Carbon fiber carbonization furnace and carbon fiber production system
By using the concave-convex and convex combination of silicon carbide or silicon nitride furnace plate and adhesive in the carbon fiber carbide furnace, and strengthening the connection with the pressure plate, the sealing problem of large-width carbonization furnace is solved, and better sealing effect and integrity are achieved.
Patent Information
- Application Number
- CN202510633648.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-16
- Publication Date
- 2025-08-01
AI Technical Summary
It is difficult to achieve good sealing in the splicing position of the large wide carbon fiber carbonization furnace, causing external air to enter the furnace and affect the carbonization effect.
The furnace plate using silicon carbide or silicon nitride material is matched by concave and convexity, and the depression and protrusion are filled with silicate, silicon oxide, boron nitride and silicon carbide or silicon nitride adhesive to form a sealing structure, and is equipped with a press plate to strengthen the connection and improve the sealing property.
It enhances the integrity and sealing of the furnace plate splicing, reduces the possibility of external air entering the carbonization furnace, and ensures the sealing effect of the carbonization process.
Smart Images
Figure CN120401064A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of carbon fiber production equipment, and more specifically, to a carbon fiber carbonization furnace and a carbon fiber production system. Background Art
[0002] High-temperature carbonization is a key process in the production of carbon fibers. The carbonization furnace is an important device for high-temperature carbonization of carbon fibers, and the furnace chamber of the carbonization furnace is a key component. Equipment used for carbon fibers with a wire width of 2 m or less is a small-width carbonization furnace, and equipment used for carbon fibers with a wire width of more than 2 m is a large-width carbonization furnace. Due to the limitations of the manufacturing size process of the furnace plates, the furnace plates cannot be integrally formed into large-size specifications. Therefore, multiple furnace plates need to be spliced to meet the use of large widths. Since carbon fibers need an inert gas atmosphere for carbonization treatment in the furnace chamber of the carbonization furnace, it is necessary to ensure good sealing at the splicing positions of the furnace plates to reduce the entry of external air into the furnace chamber from the splicing positions. Summary of the Invention
[0003] The purpose of this application is to provide a carbon fiber carbonization furnace and a carbon fiber production system to improve the sealing performance at the splicing positions of the furnace plates.
[0004] The embodiments of this application are implemented as follows:
[0005] In a first aspect, an embodiment of this application provides a carbon fiber carbonization furnace, including multiple furnace plates. The material of the furnace plates includes silicon carbide and / or silicon nitride. Adjacent two furnace plates are connected through a sealing structure, and the furnace plates and the sealing structure enclose a circumferentially closed furnace chamber. The sealing structure includes a first protruding portion located on one furnace plate and a recessed portion located on another furnace plate, and further includes a receiving cavity located between the recessed portion and the first protruding portion. The receiving cavity is filled with an adhesive, and the adhesive includes silicate, silicon dioxide, boron nitride, and silicon carbide and / or silicon nitride.
[0006] In the above technical solution, through the concave-convex cooperation between adjacent two furnace plates, not only can the positioning between adjacent two furnace plates be realized, but also a receiving cavity can be formed to fill the adhesive in the receiving cavity. The adhesive disposed in the receiving cavity can adapt to the high-temperature environment during the use of the carbon fiber carbonization furnace, ensuring the bonding effect. And the above adhesive can sinter with silicon carbide or silicon nitride in the furnace plates at high temperature, thereby improving the connection reliability between the two furnace plates, making the carbon fiber carbonization furnace spliced by multiple furnace plates have better integrity, and also making the sealing performance of the sealing structure better, and it is not easy for external air to enter the carbon fiber carbonization furnace through the sealing structure.
[0007] In some alternative embodiments, by weight parts, the binder comprises the following components: 100-500 parts of silicate, 20-120 parts of silicon carbide and / or silicon nitride, 20-140 parts of silicon dioxide, and 20-60 parts of boron nitride.
[0008] The binder components provided by the above technical solution can better adapt to the temperature changes in the carbon fiber carbonization furnace, are not prone to cracking at the connection position due to the temperature changes in the furnace chamber, and reduce the influence of the temperature changes in the furnace chamber on the sealing performance of the sealing structure.
[0009] In some alternative embodiments, the sealing structure further comprises two pressing plates, the material of the pressing plates comprises silicon carbide and / or silicon nitride, and the two pressing plates are located on both sides of the accommodating cavity in the thickness direction of the furnace plate; one side of the pressing plate facing the accommodating cavity comprises a first region and a second region; the first region is connected to one furnace plate, the second region is connected to the other furnace plate, and the two pressing plates and the two furnace plates enclose the accommodating cavity.
