Fluidized bed reactor for single-walled carbon nanotube production

Abstract

This utility model discloses a fluidized bed reactor for the production of single-walled carbon nanotubes, specifically relating to the field of fluidized bed reactor technology. It includes a reactor for producing single-walled carbon nanotubes, with multiple sound-insulating plates on the outer surface of the reactor. Each sound-insulating plate includes a sound-insulating layer, and one side of the sound-insulating layer has a sound-absorbing layer in contact with the outer wall of the reactor. In practical operation, the sound-absorbing layer, through the viscous resistance and inertial collision of the porous material, converts mid-to-high frequency sound energy into heat energy for dissipation. The sound-insulating layer, through the mass law of high-density metal plates, blocks the transmission of low-frequency sound waves. When the reactor vibrates, the damping springs deform, and in conjunction with dampers and damping rubber sleeves, effectively reducing reactor vibration and thus noise generated by vibration. This provides effective sound insulation during reactor operation, reducing noise-induced harm to workers.

Description

Technical Field

[0001] This utility model relates to the field of fluidized bed reactor technology, and in particular to a fluidized bed reactor for the production of single-walled carbon nanotubes. Background Technology

[0002] Single-walled carbon nanotubes are a type of nanomaterial with a high aspect ratio. Their unique tubular structure gives them excellent physical, chemical, and mechanical properties, making them promising for applications in nanoelectronic devices, optical devices, and composite materials. Fluidized bed reactors are commonly used to produce single-walled carbon nanotubes.

[0003] A search revealed, for example, a utility model with publication number CN222131829U, which discloses a fluidized bed reactor for the production of single-walled carbon nanotubes. This reactor includes a reaction shell and preheating and storage tanks installed on both sides of the reaction shell. A feed connector is electrically connected between the reaction shell and the preheating tank. However, during operation, the catalyst particles inside the fluidized bed reactor are not completely uniformly suspended. Locally, uneven gas distribution or particle size differences can lead to the formation of "particle clusters." The violent collisions between these clusters and the reactor wall, as well as between the clusters themselves, generate mechanical noise. Furthermore, the vibrations from external equipment such as fans and compressors are transmitted to the reactor, causing structural vibration noise. This noise can be harmful to workers. The utility model in question does not provide effective sound insulation during operation. Therefore, to address these shortcomings, the inventors propose a fluidized bed reactor for the production of single-walled carbon nanotubes. Utility Model Content

[0004] The main objective of this invention is to provide a fluidized bed reactor for the production of single-walled carbon nanotubes, which can effectively solve the problem that existing fluidized bed reactors are not easy to effectively insulate during operation.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A fluidized bed reactor for the production of single-walled carbon nanotubes includes a reactor for producing single-walled carbon nanotubes. The outer surface of the reactor is provided with multiple sound insulation panels. Each sound insulation panel includes a sound insulation layer, and one side of the sound insulation layer is provided with a sound absorption layer that contacts the outer wall of the reactor. The bottom surface of the reactor is provided with four vibration damping components.

[0006] Preferably, the sound insulation layer has four connection holes on one side and four first mounting holes on one side, and both the sound insulation layer and the sound absorption layer have multiple ventilation holes on one side.

[0007] Preferably, the sound-absorbing layer has four second mounting holes on one side, and the four second mounting holes correspond one-to-one with the four first mounting holes. The sound-absorbing layer also has four embedding grooves on one side, and each of the four embedding grooves has a fixing hole inside.

[0008] Preferably, the vibration damping assembly includes a lower support plate and an upper connecting plate fixedly connected to the bottom surface of the reactor. A vibration damping spring is fixedly connected between the bottom surface of the upper connecting plate and the top surface of the lower support plate. A telescopic rod is fixedly connected between the bottom surface of the upper connecting plate and the top surface of the lower support plate, and the vibration damping spring is sleeved on the outer end of the telescopic rod. A damper is fixedly installed between the bottom surface of the upper connecting plate and the top surface of the lower support plate.

[0009] Preferably, a vibration damping rubber sleeve is fixedly connected between the bottom surface of the upper connecting plate and the top surface of the lower support plate, and the vibration damping spring and damper are both located inside the vibration damping rubber sleeve.

