A fixed-bed reactor for decomposing cyclohexyl hydrogen peroxide
By introducing a material buffer assembly and an alumina ceramic ball layer into the fixed-bed reactor, the service life problem caused by the rigid connection of the buffer assembly at the inlet end of the fixed-bed reactor was solved, and more efficient decomposition of cyclohexyl hydrogen peroxide and structural stability were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA PINGMEI SHENMA GRP NYLON TECH CO LTD
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-30
AI Technical Summary
The existing fixed-bed reactors used for decomposing cyclohexyl hydrogen peroxide have a rigid connection at the inlet buffer assembly, which leads to prolonged material scouring and reduces service life.
The material buffer assembly includes components such as guide rods, trays, buffer springs, and buffer discs. Through the elastic connection of the buffer springs, the buffer discs absorb the impact force by deformation when subjected to material scouring, thus extending their service life. Furthermore, the first and second alumina ceramic ball layers increase the gas and liquid distribution points, thereby improving decomposition efficiency.
This extended the service life of the buffer components, improved the decomposition efficiency of cyclohexyl hydrogen peroxide, and ensured the structural stability of the fixed-bed reactor and the support and protection of the catalyst.
Smart Images
Figure CN224422805U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of fixed-bed reactors, and in particular to a fixed-bed reactor for decomposing cyclohexyl hydrogen peroxide. Background Technology
[0002] Cyclohexyl hydrogen peroxide is an intermediate product of cyclohexane oxidation, typically decomposing into cyclohexanol and cyclohexanone, which are important raw materials for nylon production. Traditional decomposition methods may suffer from problems such as catalyst instability and low mass and heat transfer efficiency. Fixed-bed reactors, on the other hand, offer advantages such as continuous operation and catalyst fixation, which can improve efficiency and stability. However, existing fixed-bed reactors for decomposing cyclohexyl hydrogen peroxide still have areas for improvement during use. For example, the buffer components at the inlet of fixed-bed reactors are mostly rigidly connected, and their service life is greatly reduced due to prolonged material erosion. To address these issues, this application proposes a fixed-bed reactor for decomposing cyclohexyl hydrogen peroxide. Utility Model Content
[0003] In view of the above situation and to overcome the defects of the prior art, this utility model provides a fixed bed reactor for decomposing cyclohexyl hydrogen peroxide. The technical solution it solves is as follows: it includes a cylindrical body, characterized in that an upper end cover and a lower end cover are respectively flanged at the upper and lower ends of the cylindrical body, the upper end cover is coaxially fixedly connected to a feed pipe, a material buffer assembly corresponding to the feed pipe is installed on the inner wall of the upper end cover, and two sets of fixed bed assemblies arranged vertically at intervals are installed inside the cylindrical body.
[0004] The material buffer assembly includes two guide rods fixedly connected to the inner wall of the upper end cover and symmetrically arranged about the axis of the feed pipe. The lower end of each guide rod is coaxially fixedly connected to a tray. The lower end of each tray is coaxially fixedly connected to the lower end of a buffer spring. The upper end of each buffer spring is fixedly connected to an upper support ring that slides with the guide rod. The outer edge of each upper support ring is fixedly connected to two connecting blocks symmetrically arranged about its axis. The upper end of each connecting block is fixedly connected to the upper end of a connecting rod. The lower end of each connecting rod is jointly fixedly connected to a buffer disc facing the feed pipe.
[0005] Preferably, each of the fixed bed assemblies includes a material tray fixedly connected to the inner wall of the cylinder. The material tray has several evenly distributed material through holes. A first metal support mesh is fixedly connected to the upper end of the material tray. A first alumina ceramic ball layer is arranged above the first metal support mesh. A catalyst layer is arranged above the first alumina ceramic ball layer. A second metal support mesh fixedly connected to the inner wall of the cylinder is arranged above the catalyst. A second alumina ceramic ball layer is arranged above the second metal support mesh.
