Reaction furnace for producing carbon nanotubes

Abstract

The application discloses a kind of carbon nanotube production with reaction furnace, it is related to carbon nanotube production field, including for the gasification of catalyst is gasified gasification chamber and is arranged in the crucible of gasification chamber inside, the top of the gasification chamber is provided with feeding opening, the feeding opening position sliding seal is provided with transfer bucket, the transfer bucket is provided with blocking part on, the transfer bucket has the first position of feeding and the second position of adding catalyst to the inside of the crucible;When the transfer bucket is switched from the first position to the second position, the blocking part will block the feeding opening.The application provides a kind of carbon nanotube production with reaction furnace, in the process of switching position of transfer bucket, blocking part will move to the position of feeding opening, and it is blocked, so that heat loss can be reduced.

Description

Technical Field

[0001] This invention relates to the field of carbon nanotube production, and more specifically to a reaction furnace for carbon nanotube production. Background Technology

[0002] As is widely known, carbon nanotubes, also known as buckytubes, are one-dimensional quantum materials with a unique structure. They can be classified into single-walled and multi-walled carbon nanotubes based on the number of graphene sheets; into armchair-shaped, zigzag, and chiral carbon nanotubes based on structural characteristics; and into oriented and non-oriented carbon nanotubes based on orientation. The preparation of carbon nanotubes requires the addition of a catalyst to the reactor. To improve the effectiveness of the catalyst, it needs to be gasified.

[0003] For example, the Chinese patent document with authorization announcement number CN111020747B, announcement date June 24, 2022, entitled "System and Method for Continuous Preparation of Carbon Nanotube Fibers Based on Floating Catalytic CVD Method," includes a gasification sample introduction device, a synthesis reaction device, and a fiber winding and collecting device. The gasification sample introduction device includes a gasification chamber and a first heating device, the first heating device being used to heat the gasification chamber. The gasification chamber has a carbon source injection port and a first carrier gas input port. The system provided by this invention can pre-vaporize liquid carbon source / catalyst into a gaseous state and can precisely control the liquid carbon source / catalyst supply rate, gasification temperature, carrier gas flow rate, and delivery pipeline temperature. This ensures that the gaseous carbon source / catalyst and carrier gas are fully and uniformly mixed before entering the reaction zone of the synthesis reaction device, thereby providing a precisely controllable, uniform, stable, and continuous gaseous carbon source supply for the subsequent carbon nanotube growth, thus achieving the continuous preparation of uniform carbon nanotube fibers.

[0004] The shortcoming of the existing technology is that during the catalyst gasification process, the catalyst will be continuously reduced, so it is necessary to continuously add catalyst to the gasification chamber. This requires the gasification chamber to be opened and closed frequently, which obviously causes heat loss. Summary of the Invention

[0005] The purpose of this invention is to provide a reactor for the production of carbon nanotubes to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A reactor for producing carbon nanotubes includes a gasification chamber for gasifying a catalyst and a crucible disposed inside the gasification chamber. A feeding port is provided at the top of the gasification chamber, and a transfer barrel is slidably sealed at the feeding port. A sealing part is provided on the transfer barrel, and the transfer barrel has a first position for feeding and a second position for adding catalyst into the crucible.

[0008] When the transfer barrel switches from the first position to the second position, the sealing part blocks the feeding port.

[0009] In the aforementioned reaction furnace for producing carbon nanotubes, the bottom of the transfer tank is provided with an outlet, and a first sealing plate is provided on the outlet;

[0010] It also includes a power assembly for driving the first sealing plate to seal and open the outlet.

[0011] The aforementioned reactor for producing carbon nanotubes has an inclined surface inside the transfer tank.

