KR101349190B1 - Apparatus for maunfacturing carbon fiber - Google Patents

Abstract

The present invention prevents the carbon fiber yarns from being overlapped or contacted with other carbon fiber yarns running in parallel when the carbon fiber yarns are oxidized and flameproofed, and a plurality of carbon fiber yarns are individually spaced. By flame-resistant treatment at, the carbon fiber yarn (P) is heat-treated in an oxidizing atmosphere so that even if one carbon fiber yarn is shorted, processing of other carbon fiber yarns can proceed without interrupting the whole process. A carbon fiber processing apparatus having an oxidation stabilization furnace for obtaining flame retardant fibers and a carbonization furnace for obtaining carbon fibers (F) by heating and carbonizing the flame resistant fiber (P1); The oxidation stabilization furnace has a space portion having an inlet 11 through which carbon fiber yarn P is introduced and an outlet 12 discharged therein, an inlet 13 through which heated air is supplied to the space, and a discharge outlet discharged from the space. (14) is provided, and the carbon fiber yarn (P) is provided with a heating furnace in which a plurality of guide rollers 15 for guiding the traveling route arranged in multiple stages, the carbon fiber yarn ( P) relates to a carbon fiber processing apparatus wound with a gap therebetween to move through a plurality of rotations on the outer circumferential surface of the guide rollers 15 so as not to contact each other.

Description

[0001] APPARATUS FOR MAUNFACTURING CARBON FIBER [0002]

The present invention relates to a carbon fiber processing apparatus, and more particularly, when the carbon fiber yarns are oxidized and flameproofed, the carbon fiber yarns are arranged in parallel to prevent overlapping or contact with other carbon fiber yarns running in parallel. Of course, by flameproofing a plurality of carbon fiber yarns in separate spaces, even if one carbon fiber yarn is shorted, the processing process of other carbon fiber yarns can be processed without interrupting the entire process, thereby maintaining a stable manufacturing process. The present invention relates to a carbon fiber processing apparatus.

Generally, carbon fiber refers to a fiber composed of at least 90% of carbon, and is utilized as a lightweight material of high strength / high elasticity in aviation, leisure, automobile, shipbuilding, and special industries.

The carbon fiber composed of at least 90% of carbon in this way can be classified into polyacrylonitrile (PAN), pitch (rayon) and rayon (Rayon) carbon fibers depending on the production method and raw materials.

Typical characteristics of the carbon fiber as described above are light, strong, and high elasticity, which is 1/5 of the weight of steel and ten times stronger than steel.

The production method of carbon fiber is generally obtained by polymerizing and spinning rayon, pitch, or polyacrylonitrile as a precursor to prepare precursor fibers and heat-treating the precursor fibers.

Here, the heat treatment process of the precursor fibers will be briefly described as follows.

As shown in FIG. 1, precursor fibers (hereinafter referred to as carbon fiber yarns) are subjected to chlorination treatment at 200 to 400 ° C. in an oxidizing atmosphere. The fibers thus produced are called chlorinated fibers. The chlorinated fibers thus obtained are carbonized at 800 to 2000 占 폚 in an inert gas atmosphere to produce carbon fibers.

Such a chlorination treatment is a process of oxidizing a fiber from its surface in order to convert the thermoplastic fiber into a thermosetting fiber to prevent fusion and thermal melting of the fiber in a subsequent high-temperature carbonization (graphitization) process, If direct carbonization or activation is carried out, the exothermic reaction such as ring opening (reformation) and dehydrogenation proceeds abruptly and becomes combustion rather than carbonization.

The carbonation treatment is carried out through a carbonization furnace. The carbonization furnace is a low-temperature furnace (LTF) which is carbonized by heating at a relatively low temperature of 800 to 900 DEG C, Low temperature furnace) and a high temperature furnace (HTF: High Temperature Furnace) which is carbonized by heating at a relatively high temperature of 1000 to 1200 ° C.

As described above, the heat treatment step in the production of carbon fibers is an important step in the production of carbon fibers. That is, a slight temperature difference or temperature change in the heat treatment step may affect the quality of the carbon fiber.

