CN212270293U - Pre-oxidation furnace for regulating homogenization of carbon fiber pre-oxidized fiber - Google Patents

Pre-oxidation furnace for regulating homogenization of carbon fiber pre-oxidized fiber Download PDF

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CN212270293U
CN212270293U CN201922287394.4U CN201922287394U CN212270293U CN 212270293 U CN212270293 U CN 212270293U CN 201922287394 U CN201922287394 U CN 201922287394U CN 212270293 U CN212270293 U CN 212270293U
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oxidation
carbon fiber
precursor
homogenization
furnace
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李志鹏
王俊峰
姚冬
王永国
李超
吴海南
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HENAN YONGMEI CARBON FIBER CO Ltd
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HENAN YONGMEI CARBON FIBER CO Ltd
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Abstract

A pre-oxidation furnace for regulating and controlling homogenization of carbon fiber pre-oxidized fibers relates to the field of carbon fiber pre-oxidation. The utility model discloses regulation and control carbon fiber pre-oxidation silk homogenized pre-oxidation oven, it is including the furnace that is used for holding the precursor for draw the draft system of precursor, be used for carrying out the infrared heating device of infrared heating to the precursor, be used for carrying out the heating wire heating device of thermal heating to the precursor, and be used for forming the ventilation system of convection air in furnace, draft system, infrared heating device, heating wire heating device and ventilation system set up in furnace. The preoxidation furnace for regulating and controlling the homogenization of the carbon fiber preoxidized fiber heats the inside of the fiber through infrared rays, heats the outer layer of the fiber through hot air, and combines with the convection temperature control fiber outer layer to ensure the permeation of oxygen to the inside of the fiber, thereby finally achieving the purpose of regulating and controlling the homogenization of the preoxidized fiber.

Description

Pre-oxidation furnace for regulating homogenization of carbon fiber pre-oxidized fiber
Technical Field
The utility model relates to a carbon fiber pre-oxidation field particularly, relates to a regulation and control carbon fiber pre-oxidation silk homogenized pre-oxidation furnace.
Background
The carbon fiber is high tensile strength and high tensile modulus fiber with carbon content of more than 90%, has the advantages of low density, high temperature resistance, corrosion resistance, fatigue resistance and the like, and is widely applied to the fields of weapons, aerospace, buildings, automobiles, ships, medical and industrial equipment, sports and leisure products and the like. At present, Polyacrylonitrile (PAN) fiber is mainly used to prepare high performance carbon fiber, that is, PAN-based carbon fiber. The production steps of carbon fibers generally include polymerization, spinning, pre-oxidation, carbonization, post-treatment, and the like. The highest tensile strength of the carbon fiber produced industrially at present is about 7.2GPa, which is about 4 percent of the theoretical value, and in order to further improve the properties of the carbon fiber such as strength and the like, relevant researches propose that the production of the carbon fiber needs to be based on four types, namely fine denier, fine grain, homogenization and cleaning.
Homogenization refers to that the radial distribution of the structure and the performance of the fiber is basically uniform, no obvious skin-core structure exists, and only the pre-oxidized fiber is homogenized to obtain the densified carbon fiber. Preoxidation is an essential step in the preparation of PAN-based carbon fibers, and aims to convert linear polyacrylonitrile molecules into a ladder-shaped structure through preoxidation so as to improve the thermal stability of the fibers in the carbonization process. Numerous studies have shown that the gradient of the oxygen distribution in the radial direction of the fiber is one of the main factors influencing the homogenization of the pre-oxidized filaments and forming the sheath-core structure.
In traditional preoxidation process, along with cyclization reaction's the going on, the fibre skin forms fine and close netted trapezium structure, has hindered oxygen in the air to fibre internal diffusion, makes the oxidation of preoxidized silk cortex abundant even excessive, and the core is nevertheless preoxidized inadequately, influences the inside cyclization reaction of fibre, makes fibre core structure change hindered, causes fibre core structure loose, forms the skin-core structure. In the carbonization process of the loose core, a cavity is formed in the carbon fiber core, and becomes a breaking point when the carbon fiber is stretched, so that the mechanical property of the carbon fiber is influenced.