[0006] Preferably, the cylinder is fixedly connected to an exhaust pipe communicating with the bottom of the catalyst layer, and the cylinder is fixedly connected to an inlet pipe communicating with the top of the catalyst layer.
[0007] Preferably, the lower end cover is coaxially and fixedly connected to a discharge pipe.
[0008] The beneficial effects of this utility model are:
[0009] 1. When used, the fixed bed assembly of this application includes components such as a first alumina ceramic ball layer, a catalyst layer, and a second alumina ceramic ball layer. The first and second alumina ceramic ball layers increase the distribution points of gas and liquid, which facilitates the full decomposition of cyclohexyl hydrogen peroxide, and also provides support and protection for the catalyst.
[0010] 2. The material buffer assembly provided in this application can buffer the material from the feed pipe through the buffer plate, reduce its speed when entering the fixed bed assembly, ensure the structural stability of the relevant components, and thus ensure their service life; at the same time, the buffer plate is elastically connected to the bottom of the feed pipe through components such as connecting rod, upper support ring and buffer spring, which can greatly improve the bearing capacity of the buffer plate when it is subjected to material scouring, thereby ensuring the service life of the material buffer assembly. Attached Figure Description
[0011] Figure 1 This is a full sectional front view of the present invention.
[0012] Figure 2 This is an enlarged view of region A in the full sectional front view of this utility model.
[0013] Figure 3 This is an enlarged view of region B in the full sectional front view of this utility model.
[0014] Figure 4 This is a first-person perspective three-dimensional sectional view of the present invention.
[0015] Figure 5 This is a perspective view of the material buffer assembly of this utility model.
[0016] Figure 6 This is a second-view perspective stereoscopic view of the present invention.
[0017] Figure Labels
[0018] 1. Cylinder body, 2. Upper end cover, 3. Lower end cover, 4. Feed pipe, 5. Material buffer assembly, 6. Fixed bed assembly, 7. Guide rod, 8. Tray, 9. Buffer spring, 10. Upper support ring, 11. Connecting block, 12. Connecting rod, 13. Buffer plate, 14. Material tray, 15. Material through hole, 16. First metal support mesh, 17. First alumina ceramic ball layer, 18. Catalyst layer, 19. Second metal support mesh, 20. Second alumina ceramic ball layer, 21. Discharge pipe, 22. Feeding pipe, 23. Discharge pipe. Detailed Implementation
[0019] The following is in conjunction with the appendix Figure 1-6 The specific embodiments of this utility model will be described in further detail.
[0020] In Embodiment 1, the technical solution is as follows: When in use, the fixed bed assembly 6 includes components such as a first alumina ceramic ball layer 17, a catalyst layer 18, and a second alumina ceramic ball layer 20. The first alumina ceramic ball layer 17 and the second alumina ceramic ball layer 20 increase the distribution points of gas and liquid, facilitating the complete decomposition of cyclohexyl hydrogen peroxide, while also providing support and protection for the catalyst. The material buffer assembly 5 in this application can buffer the material from the feed pipe 4 through the buffer disc 13, reducing its entry speed into the fixed bed assembly 6, ensuring the structural stability of related components, and thus ensuring their service life. Simultaneously, the buffer disc 13 is elastically connected to the bottom of the feed pipe 4 through components such as the connecting rod 12, the upper support ring 10, and the buffer spring 9 on the tray 8. When the buffer disc 13 is subjected to material scouring, it can greatly improve the bearing capacity of the buffer disc 13, thereby ensuring the service life of the material buffer assembly 5.