Therefore, in order to produce a high quality carbon fiber, a technique for stably processing the carbon fiber yarn in the heat treatment step is required. Also, since a plurality of heat treatment apparatuses must be provided in order to perform the heat treatment at various stages, a high cost is required for the equipment.

As one of the conventionally known structures for oxidation stabilization to flame-resistant carbon fiber yarns in the above, as shown in FIG. 2, the inlet 1 through which the carbon fiber yarns P are introduced and the outlet 2 through which the carbon fiber yarns P are introduced. ) Is provided with a space portion having an inlet (3) for supplying the heated air and the discharge port (4) is provided.

A plurality of rollers 5 are arranged in the space so that the carbon fiber yarn P is aligned vertically in a multi-stage manner and travels from the inlet 1 to the outlet 2.

Therefore, the carbon fiber yarn P introduced through the inlet 1 is oxidized and deoxidized while being passed through the passageway arranged vertically up multistage by the plurality of rollers 5 to the outlet 2 .

At this time, the heated air is injected through the inlet port 3 to treat the carbon fiber yarn P running on the space portion.

In the above-mentioned oxidation stabilization, a plurality of carbon fiber yarns P are arranged in a horizontal or vertical direction, and the carbon fiber yarn P is successively heated and deoxidized through each oxidation stabilization furnace at 200 to 400 ° C.

That is, the heat treatment is carried out at 200 to 250 占 폚 in the case of the oxidation stabilization at the best stage, the heat treatment is carried out at 250 to 300 占 폚 in the case of oxidizing and stabilizing the lane, the heat treatment is carried out at 300 to 350 占 폚, In the oxidative stabilization process, the carbon fiber yarn P is heat-treated at 305 to 400 DEG C to prevent the carbon fiber yarn P from being suddenly heated to a high temperature to be broken, and the chlorination treatment is stably performed.

The chlorinated fibers that have been chlorinated through the oxidation stabilization furnace are sequentially carbonized by the low temperature heating furnace (LTF) 6 and the high temperature heating furnace (HTF) 7 of the carbonization furnace, heated by the carbon fiber, Processed by a sizing means 8, dried in a drying furnace 9, wound and wound on a separate roll through separate winding means 10, and stored and transported.

However, in the conventional carbon fiber processing apparatus, the carbon fiber yarns that are arranged in parallel in the oxidative stabilization manner and are running are overlapped with each other, or contact with other parts running on the traveling path arranged vertically or vertically in multi- There is a problem that they are short-circuited or damaged.

That is, when the carbon fiber yarn heated by the heated air is brought into contact with the other portion or the other side of the carbon fiber, the contacted portion is damaged and short-circuited to stop the operation to stabilize the oxidation, There was a problem.

In addition, when one carbon fiber yarn is shorted or damaged, the entire process is stopped, and the shortened carbon fiber yarn must be treated and restarted, thereby delaying the carbon fiber processing and thus reducing productivity.

That is, it takes a lot of time to stop the oxidation stabilization furnace where the inside is kept at a high temperature and lower it to the outside temperature, and it takes a long time to raise the internal temperature to restart the operation, and the production efficiency drops drastically when the operation is stopped or restarted. There was a problem.

That is, there is a problem that the processing of a number of other carbon fiber yarns is delayed by damage of one carbon fiber yarn.

The present invention has been proposed to solve the above conventional problems, and an object of the present invention is to oxidize carbon fiber yarns and flameproof the carbon fiber yarns, and the carbon fiber yarns arranged in parallel and run on the other side of the carbon fiber yarns. By preventing overlapping or contact, as well as flameproofing a plurality of carbon fiber yarns in separate spaces, it is possible to process other carbon fiber yarns without interrupting the entire process even if one carbon fiber yarn is shorted. An object of the present invention is to provide a carbon fiber processing apparatus capable of stably maintaining a manufacturing process.

