A graphitization furnace with in-furnace heat extraction

Abstract

The application provides a graphitization furnace for heat extraction in a furnace, comprising a furnace body, a high-temperature-resistant insulation part and a heat extraction part, the high-temperature-resistant insulation part is detachably arranged in a furnace cavity of the furnace body, and is used for forming a heat extraction area separated from a material body in the furnace cavity of the furnace body; and the heat extraction part is arranged in the furnace body and located in the heat extraction area. The application separates a heat extraction area in the furnace cavity of the graphitization furnace through the high-temperature-resistant insulation part, arranges the heat extraction part in the heat extraction area, and uses the high-temperature-resistant heat extraction pipe to realize heat extraction in the cooling stage, so that active and rapid cooling of the graphitization furnace is realized. In the material body filling and discharging stage, the high-temperature-resistant insulation part can be used to protect the heat extraction part, so that the heat extraction part is prevented from being damaged in the process. In the cooling stage, the high-temperature-resistant insulation part is removed, so that rapid heat extraction and rapid cooling can be realized through the heat extraction part, the production cycle of the graphitization furnace is shortened, and high economic benefits are obtained.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of graphitization furnace, and particularly relates to a graphitization furnace with heat extraction in the furnace. BACKGROUND

[0002] The Acheson graphitization furnace is provided with carbon blank and granular material in a long furnace body made of refractory material, and the carbon blank and the granular material form a conductive furnace core. Heat insulation material is arranged around the furnace core. Electrically conductive electrodes are arranged on the two end walls of the furnace head and connected with a power source to form a power circuit. When the circuit is connected, the furnace core generates heat due to the resistance effect, and the carbon blank is converted into artificial graphite through high-temperature heat treatment at a temperature of 2200-2300 DEG C. According to the temperature change, the whole processing process can be divided into three stages of heating, heat preservation and cooling. Since the high-temperature environment in the furnace cannot be cooled by conventional cooling water pipes, the industry generally adopts a natural cooling method for cooling, and the cooling period is long and the heat energy is wasted. Some existing technologies that use active cooling are limited to electrode cooling and outer side cooling of the furnace wall, and cannot realize furnace cooling, so the cooling effect is limited. Therefore, it is necessary to develop a graphitization furnace that can realize heat extraction in the furnace and the heat extraction structure is not easily damaged during the filling and discharging of the material body in the furnace. SUMMARY

[0003] The present application aims to solve at least one of the above technical problems in the prior art. To this end, the present application provides a graphitization furnace with heat extraction in the furnace, which can realize heat extraction in the furnace and protect the heat extraction structure.

[0004] The graphitization furnace with heat extraction in the furnace according to the embodiment of the present application comprises a furnace body, a high-temperature-resistant insulation part and a heat extraction part. The high-temperature-resistant insulation part is detachably arranged in the furnace cavity of the furnace body, and is used to form a heat extraction area separated from the material body in the furnace cavity of the furnace body. The heat extraction part is arranged in the furnace body and located in the heat extraction area.

[0005] The graphitization furnace with heat extraction in the furnace according to the embodiment of the present application has at least the following beneficial effects:

[0006] The graphitization furnace with heat extraction in the furnace arranged in the above structure directly separates a heat extraction area in the furnace cavity of the graphitization furnace through the high-temperature-resistant insulation part, and arranges the heat extraction part in the heat extraction area. The heat extraction part can use high-temperature-resistant heat extraction pipes to extract heat in the cooling stage, and realize active and rapid cooling of the graphitization furnace. In the filling and discharging stages of the material body, the heat extraction part can be protected by the high-temperature-resistant insulation part to avoid damage to the heat extraction part during the process. At the same time, the high-temperature-resistant insulation part can also block heat in the heating and heat preservation stages to reduce the heat absorption of the heat extraction part. In the cooling stage, the high-temperature-resistant insulation part can be removed to realize rapid heat extraction and rapid cooling through the heat extraction part, shorten the production cycle of the graphitization furnace, and have high economic benefits.

[0007] According to some embodiments of the present application, the high-temperature-resistant insulation part is formed by the furnace wall of the furnace body.

[0008] According to some embodiments of the present application, at least two columns are arranged on the inner side of the furnace wall of the furnace body, and the high-temperature-resistant insulation part is inserted on the at least two columns.

