A continuous carbonization furnace for carbon fiber hard felt

Abstract

The utility model discloses a carbon fiber hard felt continuous carbonization furnace, comprising a main furnace body, an inlet sealed bin and an outlet sealed bin, wherein the main furnace body comprises a heating section, a high temperature section and a cooling section arranged in sequence along the product transmission direction; the inlet sealed bin is arranged at the inlet end of the heating section, and is connected to the heating section; the outlet sealed bin is arranged at the outlet end of the cooling section, and is connected to the cooling section; a linear drive device is arranged in the inlet sealed bin, and the movement direction of the drive end of the linear drive device is arranged along the product transmission direction of the main furnace body. The carbon fiber hard felt continuous carbonization furnace of the utility model reduces the heating time and the cooling time, greatly improves the proportion of the carbonization process time, has high production efficiency, reduces the labor intensity of workers, reduces labor costs, and makes the production process safer.

Description

Technical Field

[0001] The utility model relates to the technical field of carbonization equipment, in particular to a continuous carbonization furnace for carbon fiber hard felt. Background Art

[0002] Carbon fiber felt has the characteristics of low density, high temperature resistance, low thermal expansion coefficient, low thermal conductivity and mechanical properties increasing with temperature, and is suitable for high temperature thermal field, aviation, military, automobile and other fields. The carbonization process in the preparation process of carbon fiber felt is to use a carbonization furnace to heat and decompose the solid or organic matter in the carbon fiber felt under high temperature (800-1200℃) and oxygen-free conditions.

[0003] In the prior art, an industrial monomer carbonization furnace is generally used to make carbon fiber hard felt. During production, the raw materials of carbon fiber hard felt are hoisted into the monomer carbonization furnace by a crane. After loading, the monomer carbonization furnace begins to heat up. After reaching the process temperature, it is kept warm for a certain period of time to thermally decompose the solids or organic matter in the carbon fiber hard felt. At the same time, nitrogen is introduced. The nitrogen takes away the gasified impurities and is sent to the incinerator through a pipeline for incineration. Then the temperature is cooled to room temperature and the furnace is opened for unloading. In order to improve production efficiency, the furnace volume of the monomer carbonization furnace is at least tens of cubic meters, so that a large amount of carbon fiber hard felt to be carbonized can be loaded at one time. The furnace volume is large, loading and unloading is troublesome, the risk is high during the crane hoisting process, and due to the large amount of loading, the product is heated unevenly during the heating process, and the product quality is poor. At the same time, the temperature rise stage in the monomer carbonization furnace needs to rise from room temperature to more than one thousand degrees Celsius, and the temperature rise time is very long; the temperature drop stage needs to drop from high temperature to room temperature, and the temperature drop time is long; the temperature rise time and the temperature drop time are too long, resulting in a low proportion of the actual production process time, a long preparation cycle, and low production efficiency. Utility Model Content

[0004] In view of this, the utility model provides a carbon fiber hard felt continuous carbonization furnace, which reduces the heating time and the cooling time, greatly improves the carbonization process time ratio, has high production efficiency, reduces the labor intensity of workers, reduces labor costs, and makes the production process safer.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A carbon fiber hard felt continuous carbonization furnace, comprising:

[0007] The main furnace body includes a heating section, a high temperature section and a cooling section arranged in sequence along the product transmission direction;

[0008] An inlet sealing chamber, arranged at the inlet end of the temperature rising section and communicated with the temperature rising section;

[0009] An outlet sealing chamber is arranged at the outlet end of the temperature reduction section and is connected to the temperature reduction section;

[0010] A linear drive device is arranged in the inlet sealing bin, and the movement direction of the driving end of the linear drive device is arranged along the product transmission direction of the main furnace body.

[0011] Optionally, both the temperature rising section and the high temperature section of the main furnace body are provided with heating devices;

[0012] The heating device comprises an upper heater and a lower heater, wherein the upper heater is arranged on the top inner wall of the main furnace body, and the lower heater is arranged on the bottom inner wall of the main furnace body;

[0013] A plurality of the upper heaters and the lower heaters are provided, and the plurality of the upper heaters and the lower heaters are evenly distributed along the transport direction of the product.