[0010] In the above technical solution, the pressing plates and the furnace plates enclose an accommodating cavity filled with the binder. Since the first region on one side of the pressing plate is connected to one furnace plate and the second region is connected to the other furnace plate, the path that the external air needs to pass through to enter the furnace chamber from the sealing structure is increased, and the sealing effect of the sealing structure is improved. And the pressing plates can cover the accommodating cavity, and the binder is not easily detached.
[0011] In some alternative embodiments, the pressing plate comprises a substrate and a second protruding portion, and the first region and the second region are located on the substrate; one end of the second protruding portion is connected to the side of the substrate facing the accommodating cavity to form a T-shaped structure, and the second protruding portion is connected between the first region and the second region; one side of the second protruding portion facing the first region is connected to one furnace plate, and the side facing the second region is connected to the other furnace plate.
[0012] In the above technical solution, the binder can be set first and then the pressing plates. During the process of setting the pressing plates, the second protruding portions of the pressing plates can extrude the binder in the accommodating cavity, so that the binder better fills the accommodating cavity to improve the sealing performance of the sealing structure. And the connection surface for connecting with the furnace plates in the pressing plates is larger. During the process of the pressing plates extruding the binder, the binder can also be extruded into the gap between the connection surface of the pressing plates and the furnace plates, making the connection between the pressing plates and the furnace plates more reliable, the pressing plates are not easily detached, and correspondingly, the binder in the accommodating cavity is also less likely to fall off.
[0013] In some alternative embodiments, the furnace plates and the pressing plates are made by pressing silicon carbide and / or silicon nitride, and the content of silicon carbide and / or silicon nitride is greater than 80%.
[0014] In the above technical solution, the content of silicon carbide and / or silicon nitride in the furnace plate and the pressing plate is greater than 80%, which can make the contact positions of the adhesive with the furnace plate and the pressing plate more likely to have a ceramic-like structure after high temperature, and further make the connection effect of the adhesive better and the sealing performance of the sealing structure better.
[0015] In some alternative embodiments, the side of the first protrusion facing the accommodation cavity is a first arc surface; the side of the recess facing the accommodation cavity is a second arc surface.
[0016] In the above technical solution, since the sides of the first protrusion and the recess facing the accommodation cavity are both arc surfaces, it can play a certain positioning role when two furnace plates are spliced. In addition, the thermal expansion of the arc structure applies force or receives force from the center point to the surroundings. The center point is at the deepest or highest point of the arc structure, which can make the force expand from the center of the furnace plate to the surroundings, making the furnace plate more evenly stressed during thermal expansion and not easily causing the adhesive to fall off.
[0017] In some alternative embodiments, the diameter of the first arc surface is smaller than the diameter of the second arc surface.
[0018] In the above technical solution, in the high-temperature environment of the carbon fiber carbonization furnace, the sealing structure expands due to heat, which can make the adhesive better cover the first protrusion and not easily fall off.
[0019] In some alternative embodiments, it further includes a support plate located in the furnace chamber. One side of the support plate is in contact with the top wall of the furnace chamber, and the other side is in contact with the bottom wall of the furnace chamber to support the furnace plate located above the furnace chamber; the sealing structure and the support plate both extend along the length direction of the carbon fiber carbonization furnace; and at least one of the sealing structures is covered on one side surface of the support plate.
[0020] In the above technical solution, the support plate can not only support the furnace plate located above, but also reduce the situation of air entering the furnace chamber from the sealing structure by covering the sealing structure on the surface of the support plate.
[0021] In some alternative embodiments, one side surface of the support plate covers one of the sealing structures located above the furnace chamber, and the other opposite side surface covers one of the sealing structures located below the furnace chamber.
[0022] In the above technical solution, the support plate can cover both the sealing structure located above the furnace chamber and the sealing mechanism located below the furnace chamber at the same time.
[0023] In a second aspect, an embodiment of the present application provides a carbon fiber production system, including the carbon fiber carbonization furnace provided in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following accompanying drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related accompanying drawings can also be obtained based on these drawings.