Therefore, a method capable of regulating the homogenization of carbon fiber pre-oxidized filaments is needed.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a regulation and control carbon fiber pre-oxidation silk homogenized pre-oxidation furnace, through infrared heating fibre inside, hot-blast heating fibre outer strata combines convection current accuse temperature fibre outer, guarantees oxygen to the inside infiltration of fibre, finally reaches the purpose of regulation and control pre-oxidation silk homogenization.
The embodiment of the utility model is realized like this:
the utility model provides a preliminary oxidation stove of regulation and control carbon fiber preliminary oxygen silk homogenization, its is including the furnace that is used for holding the precursor for draw the draft system of precursor, be used for carrying out the infrared heating device of infrared heating to the precursor, be used for carrying out the heating wire heating device of hot-blast heating to the precursor, and be used for forming the ventilation system of convection air in furnace, draft system, infrared heating device, heating wire heating device and ventilation system set up in furnace.
In a preferred embodiment of the present invention, the infrared heating device is disposed around the outer circumference of the filament in parallel.
In the preferred embodiment of the present invention, the infrared heating device is installed in the furnace chamber through the hanging rack.
In a preferred embodiment of the present invention, the pre-oxidation oven further comprises a reflection device, and the reflection device is disposed around the infrared heating device away from the precursor.
In a preferred embodiment of the present invention, the pre-oxidation furnace further comprises a filter device, and the filter device is located between the precursor and the infrared heating device.
In a preferred embodiment of the present invention, the infrared heating device is an infrared heating tube or an infrared heating plate.
In the preferred embodiment of the present invention, the ventilation system includes an air duct disposed along the inner wall of the furnace, and an air blower blowing air into the air duct, wherein the air duct located on the opposite sides of the furnace has an air opening.
In a preferred embodiment of the present invention, the heating wire heating device is disposed in the air duct.
In the preferred embodiment of the present invention, the furnace chamber has an air inlet and an air outlet, and the air inlet and the air outlet are disposed opposite to each other.
In the preferred embodiment of the present invention, the above-mentioned drafting system includes a drafting roller device and a tension automatic control device, the drafting roller device is connected with one end of the precursor, and along the axial drafting, the tension automatic control device is used for controlling the drafting tension of the precursor.
The embodiment of the utility model provides a beneficial effect is: the utility model discloses regulation and control carbon fiber pre-oxidation silk homogenized pre-oxidation oven, it is including the furnace that is used for holding the precursor for draw the draft system of precursor, be used for carrying out the infrared heating device of infrared heating to the precursor, be used for carrying out the heating wire heating device of hot-blast heating to the precursor, and be used for forming the ventilation system of convection current air in furnace, draft system, infrared heating device, heating wire heating device and ventilation system set up in furnace. The preoxidation furnace for regulating and controlling the homogenization of the carbon fiber preoxidized fiber heats the inside of the fiber through infrared rays, heats the outer layer of the fiber through hot air, and combines with the convection temperature control fiber outer layer to ensure the permeation of oxygen to the inside of the fiber, thereby finally achieving the purpose of regulating and controlling the homogenization of the preoxidized fiber.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is an infrared absorption spectrum of polyacrylonitrile;
FIG. 2 is a schematic structural diagram of a pre-oxidation furnace for regulating homogenization of carbon fiber pre-oxidized fibers according to an embodiment of the present invention;
fig. 3 is a schematic view of the working structure of the pre-oxidation furnace for regulating and controlling homogenization of carbon fiber pre-oxidized fibers according to the embodiment of the present invention.
Icon: 100-a pre-oxidation furnace; 101-hearth; 102-a control panel; 103-an insulating layer; 104-a blower; 105-an air inlet; 106-heating wire heating device; 107-lamp tube hanger; 108-draft load; 109-air duct; 110-PAN precursor; 111-infrared heating tube; 112-strand stores; 113-an air outlet; 120-a drafting system; 130-infrared heating means; 140-a ventilation system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The pre-oxidation furnace for regulating homogenization of carbon fiber pre-oxidized fiber according to the embodiment of the present invention will be described in detail.
The embodiment provides a method of regulation and control carbon fiber pre-oxidation silk homogenization, and this application does not do specifically to the precursor and limits, can be any precursor that can prepare the carbon fiber, and this embodiment adopts the PAN precursor as the raw materials, draws the PAN precursor to carry out the pre-oxidation, and at the pre-oxidation in-process, the comprehensive heating mode that adopts infrared heating and hot-blast heating heats the PAN precursor, adopts the mode of forced air convection to dispel the heat.