[0010] Preferably, the outer surface of the vibration damping rubber sleeve is provided with multiple ventilation holes, and a dustproof net is fixedly installed inside the ventilation holes.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This utility model discloses a fluidized bed reactor for the production of single-walled carbon nanotubes. By setting a sound insulation plate, in actual operation, the sound-absorbing layer converts mid-to-high frequency sound energy into heat energy dissipation through the viscous resistance and inertial collision of the porous material. The sound insulation layer blocks the transmission of low-frequency sound waves through the mass law of the high-density metal plate. When the reactor vibrates, the damping spring will deform. In conjunction with the damper and the damping rubber sleeve, the vibration of the reactor can be effectively reduced, thereby reducing the noise generated by the vibration. Thus, effective sound insulation can be achieved when the reactor is running, reducing the damage to workers caused by noise. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the sound insulation panel structure of this utility model; Figure 3 For the present utility model Figure 2 Enlarged view of section A in the middle; Figure 4 This is a schematic diagram of the vibration damping component structure of this utility model; Figure 5 This is a schematic diagram of the vibration-damping rubber sleeve structure of this utility model.

[0013] In the diagram: 1. Reactor; 2. Sound insulation board; 201. Sound insulation layer; 202. Connection hole; 203. First mounting hole; 204. Sound absorption layer; 205. Ventilation hole; 2041. Second mounting hole; 2042. Fixing hole; 2043. Embedded groove; 101. Upper connecting plate; 102. Damper; 103. Lower support plate; 104. Vibration damping spring; 105. Telescopic rod; 106. Vibration damping rubber sleeve; 1061. Vent hole; 1062. Dustproof net. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] This utility model discloses a fluidized bed reactor for the production of single-walled carbon nanotubes, such as... Figure 1-5 As shown, the reactor includes a reactor 1 for producing single-walled carbon nanotubes. When the reactor 1 is running, transition metal nanoparticles are uniformly loaded into the reactor 1 to form an initial fixed bed. After the air is replaced by an inert gas, the reactor is heated to a certain temperature to remove oxides from the catalyst surface and expose the active sites.

[0016] Reactor 1 is heated to the target temperature by external jacketing or electric heating. After the raw gas and carrier gas are mixed, they are heated to a certain temperature by an external preheating device to avoid the low temperature affecting the reaction efficiency.

[0017] The carrier gas carrying the carbon source is injected into the bottom of reactor 1 at a certain flow rate. When the gas flow rate reaches the catalyst's "minimum fluidization velocity", the catalyst particles are suspended and move violently, forming a stable fluidized bed.

[0018] At high temperatures, the carbon source decomposes into adsorbed carbon atoms on the catalyst surface. The carbon atoms are adsorbed on the catalyst surface defects and diffuse into the interior of the catalyst lattice for storage. When the carbon concentration exceeds the critical value, carbon atoms precipitate and nucleate at the edges or defects of the catalyst particles, and grow into tubular SWCNTs along the particle surface in a directional arrangement.

[0019] The exhaust gas enters the cyclone separator, where large catalyst particles are trapped and returned to reactor 1 for recycling. The remaining fine catalyst particles are separated from SWCNTs by a ceramic membrane filter or an electrostatic precipitator, and finally, high-purity SWCNT products are collected.

[0020] The outer surface of the reactor 1 is provided with multiple sound insulation panels 2. The sound insulation panel 2 includes a sound insulation layer 201, and one side of the sound insulation layer 201 is provided with a sound absorption layer 204 that contacts the outer surface of the reactor 1. The bottom surface of the reactor 1 is provided with four vibration damping components.

[0021] The sound-absorbing layer 204, made of ceramic fiber felt, absorbs mid-to-high frequency mechanical noise, while the sound-insulating layer 201, made of galvanized steel plate, can block low-frequency turbulent noise.

[0022] Four connection holes 202 are provided on one side of the sound insulation layer 201, and four first mounting holes 203 are provided on one side of the sound insulation layer 201. Multiple ventilation holes 205 are provided on one side of both the sound insulation layer 201 and the sound absorption layer 204. When the reactor 1 is running, its outer wall will continue to heat up due to the heat released by the reaction or the waste heat of the tail gas. The ventilation holes 205 can dissipate the heat.