[0009] According to some embodiments of the present application, a recess is arranged on the inner side of the furnace wall of the furnace body, and the high-temperature-resistant insulation part is inserted on the two opposite side walls of the recess.

[0010] According to some embodiments of the present application, the high-temperature-resistant insulation part is a ceramic plate or a silicon carbide plate.

[0011] According to some embodiments of the present application, a heat radiation plate is arranged between the heat extraction part and the high-temperature-resistant insulation part.

[0012] According to some embodiments of the present application, the heat radiation plate is a quartz plate.

[0013] According to some embodiments of the present application, the heat extraction part is provided with a heat extraction pipe cluster, and heat absorption fins are arranged between the heat extraction pipe cluster.

[0014] According to some embodiments of the present application, a counter-radiation layer is arranged on the side wall of the furnace core away from the heat extraction area.

[0015] According to some embodiments of the present application, an emergency liquid discharge structure is arranged at the bottom of the heat extraction area of the furnace body.

[0016] Additional aspects and advantages of the present application will be given, partially in the following description, partially become obvious from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in conjunction with the drawings and examples, in which:

[0018] Figure 1 A schematic view of a heat extraction area in the present application;

[0019] Figure 2 A schematic view of a first structure provided with a heat radiation plate;

[0020] Figure 3 A schematic view of a second structure provided with a heat radiation plate;

[0021] Figure 4 A schematic view of a structure without a heat radiation plate;

[0022] Figure 5A position diagram of the liquid outlet;

[0023] Figure 6 A first structure diagram of the heat extraction part;

[0024] Figure 7 A second structure diagram of the heat extraction part. DETAILED DESCRIPTION

[0025] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0026] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0027] In the description of the present application, the plural refers to two or more. If there is a description of first, 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 number of technical features indicated or the sequence of technical features indicated.

[0028] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0029] Reference Figures 1 to 7As shown, the graphite furnace for taking heat in the furnace of an embodiment of the present application comprises a furnace body 100, a high-temperature-resistant insulation part 103 and a heat taking part 102. The high-temperature-resistant insulation part 103 is detachably arranged in the furnace cavity of the furnace body 100, and is used to form a heat taking area separated from the material body in the furnace cavity of the furnace body 100. The heat taking part 102 is arranged in the furnace body 100 and located in the heat taking area. It can be understood that the heat taking area is a region formed in the furnace cavity by the high-temperature-resistant insulation part 103, and therefore the installation base body is still the furnace body 100 when the heat taking part 102 is installed and fixed. In the graphite furnace for taking heat in the furnace of the embodiment, the heat taking part 102 and the high-temperature-resistant insulation part 103 are installed and fixed before the material body is filled, so as to avoid damage to the heat taking part 102 and leakage of the cooling medium during the filling of the material body. Since the furnace is in a high-temperature electric field and magnetic field environment during the heating and holding stage, the heat taking part 102 can be prevented from being damaged by the complex environment in the furnace by arranging the high-temperature-resistant insulation part 103, and the heat absorption of the heat taking part 102 can also be reduced. During the whole heating and holding stage, the heat taking part 102 will also be affected by heat, and the medium in the heat taking part 102 can be kept at a suitable temperature. During the cooling stage, the worker removes the high-temperature-resistant insulation part 103, so that the heat taking part 102 directly faces the high-temperature material field in the furnace, thereby rapidly cooling the graphite furnace.

[0030] In summary, the graphite furnace for taking heat in the furnace arranged in the above structure directly separates a heat taking area in the furnace cavity of the graphite furnace by the high-temperature-resistant insulation part 103, arranges the heat taking part 102 in the heat taking area, and the heat taking part 102 can be cooled during the cooling stage by the high-temperature heat taking pipe, so as to realize the active and rapid cooling of the graphite furnace. During the filling and discharging of the material body, the heat taking part 102 can be protected by the high-temperature-resistant insulation part 103, so as to avoid damage to the heat taking part 102 during the process. Meanwhile, the high-temperature-resistant insulation part 103 can also block heat during the heating, heating and holding stages, so as to reduce the heat absorption of the heat taking part 102. During the cooling stage, the high-temperature-resistant insulation part 103 is removed, and the heat taking part 102 can be rapidly heated and cooled, thereby shortening the production cycle of the graphite furnace and having extremely high economic benefits.

