Porous carbon preparation device

Abstract

The utility model provides a porous carbon preparation device which comprises a feeding unit, a reaction unit, a discharging unit and an air supply unit which are sequentially arranged in the material advancing direction, the feeding unit comprises a stock bin and a feeder, an outlet of the stock bin is connected with an inlet of the feeder, and an outlet of the reaction unit is connected with an outlet of the feeder. An outlet of the feeder is connected with a feeding hole in the upper end of the reaction unit through a pipeline; the reaction unit comprises a reaction furnace, and a dispersion plate is arranged at the bottom; the discharging unit comprises a separator and a collector which are connected with each other; the separator is connected with a discharging hole in the upper end of the reaction unit through a pipeline; the gas supply unit comprises a steam generator which is connected with an inlet of a gas preheater through a pipeline, and an outlet of the gas preheater is connected with a gas inlet in the lower end of the reaction unit through a pipeline. The device disclosed by the utility model is simple in structure and convenient to operate, industrial production is easy to realize, and the prepared porous carbon has the characteristics of developed pores, high uniformity, large specific surface area, deeper pore depth, excellent performance and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of porous carbon preparation devices, and specifically to a porous carbon preparation device. Background Art

[0002] The lithium-ion battery industry is rapidly developing due to the rapid development of new energy vehicles and energy storage. Anode materials are key components of lithium-ion batteries and a crucial component of their development. Currently, silicon, due to its ultra-high theoretical specific capacity, has become the leading anode material for lithium-ion batteries. Silicon-based anode materials are primarily categorized into silicon-oxygen and silicon-carbon. Silicon-carbon, with its advantages such as higher specific capacity and higher charge-discharge rates, is particularly promising. As a precursor for silicon-carbon materials, porous carbon has become a key research topic due to its high surface area, rich pore structure, and excellent chemical stability. Currently, the main routes for mass production of porous carbon are aqueous and alkaline methods. The alkaline method, however, has limited prospects due to the high use of alkali during production and the subsequent complex, environmentally unfriendly, and high cost of acid washing. However, the steam activation method, which requires no acid washing and produces no harmful substances, is environmentally friendly and low-cost, making it the most promising method. However, conventional water-based activation devices currently suffer from problems such as uneven uniformity, low efficiency, and the blowing away of powdered raw materials during the activation process. Furthermore, the resulting porous carbon products often have pores on the surface, resulting in poor performance. Therefore, it is of great significance to provide a porous carbon preparation device that can resolve the powder blowing problem during material activation, achieve an efficient and uniform activation process, and produce high-performance porous carbon. Utility Model Content

[0003] In response to the shortcomings of the prior art, the present invention aims to solve one or more of the problems in the prior art. For example, one of the purposes of the present invention is to solve the problem of powder blowing during the material activation process, achieve an efficient and uniform activation process, and enable deeper pores to be produced, thereby improving the quality and performance of porous carbon.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a porous carbon preparation device, which may include: a feeding unit, a reaction unit and a discharging unit arranged in sequence according to the material travel direction, and an air supply unit, wherein the feeding unit includes a silo and a feeder, the silo outlet is connected to the feeder inlet, and the feeder outlet is connected to the feeding port at the upper end of the reaction unit through a pipeline; the reaction unit includes a reactor with a dispersion plate provided at the bottom; the discharging unit includes a separator and a collector connected to each other, and the separator is connected to the discharging port at the upper end of the reaction unit through a pipeline; the air supply unit includes a water vapor generator, the water vapor generator is connected to the inlet of the gas preheater through a pipeline, and the outlet of the gas preheater is connected to the air inlet at the lower end of the reaction unit through a pipeline.

[0005] According to one or more exemplary embodiments of the present invention, a stirring mechanism may be provided in the silo to prevent material from agglomerating.

[0006] According to one or more exemplary embodiments of the present invention, the reaction furnace may include: a furnace body, and a heating mechanism and a heat-insulating layer sequentially arranged on the periphery of the reaction furnace from the inside to the outside.

[0007] According to one or more exemplary embodiments of the present invention, an exhaust port may be provided at the upper end of the furnace body, and the exhaust port is equipped with a filtering mechanism located inside the furnace body.

[0008] According to one or more exemplary embodiments of the present invention, the heating mechanism may include a resistance wire.

[0009] According to one or more exemplary embodiments of the present invention, a plurality of pores may be evenly distributed on the dispersion plate, and the diameter of the pores is 0.5-1.5 mm.

[0010] According to one or more exemplary embodiments of the present invention, the air inlet at the lower end of the reaction unit may include a three-way interface.

[0011] According to one or more exemplary embodiments of the present invention, the upper end of the separator may be connected to a waste tank via a pipeline, and the waste tank is used for collecting and processing waste.