Carbon fiber processing apparatus of the present invention for achieving the object of the present invention as described above in the carbon fiber processing apparatus having an oxidation stabilization furnace to obtain flame-resistant fiber by heat-treating carbon fiber yarn in an oxidizing atmosphere; The oxidation stabilization furnace has a space portion having an inlet and an outlet through which carbon fiber yarn is introduced, an inlet through which heated air is supplied and an outlet through which the heated air is provided, and an outlet from the inlet at the space portion. It consists of a heating furnace provided with guide rollers which are rotated and which have a space between each other so as to guide to drive to the side; The carbon fiber yarn is wound on the outer circumferential surface of the guide rollers while being wound with a gap therebetween so as not to contact each other.

The carbon fiber yarns are wound in a coil spring form with a gap therebetween so as not to contact each other on the outer circumferential surfaces of the guide rollers.

The oxidation stabilization furnace is characterized in that the heating furnace is arranged in series in parallel so that the carbon fiber yarns can be heated a plurality of times as they are connected to each other.

 The oxidation stabilization furnace is characterized in that the heating furnace is formed so that the plurality is stacked in a vertical multi-stage so that the carbon fiber yarn is connected to each other and heated a plurality of times.

The oxidation stabilization furnace is characterized in that the plurality of the heating is connected in parallel so that a plurality of carbon fiber yarns are flameproofed while driving the respective oxidation stabilization furnace.

In addition, the carbon fiber processing apparatus of the present invention for achieving the object of the present invention as described above is an oxidation stabilization furnace to obtain a flame resistant fiber by heat-treating carbon fiber yarn in an oxidizing atmosphere, and by heating and carbonizing the flame resistant fiber A carbon fiber processing apparatus comprising a carbonization furnace for obtaining carbon fibers; The carbonization furnace has a space having an inlet and outlet through which the flame resistant fiber is introduced, and has an inlet through which a heated inert gas is supplied and an outlet through which the inert gas is heated, and the flame resistant fiber travels in the space. Consisting of a heating furnace in which the conveying rollers are arranged; The furnace is a low temperature furnace (LTF: Low Temperature Furnace) to heat and carbonize at a relatively low temperature of 800 ~ 900 ℃, and a high temperature furnace (HTF: High Temperature) to heat and carbonize at a relatively high temperature of 1000 ~ 1200 ℃ Furnace); The low temperature heating furnace is a carbon fiber processing apparatus, characterized in that the coil to generate heat by receiving power from the outer peripheral surface of the tubular gas in which the inert gas is supplied and discharged.

A temperature sensor for sensing a temperature is provided inside the base to control the supply of power so as to sense the temperature inside the base and to calculate the sensed temperature so as to maintain the inside of the base at a predetermined temperature .

In addition, the carbon fiber processing apparatus of the present invention for achieving the object of the present invention as described above is an oxidation stabilization furnace to obtain flame-resistant fiber by heat-treating carbon fiber yarn in an oxidizing atmosphere, and by heating and carbonizing the flame-resistant fiber A carbon fiber processing apparatus comprising a carbonization furnace for obtaining carbon fibers; The carbonization furnace has a space having an inlet and outlet through which the flame resistant fiber is introduced, and has an inlet through which a heated inert gas is supplied and an outlet through which the inert gas is heated, and the flame resistant fiber travels in the space. Consisting of a heating furnace in which the conveying rollers are arranged; The furnace is a low temperature furnace (LTF: Low Temperature Furnace) to heat and carbonize at a relatively low temperature of 800 ~ 900 ℃, and a high temperature furnace (HTF: High Temperature) to heat and carbonize at a relatively high temperature of 1000 ~ 1200 ℃ Furnace); The high temperature heating furnace is located in the interval between the moving rollers for the low-temperature heating flame-resistant fiber to run in the low-temperature heating furnace and consists of a tubular tubular body in which the inert gas is supplied and discharged, the moving roller is the It consists of a pair of rollers arranged in succession to the inlet of the cylinder and the rollers located at the outlet, the rollers located in the center of the rollers in the flame-resistant fiber is moved through the rollers by receiving power through a power supply means It is characterized by being heated to heat.

And the rollers other than the roller to which power is supplied among the rollers are grounded.