[0031] In some embodiments of the present application, the high-temperature-resistant insulation part 103 is arranged by the furnace wall of the furnace body 100 and forms the heat taking area by the furnace wall of the furnace body 100. The structure arranged in the embodiment relies on the furnace cavity to arrange the high-temperature-resistant insulation part 103, so as to not only take heat and cool in the furnace, but also help to reduce the installation difficulty. Since the heat taking part 102 needs to be installed on the furnace body 100, the structure arranged in the embodiment facilitates the installation of the heat taking part 102.

[0032] In some embodiments of the present application, two columns 101 are arranged on the inner side of the furnace wall of the furnace body 100 corresponding to each high-temperature-resistant insulation part 103, and the high-temperature-resistant insulation part 103 is arranged between the two columns 101, so as to form a heat extraction area in which the heat extraction part 102 is arranged by the two columns 101 and the furnace wall of the furnace body 100. It can be understood that a column 101 can also be arranged between the two columns 101, so that the high-temperature-resistant insulation part 103 passes through the middle column 101.

[0033] In other embodiments, a recess is arranged on the inner side of the furnace wall of the furnace body 100, and the high-temperature-resistant insulation part 103 is arranged in the two opposite side walls of the recess, so as to form a heat extraction area.

[0034] It should be noted that in the above two embodiments, the heat extraction area is formed by relying on the furnace wall of the furnace body 100, and in addition, the high-temperature-resistant insulation part 103 can also be arranged in the furnace cavity to form a heat extraction area independent of the furnace wall of the furnace body 100, such as arranging four columns 101 and arranging the high-temperature-resistant insulation part 103 between the four columns 101 to form a rectangular heat extraction area. The number and distribution of the heat extraction areas can be flexibly set according to the actual size, structure and heat dissipation requirements of the graphitization furnace, and are not limited to being arranged in alignment on the two side walls of the furnace body 100.

[0035] In some embodiments of the present application, the high-temperature-resistant insulation part 103 is a ceramic plate or a silicon carbide plate, and its specific shape can be set as a straight plate, an arc-shaped plate, a special-shaped curved plate, etc. The high-temperature-resistant insulation part 103 adopts the above-mentioned plate structure, which can first realize insulation to meet the electric field and magnetic field environment in the furnace, and at the same time, its material has the characteristics of high temperature resistance, can withstand the high temperature environment in the furnace and will not be damaged, and has general or even poor heat conduction performance, has a certain heat insulation effect, and is helpful to reduce heat loss during the heating and holding stages. And this material has a certain strength and is not easy to be damaged during the filling stage of the material body, which can effectively protect the heat extraction part 102. It can be understood that the high-temperature-resistant insulation part 103 can also adopt other materials or structures, as long as it can meet the above requirements.

[0036] When the column 101 is arranged, the column 101 can be made of graphite material, or can be made of refractory bricks or other high-temperature-resistant materials to ensure the service life.

[0037] In some embodiments of the present application, the heat extraction zone is provided with a heat radiation plate 104 between the heat extraction part 102 and the high-temperature-resistant insulation part 103, so as to radiate the heat in the furnace to the heat extraction part 102 through the heat radiation plate 104, and prevent the heat extraction load from being too large in the early stage of heat extraction, thereby avoiding too large impact on the heat extraction system. Specifically, the heat radiation plate 104 is provided as a quartz plate. Through the provision of the quartz plate, the heat extraction part 102 can extract heat more uniformly and be heated more uniformly, and at the same time, the heat extraction part 102 can be separated from the material body, thereby prolonging the service life of the heat extraction part 102. At the same time, when the heat extraction part 102 leaks medium, the medium can be isolated to avoid contacting the material body, thereby being safer and helping to ensure the qualified rate of the material body.

[0038] In some embodiments of the present application, the heat extraction part 102 adopts a pipe structure, and each heat extraction zone is provided with one or more pipes according to the actual size, and when a plurality of pipes are provided, the heat extraction part 102 is a heat extraction pipe cluster. In order to improve the effect and cooling efficiency, the heat extraction pipe cluster is provided with heat absorption fins 1021. The heat extraction pipe cluster and the heat absorption fins 1021 can be further provided with a high-temperature-resistant far-infrared radiation ceramic energy-saving coating layer to enhance the radiation and heat absorption effect. It can be understood that the specific shape and structure of the heat absorption fins 1021 can be flexibly set, which can adopt a sheet structure or a rod structure.

