Electric arc furnace for preparing single-walled carbon nanotubes

Abstract

The utility model belongs to the technical field of nano material preparation, and particularly relates to an electric arc furnace for preparing a single-walled carbon nanotube, which comprises a reaction shell and an electric arc furnace shell sleeved on the outer side of the reaction shell, the baffles are arranged on the two sides of the reaction shell and the electric arc furnace shell; wherein the two baffles are connected with the reaction shell and the electric arc furnace shell, so that a reaction cavity is formed in the reaction shell, and a cooling cavity is formed between the outer wall of the reaction shell and the interior of the electric arc furnace shell; the circulating pipe is spirally arranged on the outer side of the reaction shell and is positioned in the cooling cavity; according to the electric arc furnace for preparing the single-walled carbon nanotubes, the circulating pipe is arranged, and cold water is introduced into the circulating pipe to exchange heat with the reaction shell and the cooling cavity so as to cool the reaction shell and the cooling cavity, so that the effects of rapidly cooling the reaction shell, conveniently and timely taking out a prepared product and improving the preparation efficiency are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of nanomaterial preparation, and particularly relates to an arc furnace for preparing single-walled carbon nanotubes. Background Art

[0002] As a new type of nanomaterial, single-walled carbon nanotubes (SWCNTs) have excellent mechanical and electrical properties, as well as a huge aspect ratio and high specific surface area, and have potential application prospects in aspects such as electrochemical energy storage, catalysis, composites, and nanodevices. Many universities, research institutions, and companies at home and abroad are researching how to mass-produce single-walled carbon nanotubes.

[0003] So far, there are mainly three methods for preparing single-walled carbon nanotubes: chemical vapor deposition, traditional arc discharge method, and laser ablation method; among them, the arc discharge method means that in a reaction cavity filled with a certain gas (inert gas or a mixed gas containing activated gas), an arc discharge occurs between two graphite electrodes (where the anode graphite rod contains a catalyst) under a certain voltage, and carbon atoms are rearranged under a certain temperature and the action of the catalyst to form a hollow tubular product, that is, carbon nanotubes.

[0004] When using the arc discharge method to prepare single-walled carbon nanotubes, an arc furnace is usually used as the reaction cavity, but the existing arc furnace is usually difficult to quickly cool after preparing single-walled carbon nanotubes, and the prepared product cannot be taken out in time, affecting the preparation efficiency.

[0005] Therefore, in order to solve the above problems, it is necessary to design an arc furnace for preparing single-walled carbon nanotubes. Summary of the Utility Model

[0006] The purpose of the utility model is to provide an arc furnace for preparing single-walled carbon nanotubes to solve the technical problem that the existing arc furnace cannot be quickly cooled.

[0007] In order to solve the above technical problems, the utility model provides an arc furnace for preparing single-walled carbon nanotubes, including:

[0008] A reaction shell and an arc furnace outer shell sleeved outside the reaction shell;

[0009] Baffles arranged on both sides of the reaction shell and the arc furnace outer shell; wherein

[0010] The two baffles are connected to the reaction shell and the arc furnace outer shell, so that a reaction cavity is formed inside the reaction shell and a cooling cavity is formed between the outer wall of the reaction shell and the inside of the arc furnace outer shell;

[0011] A circulation pipe spirally arranged outside the reaction shell, which is located in the cooling cavity;

[0012] The water in the circulation pipe is adapted to exchange heat with the reaction housing and the cooling chamber during flow to cool the reaction housing and the cooling chamber.

[0013] Furthermore, a cathode graphite rod is provided on any one of the baffles; wherein

[0014] The cathode graphite rod penetrates through the baffle and one end is located in the reaction chamber;

[0015] An anode graphite rod is provided on the other baffle; wherein

[0016] The anode graphite rod is slidably connected to the baffle to adjust the distance from the cathode graphite rod.

[0017] Furthermore, one end of the cathode graphite rod is connected with a reaction platform; wherein

[0018] The reaction platform is located in the reaction chamber; and

[0019] The reaction platform is adapted to place a catalyst.