[0025] Figure 1 Schematic diagram of the usage state of the carbon fiber carbonization furnace provided by the embodiment of the present application;
[0026] Figure 2 For Figure 1 Schematic diagram at position A in
[0027] Figure 3 For Figure 1 Schematic diagram at position B in
[0028] Figure 4 End face schematic diagram of the pressing plate provided by the embodiment of the present application;
[0029] Figure 5 Schematic diagram of the first furnace plate provided by the embodiment of the present application;
[0030] Figure 6 Schematic diagram of the second furnace plate provided by the embodiment of the present application;
[0031] Figure 7 Schematic diagram of the third furnace plate provided by the embodiment of the present application.
[0032] Icon: 100 - furnace plate; 110 - first protrusion; 120 - depression; 200 - tow; 300 - adhesive; 400 - furnace chamber; 500 - pressing plate; 510 - substrate; 511 - first region; 512 - second region; 520 - second protrusion; Specific embodiments
[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations.
[0034] Accordingly, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.
[0035] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0036] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of this application are customarily placed during use. It is only for the convenience of describing the present application 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 should not be construed as a limitation to the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.
[0037] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0038] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
[0039] The embodiments of the present application provide a carbon fiber carbonization furnace, as Figure 1 shown, including multiple furnace plates 100. Adjacent two furnace plates 100 are connected through a sealing structure. The furnace plates 100 and the sealing structure enclose a circumferentially closed furnace chamber 400. The inside of the furnace chamber 400 is a high-temperature environment for carbonizing the passing tow 200. Figure 1 The shown carbon fiber carbonization furnace is of a spliced structure. Therefore, the size of the carbon fiber carbonization furnace provided by the present application is not limited by the manufacturing size process of the furnace plates 100, and can achieve a relatively large size, such as a size of more than two meters, that is, Figure 1The size of the carbon fiber carbonization furnace shown in the direction indicated by arrow X can be greater than two meters. Further, the size in the direction indicated by arrow Y can also be greater than two meters.
[0040] In some embodiments, such as Figure 2 or Figure 3 as shown, the sealing structure includes a first protrusion 110 on one furnace plate 100 and a recessed portion 120 on another furnace plate 100, and further includes a receiving cavity between the recessed portion 120 and the first protrusion 110, and the receiving cavity is filled with an adhesive 300. The first protrusion 110 of one furnace plate 100 and the recessed portion 120 of another adjacent furnace plate 100 can be connected under the action of the adhesive 300, and then assembled into a carbon fiber carbonization furnace. Since the first protrusion 110 and the recessed portion 120 participate in enclosing the receiving cavity, the adhesive 300 is not easily detached in the receiving cavity, and the adjacent two furnace plates 100 can achieve concave-convex fit through the first protrusion 110 and the recessed portion 120, which is convenient for positioning the furnace plates 100 during the splicing process.
[0041] In some embodiments, the adhesive 300 includes silicate, silicon dioxide, boron nitride, and silicon carbide or / and silicon nitride. This kind of adhesive 300 has a high silicon content, so it has a small expansion coefficient. In the case of temperature changes in the carbon fiber carbonization furnace, the deformation amount of the adhesive 300 is small, and it is not easy to have gaps at the sealing position. Furthermore, the carbon fiber carbonization furnace obtained by splicing can have better sealing performance. The silicate includes at least one of sodium silicate, aluminum silicate, and magnesium silicate.
[0042] In some embodiments, the material of the furnace plate 100 includes silicon carbide or / and silicon nitride. In this embodiment, the components in the adhesive 300 and the silicon carbide or / and silicon nitride in the furnace plate 100 can form the raw materials for sintered ceramics, and the temperature during the use of the carbon fiber carbonization furnace can reach 1400 °C or even above 1600 °C. Therefore, in the carbon fiber carbonization furnace provided in this embodiment during use, the adhesive 300 can be sintered with the silicon carbide or silicon nitride in the furnace plate 100 at high temperature to form a ceramic-like material, thereby improving the connection reliability between the two furnace plates 100, making the integrity of the carbon fiber carbonization furnace obtained by splicing multiple furnace plates 100 better, and also making the sealing performance of the sealing structure better, and external air is not easily introduced into the carbon fiber carbonization furnace through the sealing structure.
