Furnace core structure and graphitization furnace

Abstract

The invention relates to the technical field of graphitization furnaces, and discloses a furnace core structure and a graphitization furnace, the furnace core structure comprises a frame structure, and the projection of the frame structure on the horizontal plane comprises a first side line and a second side line which are perpendicular to each other; the first box plate is mounted on the peripheral wall of the frame structure to form a raw material cavity in the middle of the frame structure; the projection of the first box plate on the horizontal plane coincides with the first sideline or the second sideline. The second box plate is installed in the raw material cavity, the projection of the second box plate on the horizontal plane is configured as a second line segment, and the included angle between the second line segment and the first side line is an acute angle or the included angle between the second line segment and the second side line is an acute angle; the frame structure, the first box plate and the second box plate are all conductors. According to the furnace core structure disclosed by the invention, more uniform temperature distribution in the raw material cavity can be realized, and a local overheating phenomenon is avoided, so that the uniformity of graphitization reaction is improved, the furnace spraying risk is reduced, the energy utilization efficiency is improved, the production fault is reduced, and the reliability and continuity of overall production are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of graphitization furnaces, and particularly to a furnace core structure and a graphitization furnace. Background Art

[0002] The graphitization furnace is the core equipment in the graphite production process, mainly used for high-temperature graphitization treatment of carbon materials. At present, box-type graphitization furnaces are widely used, and common furnace core structures include aisle type, nine-square grid type, etc. However, the current furnace core structures have problems such as uneven heating, poor stability, and easy furnace spraying in the later stage. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a furnace core structure with uniform heating, good stability, and low risk of furnace spraying.

[0004] The present invention also provides a graphitization furnace equipped with the above furnace core structure.

[0005] According to the furnace core structure of the first aspect embodiment of the present invention, it includes: A frame structure, the projection of the frame structure on the horizontal plane includes a first side line and a second side line that are perpendicular to each other; A first box plate, installed on the outer peripheral wall of the frame structure to form a raw material cavity in the middle of the frame structure; the projection of the first box plate on the horizontal plane coincides with the first side line or the second side line; A second box plate, installed in the raw material cavity, the projection of the second box plate on the horizontal plane is configured as a second line segment, and the included angle between the second line segment and the first side line is an acute angle, or the included angle between the second line segment and the second side line is an acute angle; Wherein, the frame structure, the first box plate, and the second box plate are all conductors.

[0006] According to the furnace core structure of the embodiment of the present invention, it has at least the following beneficial effects: The included angle between the projection of the second box plate in the raw material cavity on the horizontal plane and the first side line or the second side line is an acute angle, which means that the second box plate is not perpendicular to the inner side wall of the raw material cavity, and the second box plate is inclined in the raw material cavity. The inclined second box plate can make the temperature distribution in the raw material cavity more uniform, avoid local overheating, and improve the uniformity of the graphitization reaction.

[0007] According to some embodiments of the present invention, the frame structure includes a first column, and the projection of the first column on the horizontal plane coincides with the first side line or the second side line; The conductivity of the first column is less than or equal to the conductivity of the second box plate.

[0008] According to some embodiments of the present invention, the core structure further includes a second column, the second column is located in the raw material chamber, and the second box plate is connected to the second column; The conductivity of the second column is greater than or equal to the conductivity of the first column.

[0009] According to some embodiments of the present invention, the conductivity of the first box plate is less than or equal to the conductivity of the second box plate, and / or the thickness of the first box plate is less than or equal to the thickness of the second box plate.

[0010] According to some embodiments of the present invention, the second box plate includes a central region and an edge region, and the edge region surrounds the outer periphery of the central region; the thickness of the central region is greater than the thickness of the edge region.

[0011] According to some embodiments of the present invention, the height of the second box plate in the vertical direction is less than or equal to the height of the first box plate in the vertical direction.

[0012] According to some embodiments of the present invention, a plurality of the second box plates are installed in the raw material chamber to divide the raw material chamber into a plurality of filling spaces; The projections of the plurality of second box plates on the horizontal plane are parallel or intersecting.

[0013] According to some embodiments of the present invention, the core structure further includes a third box plate and a fourth box plate, the third box plate is installed at the top of the frame structure, and the fourth box plate is installed at the bottom of the frame structure.