[0020] Furthermore, an air inlet pipe is connected to the bottom of the reaction housing; wherein

[0021] The air inlet pipe penetrates through the arc furnace housing.

[0022] Furthermore, a vacuum extraction pipe is connected to the top of the reaction housing; wherein

[0023] The vacuum extraction pipe penetrates through the arc furnace housing.

[0024] Furthermore, a support member is provided on one side of the baffle; wherein

[0025] A driving motor is provided on the support member; and

[0026] The driving motor is adapted to drive the cathode graphite rod to rotate on the baffle.

[0027] Furthermore, one end of the anode graphite rod is connected with a coupling;

[0028] The other end of the coupling is connected with a propulsion member; wherein

[0029] A support frame is provided below the propulsion member; and

[0030] The propulsion member is adapted to push the anode graphite rod to slide on the baffle so that the anode graphite rod approaches the cathode graphite rod to generate an electric arc.

[0031] Furthermore, an observation window is provided on the side surface of the reaction housing.

[0032] Furthermore, a sealing window is provided on the side surface of the arc furnace housing.

[0033] The beneficial effects of the present utility model are:

[0034] (1). In the present utility model, cold water circulates in the circulation pipe, exchanges heat with the reaction housing and the cooling chamber, and then is discharged to the cooling tower for cooling, and this process is repeated. A carbon source gas is introduced into the reaction chamber through the intake pipe, and at the same time, the vacuum pump continuously evacuates the air. Meanwhile, the pusher is controlled to push the anode graphite rod to slide on the baffle plate, so that the anode graphite rod approaches the cathode graphite rod to generate an arc to sinter the carbon source gas, so as to produce carbon nanotubes on the surface of the catalyst on the reaction platform. At this time, the pusher is controlled to push the anode graphite rod to slide on the baffle plate, so that the anode graphite rod moves away from the cathode graphite rod. After cooling, the sealing window and the observation window are opened, the power supply of the cathode graphite rod is disconnected, and the driving motor is started. The driving motor drives the cathode graphite rod and the reaction platform to rotate, so as to facilitate the collection of the carbon nanotubes on the surface of the catalyst. Through the above steps, the reaction housing can be quickly cooled, the prepared product can be taken out in time, and the preparation efficiency can be improved.

[0035] Other features and advantages of the present utility model will be described in the following description of the specification, and in part, will be obvious from the description of the specification, or will be understood by implementing the present utility model. The objectives and other advantages of the present utility model are achieved and obtained by the structures specifically pointed out in the specification and the drawings.

[0036] In order to make the above objectives, features, and advantages of the present utility model more obvious and understandable, the following specifically provides preferred embodiments and, in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0038] Figure 1 is a three-dimensional view of the preferred embodiment of the whole of the present utility model Figure 1 ;

[0039] Figure 2 is a three-dimensional view of the preferred embodiment of the whole of the present utility model Figure 2 ;

[0040] Figure 3 is the front view of the preferred embodiment of the whole of the present utility model.

[0041] In the figure:

[0042] Reaction housing 1, reaction chamber 101, electric arc furnace housing 2, cooling chamber 201, baffle 3, cathode graphite rod 4, anode graphite rod 5, reaction platform 6, intake pipe 7, evacuation pipe 8, support member 9, drive motor 10, coupling 11, pusher 12, support frame 13, observation window 14, sealing window 15, circulation pipe 16. Detailed implementation mode

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Embodiment 1

[0044] As Figures 1 to 3 shown, this embodiment provides an electric arc furnace for preparing single-walled carbon nanotubes, including:

[0045] A reaction housing 1 and an electric arc furnace housing 2 sleeved outside the reaction housing 1; baffles 3 provided on both sides of the reaction housing 1 and the electric arc furnace housing 2; wherein the two baffles 3 are connected to the reaction housing 1 and the electric arc furnace housing 2 so that a reaction chamber 101 is formed inside the reaction housing 1 and a cooling chamber 201 is formed between the outer wall of the reaction housing 1 and the inside of the electric arc furnace housing 2; a circulation pipe 16 spirally arranged outside the reaction housing 1, which is located in the cooling chamber 201; the water in the circulation pipe 16 is adapted to exchange heat with the reaction housing 1 and the cooling chamber 201 when flowing to cool the reaction housing 1 and the cooling chamber 201; wherein the circulation pipe 16 is adapted to be connected to a cooling tower, and cold water circulates in the circulation pipe 16, exchanges heat with the reaction housing 1 and the cooling chamber 201, and then is discharged to the cooling tower for cooling, and so on.

