Furnace pressure discharge structure of graphitization furnace

Abstract

The utility model discloses a furnace pressure discharge structure of a graphitization furnace. The furnace pressure discharge structure comprises a graphitization furnace body, a working box body is arranged in the graphitization furnace body, the working box body is in a rectangular column box body shape and is formed by splicing a plurality of graphite plates, and heat preservation materials are filled between the end face of the bottom end of the working box body and the end face of the bottom end in the graphitization furnace body and between the outer side wall of the periphery of the working box body and the inner side wall of the graphitization furnace body; a plurality of ventilation blocks are placed at the splicing gap position of the top end of the working box body, and heat preservation materials are filled between the peripheries of the ventilation blocks and the inner wall of the graphitization furnace body and between the peripheries of the ventilation blocks and the top end face of the working box body; the top end face of the breathable block is not lower than the top end face of the filled heat preservation material. According to the utility model, most volatile gas in the working box body can overflow from the ventilation block at the top end of the working box body, so that the gas pressure in the working box body is effectively reduced, and the safe production of the graphitization furnace is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the field of graphitization furnaces, in particular to a furnace pressure discharge structure of a graphitization furnace. Background Art

[0002] Graphitization furnaces are mainly used for high-temperature graphitization treatment operations of electrodes and battery negative electrode materials; Patent No. ZL201922328489.6 discloses a new type of high-purity graphite high-temperature graphitization furnace, which can realize the graphitization treatment operation of carbon blanks; however, the internal temperature of the graphitization furnace generally needs to be maintained at 2200~3200℃. Before 1000℃, if the volatile matter of the graphitized material cannot overflow smoothly and accumulates in the furnace, the pressure in the furnace will increase. After the furnace temperature continues to rise, it will be forcibly ejected, resulting in a serious production accident of the spraying furnace. Summary of the invention

[0003] The utility model aims to solve the above problems and provide a graphitization furnace pressure discharge structure which has a simple structure and improves the heat dissipation effect.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A furnace pressure discharge structure of a graphitization furnace comprises a graphitization furnace body; a working box is arranged inside the graphitization furnace body, the working box is in the shape of a rectangular column box and is assembled from a plurality of graphite plates, and insulation material is filled between the bottom end face of the working box body and the bottom end face inside the graphitization furnace body, and between the outer walls around the working box body and the inner walls of the graphitization furnace body; a plurality of air permeable blocks are placed at the top assembly joint of the working box body, and insulation material is filled between the outer periphery of the air permeable blocks and the inner wall of the graphitization furnace body and the top end face of the working box body; the top end face of the air permeable blocks is not lower than the top end face of the filled insulation material.

[0006] Furthermore, the graphitization furnace body includes a bottom plate, a retaining wall, and a furnace head; the bottom plate is in the shape of a rectangular plate and is placed on the furnace bottom pier, there are two retaining walls and the two retaining walls are symmetrically arranged on both sides of the bottom plate in the width direction, there are two furnace heads and the two furnace heads are symmetrically arranged on both sides of the bottom plate in the length direction, and the bottom plate, the two retaining walls, and the two furnace heads together form a rectangular column cavity structure with an open top.

[0007] Furthermore, the working box body includes a bottom box plate, a top box plate, a side wall box plate, a head box plate, and a middle box plate; the bottom box plate, the top box plate, the side wall box plate, the head box plate, and the middle box plate are all in the shape of rectangular plates, the bottom box plate is horizontally arranged and the length direction of the bottom box plate is consistent with the length direction of the graphitization furnace body, there are two side wall box plates and the two side wall box plates are symmetrically arranged vertically on both sides of the width direction of the bottom box plate; there are two head box plates and the two head box plates are symmetrically arranged vertically on both sides of the length direction of the bottom box plate; the top box plate is horizontally arranged and the top box plate is arranged on the top of the two side wall box plates and the two head box plates to form a rectangular columnar sealed box body inside the working box body; the middle box plate is arranged parallel to the side wall box plates and the middle box plate is arranged between the two side wall box plates, and the middle box plate is respectively in contact with the top box plate, the bottom box plate and the two head box plates on all sides to divide the inside of the sealed box body into two completely consistent and relatively independent working cavities.

[0008] Furthermore, a heating rod is arranged in the working cavity, the heating rod is arranged at the center of the working cavity, the length direction of the heating rod is consistent with the length direction of the working box, and the lithium battery negative electrode material is filled between the outer periphery of the heating rod and the inner wall of the working cavity.

[0009] Furthermore, the air permeable block is cylindrical and placed vertically in the gap between the plates at the top of the top box plate; there are a plurality of air permeable blocks, which are arranged in two rows and the two rows of air permeable blocks are arranged at equal intervals in the gap along the length direction of the working box body.

[0010] Furthermore, the top end surface of the air permeable block is flush with the top end surface of the thermal insulation material.

[0011] Furthermore, the air permeable block is a porous silicon carbide ceramic air permeable block.

