Tandem type continuous graphitization device

Abstract

The utility model discloses a tandem type continuous graphitization device, which belongs to the field of chemical reaction devices and comprises two coaxially connected cylinders, a heating element arranged along the axial direction is arranged at the centers of the two cylinders, a plurality of crucibles are arranged in a hollow cavity in the heating element, one end of the heating element is provided with a cylinder, and the other end of the heating element is connected with a cooling pipe. The two independent cylinder bodies are connected, materials are preheated in the front cylinder body, the rear cylinder body is far away from the feeding end, it can be guaranteed that the preset temperature is reached, the carbon materials are stably graphitized, and the quality of the graphite materials is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the graphite device technical field, specifically a series connection type continuous graphitization device. BACKGROUND

[0002] Graphitization refers to the process of converting non-graphitic carbon materials into carbon materials with graphite structure under high temperature (usually at 2300-3000 DEG C). In the battery field, the carbon material after graphitization has good electrical conductivity and layered structure, which can facilitate the embedding and extraction of lithium ions, and is an important part of the negative electrode material of lithium ion battery, which helps to improve the charge-discharge performance and cycle stability of the battery.

[0003] In the process of material graphitization, both smooth feeding and continuous production and high temperature of 2300-3000 DEG C need to be ensured, which is difficult to achieve with existing graphitization devices. Usually, the temperature is not enough, which affects the quality of graphite materials and further affects the battery performance. INVENTION CONTENTS

[0004] The utility model aims at providing a series connection type continuous graphitization device to solve at least one problem in the above background technology.

[0005] The utility model provides a series connection type continuous graphitization device, including two coaxial connecting cylinder, two cylinder center is equipped with the heating element along the axial arrangement, the inside hollow cavity of heating element is placed with a plurality of crucible, heating element one end is equipped with the cylinder, the other end is connected with cooling pipe.

[0006] Further scheme: the both ends of the cylinder are provided with end covers, a center hole is formed in the center of the end cover for the heating element to pass through, a connecting part is arranged in the center hole, one side wall of the connecting part is in contact with the heating element, and the connecting parts at the two ends of the cylinder are connected to the positive and negative electrodes of the power supply respectively.

[0007] Further scheme: the side wall of the cooling pipe is provided with an air inlet.

[0008] Further scheme: the length of the cooling pipe is not less than the length of the crucible.

[0009] Further scheme: an exhaust pipe is arranged through the side wall of the cylinder, and one end of the exhaust pipe communicates with the inside hollow cavity of the heating element.

[0010] Further scheme: two filling openings are formed in the side wall of the cylinder, and the two filling openings are located on the two sides of the exhaust pipe.

[0011] Further scheme: a cap is arranged on the filling opening.

[0012] Further scheme: a heat preservation material is filled between the cylinder and the heating element.

[0013] Further scheme: the top of the crucible is provided with a flat feed inlet, and the outer wall surface shape of the crucible matches the inner wall surface of the inner hollow cavity of the heating body.

[0014] Further scheme: further comprising a base, and the cylinder is arranged on the base.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] 1. two independent cylinders are connected, the material is preheated in the first cylinder, and the second cylinder is away from the feeding end, so that the preset temperature is reached, the carbon material is stably graphitized, and the quality of the graphite material is guaranteed.

[0017] 2. the material is placed in the heating body through the crucible, the cylinder can drive the crucible to move from the first cylinder to the second cylinder, then the cylinder is withdrawn, the crucible is supplemented at the feeding end of the heating body, the crucible is continuously driven to move to the second cylinder, and the cycle is repeated until the heating body is filled with the crucible. The crucible that is graphitized is pushed to the cooling pipe for cooling and then taken out, the cylinder drives all the crucibles to move backward as a whole, then the cylinder is withdrawn, and the crucible is supplemented, so that the continuous and high-quality production of the carbon material graphitization is realized.

[0018] 3. the cooling pipe is provided with an air inlet, inert gas is blown to the heating body from back to front through the air inlet, the air entering the feeding end is reduced, and a small amount of air entering from the feeding end is diluted and discharged. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in combination with the drawings.

[0020] Figure 1 It is a structure schematic view of the preferred embodiment of the utility model;

[0021] Figure 2 It is a structure schematic view of the crucible in the preferred embodiment of the utility model.

[0022] In the drawing: 1-cylinder;11-heating body;12-connection component;13-exhaust pipe;14-filling port;15-cap;2-end cover;3-flange;4-crucible;41-feeding inlet;5-cylinder;51-push head;6-base;7-cooling pipe;71-air inlet. DETAILED DESCRIPTION

[0023] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Unless specifically stated otherwise, the relative arrangements of parts and steps, numerical expressions, and numerical values set forth in the various examples herein are not limiting. Also, it should be understood that the dimensions of the various parts shown in the drawings are not necessarily to scale. Techniques, methods, and devices known to those of ordinary skill in the art can not be discussed in detail, but rather can be assumed to be known by those of ordinary skill in the art. In the examples shown and discussed herein, any specific values should be interpreted as merely illustrative of the examples, and not as a limitation thereon. Thus, other examples of the exemplary embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the various figures and the specification, and thus, once an item is defined in one figure, it is not necessary to discuss it further in connection with other figures, unless explicitly stated to do so.