[0012] According to one or more exemplary embodiments of the present invention, the preparation device may further include an electronic control unit configured to control at least one of reaction temperature, reaction time, heating rate, and feed rate.

[0013] According to one or more exemplary embodiments of the present invention, the material of the furnace body and the silo may include one or more of stainless steel, molybdenum metal, and tungsten-lanthanum alloy.

[0014] Compared with the prior art, the beneficial effects of the present invention include at least one of the following:

[0015] (1) The porous carbon preparation device provided by the present invention can evenly disperse the material in the reaction furnace by the gas source dispersed by the dispersion plate, so that the material is fully in contact with the gas source, making the activation process of the water vapor more uniform.

[0016] (2) The filtering mechanism provided in the porous carbon preparation device of the present invention and arranged inside the furnace body has a back-flushing function, which can solve the problem of powdered materials being blown away during the activation process.

[0017] (3) When the porous carbon preparation device provided by the present invention discharges the material after the reaction is completed, the material can be sent out through the discharge pipe by external loading gas to achieve high-temperature discharge, and the feeding reaction can continue at the same time, thereby realizing a continuous and efficient water vapor activation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects and / or features of the present invention will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0019] Figure 1 A schematic structural diagram of a porous carbon preparation device in an exemplary embodiment of the present invention is shown;

[0020] Figure 2 A TEM image of a resin porous carbon produced by a porous carbon preparation device in an exemplary embodiment of the present invention is shown;

[0021] Figure 3 A TEM image of a biomass porous carbon produced by a porous carbon preparation device in an exemplary embodiment of the present invention is shown.

[0022] Description of reference numerals:

[0023] 100-feeding unit, 110-bin, 120-feeder;

[0024] 210-reaction furnace, 211-furnace body, 212-heating mechanism, 213-insulation layer, 214-filtering mechanism, 215-dispersing plate;

[0025] 300-discharging unit, 310-separator, 320-collector, 330-waste tank, 340-discharging pipe;

[0026] 400-gas supply unit, 410-steam generator, 420-gas preheater;

[0027] 500-electronic control unit. DETAILED DESCRIPTION

[0028] Hereinafter, a porous carbon preparation device of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0029] In the description of this application, it should be understood that the terms "upper," "lower," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; they can refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] Exemplary embodiment 1

[0032] The present exemplary embodiment provides a porous carbon preparation apparatus.

[0033] like Figure 1 As shown, the preparation device may include: a feeding unit 100, a reaction unit and a discharging unit 300, and a gas supply unit 400, which are arranged in sequence according to the direction of material movement.

[0034] Among them, the feeding unit 100 includes a silo 110 and a feeder 120, the outlet of the silo 110 is connected to the inlet of the feeder 120, the outlet of the feeder 120 is connected to the feed port at the upper end of the reaction unit through a pipeline, the reaction unit includes a reactor 210, a dispersion plate 215 is provided at the bottom, the discharge unit 300 includes a separator 310 and a collector 320 connected to each other, the separator 310 is connected to the discharge port at the upper end of the reaction unit through a pipeline, the gas supply unit 400 includes a steam generator 410, the steam generator 410 is connected to the inlet of the gas preheater 420 through a pipeline, and the outlet of the gas preheater 420 is connected to the air inlet at the lower end of the reaction unit through a pipeline. Here, the feeder 120 can be a screw feeder, the separator 310 can be a cyclone separator, and the collector 320 is used to collect the prepared porous carbon.

[0035] In this exemplary embodiment, a stirring mechanism (not shown) may be provided within the silo 110 to prevent material clumping. The reactor 210 may include a furnace body 211, a heating mechanism 212, and an insulation layer 213, arranged sequentially around the periphery of the reactor 210 from the inside out. An exhaust port may be provided at the top of the furnace body 211. This exhaust port is equipped with a filter mechanism 214 located within the furnace body 211. This filter mechanism 214 has a backflush function, which prevents powdered material from being blown away during activation. The heating mechanism 212 may include a resistance wire. A dispersion plate 215 may be provided at the bottom of the furnace body 211. The dispersion plate 215 may have multiple pores evenly distributed thereon, each with a diameter of 0.5 to 1.5 mm. The furnace body 211 and the silo 110 may be constructed from one or more of stainless steel, molybdenum metal, and tungsten-lanthanum alloy. The stainless steel may include 310S stainless steel or 314S stainless steel.

[0036] In this exemplary embodiment, the gas inlet at the lower end of the reaction unit may include a three-way interface, which can be used to deliver water vapor and external loading gas, respectively. The external loading gas here can be carbon dioxide or other inert gas, which can be used to dilute the reaction gas source and control the degree of activation reaction.

