Hollow graphitization furnace column

Abstract

The utility model discloses a hollow graphitization furnace column which comprises a furnace column body, the furnace column body is in a vertically arranged rectangular column shape, the left side and the right side of the furnace column body are both provided with installation protrusions, and the furnace column body is connected with a furnace wall in a clamped mode through the installation protrusions. A hollow channel with an opening in the bottom end is formed in the furnace column body, a plurality of communicating air holes are formed in the left side and the right side of the hollow channel, one end of each communicating air hole communicates with the hollow channel, and the other end of each communicating air hole penetrates through the outer side end face of the mounting protrusion and then communicates with an airflow through hole preset in the side wall of the furnace wall; the front side and the rear side of the hollow channel are each provided with an air inlet and an air outlet, and the air inlets are located below the air outlets. A plurality of negative pressure airflow holes are formed in the end wall of one end, close to the interior of the graphitization furnace body, of the furnace column body, are positioned between the air inlet and the air outlet and are communicated with the hollow channel.

Description

Technical Field

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

[0002] Graphitization furnaces are mainly used for the high-temperature graphitization treatment of electrodes and anode materials of lithium batteries. Its prototype is a long furnace body built of refractory materials, in which carbon billets or granular materials are loaded to form a conductive furnace core. Conductive electrode rods are arranged on the furnace walls at both ends of the furnace core and connected to a power source to form a powered circuit. When the circuit is connected, the furnace core heats up due to the resistance, causing the carbon billets to be transformed into artificial graphite through high-temperature heat treatment at a temperature of 2800 - 3200°C. The temperature inside the graphitization furnace is generally 2200 - 3200°C. A large amount of flue gas is volatilized during the early stage of graphitization of the graphitization material. Due to the pressing effect of the insulating material, the high-temperature flue gas generated by the graphitization material in the middle is not easily discharged. When it accumulates to a certain extent, an air explosion phenomenon will occur, affecting the normal production of the graphitization furnace and posing certain safety hazards. Therefore, it is necessary to improve it.

[0003] Patent No. ZL99241292.7 discloses a longitudinal DC graphitization furnace, which constitutes the furnace body of the graphitization furnace through the combination of structures such as furnace columns and furnace walls. However, in this solution, the furnace column only serves to support the furnace wall and there is no structural design for discharging flue gas, and it is impossible to achieve the effect of discharging the high-temperature flue gas inside the graphitization furnace. Therefore, this solution proposes a hollow graphitization furnace column to improve the existing furnace body structure of the graphitization furnace to solve the problem that the high-temperature flue gas inside the furnace is not easily discharged. Summary of the Invention

[0004] The purpose of the utility model is to provide a hollow graphitization furnace column with a simple structure and improved flue gas discharge effect inside the graphitization furnace for the above problems.

[0005] To achieve the above purpose, the technical solution of the utility model is:

[0006] A hollow graphitization furnace column includes a column body. The column body is in the shape of a vertically arranged rectangular column. Installation protrusions are provided on both the left and right sides of the column body and are snap-connected to the furnace wall through the installation protrusions. A hollow channel with an open bottom is arranged inside the column body. A number of communication air holes are provided on both the left and right sides of the hollow channel. One end of the communication air hole is connected to the hollow channel, and the other end of the communication air hole penetrates the outer end face of the installation protrusion and is connected to an air flow hole preset on the side wall of the furnace wall. Air inlets and air outlets are provided on both the front and back sides of the hollow channel, and the air inlets and air outlets penetrate the front and back end walls of the column body. The air inlets are located below the air outlets. The height of the air inlets is lower than the height of the bottom plate of the graphitization furnace. The air outlets are located on both the front and back sides at the top of the hollow channel. A number of negative pressure air flow holes are provided on the end wall of the column body near the inside of the graphitization furnace body. The number of negative pressure air flow holes are all located between the air inlets and the air outlets and are all connected to the hollow channel.

[0007] Further, the height of the installation protrusion is consistent with the height of the column body of the furnace column, and the width of the installation protrusion gradually narrows from the end close to the column body to the end away from the column body of the furnace column.

[0008] Further, the number of communication air holes are arranged in sequence along the height direction of the column body of the furnace column. The number of communication air holes are all located between the air inlets and the air outlets and are correspondingly arranged with the air flow holes snap-connected to both the left and right sides of the column body of the furnace column.

