Composite spray gun applied to production of carbon nanotubes

Abstract

The utility model provides a composite spray gun applied to production of carbon nanotubes. The water inlet is connected with constant-temperature cooling water, and the mixing pipeline is inserted into the inner side of the circulating water pipe, so that when the cooling water enters the circulating water pipe, the cooling water can cool the mixing pipeline, the mixing pipeline can be protected and prevented from being damaged by high temperature of a boiler, and the service life of the spray gun is prolonged. Meanwhile, the cooling water can protect the carbon source in the mixing pipeline, so that the catalyst and the carbon source are in a low-temperature state before entering high-temperature synthesis, and the reaction stability can be ensured. In conclusion, the composite spray gun can stably run for a long time in production and application, and the product quality consistency is good.

Description

Technical Field

[0001] This utility model relates to the field of carbon nanotube production technology, and in particular to a composite spray gun used in the production of carbon nanotubes. Background Technology

[0002] In the production of carbon nanotubes, chemical vapor deposition (CVD) is commonly used. The spray gun is a key piece of equipment used to mix the carbon source gas and catalyst precursor and transport them to a high-temperature reactor for reaction. However, because the spray gun needs to extend into the high-temperature furnace, the mixing pipe is exposed to a high-temperature environment for extended periods. This makes it susceptible to deformation and cracking due to thermal stress or material aging, leading to a shortened spray gun life and affecting production stability. Simultaneously, outside the high-temperature furnace, if the temperature of the mixing pipe is too high, the carbon source gas and catalyst may undergo partial thermal decomposition or pre-reaction, resulting in reduced reactivity and affecting the growth efficiency and product consistency of carbon nanotubes.

[0003] Therefore, there is an urgent need for a new type of spray gun structure that can effectively reduce the temperature of the mixing pipe, avoid high-temperature damage, and ensure that the carbon source and catalyst remain in a low-temperature stable state before entering the reactor, thereby improving the durability of the spray gun and the controllability of the reaction. Utility Model Content

[0004] In view of the above problems, this utility model is proposed to provide a composite spray gun for use in the production of carbon nanotubes that overcomes or at least partially solves the above problems. It can solve the problems of poor durability and poor reaction stability of existing spray guns, and achieve the effect of improving the durability and reaction stability of the spray gun.

[0005] Specifically, this utility model provides a composite spray gun for use in the production of carbon nanotubes. The composite spray gun for use in the production of carbon nanotubes includes:

[0006] A circulating water pipe, wherein the circulating water pipe is provided with a circulating water inlet and a circulating water outlet;

[0007] A mixing pipe is coaxially arranged with the circulating water pipe and fixedly inserted into the circulating water pipe; both ends of the circulating water pipe are sealed to the mixing pipe so that a water passage cavity is formed between the mixing pipe and the circulating water pipe; a carbon source inlet pipe is provided at the left end of the mixing pipe.

[0008] The catalyst conduit is coaxial with the mixing conduit and is fixedly inserted into the mixing conduit; the left end of the catalyst conduit is the catalyst inlet.

[0009] Optionally, the circulating water pipe is provided with an inlet pipe; the circulating water inlet and the circulating water outlet are both located on the left side of the circulating water pipe; one end of the inlet pipe is connected to the circulating water inlet, and the other end extends to the right end of the water passage cavity.

[0010] Optionally, the right end of the catalyst pipe is at least flush with the right end of the circulating water pipe, so that the right end outlet of the catalyst pipe is located at the end of the mixing pipe that extends out of the circulating water pipe.

[0011] Optionally, a fixed flange is fixedly fitted onto the circulating water pipe; the fixed flange is located on the right side of the circulating water inlet and the circulating water outlet.

[0012] Optionally, the carbon source inlet pipe is perpendicular to the mixing pipe, and a first connecting flange is provided at the upper opening; a second connecting flange is provided at the left end of the mixing pipe, and the second connecting flange is used to seal the left end of the mixing pipe.