[0043] Further, in some embodiments, by weight parts, the components of the adhesive 300 are: 100-500 parts of silicate, specifically 100 parts, 200 parts, 300 parts, 400 parts, 500 parts; 20-140 parts of silicon dioxide, specifically 20 parts, 40 parts, 60 parts, 80 parts, 100 parts, 120 parts, 140 parts; 20-60 parts of boron nitride, specifically 20 parts, 30 parts, 40 parts, 50 parts, 60 parts; 20-120 parts of silicon carbide and / or silicon nitride, specifically 20 parts, 40 parts, 60 parts, 80 parts, 100 parts, 120 parts of silicon carbide, or 20 parts, 40 parts, 60 parts, 80 parts, 100 parts, 120 parts of silicon nitride, or 20 parts, 40 parts, 60 parts, 80 parts, 100 parts, 120 parts in total of silicon carbide and silicon nitride. In this embodiment, the deformation amount of the adhesive 300 under temperature change is smaller. Therefore, it can better adapt to the temperature change in the carbon fiber carbonization furnace, and it is not easy to crack at the connection position due to the temperature change in the furnace chamber 400, reducing the influence of the temperature change in the furnace chamber 400 on the sealing performance of the sealing structure. In other embodiments, the content of each component can also be outside the above range.
[0044] Further, the application method of the above-mentioned adhesive 300 can be to form a paste by adding water and then apply it in the accommodation cavity, or it can be first set in the accommodation cavity and then water is added for stirring. The adhesive 300 can also be applied in the accommodation cavity in other ways, as long as the adhesive 300 can play the role of connecting two adjacent furnace plates 100.
[0045] In some embodiments, the sealing structure further includes two pressing plates 500, and the two pressing plates 500 are located on both sides of the accommodation cavity in the thickness direction of the furnace plate 100. As Figures 2 to 4 shown, one side of the pressing plate 500 facing the accommodation cavity includes a first region 511 and a second region 512; the first region 511 is connected to one furnace plate 100, the second region 512 is connected to the other furnace plate 100, and the two pressing plates 500 and the two furnace plates 100 enclose the accommodation cavity. As Figures 2 to 4 shown, since the first region 511 is connected to one furnace plate 100 and the second region 512 is connected to the other furnace plate 100, the external air needs to first pass through the gap between the connection surface of the pressing plate 500 and the furnace plate 100, then pass through the accommodation cavity, and then pass through the gap between the connection surface of the other pressing plate 500 and the furnace plate 100 before finally entering the furnace chamber 400. Among them, the connection surface of the pressing plate 500 is: the surface of the pressing plate 500 that is connected to the furnace plate 100 through the adhesive 300. Therefore, this embodiment increases the path that the external air needs to pass through from the sealing structure into the furnace chamber 400, improving the sealing effect of the sealing structure. And the pressing plate 500 can cover the accommodation cavity, making the adhesive 300 not easy to fall off.
[0046] Further, the material of the pressing plate 500 includes silicon carbide and / or silicon nitride. Specifically, it may include silicon carbide but not silicon nitride, or it may include silicon nitride but not silicon carbide, or it may include both silicon carbide and silicon nitride. In the carbon fiber carbonization furnace provided by this embodiment, during use, the adhesive 300 can be sintered with silicon carbide or silicon nitride in the pressing plate 500 at high temperature to form a ceramic-like material, thereby improving the connection reliability between the adhesive 300 and the pressing plate 500 and making it difficult for the adhesive 300 to fall off.
[0047] Further, in some embodiments, as Figure 4 shown, the pressing plate 500 includes a substrate 510 and a second protrusion 520. The first region 511 and the second region 512 are located on the substrate 510. One end of the second protrusion 520 is connected to the side of the substrate 510 facing the accommodation cavity to form a T-shaped structure, and the second protrusion 520 is connected between the first region 511 and the second region 512. Please refer to Figure 3 , the second protrusion 520 of the pressing plate 500 extends into the gap between two adjacent furnace plates 100 in the direction indicated by the arrow X. The side of the second protrusion 520 facing the first region 511 is connected to one furnace plate 100, and the side facing the second region 512 is connected to the other furnace plate 100. At other positions of the carbon fiber carbonization furnace, it may also be that the second protrusion 520 of the pressing plate 500 extends into the gap between two adjacent furnace plates 100 in the direction indicated by the arrow Y.