[0014] According to the graphitization furnace of the second aspect of the present invention, it includes: A furnace body, the furnace body is provided with a furnace chamber, and a first electrode and a second electrode are respectively installed at both ends in the length direction of the furnace chamber; The above-mentioned core structure is installed in the furnace chamber, and both ends of the core structure are electrically connected to the first electrode and the second electrode respectively.

[0015] According to some embodiments of the present invention, a heat insulation structure is laid between the outer surface of the core structure and the inner surface of the furnace chamber.

[0016] According to the graphitization furnace of the embodiments of the present invention, it has at least the following beneficial effects: Since the above-mentioned core structure heats the raw materials more evenly, the temperature difference at each position in the furnace chamber is smaller, thereby reducing the risk of furnace explosion. While ensuring the product quality, the highest temperature in the furnace chamber can also be set lower, so as to more efficiently utilize energy, reduce energy waste caused by uneven heat distribution, reduce production costs and production failures caused by temperature fluctuations, and improve the reliability and continuity of overall production.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0018] The present invention will be further described below in conjunction with the drawings and embodiments, where: Figure 1 It is the first installation schematic diagram of the second box board of the furnace core structure according to the embodiment of the first aspect of the present invention; Figure 2 It is the second installation schematic diagram of the second box board of the furnace core structure according to the embodiment of the first aspect of the present invention; Figure 3 It is the third installation schematic diagram of the second box board of the furnace core structure according to the embodiment of the first aspect of the present invention; Figure 4 It is the structure schematic diagram of the graphitization furnace according to the embodiment of the second aspect of the present invention; Figure 5 It is Figure 4 The structure schematic diagram in the A-A direction in

[0019] Reference numerals in the drawings: Frame structure 100, first column 110, third box board 120, fourth box board 130; First box board 200; Second box board 300; Second column 400; Furnace body 500, furnace cavity 510, first electrode 511, second electrode 512, heat preservation structure 520. Detailed Embodiments

[0020] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0021] In the description of the present invention, it should be understood that for the orientation description, such as up, down, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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 limiting the present invention.

[0022] In the description of the present invention, "a plurality of" means more than two. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0024] Referring to Figures 1 to 5 , the core structure of the first aspect embodiment of the present invention includes a frame structure 100, a first box plate 200, and a second box plate 300. The frame structure 100 includes a first column 110, and a plurality of first columns 110 are erected to form the frame structure 100; the first box plate 200 is installed on the outer peripheral wall of the frame structure 100 to form a raw material cavity in the middle of the frame structure 100, and the second box plate 300 is installed in the raw material cavity; wherein, the frame structure 100, the first box plate 200, and the second box plate 300 are all conductors, for example, all made of graphite material. The raw material cavity is used to store graphitization raw materials. When an electric current passes through the frame structure 100, the first box plate 200, and the second box plate 300, the frame structure 100, the first box plate 200, and the second box plate 300 will all generate heat to heat the graphitization raw materials stored in the raw material cavity.

[0025] Referring to Figure 5 As shown, the core structure of the embodiment of the present invention further includes a third box plate 120 and a fourth box plate 130. The third box plate 120 is installed at the top of the frame structure 100 to close the top of the raw material cavity; the fourth box plate 130 is installed at the bottom of the frame structure 100 to close the bottom of the raw material cavity; the third box plate 120 and the fourth box plate 130 are also preferably conductors, and the conductivity of the third box plate 120, the fourth box plate 130, and the first box plate 200 is preferably the same, and the same material is used to reduce production costs.

[0026] Referring to Figures 1 to 3 As shown, the projection of the frame structure 100 on the horizontal plane is a rectangle, including a first side line and a second side line perpendicular to each other. The first box plate 200 is installed on the outer peripheral wall of the frame structure 100, so the projection of the first box plate 200 on the horizontal plane coincides with the first side line or the second side line; the second box plate 300 is installed in the raw material cavity. It is defined that the projection of the second box plate 300 on the horizontal plane is configured as a second line segment, then the included angle between the second line segment and the first side line is an acute angle, or the included angle between the second line segment and the second side line is an acute angle; Referring to Figures 1 to 3, when viewed from the top-down perspective, the second box plate 300 is not perpendicular to the inner wall of the raw material cavity. The second box plate 300 is inclined in the raw material cavity, and the inclination angle of the second box plate 300 can be set according to the actual situation and is not limited in this embodiment.

