Guide roller broken filament cleaning and cooling system of wide oxidation furnace for producing kiloton carbon fibers

Abstract

The utility model relates to a broken filament cleaning and cooling system for a guide roller of a wide oxidation furnace for producing kiloton carbon fibers, which comprises an air knife and a gas collecting hood which are positioned beside the peripheral part of the guide roller of the oxidation furnace, the air knife is connected with a nitrogen gas source through a gas pipe, the gas collecting hood is connected with an air pipe in which a filter screen is arranged, and the air pipe is connected to an air inlet of a centrifugal fan. The surface of the oxidation furnace guide roller is purged through the air knife connected with nitrogen, broken filaments are collected through the gas collecting hood, the technical problem that the broken filaments are scattered in air to cause environmental pollution is solved, and the technical problem of physical health of operators is solved; under the working condition of a high-linear-speed process, the potential safety hazard problem that a person or a cleaning tool is wound into the guide roller is solved, the amount of broken filaments on the surface of fibers can be effectively reduced through purging of the device, particularly, the temperature of the guide roller of an oxidation furnace is reduced to about 40 DEG C, and the risk that an operator is scalded is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of production of carbon fiber oxidation furnace of kiloton wide guide roller hair cleaning and cooling system, belong to carbon fiber carbonization production process equipment field. BACKGROUND

[0002] Carbon fiber is a kind of high-strength, high-modulus fiber new fiber material with carbon content above 92%, which is a microcrystalline graphite material obtained by stacking flaky graphite microcrystals along the fiber axial direction and carbonizing and graphitizing treatment. It has excellent properties such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, heat transfer and small thermal expansion coefficient. Carbon fiber composite materials can not only bear load as structural materials, but also play a role as functional materials. Therefore, in recent years, the application of carbon fiber has developed very rapidly and has been widely used in many fields such as aerospace, automobile, energy, construction and sports equipment.

[0003] During the oxidation process of carbon fiber, some hair will be adsorbed on the surface of the oxidation furnace guide roller. The hair accumulated on the surface of the oxidation furnace guide roller will not only peel off and adhere to the good carbon fiber yarn, affecting the quality of the system product, but also reduce the friction coefficient of the guide roller, causing the guide roller to slip. The traditional method of cleaning hair during the oxidation process is to use a cloth or cleaning tool to clean the non-contact surface of the guide roller by hand. This not only affects the production efficiency, but also increases the safety risk of personal injury or cleaning tool entrapment. In high line speed conditions, such as "running speed above 10 m / min", the roller surface temperature increases, and the problem of personnel scalding has not been solved. Therefore, the cleaning of the oxidation furnace guide roller hair has become an important factor affecting the product quality, production efficiency and production safety of domestic carbon fiber.

[0004] Chinese patent application No. CN201911166455X discloses a hair cleaning device, which includes a dust collection box, a brush belt, a power device and a dust collection and removal device. The dust collection box is arranged along the length direction of the pulling roller, and the side of the dust collection box close to the pulling roller is open. The side of the dust collection box away from the pulling roller is provided with an air suction port. The brush belt is arranged in the dust collection box and is arranged along the length direction of the pulling roller to scrape off the hair attached to the surface of the pulling roller. The power device drives the brush belt to rotate circularly along the length direction of the pulling roller. The dust collection and removal device is communicated with the air suction port to suck out the hair in the dust collection box.

[0005] In the above technical solution, although the dust collection and removal device is communicated with the air suction port to suck out the hair in the dust collection box, reducing the safety risk of manual operation, the high temperature problem of the oxidation furnace guide roller has not been solved.

[0006] CN2023108453530 discloses a kind of carbon fiber oxidation furnace reciprocating roller cooling structure, including reciprocating roller, blow pipe, the air outlet is arranged on the blow pipe, air enters blow pipe and then is blown to reciprocating roller from air outlet.The carbon fiber oxidation furnace reciprocating roller cooling structure disclosed in the application can make air enter blow pipe and then be blown to reciprocating roller from air outlet, cool reciprocating roller, and improve the pre-oxidized fiber on reciprocating roller.

[0007] In the above technical solution, although air is blown to the reciprocating roller through the air outlet to cool the reciprocating roller, this solution can only cool the reciprocating roller to about 60°C, and still cannot avoid the risk of scalding the operator;Moreover, the loose hairs blown by the reciprocating roller are not treated, and the loose hairs pollute the air environment, and the harm caused by the absorption of the loose hairs into the body is not solved.

