Silicon-carbon negative electrode material reaction device
By adopting a temperature field partitioning cylinder design in the silicon-carbon anode material reaction device, the problem of low raw material utilization rate was solved, resulting in a more efficient preparation process, reduced costs, and improved mixing and fluidization effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN SAPFIT MACHINERY CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-07-21
AI Technical Summary
Existing fluidized bed devices for preparing silicon-carbon anode materials suffer from low raw material utilization.
A silicon-carbon anode material reaction device is adopted, which includes a vertically arranged reactor body, a heating mechanism, a stirring mechanism, and a temperature field dividing cylinder. By wrapping the heating mechanism on the outside of the reactor body and setting the temperature field dividing cylinder inside, a temperature field division is formed, realizing the preparation process of low-temperature adsorption inside the cylinder and high-temperature pyrolysis outside the cylinder, thereby improving the utilization rate of raw material gas.
It improves the utilization rate of raw material gas, reduces preparation costs, and achieves more uniform mixing and fluidization effects through the design of the temperature field dividing cylinder, thereby improving the efficiency of the preparation process.
Smart Images
Figure CN224524723U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of silicon-carbon anode material production and preparation technology, and in particular to a silicon-carbon anode material reaction device. Background Technology
[0002] In existing technologies, most methods use silane gas as the silicon source, acetylene as the carbon source, and porous carbon as the carrier to prepare silicon-carbon anode materials. Specifically, the porous carbon carrier is placed in a fluidized bed reactor, and then an inert gas is introduced to remove oxygen. After heating to a specified temperature, the silane gas introduced into the reactor is thermally decomposed into silicon and hydrogen atoms. The silicon atoms are deposited and fill the pores of the porous carbon. Next, the carbon source gas introduced into the reactor is thermally decomposed into carbon and hydrogen atoms. The carbon atoms are deposited and coat the outer surface of the porous carbon filled with silicon atoms in the pores, thus forming the silicon-carbon anode material.
[0003] In the actual preparation process of silicon-carbon anode materials, when the raw material gas (including any one or a mixture of inert gas, silane gas and carbon source gas) enters the reactor body for reaction, the fluidization of the raw material gas is generally assisted only by the stirring mechanism set at the bottom of the reactor body, resulting in low utilization rate of raw materials. Utility Model Content
[0004] The purpose of this invention is to propose a silicon-carbon anode material reaction device that can effectively solve the technical problem of low raw material utilization in existing fluidized bed devices used to prepare silicon-carbon anode materials, thereby overcoming the shortcomings of the existing technology.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A silicon-carbon anode material reaction device includes a vertically arranged reactor body, a heating mechanism, a stirring mechanism, and a temperature field dividing cylinder;
[0007] The heating mechanism is wrapped around the outside of the reactor body and is used to heat the reactor body; the stirring mechanism is located at the bottom of the reactor body and is used to stir the material inside the reactor body.
[0008] The temperature field dividing cylinder is installed inside the lower part of the reactor body, and a pyrolysis gap is left between the reactor body and the temperature field dividing cylinder; the temperature field dividing cylinder has a hollow structure, and the top and bottom of the temperature field dividing cylinder are connected to the interior of the reactor body.
[0009] Preferably, the stirring blades of the stirring mechanism are rotatably mounted inside the temperature field dividing cylinder.
[0010] Preferably, the temperature field dividing cylinder includes a cylinder body and supporting legs;
[0011] The cylinder is a hollow cylindrical structure;
[0012] The support legs are provided in multiple ways, and the multiple support legs are circumferentially spaced at the bottom edge of the cylinder. The cylinder is installed to the inner bottom of the reactor body through the support legs.
[0013] Preferably, the height of the cylindrical body is 1 / 10 to 2 / 3 of the height of the straight cylindrical section of the reactor body.
[0014] Preferably, the inner diameter of the cylinder is 1 / 10 to 9 / 10 of the inner diameter of the straight section of the reactor body.
[0015] Preferably, the top of the reactor body is provided with a tail gas outlet, which is connected to the inlet of the tail gas treatment device.
[0016] Preferably, the bottom of the reactor body is provided with a discharge port, which is connected to the inlet of the finished product tank for storing silicon-carbon anode materials.