When the carbon fiber processing apparatus of the present invention made as described above flame-resistant carbon fiber yarns, by processing the carbon fiber yarns in a separate space, to avoid interference with other carbon fiber yarns, damage such as short circuit during processing When this happens, the damaged carbon fiber yarn is replaced or repaired only for the module to be processed, and the other carbon fiber yarns are processed as it is, so that the carbon fiber can be stably processed without reducing productivity. Have

In addition, by heat treatment using an electrode in the carbonization process of carbonizing the flame-resistant flame resistant fiber through an oxidation stabilization furnace, it is possible to economically reduce the processing time of the carbon fiber and lower the processing cost.

1 and 2 is an exemplary view schematically showing a conventional carbon fiber processing apparatus.
Figure 3 is an exemplary view schematically showing a carbon fiber processing apparatus according to an embodiment according to the present invention.
4 and 5 is a schematic illustration showing the structure of the oxidative stabilization furnace applied in this embodiment.
Figure 6 is a schematic illustration showing the structure of a low temperature carbonization furnace applied to this embodiment.
Figure 7 is a schematic illustration showing the structure of a high temperature carbonization furnace applied to this embodiment.
8 is an exemplary view showing an arrangement of an oxidation stabilization furnace applied to this embodiment.
9 is an exemplary view showing an arrangement state of an oxidative stabilization furnace applied to this embodiment in a plan view.

Hereinafter, a carbon fiber processing apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This embodiment is provided to more fully describe the present invention to those skilled in the art. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

3 to 9 is a view showing a carbon fiber processing apparatus according to an embodiment according to the present invention, the carbon fiber processing apparatus of this embodiment is heat-treated carbon fiber yarn (P) in the oxidation atmosphere as shown in FIG. The oxidation stabilization furnace which obtains flame-resistant fiber by this, and the carbonization furnace which obtains carbon fiber F by heating and carbonizing the flame-resistant fiber P1 are provided.

That is, the carbon fiber yarn (P) is subjected to a chlorination treatment at 200 to 400 ° C in an oxidation atmosphere of the oxidation stabilization to obtain the chlorinated fiber (P1), and the chlorinated fiber (P1) The carbon fiber (F) is produced by heating at 800 to 1200 ° C to carbonize it.

In the carbon fiber processing apparatus of the present embodiment as described above, the oxidation stabilization furnace has a space having an inlet 11 through which the carbon fiber yarn P is introduced and an outlet 12 through which the air is heated. It is provided with an inlet 13 to be supplied and an outlet 14 to be discharged, and consists of a heating furnace in which a plurality of guide rollers 15 for guiding the carbon fiber yarn P to run in the space portion.

Therefore, the carbon fiber yarn P introduced through the inlet 11 is oxidized and flameproofed by the guide rollers 15 and is discharged to the outlet 12 while being flameproofed.

At this time, the heated air is injected through the charging port 13 to treat the carbon fiber yarn P running on the space portion.

It is preferable that the heated air contains ozone ions and oxygen.

In the above, a plurality of oxidation stabilization furnaces are arranged horizontally as shown in FIG. 3 or vertically as shown in FIG. 8, and the carbon fiber yarns P are 200-400 ° C. through the respective oxidation stabilization furnaces. Sequentially heated to flameproof.

That is, the heat treatment is carried out at 200 to 250 占 폚 in the case of the oxidation stabilization at the best stage, the heat treatment is carried out at 250 to 300 占 폚 in the case of oxidizing and stabilizing the lane, the heat treatment is carried out at 300 to 350 占 폚, In the oxidative stabilization process, the carbon fiber yarn P is heat-treated at 305 to 400 DEG C to prevent the carbon fiber yarn P from being suddenly heated to a high temperature to be broken, and the chlorination treatment is stably performed.

In the space portion, the carbon fiber yarn is wound around the outer circumferential surface of the guide rollers through a plurality of rotations but is wound with a gap therebetween so as not to contact each other.

That is, as shown in Figure 4, it is wound in a state wound a plurality of times in a pair of guide rollers consisting of two pairs and run while flame-resistant treatment in the space portion.

Accordingly, the flameproofing treatment space can be driven for a long time even in a narrow space, and the flameproofing treatment can be performed smoothly without increasing the equipment.

