Chemical vapor infiltration reactor convenient for discharging residual gas

Abstract

The utility model discloses a chemical vapor infiltration reactor convenient for discharging residual gas. The chemical vapor infiltration reactor comprises a reactor body, the device comprises a device body, an outer sleeve and a driving part, the outer sleeve is fixedly connected to the bottom of the device body in an inserted mode, the end, located in the device body, of the outer sleeve is communicated with a fixing ring with a cavity, an inner sleeve is coaxially connected into the outer sleeve in an inserted mode, and the driving part is arranged in the inner sleeve. The distance between the dispersing part and the gas outlet pipe is changed, so that the nitrogen dispersing range is dynamically adjusted, nitrogen is more uniformly distributed in the device body, residual gas in the device body can be effectively brought out by the uniformly distributed nitrogen, the exhaust efficiency is greatly improved, the residual gas is prevented from being accumulated in the reactor, and a good condition is provided for reaction; the normal operation of the reactor and the stability of the reaction effect are ensured.

Description

Technical Field

[0001] This invention relates to the field of chemical vapor permeation technology, and more particularly to a chemical vapor permeation reactor that facilitates the discharge of residual gases. Background Technology

[0002] Chemical vapor infiltration (CVI) is a newly developed technology for preparing inorganic materials. It involves decomposing and condensing one or more hydrocarbon gaseous compounds at high temperatures, then depositing the carbon inside a porous medium to densify the material. Before starting the heating of the CVI reactor, pre-prepared granular microporous porous carbon support material is blown into the reaction chamber through the feed inlet at the top of the CVI reactor using nitrogen carrier gas. After the granular feeding is completed, nitrogen gas is introduced to remove residual gas in the reaction chamber and between the granules.

[0003] Existing reactors cannot dynamically adjust the nitrogen dispersion range according to demand. Inside the reactor, nitrogen cannot be evenly distributed, making it difficult for residual gas in some areas to be carried out, which will interfere with the normal progress of the reaction. Therefore, a chemical vapor permeation reactor that facilitates the discharge of residual gas is proposed to solve this problem. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0005] Chemical vapor permeation reactors that facilitate the removal of residual gases include:

[0006] body;

[0007] An outer sleeve is fixedly inserted into the bottom of the device body. One end of the outer sleeve inside the device body is connected to a fixing ring with a cavity. An inner sleeve is coaxially inserted into the outer sleeve. A driving component is installed inside the inner sleeve. Multiple sets of through holes for communication between the inner sleeve and the outer sleeve are opened on the inner sleeve below the driving component. Multiple sets of through hole units for communication between the inner sleeve and the outer sleeve are opened on the surface of the inner sleeve above the through holes. The top of the driving component passes through the fixing ring and extends into the fixing ring. A dispersing component is fixedly installed at one end of the driving component extending into the fixing ring. An air outlet pipe is connected to the fixing ring above the dispersing component.

[0008] The air intake pipe is fixedly inserted into the bottom of the inner sleeve.

[0009] As an improvement to the above technical solution, the driving component includes a piston that is slidably disposed inside the inner sleeve. A movable rod is fixedly disposed on the top of the piston. The top of the movable rod passes through the fixed ring and extends into the interior of the fixed ring. One end of the movable rod extending into the interior of the fixed ring is fixedly connected to the dispersing component. A spring is wound around the surface of the movable rod and at one end of the inner sleeve.

[0010] As an improvement to the above technical solution, the through-hole unit includes a plurality of through-holes two evenly distributed in the circumference, and the through-holes one are distributed in a ring array on the circumferential surface of the inner sleeve.

[0011] As an improvement to the above technical solution, the dispersing component has a bowl-shaped structure.

[0012] The beneficial effects of this utility model are:

[0013] By accumulating nitrogen and changing the gas pressure in the inner sleeve, the driving component moves the dispersing component upward, changing the distance between the dispersing component and the outlet pipe. This dynamically adjusts the nitrogen dispersion range, allowing the nitrogen to be distributed more evenly within the reactor. The evenly distributed nitrogen can effectively carry away residual gas from the reactor, greatly improving exhaust efficiency, preventing residual gas from accumulating in the reactor, providing favorable conditions for the reaction results, and ensuring the normal operation of the reactor and the stability of the reaction effect. Attached Figure Description

[0014] Figure 1 This is a front view of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the present invention with the dispersion component and the vent pipe in state one;

[0016] Figure 3 This is a schematic diagram of the structure of the dispersion component and the vent pipe in state two of this utility model.

