Graphitization furnace and heat treatment system

Abstract

The application relates to a graphitization furnace and a heat treatment system, the graphitization furnace comprising: a furnace body having a reaction cavity; first and second electrodes with opposite polarities, at least one of the first and second electrodes having a first end inserted into the reaction cavity and a second end located outside the reaction cavity, a mounting groove being formed on the end face of the second end; and a cooling piece arranged in the mounting groove and having a cooling cavity inside. The cooling medium in the application circulates in the cooling cavity and does not directly contact the first and / or second electrode, that is, the cooling piece can play a role of isolation between the first and / or second electrode and the cooling medium, on the basis of realizing cooling, the probability of the cooling medium penetrating into the reaction cavity through the first and / or second electrode is reduced, and the operation process of the graphitization furnace is more stable.

Description

Technical Field

[0001] This application relates to the field of graphitization furnace technology, and in particular to a graphitization furnace and heat treatment system. Background Technology

[0002] The carbon atoms in carbonaceous materials are arranged irregularly. Only through high-temperature heat treatment, causing the carbon atoms to recrystallize and rearrange in an ordered manner, can the crystalline structure of graphite be presented. This results in graphite possessing many of its excellent properties, such as significantly improved electrical and thermal conductivity, better chemical and thermal stability, reduced impurities, lower hardness, and easier machining. The function of a graphitization furnace is to transform carbonaceous materials into artificial graphite materials, enabling their better application in industrial manufacturing.

[0003] When a graphitization furnace is in use, one end of the electrode is inserted into the furnace body, while the other end may be located outside the furnace body. The temperature inside the furnace body is high, which causes the temperature of the electrode located inside the furnace body to rise. Due to the heat transfer of the electrode itself, the temperature of the electrode located outside the furnace body also rises, making it prone to oxidation in the air.

[0004] Therefore, the electrodes need to be cooled. However, when current cooling devices cool the electrodes, the cooling medium inside the device can easily affect the operation of the graphitization furnace. Utility Model Content

[0005] Therefore, it is necessary to provide a graphitization furnace and heat treatment system to address the problem that the cooling medium inside the current cooling device can easily affect the operation of the graphitization furnace when cooling the electrodes.

[0006] In a first aspect, this application provides a graphitization furnace, including a furnace body, a first electrode and a second electrode with opposite polarities, and a cooling element; the furnace body has a reaction chamber; at least one of the first electrode and the second electrode has a first end inserted into the reaction chamber and a second end located outside the reaction chamber, and an installation groove is formed on the end face of the second end; the cooling element is disposed in the installation groove, and the cooling element has a cooling chamber inside, the cooling chamber being used to contain a cooling medium.

[0007] With the above structure, the cooling element can isolate the first electrode and / or the second electrode from the cooling medium, thereby reducing the probability of the cooling medium penetrating into the reaction chamber through the first electrode and / or the second electrode while achieving cooling and temperature reduction, making the operation of the graphitization furnace more stable.

[0008] In some embodiments, the cooling element is made of a metallic material. This structure allows the cooling element to better transfer heat to the first electrode and / or the second electrode, improving thermal conductivity and efficiency.

[0009] In some embodiments, a receiving gap is formed between the cooling element and the wall of the mounting groove, and the graphitization furnace further includes a heat-conducting layer filled in the receiving gap.

[0010] Therefore, by providing a thermally conductive layer in the accommodating gap, the contact thermal resistance between the cooling component and the first electrode and / or the second electrode can be reduced, thereby further improving the thermal conductivity and thermal efficiency.

[0011] In some embodiments, the width of the accommodating gap ranges from 2 mm to 10 mm. Setting the width of the accommodating gap within this range can effectively improve the filling density of the thermally conductive layer, thereby improving thermal conductivity and efficiency.

[0012] In some embodiments, the width of the accommodating gap ranges from 3 mm to 5 mm. This further improves the filling density of the thermally conductive layer, thereby enhancing its thermal conductivity and efficiency.

[0013] In some embodiments, the thermal conductivity of the heat-conducting layer is not less than 8 W / (m·K). Setting the thermal conductivity of the heat-conducting layer within the above range can effectively improve the thermal conductivity and efficiency between the heat-conducting layer and the cooling element.