And, as shown in FIG. 9, the individual and a plurality of them can be installed in parallel to flame-resistant a plurality of carbon fiber yarns wound on a take-up roll at once, eliminating interference with other carbon fiber yarns, and one carbon during processing. When damage such as short circuit occurs in the fiber yarn, the damaged carbon fiber yarn is replaced or repaired only by the heating process, and the processing of the other carbon fiber yarns is carried out as it is, so that the carbon fiber can be stably It can be processed.

In addition, the carbon fiber yarn wound a plurality of times on the guide roller is wound in a coil spring form with a gap therebetween so as not to contact each other on the outer peripheral surface of the guide roller.

Therefore, the contact with the other parts of the flame-resistant carbon fiber yarn is prevented from occurring, thereby preventing agglomeration, short circuit or damage to each other inside the heating furnace.

In addition, the oxidation stabilization furnace is formed as a plurality of consecutively arranged in parallel so that the heating furnace is heated as many times as the carbon fiber yarns are connected to each other as shown in Figure 3, or the heating furnace is shown in FIG. As shown in the plurality is arranged to be stacked in a vertical multi-stage so that the carbon fiber yarns are connected to each other and can be heated a plurality of times.

Accordingly, the heat treatment is performed at 200-250 ° C. in the heating furnace of the highest stage, the heat treatment is performed at 250-300 ° C. in the lane heating furnace, and the heat treatment is performed at 300-350 ° C. in the lane heating furnace. In the furnace, the heat treatment is performed at 305 to 400 ° C. to prevent the carbon fiber yarn P from being heated to a high temperature rapidly and to be damaged, thereby making the flameproof treatment stable.

In addition, the oxidation stabilization furnace is a plurality of heating furnaces are connected in parallel so that a plurality of carbon fiber yarns are flameproofed while driving the respective oxidation stabilization furnace to smoothly flame the plurality of carbon fiber yarns wound on the take-up roll Can be processed.

In the carbon fiber processing apparatus of the present embodiment as described above, the carbonized furnace for obtaining the carbon fibers (F) by heating and chlorinating the chlorinated fibers (P1) obtained through the oxidation stabilization furnace has an inlet (23) and an exhaust outlet (24) through which the heated inert gas is supplied and a discharge outlet (24) for discharging the inert gas are provided in the space, and the chlorinated fiber (P1 And conveying rollers 25 on which the conveying rollers 25 run.

That is, while the chlorinated fibers P1 pass through the heating furnace, they are sequentially heated and carbonized in a temperature atmosphere of 800 to 1200 ° C to produce carbon fibers (F).

The inert gas is most preferably nitrogen, and prevents the chlorinated fibers P1 from being oxidized and burnt in the space portion.

The heating furnace constituting the carbonization furnace has a low temperature furnace (LTF: Low Temperature Furnace) for primary carbonization by heating the chlorinated fiber (P1) at a relatively low temperature of 800 to 900 DEG C and a relatively high temperature And a high temperature furnace (HTF) for secondary carbonization by heat treatment.

Therefore, the chlorinated fibers P1 are heated and carbonized while passing through the low-temperature heating furnace and the high-temperature heating furnace sequentially.

In the low-temperature heating furnace, a coil 31 is wound around an outer circumferential surface of a tube-shaped base 30 through which inert gas is supplied and discharged, A temperature sensing sensor 32 for sensing a temperature is provided to sense the temperature inside the base 30 and to calculate the sensed temperature so as to control the supply of power to maintain the interior of the base 30 at a predetermined temperature .

That is, since the base 30 is heated by receiving power, the chlorinated fiber P1 can be heated to a stably set temperature as the temperature control is easy.

The base 30 is preferably made of a material that is not deformed or damaged by heat (800 to 900 ° C) to be heated. The material may be made of tungsten, but is not limited thereto.

The exhaust gas discharged from the base 30 is transferred to another gas processing unit 50, filtered, and then re-introduced into the gas 30 or discharged to the outside.

That is, it is possible to prevent the external environment from being contaminated by the exhaust gas, and to save the energy for maintaining the internal temperature of the base 30 by re-introducing the high temperature air.