[0012] Compared with the prior art, the utility model has the following advantages and positive effects:

[0013] The utility model adopts a design in which a working box is arranged in the furnace body of the graphitization furnace and a breathable block is arranged on the top of the working box, so that when the graphitization furnace is performing production operations, the heating rod in the working box is used to perform high-temperature heating operation on the negative electrode material of the lithium battery, and the thermal insulation material on the periphery of the working box can prevent the temperature in the working box from dissipating too quickly and prevent the oxidation of the box plate and the processed materials, thereby ensuring that the high-temperature production environment inside the working box is not affected; at the same time, when the gas pressure in the working box is too high, due to the high-density pores in the breathable block, most of the volatile gases in the working box will overflow from the breathable block on the top of the working box, effectively reducing the gas pressure in the working box, avoiding the occurrence of furnace spraying accidents caused by excessive pressure inside the working box, effectively ensuring the safe production of the graphitization furnace, and further improving the use effect of the graphitization furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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 labor.

[0015] Figure 1 It is a schematic diagram of the top view structure of the utility model;

[0016] Figure 2 for Figure 1 AA cross-sectional structure diagram;

[0017] Figure 3 This is a top view of the installation effect of the breathable block. DETAILED DESCRIPTION

[0018] 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 of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the utility model.

[0019] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment discloses a furnace pressure discharge structure of a graphitization furnace, including a furnace body of the graphitization furnace;

[0020] The graphitization furnace body includes a bottom plate 1, a retaining wall 2, and a furnace head 3; the bottom plate 1 is in the shape of a rectangular plate and is horizontally placed on the furnace bottom pier, there are two retaining walls 2 and the two retaining walls 2 are symmetrically arranged on both sides of the bottom plate 1 in the width direction, there are two furnace heads 3 and the two furnace heads 3 are symmetrically arranged on both sides of the bottom plate 1 in the length direction, and the bottom plate 1, the two retaining walls 2, and the two furnace heads 3 together form a rectangular column cavity structure with an opening at the top.

[0021] The graphitization furnace body is composed of a bottom plate, a retaining wall and a furnace head. Each component is heavy and is usually placed directly on the furnace bottom pier for splicing and assembly.

[0022] The graphitization furnace is provided with a working box 4 in the shape of a rectangular column box;

[0023] The working box body 4 includes a bottom box plate 401, a top box plate 404, a side wall box plate 402, a head box plate, and a middle box plate 403; the bottom box plate 401, the top box plate 404, the side wall box plate 402, the head box plate, and the middle box plate 403 are all rectangular plates, the bottom box plate 401 is horizontally arranged and the length direction of the bottom box plate 401 is consistent with the length direction of the graphitization furnace body, there are two side wall box plates 402 and the two side wall box plates 402 are symmetrically arranged vertically on both sides of the width direction of the bottom box plate 401; there are two head box plates and the two head box plates are symmetrically arranged vertically On both sides of the bottom box plate 401 in the length direction; the top box plate 404 is horizontally arranged and the top box plate 404 is arranged on the top of the two side wall box plates 402 and the two head box plates to form a rectangular columnar sealed box inside the working box body 4; the middle box plate 403 is parallel to the side wall box plate 402 and the middle box plate 403 is arranged between the two side wall box plates 402, and the middle box plate 403 is respectively in contact with the top box plate 404, the bottom box plate 404 and the two head box plates to divide the inside of the sealed box body into two completely identical and relatively independent working cavities.

[0024] A heating rod 8 is arranged in the working cavity. The heating rod 8 is arranged at the center of the working cavity. The length direction of the heating rod 8 is consistent with the length direction of the working box 4. The lithium battery negative electrode material 7 is filled between the outer periphery of the heating rod 8 and the inner wall of the working cavity.

[0025] When building the working environment of the entire graphitization furnace, first assemble the furnace body of the graphitization furnace, then lay a part of the insulation material in the furnace body of the graphitization furnace, place the bottom box plate on the top of the laid insulation material, then arrange the side wall box plate, the head box plate, and the middle box plate at the edge of the bottom box plate, then set the heating rod in the working chamber and fill it with lithium battery negative electrode material, finally cover the top box plate on the top of the side wall box plate, the head box plate, and the middle box plate, place the air permeable block, and continue to fill the insulation material in the furnace body of the graphitization furnace until the insulation material is flush with the top of the air permeable block, then energize the heating rod and carry out production operations;

[0026] In order to improve the structural stability of the working box body, support frames are usually installed between the side wall box plate, the head box plate and the inner wall of the graphitization furnace body, and between the side wall box body and the middle box plate, so that the side wall box plate, the head box plate and the middle box plate can be stably placed vertically in the graphitization furnace body, thereby improving the structural strength of the working box body; at the same time, the connection structure is quick to assemble and easy to operate, further improving the use effect of the graphitization furnace.