[0048] In Figure 1 , Figure 3 and Figure 4 the embodiment shown, the connection surface of the pressing plate 500 for connecting the furnace plates 100 is larger. The connection surface includes the first region 511 and the second region 512 of the substrate 510, the two side surfaces of the substrate 510 in the direction of the arrow X, and Figure 3On both sides of the second protrusion 520 of the pressing plate 500 in the direction of arrow X. When setting the pressing plate 500, the second protrusion 520 of the pressing plate 500 can extrude the adhesive 300 in the accommodating cavity, so that the adhesive 300 can better fill the accommodating cavity, thereby improving the sealing performance of the sealing structure. And during the process of the pressing plate 500 extruding the adhesive 300, the adhesive 300 can be extruded into the gap between the connecting surface of the pressing plate 500 and the furnace plate 100, and then the pressing plate 500 and the furnace plate 100 are also connected from this position, making the connection between the pressing plate 500 and the furnace plate 100 more reliable, and the pressing plate 500 is not easily detached. Correspondingly, the adhesive 300 in the accommodating cavity is also less likely to fall off. Further, when the gap between the connecting surface of the pressing plate 500 and the furnace plate 100 is filled with the adhesive 300, the shrinkage and expansion of the furnace plate 100 and the adhesive 300 under temperature changes can also be realized, thereby reducing the occurrence of gaps between the adhesive 300 and the furnace plate 100, or between the adhesive 300 and the pressing plate 500, or inside the adhesive 300.
[0049] In the above embodiment, as Figure 4 shown, the pressing plate 500 is a strip-shaped structure with a "convex" cross-section. In other embodiments, the pressing plate 500 can also be a strip-shaped structure with a rectangular cross-section.
[0050] Further, the furnace plate 100 and the pressing plate 500 are structural members made by pressing silicon carbide and / or silicon nitride, and the content of silicon carbide and / or silicon nitride is greater than 80%, specifically, it can be 85%, 90%, 95%, or even more than 95%. Since the pressing plate 500 and the furnace plate 100 are structural members obtained by pressing, and the content of silicon carbide or silicon nitride is greater than 80%, the high-temperature resistance of the pressing plate 500 and the furnace plate 100 can reach 1600°C or even higher, and they can withstand the high temperature of the furnace chamber 400; the normal-temperature compressive strength can be greater than 70 MPa, and can even reach 120 MPa or higher; the normal-temperature flexural strength is greater than 30 MPa, and can even reach 60 MPa or higher, so as to meet the strength requirements of the carbon fiber carbonization furnace.
[0051] In some embodiments, as Figures 5 to 7As shown, the side of the first protrusion 110 facing the accommodation cavity is a first arc surface, and the side of the recess 120 facing the accommodation cavity is a second arc surface. When the dimensions in the thickness direction of the furnace plate 100 are the same, the first protrusion 110 and the side of the recess 120 facing the accommodation cavity being arc surfaces can result in a larger contact area between the first protrusion 110 and the recess 120 and the adhesive 300 in the accommodation cavity compared to being flat surfaces, making the connection effect between the furnace plates 100 better and the sealing effect at the sealing position better. In addition, the first arc surface and the second arc surface can play a positioning role when splicing the furnace plates 100, and the thermal expansion of the arc structure applies or receives force from the center point to the surroundings. The center point is at the lowest or highest point of the arc structure, enabling the force to expand from the center of the furnace plate 100 to the surroundings, making the furnace plate 100 more evenly stressed during thermal expansion and less likely to have the adhesive 300 fall off.
[0052] Furthermore, the diameters of the first arc surface and the second arc surface can be the same or different. When the diameter of the first arc surface is smaller than that of the second arc surface, after the sealing structure is heated, the expanded adhesive 300 can better cover the first protrusion 110, making the connection effect between the two furnace plates 100 better.
[0053] In the embodiments of the present application, the shapes and sizes of two adjacent furnace plates 100 can be the same or different. As Figure 1 shown, the furnace chamber 400 includes a top wall formed by two larger furnace plates 100, a bottom wall formed by four smaller furnace plates 100, and one medium-sized furnace plate 100 on each side of the furnace chamber 400 as side walls.
[0054] In the embodiments of the present application, as Figure 7 shown, a furnace plate 100 can only have the first protrusion 110; it can also only have the recess 120; or as Figure 5 and 6 shown, it can have both the first protrusion 110 and the recess 120 at the same time.
[0055] In some embodiments, as Figure 1 and Figure 3 shown, a support plate 600 is further provided in the furnace chamber 400. One side of the support plate 600 contacts the top wall of the furnace chamber 400, and the other side contacts the bottom wall of the furnace chamber 400 to support the furnace plate 100 located above the furnace chamber 400, thereby improving the structural strength of the carbon fiber carbonization furnace. Further, both the sealing structure and the support plate 600 extend along the length direction of the carbon fiber carbonization furnace; and at least one sealing structure covers one side surface of the support plate 600. Among them, the length direction of the carbon fiber carbonization furnace is the direction in which the tow 200 passes through the furnace chamber 400, and this direction is perpendicular to Figure 1The direction indicated by arrow X is also perpendicular to the direction indicated by arrow Y. By covering the sealing structure on one side surface of the support plate 600, as Figure 3 shown, it can increase the difficulty for external air to enter the furnace chamber 400 from the gap between the contact surface of the pressing plate 500 and the furnace plate 100, thereby improving the sealing performance of the carbon fiber carbonization furnace.