[0046] A cathode graphite rod 4 is provided on any one of the baffles 3; wherein the cathode graphite rod 4 penetrates through the baffle 3 and one end is located in the reaction chamber 101; an anode graphite rod 5 is provided on the other baffle 3; wherein the anode graphite rod 5 is slidably connected to the baffle 3 to adjust the distance from the cathode graphite rod 4.

[0047] One end of the cathode graphite rod 4 is connected to a reaction platform 6; wherein the reaction platform 6 is located in the reaction chamber 101; and the reaction platform 6 is adapted to place a catalyst; wherein the reaction platform 6 is made of, but not limited to, quartz.

[0048] An intake pipe 7 is connected to the bottom of the reaction housing 1; wherein the intake pipe 7 penetrates through the electric arc furnace housing 2; wherein the intake pipe 7 is adapted to introduce a carbon source gas.

[0049] A vacuum extraction tube 8 is connected to the top of the reaction housing 1; the vacuum extraction tube 8 penetrates through the electric arc furnace housing 2; the vacuum extraction tube 8 and the intake pipe 7 are concentrically arranged, and the center between the vacuum extraction tube 8 and the intake pipe 7 is located between the cathode graphite rod 4 and the anode graphite rod 5, so as to facilitate the generation of an electric arc by the cathode graphite rod 4 and the anode graphite rod 5 to sinter the carbon source gas, so as to produce carbon nanotubes on the catalyst surface of the reaction platform 6.

[0050] A support member 9 is provided on one side of the baffle 3; a driving motor 10 is provided on the support member 9; and the driving motor 10 is adapted to drive the cathode graphite rod 4 to rotate on the baffle 3; by arranging the driving motor 10, the driving motor 10 drives the cathode graphite rod 4 and the reaction platform 6 to rotate, so as to facilitate the collection of carbon nanotubes on the catalyst surface.

[0051] One end of the anode graphite rod 5 is connected with a coupling 11; the other end of the coupling 11 is connected with a propulsion member 12; a support frame 13 is provided below the propulsion member 12; and the propulsion member 12 is adapted to push the anode graphite rod 5 to slide on the baffle 3, so that the anode graphite rod 5 approaches the cathode graphite rod 4 to generate an electric arc; the propulsion member 12 is, but not limited to, a hydraulic cylinder.

[0052] An observation window 14 is provided on the side of the reaction housing 1; it is most preferred that the observation window 14 is made of a transparent material; the observation window 14 and the reaction housing 1 are, but not limited to, hinged, so as to facilitate collecting carbon nanotubes after opening; by arranging the observation window 14, the situation inside the reaction chamber 101 can be conveniently observed.

[0053] A sealing window 15 is provided on the side of the electric arc furnace housing 2; the sealing window 15 and the electric arc furnace housing 2 are, but not limited to, hinged, so as to facilitate collecting carbon nanotubes after opening.