In one possible implementation, the spectral band of the infrared heating is offset matched to the infrared absorption spectrum of the filament.
In one possible implementation mode, the radiation peak wavelength of the infrared heating is 2.4-2.7 mu m.
In a possible implementation mode, the tension applied when the PAN precursor is pulled is generally 0.03-0.30 g/d.
Generally, the drawn PAN precursor is pre-oxidized in different temperature zones, and heating and heat dissipation are simultaneously performed in each temperature zone. Optionally, in some embodiments of the present application, the precursor is oxidized by an air pre-oxidation method, and the specific process is as follows: the protofilament sequentially enters a first oxidation furnace, a second oxidation furnace, a third oxidation furnace and a fourth oxidation furnace representing different temperature areas through a wire feeding device, a thermal cyclization reaction and an unsaturated oxidation reaction are carried out at 150-300 ℃, protofilament molecules are cyclized and crosslinked, the oxidation temperature and time are adjusted by adjusting a heating mode, the reaction atmosphere is adjusted by adjusting a heat dissipation mode, so that oxidized fibers with relatively uniform inner and outer layer structures are obtained, and meanwhile, the applied tension of protofilament traction is adjusted according to the crystal orientation degree of the protofilament and the molecular weight of a copolymer forming the fibers, so that the fibers keep certain orientation, and the pre-oxidized fibers are obtained.
After the pre-oxidation is completed, carbonization is usually required, and the specific process is as follows: under the protection of nitrogen and certain tension, the pre-oxidized fiber sequentially enters a medium-low temperature carbonization furnace and a high-temperature carbonization furnace, the temperature is gradually increased from 300 ℃ to 1300-1500 ℃, non-carbon atoms are discharged in the form of waste gas, and PAN-based carbon fiber, such as MT700-6K carbon fiber, is prepared.
This application is through the heating and the radiating process of adjustment fibre, change the inside and outside pre-oxidation rate of fibre, reach the purpose of adjusting its homogenization degree, its mechanism lies in inside through infrared heating fibre, hot-blast heating fibre is outside, combine convection current accuse temperature fibre skin, adjust and control the temperature at the radial distribution gradient of fibre, come the formation of control surface netted oxygen-blocking structure with reducing outer oxidation reaction rate, slow down the barrier effect of top layer network structure to oxygen infiltration, guarantee oxygen to the inside infiltration of fibre, finally reach the purpose of regulation and control pre-oxidation silk homogenization.
This application adopts infrared heating to give first place to on heating methods, and hot-blast heating is the mode of assisting to change the conduction of traditional hot-blast heating temperature outside-in, cause the outer high interior low of temperature, the outer process that is slow in fast of reaction. According to the infrared heating principle, infrared radiation is only sensitive to infrared radiationThe substance with the feeling is heated, generally comprising a polar substance with asymmetric molecular structure, wherein bonds such as C-H, C ≡ N in polyacrylonitrile structure can absorb infrared light (Table 1 is the main infrared absorption peak position of polyacrylonitrile, and FIG. 1 is the infrared absorption spectrum of polyacrylonitrile), and O is2、N2The main components in the air cannot be heated. The heating mode combining infrared heating and hot air heating is beneficial to regulating and controlling the radial temperature distribution of the fibers. In addition, the effects of heating and temperature distribution include radiant power, spectral matching to the fibers being heated, and the like. If the infrared heating spectral band is matched with the heated fiber, the light wave just enters the shallow layer of the fiber to cause violent resonance absorption, and the internal heating is limited; if the two are matched, the transmitted infrared light waves can better heat the interior of the fiber, so that the spectral band of infrared heating in the application is matched with the infrared absorption spectrum of polyacrylonitrile.
TABLE 1 polyacrylonitrile primary functional group corresponds to the infrared peak position
Numbering Wave number sigma/cm-1 Functional group
1 2940 CH2(expansion)
2 2240 C≡N
3 1620 C=C,C=N
4 1450 CH2(bending)
5 1380 CH,NH
6 1250 CH,CH2(swinging vibration)
7 1230 CH,CH2(swinging vibration)
8 1070 C-C skeleton vibration
9 780 C-H bending vibration
10 500 Aliphatic and aromatic-O-
In the heat dissipation mode, the effect and the temperature of the heat dissipation device are changed although the air convection mode is still adopted. In order to slow down the reaction of the outer layer of the fiber and ensure the permeation of oxygen, the reaction heat and the induction heat must be taken away by cold air or hot air of relatively low temperature. The fiber can keep the positive temperature difference of the interior of the fiber to the surface layer through internal infrared heating and external convection cooling, the reaction speed is high inside and low outside, and the homogenization control of the pre-oxidized fiber is finally realized, which cannot be realized by the traditional single hot air or single infrared heating mode.