[0012] The aforementioned reactor for producing carbon nanotubes includes a power assembly comprising a mounting frame fixed to the transfer tank and a gear rotatably mounted on the mounting frame. A lifting ring is fitted around the transfer tank, and a first toothed plate is provided on the lifting ring. A protrusion is provided on the gasification chamber, and a second toothed plate is provided inside the protrusion. The gear meshes with both the first toothed plate and the second toothed plate simultaneously. A connecting rod is provided between the first sealing plate and the lifting ring.

[0013] The aforementioned reactor for producing carbon nanotubes includes a locking assembly on the mounting frame for controlling the working state of the gears.

[0014] In the aforementioned reactor for producing carbon nanotubes, the locking assembly includes a locking rod elastically disposed on the mounting frame, an abutment block disposed on the locking rod, an abutment rod disposed on the second toothed plate, and the abutment rod being located on the movement stroke of the abutment block.

[0015] The aforementioned reactor for producing carbon nanotubes includes a lifting ring comprising a first section and a second section rotatably connected to each other. A transmission rod is provided on the second section, and a transmission groove is provided on the transfer barrel. The transmission rod is rotatably connected to the transmission groove.

[0016] In the aforementioned reactor for producing carbon nanotubes, the first sealing plate is provided with auxiliary components for reducing the amount of catalyst residue.

[0017] The aforementioned reactor for producing carbon nanotubes has an opening on the protruding part.

[0018] The aforementioned reactor for producing carbon nanotubes has a communication port on the gasification chamber, and an inductive heating device is installed inside the communication port.

[0019] In the above technical solution, the present invention provides a reactor for the production of carbon nanotubes. When adding catalyst to the gasification chamber, the transfer tank is first placed in the first position, at which time the opening of the transfer tank is placed outside the gasification chamber, so that the catalyst can be directly added to the inside of the transfer tank. Then the transfer tank is switched from the first position to the second position, at which time the transfer tank is placed above the crucible, and the catalyst inside the transfer tank is poured into the crucible to realize the addition of catalyst. During the process of switching the position of the transfer tank, the sealing part will move to the position of the feeding port and seal it, thereby reducing the loss of heat. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall external structure provided in an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional structural diagram provided for an embodiment of the present invention;

[0023] Figure 3 This is a partial cross-sectional view of the structure provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the connection structure between the locking rod and the abutment block provided in an embodiment of the present invention;

[0025] Figure 5 This is a cross-sectional view of the transfer barrel and lifting ring provided in another embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of the gasification chamber provided in another embodiment of the present invention;

[0027] Figure 7 An exploded view of the transfer barrel and lifting ring provided in another embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the internal structure of the gasification chamber provided in another embodiment of the present invention;

[0029] Figure 9 This is a partial cross-sectional structural schematic diagram provided in another embodiment of the present invention;

[0030] Figure 10 for Figure 1 A schematic diagram of the partial structure at point A in the middle.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Gasification chamber; 2. Crucible; 3. Feeding port; 4. Transfer tank; 5. Sealing part; 6. Outlet; 7. First sealing plate; 8. Gear; 9. Lifting ring; 901. First section; 902. Second section; 10. First toothed plate; 11. Protrusion; 12. Second toothed plate; 13. Mounting bracket; 14. Connecting rod; 15. Protruding ring; 16. Locking rod; 17. Abutment block; 18. Abutment rod; 19. Rotating shaft; 20. Locking hole; 21. First spring; 22. Transmission rod; 23. Transmission groove; 24. Auxiliary component; 25. Vertical rod; 26. Dispersing rod; 27. Horizontal rod; 28. Scraper ring; 29. ​​Connecting port; 30. Secondary sealing part; 31. Second sealing plate; 32. Air inlet; 33. Air outlet; 34. Sliding part; 35. Second spring; 36. Sliding groove. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] In the description of this invention, it should be understood that, Figure 2 The position of the central sealing part 5 relative to the transfer barrel 4 is upper, and vice versa. The terms "center", "longitudinal", "lateral", "length", "width", "degree", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and other indications of orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to 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 of the present invention.