[0014] In some embodiments, the thermal conductivity of the cooling element is greater than that of the thermally conductive layer. This improves the thermal conductivity of the cooling element, allowing for better cooling of the first electrode and / or the second electrode via the cooling medium within the cooling element.

[0015] In some embodiments, the cooling component is provided with an inlet pipe and an outlet pipe respectively communicating with the cooling chamber, and the outlet pipe is located above the inlet pipe along the direction of gravity.

[0016] This allows the cooling medium to fill the cooling chamber more fully and increases the residence time of the cooling medium in the cooling chamber, thereby improving thermal conductivity and thermal efficiency.

[0017] In some embodiments, a plurality of baffles are provided in the cooling chamber, and each baffle divides the cooling chamber into a plurality of interconnected sub-cavities. The sub-cavities are arranged sequentially from the side closest to the reaction chamber to the side furthest from the reaction chamber. One end of the water inlet pipe extends into the head sub-cavity close to the reaction chamber, and one end of the water outlet pipe is connected to the tail sub-cavity furthest from the reaction chamber.

[0018] The above structure can further increase the flow time of the cooling medium in the cooling chamber, effectively improving thermal conductivity and efficiency.

[0019] In some embodiments, the graphitization furnace further includes a flow-deflecting element disposed in at least one sub-cavity. Thus, by incorporating the flow-deflecting element, the thermal conductivity of the cooling medium can be further improved.

[0020] In some embodiments, a plurality of partitions are provided in the cooling chamber, each partition dividing the cooling chamber into a plurality of interconnected sub-cavities, each sub-cavity being arranged sequentially along the direction of gravity; wherein, one end of the water inlet pipe is connected to the sub-cavity located at the bottom in the direction of gravity, and one end of the water outlet pipe is connected to the sub-cavity located at the top in the direction of gravity.

[0021] The above structure can further increase the flow time of the cooling medium in the cooling chamber, effectively improving thermal conductivity and efficiency.

[0022] In some embodiments, the graphitization furnace further includes a turbulence pipe disposed in the cooling chamber, the two ends of which are connected to an inlet pipe and an outlet pipe, respectively, and the turbulence pipe is arranged in a curved extension.

[0023] The above structure can effectively increase the flow time of the cooling medium in the turbulence pipe, thereby improving the thermal conductivity and efficiency of the cooling medium.

[0024] In some embodiments, the outlet pipe has a connecting section and a bent section, the connecting section communicating between the cooling chamber and the bent section, and the bent section extending upward in the direction of gravity relative to the connecting section.

[0025] With the above structure, the air in the cooling chamber can be discharged through the water outlet pipe, reducing the probability that residual air at the top of the cooling chamber will prevent the cooling medium from generating convective heat transfer with the chamber wall.

[0026] In some embodiments, an exhaust port is provided on the top surface of the cooling element along the direction of gravity, and the graphitization furnace further includes an exhaust pipe with one end connected to the exhaust port.

[0027] In this way, the gas in the cooling chamber can be better discharged through the exhaust port and exhaust pipe, allowing the cooling medium to be better filled in the cooling chamber and improving the thermal conductivity.

[0028] Secondly, this application also provides a heat treatment system, including the graphitization furnace described above.

[0029] The aforementioned graphitization furnace and heat treatment system have an installation groove at the second end of the first electrode and / or the second electrode located outside the reaction chamber. A cooling component can be placed in the installation groove, and the cooling component has a cooling chamber inside, allowing the cooling medium to circulate within the cooling chamber, thereby achieving cooling and temperature reduction of the first electrode and / or the second electrode. At the same time, the cooling medium circulates within the cooling chamber without directly contacting the first electrode and / or the second electrode. In other words, the cooling component can act as an isolation between the first electrode and / or the second electrode and the cooling medium. While achieving cooling and temperature reduction, it reduces the probability of the cooling medium penetrating into the reaction chamber through the first electrode and / or the second electrode, making the operation of the graphitization furnace more stable. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a graphitization furnace according to one or more embodiments.

[0031] Figure 2 This is a side view of a first or second electrode in a graphitization furnace according to one or more embodiments.