[0023] The sound-absorbing layer 204 has four second mounting holes 2041 on one side, and the four second mounting holes 2041 correspond one-to-one with the four first mounting holes 203. The sound-absorbing layer 204 has four embedding grooves 2043 on one side, and each of the four embedding grooves 2043 has a fixing hole 2042 inside, and the four fixing holes 2042 correspond one-to-one with the four connecting holes 202.

[0024] The sound-absorbing layer 204 is attached to one side of the sound insulation layer 201 with high-temperature resistant silicone sealant. After the two are attached, the bolts are inserted into the overlapping connection hole 202 and fixing hole 2042 to complete the assembly of the sound insulation board 2, so that the sound-absorbing layer 204 is tightly attached to the outer wall of the reactor 1.

[0025] After assembly, the first mounting hole 203 will coincide with the second mounting hole 2041. Then, the bolts are passed through the coincident first mounting hole 203 and second mounting hole 2041, and the sound insulation plate 2 can be placed on the outer wall of the reactor 1. Silicone sealant is filled at the joint of the sound insulation plate 2 to prevent noise from leaking through the gap.

[0026] When the noise generated by the operation of reactor 1 is transmitted to the sound insulation board 2, the sound wave first contacts the outer surface of the sound-absorbing layer 204. When the sound wave propagates inside the porous ceramic fiber felt, it will push the fibers or particles in the material to move relative to each other. Due to the viscous force between the fibers and the air, this relative movement will be resisted, causing some of the sound energy to be converted into internal friction heat energy between the fibers and the air. When the sound wave reaches the sound insulation layer 201, the sound insulation layer 201, which is made of galvanized steel plate, blocks the transmission of the sound wave by the mass law, reducing the radiation of noise to the external environment.

[0027] The vibration damping assembly includes a lower support plate 103 and an upper connecting plate 101 fixedly connected to the bottom surface of the reactor 1. A vibration damping spring 104 is fixedly connected between the bottom surface of the upper connecting plate 101 and the top surface of the lower support plate 103. A telescopic rod 105 is fixedly connected between the bottom surface of the upper connecting plate 101 and the top surface of the lower support plate 103. The vibration damping spring 104 is sleeved on the outer end of the telescopic rod 105. When vibration is transmitted to the upper connecting plate 101, the vibration damping spring 104 will deform, and the telescopic rod 105 will extend and retract accordingly. The direction of deformation of the vibration damping spring 104 can be limited by the telescopic rod 105.

[0028] A damper 102 is fixedly installed between the bottom surface of the upper connecting plate 101 and the top surface of the lower support plate 103. A vibration damping rubber sleeve 106 is fixedly connected between the bottom surface of the upper connecting plate 101 and the top surface of the lower support plate 103, and both the vibration damping spring 104 and the damper 102 are located inside the vibration damping rubber sleeve 106.

[0029] The damping spring 104 converts the mechanical energy of vibration into the elastic potential energy of the damping spring 104. When the damping spring 104 moves due to vibration, the silicone oil inside the damper 102 will flow in the gap between the piston and the cylinder, generating viscous resistance. This resistance will consume the elastic potential energy of the damping spring 104, preventing it from continuously amplifying the vibration. The high internal friction characteristics of the damping rubber sleeve 106, which is made of nitrile rubber, cause friction between molecular chains when it is squeezed or sheared, converting vibration energy into heat energy, thereby effectively damping the reactor 1 and reducing the noise generated by vibration.

[0030] The outer surface of the vibration damping rubber sleeve 106 is provided with multiple ventilation holes 1061. A dustproof net 1062 is fixedly installed inside the ventilation holes 1061. The ventilation holes 1061 allow hot air inside the vibration damping component to flow to the outside, avoiding heat accumulation that could cause the vibration damping rubber sleeve 106 to age. The dustproof net 1062 can intercept dust, insects and other particles in the air, preventing them from entering the vibration damping component and impacting the metal parts, thus reducing the generation of secondary noise.