[0017] Reference numerals: 10, body; 20, outer sleeve; 21, inner sleeve; 211, through hole one; 212, through hole two; 22, fixing ring; 23, vent pipe; 30, dispersing component; 31, moving rod; 32, piston; 33, spring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] Chemical vapor permeation reactors that facilitate the removal of residual gases include:

[0020] Body 10;

[0021] An outer sleeve 20 is fixedly inserted into the bottom of the device body 10. One end of the outer sleeve 20 located inside the device body 10 is connected to a fixing ring 22 with a cavity. An inner sleeve 21 is coaxially inserted into the outer sleeve 20. A driving component is provided inside the inner sleeve 21. Multiple sets of through holes 211 for communication between the inner sleeve 21 and the outer sleeve 20 are provided on the inner sleeve 21 and below the driving component. Multiple sets of through hole units for communication between the inner sleeve 21 and the outer sleeve 20 are provided on the surface of the inner sleeve 21 and above the through holes 211. The top of the driving component passes through the fixing ring 22 and extends into the fixing ring 22. A dispersing component 30 is fixedly provided at one end of the driving component extending into the fixing ring 22. An air outlet pipe 23 is connected to the fixing ring 22 and above the dispersing component 30.

[0022] The air intake pipe is fixedly inserted into the bottom of the inner sleeve 21.

[0023] Specifically, the inlet pipe of this device is specifically designed for introducing nitrogen gas and is independent of the reaction gas inlet (including cyclone) pipe. Nitrogen gas enters the inner sleeve 21 through the inlet pipe. Part of the nitrogen gas enters the outer sleeve 20 through the through-hole 211, while the remaining nitrogen gas accumulates inside the inner sleeve 21. As the accumulated nitrogen gas increases, the gas pressure gradually rises, driving the driving component to move upwards. The driving component then moves the dispersing component 30 upwards, changing the distance between the dispersing component 30 and the outlet pipe 23, thus entering state two. Figure 3Nitrogen gas inside the outer sleeve 20 enters the cavity inside the fixed ring 22, and is then transported by the fixed ring 22 to the outlet pipe 23. The outlet pipe 23 sprays nitrogen gas into the dispersion element 30, where it disperses along the inner side to the periphery and is discharged into the reactor body 10. Because the flow space in the dispersion element 30 increases, the gas flow rate decreases, and the pressure also decreases, effectively preventing the particulate microporous porous carbon support inside the reactor from being blown out. As the distance between the dispersion element 30 and the outlet pipe 23 increases, the dispersion range of the gas in the dispersion element also increases after the outlet pipe 23 sprays nitrogen gas into the dispersion element 30. This achieves dynamic adjustment of the nitrogen dispersion range, allowing the nitrogen gas to be more evenly distributed inside the reactor body 10, and effectively carrying away residual gas inside the reactor body 10. This improves exhaust efficiency and prevents residual gas from accumulating in the reactor, thus ensuring the normal operation of the reactor and the stability of the reaction results. When the drive unit moves, due to the uniform distribution of multiple through-hole units along the axial direction of the inner sleeve 21, as the multiple through-hole units gradually open, the nitrogen gas flow outlet increases, and the gas pressure inside the inner sleeve 21 decreases. Under the elastic force of the drive unit itself, the drive unit drives the dispersing unit 30 to move downwards, returning to state one. Nitrogen gas accumulates again in the inner sleeve 21, and the gas pressure increases, causing the drive unit to move upwards again. This cycle repeats itself. This cyclical movement ensures the continuous flow and uniform distribution of nitrogen gas in the reactor body 10, thereby continuously and efficiently discharging residual gas and maintaining a stable gas environment and good reaction conditions inside the reactor.