[0014] Optionally, the temperature reduction section of the main furnace body is provided with a cooling system;

[0015] The cooling system comprises a water cooling section, which comprises a cooling water tower, a water outlet pipe, a cooling water pipe and a water return pipe which are sequentially connected and arranged, the water return pipe is connected to the water return port of the cooling water tower, and a water pump is arranged on the water outlet pipe;

[0016] The cooling water pipe is arranged close to the outer surface of the main furnace body.

[0017] Optionally, the cooling system further includes a natural cooling section, the water cooling section and the natural cooling section are arranged in sequence, and the natural cooling section is arranged at a position of the temperature reduction section close to the high temperature section.

[0018] Optionally, it further comprises a push plate, which is slidably arranged in the main furnace body, and the side wall of the push plate is arranged corresponding to the driving end of the linear drive device.

[0019] Optionally, it further comprises an inlet ventilation chamber and an outlet ventilation chamber, wherein the outlet of the inlet ventilation chamber is communicated with the inlet sealed chamber, and the inlet of the outlet ventilation chamber is communicated with the outlet sealed chamber;

[0020] The inlet ventilation chamber and the outlet ventilation chamber are both provided with observation windows, and the observation windows are provided with tempered glass.

[0021] Optionally, the inlet ventilation chamber is provided with a first inlet propulsion cylinder, and the outlet ventilation chamber is provided with a first outlet propulsion cylinder;

[0022] A first inner gate is provided at a position where the inlet ventilation chamber is connected to the inlet sealing chamber, and a second inner gate is provided at a position where the outlet ventilation chamber is connected to the outlet sealing chamber.

[0023] Optionally, it further comprises an inlet transverse push bin and an outlet transverse push bin, the outlet of the inlet transverse push bin is communicated with the inlet of the inlet ventilation bin, and the inlet of the outlet transverse push bin is communicated with the outlet of the outlet ventilation bin;

[0024] A first outer gate is provided at a position where the inlet transverse push bin is connected to the inlet ventilation bin, and a second outer gate is provided at a position where the outlet transverse push bin is connected to the outlet ventilation bin;

[0025] The outlet of the outlet transverse push bin is communicated with the return track.

[0026] Optionally, it further comprises a nitrogen protection system, which is arranged in the temperature rising section, high temperature section and temperature falling section of the main furnace body;

[0027] The nitrogen protection system comprises a gas source, a gas pipeline and an air inlet pipe which are connected to each other. The gas pipeline is provided with an air pump. The air inlet pipe is connected with the inner cavity of the main furnace body. The outlet of the air inlet pipe is provided with a small hole mesh plate.

[0028] Optionally, it further comprises an exhaust gas emission system, wherein the exhaust gas emission system is arranged in the temperature rising section, the high temperature section and the temperature falling section of the main furnace body;

[0029] The exhaust gas emission system comprises an exhaust pipe, an exhaust pipeline and an exhaust gas treatment device which are connected to each other, and a control valve is arranged on the exhaust pipeline.

[0030] It can be seen from the above technical scheme that the carbon fiber hard felt continuous carbonization furnace provided by the utility model, by setting the main furnace body to be a heating section, a high temperature section and a cooling section arranged in sequence along the product transmission direction, and setting the linear drive device that drives the product movement, so that the product can pass through the heating section, the high temperature section and the cooling section in sequence under the drive of the linear drive device. After the product enters the constant temperature section of the heating section, it directly enters the constant temperature environment for heating. Compared with the monomer carbonization furnace in the prior art that rises from room temperature to a high temperature of more than one thousand degrees, the time consumed for heating is greatly reduced, and the production efficiency is greatly improved. The cooling section is a constant temperature section with a low temperature. After the product enters the cooling section, it directly enters the low temperature environment for cooling. Compared with the monomer carbonization furnace in the prior art that drops from a high temperature of more than one thousand degrees to room temperature, the time consumed for cooling is greatly reduced. By reducing the heating time and the cooling time, the actual carbonization production process time ratio is greatly improved, the preparation cycle is short, and the production efficiency is high. The utility model carbon fiber hard felt continuous carbonization furnace adopts a segmented furnace structure, with a small furnace volume, a small single discharge amount, a more uniform heating of the product, and a better carbonization quality. The utility model carbon fiber hard felt continuous carbonization furnace can realize continuous automatic operation, reduce the labor intensity of workers, reduce labor costs, and does not require large equipment hoisting, and the production process is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the structure of a continuous carbonization furnace for carbon fiber hard felt provided in one embodiment of the utility model;