Referring to fig. 2 and 3, the present embodiment further provides a pre-oxidation oven 100 for regulating homogenization of carbon fiber pre-oxidized filaments, which includes a furnace 101 for accommodating PAN filaments 110, a drawing system 120 for drawing the PAN filaments 110, an infrared heating device 130 for infrared heating of the PAN filaments 110, a heating wire heating device 106 for hot air heating of the PAN filaments 110, and a ventilation system 140 for forming convective air in the furnace 101, wherein the drawing system 120, the infrared heating device 130, the heating wire heating device 106, and the ventilation system 140 are disposed in the furnace 101. The method for regulating and controlling carbon fiber pre-oxidation filament homogenization can be realized by using the pre-oxidation furnace 100, specifically, the PAN precursor 110 is placed into the pre-oxidation furnace 100 provided with the heating system (the infrared heating device 130 and the heating wire heating device 106), the ventilation system 140 and the drafting system 120 for pre-oxidation process, a partial matching infrared heating method is adopted, the temperature is controlled by combining air convection, the whole pre-oxidation process can be realized, the effective control on the radial temperature distribution gradient of the fiber is realized, the regulation and control purpose of inner height and outer low is realized, thereby the traditional condition that only hot air is used for heating to cause outer high and inner low temperature, the reaction is outer fast and inner slow, and the skin-core structure is generated due to incomplete internal reaction. In addition, the thermal efficiency of infrared heating is high, the energy consumption in the pre-oxidation process is reduced, and energy conservation and emission reduction are realized.
The utility model discloses the implementation does not do specifically and restricts the setting mode of PAN precursor 110 in furnace 101, only need can realize foretell heating and radiating mode can, for example preoxidation furnace 100 can be vertical, and the precursor hangs perpendicularly in furnace 101 promptly, also can be for horizontal, and the precursor level is located furnace 101 promptly, and in this embodiment, PAN precursor 110 passes through precursor stores pylon 112 and hangs perpendicularly in furnace 101.
In this embodiment, the heating system includes an infrared heating device 130 and a heating wire heating device 106. The infrared heating device 130 directly irradiates the surface of the fiber to heat the fiber, and the heating wire heating device 106 provides a heat source for the ventilation system 140 to form circulating hot air, so that the fiber can be heated by hot air, and heat can be effectively dissipated.
Optionally, as an example, the infrared heating device 130 is located in parallel around the outer circumference of the PAN filament 110, and is used for heating the fiber surface of the PAN filament 110 by irradiation; the radiation peak wavelength of the infrared heating device 130 is 2.4-2.7 μm.
Optionally, as an example, the infrared heating device 130 is an infrared heating tube 111, such as a quartz heating tube, and the infrared heating tube 111 is a medium wave infrared emitter, and is controlled by a thyristor and an infrared thermometer. In addition, the appearance, material and heating manner of the infrared heating device 130 are changed, for example, the infrared heating tube 111 is replaced by a coating type infrared heating plate, which may affect the infrared band, emission efficiency, service life, energy saving efficiency, radiation uniformity and the like, but the above infrared heating effect can be achieved.
In one possible implementation, the infrared heating device 130 is installed in the furnace 101 through a hanger. Optionally, as an example, the infrared heating tube 111 is suspended from the top wall of the furnace 101 by a tube hanger 107.
In a possible implementation manner, the ventilation system 140 includes an air duct 109 disposed along an inner wall of the furnace 101, and a blower 104 blowing air into the air duct 109, where the air duct 109 located at two opposite sides of the furnace 101 is opened with air ports, and the air ports located at two opposite sides of the furnace 101 perform forced convection, so as to form forced convection air in the furnace 101. Optionally, as an example, two opposite inner side walls and a bottom wall of the furnace 101 are provided with an air duct 109, and the air ducts 109 located at the two inner side walls are provided with air ports arranged oppositely.