[0009] Further, the bottom end wall of the air inlet is arranged in an inclined shape that gradually rises from the outside to the inside; the diameter of the air inlet is larger than the diameter of the air outlet.

[0010] Further, the number of negative pressure air flow holes are arranged at equal intervals along the height direction of the column body of the furnace column. The negative pressure air flow holes are arranged in an inclined shape, and the height of the end of the negative pressure air flow hole close to the hollow channel is higher than the height of the end of the negative pressure air flow hole away from the hollow channel.

[0011] Further, the hollow channel is arranged in a cylindrical shape. An exhaust hole is provided at the top of the hollow channel. The bottom end of the exhaust hole is connected to the top of the hollow channel, and the top end of the exhaust hole penetrates the top end wall of the column body of the furnace column.

[0012] Further, a track groove is provided at the top of the column body of the furnace column. The two ends in the length direction of the track groove penetrate the side walls at the top of the installation protrusions on both the left and right sides of the column body of the furnace column. The width of the track groove gradually narrows from top to bottom; the top end of the exhaust hole penetrates the inner bottom end wall of the track groove.

[0013] Compared with the prior art, the advantages and positive effects of the present utility model are:

[0014] The utility model adopts the design of arranging a hollow channel in the furnace column body and arranging air outlets and air inlets at the upper and lower ends of the hollow channel. When the graphitization furnace is working, the external wind enters the hollow channel through the air inlet and is discharged from the air outlet at the top of the hollow channel, which generates negative pressure in the hollow channel. Under the action of this negative pressure, the negative pressure air flow holes communicated with the hollow channel can draw the high-pressure flue gas inside the graphitization furnace into the hollow channel and discharge it from the air outlet at the top, realizing the discharge effect of the high-temperature flue gas inside the graphitization furnace;

[0015] On the other hand, the utility model adopts the design of arranging communication air holes on the left and right sides of the hollow channel, which can connect the hollow channel in the furnace column body with the exhaust channel in the adjacent furnace wall, making the exhaust structures of the entire graphitization furnace wall communicate with each other. The high-temperature flue gas inside the graphitization furnace is discharged through the interconnected exhaust structures, effectively improving the fluidity of the exhaust air flow, thereby increasing the discharge rate of the flue gas inside the graphitization furnace and further improving the use effect of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a top view structure diagram of the graphitization furnace body;

[0018] Figure 2 It is a top view of the connection structure between the furnace column and the furnace wall;

[0019] Figure 3 It is a top view structure diagram of the furnace column;

[0020] Figure 4 For Figure 3 the A-A cross-sectional structure diagram;

[0021] Figure 5 For Figure 3 the B-B cross-sectional structure diagram;

[0022] Figure 6 For Figure 5 the partial structure enlarged diagram. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present utility model.

[0024] As Figure 1 shown, this embodiment discloses a graphite furnace body structure, which is composed of a furnace column body 1, a furnace wall 2, a base 3, a bottom plate 4, and a furnace head 5. The furnace column body 1 is placed on the ground. The furnace wall 2 is intermittently arranged with the furnace column body 1 and the furnace wall 2 is clamped on both sides of the furnace column body 1 to form a graphite furnace wall. The bottom end of the furnace wall 2 is supported by a plurality of horizontally arranged bases 3; a bottom plate 4 is arranged between two symmetrically arranged graphite furnace walls, and the bottom plate 4 is also supported by the base 3. Furnace heads 5 are arranged at both ends of the bottom plate 4; in the existing structure, an exhaust passage 201 is arranged inside the furnace wall 2 along the height direction, and a converging through hole is arranged between the exhaust passage 201 and the end face of the furnace wall 2 close to the inside of the furnace body to achieve the effect of discharging high-temperature flue gas inside the furnace body; however, a high-temperature flue gas discharge structure is not designed in the existing furnace column structure; based on this, the present utility model proposes a furnace column with a high-temperature flue gas discharge structure.