[0013] The composite spray gun used in the production of carbon nanotubes in this invention includes a circulating water pipe, a mixing pipe, and a catalyst pipe, with the circulating water pipe located outside the mixing pipe. A constant-temperature cooling water inlet is connected. Since the mixing pipe is inserted into the circulating water pipe, the cooling water cools the mixing pipe upon entering, protecting it from damage caused by high boiler temperatures and extending the spray gun's lifespan. Simultaneously, the cooling water also protects the carbon source within the mixing pipe, ensuring that the catalyst and carbon source remain at a low temperature before high-temperature synthesis, thus guaranteeing reaction stability. In summary, the composite spray gun can operate stably for extended periods in production applications, resulting in consistent product quality.

[0014] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0015] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0016] Figure 1 This is a schematic structural diagram of a composite spray gun used in the production of carbon nanotubes according to an embodiment of the present invention.

[0017] Figure 2This is a schematic top view of a composite spray gun used in the production of carbon nanotubes according to an embodiment of the present invention.

[0018] Figure 3 yes Figure 2 A cross-sectional view along the AA direction.

[0019] In the diagram: 100, circulating water pipe; 110, circulating water inlet; 120, circulating water outlet; 130, water inlet pipe; 140, fixed flange; 200, mixing pipe; 210, spray gun nozzle; 220, water passage chamber; 230, carbon source inlet pipe; 240, first connecting flange; 300, catalyst pipe; 310, catalyst inlet; 320, second connecting flange. Detailed Implementation

[0020] The following reference Figures 1 to 3 This description pertains to a composite spray gun used in the production of carbon nanotubes according to embodiments of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0021] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] Figure 1 This is a schematic structural diagram of a composite spray gun used in the production of carbon nanotubes, such as... Figure 1 As shown, and refer to Figures 2 to 3 This utility model provides a composite spray gun for use in the production of carbon nanotubes. The composite spray gun includes a circulating water pipe 100, a mixing pipe 200, and a catalyst pipe 300. The circulating water pipe 100 is provided with a circulating water inlet 110 and a circulating water outlet 120. The mixing pipe 200 is coaxially arranged with the circulating water pipe 100 and fixedly inserted into it. Both ends of the circulating water pipe 100 are sealed to the mixing pipe 200, forming a water passage cavity 220 between them. A carbon source inlet pipe 230 is provided at the left end of the mixing pipe 200. The catalyst pipe 300 is coaxial with the mixing pipe 200 and fixedly inserted into it. The left end of the catalyst pipe 300 is a catalyst inlet 310.

[0025] Specifically, the composite spray gun is fixedly installed on the boiler, with part of the spray gun inserted into the boiler. A constant-temperature cooling water inlet is connected. Since the mixing pipe 200 is inserted into the circulating water pipe 100, when the cooling water enters the circulating water pipe 100, it cools the mixing pipe 200, protecting it from damage caused by the boiler's high temperatures and thus extending the spray gun's service life. Simultaneously, the cooling water also protects the carbon source within the mixing pipe 200, ensuring that the catalyst and carbon source remain at a low temperature before entering the high-temperature synthesis stage, thereby guaranteeing reaction stability. In summary, the composite spray gun can operate stably for a long time in production applications, resulting in consistent product quality.

[0026] During operation, the composite spray gun is first fixedly installed on the boiler, and cooling water is introduced into the water passage chamber 220 from the circulating water inlet 110. At the same time, the carbon source is introduced into the mixing pipe 200 from the carbon source inlet, and the catalyst enters into the catalyst pipe 300 from the catalyst inlet 310, so that the reaction takes place in the boiler.

[0027] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the circulating water pipe 100 is provided with an inlet pipe 130, and the circulating water inlet 110 and the circulating water outlet 120 are both located on the left side of the circulating water pipe 100. One end of the inlet pipe 130 is connected to the circulating water inlet 110, and the other end extends to the right end of the water passage chamber 220.