[0024] In one embodiment, the driving component includes a piston 32 slidably disposed inside the inner sleeve 21. A movable rod 31 is fixedly disposed on the top of the piston 32. The top of the movable rod 31 passes through the fixing ring 22 and extends into the interior of the fixing ring 22. One end of the movable rod 31 extending into the fixing ring 22 is fixedly connected to the dispersing member 30. A spring 33 is wound around the surface of the movable rod 31 and at a section located in the inner sleeve 21. When the air pressure inside the inner sleeve 21 rises to a level sufficient to overcome the elastic force of the spring 33, it will push the piston 32 to slide upward. The upward movement of the piston 32 will cause the movable rod 31 and the dispersing member 30 to move upward synchronously. The change in the position of the dispersing member 30 will increase the distance between it and the air outlet pipe 23. The changes alter the range and angle of nitrogen dispersion. During this process, spring 33 is compressed. When piston 32 moves upward above through hole 212, nitrogen in inner sleeve 21 can be discharged not only through through hole 1 211 but also through through hole 212. This increases the nitrogen flow outlet. Due to the increased outlet, the airflow pressure inside inner sleeve 21 decreases. At this point, the compressed spring 33 returns to its original state, releasing elastic potential energy and generating a downward elastic force, pushing piston 32 to drive moving rod 31 and dispersion component 30 downward. When piston 32 falls back to a certain extent, nitrogen in inner sleeve 21 will re-accumulate, and the gas pressure will rise again, driving piston 32 to move upward. This cycle repeats continuously.

[0025] In one embodiment, the through-hole unit includes a plurality of circumferentially distributed through-holes 212, and the through-holes 211 are arranged in a ring array on the circumferential surface of the inner sleeve 21. By setting two sets of ring arrays of through-holes 211 and through-holes 212 at different heights, more gas flow paths can be provided under different working conditions. This helps to improve the overall exhaust efficiency and reduce the possibility of gas stagnation. The uniformly distributed design reduces the risk of single-point failure. Even if a through-hole is blocked or damaged, other through-holes can still continue to work, ensuring the stable operation of the system.

[0026] In one embodiment, the dispersing element 30 has a bowl-shaped structure. The gas entering the dispersing element 30 was originally ejected from the gas outlet pipe 23. After passing through the bowl-shaped structure, the flow direction of the gas changes to disperse in all directions. This change in direction allows the gas to better cover the space inside the container 10. By dispersing the gas evenly, the possibility of nitrogen accumulating in certain areas inside the container 10 is reduced, further improving the efficiency of exhausting residual gas.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A chemical vapor permeation reactor that facilitates the removal of residual gases, characterized in that, include: body(10); An outer sleeve (20) is fixedly inserted into the bottom of the device body (10). One end of the outer sleeve (20) located inside the device body (10) is connected to a fixing ring (22) with a cavity. An inner sleeve (21) is coaxially inserted into the outer sleeve (20). A driving component is provided inside the inner sleeve (21). Multiple through holes (211) are provided on the inner sleeve (21) and below the driving component to allow communication between the inner sleeve (21) and the outer sleeve (20). The inner sleeve (21) has multiple sets of through hole units on its surface above the through hole (211) for communicating with the outer sleeve (20). The top of the driving member passes through the fixing ring (22) and extends into the inside of the fixing ring (22). A dispersing member (30) is fixedly provided at one end of the driving member that extends into the inside of the fixing ring (22). An air outlet pipe (23) is provided on the fixing ring (22) above the dispersing member (30). The air intake pipe is fixedly inserted into the bottom of the inner sleeve (21).

2. The chemical vapor permeation reactor according to claim 1, which facilitates the discharge of residual gas, is characterized in that: The driving component includes a piston (32) slidably disposed inside the inner sleeve (21). A movable rod (31) is fixedly disposed on the top of the piston (32). The top of the movable rod (31) passes through the fixed ring (22) and extends into the interior of the fixed ring (22). One end of the movable rod (31) extending into the interior of the fixed ring (22) is fixedly connected to the dispersing component (30). A spring (33) is wound around the surface of the movable rod (31) and a section located in the inner sleeve (21).

3. The chemical vapor permeation reactor according to claim 2, which facilitates the discharge of residual gas, is characterized in that: The through-hole unit includes a plurality of through-holes two (212) evenly distributed in the circumference, and the through-holes one (211) are distributed in a ring array on the circumferential surface of the inner sleeve (21).

4. The chemical vapor permeation reactor according to claim 1, which facilitates the discharge of residual gas, is characterized in that: The dispersion component (30) has a bowl-shaped structure.

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