[0035] Reference Figure 1-10 The present invention provides a reactor for producing carbon nanotubes, including a gasification chamber 1 for gasifying a catalyst and a crucible 2 disposed inside the gasification chamber 1. A feeding port 3 is provided at the top of the gasification chamber 1, and a transfer tank 4 is slidably sealed at the feeding port 3. A sealing part 5 is provided on the transfer tank 4. The transfer tank 4 has a first position for feeding and a second position for adding catalyst into the crucible 2.

[0036] When the transfer barrel 4 switches from the first position to the second position, the sealing part 5 seals the feeding port 3.

[0037] Specifically, the reactor includes a catalyst gasification zone and a reaction zone connected to the catalyst gasification zone. The gasification chamber 1 is made of quartz material and includes a cylindrical base and a cover plate on top of the base. The cover plate has an inlet 32 ​​and an outlet 33. The crucible 2 is placed in the center of the gasification chamber 1 and is heated by a heating device. The catalyst can be an organometallic material, such as ferrocene or iron carbonyl particles. During catalyst gasification, the catalyst is placed in the crucible 2 and heated by the heating device, thereby raising the temperature of the catalyst inside the crucible 2 and causing it to gasify. At the same time, a carrier gas (nitrogen or argon) is introduced through the inlet 32, which carries the gasified catalyst into the reaction zone. A hydrocarbon gas is introduced into the reaction zone as a carbon source, forming single-walled carbon nanotubes in the reaction zone. This is existing technology and will not be elaborated further. One of the core innovations of this embodiment is that a feeding port 3 is provided in the center of the top of the cover plate, and a lifting mechanism is provided at the feeding port 3. The transfer barrel 4 has a sealing part 5 above it. Two vertical rods are provided between the sealing part 5 and the transfer barrel 4, and there is a gap between the two vertical rods for catalyst feeding. The first position, that is, the transfer barrel 4 is at the same height as the cover plate, so as to seal the feeding port 3. The second position, that is, the transfer barrel 4 is placed inside the base and above the crucible 2. The purpose of this arrangement is that when adding catalyst into the crucible 2, the transfer barrel 4 is first placed in the first position. At this time, the opening of the transfer barrel 4 is outside the gasification chamber 1, so the catalyst can be directly added into the transfer barrel 4. Then, the transfer barrel 4 is switched from the first position to the second position by existing reciprocating drive components such as cylinders. At this time, the transfer barrel 4 is placed above the crucible 2. The catalyst inside the transfer barrel 4 can be poured into the crucible 2 by the motor controlling the transfer barrel 4 to flip. During the switching of the transfer barrel 4, the sealing part 5 will move to the feeding port 3 and seal it, thereby reducing heat loss.

[0038] As an alternative to the aforementioned method of flipping the transfer tank 4 to dispose of the catalyst, preferably, the transfer tank 4 has an outlet 6 at its bottom, and a first sealing plate 7 is provided on the outlet 6; it also includes a power component for driving the first sealing plate 7 to seal and open the outlet 6. Specifically, the outlet 6 is coaxially arranged with the transfer tank 4, and the first sealing plate 7 is preferably of an inverted conical shape, with its radial dimension larger than that of the outlet 6. The power component can be an existing reciprocating drive component such as an electric push rod. The purpose of this arrangement is that when the transfer tank 4 is in the first position, the end of the first sealing plate 7 is inserted into the outlet 6, and its outer edge is in contact with the outlet 6 to seal the outlet 6. At this time, the catalyst can be added to the transfer tank 4, and the catalyst will not leak from the outlet 6. When the transfer tank 4 moves to the second position, the power component controls the first sealing plate 7 to move downward, thereby moving the first sealing plate 7 away from the outlet 6, thus opening the outlet 6 to allow the addition of the catalyst.