[0032] Figure 3 This is a schematic diagram of the structure of a cooling component in a graphitization furnace according to one or more embodiments.

[0033] Figure 4 This is a schematic diagram of the structure of a cooling component in a graphitization furnace according to one or more embodiments.

[0034] Figure 5 This is a schematic diagram of the structure of a cooling component in a graphitization furnace according to one or more embodiments.

[0035] Explanation of reference numerals in the attached drawings: 100, graphitization furnace; 10, furnace body; 20, first electrode; 30, second electrode; 40, cooling component; 50, heat-conducting layer; 60, flow-dissipating component; 70, flow-dissipating pipe; 80, exhaust pipe; 11, reaction chamber; 31, first end; 32, second end; 33, mounting groove; 41, cooling chamber; 42, water inlet pipe; 43, water outlet pipe; 44, partition plate; 45, sub-chamber; 46, connecting section; 47, bending section; a, direction of gravity. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as other fields. With the continuous expansion of the application areas of battery devices, the market demand is also constantly increasing.

[0043] Carbonaceous materials are a key component of battery structures. The carbon atoms in these materials are irregularly arranged; only through high-temperature heat treatment, causing recrystallization and a rearrangement of the carbon atoms, can they exhibit the crystalline structure of graphite, thus acquiring graphite's excellent electrical and thermal conductivity, as well as its chemical and thermal stability. Therefore, carbonaceous materials need to be converted into artificial graphite materials using a graphitization furnace, enabling their application in the production of battery anode materials.

[0044] In other words, a key step in the production process of carbon anode materials is graphitization. Graphitization refers to the transformation of carbon atoms from a random, irregular arrangement to a regularly arranged hexagonal planar network structure, i.e., graphite microcrystalline structure, at high temperatures. The purpose is to obtain graphite's high electrical and thermal conductivity, corrosion resistance, and abrasion resistance. During graphitization, the higher the temperature, the more complete the development of the graphite microcrystalline structure, thus increasing the degree of graphitization. The equipment used to complete graphitization is the graphitization furnace.

[0045] The structure of a graphitization furnace typically includes two electrodes with opposite polarities, namely a positive electrode and a negative electrode. An electric field can be formed between the positive and negative electrodes. When the material passes through the electric field, it can be heated and graphitized.

[0046] The positive and negative electrodes are usually made of graphite. The positive electrode is inserted vertically into the reaction chamber through the feed port at the top of the furnace body, while the negative electrode is inserted horizontally through the furnace body, so that one end of the negative electrode is inside the reaction chamber of the furnace body and the other end is outside the reaction chamber.

[0047] For the negative electrode, the end located inside the reaction chamber heats up due to the high temperature inside the chamber, and the temperature of the end located outside the reaction chamber also rises due to its own heat transfer. At this time, the end outside the reaction chamber is prone to oxidation in the air.

[0048] Therefore, the electrodes in a graphitization furnace require cooling during operation. Currently, the electrodes are typically cooled by directly spraying or supplying cooling water. However, graphite electrodes are porous products; when cooling water comes into contact with the graphite electrodes, it can permeate through the electrodes into the reaction chamber, affecting the operation of the graphitization furnace.

[0049] Based on the above considerations, to address the problem that the cooling medium inside the current cooling device can easily affect the operation of the graphitization furnace when cooling the electrodes, one or more embodiments of this application provide a graphitization furnace with an installation groove at the second end of the first electrode and / or the second electrode located outside the reaction chamber. A cooling element can be placed within the installation groove, and the cooling element has a cooling chamber inside, allowing the cooling medium to circulate within the cooling chamber, thereby achieving cooling of the first electrode and / or the second electrode. Simultaneously, the cooling medium circulates within the cooling chamber without directly contacting the first electrode and / or the second electrode. In other words, the cooling element can act as an isolation between the first electrode and / or the second electrode and the cooling medium, reducing the probability of the cooling medium seeping into the reaction chamber through the first electrode and / or the second electrode while achieving cooling, thus making the operation of the graphitization furnace more stable.