[0025] As Figures 2 to 6 shown, this embodiment discloses a hollow graphite furnace column, including a furnace column body 1. The furnace column body 1 is in the shape of a vertically arranged rectangular column. Installation protrusions 101 are arranged on both the left and right sides of the furnace column body 1 and are clamped and connected to installation grooves 203 arranged on both the left and right sides of the furnace wall 2 through the installation protrusions 101 to achieve the stable support effect of the furnace column body 1 on the furnace wall 2; the height of the installation protrusion 101 is consistent with the height of the furnace column body 1, and the width of the installation protrusion 101 gradually narrows from the end close to the furnace column main body 1 to the end far from the furnace column body 1 to facilitate embedding into the installation grooves 203 on both sides of the furnace wall 2.

[0026] A cylindrical hollow channel 102 with an open bottom end is arranged inside the furnace column body 1. Air inlets 103 and air outlets 104 are arranged on the front and rear sides of the hollow channel 102. The air inlets 103 and air outlets 104 on the front side of the hollow channel 102 penetrate the front end wall of the furnace column body 1, and the air inlets 103 and air outlets 104 on the rear side of the hollow channel 102 penetrate the rear end wall of the furnace column body 1; the air inlet 103 is located below the air outlet 104, and the height of the air inlet 103 is lower than the height of the graphite furnace bottom plate 4 to facilitate the entry of external air into the hollow channel 102; the air outlets 104 are located on the front and rear sides at the top of the hollow channel 102; the diameter of the air inlet 103 is larger than the diameter of the air outlet 104;

[0027] The bottom end wall of the air inlet 103 is inclined upward gradually from outside to inside; this design can make the outside air flow upward under the guiding effect of the inclined bottom end wall of the air inlet when entering the air inlet, improving the flow rate of the air flow in the hollow channel and increasing the negative pressure effect inside it.

[0028] Two communication air holes 105 are symmetrically arranged on both the left and right sides of the hollow channel 102. The two communication air holes 105 are arranged in sequence along the height direction of the furnace column body 1. Both of the two communication air holes 105 are located between the air inlet 103 and the air outlet 104. One end of the communication air hole 105 is connected to the hollow channel 102, and the other end of the communication air hole 105 penetrates the outer end face of the installation protrusion 101 and is connected to the air flow hole 202 preset on the side wall of the furnace wall 2. The air flow hole 202 on the side wall of the furnace wall 2 is located in the installation groove 203 on both sides of the furnace wall 2, and the air flow hole 202 is connected to the exhaust channel 201 preset on the furnace wall 2; in this structure, the exhaust channel 201 is an opening structure on the top side wall of the furnace wall 2.

[0029] The matching structure of the communication air hole and the air flow hole makes the internal part of the entire graphitization furnace wall form a mutually penetrating high-temperature flue gas discharge structure, with better gas fluidity and better flue gas discharge effect.

[0030] Two negative pressure air flow holes 106 are arranged on the end wall of the furnace column body 1 near the inside of the graphitization furnace body. The two negative pressure air flow holes 106 are arranged at equal intervals along the height direction of the furnace column body 1. Both of the two negative pressure air flow holes 106 are located between the air inlet 103 and the air outlet 104. Both of the two negative pressure air flow holes 106 are connected to the hollow channel 102; the negative pressure air flow holes 106 are inclined, and the height of the end of the negative pressure air flow hole 106 close to the hollow channel 102 is higher than the height of the end of the negative pressure air flow hole 106 far from the hollow channel 102.

[0031] The inclined design of the negative pressure air flow hole can make it more quickly discharge the high-temperature flue gas under the negative pressure. At the same time, after the high-temperature flue gas enters the hollow channel from the negative pressure air flow hole, it can accelerate the gas flow rate in the hollow channel, further improving the negative pressure effect in the hollow channel and the high-temperature flue gas discharge rate of the furnace column structure.

[0032] A track groove 108 is arranged at the top of the furnace column body 1. The two ends in the length direction of the track groove 108 penetrate the top side walls of the installation protrusions 101 on the left and right sides of the furnace column body 1. The width of the track groove 108 gradually narrows from top to bottom to facilitate the installation of the top cover; an exhaust hole 107 is arranged at the top of the hollow channel 102. The bottom end of the exhaust hole 107 is connected to the top end of the hollow channel 102, and the top end of the exhaust hole 107 penetrates the inner bottom end wall of the track groove 108.

[0033] The design of the exhaust holes can accelerate the outflow rate of the high-temperature flue gas in the hollow channel; at the same time, the track groove at the top of the furnace column can be used for the walking and material transportation operation of the track trolley, further improving the use effect of the present utility model.