[0027] Furthermore, a plurality of second box plates 300 are installed in the raw material cavity to divide the raw material cavity into a plurality of filling spaces. The projections of the plurality of second box plates 300 on the horizontal plane are parallel or intersecting, and the volumes of the plurality of filling spaces can be equal or unequal, which is not limited in this embodiment. The specific arrangement of the plurality of second box plates 300 can refer to Figures 1 to 3 the arrangement method, which is not limited in this embodiment. The projection of the frame structure 100 of this embodiment on the horizontal plane includes two parallel first side lines and two parallel second side lines. Currently, the arrangement of the second box plate 300 is usually perpendicular to the first side line or the second side line. In this embodiment, the inclined second box plate 300 disrupts the current flow path between the two first side lines, realizing a more uniform temperature distribution in the raw material cavity, avoiding local overheating phenomena, and improving the uniformity of the graphitization reaction.

[0028] In the embodiment of the present invention, the projection of the first upright column 110 on the horizontal plane coincides with the first side line or the second side line, and the conductivity of the first upright column 110 is less than or equal to the conductivity of the second box plate 300. Preferably, the conductivity of the first upright column 110 is less than the conductivity of the second box plate 300. Thus, after power-on, the current passing through the second box plate 300 will be greater than the current passing through the first upright column 110, causing more heat to be generated in the raw material cavity and improving the heating efficiency of the raw material. Correspondingly, the conductivity of the first upright column 110 can be set to be the same as the conductivity of the first box plate 200, that is, the conductivity of the first box plate 200 is also preferably less than the conductivity of the second box plate 300 to increase the current passing through the second box plate 300.

[0029] Refer to Figure 2 、 Figure 3 As shown in

[0030] As can be seen from the above, the first box plate 200 is disposed on the outer peripheral wall of the frame structure 100. Therefore, the heat generated by the energization of the first box plate 200 will be dissipated to both the side facing the raw material chamber and the side facing away from the raw material chamber at the same time; the second box plate 300 is completely located within the raw material chamber, and the heat generated by the energization of the second box plate 300 will be concentrated within the raw material chamber. Therefore, by making the calorific value of the energization of the second box plate 300 greater than the calorific value of the energization of the first box plate 200, energy waste can be reduced. By increasing the conductivity of the second box plate 300 or increasing the thickness of the second box plate 300, the current passing through the second box plate 300 can be increased, so that the calorific value of the second box plate 300 increases and is concentrated within the raw material chamber, thereby reducing energy waste. To increase the current passing through the second box plate 300, any one of the solutions of increasing the conductivity of the second box plate 300 or increasing the thickness of the second box plate 300 can be adopted, or the above two solutions can be adopted simultaneously.

[0031] Further, referring to Figures 1 to 3 As shown, in this embodiment, the second box plate 300 includes a central region and an edge region, and the edge region surrounds the outer periphery of the central region; the edge region of the second box plate 300 is mainly used for connecting with the first column 110 or the second column 400. The current usually flows through the second box plate 300 along the shortest path. Therefore, the calorific value of the central region of the second box plate 300 is usually less than that of the edge region. To balance the calorific value of the central region and the edge region, it is preferred that the thickness of the central region is greater than the thickness of the edge region. By increasing the thickness of the central region of the second box plate 300, the conductivity of the central region of the second box plate 300 can be increased, so that more current passes through the central region of the second box plate 300, thereby balancing the calorific value of the central region and the edge region, making the heat generation at each position of the second box plate 300 uniform, and further improving the uniformity of the temperature at each position within the raw material chamber.

[0032] In the embodiment of the present invention, the height of the second box plate 300 in the vertical direction is less than or equal to the height of the first box plate 200 in the vertical direction. Specifically, the height of the first box plate 200 in the vertical direction can be set to be equal to the height of the first column 110 in the vertical direction, and the height of the second box plate 300 in the vertical direction can be specifically set according to the actual situation, but it is preferred that the height of the second box plate 300 in the vertical direction does not exceed the height of the frame structure 100 in the vertical direction to reduce energy waste and space waste within the graphitization furnace. Therefore, it is preferred that the height of the second box plate 300 in the vertical direction does not exceed the height of the first column 110 and the first box plate 200 in the vertical direction.