[0021] In Example 2, based on Example 1, specifically, during use, the top of the upper cover 2 is coaxially connected to the feed pipe 4 to facilitate the entry of cyclohexyl hydrogen peroxide into the cylinder 1 for decomposition. To prevent excessive speed during entry into the cylinder 1 from impacting components such as the fixed bed assembly 6, a buffer plate is provided to buffer and reduce its speed. A connecting rod 12 and a buffer spring 9 are also provided to buffer the buffer plate, ensuring its service life. When the buffer plate is impacted by material from the feed pipe 4, the buffer plate moves downwards, which in turn drives the upper support ring 10 to move via the connecting rod 12 and connecting block 11. This causes the upper support ring 10 to slide relative to the guide rod 7. This relative sliding of the upper support ring 10 relative to the guide rod 7 acts on the buffer spring 9, causing the buffer spring 9 to deform accordingly. This converts the impact on the buffer plate into the potential energy of the buffer spring 9, thereby greatly reducing and weakening the impact on the buffer plate and ensuring its service life.
[0022] In Example 3, based on Example 2, during use, the catalyst can be added through the feed pipe, and when the catalyst needs to be replaced and regenerated, it can be discharged through the discharge pipe 21. A material tray 148 is arranged below the fixed bed assembly 6 to provide overall support. The material tray 148 also has material through holes 15 to facilitate the flow of reactants and products. The product can be discharged through the discharge pipe 23 at the lower end cover 3. The first metal support mesh 16 and the second metal support mesh 19, while providing support and protection for the catalyst, also have several evenly distributed mesh openings to facilitate the flow of reactants and products.
Claims
1. A fixed-bed reactor for decomposing cyclohexyl hydrogen peroxide, comprising a cylindrical body (1), characterized in that, The upper end cover (2) and the lower end cover (3) are respectively connected by flanges at the upper and lower ends of the cylinder (1). The upper end cover (2) is coaxially fixedly connected to the feed pipe (4). The inner wall of the upper end cover (2) is equipped with a material buffer assembly (5) corresponding to the feed pipe (4). Two sets of fixed bed assemblies (6) are installed in the cylinder (1) at intervals along the vertical direction. The material buffer assembly (5) includes two guide rods (7) that are fixedly connected to the inner wall of the upper end cover (2) and symmetrically arranged about the axis of the feed pipe (4). The lower end of each guide rod (7) is coaxially fixedly connected to a tray (8). The lower end of each tray (8) is coaxially fixedly connected to the lower end of a buffer spring (9). The upper end of each buffer spring (9) is fixedly connected to an upper support ring (10) that slides with the guide rod (7). The outer edge of each upper support ring (10) is fixedly connected to two connecting blocks (11) symmetrically arranged about its axis. The upper end of each connecting block (11) is fixedly connected to the upper end of a connecting rod (12). The lower end of each connecting rod (12) is fixedly connected to a buffer plate (13) facing the feed pipe (4).
2. The fixed-bed reactor for decomposing cyclohexyl hydrogen peroxide according to claim 1, characterized in that, Each of the fixed bed assemblies (6) includes a material tray (148) fixedly connected to the inner wall of the cylinder (1). The material tray (148) has several evenly distributed material through holes (15). A first metal support mesh (16) is fixedly connected to the upper end of the material tray (148). A first alumina ceramic ball layer (17) is arranged above the first metal support mesh (16). A catalyst layer (18) is arranged above the first alumina ceramic ball layer (17). A second metal support mesh (19) fixedly connected to the inner wall of the cylinder (1) is arranged above the catalyst. A second alumina ceramic ball layer (20) is arranged above the second metal support mesh (19).
3. The fixed-bed reactor for decomposing cyclohexyl hydrogen peroxide according to claim 1, characterized in that, The cylinder (1) is fixedly connected to an exhaust pipe (21) that communicates with the bottom of the catalyst layer (18), and the cylinder (1) is fixedly connected to an inlet pipe (22) that communicates with the top of the catalyst layer (18).
4. A fixed-bed reactor for decomposing cyclohexyl hydrogen peroxide according to claim 1, characterized in that, The lower end cover (3) is coaxially and fixedly connected to the discharge pipe (23).