[0008] Therefore, to solve the above technical problems, the present application provides a guide roller hair cleaning and cooling system for a kiloton-level carbon fiber wide-width oxidation furnace. Practical new type content

[0009] In view of the deficiencies of the prior art, the technical problem to be solved by the present application is to provide a guide roller hair cleaning and cooling system for a kiloton-level carbon fiber wide-width oxidation furnace.

[0010] To solve the above technical problems, the technical solution of the present application is: a guide roller hair cleaning and cooling system for a kiloton-level carbon fiber wide-width oxidation furnace, comprising an air knife located beside the outer peripheral part of the oxidation furnace guide roller and a gas collecting hood, the air knife is connected to a nitrogen gas source through a gas pipe, the gas collecting hood is connected to a wind pipe with a filter screen inside, and the wind pipe is connected to the air inlet of a centrifugal fan.

[0011] Preferably, the gas collecting hood is located above the oxidation furnace guide roller, and the cover opening of the gas collecting hood faces downward, and the wind pipe is connected to the top of the gas collecting hood.

[0012] Preferably, the wind pipe extends downward from the top and is connected to the air inlet of the centrifugal fan.

[0013] Preferably, an exhaust pipe is connected to the exhaust port of the centrifugal fan.

[0014] Preferably, the filter screen is arranged near the front of the air inlet of the centrifugal fan.

[0015] Preferably, the filter screen has two rows arranged front and back.

[0016] Preferably, the pipe wall of the wind pipe is provided with an openable and closable maintenance opening at a position corresponding to the filter screen.

[0017] Preferably, the air knife comprises a gas collecting pipe which is axially parallel to the oxidation furnace guide roller, and a narrow air knife slit is formed along the length direction of the pipe wall of the gas collecting pipe towards the oxidation furnace guide roller, and a gas pipe is connected to the gas collecting pipe.

[0018] Preferably, the air knife slit has three air knife slits which are distributed in upper, middle and lower positions, the gas pipe comprises three nitrogen gas branch pipes, one end of the three nitrogen gas branch pipes is connected to the gas collecting pipe, and the other end is connected to the same nitrogen gas main pipe, and the nitrogen gas main pipe is connected to a nitrogen gas source.

[0019] Preferably, a switch valve is arranged on each nitrogen gas branch pipe, and a stop valve is arranged on the nitrogen gas main pipe.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The air knife connected to the nitrogen gas blows the surface of the oxidation furnace guide roller, and the lint is collected by the gas collecting cover, so that the technical problems of environmental pollution caused by the scattering of the lint in the air and the health of the operator are solved, the safety hidden trouble problem that the operator or the cleaning tool is rolled into the guide roller is solved under the high linear speed process condition, the amount of the lint on the surface of the fiber is effectively reduced by blowing through the device, especially the temperature of the oxidation furnace guide roller is reduced to about 40 DEG C, and the risk that the operator is scalded is solved.

[0022] The utility model will be further explained in detail in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure schematic view of the embodiment of the utility model.

[0024] In the figure: oxidation furnace guide roller 1, air knife 2, gas collecting cover 3, nitrogen gas source 4, filter screen 5, air pipe 6, centrifugal fan 7, exhaust pipe 8, gas collecting pipe 9, air knife slit 10, nitrogen gas branch pipe 11, nitrogen gas main pipe 12, switch valve 13, stop valve 14. DETAILED DESCRIPTION

[0025] The utility model will be further explained in combination with the drawings and specific embodiments.

[0026] It should be pointed out that the following detailed description is exemplary and aims at providing further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as that understood by the ordinary skilled person in the technical field to which the present application belongs.

[0027] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components, and / or combinations thereof.

[0028] As shown in Figure 1 The embodiment provides a guide roller fuzz cleaning and cooling system of a kiloton carbon fiber wide-width oxidation furnace, which is preferentially used in a carbonization production line with a furnace width of 3m-5m, and the system comprises an air knife 2 and a gas collecting hood 3 located at the side of the outer peripheral part of the guide roller 1 of the oxidation furnace, the air knife is connected with a nitrogen gas source 4 through an air pipe, the nitrogen gas source is dry nitrogen, the gas collecting hood is connected with a wind pipe 6 provided with a filter screen 5, and the wind pipe is connected with the air inlet of a centrifugal fan 7.

[0029] The guide roller surface of the oxidation furnace is swept by the air knife connected with nitrogen, and the fuzz is collected by the gas collecting hood, so that the technical problems of environmental pollution caused by the scattered fuzz in the air and the health of the operators are solved, the safety hidden trouble problem that the operators or cleaning tools are rolled into the guide roller is solved under the high line speed process condition, the amount of fuzz on the fiber surface can be effectively reduced through the sweeping of the device, especially the temperature of the guide roller of the oxidation furnace is reduced to about 40 DEG C, and the risk that the operators are scalded is solved.