[0028] Specifically, because the nozzle of the composite spray gun is located on the right side (e.g. Figure 2 As shown), the composite spray gun needs to be inserted into the boiler from the right side. Therefore, the arrangement of the circulating water inlet 110 and the circulating water outlet 120 on the left side of the circulating water pipe 100 makes the circulating water inlet 110 and the circulating water outlet 120 located on the outside of the boiler, which facilitates water intake and discharge.

[0029] Furthermore, the arrangement of the inlet pipe 130 allows the circulating inlet 110 to extend to the far right of the circulating water pipe 100, thereby enabling cooling water to be directly introduced into the right side of the circulating water pipe 100. The cooling water then flows from the far right to the far left of the circulating water pipe 100, completely covering all the mixing pipes 200 within the circulating water pipe 100, thus ensuring the cooling effect of the mixing pipes 200.

[0030] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the right end of the catalyst pipe 300 is at least flush with the right end of the circulating water pipe 100, so that the right end outlet of the catalyst pipe 300 is located at the end of the mixing pipe 200 that extends out of the circulating water pipe 100.

[0031] Specifically, the section of the mixing pipe 200 extending out of the circulating water pipe 100 at its right end is the spray nozzle 210. Since the spray nozzle 210 requires a carbon source and catalyst to react, this part does not require cooling water treatment. Therefore, the right end of the catalyst pipe 300 is set at least flush with the right end of the circulating water pipe 100, which allows the catalyst and carbon source to mix and react within the spray nozzle 210.

[0032] In some embodiments of this utility model, such as Figure 1 As shown, a fixing flange 140 is fixedly fitted onto the circulating water pipe 100. The fixing flange 140 is located on the right side of the circulating water inlet 110 and the circulating water outlet 120. Specifically, the fixing flange 140 is used to fix it to the boiler.

[0033] In some embodiments of this utility model, such as Figure 1 As shown, the carbon source inlet pipe 230 is perpendicular to the mixing pipe 200, and a first connecting flange 240 is provided at its upper opening. A second connecting flange 320 is provided at the left end of the mixing pipe 200, which is used to seal the left end of the mixing pipe 200. Specifically, the first connecting flange 240 is connected to a carbon source device. The second connecting flange 320 is connected to a catalyst device.

[0034] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A composite spray gun for use in the production of carbon nanotubes, characterized in that, include: A circulating water pipe, wherein the circulating water pipe is provided with a circulating water inlet and a circulating water outlet; A mixing pipe is coaxially arranged with the circulating water pipe and fixedly inserted into the circulating water pipe; both ends of the circulating water pipe are sealed to the mixing pipe so that a water passage cavity is formed between the mixing pipe and the circulating water pipe; a carbon source inlet pipe is provided at the left end of the mixing pipe. The catalyst conduit is coaxial with the mixing conduit and is fixedly inserted into the mixing conduit; the left end of the catalyst conduit is the catalyst inlet.

2. The composite spray gun used in the production of carbon nanotubes according to claim 1, characterized in that, The circulating water pipe is equipped with an inlet pipe; the circulating water inlet and the circulating water outlet are both located on the left side of the circulating water pipe; one end of the inlet pipe is connected to the circulating water inlet, and the other end extends to the right end of the water passage cavity.

3. The composite spray gun used in the production of carbon nanotubes according to claim 1, characterized in that, The right end of the catalyst pipe is at least flush with the right end of the circulating water pipe, so that the right end outlet of the catalyst pipe is located at the end of the mixing pipe that extends out of the circulating water pipe.

4. The composite spray gun used in the production of carbon nanotubes according to claim 2, characterized in that, A fixed flange is fixedly fitted onto the circulating water pipe; the fixed flange is located on the right side of the circulating water inlet and the circulating water outlet.

5. The composite spray gun used in the production of carbon nanotubes according to claim 1, characterized in that, The carbon source inlet pipe is perpendicular to the mixing pipe, and a first connecting flange is provided at the upper opening; a second connecting flange is provided at the left end of the mixing pipe, and the second connecting flange is used to seal the left end of the mixing pipe.

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