[0034] By adopting the design of arranging a hollow channel in the furnace column body and arranging air outlets and air inlets at the upper and lower ends of the hollow channel, when the graphitization furnace is working, the external wind enters the hollow channel through the air inlet and discharges from the air outlet at the top of the hollow channel, which generates negative pressure in the hollow channel. Under the action of this negative pressure, the negative pressure air flow holes communicated with the hollow channel can draw the high-pressure flue gas inside the graphitization furnace into the hollow channel and discharge it from the air outlet at the top, realizing the discharge effect of the high-temperature flue gas inside the graphitization furnace.

[0035] On the other hand, through the design of arranging communication air holes on the left and right sides of the hollow channel, the hollow channel in the furnace column body can be communicated with the exhaust channels in the adjacent furnace walls, making the exhaust structures of the entire graphitization furnace wall penetrate each other. The high-temperature flue gas inside the graphitization furnace is discharged through the mutually penetrating exhaust structures, effectively improving the fluidity of the exhaust air flow, thereby increasing the discharge rate of the flue gas inside the graphitization furnace and further improving the use effect of the present utility model.

Claims

1. A hollow graphitization furnace column, comprising a column body, the column body being in a vertically arranged rectangular column shape, characterized in that: The left and right sides of the furnace column body are provided with mounting protrusions and are connected with the furnace wall by snap-fitting the mounting protrusions; a hollow channel with an opening at the bottom end is provided in the furnace column body, and a plurality of connecting air holes are provided on the left and right sides of the hollow channel, one end of the connecting air hole is connected with the hollow channel, and the other end of the connecting air hole passes through the outer end face of the mounting protrusion and is connected with the air flow hole preset on the side wall of the furnace wall; air inlets and air outlets are provided on the front and back sides of the hollow channel, and the air inlets and air outlets pass through the front and back end walls of the furnace column body, the air inlet is located below the air outlet, the height of the air inlet is lower than the height of the bottom plate of the graphitization furnace, and the air outlet is located on the front and back sides of the top of the hollow channel; a plurality of negative pressure air flow holes are provided on the end wall of the furnace column body close to the inside of the graphitization furnace body, and the plurality of negative pressure air flow holes are all located between the air inlet and the air outlet, and the plurality of negative pressure air flow holes are all connected with the hollow channel.

2. The hollow graphitization furnace column according to claim 1, characterized in that: The height of the installation protrusion is consistent with the height of the furnace column body, and the width of the installation protrusion gradually narrows from one end close to the furnace column body to one end away from the furnace column body.

3. The hollow graphitization furnace column according to claim 2, characterized in that: The plurality of communicating air holes are arranged in sequence along the height direction of the furnace column body, the plurality of communicating air holes are all located between the air inlet and the air outlet, and the plurality of communicating air holes are arranged corresponding to the air flow holes snap-fitted and connected to the left and right sides of the furnace column body.

4. The hollow graphitization furnace column according to claim 3, characterized in that: The bottom end wall of the air inlet is arranged in an inclined shape gradually upward from the outside to the inside; the diameter of the air inlet is larger than the diameter of the air outlet.

5. The hollow graphitization furnace column according to claim 4, characterized in that: The plurality of negative pressure airflow holes are arranged at equal intervals along the height direction of the furnace column body, the negative pressure airflow holes are arranged in an inclined shape, and the height of the end of the negative pressure airflow hole close to the hollow channel is higher than the height of the end of the negative pressure airflow hole away from the hollow channel.

6. The hollow graphitization furnace column according to claim 5, characterized in that: The hollow channel is arranged in a cylindrical shape, an exhaust hole is arranged at the top of the hollow channel, the bottom end of the exhaust hole is connected with the top end of the hollow channel, and the top end of the exhaust hole penetrates the top end wall of the furnace column body.

7. The hollow graphitization furnace column according to claim 6, characterized in that: A track groove is arranged at the top of the furnace column body, and both ends of the track groove in the length direction penetrate the top side walls of the mounting protrusions on the left and right sides of the furnace column body, and the width of the track groove gradually narrows from top to bottom; the top of the exhaust hole penetrates the inner bottom end wall of the track groove.

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