[0050] Please refer to the following: Figure 1 , Figure 2 as well as Figure 3 One embodiment of this application provides a graphitization furnace 100, including a furnace body 10, a first electrode 20, a second electrode 30, and a cooling element 40. The furnace body 10 has a reaction chamber 11. The first electrode 20 and the second electrode 30 have opposite polarities. At least one of the first electrode 20 and the second electrode 30 has a first end 31 inserted into the reaction chamber 11 and a second end 32 located outside the reaction chamber 11. A mounting groove 33 is formed on the end face of the second end 32. The cooling element 40 is disposed in the mounting groove 33, and the cooling element 40 has a cooling chamber 41 inside, which is used to contain a cooling medium.

[0051] It should be noted that the graphitization furnace 100 refers to a device capable of heating carbonaceous materials, causing the randomly arranged carbon atoms to rearrange in an orderly manner, presenting the crystalline structure of graphite. The furnace body 10 is the main part of the graphitization furnace 100. The interior of the furnace body 10 is hollow to form a reaction chamber 11, which can accommodate materials and provide reaction space for the materials.

[0052] The material entering the graphitization furnace 100 is a graphitizable carbonaceous material, such as petroleum coke, coal coke, and asphalt. After entering the graphitization furnace 100, the material undergoes four stages: preheating, calcination, graphitization, and cooling to complete the graphitization process and obtain the negative electrode material product. Volatile exhaust gas is released during the process.

[0053] The first electrode 20 and the second electrode 30 have opposite polarities; that is, one of the first electrode 20 and the second electrode 30 can be a positive electrode, and the other is a negative electrode. An electric field can be formed between the first electrode 20 and the second electrode 30. As the material passes through the electric field, current flows through the material, thus forming a current flow loop, thereby graphitizing the material.

[0054] Understandably, both the first electrode 20 and the second electrode 30 can be graphite electrodes.

[0055] A feed inlet and a discharge outlet can be provided on the furnace body 10. The feed inlet can be located on the top of the furnace body 10 and connected to the reaction chamber 11. The positive electrode can extend vertically into the reaction chamber 11 from the feed inlet, and the material can also be fed in from the feed inlet, allowing the material to fall into the reaction chamber 11 under the action of gravity.

[0056] The discharge port can be located at the bottom of the furnace body 10, so that the graphitized material can be discharged from the reaction chamber 11 through the discharge port for further cooling or other subsequent operations.

[0057] When arranging the first electrode 20 and the second electrode 30, the first electrode 20 can be inserted into the reaction chamber 11 through the feed port, and the second electrode 30 can be inserted into the reaction chamber 11 in a horizontal direction. At this time, one end of the second electrode 30 is located inside the reaction chamber 11, and the other end is located outside the reaction chamber 11.

[0058] Alternatively, the second electrode 30 can be inserted into the reaction chamber 11 through the feed inlet, and the first electrode 20 can be inserted into the reaction chamber 11 in a horizontal direction. Alternatively, both the first electrode 20 and the second electrode 30 can be inserted into the reaction chamber 11 in a horizontal direction.

[0059] For ease of understanding, the example given is that the first electrode 20 extends vertically into the reaction chamber 11 from the feed port, and the second electrode 30 is inserted horizontally into the reaction chamber 11. That is, one end of the second electrode 30 is located inside the reaction chamber 11, and the other end is located outside the reaction chamber 11.

[0060] The end located inside the reaction chamber 11 is the first end 31, and the end located outside the reaction chamber 11 is the second end 32, with an installation groove 33 formed on the end face of the second end 32.

[0061] The cooling component 40 is placed inside the mounting groove 33, that is, the cooling component 40 is completely housed inside the mounting groove 33. The interior of the cooling component 40 is hollow, forming a cooling chamber 41, and a cooling medium, such as cooling water, is introduced into the cooling chamber 41, allowing the cooling water to circulate within the cooling chamber 41 and eventually flow out of the cooling chamber 41.

[0062] In this way, during the process of the cooling medium entering and exiting the cooling chamber 41, it can exchange heat with the second electrode 30, thereby removing the heat from the second electrode 30 and cooling down the second end 32 of the second electrode 30.

[0063] Thus, through the above structure, the cooling element 40 can isolate the first electrode 20 and / or the second electrode 30 from the cooling medium, thereby reducing the probability of the cooling medium penetrating into the reaction chamber 11 through the first electrode 20 and / or the second electrode 30 while achieving cooling and temperature reduction, making the operation of the graphitization furnace 100 more stable.