[0054] In this embodiment, cold water circulates in the circulation pipe 16, so that the cold water exchanges heat with the reaction housing 1 and the cooling chamber 201 and then is discharged to the cooling tower for cooling, and so on. The carbon source gas is introduced into the reaction chamber 101 through the intake pipe 7, and the vacuum extraction tube 8 continuously extracts vacuum. At the same time, the propulsion member 12 is controlled to push the anode graphite rod 5 to slide on the baffle 3, so that the anode graphite rod 5 approaches the cathode graphite rod 4 to generate an electric arc to sinter the carbon source gas, so as to produce carbon nanotubes on the catalyst surface of the reaction platform 6. At this time, the propulsion member 12 is controlled to push the anode graphite rod 5 to slide on the baffle 3, so that the anode graphite rod 5 moves away from the cathode graphite rod 4. After cooling, the sealing window 15 and the observation window 14 are opened, the power supply of the cathode graphite rod 4 is disconnected, and the driving motor 10 is started. The driving motor 10 drives the cathode graphite rod 4 and the reaction platform 6 to rotate, so as to facilitate the collection of carbon nanotubes on the catalyst surface. Through the above steps, the reaction housing 1 can be quickly cooled, the prepared product can be conveniently taken out in time, and the preparation efficiency can be improved.

[0055] All components selected in this application (components without specific structures described) are common standard components or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0056] In the description of the embodiments of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0057] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0058] Taking the above ideal embodiments of the present utility model as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An electric arc furnace for preparing single-walled carbon nanotubes, characterized in that: include: A reaction shell (1) and an electric arc furnace shell (2) sleeved on the outside of the reaction shell (1); Baffles (3) are arranged on both sides of the reaction shell (1) and the arc furnace shell (2); wherein The two baffles (3) are connected to the reaction shell (1) and the arc furnace shell (2), so that a reaction chamber (101) is formed inside the reaction shell (1) and a cooling chamber (201) is formed between the outer wall of the reaction shell (1) and the inside of the arc furnace shell (2); A circulation pipe (16) spirally arranged on the outside of the reaction shell (1), which is located in the cooling chamber (201); The water in the circulation pipe (16) is suitable for exchanging heat with the reaction shell (1) and the cooling chamber (201) when flowing, so as to cool the reaction shell (1) and the cooling chamber (201).

2. The electric arc furnace for preparing single-walled carbon nanotubes according to claim 1, characterized in that: A cathode graphite rod (4) is provided on any of the baffles (3); wherein The cathode graphite rod (4) passes through the baffle (3) and one end of the cathode graphite rod is located in the reaction chamber (101); The other baffle (3) is provided with an anode graphite rod (5); wherein The anode graphite rod (5) is slidably connected to the baffle (3) to adjust the distance from the cathode graphite rod (4).

3. The electric arc furnace for preparing single-walled carbon nanotubes according to claim 2, characterized in that: One end of the cathode graphite rod (4) is connected to a reaction platform (6); wherein The reaction platform (6) is located in the reaction chamber (101); and The reaction platform (6) is suitable for placing a catalyst.

4. The electric arc furnace for preparing single-walled carbon nanotubes according to claim 3, characterized in that: The bottom of the reaction housing (1) is connected to an air inlet pipe (7); wherein The air inlet pipe (7) passes through the arc furnace shell (2).

5. The electric arc furnace for preparing single-walled carbon nanotubes according to claim 4, characterized in that: The top of the reaction shell (1) is connected to a vacuum tube (8); The vacuum tube (8) passes through the outer shell (2) of the electric arc furnace.

6. The electric arc furnace for preparing single-walled carbon nanotubes according to claim 5, characterized in that: A support member (9) is provided on one side of the baffle (3); wherein The support member (9) is provided with a driving motor (10); and The driving motor (10) is suitable for driving the cathode graphite rod (4) to rotate on the baffle (3).

7. The electric arc furnace for preparing single-walled carbon nanotubes according to claim 6, characterized in that: One end of the anode graphite rod (5) is connected to a coupling (11); The other end of the coupling (11) is connected to a propulsion member (12); wherein A support frame (13) is provided below the propulsion member (12); and The pushing member (12) is suitable for pushing the anode graphite rod (5) to slide on the baffle (3), so that the anode graphite rod (5) is close to the cathode graphite rod (4) to generate an arc.

8. The electric arc furnace for preparing single-walled carbon nanotubes according to claim 7, characterized in that: An observation window (14) is provided on the side of the reaction housing (1).

9. The electric arc furnace for preparing single-walled carbon nanotubes according to claim 8, characterized in that: A sealing window (15) is provided on the side of the arc furnace shell (2).

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