[0030] In the embodiment of the utility model, the gas collecting hood is located above the guide roller of the oxidation furnace, and the cover opening of the gas collecting hood faces downward, and the wind pipe is connected to the top of the gas collecting hood.

[0031] The gas collecting hood is used to suck the fuzz on the surface of the guide roller of the oxidation furnace into the filter screen for collection.

[0032] In the embodiment of the utility model, the wind pipe extends from top to bottom and is connected to the air inlet of the centrifugal fan.

[0033] In the embodiment of the utility model, an exhaust pipe 8 is connected to the exhaust port of the centrifugal fan.

[0034] In the embodiment of the utility model, the filter screen is arranged in front of the air inlet of the centrifugal fan.

[0035] In the embodiment of the utility model, the filter screen has two filter screens arranged in front and back. The filter screen is a 80-mesh 304 stainless steel filter screen, and the filter screen collects the fuzz sucked by the gas collecting hood.

[0036] In the embodiment of the utility model, the frame of the filter screen is made of stainless steel angle steel, and the angle steel is used to bear the frame to prevent the frame from deforming.

[0037] In the embodiment of the utility model, the pipe wall of the air pipe is provided with an openable and closable maintenance opening at the position corresponding to the filter screen, and the lint on the filter screen can be cleaned through the maintenance opening.

[0038] In the embodiment of the utility model, the air knife is 10-20 mm away from the oxidation furnace guide roller, the air knife comprises a gas collecting pipe 9 which is axially parallel to the oxidation furnace guide roller, a narrow air knife slit 10 is formed on the pipe wall of the gas collecting pipe towards the oxidation furnace guide roller along the length direction of the pipe wall, the air knife slit is close to the oxidation furnace guide roller, the width of the air knife slit is about 0.5-1 mm, and a gas pipe is connected to the gas collecting pipe.

[0039] The gas collecting pipe is fixed on an external pipe support.

[0040] In the embodiment of the utility model, the air knife slit has three air knife slits which are distributed in upper, middle and lower positions, the gas pipe comprises three nitrogen branch pipes 11, one end of the three nitrogen branch pipes is connected to the gas collecting pipe, and the other end is connected to the same nitrogen main pipe 12, and the nitrogen main pipe is connected to a nitrogen source.

[0041] The air knife slit blows the surface of the oxidation furnace guide roller along the axial direction of the oxidation furnace guide roller, so as to blow off the lint on the surface of the guide roller and reduce the temperature of the surface of the guide roller.

[0042] In the embodiment of the utility model, a switch valve 13 is arranged on each nitrogen branch pipe, a stop valve 14 and a flow meter are arranged on the nitrogen main pipe, and the nitrogen flow is controlled.

[0043] In the embodiment of the utility model, the frequency of the centrifugal fan is set to 30 HZ, the nitrogen pressure is set to 0.8 MPa, the nitrogen flow is set to 30 Nm 3 / hour, and the oxidation furnace guide roller is continuously blown for 24 hours.

[0044] By comparing the data of manual cleaning, Comparative Example 1 (patent CN201911166455), Comparative Example 2 (patent CN202310845353) and the embodiment of the utility model, the specific parameters are shown in Table 1.

[0045] Table 1

[0046]

[0047] As shown in the above table, the embodiment of the utility model uses three air knife slits for nitrogen blowing, the continuous production time is 24 hours, and the nitrogen pressure is set to 0.8 MPa.

[0048] Compared with manual cleaning, the embodiment of the utility model has the following advantages:

[0049] 1. The amount of carbon fiber lint is reduced by 91.4%, the process conditions of the embodiment of the utility model are the best, and the amount of lint produced by the fiber is the least.

[0050] 2. The temperature of the guide roller is reduced by 51.8%.

[0051] Compared with Comparative Example 1, the following advantages are obtained:

[0052] 1. The amount of carbon fiber fluff is reduced by 90% relatively.

[0053] 2. The temperature of the guide roller is reduced by 51.8%.

[0054] Compared with Comparative Example 2, the following advantages are obtained:

[0055] 1. The number of the sweeping air knives of the utility model embodiment is three linear air knife gaps, while the sweeping of Comparative Example 2 is only one group and is in the form of air hole sweeping, and the sweeping form and the sweeping number of Comparative Example 2 are not as good as those of the utility model embodiment.