[0033] Figure 2 A schematic structural diagram of a continuous carbonization furnace for carbon fiber hard felt provided by another embodiment of the utility model;

[0034] Figure 3 A schematic diagram of the internal structure of a main furnace body provided in one embodiment of the utility model;

[0035] Figure 4 A schematic diagram of the internal structure of a main furnace body provided in another embodiment of the utility model;

[0036] Figure 5 A schematic diagram of the structure of a cooling system provided by an embodiment of the utility model;

[0037] Figure 6 A schematic cross-sectional structure diagram of a cooling section of a main furnace body provided in an embodiment of the utility model;

[0038] Figure 7 A schematic diagram of the structure of an air intake pipe provided in one embodiment of the utility model;

[0039] Figure 8 for Figure 7 A schematic diagram of the structure of the intake pipe from another angle;

[0040] Fig. 9 This is a schematic structural diagram of an air intake pipe provided in another embodiment of the utility model.

[0041] in:

[0042] 1. Entrance horizontal push chamber; 2. Second entrance push cylinder; 3. First outer gate; 4. Entrance ventilation chamber; 5. First entrance push cylinder; 6. First inner gate; 7. Entrance sealing chamber; 8. Main push cylinder; 9. First hydraulic station; 10. Heating section; 11. High temperature section; 12. Cooling section; 13. Exit sealing chamber; 14. Second exit push cylinder; 15. Second inner gate; 16. Exit ventilation chamber; 17. First exit push cylinder ; 18. Second outer gate; 19. Exit horizontal push bin; 20. Return propulsion cylinder; 21. Second hydraulic station; 22. Return track; 23. Push plate; 24. Product; 25. Air inlet pipe; 26. Air outlet pipe; 27. Upper heater; 28. Lower heater; 29. ​​Furnace shell; 30. Cooling water pipe; 31. Water outlet pipe; 32. Return water pipe; 33. Cooling water tower; 34. Insulation layer; 35. Small hole mesh plate; 3501. Air outlet. DETAILED DESCRIPTION

[0043] The utility model discloses a continuous carbonization furnace for carbon fiber hard felt, which reduces the heating time and the cooling time, greatly improves the carbonization process time ratio, has high production efficiency, reduces the labor intensity of workers, reduces labor costs, and makes the production process safer.

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] See also Figures 1 to 9 The carbon fiber hard felt continuous carbonization furnace of the utility model comprises a main furnace body, an inlet sealed chamber 7 and an outlet sealed chamber 13. The main furnace body comprises a heating section 10, a high temperature section 11 and a cooling section 12 which are sequentially arranged along the transmission direction of the product 24. The inlet sealed chamber 7 is arranged at the inlet end of the heating section 10 and is connected to the heating section 10; the outlet sealed chamber 13 is arranged at the outlet end of the cooling section 12 and is connected to the cooling section 12. A linear drive device is arranged in the inlet sealed chamber 7, and the movement direction of the drive end of the linear drive device is arranged along the transmission direction of the product 24 of the main furnace body.

[0046] Among them, the function of the temperature rising section 10 is to heat up and discharge exhaust gas, the function of the high temperature section 11 is to sinter the product 24, and the function of the temperature falling section 12 is to cool the product 24. The inlet sealed chamber 7 and the outlet sealed chamber 13 are filled with anti-oxidation gas, and the specific anti-oxidation gas can be nitrogen, which is used to protect the product 24 from oxidation. The product 24 refers to the carbon fiber hard felt raw material to be carbonized. The temperature rising section 10 is a constant temperature section with a higher temperature, and its temperature can be set to the carbonization temperature. The temperature falling section 12 is a constant temperature section with a low temperature, and its temperature can be set to room temperature or slightly higher than room temperature, which is specifically set by the technician according to needs.