[0056] In Figure 1 the Figure 3 embodiment shown, one side surface of the support plate 600 covers a sealing structure located above the furnace chamber 400, and the other opposite side surface covers a sealing structure located below the furnace chamber 400. The acting force between the support plate 600 and the upper furnace plate 100 comes from the gravity of the furnace plate 100. The size of the upper furnace plate 100 is relatively large, so it can make there be sufficient pressure between the support plate 600 and the upper furnace plate 100 to reduce the gap between the support plate 600 and the upper furnace plate 100, thereby reducing the air entering the furnace chamber 400 from the sealing structure; the acting force between the support plate 600 and the lower furnace plate 100 comes from the gravity of the support plate 600 and the gravity of the upper furnace plate 100, so it can make there be sufficient pressure between the support plate 600 and the lower furnace plate 100 to reduce the gap between the support plate 600 and the lower furnace plate 100, thereby reducing the air entering the furnace chamber 400 from the sealing structure.
[0057] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.
Claims
1. A carbon fiber carbonization furnace, characterized in that, It includes multiple furnace plates. The material of the furnace plates includes silicon carbide and / or silicon nitride. Adjacent two furnace plates are connected through a sealing structure, and the furnace plates and the sealing structure enclose a circumferentially closed furnace chamber. The sealing structure includes a first protruding portion located on one furnace plate and a recessed portion located on another furnace plate, and further includes a receiving cavity located between the recessed portion and the first protruding portion. The receiving cavity is filled with an adhesive, and the adhesive includes silicate, silicon dioxide, boron nitride, and silicon carbide and / or silicon nitride.
2. The carbon fiber carbonization furnace according to claim 1, characterized in that, By weight parts, the adhesive includes the following components: 100 - 500 parts of silicate, 20 - 120 parts of silicon carbide and / or silicon nitride, 20 - 140 parts of silicon dioxide, and 20 - 60 parts of boron nitride.
3. The carbon fiber carbonization furnace according to claim 1, characterized in that, The sealing structure further includes two pressing plates. The material of the pressing plates includes silicon carbide and / or silicon nitride. The two pressing plates are located on both sides of the receiving cavity in the thickness direction of the furnace plate. One side of the pressing plate facing the receiving cavity includes a first region and a second region. The first region is connected to one furnace plate, and the second region is connected to another furnace plate. The two pressing plates and the two furnace plates enclose the receiving cavity.
4. The carbon fiber carbonization furnace according to claim 3, characterized in that, The pressing plate includes a substrate and a second protruding portion. The first region and the second region are located on the substrate. One end of the second protruding portion is connected to the side of the substrate facing the receiving cavity to form a T-shaped structure, and the second protruding portion is connected between the first region and the second region. One side of the second protruding portion facing the first region is connected to one furnace plate, and the side facing the second region is connected to another furnace plate.
5. The carbon fiber carbonization furnace according to claim 3 or 4, characterized in that, The furnace plate and the pressing plate are formed by pressing silicon carbide and / or silicon nitride, and the content of silicon carbide and / or silicon nitride is greater than 80%.
6. The carbon fiber carbonization furnace according to claim 1, characterized in that, One side of the first protruding portion facing the receiving cavity is a first arc surface; one side of the recessed portion facing the receiving cavity is a second arc surface.
7. The carbon fiber carbonization furnace according to claim 6, characterized in that, The diameter of the first arc surface is smaller than the diameter of the second arc surface.
8. The carbon fiber carbonization furnace according to claim 1, characterized in that, It further includes a support plate located in the furnace chamber. One side of the support plate contacts the top wall of the furnace chamber, and the other side contacts the bottom wall of the furnace chamber to support the furnace plate located on the upper side of the furnace chamber. The sealing structure and the support plate both extend along the length direction of the carbon fiber carbonization furnace. And at least one sealing structure is covered on one side surface of the support plate.
9. The carbon fiber carbonization furnace according to claim 8, characterized in that, One side surface of the support plate covers one sealing structure located on the upper side of the furnace chamber, and the other opposite side surface covers one sealing structure located on the lower side of the furnace chamber.
10. A carbon fiber production system, characterized in that, It includes the carbon fiber carbonization furnace according to any one of claims 1 - 9.