In one possible implementation, the heating wire heating device 106 is disposed in the air duct 109 to provide a heat source for the ventilation system 140, so as to form a circulating hot air. Optionally, as an example, the heating wire heating device 106 is located in the air duct 109 of the bottom wall so as not to block the air opening.
In a possible implementation manner, the ventilation system 140 further includes an air inlet and an air outlet, and specifically, the furnace 101 is provided with an air inlet 105 and an air outlet 113, and the air inlet 105 and the air outlet 113 are disposed opposite to each other to supplement fresh air and exhaust waste gas. Optionally, as an example, the air inlet 105 is located on the bottom wall of the furnace 101 and communicates with the air duct 109, and the air outlet 113 is located on the top wall of the furnace 101.
The ventilation system 140 has three main functions, namely, providing oxygen necessary for the pre-oxidation reaction; reaction heat and induction heat are taken away, the environmental temperature of oxidation reaction and the radial temperature distribution of the fibers are kept, in addition, the PAN protofilament 110 has poor heat conductivity, and the reaction heat can be taken away only by forced convection so as to prevent the fibers from fusing and even burning; taking away gas products, broken filaments and the like generated by the reaction, water, carbon dioxide, tar and the like generated by pyrolysis are not beneficial to the reaction and the products, possibly causing the adhesion of tows or the formation of hard shells on the surfaces of fibers, and in order to avoid the accumulation of the products, the fresh air needs to be discharged and supplemented in time in each cycle; and fourthly, for the pre-oxidation furnace 100 with larger volume, the forced convection of hot air can keep the temperature distribution of the furnace uniform and reduce the quality fluctuation caused by nonuniform temperature.
In one possible implementation, the drawing system 120 includes a drawing roller device connected to one end of the PAN precursor 110 and drawing in the axial direction, and an automatic tension control device for controlling the drawing tension of the PAN precursor 110. Optionally, as an embodiment, a weight is hung on the bottom end of the PAN filament 110 as the drafting load 108, thereby forming a drafting roller device.
In the pre-oxidation process, the linear PAN molecule is converted into a trapezoidal structure, theoretically, 14% -36% of chemical shrinkage can occur, and in order to keep the molecular chain in the axial direction of the fiber, the fiber in the pre-oxidation process needs to be drawn with certain tension. The applied tension is generally 0.03-0.30 g/d, the reaction stages are different, the drafting tension also needs to be adjusted, the tension is measured by an online tension tester, and the linear speed of the drafting roller is adjusted and controlled by a computer.
In one possible implementation, pre-oxidation oven 100 further includes a reflective device, such as a parabolic reflector, disposed around infrared heating device 130 away from PAN filaments 110, which may improve the uniformity of the radiation.
In one possible implementation, the pre-oxidation oven 100 further includes a filtering device, such as a notch filter, which is located between the PAN precursor 110 and the infrared heating device 130 and can intercept infrared light of a specific wavelength band to optimize the bias-matched heating method.
In one possible implementation, the pre-oxidation oven 100 further includes an insulation layer 103 covering the outer surface of the hearth 101 for reducing heat loss.
In one possible implementation, the pre-oxidation oven 100 further includes a control board 102, and the control board 102 is connected to the drawing system 120, the infrared heating device 130, the heating wire heating device 106, and the ventilation system 140 to control the operation of each unit.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
This example provides a carbon fiber, which is prepared using the pre-oxidation oven 100 shown in fig. 2, according to the following preparation method:
PAN precursor 110 (with the tensile strength of 500MPa) with the length of 1m is uniformly arranged on a precursor hanger 112, a weight with a certain weight is hung at the lower end of the PAN precursor 110 to serve as a drafting load 108(0.08g/d), a medium-wave infrared emitter with the power of 5KW, the length of 1.5 m and the peak wavelength of 2.7 mu m is selected by an infrared heating pipe 111, and the temperature is controlled by a thyristor and an infrared thermometer. The heating temperature gradient of the PAN protofilament 110 is 180 ℃, 200 ℃, 215 ℃, 230 ℃, 240 ℃, 250 ℃, 260 ℃, 270 ℃ and 275 ℃, the total number of heating gradients is 9, the corresponding heat preservation time is 10 minutes, the heating rate between gradients is controlled to be 1-5 ℃/minute, and the temperature difference is controlled to be +/-3 ℃. The temperature difference between the circulating air temperature in the hearth 101 and the PAN precursor 110 is controlled to be-30 ℃, so that pre-oxidized fibers are obtained, and 3 groups of parallel samples are made in total.