[0047] The carbon fiber hard felt continuous carbonization furnace of the utility model is provided with a heating section 10, a high temperature section 11 and a cooling section 12 arranged in sequence along the transmission direction of the product 24 by setting the main furnace body, and providing the linear drive device for driving the movement of the product 24, so that the product 24 can pass through the heating section 10, the high temperature section 11 and the cooling section 12 in sequence under the drive of the linear drive device. After the product 24 enters the constant temperature section of the heating section 10, it directly enters the high temperature environment for heating. Compared with the monomer carbonization furnace in the prior art that rises from room temperature to a high temperature of more than one thousand degrees, the time consumed for heating is greatly reduced, and the production efficiency is greatly improved. The cooling section 12 is a constant temperature section with a low temperature. After the product 24 enters the cooling section 12, it directly enters the low temperature environment for cooling. Compared with the monomer carbonization furnace in the prior art that drops from a high temperature of more than one thousand degrees to room temperature, the time consumed for cooling is greatly reduced. By reducing the heating time and the cooling time, the actual carbonization production process time ratio is greatly improved, the preparation cycle is short, and the production efficiency is high. The utility model carbon fiber hard felt continuous carbonization furnace adopts a segmented furnace structure, the furnace volume is small, the single discharge amount is small, the product 24 is heated more evenly, and the carbonization quality is better. The utility model carbon fiber hard felt continuous carbonization furnace can realize continuous automatic operation, reduce the labor intensity of workers, reduce labor costs, and does not require large equipment hoisting, and the production process is safer.

[0048] In order to maintain the temperature of the product 24, the heating section 10 and the high temperature section 11 of the main furnace body are both provided with a heating device, and the heating device is used to maintain the temperature of the inner cavity of the heating section 10 and the high temperature section 11. In one embodiment, the heating device only includes an upper heater 27, referring to Figure 3 In another embodiment, the heating device includes an upper heater 27 and a lower heater 28, wherein the upper heater 27 is disposed on the top inner wall of the main furnace body, and the lower heater 28 is disposed on the bottom inner wall of the main furnace body. In order to improve the heating efficiency, a plurality of upper heaters 27 and lower heaters 28 are provided, and the plurality of upper heaters 27 and lower heaters 28 are evenly distributed along the transport direction of the product 24, such as Figure 4 The upper heater 27 and the lower heater 28 can be heated by silicon carbon rods. Figure 3 and Figure 4The direction of the arrow in FIG. 2 is the conveying direction of the product 24 .

[0049] In order to maintain the temperature in the cavity of the cooling section 12, the cooling section 12 of the main furnace body is provided with a cooling system. In order to improve the cooling efficiency, the cooling system includes a water cooling section, which includes a cooling water tower 33, a water outlet pipe 31, a cooling water pipe 30 and a water return pipe 32 which are connected in sequence. Figure 5 The return pipe 32 is connected to the return port of the cooling water tower 33, and the outlet pipe 31 is connected to the outlet of the cooling water tower 33. Figure 5 The arrow in the figure indicates the flow direction of cooling water. A water pump (not shown) is provided on the water outlet pipe 31, and the operation of the water pump is controlled by a controller so that the temperature in the cavity of the cooling section 12 is within a set range. An insulation layer 34 is provided outside the furnace shell 29 of the main furnace body, and the cooling water pipe 30 is provided on the outer surface of the furnace shell 29 of the main furnace body, such as Figure 6 As shown, it is convenient to cool the furnace chamber. The insulation layer 34 is a full lightweight insulation material, for example, the insulation layer 34 is a graphite soft felt, which has good insulation performance and good temperature uniformity. In order to increase the service life of the main furnace body, the inner wall of the furnace is covered with a layer of carbon-carbon plate, and the carbon-carbon plate is fixed to the furnace shell 29 through carbon-carbon nuts and graphite ropes.