[0064] In some embodiments, the cooling element 40 is made of metal.

[0065] Specifically, the cooling component 40 made of metal can better achieve heat transfer and improve thermal conductivity. The material of the cooling component 40 can be, but is not limited to, high thermal conductivity metals such as copper, stainless steel, and aluminum.

[0066] The above structure enables the cooling element 40 to better transfer heat to the first electrode 20 and / or the second electrode 30, thereby improving thermal conductivity and efficiency.

[0067] In some embodiments, a receiving gap (not shown) is formed between the cooling member 40 and the wall of the mounting groove 33, and the graphitization furnace 100 further includes a heat-conducting layer 50 filled in the receiving gap.

[0068] Specifically, the cooling element 40 and the wall of the mounting groove 33 are spaced apart to form a receiving gap. A heat-conducting layer 50 is then filled into the receiving gap, which allows for better heat transfer between the first electrode 20 and / or the second electrode 30 and the cooling medium, thereby improving thermal conductivity and efficiency.

[0069] Furthermore, the thermally conductive layer 50 can be made of a high thermal conductivity ramming material, that is, the high thermal conductivity ramming material is filled into the accommodating gap and rammed to make it densely filled, thereby improving the thermal conductivity.

[0070] Among them, high thermal conductivity ramming mixes can be made of materials such as carbon ramming mix, graphite ramming mix, iron filings filler, and graphite paper, but are not limited to these.

[0071] Therefore, by providing a thermally conductive layer 50 in the accommodating gap, the contact thermal resistance between the cooling element 40 and the first electrode 20 and / or the second electrode 30 can be reduced, thereby further improving the thermal conductivity and thermal efficiency.

[0072] In some embodiments, the width of the accommodating gap ranges from 2 mm to 10 mm.

[0073] Specifically, the width of the accommodating gap will affect the filling density of the thermally conductive layer 50, thereby affecting its thermal conductivity.

[0074] Therefore, setting the width of the accommodating gap within the above range can effectively improve the filling density of the thermally conductive layer 50, thereby improving its thermal conductivity and efficiency.

[0075] As a specific embodiment, the width of the accommodating gap can be, but is not limited to, 2mm, 4mm, 6mm, 8mm, or 10mm.

[0076] In some embodiments, the width of the accommodating gap ranges from 3 mm to 5 mm. This further improves the filling density of the thermally conductive layer 50, thereby enhancing its thermal conductivity and efficiency.

[0077] As one specific embodiment, the width of the accommodating gap can be, but is not limited to, 3mm, 4mm, or 5mm.

[0078] In some embodiments, the thermal conductivity of the thermally conductive layer 50 is not less than 8 W / (m·K).

[0079] Specifically, the thermally conductive layer 50 is filled between the first electrode 20 and / or the second electrode 30 and the cooling element 40. Therefore, the thermal conductivity of the thermally conductive layer 50 will affect its thermal conductivity performance and thermal efficiency between the first electrode 20 and / or the second electrode 30 and the cooling element 40.

[0080] Therefore, by setting the thermal conductivity of the heat-conducting layer 50 within the above-mentioned range, the thermal conductivity and thermal efficiency of the heat-conducting layer 50 between the first electrode 20 and / or the second electrode 30 and the cooling element 40 can be effectively improved.

[0081] In some embodiments, the thermal conductivity of the cooling element 40 is greater than that of the thermal conductivity of the thermally conductive layer 50.

[0082] Specifically, the thermal conductivity of the cooling element 40 will directly affect the cooling effect on the first electrode 20 and / or the second electrode 30.

[0083] Therefore, when the thermal conductivity of the cooling element 40 is greater than that of the thermal conductive layer 50, the probability of the cooling element 40 becoming a thermal resistance layer can be reduced, the thermal conductivity of the cooling element 40 can be improved, and the cooling medium inside the cooling element 40 can better cool and reduce the temperature of the first electrode 20 and / or the second electrode 30.

[0084] In some embodiments, the cooling component 40 is provided with an inlet pipe 42 and an outlet pipe 43 that are respectively connected to the cooling chamber 41, and the outlet pipe 43 is located above the inlet pipe 42 along the gravity direction a.