[0039] Preferably, the transfer tank 4 has an inclined surface inside. This inclined surface makes the internal structure of the transfer tank 4 approximately funnel-shaped, thereby minimizing catalyst residue inside the transfer tank 4.

[0040] As an alternative to the above-mentioned electric push rod controlling the movement of the first sealing plate 7, preferably, the power assembly includes a mounting bracket 13 fixed to the transfer barrel 4 and a gear 8 rotatably mounted on the mounting bracket 13. A lifting ring 9 is sleeved on the outside of the transfer barrel 4. A first toothed plate 10 is provided on the lifting ring 9. A protrusion 11 is provided on the gasification chamber 1. A second toothed plate 12 is provided inside the protrusion 11. The gear 8 meshes with both the first toothed plate 10 and the second toothed plate 12. A connecting rod 14 is provided between the first sealing plate 7 and the lifting ring 9. Specifically, a limiting structure is provided between the lifting ring 9 and the transfer barrel 4 to prevent relative rotation between the two. The first toothed plate 10 is fixed to the top of the lifting ring 9. The protrusion 11 is a cylindrical structure located above the feeding port 3. The second toothed plate 12 is vertically arranged on the inner circumferential surface of the protrusion 11. The gear 8 is rotatably mounted between the first toothed plate 10 and the second toothed plate 12 via the mounting bracket 13. There are two sets of power components, which are symmetrically arranged about the transfer barrel 4. The connecting rod 14 is L-shaped and includes... The system consists of a vertical section and a horizontal section. The top of the vertical section is fixedly connected to the lower surface of the lifting ring 9, and the end of the horizontal section is fixedly connected to the first sealing plate 7. The lifting ring 9 has a protruding ring 15 on its exterior that matches the feeding port 3. The transfer tank 4 is slidably sealed to the feeding port 3 via the protruding ring 15. This design ensures that when the transfer tank 4 is in the first position, the protruding ring 15 seals the feeding port 3 to prevent gas leakage. When the transfer tank 4 switches from the first position to the second position, it will drive the gear... The gear 8 and the first toothed plate 10 move down synchronously. Since the gear 8 meshes with the second toothed plate 12 and the second toothed plate 12 is fixed to the protrusion 11, the gear 8 will rotate during its downward movement. Also, since the gear 8 meshes with the first toothed plate 10, the first toothed plate 10 will move down further, that is, the distance the first toothed plate 10 moves down is twice the distance the gear 8 moves down. The distance the gear 8 moves down is the distance the transfer tank 4 moves down, and the distance the first toothed plate 10 moves down is the distance the first sealing plate 7 moves down. In this way, during the downward movement of the transfer tank 4, the first sealing plate 7 is passively moved away from the outlet 6. That is, during the process of the transfer tank 4 switching from the first position to the second position, the outlet 6 will be passively opened to achieve passive addition of catalyst. Conversely, when the catalyst is added, the transfer tank 4 is controlled to move up to the first position. During this process, the first sealing plate 7 will be moved up twice the distance to passively seal the outlet 6.

[0041] It should be noted that, in order to avoid the catalyst in the transfer tank 4 from being heated and melted as much as possible, the transfer tank 4 is at a certain distance from the crucible 2 in the first position. The drawback of the above-mentioned method of opening the outlet 6 is that the outlet 6 will be opened when the transfer tank 4 just begins to move down, that is, the outlet 6 will be opened when it is far away from the crucible 2, which will easily cause the catalyst to scatter outside the crucible 2, resulting in catalyst waste. To solve the above problem, the mounting frame 13 is further provided with a locking component for controlling the working state of the gear 8. Specifically, the locking component can be a pin and pin hole structure, used to lock the gear 8 so that the gear 8 cannot rotate. The purpose of this setting is that when the transfer barrel 4 is in the first position, the locking component locks the gear 8 so that the gear 8 cannot rotate. At this time, the gear 8 is above the second toothed plate 12, that is, the gear 8 is not engaged with the second toothed plate 12. Therefore, during the initial downward movement of the transfer barrel 4, the lifting ring 9 and the transfer barrel 4 cannot move relative to each other, so that the outlet 6 cannot be opened, thereby avoiding the waste of catalyst. When the transfer barrel 4 is about to move to the second position, the gear 8 descends to the position where it engages with the second toothed plate 12, and at the same time, the locking effect of the locking component is released. At this time, the gear 8 is in a rotatable state. During the subsequent downward movement of the transfer barrel 4, the first sealing plate 7 will move down a greater distance to passively open the outlet 6.