[0039] In some embodiments of the present application, the heat extraction zone is provided with a counter-radiation layer on the side wall away from the furnace core of the furnace body 100. Thus, the counter-radiation layer is used for heat counter-radiation, so that the side of the heat extraction part 102 away from the furnace core can quickly absorb heat, and the heat can be secondarily absorbed. It can be understood that when the heat extraction zone is attached to the furnace wall, the counter-radiation layer is arranged on the inner wall of the furnace wall, and when the heat extraction zone is independent of the furnace wall, the counter-radiation layer is arranged on the high-temperature-resistant insulation part 103 close to the furnace wall and away from the furnace core. Obviously, when the heat extraction zone is independent of the furnace wall, the high-temperature-resistant insulation part 103 on the side away from the furnace core can not be removed.

[0040] In some embodiments of the present application, the furnace body 100 is provided with an emergency liquid discharge structure at the bottom of the heat extraction zone. Specifically, taking the case that the heat extraction zone is attached to the furnace wall as an example, the emergency liquid discharge structure includes a liquid discharge port 105 arranged on the furnace wall, and the liquid discharge port 105 is located at the lowest point of the heat extraction zone and is normally blocked by a plug.

[0041] In some embodiments of the present application, the heat extraction part 102 adopts a heat pipe structure, the lower end of the heat pipe structure extends into the heat extraction zone, the upper end of the heat pipe structure extends to the outside of the furnace body 100, and a heat dissipation system is correspondingly arranged.

[0042] In some embodiments of the present application, the heat extraction part 102 is provided as a heat extraction pipe, a medium channel is arranged in the heat extraction pipe, and the medium channel is connected to a medium system outside the furnace body 100 to perform medium delivery. The medium can be water, carbon dioxide, molten salt, nitrogen, oil, etc. In embodiments without a quartz plate, the outside of the heat extraction pipe is protected by a quartz tube or a high-temperature-resistant structure, thereby protecting the heat extraction pipe.

[0043] In some embodiments of the present application, the heat extraction pipe is a U-shaped pipe, and the medium input ends of each heat extraction pipe are connected in parallel, and the medium output ends are connected in parallel.

[0044] The above describes the present application in detail in combination with embodiments, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present application.

Claims

1. A graphitization furnace for in-furnace heat extraction, characterized in that, include: Furnace body; A high-temperature resistant insulating part is detachably disposed in the furnace cavity of the furnace body, and is used to form a heat extraction zone separated from the material in the furnace cavity of the furnace body; A heat-extracting unit is disposed in the furnace body and located in the heat-extracting zone; The high-temperature resistant insulating part is attached to the furnace wall of the furnace body and forms the heat extraction zone by the furnace wall of the furnace body; At least two columns are spaced apart on the inner side of the furnace wall of the furnace body, and the high-temperature resistant insulating part is inserted on the at least two columns. Alternatively, the inner side of the furnace wall of the furnace body is provided with a recess, and the high-temperature resistant insulating part is inserted into the two side walls opposite the recess.

2. The graphitization furnace for in-furnace heat extraction according to claim 1, characterized in that, The high-temperature resistant insulating part is a ceramic plate or a silicon carbide plate.

3. The graphitization furnace for in-furnace heat extraction according to claim 1, characterized in that, The heat-generating zone is provided with a heat radiation plate between the heat-generating part and the high-temperature resistant insulation part.

4. The graphitization furnace for in-furnace heat extraction according to claim 3, characterized in that, The heat radiation plate is a quartz plate.

5. The graphitization furnace for in-furnace heat extraction according to claim 1, characterized in that, The heat-extracting part is provided with a cluster of heat-extracting tubes, and heat-absorbing fins are provided between the clusters of heat-extracting tubes.

6. The graphitization furnace for in-furnace heat extraction according to claim 1, characterized in that, The heat extraction zone has an anti-radiation layer on the side wall of the furnace core away from the furnace body.

7. The graphitization furnace for in-furnace heat extraction according to claim 1, characterized in that, The furnace body is equipped with an emergency drainage structure at the bottom of the heat extraction zone.

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