[0056] 2. The width of the air knife gap of the utility model embodiment is 0.5 mm, while the sweeping aperture of Comparative Example 2 is 10 mm, and under the same pressure condition, the sweeping coverage area of Comparative Example 2 is not as good as that of the utility model embodiment, and the amount of carbon fiber fluff of the utility model embodiment is reduced by 85% compared with Comparative Example 2, and the sweeping effect of the utility model embodiment is better.

[0057] 3. The distance between the air knife and the oxidation furnace guide roller of the utility model embodiment is 10-20 mm, and the distance between the air outlet hole of Comparative Example 2 and the reciprocating roller is 20-30 mm, and in terms of sweeping distance, Comparative Example 2 is not as close to the guide roller as the utility model embodiment, and the sweeping force of Comparative Example 2 is not as good as that of the utility model embodiment.

[0058] 4. In terms of the roller surface temperature data after sweeping, the roller surface temperature of the utility model embodiment is 41 DEG C, while the roller surface temperature of Comparative Example 2 is 60 DEG C, and the sweeping temperature reduction of the utility model embodiment is lower, which is more beneficial to protect the operating personnel and prevent the operating personnel from being scalded by the guide roller.

[0059] Therefore, the whole technical scheme that the oxidation furnace guide roller surface is swept by the air knife connected with nitrogen and the fluff is collected by the gas collecting hood solves the technical problems that the fluff is scattered in the air to cause environmental pollution and the health of the operating personnel is affected, solves the safety hidden trouble problem that the personnel or cleaning tools are rolled into the guide roller under the high linear speed process condition, and effectively reduces the amount of fluff on the fiber surface through the sweeping of the device, especially reduces the temperature of the oxidation furnace guide roller to about 40 DEG C, and solves the risk that the operating personnel is scalded.

[0060] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution of the present application, and in accordance with the technical essence of the present application, still belong to the protection scope of the technical solution of the present application.

Claims

1. A godet filament cleaning and cooling system for a kiloton carbon fiber wide width oxidizer, characterized by: The gas knife is connected with nitrogen gas source through air pipe, and the air hood is connected with air pipe with filter screen inside, and the air pipe is connected with air inlet of centrifugal fan.

2. The godet filament cleaning and cooling system for a megaton carbon fiber wide width oxidizer as recited in claim 1, wherein: The air hood is above the guide roller of the oxidation furnace, and the cover opening of the air hood faces downward, and the air pipe is connected with the top of the air hood.

3. The godet filament cleaning and cooling system for a megaton carbon fiber wide width oxidizer as recited in claim 2, wherein: The air pipe extends from top to bottom and is connected with the air inlet of the centrifugal fan.

4. The godet filament cleaning and cooling system for a megaton carbon fiber wide width oxidizer as recited in claim 1, wherein: The exhaust pipe is connected with the exhaust outlet of the centrifugal fan.

5. The godet filament cleaning and cooling system for a megaton carbon fiber wide width oxidizer as recited in claim 1, wherein: The filter screen is arranged in front of the air inlet of the centrifugal fan.

6. The godet filament cleaning and cooling system for a megaton carbon fiber wide width oxidizer as recited in claim 1, wherein: The filter screen has two rows and is arranged in front and back.

7. The godet filament cleaning and cooling system for a megaton carbon fiber wide width oxidizer as recited in claim 1, wherein: The pipe wall of the air pipe is provided with switchable maintenance opening corresponding to the filter screen.

8. The godet filament cleaning and cooling system for a megaton carbon fiber wide width oxidizer as recited in claim 1, wherein: The gas knife includes the gas collecting pipe which is axially parallel to the guide roller of the oxidation furnace, and the gas collecting pipe is provided with narrow gas knife slit along the length direction of the pipe wall of the guide roller of the oxidation furnace, and the gas collecting pipe is connected with the air pipe.

9. The godet filament cleaning and cooling system for a megaton carbon fiber wide width oxidizer as recited in claim 8, wherein: The gas knife slit has three rows, and the three rows of gas knife slits are distributed in upper, middle and lower positions, and the air pipe includes three nitrogen gas branch pipes, one end of the three nitrogen gas branch pipes is connected with the gas collecting pipe, and the other end is connected with the same nitrogen gas main pipe, and the nitrogen gas main pipe is connected with the nitrogen gas source.

10. The godet filament cleaning and cooling system for a megaton carbon fiber wide width oxidizer as recited in claim 9, wherein: Switch valves are arranged on the nitrogen gas branch pipes, and a stop valve is arranged on the nitrogen gas main pipe.

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