[0050] In order to prevent the product 24 from cooling down too quickly, the cooling system further includes a natural cooling section, the water cooling section and the natural cooling section are arranged in sequence, and the natural cooling section is arranged at a position of the cooling section 12 close to the high temperature section 11. By arranging the natural cooling section, a natural cooling area is formed, so that the product 24 directly enters the natural cooling area after being sent out from the high temperature section 11, thereby preventing the product 24 from cooling down too quickly and causing cracking and deformation inside the product 24. After the product 24 cools down naturally for a period of time, it enters the water cooling section for cooling, thereby ensuring the quality of the product 24.

[0051] In order to facilitate the transportation of the product 24, the carbon fiber hard felt continuous carbonization furnace of the utility model further includes a push plate 23, which is slidably arranged in the main furnace body, and the side wall of the push plate 23 is arranged corresponding to the driving end of the linear drive device. In one embodiment, the linear drive device is a main push cylinder 8.

[0052] Furthermore, the carbon fiber hard felt continuous carbonization furnace of the utility model also includes an inlet ventilation chamber 4 and an outlet ventilation chamber 16. The outlet of the inlet ventilation chamber 4 is connected to the inlet sealing chamber 7, and the first inner gate 6 is provided at the position where the inlet ventilation chamber 4 and the inlet sealing chamber 7 are connected. After the push plate 23 carrying the product 24 enters the inlet ventilation chamber 4, the first outer gate 3 at the inlet position of the inlet ventilation chamber 4 is closed, and then the gas in the inlet ventilation chamber 4 is replaced, and nitrogen is passed to make the atmosphere in the chamber consistent with the atmosphere in the furnace cavity of the main furnace body. Then the first inner gate 6 is opened, and the push plate 23 carrying the product 24 is pushed into the inlet sealing chamber 7, and then the first inner gate 6 is closed, and the main push cylinder 8 pushes the push plate 23 carrying the product 24 into the main furnace body according to actual work needs. Correspondingly, the inlet of the outlet ventilation chamber 16 is connected to the outlet of the outlet sealing chamber 13, and the second inner gate 15 is provided at the position where the outlet ventilation chamber 16 and the outlet sealing chamber 13 are connected. After the push plate 23 carrying the product 24 is pushed to the outlet sealed chamber 13, the second inner gate 15 is opened to push the push plate 23 into the outlet ventilation chamber 16, while ensuring that the atmosphere in the outlet ventilation chamber 16 is consistent with that in the main furnace body. The second inner gate 15 is closed. In order to facilitate pushing the push plate 23, the outlet sealed chamber 13 is provided with a second outlet propulsion cylinder 14, which is used to push the push plate 23 in the outlet sealed chamber 13 into the outlet ventilation chamber 16.

[0053] In order to facilitate observation of the operation of the product 24, both the inlet ventilation chamber 4 and the outlet ventilation chamber 16 are provided with observation windows, and the observation windows are provided with tempered glass for sealing.

[0054] In order to facilitate pushing the push plate 23, the inlet ventilation chamber 4 is provided with a first inlet propulsion cylinder 5, which facilitates pushing the push plate 23 into the inlet sealing chamber 7. The outlet ventilation chamber 16 is provided with a first outlet propulsion cylinder 17, which facilitates pushing the push plate 23 out of the outlet ventilation chamber 16.