[0033] Further, the height of the second column 400 in the vertical direction can be set to be equal to the height of the second box plate 300 in the vertical direction, and it is preferred that the height of the second column 400 in the vertical direction does not exceed the height of the frame structure 100.

[0034] Refer to Figure 4 、 Figure 5 As shown, the graphitization furnace according to the second aspect embodiment of the present invention includes a furnace body 500. The furnace body 500 is provided with a furnace cavity 510. A first electrode 511 and a second electrode 512 are respectively installed at both ends in the length direction of the furnace cavity 510. The above-mentioned furnace core structure is installed in the furnace cavity 510, and both ends of the furnace core structure are electrically connected to the first electrode 511 and the second electrode 512 respectively. A heat insulation structure 520 is laid between the outer surface of the furnace core structure and the inner surface of the furnace cavity 510. The heat insulation structure 520 can select a suitable material and set a reasonable thickness according to the actual situation. Since the above-mentioned furnace core structure heats the raw materials more evenly, the temperature difference at each position in the furnace cavity 510 is smaller, the risk of furnace spraying can be reduced. While ensuring the product quality, the highest temperature in the furnace cavity 510 can also be set lower, realizing more efficient energy utilization, reducing energy waste caused by uneven heat distribution, reducing production costs and production failures caused by temperature fluctuations, and improving the reliability and continuity of the overall production.

[0035] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0036] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of the present invention.

Claims

1. A furnace core structure, characterized in that, Comprising: A frame structure, the projection of which on the horizontal plane includes a first side line and a second side line that are perpendicular to each other; A first box plate, installed on the outer peripheral wall of the frame structure to form a raw material cavity in the middle of the frame structure; the projection of the first box plate on the horizontal plane coincides with the first side line or the second side line; A second box plate, installed in the raw material cavity, the projection of the second box plate on the horizontal plane is configured as a second line segment, and the included angle between the second line segment and the first side line is an acute angle, or the included angle between the second line segment and the second side line is an acute angle; Wherein, the frame structure, the first box plate, and the second box plate are all conductors.

2. The core structure according to claim 1, characterized in that: The frame structure includes a first upright column, and the projection of the first upright column on the horizontal plane coincides with the first side line or the second side line; The conductivity of the first upright column is less than or equal to the conductivity of the second box plate.

3. The core structure according to claim 2, wherein: The furnace core structure further includes a second upright column, the second upright column is located in the raw material cavity, and the second box plate is connected to the second upright column; The conductivity of the second upright column is greater than or equal to the conductivity of the first upright column.

4. The core structure according to claim 1, characterized in that: The conductivity of the first box plate is less than or equal to the conductivity of the second box plate, and / or, the thickness of the first box plate is less than or equal to the thickness of the second box plate.

5. The core structure according to claim 1, wherein: The second box plate includes a central area and an edge area, and the edge area surrounds the outer periphery of the central area; the thickness of the central area is greater than the thickness of the edge area.

6. The core structure according to claim 1, characterized in that: The height of the second box plate in the vertical direction is less than or equal to the height of the first box plate in the vertical direction.

7. The core structure according to claim 1, characterized in that: A plurality of the second box plates are installed in the raw material cavity to divide the raw material cavity into a plurality of filling spaces; The projections of the plurality of second box plates on the horizontal plane are parallel or intersecting.

8. The core structure according to claim 1, characterized in that: The furnace core structure further includes a third box plate and a fourth box plate, the third box plate is installed at the top of the frame structure, and the fourth box plate is installed at the bottom of the frame structure.

9. A graphitization furnace, characterized in that, Comprising: A furnace body, the furnace body is provided with a furnace cavity, and a first electrode and a second electrode are respectively installed at both ends in the length direction of the furnace cavity; The furnace core structure according to any one of claims 1 to 8 is installed in the furnace cavity, and both ends of the furnace core structure are electrically connected to the first electrode and the second electrode respectively.

10. The graphitization furnace according to claim 9, characterized in that: A heat insulation structure is laid between the outer surface of the furnace core structure and the inner surface of the furnace cavity.

Images