[0025] In the description of the present application, it should be understood that the use of the words "first", "second", and the like do not limit the corresponding parts, but are merely used to distinguish the corresponding parts, and therefore, the above words do not have special meanings unless otherwise stated, and therefore, should not be understood as limiting the scope of protection of the present application.

[0026] In the description of the present application, it should be noted that unless otherwise specifically stated and limited, the terms "mounting", "connecting", and "connecting" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "top", "bottom", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another element or feature as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, elements described as "above" or "above" other elements or features would then be oriented "below" or "below" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.

[0028] Referring to Figure 1 As shown in the drawings, the embodiment provides a series of continuous graphitization device, including two coaxially connected cylinder 1, two cylinder 1 center is arranged along the axial heating body 11, the inside hollow cavity of heating body 11 is placed with several crucible 4, heating body 11 one end is equipped with air cylinder 5, the other end is connected with cooling pipe 7. The former cylinder is called first cylinder, the latter cylinder is called second cylinder, crucible 4 is used for containing material, air cylinder 5 is located at the feeding end of first cylinder, cooling pipe 7 is located at the discharging end of second cylinder. Because the feeding end of heating body 11 needs to realize continuous feeding, it is open, and the temperature and atmosphere have certain difference with the requirement of graphitization, and the preheating of carbon material is mainly realized in the first cylinder. The telescopic rod of air cylinder 5 can be extended into the feeding end of heating body 11 to push the crucible 4 placed in the inside hollow cavity of heating body 11, and the crucible 4 will move in turn. The telescopic rod of air cylinder 5 can also be retracted to exit the inside hollow cavity of heating body 11, at which time the crucible 4 can be supplemented in the feeding end of heating body 11.

[0029] The embodiment adopts two independent cylinders 1 connected, preheats the material in the first cylinder, and the second cylinder is away from the feeding end, which can guarantee that the inside hollow cavity of heating body 11 of the second cylinder reaches the preset temperature to stably graphitize the carbon material and guarantee the quality of the graphite material. The material is placed in the heating body 11 through the crucible 4, the air cylinder 5 can push the crucible 4 to move from the first cylinder to the second cylinder, and then the air cylinder 5 is retracted to supplement the crucible 4 in the feeding end of heating body 11, the air cylinder 5 continues to push the crucible 4 to move to the second cylinder, and the cycle is repeated until the heating body 11 is full of crucible 4. The crucible 4 completed graphitization will be pushed to the cooling pipe 7 for cooling and then taken out, the air cylinder 5 pushes all the crucibles 4 to move as a whole, and then the air cylinder 5 is retracted to supplement the crucible 4, so as to realize the continuous high-quality production of carbon material graphitization and improve the production efficiency.

[0030] Preferably, in order to ensure that the cooling pipe 7 can accommodate at least one crucible 4 for cooling, the length of the cooling pipe 7 is not less than the length of the crucible 4, and in order to facilitate the removal of the crucible 4 in the cooling pipe 7, the end of the cooling pipe 7 is provided with a closable plug (not shown in the figure). Preferably, the air cylinder 5 can be selected to have a stroke, and the stroke of the air cylinder is equivalent to the length of one crucible 4, so that the air cylinder 5 can push and retract one crucible 4 to the cooling pipe 7 for cooling, and can supplement one crucible 4 to the feeding end of the heat source 11 each time.

[0031] Further, the side wall of the cooling pipe 7 is provided with an air inlet 71, and the air inlet 71 is connected with an inert gas source pipe. The side wall of the cylinder body 1 is provided with an exhaust pipe 13 penetrating through, and one end of the exhaust pipe 13 communicates with the internal hollow cavity of the heat source 11. The inert gas blows from the rear to the front of the heating body 11, providing a stable reaction environment for graphitization, improving the graphitization degree, and reducing the air entering the feeding end of the heating body 11, diluting and discharging the small amount of air entering from the feeding end through the exhaust pipe 13.