[0055] In one embodiment, the carbon fiber hard felt continuous carbonization furnace of the utility model further includes an inlet horizontal push bin 1 and an outlet horizontal push bin 19, wherein the outlet of the inlet horizontal push bin 1 is connected to the inlet of the inlet ventilation bin 4, and the inlet of the outlet horizontal push bin 19 is connected to the outlet of the outlet ventilation bin 16. A first outer gate 3 is provided at the position where the inlet horizontal push bin 1 is connected to the inlet ventilation bin 4, and a second outer gate 18 is provided at the position where the outlet horizontal push bin 19 is connected to the outlet ventilation bin 16. The outlet of the outlet horizontal push bin 19 is connected to the return track 22, and the push plate 23 in the outlet horizontal push bin 19 is pushed onto the return track 22 by the return propulsion cylinder 20. One end of the return track 22 is docked with the outlet of the outlet horizontal push bin 19, and the other end is docked with the inlet of the inlet horizontal push bin 1. The inlet horizontal push bin 1 is provided with a second inlet propulsion cylinder 2, and the second inlet propulsion cylinder 2 is used to push the push plate 23 in the inlet horizontal push bin 1 into the inlet ventilation bin 4.

[0056] It can be understood that in order to meet the working requirements of each of the above-mentioned cylinders, the carbon fiber hard felt continuous carbonization furnace of the utility model also includes a first hydraulic station 9 and a second hydraulic station 21. The second hydraulic station 21 is arranged at the outlet end of the cooling section 12 close to the main furnace body, and provides the hydraulic oil required for the second outlet propulsion cylinder 14, the first outlet propulsion cylinder 17 and the return propulsion cylinder 20. The first hydraulic station 9 is arranged at the inlet end of the heating section 10 close to the main furnace body, and provides the hydraulic oil required for the second inlet propulsion cylinder 2, the first inlet propulsion cylinder 5 and the main propulsion cylinder 8.

[0057] In order to ensure the atmosphere in the main furnace body and prevent the product 24 from being oxidized, the carbon fiber hard felt continuous carbonization furnace of the utility model also includes a nitrogen protection system, which is arranged in the temperature rising section 10, the high temperature section 11 and the temperature falling section 12 of the main furnace body. Specifically, the nitrogen protection system includes a gas source (not shown in the figure), a gas pipeline (not shown in the figure) and an air intake pipe 25 that are connected and arranged. In order to facilitate the smooth entry of the protective gas nitrogen into the furnace cavity, an air pump is arranged on the gas pipeline, and the air intake pipe 25 is connected to the inner cavity of the main furnace body. The air inlet of the air intake pipe 25 is provided with a small hole mesh plate 35, such as Figure 7 and Fig. 9 As shown. There are multiple air inlet pipes 25, and the multiple air inlet pipes 25 are evenly distributed in the furnace cavity along the transportation direction of the product 24. The air inlet pipes 25 are arranged on both sides of the conveying direction of the push plate 23. Among them, a plurality of air outlet holes 3501 are evenly distributed on the small hole mesh plate 35. By arranging the small hole mesh plate 35 at the outlet position of the air inlet pipe 25, the intake of nitrogen is more stable and uniform. The small hole mesh plate 35 can be welded to the air inlet position of the air inlet pipe 25, such as Figure 7 and Figure 8 As shown, the small hole mesh plate 35 can also be threadedly connected to the air inlet position of the air inlet pipe 25, such as Fig. 9 The gas source and gas pipeline are devices in the prior art and will not be described in detail here.

[0058] In order to facilitate the discharge of exhaust gas, the carbon fiber hard felt continuous carbonization furnace of the utility model also includes an exhaust gas emission system, which is arranged in the heating section 10, the high temperature section 11 and the cooling section 12 of the main furnace body. The exhaust gas emission system includes an exhaust pipe 26, an exhaust pipeline (not shown in the figure) and an exhaust gas treatment device (not shown in the figure) that are connected and arranged, and a control valve is provided on the exhaust pipeline to control the exhaust volume. The exhaust pipe 26 is connected to the furnace cavity. The exhaust pipeline and the exhaust gas treatment device are devices in the prior art and are not described here. In one embodiment, the exhaust pipe 26 is arranged on the top surface of the main furnace body, and the air inlet pipe 25 is arranged on the bottom surface of the main furnace body, so that the protective gas can fill the entire furnace cavity and has a better protective effect.