[0085] Specifically, the cooling medium can be introduced into the cooling chamber 41 through the inlet pipe 42, circulate and exchange heat within the cooling chamber 41, and then flow out through the outlet pipe 43. In this way, the cooling medium can circulate and exchange heat within the cooling chamber 41.

[0086] The outlet pipe 43 is positioned above the inlet pipe 42 along the direction of gravity a, meaning that the cooling medium enters the cooling chamber 41 from below. As the cooling medium is introduced, the liquid level of the cooling medium in the cooling chamber 41 gradually rises. When the liquid level of the cooling medium reaches the outlet pipe 43, the cooling medium can be discharged from the outlet pipe 43.

[0087] This allows the cooling medium to be filled into the cooling chamber 41 more fully and increases the residence time of the cooling medium in the cooling chamber 41, thereby improving the thermal conductivity and thermal efficiency.

[0088] like Figure 3 As shown, in some embodiments, a plurality of partitions 44 are provided in the cooling chamber 41, and each partition 44 divides the cooling chamber 41 into a plurality of interconnected sub-cavities 45. The sub-cavities 45 are arranged sequentially from the side closest to the reaction chamber 11 to the side furthest from the reaction chamber 11. One end of the water inlet pipe 42 extends into the head sub-cavity 45 closest to the reaction chamber 11, and one end of the water outlet pipe 43 is connected to the tail sub-cavity 45 furthest from the reaction chamber 11.

[0089] Specifically, each partition 44 is arranged vertically, that is, each partition 44 is perpendicular to the horizontal direction. The partitions 44 are arranged at intervals in the cooling cavity 41 in the horizontal direction, thereby dividing the cooling cavity 41 into multiple sub-cavities 45 arranged in the horizontal direction.

[0090] Furthermore, each partition 44 may have an outlet, through which the cooling medium can flow between the sub-cavities 45.

[0091] Understandably, the specific number of partitions 44 can be adjusted according to actual production needs. For ease of understanding, we will use three partitions 44 as an example.

[0092] When there are three partitions 44, the cooling chamber 41 is divided into four sections arranged horizontally. The head sub-chamber 45 closest to the reaction chamber 11 refers to the outermost sub-chamber 45 on the side closest to the reaction chamber 11, that is, the innermost sub-chamber 45 located at the first electrode 20 and / or the second electrode 30. The tail sub-chamber 45 furthest from the reaction chamber 11 refers to the outermost sub-chamber 45 on the side furthest from the reaction chamber 11, that is, the outermost sub-chamber 45 located at the first electrode 20 and / or the second electrode 30.

[0093] Thus, one end of the inlet pipe 42 is inserted into the outermost sub-cavity 45 on the side closest to the reaction chamber 11, and one end of the outlet pipe 43 is connected to the outermost sub-cavity 45 on the side furthest from the reaction chamber 11. The cooling medium enters the innermost sub-cavity 45 through the inlet pipe 42, and then passes through each sub-cavity 45 sequentially from the inside to the outside in the first electrode 20 and / or the second electrode 30, finally being discharged from the outermost sub-cavity 45 through the outlet pipe 43 connected to it.

[0094] The above structure can further increase the flow time of the cooling medium in the cooling chamber 41, effectively improving the thermal conductivity and thermal efficiency.

[0095] In some embodiments, the graphitization furnace 100 further includes a flow disruptor 60 disposed in at least one sub-cavity 45.

[0096] Specifically, the baffle 60 may be configured as multiple rotatable blades. By rotating the blades in the corresponding sub-cavity 45, the cooling medium in the sub-cavity 45 can be disturbed, thereby further improving the heat conduction efficiency.

[0097] Furthermore, a baffle 60 can be provided in each sub-cavity 45. Thus, by providing the baffle 60, the thermal conductivity of the cooling medium can be further improved.

[0098] like Figure 4 As shown, in some embodiments, a plurality of partitions 44 are provided inside the cooling chamber 41, and each partition 44 divides the cooling chamber 41 into a plurality of interconnected sub-cavities 45, which are arranged sequentially along the gravity direction a. One end of the water inlet pipe 42 is connected to the bottom sub-cavity 45 along the gravity direction a, and one end of the water outlet pipe 43 is connected to the top sub-cavity 45 along the gravity direction a.

