded from a spinneret plate, the spinning plate is extruded from holes of the spinneret plate, the spinneret plate is arranged 10mm above a coagulation bath solution, and the coagulation bath solution is a 20 ℃ aqueous solution. Washing cellulose fibers coming out of the coagulating bath, feeding the cellulose fibers into a 150 ℃ gas box, installing an air cylinder with the diameter of 80mm in the box, introducing 0.4MPa of inert gas at 150 ℃, arranging a gas distribution pipe and a ceramic gas damping rod with the diameter of 10mm in the air cylinder, and ensuring that the drawing-up rate of a tow passing through the gas box is 1.01-1.04 times to obtain dry cellulose fibers.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A fiber gas drying device is characterized by comprising a drying box (1), a plurality of air cylinders (23), an air source (12) and an exhaust hole (6);
the plurality of air cylinders (23) are disposed on one side wall of the drying cabinet (1) such that the plurality of air cylinders (23) are parallel to each other;
the path of the fibres (8) to be dried extends in a radial direction of the cylinders (23);
the air source (12) blows towards the fiber to be dried after passing through the air cylinder (23);
one end of the exhaust hole (6) is communicated with the accommodating space in the drying box (1), and the other end of the exhaust hole is communicated with the outside.
2. A fibre gas drying device according to claim 1, characterized in that the gas cylinder (23) comprises a gas cylinder body (2), a gas distribution means (3) and a gas dampening bar (4),
the gas distribution mechanism (3) is axially arranged on the inner wall of the gas cylinder body (2), so that the inner cavity of the gas cylinder body (2) is divided into a first accommodating space (14) and a second accommodating space (24) by the gas distribution mechanism (3);
the gas distribution mechanism (3) is provided with a through hole (13) so that the first accommodating space (14) is communicated with the second accommodating space (24);
a slit (7) is axially arranged on the air cylinder body (2), so that the second accommodating space (24) is communicated with the outside through the slit (7);
the gas damping rod (4) is limited in the second accommodating space (24);
wherein the first accommodating space (14) is communicated with the gas source (12);
the fiber (8) to be dried is arranged above the slit (7).
3. Fibre gas drying device according to claim 2, characterised in that the diameter of the gas dampening bar (4) is larger than the size of the through hole (13), the diameter of the gas dampening bar (4) is larger than the size of the slit (7), the diameter of the gas dampening bar (4) is smaller than the distance between the through hole (13) and the slit (7), such that the gas dampening bar (4) is confined within the second accommodation space (24).
4. A fibre gas drying device according to claim 3, characterised in that the inner wall of the cylinder body (2), close to the slit (7), is provided with flanges in axially symmetrical positions, the inner side of which is shaped to fit the outer side of the damping rod (4) in the axial direction.
5. Fibre gas drying device according to claim 2, characterised in that the cartridge (23) further comprises a first blocking end (18) and a second blocking end (19),
the first plugging end (18) is plugged at one end of the gas cylinder body (2); the second plugging end (19) is plugged at the other end of the air cylinder body (2); so that an inner cavity of the gas cylinder body (2) is formed among the gas cylinder body (2), the first blocking end (18) and the second blocking end (19).
6. Fibre gas drying device according to claim 5, characterised in that the first blocking end (18) is detachably connected to the cartridge body (2); the second plugging end (19) is detachably connected with the air cylinder body (2);
preferably, the fiber gas drying device further comprises a connecting strip (9),
a fiber passage (22) is arranged between the connecting strip (9) and the inflator body (2);
the path of the fibers (8) to be dried extends in the direction of the fiber passage (22);
preferably, only one end of the connecting strip (9) is connected with one end of the air cylinder body (2), and the other end of the connecting strip (9) is arranged in an open manner;
preferably, one end (20) of the connecting strip (9) which is arranged in an open manner is inclined upwards;
preferably, an upward bulge (21) is arranged at one end of the connecting strip (9) connected with the air cylinder body (2);
preferably, the width of the slit (7) ranges from 0.5mm to 10 mm;
preferably, the material of the gas damping rod (4) is selected from one of stainless steel, ceramic, polytetrafluoroethylene and polyethylene;
preferably, the gas damping rod (4) is a solid rod or a hollow rod;
preferably, the joint between the gas distribution mechanism (3) and the inner wall of the gas cylinder body (2) is in fillet transition;
preferably, the fiber gas drying device further comprises a gas pipe (11), one end of the gas pipe (11) is communicated with the gas source (12), and the other end of the gas pipe (11) is communicated with the inner cavity of the gas cylinder (23) through a gas inlet pipe (5) arranged on the gas cylinder (23);
preferably, the gas is selected from one or more mixed gases of air, nitrogen, water vapor, carbon dioxide and inert gas.
7. A method of gas drying fiber comprising the steps of:
pressurizing and stabilizing the spinning solution to obtain uniform spinning solution;
extruding the uniform spinning solution from a spinneret orifice to form a spinning trickle;
solidifying and forming the spinning trickle to obtain wet fibers;
the wet fiber is dried by the fiber gas drying device of any one of claims 1 to 6 to obtain a dry tow.
8. The fibre gas drying method according to claim 7, characterised in that the gas pressure in the drying box (1) ranges from 0.1MPa to 0.6 MPa.
9. The fibre gas drying method according to claim 7, characterised in that the gas temperature in the drying box (1) ranges from 10 ℃ to 150 ℃.
10. The fiber gas drying method according to claim 7, wherein during the step of solidifying and forming the spinning stream to obtain the wet fiber, the solidifying and forming manner is selected from one of gas solidification, liquid solidification, and combined solidification of gas and liquid;
preferably, in the step of obtaining the wet fiber by solidifying and forming the spinning trickle, when the temperature of the spinneret surface needs to be protected, the spinneret surface and the coagulating bath liquid are separated by adopting an air gap;
preferably, during the step of solidifying and forming the spinning stream to obtain the wet fiber, the solidifying and forming mode is gas solidifying, and during the gas solidifying process, the blowing mode is selected from one of gas cross blowing and gas circular blowing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111350493.8A CN114214745B (en) | 2020-12-08 | 2020-12-08 | Inflator for fiber gas drying device |
| CN202011424369.7A CN112708950B (en) | 2020-12-08 | 2020-12-08 | Fiber gas drying device and fiber gas drying method |
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| CN202011424369.7A CN112708950B (en) | 2020-12-08 | 2020-12-08 | Fiber gas drying device and fiber gas drying method |
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| CN202111350493.8A Division CN114214745B (en) | 2020-12-08 | 2020-12-08 | Inflator for fiber gas drying device |
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| CN112708950B CN112708950B (en) | 2021-12-21 |
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| CN202111350493.8A Active CN114214745B (en) | 2020-12-08 | 2020-12-08 | Inflator for fiber gas drying device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112708950B (en) | 2021-12-21 |
| CN114214745B (en) | 2023-01-10 |
| CN114214745A (en) | 2022-03-22 |
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