[0059] The working process of the carbon fiber hard felt continuous carbonization furnace of the utility model is as follows: after the first outer gate 3 is opened, the push plate 23 is pushed to the inlet ventilation chamber 4 by the second inlet propulsion cylinder 2. After the push plate 23 enters the inlet ventilation chamber 4, the first outer gate 3 is closed to replace the gas in the inlet ventilation chamber 4, and nitrogen is passed to make the atmosphere in the chamber consistent with the main furnace body. Then the first inner gate 6 is opened, and the push plate 23 is pushed by the first inlet propulsion cylinder 5 from the inlet ventilation chamber 4 to the inlet sealing chamber 7, and the first inner gate 6 is closed. Then the main push cylinder 8 pushes the push plate 23 in the inlet sealing chamber 7 forward into the heating section 10 of the main furnace body. As the inlet ventilation chamber 4 continuously sends new push plates 23 into the inlet sealing chamber 7, the main push cylinder 8 pushes the push plates 23 forward one by one. The push plate 23 carrying the product 24 enters the heating section 10 of the main furnace body to heat up, remove impurities, and discharge exhaust gas. The inlet pipe 25 is filled with nitrogen, and the outlet pipe 26 discharges waste gas. The upper heater 27 and the lower heater 28 heat, so that the temperature of the heating section 10 of the main furnace body is within a preset range. Specifically, the heating section 10 can be divided into multiple sections of temperature rise with a step-up temperature range as needed, so that the product 24 on the push plate 23 is gradually heated within a suitable temperature gradient. After the push plate 23 enters the high temperature section 11 of the main furnace body, the push plate 23 stays in the high temperature section 11 for a set time, so that the product 24 maintains a high temperature for a period of time and performs a sintering process.

[0060] After sintering is completed, the push plate 23 carrying the product 24 enters the cooling section 12 of the main furnace body. The product 24 first enters the natural cooling section for cooling, then enters the water cooling section for cooling, and gradually cools to the point where it can be discharged. When the push plate 23 is pushed to the outlet sealing bin 13, on the premise that the atmosphere in the outlet ventilation bin 16 is consistent with that in the main furnace body, the second inner gate 15 is opened, and the push plate 23 is pushed into the outlet ventilation bin 16 by the second outlet propulsion cylinder 14. Then the second inner gate 15 is closed, the second outer gate 18 is opened, and the push plate 23 is pushed to the outlet horizontal push bin 19 by the first outlet propulsion cylinder 17. The second outer gate 18 is closed, and the gas in the outlet ventilation bin 16 is replaced so that the nitrogen atmosphere in the outlet ventilation bin 16 is consistent with that in the main furnace body. The conveyor belt in the exit horizontal push bin 19 sends the push plate 23 to the end of the return track 22, and then the return propulsion cylinder 20 pushes the push plate 23 onto the return track 22. Finally, the manipulator removes the product 24 that has completed the carbonization process on the push plate 23, and the idle push plate 23 continues to flow downward along the return track 22 to take over the product 24 from the conveyor line of the previous process.

[0061] The utility model of the carbon fiber hard felt continuous carbonization furnace greatly reduces the time spent on heating up by setting a constant temperature zone to wait for the product 24 to pass through, thereby greatly improving production efficiency. The furnace is small in size, the single discharge volume is small, the frequency is high, and the loading and unloading uses an automated manipulator, which is highly efficient and capable of continuous operation. No large equipment is required during the loading and unloading process, and the risk is low. The loading and unloading stage does not affect the carbonization process of the product, shortening the production time. The single furnace is small in size, and the product is heated more evenly during heating than the large single furnace in the prior art, which can effectively improve the quality of the finished product. The entire process can be automated, greatly reducing labor and reducing costs.

[0062] In the description of this solution, it should be understood that the terms "upper", "lower", "vertical", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this solution.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this solution, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0064] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A continuous carbonization furnace for carbon fiber hard felt, characterized in that: include: The main furnace body includes a temperature rising section, a high temperature section and a temperature falling section arranged in sequence along the product transmission direction; An inlet sealing chamber, arranged at the inlet end of the temperature rising section and communicated with the temperature rising section; An outlet sealing chamber is arranged at the outlet end of the temperature reduction section and is connected to the temperature reduction section; A linear drive device is arranged in the inlet sealing bin, and the movement direction of the driving end of the linear drive device is arranged along the product transmission direction of the main furnace body.