[0099] Specifically, each partition 44 can also be arranged horizontally, that is, each partition 44 is perpendicular to the direction of gravity a. The partitions 44 are arranged at intervals along the direction of gravity a in the cooling cavity 41, thereby dividing the cooling cavity 41 into multiple sub-cavities 45 arranged along the direction of gravity a.

[0100] Furthermore, each partition 44 may have an outlet, through which the cooling medium can flow between the sub-cavities 45.

[0101] Understandably, after being separated by the partitions 44, the sub-cavity 45 located at the bottom along the direction of gravity a is the bottom sub-cavity 45, and the sub-cavity 45 located at the top along the direction of gravity a is the top sub-cavity 45.

[0102] One end of the inlet pipe 42 is inserted into the lowest sub-cavity 45, and one end of the outlet pipe 43 is connected to the uppermost sub-cavity 45. In this way, the cooling medium enters the lowest sub-cavity 45 from the inlet pipe 42, then passes through multiple sub-cavities 45 from bottom to top, and finally reaches the uppermost sub-cavity 45, where it is discharged through the outlet pipe 43.

[0103] The above structure can further increase the flow time of the cooling medium in the cooling chamber 41, effectively improving the thermal conductivity and thermal efficiency.

[0104] like Figure 5 As shown, in some embodiments, the graphitization furnace 100 further includes a turbulence pipe 70 disposed in the cooling chamber 41. The two ends of the turbulence pipe 70 are respectively connected to the water inlet pipe 42 and the water outlet pipe 43, and the turbulence pipe 70 is arranged in a curved extension.

[0105] Specifically, a turbulence-prone pipe 70 can be installed inside the cooling chamber 41. The two ends of the turbulence-prone pipe 70 are connected to the inlet pipe 42 and the outlet pipe 43, respectively, and the turbulence-prone pipe 70 is arranged in a curved extension. In this way, when the cooling medium enters the turbulence-prone pipe 70 from the inlet pipe 42, the cooling medium flows along the turbulence-prone pipe 70 in a curved manner and is finally discharged through the outlet pipe 43.

[0106] The above structure can effectively increase the flow time of the cooling medium in the turbulence pipe 70, thereby improving the thermal conductivity and efficiency of the cooling medium.

[0107] In some embodiments, the water outlet pipe 43 has a connecting section 46 and a bent section 47, the connecting section 46 communicating between the cooling chamber 41 and the bent section 47, and the bent section 47 extending upward along the direction of gravity a relative to the connecting section 46.

[0108] Specifically, the connecting section 46 of the water outlet pipe 43 extends horizontally, with one end of the water outlet pipe 43 connected to the cooling chamber 41 and the other end connected to the bend section 47.

[0109] Furthermore, the bent section 47 is bent upwards along the direction of gravity a compared to the connecting section 46. In this way, when the cooling medium is discharged through the outlet pipe 43, the outlet is higher than the highest liquid level in the cooling chamber 41, which can effectively discharge the air in the cooling chamber 41 and reduce the probability that residual air at the upper end of the cooling chamber 41 will prevent the cooling medium from generating convective heat transfer with the chamber wall.

[0110] Therefore, through the above structure, the air in the cooling chamber 41 can be discharged by the water outlet pipe 43, reducing the probability that residual air at the upper end of the cooling chamber 41 will prevent the cooling medium from generating convective heat transfer with the chamber wall.

[0111] In some embodiments, the cooling element 40 has an exhaust port (not shown in the figure) on its top surface along the gravity direction a, and the graphitization furnace 100 also includes an exhaust pipe 80 with one end connected to the exhaust port.

[0112] Specifically, the exhaust port is located on the top surface of the cooling component 40 and extends upwards. One end of the exhaust pipe 80 is connected to the exhaust port, and the other end can extend upwards.

[0113] In this way, the gas in the cooling chamber 41 can be better discharged through the exhaust port and exhaust pipe 80, so that the cooling medium can be better filled in the cooling chamber 41 and the thermal conductivity can be improved.