[0017] The technical solution provided by this utility model can include the following beneficial effects:
[0018] This design incorporates a temperature field partitioning cylinder inside the reactor body. Since the heating mechanism is enclosed on the outside of the reactor body, a temperature field partitioning is created where the temperature inside the cylinder is lower and the temperature outside is higher. This results in a preparation process where adsorption dominates inside the cylinder, while pyrolysis dominates outside. When the porous carbon raw material is fluidized inside the reactor body, it easily circulates within and outside the temperature field partitioning cylinder under the transport gas flow, allowing the adsorption-pyrolysis process to proceed in an orderly manner. This improves the utilization rate of the raw material gas and reduces preparation costs. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the working process of a silicon-carbon anode material reaction device according to this utility model.
[0020] Figure 2 This is a schematic diagram of the structure of a silicon-carbon anode material reaction device according to this utility model.
[0021] Figure 3 This is a partial structural schematic diagram of a silicon-carbon anode material reaction device according to this utility model.
[0022] The components include: reactor body 1, pyrolysis gap 11, tail gas outlet 12, discharge port 13, heating mechanism 2, stirring mechanism 3, temperature field dividing cylinder 4, cylinder 41, support legs 42, tail gas treatment device 5, and finished product tank 6. Detailed Implementation
[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0024] This technical solution provides a silicon-carbon anode material reaction device, including a vertically arranged reactor body 1, a heating mechanism 2, a stirring mechanism 3, and a temperature field dividing cylinder 4;
[0025] The heating mechanism 2 is wrapped around the outside of the reactor body 1 and is used to heat the reactor body 1; the stirring mechanism 3 is located at the bottom of the reactor body 1 and is used to stir the material inside the reactor body 1.
[0026] The temperature field dividing cylinder 4 is installed inside the lower part of the reactor body 1, and a pyrolysis gap 11 is left between the reactor body 1 and the temperature field dividing cylinder 4; the temperature field dividing cylinder 4 has a hollow structure, and the top and bottom of the temperature field dividing cylinder 4 are connected to the interior of the reactor body 1.
[0027] To address the low raw material utilization rate in existing fluidized bed reactors used for preparing silicon-carbon anode materials, this technical solution proposes a silicon-carbon anode material reaction apparatus, such as... Figure 1-3 As shown, it includes a vertically arranged reactor body 1, a heating mechanism 2, a stirring mechanism 3, and a temperature field dividing cylinder 4.
[0028] To improve the utilization rate of the raw material gas, this scheme adds a temperature field dividing cylinder 4 inside the reactor body 1. Since the heating mechanism 2 is wrapped around the outside of the reactor body 1, a temperature field division is formed in the temperature field dividing cylinder 4, with a lower temperature inside the cylinder and a higher temperature outside the cylinder (i.e., the pyrolysis gap 11). The low temperature promotes the adsorption of porous carbon, while the high temperature promotes gas pyrolysis, thus forming a preparation process in which adsorption is the main process inside the cylinder and pyrolysis is the main process outside the cylinder. When the porous carbon raw material is fluidized inside the reactor body 1, it is easy to achieve circulation inside and outside the temperature field dividing cylinder 4 under the transport gas flow of the raw material gas, so that the adsorption-pyrolysis process proceeds in an orderly manner, which is more conducive to improving the utilization rate of the raw material gas and reducing the preparation cost.
[0029] The temperature field partitioning cylinder 4 in this application mainly solves two problems. The first is temperature: during silicon deposition, a low-temperature section is needed for gas-solid mixing, allowing the gas to enter the channels of porous carbon before contacting the high-temperature section for pyrolysis. It is undesirable for the gas to pyrolyze on the periphery of the porous carbon. The temperature field partitioning cylinder can prevent the gas inside the cylinder from pyrolyzing prematurely. The second is fluidization: after setting the temperature field partitioning cylinder, the inner diameter and area of the cylinder are reduced, and the distribution of the same amount of gas will be more uniform, which will improve the uniformity of mixing (this is because the gas is dispersed from the center to the periphery, and the gas velocity on the outside will be reduced; the larger the diameter, the lower the gas velocity on the outside). At the same time, the same volume of powder inside the cylinder will be piled up higher, and the gas passage time will be longer, which can reduce the negative effect of low utilization caused by the rapid passage of powder due to increased gas velocity.