[0037] In this exemplary embodiment, the upper end of the separator 310 may be connected to a waste tank 330 via a pipeline. The waste tank 330 is used for collecting and processing waste.

[0038] In this exemplary embodiment, the preparation apparatus may further include an electronic control unit 500 configured to control at least one of reaction temperature, reaction time, heating rate, and feeding rate.

[0039] In this exemplary embodiment, the working principle / usage process of the porous carbon preparation device may include:

[0040] The carbon-containing precursor material is placed in the silo 110. The stirring device (not shown in the figure) in the silo 110 can prevent the precursor material from agglomerating. The precursor material is evenly fed into the reactor 210 through a screw feeder. The water vapor generated by the steam generator 410 is heated by the gas preheater 420 and then mixed with carbon dioxide or other inert gases and passed into the furnace from the air inlet at the bottom of the furnace body 211. No external loading gas is required here. The water vapor is evenly distributed through the dispersion plate 215, so that the precursor material is in a uniformly dispersed state in the furnace. The furnace body 211 is heated to perform a steam activation reaction. After the reaction is completed, the material enters the cyclone separator through the pipeline, i.e., the discharge pipe 340, and the porous carbon material separated by the cyclone separator falls into the collector 320 for collection. Figure 2 This is a TEM image of a resin porous carbon produced using the porous carbon preparation device of the utility model. Figure 2 It can be seen that the resin porous carbon material produced by the porous carbon preparation device of the present invention is spherical and has a uniform and rich void structure. Figure 3 This is a TEM image of a biomass porous carbon produced using the porous carbon preparation device of the utility model. Figure 3 It can be seen that the biomass porous carbon material produced by the porous carbon preparation device of the present invention has an irregular granular structure, with a large number of voids distributed on the surface of the particles, and the voids are interconnected to form a porous network.

[0041] In summary, the advantages proposed by the present invention include at least one of the following:

[0042] (1) The porous carbon prepared by the porous carbon preparation device provided by the utility model has the characteristics of developed pores, high uniformity, large specific surface area, deeper pore depth, and excellent performance.

[0043] (2) The porous carbon preparation device provided by the utility model has a simple structure, is easy to operate, and is easy to realize industrial production.

[0044] Although a porous carbon preparation device of the present invention has been described above in combination with exemplary embodiments, it should be clear to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope defined by the claims.

Claims

1. A porous carbon preparation device, characterized in that: The preparation device comprises: a feeding unit, a reaction unit, a discharging unit, and a gas supply unit arranged in sequence according to the direction of material movement, wherein: The feeding unit includes a silo and a feeder, the silo outlet is connected to the feeder inlet, and the feeder outlet is connected to the feed port at the upper end of the reaction unit through a pipeline; The reaction unit includes a reaction furnace with a dispersion plate provided at the bottom; The discharge unit includes a separator and a collector connected to each other, and the separator is connected to the discharge port at the upper end of the reaction unit through a pipeline; The gas supply unit includes a steam generator, which is connected to the inlet of the gas preheater through a pipeline, and the outlet of the gas preheater is connected to the air inlet at the lower end of the reaction unit through a pipeline.

2. The porous carbon preparation device according to claim 1, characterized in that: A stirring mechanism is provided in the silo to prevent the material from agglomerating.

3. The porous carbon preparation device according to claim 1, characterized in that: The reaction furnace comprises a furnace body, and a heating mechanism and a heat-insulating layer which are sequentially arranged on the periphery of the reaction furnace from the inside to the outside.

4. The porous carbon preparation device according to claim 3, characterized in that: An exhaust port is provided at the upper end of the furnace body, and the exhaust port is equipped with a filtering mechanism located inside the furnace body.

5. The porous carbon preparation device according to claim 3, characterized in that: The heating mechanism includes a resistance wire.

6. The porous carbon preparation device according to claim 1, characterized in that: The dispersion plate is evenly distributed with a plurality of pores, each of which has a diameter of 0.5 to 1.5 mm.

7. The porous carbon preparation device according to claim 1, characterized in that: The air inlet at the lower end of the reaction unit includes a three-way interface.

8. The porous carbon preparation device according to claim 1, characterized in that: The upper end of the separator is connected to a waste tank through a pipeline, and the waste tank is used for collecting and processing waste.

9. The porous carbon preparation device according to claim 1, characterized in that: The preparation device further includes an electronic control unit configured to control at least one of reaction temperature, reaction time, heating rate and feeding rate.

10. The porous carbon preparation device according to claim 3, characterized in that: The furnace body and the silo are made of one or more materials selected from the group consisting of stainless steel, molybdenum metal, and tungsten-lanthanum alloy.

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