Carbonizing the pre-oxidized fibers of different groups of parallel samples through a carbonization furnace, wherein the carbonization conditions are as follows: under the protection of nitrogen, firstly carbonizing at a low-temperature carbonization temperature of 300-800 ℃ gradient, and then carbonizing at a high-temperature carbonization temperature of 900-1400 ℃ gradient to obtain carbon fibers, namely a parallel sample 1, a parallel sample 2 and a parallel sample 3.
Example 2
This example provides a carbon fiber that was prepared in substantially the same manner as in example 1, except that: the drawing tension was 0.20g/d, and carbon fibers were finally obtained. A total of 3 sets of replicates were made, replicate 1, replicate 2, and replicate 3.
TABLE 2 Main Performance index of carbon fiber under different Pre-Oxidation conditions
Figure DEST_PATH_GDA0002706133750000121
To sum up, the utility model discloses regulation and control carbon fiber pre-oxidation silk homogenized pre-oxidation stove is inside through infrared heating fibre, and hot-blast heating fibre skin combines convection current accuse temperature fibre skin, guarantees oxygen to the inside infiltration of fibre, finally reaches the purpose of regulation and control pre-oxidation silk homogenization.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a regulation and control carbon fiber pre-oxidation silk homogenization's preliminary oxidation stove which characterized in that, it is including the furnace that is used for holding the precursor, is used for drawing the draft system of precursor, be used for right the infrared heating device that the precursor carries out infrared heating is used for right the precursor carries out the heating wire heating device of hot-blast heating to and be used for forming the ventilation system of convection air in the furnace, the draft system infrared heating device with ventilation system set up in the furnace.
2. The pre-oxidation oven for regulating the homogenization of carbon fiber pre-oxygen wire as claimed in claim 1, wherein the infrared heating means are located in parallel around the outer circumference of the precursor wire.
3. The pre-oxidation oven for regulating and controlling the homogenization of carbon fiber pre-oxygen yarns as claimed in claim 2, wherein the infrared heating device is installed in the hearth through a hanger.
4. The pre-oxidation oven for conditioning the homogenization of carbon fiber pre-oxygen filaments according to claim 2, further comprising a reflection device disposed around the infrared heating device away from the filaments.
5. The pre-oxidation oven for conditioning the homogenization of carbon fiber pre-oxygen wire as recited in claim 1, further comprising a filter device positioned between the precursor fiber and the infrared heating device.
6. The pre-oxidation oven for regulating and controlling the homogenization of carbon fiber pre-oxidized filaments according to claim 1, wherein the infrared heating device is an infrared heating tube or an infrared heating plate.
7. The pre-oxidation furnace for regulating and controlling homogenization of carbon fiber pre-oxidized fibers as claimed in claim 1, wherein the ventilation system comprises an air duct arranged along the inner wall of the hearth and a blower for blowing air into the air duct, and the air duct on two opposite sides of the hearth is provided with air openings.
8. The pre-oxidation oven for regulating and controlling the homogenization of carbon fiber pre-oxygen wire according to claim 7, wherein the heating wire heating device is disposed in the air duct.
9. The pre-oxidation furnace for regulating and controlling homogenization of carbon fiber pre-oxidized fibers as claimed in claim 1, wherein the hearth is provided with an air inlet and an air outlet, and the air inlet is arranged opposite to the air outlet.
10. The pre-oxidation furnace for regulating and controlling the homogenization of carbon fiber pre-oxidized filaments according to claim 1, wherein the drawing system comprises a drawing roller device and an automatic tension control device, the drawing roller device is connected with one end of the precursor and draws the precursor along the axial direction, and the automatic tension control device is used for controlling the drawing tension of the precursor.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110846744A (en) * 2019-12-18 2020-02-28 河南永煤碳纤维有限公司 Method for regulating and controlling homogenization of carbon fiber pre-oxidized fiber and pre-oxidation furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110846744A (en) * 2019-12-18 2020-02-28 河南永煤碳纤维有限公司 Method for regulating and controlling homogenization of carbon fiber pre-oxidized fiber and pre-oxidation furnace

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