[0032] In some embodiments, referring to Figure 1 As shown, the cylinder body 1 is provided with an end cover 2 at both ends, and the center hole of the end cover 2 is provided with a connecting component 12, and one side wall of the connecting component 12 is in contact with the heat source 11. The connecting components 12 at both ends of the cylinder body 1 are connected to the positive and negative electrodes of the power supply. Because the heat source 11 needs to provide a very high heat, it needs to provide a stable power supply with low voltage and high current to the heat source 11 through the connecting component 12, so a rectifier cabinet connected to the power supply is configured, and the connecting components 12 at both ends of the cylinder body 1 are connected to the positive and negative output terminals of the rectifier cabinet. The heat source 11 can be selected as a graphite tube. Graphite is a good conductive material and has a certain resistance. When current passes through, heat will be generated due to the existence of resistance. Moreover, the resistance of the graphite tube will change with the change of temperature. Generally speaking, the resistance will increase with the increase of temperature, and the generated heat will further increase, which is suitable for the heating body with high temperature requirement.

[0033] Further, the end cover 2 and the cylinder body 1 form a cavity therebetween and are located outside the periphery of the heat source 11. The cavity between the cylinder body 1 and the heat source 11 is filled with heat preservation material to reduce heat loss of the heat source 11. In order to further reduce heat loss and ensure the safety of the equipment, the cylinder body 1 adopts a multi-layer structure, and from the outside to the inside, it is a steel plate layer, an asbestos plate layer, and a graphite felt layer.

[0034] Further, the end cover 2 is connected with a flange 3, and the first cylinder body and the second cylinder body are connected through the flange 3. The connecting component 12 is installed in the center hole of the flange 3, and the heat source 11 is installed in the connecting component 12 and penetrates through the connecting component 12.

[0035] In some embodiments, please refer to Figure 1 As shown in the figure, the barrel body 1 side wall is provided with two filling openings 14, and the two filling openings 14 are respectively located on both sides of the exhaust pipe 13, which facilitates filling and replacing the heat preservation material in the cavity between the barrel body 1 and the heating body 11. Preferably, the filling opening 14 is provided with a cap 15.

[0036] In some embodiments, please refer to Figure 2 As shown in the figure, the crucible 4 top is provided with a flat feed inlet 41, and the outer wall surface shape of the crucible 4 matches the inner wall surface of the internal cavity of the heating body 11, which facilitates the sliding of the crucible 4 in the internal cavity of the heating body 11 under the action of the air cylinder 5.

[0037] In some embodiments, please refer to Figure 1 As shown in the figure, the telescopic rod of the air cylinder 5 is provided with a push head 51, which facilitates the uniform application of the pushing force to the crucible 4.

[0038] In some embodiments, please refer to Figure 1 As shown in the figure, the barrel body 1 is arranged on the base 6, and the air cylinder 5 and the cooling pipe 7 are both provided with a support, so that the telescopic rod of the air cylinder 5, the heating body 11 and the cooling pipe 7 are located on the same axis, which facilitates the smooth movement of the crucible 4 from the heating body 11 of the first barrel body to the heating body 11 of the second barrel body, and then to the cooling pipe 7, so as to complete the preheating, graphitization and cooling processes.

[0039] The above is only an example and description of the structure of the present application, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the present application or exceed the scope defined by the present application, which shall belong to the protection scope of the present application.

Claims

1. A series type continuous graphitization apparatus characterized by comprising: The application relates to a heating device comprising two coaxially connected barrels, the centers of the two barrels being provided with heat-generating bodies arranged along the axial direction, a plurality of crucibles being arranged in the hollow cavities of the heat-generating bodies, a cylinder being arranged at one end of the heat-generating body, and a cooling pipe being connected to the other end of the heat-generating body.

2. A series type continuous graphitization apparatus according to claim 1, wherein End covers are arranged at the two ends of the barrel, the center of each end cover is provided with a center hole for the heat-generating body to pass through, a connecting component is arranged in the center hole, one side wall of the connecting component is in contact with the heat-generating body, and the connecting components at the two ends of the barrel are respectively connected to the positive and negative poles of a power supply.

3. A series type continuous graphitization apparatus according to claim 1, wherein The side wall of the cooling pipe is provided with an air inlet.

4. A series type continuous graphitization apparatus according to claim 1, wherein The length of the cooling pipe is not less than the length of the crucible.

5. A series type continuous graphitization apparatus according to claim 1, wherein An exhaust pipe is arranged through the side wall of the barrel, and one end of the exhaust pipe is communicated with the hollow cavity of the heat-generating body.

6. A series flow continuous graphitization apparatus according to claim 5, wherein Two filling openings are arranged on the side wall of the barrel, and the two filling openings are respectively located on the two sides of the exhaust pipe.

7. A series flow continuous graphitization apparatus according to claim 6, wherein A cap is arranged on the filling opening.

8. A series flow continuous graphitization apparatus according to claim 1, wherein Thermal insulation material is filled between the barrel and the heat-generating body.

9. A series flow continuous graphitization apparatus according to claim 1, wherein The top of the crucible is provided with a planar feeding opening, and the outer wall surface shape of the crucible is matched with the inner wall surface of the hollow cavity of the heat-generating body.

10. A series flow continuous graphitization apparatus according to claim 1, wherein A base is further arranged, and the barrel is arranged on the base.

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