[0031] The working principle of this utility model is as follows: When the reactor 1 is running, local areas will form particle clusters due to uneven gas distribution or differences in particle size. The violent collision between the particle clusters and the reactor wall and between the particle clusters will generate mechanical noise. When external equipment such as fans and compressors are running, they will generate vibrations that are transmitted to the reactor 1, causing structural vibration noise.

[0032] The sound-absorbing layer 204 dissipates mid-to-high frequency sound energy into heat energy through the viscous resistance and inertial collision of the porous material. The sound insulation layer 201 blocks the transmission of low-frequency sound waves through the mass law of the high-density metal plate. The vibration damping spring 104 converts the mechanical energy of vibration into the elastic potential energy of the vibration damping spring 104. The silicone oil inside the damper 102 flows in the gap between the piston and the cylinder, generating viscous resistance and consuming the elastic potential energy of the vibration damping spring 104. The high internal friction characteristics of the vibration damping rubber sleeve 106 cause friction between molecular chains when it is squeezed or sheared, converting vibration energy into heat energy, thereby effectively damping the reactor 1 and reducing the noise generated by vibration.

[0033] All of the above-mentioned components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0034] The electrical components mentioned above, such as reactor 1, are all electrically connected to the main controller and power supply. The main controller can be controlled by a computer or other devices.

[0035] Commonly known devices and existing publicly available power connection technologies will not be described in detail here.

[0036] The specific model and specifications of components such as damper 102 and vibration damping spring 104 proposed in this application need to be selected and determined according to the actual specifications of the device. The specific selection calculation method and connection method all adopt the existing technology in this field, so they will not be described in detail here.

[0037] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art, and the power supply is also common knowledge in the art.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fluidized bed reactor for the production of single-walled carbon nanotubes, comprising a reactor (1) for producing single-walled carbon nanotubes, characterized in that: The outer surface of the reactor (1) is provided with multiple sound insulation panels (2), each sound insulation panel (2) includes a sound insulation layer (201), and one side of the sound insulation layer (201) is provided with a sound absorption layer (204) that contacts the outer wall of the reactor (1). The bottom surface of the reactor (1) is provided with four vibration damping components.

2. A fluidized bed reactor for the production of single-walled carbon nanotubes according to claim 1, characterized in that: The sound insulation layer (201) has four connection holes (202) on one side and four first mounting holes (203) on one side. Both the sound insulation layer (201) and the sound absorption layer (204) have multiple ventilation holes (205) on one side.

3. A fluidized bed reactor for the production of single-walled carbon nanotubes according to claim 2, characterized in that: The sound-absorbing layer (204) has four second mounting holes (2041) on one side, and the four second mounting holes (2041) correspond one-to-one with the four first mounting holes (203). The sound-absorbing layer (204) has four embedding grooves (2043) on one side, and each of the four embedding grooves (2043) has a fixing hole (2042) inside.

4. A fluidized bed reactor for the production of single-walled carbon nanotubes according to claim 1, characterized in that: The vibration damping assembly includes a lower support plate (103) and an upper connecting plate (101) fixedly connected to the bottom surface of the reactor (1). A damping spring (104) is fixedly connected between the bottom surface of the upper connecting plate (101) and the top surface of the lower support plate (103). A telescopic rod (105) is fixedly connected between the bottom surface of the upper connecting plate (101) and the top surface of the lower support plate (103), and the damping spring (104) is sleeved on the outer end of the telescopic rod (105). A damper (102) is fixedly installed between the bottom surface of the upper connecting plate (101) and the top surface of the lower support plate (103).

5. A fluidized bed reactor for the production of single-walled carbon nanotubes according to claim 4, characterized in that: A damping rubber sleeve (106) is fixedly connected between the bottom surface of the upper connecting plate (101) and the top surface of the lower support plate (103), and the damping spring (104) and the damper (102) are both located inside the damping rubber sleeve (106).

6. A fluidized bed reactor for the production of single-walled carbon nanotubes according to claim 5, characterized in that: The outer surface of the vibration damping rubber sleeve (106) is provided with a plurality of ventilation holes (1061), and a dustproof net (1062) is fixedly installed inside the ventilation holes (1061).

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