[0027] The bottom end surface of the bottom box plate 401 and the bottom plate 1, as well as the side wall box plate 402, the outer wall of the head box plate and the inner wall of the baffle wall 2 and the inner wall of the furnace head 3 are filled with insulation material 6 for preventing rapid heat loss; a plurality of air-permeable blocks 5 are placed at the top of the assembly gap position of the top box plate 404; the air-permeable blocks 5 are porous silicon carbide ceramic air-permeable blocks; the plurality of air-permeable blocks 5 are arranged in two rows, and each row of air-permeable blocks 5 are arranged at equal intervals along the length direction of the gap position of the top box plate 404; the air-permeable blocks 5 are cylindrical and placed vertically; the outer periphery of the air-permeable blocks 5 and the inner wall of the baffle wall 2, the inner wall of the furnace head 3 and the top end surface of the top box plate 404 are filled with insulation material 6; the top end surface of the air-permeable block 5 is flush with the top end surface of the filled insulation material 6, so as to avoid the insulation material 6 blocking the air-permeable block 5 and affecting the gas overflow effect of the air-permeable block 5.

[0028] After production, the air permeable block, thermal insulation material, top box plate of the working box, etc. can be disassembled and taken out, and can be reassembled and reused during the next production operation. This can realize the repeated production and utilization of the graphitization furnace, reduce the production loss of the graphitization furnace, and improve the economic value of the graphitization furnace.

[0029] The utility model adopts a design in which a working box is arranged in the furnace body of the graphitization furnace and a breathable block is arranged on the top of the working box, so that when the graphitization furnace is performing production operations, the heating rod in the working box is used to perform high-temperature heating operation on the negative electrode material of the lithium battery, and the thermal insulation material on the periphery of the working box can prevent the temperature in the working box from dissipating too quickly and prevent the oxidation of the box plate and the processed materials, thereby ensuring that the high-temperature production environment inside the working box is not affected; at the same time, when the gas pressure in the working box is too high, due to the high-density pores in the breathable block, most of the volatile gases in the working box will overflow from the breathable block on the top of the working box, effectively reducing the gas pressure in the working box, avoiding the occurrence of furnace spraying accidents caused by excessive pressure inside the working box, effectively ensuring the safe production of the graphitization furnace, and further improving the use effect of the graphitization furnace.

Claims

1. A graphitization furnace pressure discharge structure, comprising a graphitization furnace body; characterized in that: A working box is arranged in the graphitization furnace body. The working box is in the shape of a rectangular column and is assembled from a number of graphite plates. Insulation material is filled between the bottom end face of the working box and the bottom end face inside the graphitization furnace body, and between the outer walls around the working box and the inner walls of the graphitization furnace body. Several air-permeable blocks are placed at the top assembly joint of the working box body. Insulation material is filled between the outer periphery of the air-permeable blocks and the inner walls of the graphitization furnace body and the top end face of the working box body. The top end face of the air-permeable blocks is not lower than the top end face of the filled insulation material.

2. The graphitization furnace pressure discharge structure according to claim 1, characterized in that: The graphitization furnace body includes a bottom plate, a retaining wall, and a furnace head; the bottom plate is in the shape of a rectangular plate and is placed on the furnace bottom pier, there are two retaining walls and the two retaining walls are symmetrically arranged on both sides of the bottom plate in the width direction, there are two furnace heads and the two furnace heads are symmetrically arranged on both sides of the bottom plate in the length direction, and the bottom plate, the two retaining walls, and the two furnace heads together form a rectangular column cavity structure with an opening at the top.

3. The graphitization furnace pressure discharge structure according to claim 1, characterized in that: The working box body includes a bottom box plate, a top box plate, a side wall box plate, a head box plate, and a middle box plate; the bottom box plate, the top box plate, the side wall box plate, the head box plate, and the middle box plate are all rectangular plate-shaped, the bottom box plate is horizontally arranged and the length direction of the bottom box plate is consistent with the length direction of the graphitization furnace body, there are two side wall box plates, and the two side wall box plates are symmetrically vertically arranged on both sides of the width direction of the bottom box plate; there are two head box plates, and the two head box plates are symmetrically vertically arranged on both sides of the length direction of the bottom box plate; the top box plate is horizontally arranged and the top box plate is arranged on the top of the two side wall box plates and the two head box plates to form a rectangular columnar sealed box body inside the working box body; the middle box plate is arranged parallel to the side wall box plates and the middle box plate is arranged between the two side wall box plates, and the middle box plate is respectively in contact with the top box plate, the bottom box plate and the two head box plates on all sides to divide the inside of the sealed box body into two completely consistent and relatively independent working cavities.

4. The graphitization furnace pressure discharge structure according to claim 3, characterized in that: A heating rod is arranged in the working cavity, the heating rod is arranged at the center of the working cavity, the length direction of the heating rod is consistent with the length direction of the working box, and the lithium battery negative electrode material is filled between the outer periphery of the heating rod and the inner wall of the working cavity.

5. The graphitization furnace pressure discharge structure according to claim 1, characterized in that: The air permeable block is cylindrical and vertically placed in the inter-plate gap at the top of the top box plate; there are a plurality of air permeable blocks, which are arranged in two rows and the two rows of air permeable blocks are arranged at equal intervals along the length direction of the working box body.

6. The graphitization furnace pressure discharge structure according to claim 1, characterized in that: The top end surface of the air permeable block is flush with the top end surface of the thermal insulation material.

7. The graphitization furnace pressure discharge structure according to claim 1, characterized in that: The air permeable block is a porous silicon carbide ceramic air permeable block.

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