[0114] Based on the same concept as the graphitization furnace 100 described above, this application also provides a heat treatment system including the graphitization furnace 100 as described above.

[0115] According to one or more embodiments, in specific use, a mounting groove 33 is formed at the second end 32 of the first electrode 20 and / or the second electrode 30 outside the reaction chamber 11, and a cooling element 40 is disposed within the mounting groove 33. Further, a thermally conductive layer 50 is filled in the accommodating gap between the cooling element 40 and the groove wall of the mounting groove 33.

[0116] During the graphitization process, a cooling medium is introduced into the cooling chamber 41 through the inlet pipe 42. After circulating and exchanging heat within the cooling chamber 41, the cooling medium flows out through the outlet pipe 43. In this process, the cooling medium can carry away the heat from the second end 32 of the first electrode 20 and / or the second electrode 30, thereby achieving cooling.

[0117] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A graphitization furnace, characterized in that, include: The furnace body has a reaction chamber; A first electrode and a second electrode with opposite polarities, at least one of the first electrode and the second electrode having a first end inserted into the reaction chamber and a second end located outside the reaction chamber, wherein a mounting groove is formed on the end face of the second end; and A cooling component is disposed within the mounting groove, and the cooling component has a cooling cavity inside, the cooling cavity being used to contain a cooling medium.

2. The graphitization furnace according to claim 1, characterized in that, The cooling component is made of metal.

3. The graphitization furnace according to claim 1, characterized in that, The cooling component and the wall of the mounting groove form a receiving gap, and the graphitization furnace also includes a heat-conducting layer filled in the receiving gap.

4. The graphitization furnace according to claim 3, characterized in that, The width of the accommodating gap ranges from 2mm to 10mm.

5. The graphitization furnace according to claim 4, characterized in that, The width of the accommodating gap ranges from 3mm to 5mm.

6. The graphitization furnace according to claim 3, characterized in that, The thermal conductivity of the heat-conducting layer is not less than 8 W / (m·K).

7. The graphitization furnace according to claim 3 or 6, characterized in that, The thermal conductivity of the cooling component is greater than that of the thermally conductive layer.

8. The graphitization furnace according to claim 1, characterized in that, The cooling component is provided with an inlet pipe and an outlet pipe that are respectively connected to the cooling cavity, and the outlet pipe is located above the inlet pipe along the direction of gravity.

9. The graphitization furnace according to claim 8, characterized in that, The cooling chamber is provided with multiple partitions, each partition dividing the cooling chamber into multiple interconnected sub-cavities, each sub-cavity being arranged sequentially from the side closest to the reaction chamber to the side furthest from the reaction chamber; One end of the water inlet pipe extends into the head sub-cavity near the reaction chamber, and one end of the water outlet pipe communicates with the tail sub-cavity away from the reaction chamber.

10. The graphitization furnace according to claim 9, characterized in that, The graphitization furnace also includes a flow-disrupting element disposed in at least one of the sub-cavities.

11. The graphitization furnace according to claim 8, characterized in that, The cooling chamber is provided with multiple partitions, each partition dividing the cooling chamber into multiple interconnected sub-cavities, and each sub-cavity is arranged sequentially along the direction of gravity; One end of the water inlet pipe is connected to the sub-cavity located at the bottom in the direction of gravity, and one end of the water outlet pipe is connected to the sub-cavity located at the top in the direction of gravity.

12. The graphitization furnace according to claim 8, characterized in that, The graphitization furnace also includes a turbulence pipe disposed in the cooling chamber, the two ends of which are connected to the water inlet pipe and the water outlet pipe, respectively, and the turbulence pipe is arranged in a curved extension.

13. The graphitization furnace according to any one of claims 8-12, characterized in that, The water outlet pipe has a connecting section and a bent section. The connecting section connects the cooling chamber and the bent section, and the bent section bends upward in the direction of gravity compared to the connecting section.

14. The graphitization furnace according to any one of claims 8-12, characterized in that, The cooling component has an exhaust port on its top surface along the direction of gravity, and the graphitization furnace also includes an exhaust pipe with one end connected to the exhaust port.

15. A heat treatment system, characterized in that, Including the graphitization furnace as described in any one of claims 1-14.

Images