[0042] Preferably, the locking assembly includes a locking rod 16 elastically disposed on the mounting bracket 13, an abutment block 17 disposed on the locking rod 16, and an abutment rod 18 disposed on the second toothed plate 12, the abutment rod 18 being located on the movement stroke of the abutment block 17. Specifically, gear 8 is provided with a rotating shaft 19, and a locking hole 20 is provided radially on the rotating shaft 19. The locking rod 16 is slidably disposed on the mounting bracket 13 and is also arranged radially along the rotating shaft 19. The abutment block 17 is disposed at the end of the locking rod 16 away from the rotating shaft 19, and a wedge-shaped surface is provided inside it. The abutment rod 18 is vertically arranged on the side of the second gear plate 12, and the top end of the abutment rod 18 is located on the movement stroke of the wedge-shaped surface of the abutment block 17. An elastic setting, that is, a first spring 21 is provided between the abutment block 17 and the mounting bracket 13, and a limiting structure is provided between the locking rod 16 and the mounting bracket 13 to prevent the locking rod 16 from rotating on its own. The purpose of this arrangement is that when the intermediate transfer barrel 4 is in the first position, the end of the locking rod 16 and the locking hole 20 are locked. The gear 8 is locked so that it cannot rotate. When the transfer tank 4 is about to reach the second position, that is, the position where the catalyst is added, the wedge-shaped surface of the abutment block 17 will abut against the top of the abutment rod 18, thereby driving the abutment block 17 and the locking rod 16 to slide away from the locking hole 20 and store force on the first spring 21. When the end of the locking rod 16 is pulled out from the locking hole 20, the gear 8 is passively unlocked. At this time, the gear 8 descends to the position of the second toothed plate 12 and meshes with the second toothed plate 12. During the subsequent descent of the transfer tank 4, the gear 8 will drive the first sealing plate 7 to move down twice the distance to open the outlet 6. After the catalyst is added, the transfer tank 4 is controlled to move upward. The first sealing plate 7 moves up twice the distance, thus blocking the outlet 6. During the subsequent upward movement of the transfer barrel 4, the abutment block 17 and the abutment rod 18 will move away from each other. At this time, the elastic force of the first spring 21 is released, so that the locking rod 16 is inserted into the locking hole 20 again to passively lock the gear 8.