2. The continuous carbonization furnace for carbon fiber hard felt according to claim 1, characterized in that: The temperature rising section and high temperature section of the main furnace body are both provided with heating devices; The heating device comprises an upper heater and a lower heater, wherein the upper heater is arranged on the top inner wall of the main furnace body, and the lower heater is arranged on the bottom inner wall of the main furnace body; A plurality of the upper heaters and the lower heaters are provided, and the plurality of the upper heaters and the lower heaters are evenly distributed along the transport direction of the product.

3. The continuous carbonization furnace for carbon fiber hard felt according to claim 1, characterized in that: The temperature-lowering section of the main furnace body is provided with a cooling system; The cooling system comprises a water cooling section, which comprises a cooling water tower, a water outlet pipe, a cooling water pipe and a water return pipe which are sequentially connected and arranged, the water return pipe is connected to the water return port of the cooling water tower, and a water pump is arranged on the water outlet pipe; The cooling water pipe is arranged close to the outer surface of the main furnace body.

4. The continuous carbonization furnace for carbon fiber hard felt according to claim 3, characterized in that: The cooling system further comprises a natural cooling section. The water cooling section and the natural cooling section are arranged in sequence. The natural cooling section is arranged at a position of the temperature reduction section close to the high temperature section.

5. The continuous carbonization furnace for carbon fiber hard felt according to claim 1, characterized in that: It also includes a push plate, which is slidably arranged in the main furnace body, and the side wall of the push plate is arranged corresponding to the driving end of the linear drive device.

6. The continuous carbonization furnace for carbon fiber hard felt according to claim 1, characterized in that: It also includes an inlet ventilation chamber and an outlet ventilation chamber, wherein the outlet of the inlet ventilation chamber is communicated with the inlet sealed chamber, and the inlet of the outlet ventilation chamber is communicated with the outlet sealed chamber; The inlet ventilation chamber and the outlet ventilation chamber are both provided with observation windows, and the observation windows are provided with tempered glass.

7. The continuous carbonization furnace for carbon fiber hard felt according to claim 6, characterized in that: The inlet ventilation chamber is provided with a first inlet propulsion cylinder, and the outlet ventilation chamber is provided with a first outlet propulsion cylinder; A first inner gate is provided at a position where the inlet ventilation chamber is connected to the inlet sealing chamber, and a second inner gate is provided at a position where the outlet ventilation chamber is connected to the outlet sealing chamber.

8. The continuous carbonization furnace for carbon fiber hard felt according to claim 6, characterized in that: It also includes an inlet transverse push bin and an outlet transverse push bin, wherein the outlet of the inlet transverse push bin is connected to the inlet of the inlet ventilation bin, and the inlet of the outlet transverse push bin is connected to the outlet of the outlet ventilation bin; A first outer gate is provided at a position where the inlet transverse push bin is connected to the inlet ventilation bin, and a second outer gate is provided at a position where the outlet transverse push bin is connected to the outlet ventilation bin; The outlet of the outlet transverse push bin is communicated with the return track.

9. The continuous carbonization furnace for carbon fiber hard felt according to claim 1, characterized in that: It also includes a nitrogen protection system, which is arranged in the temperature rising section, high temperature section and temperature falling section of the main furnace body; The nitrogen protection system comprises a gas source, a gas pipeline and an air inlet pipe which are connected to each other. The gas pipeline is provided with an air pump. The air inlet pipe is connected with the inner cavity of the main furnace body. The outlet of the air inlet pipe is provided with a small hole mesh plate.

10. The continuous carbonization furnace for carbon fiber hard felt according to claim 1, characterized in that: It also includes an exhaust gas emission system, which is arranged in the temperature rising section, high temperature section and temperature falling section of the main furnace body; The exhaust gas emission system comprises an exhaust pipe, an exhaust pipeline and an exhaust gas treatment device which are connected to each other, and a control valve is arranged on the exhaust pipeline.

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