In the carbon fiber processing apparatus of this embodiment, the high-temperature heating furnace is located at an interval between the moving rollers that are driven by the chlorinated fibers P1 heated at low temperature in the low-temperature heating furnace, And the moving roller is constituted by a pair of rollers 41 and 42 arranged in line with the inlet 21 of the cylinder 40 and a pair of rollers 41 and 42 disposed at the outlet 22 The rollers 41, 42 and 43 are connected to a roller 42 located at the center among the rollers 41, 42 and 43 by receiving power from the power supply means 44. [ 43 and the remaining rollers 41, 43 except for the roller 42 to which the power is supplied, among the rollers 41, 42, 43, Are grounded.

Therefore, the carbon fibers having passed through the low-temperature heating furnace in the conduction section provided between the grounded rollers 41 and 43 are brought into contact with the roller 42 supplied with power through the power supply means 44, The carbon fiber (F) is electrically heated by the self-resistance of the carbon fiber (F), thereby being heat-treated at a high temperature by itself.

That is, since no heating means is required and heating is performed by the own electric resistance heat, the heating efficiency is high, so that consumption of energy to be applied is remarkably reduced compared with the conventional method, and the heating time is remarkably shortened.

The exhaust gas discharged from the cylinder 40 is transferred to a separate gas processing unit 50, filtered, and then re-introduced into the cylinder 40 or discharged to the outside.

That is, it is possible to prevent the external environment from being contaminated by the exhaust gas, and to save the energy for maintaining the internal temperature of the cylinder 40 by re-introducing the high temperature air.

In addition, a temperature sensor S for sensing the internal temperature of the cylinder 40 is provided to sense the temperature and to control the power supply means 44 through a controller to apply a controlled power to maintain a constant temperature at all times .

As described above, the chlorinated chlorinated fibers P1 that have been chlorinated through the oxidation stabilization furnace are sequentially carbonized by running in the low temperature heating furnace LTF and the high temperature heating furnace HTF of the carbonization furnace, heated with the carbon fibers F, Processed by a sizing means 60, dried in a drying furnace 70, and wound and wrapped in a separate roll through separate winding means 80. [

The embodiments of the carbon fiber processing apparatus of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments can be made without departing from the scope of the present invention. You will know. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the invention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims

11: entrance 12: exit
13: inlet 14: outlet
15: guide roller 21: entrance
22: outlet 23: inlet
24: outlet 30: gas
31 coil 32 temperature sensor
40: cylinder 41, 42, 43: roller
44: power supply means 50: gas processing unit
60: sizing means 70: drying furnace
80: winding means

Claims (9)

In a carbon fiber processing apparatus having an oxidation stabilization furnace to obtain flame-resistant fibers by heat-treating carbon fiber yarn in an oxidizing atmosphere;
As the oxidation stabilization,
It has a space portion having an inlet and an outlet for the carbon fiber yarn is introduced, the inlet is provided with the heated air is supplied to the space portion and the discharge port is discharged, and each other to guide the running from the inlet to the outlet side on the space portion It consists of a heating furnace provided with guide rollers rotated and spaced between;
The carbon fiber yarn is moved through a plurality of rotations on the outer circumferential surface of the guide rollers, the carbon fiber processing apparatus characterized in that it is wound with a gap between each other so as not to contact each other. The method of claim 1,
The carbon fiber yarn is a carbon fiber processing apparatus, characterized in that wound in the form of a coil spring with a gap therebetween so as not to contact each other on the outer peripheral surface of the guide rollers. The method of claim 1, further comprising:
The oxidation stabilization furnace is a carbon fiber processing apparatus, characterized in that the plurality of the heating furnace is formed in succession arranged in parallel so that the carbon fiber yarns can be heated a plurality of times while being connected to each other. The method of claim 1, further comprising:
The oxidation stabilization furnace is a carbon fiber processing apparatus, characterized in that the heating furnace is arranged so that a plurality of vertically stacked in multiple stages so that the carbon fiber yarn is connected to each other and heated a plurality of times. The method of claim 1, further comprising:
The oxidation stabilization furnace is characterized in that the plurality of heating furnaces are connected in parallel so that a plurality of carbon fiber yarns are flameproofed while driving the respective oxidation stabilization furnace.
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