[0043] It should be noted that after the catalyst falls from outlet 6, it cannot be placed flat inside crucible 2. To solve this problem, as another embodiment of the present invention, preferably, the lifting ring 9 includes a first segment 901 and a second segment 902 rotatably connected to each other. A transmission rod 22 is provided on the second segment 902, and a transmission groove 23 is provided on the transfer barrel 4. The transmission rod 22 is rotatably connected to the transmission groove 23. Specifically, the first segment 901 is located above the second segment 902, and a limit ring or other structure is provided between them to prevent them from separating. The first toothed plate 10 is fixed above the first segment 901, and the connecting rod 14 is fixed to the bottom of the second segment 902. Preferably, there are six connecting rods 14, which are arranged in an array about the transfer barrel 4. The transfer barrel 4, the first sealing plate 7, and the connecting rods 14 are preferably made of high-temperature resistant alloy material. The transmission groove 23 is opened on the outer circumferential surface of the transfer barrel 4 and is arranged obliquely along the outer circumferential surface of the second segment 902 (e.g., Figure 7 As shown, the transmission rod 22 is fixed to the inner circumferential surface of the second section 902, and two sets of transmission rod 22 and transmission groove 23 are respectively provided. The radial dimension of the crucible 2 is larger than the radial dimension of the transfer barrel 4. The purpose of this arrangement is that when the transfer barrel 4 is in the second position, the lifting ring 9 will move downward relative to the transfer barrel 4. During this process, the transmission rod 22 will slide along the transmission groove 23. Since the transmission groove 23 is inclined, the second section 902 will move downward and rotate at the same time. During the descent of the second section 902, the horizontal section of the connecting rod 14 will be inserted into the crucible 2 and play a passive spreading role on the catalyst in the crucible 2, so that the catalyst in the crucible 2 is as flat as possible to facilitate the subsequent gasification process. When the lifting ring 9 moves upward relative to the transfer barrel 4, it will drive the second section 902 and the connecting rod 14 to rotate in the opposite direction to spread the catalyst in the crucible 2 a second time.

[0044] Furthermore, the first sealing plate 7 is provided with an auxiliary component 24 for reducing the amount of catalyst residue. Specifically, the auxiliary component 24 includes a vertical rod 25 fixed to the top of the first sealing plate 7. A dispersing rod 26 and a horizontal rod 27 are fixed to the outer circumference of the vertical rod 25. The horizontal rod 27 is positioned above the dispersing rod 26, which is placed in the catalyst in the transfer tank 4. A scraper ring 28 is provided on the outer edge of the horizontal rod 27. The scraper ring 28 is in contact with the inner wall of the transfer tank 4. The purpose of this arrangement is that when the lifting ring 9 moves downward relative to the transfer tank 4, the second section 902, the first sealing plate 7, and the vertical rod 25 will move downward and rotate. During the rotation of the vertical rod 25, the dispersing rod 26 will rotate, thereby dispersing the catalyst in the transfer tank 4 to prevent catalyst caking and facilitate the falling of the catalyst. During the downward movement of the vertical rod 25, the scraper ring 28 will move downward along the inner wall of the transfer tank 4, thereby passively scraping off the catalyst adhering to the inner wall of the transfer tank 4 to reduce the amount of catalyst residue.

[0045] Preferably, the protrusion 11 is provided with an opening. The opening, that is, the inner edge of the protrusion 11 is provided with a slope, so as to facilitate the protruding ring 15 and the sealing part 5 to enter the protrusion 11.

[0046] Furthermore, the gasification chamber 1 is provided with a connecting port 29, and an inductive heating device (not shown) is installed inside the connecting port 29. Specifically, the connecting port 29 is located on the side wall of the gasification chamber 1, and the inductive heating device is preferably an inductive heating rod, which has the advantages of fast heating speed and precise temperature control, so as to facilitate the heating of the catalyst. In addition, during the process of adding the catalyst, in order to avoid premature gasification of the catalyst, the inductive heating device can be turned off briefly, and then turned on again after the catalyst is replenished.