[0030] It should be noted that the heating mechanism 2 in this solution can be a heating tube, and the stirring mechanism 3 can be a rotating stirring blade.
[0031] Furthermore, the stirring blades of the stirring mechanism 3 are rotatably mounted inside the temperature field dividing cylinder 4. This further facilitates the fluidization process.
[0032] To further explain, the temperature field dividing cylinder 4 includes a cylinder body 41 and supporting legs 42;
[0033] The cylinder 41 is a hollow cylindrical structure;
[0034] Multiple support feet 42 are provided, and the multiple support feet 42 are circumferentially spaced at the bottom edge of the cylinder 41. The cylinder 41 is installed in the inner bottom of the reactor body 1 through the support feet 42. In this way, it is beneficial to achieve mutual communication between the cylinder 41 and the reactor body 1, and avoid affecting the fluidization of the reaction raw materials in the reactor body 1.
[0035] To further clarify, the height of the cylindrical body 41 is 1 / 10 to 2 / 3 of the height of the straight cylindrical section of the reactor body 1. For example... Figure 2 As shown, the height of the cylinder 41 is h, and the height of the straight section of the reactor body 1 is H.
[0036] To further clarify, the inner diameter of the cylindrical body 41 is 1 / 10 to 9 / 10 of the inner diameter of the straight cylindrical section of the reactor body 1. The inner diameter of the cylindrical body 41 refers to the inner wall diameter of the cylindrical body 41, and the inner diameter of the straight cylindrical section of the reactor body 1 refers to the inner wall diameter of the straight cylindrical section.
[0037] To further explain, the top of the reactor body 1 is provided with a tail gas outlet 12, which is connected to the inlet of the tail gas treatment device 5.
[0038] After the reaction is complete, the exhaust gas generated in the circulating reactor unit 3 can be treated by the exhaust gas treatment device 5 before being discharged, which is beneficial to environmental protection. It should be noted that the exhaust gas treatment device 5 in this solution is a conventional exhaust gas treatment device in this field, and its specific structure will not be described in detail here.
[0039] To further explain, the bottom of the reactor body 1 is provided with a discharge port 13, which is connected to the inlet of the finished product tank 6 used for storing silicon-carbon anode materials.
[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0042] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.
[0043] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0044] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0045] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0046] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.
Claims
1. A silicon-carbon anode material reaction device, characterized in that: It includes a vertically arranged reactor body, a heating mechanism, a stirring mechanism, and a temperature field dividing cylinder; The heating mechanism is wrapped around the outside of the reactor body and is used to heat the reactor body; the stirring mechanism is located at the bottom of the reactor body and is used to stir the material inside the reactor body. The temperature field dividing cylinder is installed inside the lower part of the reactor body, and a pyrolysis gap is left between the reactor body and the temperature field dividing cylinder; the temperature field dividing cylinder has a hollow structure, and the top and bottom of the temperature field dividing cylinder are connected to the interior of the reactor body.
2. The silicon-carbon anode material reaction device according to claim 1, characterized in that: The stirring blades of the stirring mechanism are rotatably mounted inside the temperature field dividing cylinder.
3. The silicon-carbon anode material reaction device according to claim 1, characterized in that: The temperature field dividing cylinder includes a cylinder body and supporting legs; The cylinder is a hollow cylindrical structure; The support legs are provided in multiple ways, and the multiple support legs are circumferentially spaced at the bottom edge of the cylinder. The cylinder is installed to the inner bottom of the reactor body through the support legs.
4. The silicon-carbon anode material reaction device according to claim 3, characterized in that: The height of the cylindrical body is 1 / 10 to 2 / 3 of the height of the straight cylindrical section of the reactor body.
5. The silicon-carbon anode material reaction device according to claim 3, characterized in that: The inner diameter of the cylinder is 1 / 10 to 9 / 10 of the inner diameter of the straight section of the reactor body.
6. The silicon-carbon anode material reaction device according to claim 1, characterized in that: The reactor body has a tail gas outlet at the top, which is connected to the inlet of the tail gas treatment device.
7. The silicon-carbon anode material reaction device according to claim 1, characterized in that: The bottom of the reactor body has a discharge port, which is connected to the inlet of the finished product tank used to store silicon-carbon anode materials.