[0047] In another embodiment of the present invention, two secondary sealing parts 30 are slidably arranged on the gasification chamber 1, and a second sealing plate 31 is respectively arranged on the two secondary sealing parts 30. The air inlet 32 ​​and the air outlet 33 are respectively located on the movement stroke of the two second sealing plates 31. Specifically, the secondary sealing part 30 is approximately a semi-circular structure with an inclined surface inside. The radius of the secondary sealing part 30 is larger than the radius of the feeding port 3. A groove 36 is provided on the cover plate, and a sliding part 34 is provided on the secondary sealing part 30. The sliding part 34 is slidably connected to the groove 36, and a second spring 35 is provided between the sliding part 34 and the groove 36. A second sealing plate 31 is fixed to the end of the sliding part 34 away from the secondary sealing part 30, and the radial dimension of the second sealing plate 31 is larger than the radial dimensions of the air inlet 32 ​​and the air outlet 33. The purpose of this arrangement is that when the transfer tank 4 is in the first position, under the elastic force of the second spring 35, the two secondary sealing parts 30 are brought into contact with each other to seal the space below the feeding port 3, thereby achieving a secondary sealing effect on the feeding port 3 (the sliding seal between the convex ring 15 and the inner wall of the protrusion 11 is the primary seal of the feeding port 3), thus improving the sealing effect at the feeding port 3 position. During the process of switching the transfer tank 4 from the first position to the second position, the bottom of the transfer tank 4 will abut against the inclined surface inside the secondary sealing part 30, thereby causing the two secondary sealing parts 30 to move away from each other to avoid each other and store force on the second spring 35. During the movement of the secondary sealing part 30, the sliding part 34 will drive the second sealing plate 31 to move synchronously, and the two second sealing plates 31 will move to the bottom of the air inlet 32 ​​and the air outlet 33 respectively, thereby sealing the air inlet 32 ​​and the air outlet 33 at the same time, so that the catalyst addition process will not be affected by the wind, and the catalyst can fall better. When the catalyst is added, the transfer tank 4 moves upward. When the transfer tank 4 is away from the secondary sealing part 30, the elasticity of the second spring 35 is released, so as to drive the secondary sealing part 30 and the second sealing plate 31 to move in opposite directions, thereby opening the air inlet 32 ​​and the air outlet 33 at the same time, so as to facilitate the entry of carrier gas.

[0048] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A reactor for producing carbon nanotubes, comprising a gasification chamber for gasifying a catalyst and a crucible disposed inside the gasification chamber, characterized in that, The gasification chamber is provided with a feeding port at the top, and a transfer barrel is provided with a sliding seal at the feeding port. The transfer barrel is provided with a sealing part. The transfer barrel has a first position for feeding and a second position for adding catalyst into the crucible. When the transfer barrel switches from the first position to the second position, the sealing part blocks the feeding port; The transfer barrel has an outlet at the bottom, and a first sealing plate is installed on the outlet; It also includes a power assembly for driving the first sealing plate to seal and open the outlet; The power assembly includes a mounting bracket fixed to the transfer barrel and a gear rotatably mounted on the mounting bracket. A lifting ring is sleeved on the outside of the transfer barrel. A first toothed plate is provided on the lifting ring. A protrusion is provided on the gasification chamber. A second toothed plate is provided inside the protrusion. The gear meshes with both the first toothed plate and the second toothed plate. A connecting rod is provided between the first sealing plate and the lifting ring.

2. The reactor for producing carbon nanotubes according to claim 1, characterized in that, The transfer barrel has an inclined surface inside.

3. The reactor for producing carbon nanotubes according to claim 1, characterized in that, The mounting bracket is equipped with a locking component for controlling the working state of the gear.

4. A reactor for producing carbon nanotubes according to claim 3, characterized in that, The locking assembly includes a locking rod elastically disposed on the mounting bracket, an abutment block disposed on the locking rod, an abutment rod disposed on the second toothed plate, and the abutment rod being located on the movement stroke of the abutment block.

5. A reactor for producing carbon nanotubes according to claim 1, characterized in that, The lifting ring includes a first section and a second section that are rotatably connected to each other. A transmission rod is provided on the second section. A transmission groove is provided on the transfer barrel. The transmission rod is rotatably connected to the transmission groove.

6. A reactor for producing carbon nanotubes according to claim 5, characterized in that, The first sealing plate is equipped with auxiliary components for reducing the amount of catalyst residue.

7. A reactor for producing carbon nanotubes according to claim 1, characterized in that, The protrusion has an opening.

8. A reactor for producing carbon nanotubes according to claim 1, characterized in that, The vaporization chamber is provided with a connecting port, and an inductive heating device is installed inside the connecting port.

Images