Catalyst recovery device for caprolactam production
By adopting a multi-layer stirring structure and a rotary tilting system in the caprolactam production unit, the problem of low catalyst recovery rate was solved, and efficient separation of catalyst and raw liquid was achieved, thereby improving production efficiency and resource utilization.
Patent Information
- Application Number
- CN202520367045.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-03-05
AI Technical Summary
In existing caprolactam production facilities, the catalyst recovery rate is low because the catalyst and the raw liquid are not mixed well, resulting in low separation efficiency.
The recovery reactor with a multi-layer stirring structure achieves multi-layer stirring through a stirring shaft driven by a first motor and a bevel gear system. Combined with a rotating shaft driven by a second motor and a gear system, the reactor can be rotated and tilted, enhancing the mixing and separation of the catalyst and the original liquid.
It improves catalyst recovery rate, reduces manual operation, reduces resource waste, and improves production efficiency.
Smart Images
Figure CN223800527U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to catalyst recovery technical field more specifically, the utility model relates to a kind of catalyst recovery device for caprolactam production. BACKGROUND
[0002] Caprolactam is an important raw material for manufacturing polyamide (especially nylon 6). Nylon 6 has excellent mechanical properties, wear resistance and chemical stability, and is an important material in the fields of textiles, automobiles, electronics, electrical and consumer products.
[0003] In the production process of caprolactam, catalyst is an indispensable key substance. However, during production, some catalysts may fail or remain due to various reasons. If these failed or remaining catalysts are not recovered, it will cause waste of resources. By recovering the catalyst in caprolactam production, it can be reused in the production process, thereby effectively saving resources.
[0004] Since the caprolactam finished product is in solid form, while the catalyst is usually in liquid form, separation is carried out by filtration. However, in the existing catalyst recovery device for caprolactam production, in order to promote the precipitation of the catalyst or change its surface properties, an acid-base regulator (calcium hydroxide) may be added to adjust the pH value of the solution. This adjustment helps the catalyst to precipitate from the reaction system, thereby facilitating subsequent solid-liquid separation. However, the existing reaction kettle has poor mixing effect on the added reagent and the catalyst with the caprolactam production stock solution, which results in low recovery rate of the catalyst. Therefore, it is necessary to improve and optimize the catalyst recovery device for caprolactam production. SUMMARY
[0005] In order to overcome the shortcomings of the prior art, the utility model provides a catalyst recovery device for caprolactam production, which has the advantages of using multi-layer stirring to fully stir the caprolactam production raw materials, catalyst and added reagent inside the recovery reaction kettle, so that the catalyst can be better separated from the stock solution, thereby increasing the recovery rate of the catalyst.
[0006] To achieve the above object, the utility model provides the following technical scheme: A catalyst recovery device for caprolactam production, including recovery reation kettle, the upper surface of recovery reation kettle is connected with T shape frame, the upper surface of T shape frame is fixedly installed with first motor, the output shaft of first motor is connected with stirring shaft, the upper end inner wall of recovery reation kettle is fixedly connected with fixed tube, the lower part of fixed tube is fixedly connected with protection shell, the middle part surface of stirring shaft is fixedly sleeved with first bevel gear, the inside rotation is connected with first rotation axis of protection shell, the surface of stirring shaft is rotatably connected with the inside of protection shell, one end of first rotation axis is fixedly connected with second bevel gear, second bevel gear and first bevel gear are engaged, the surface of first rotation axis is provided with first stirring structure, the surface of stirring shaft is provided with second stirring structure.
[0007] As a preferred technical scheme of the utility model: The outer wall of the recovery reaction kettle is fixedly connected with a fixed ring, the surface of the fixed ring is fixedly connected with a second shaft, the surface of the second shaft is rotatably connected with a Z-shaped support frame, the upper surface of the right Z-shaped support frame is provided with a driving structure, and the lower surface of the Z-shaped support frame is fixedly connected with a bottom plate.
[0008] As a preferred technical scheme of the utility model: The first stirring structure includes a first stirring rod fixedly connected to the surface of the first shaft, a second stirring rod fixedly connected to the surface of the first shaft, and a connecting stirring plate fixedly connected between the first stirring rod and the second stirring rod.
[0009] As a preferred technical scheme of the utility model: The second stirring structure includes a third stirring rod fixedly connected to the surface of the stirring shaft, and a stirring assembly fixedly connected to the lower end of the stirring shaft.
[0010] As a preferred technical scheme of the utility model: The driving structure includes a second motor fixedly connected to the upper surface of the Z-shaped support frame, a first gear fixedly connected to the output shaft of the second motor, a second gear fixedly sleeved on the surface of the right second shaft, and the second gear and the first gear are engaged with each other.
[0011] As a preferred technical scheme of the utility model: The front and rear surfaces of the Z-shaped support frame are fixedly connected with auxiliary frames, and the auxiliary frames and the bottom plate are fixedly connected through bolts.
[0012] As a preferred technical scheme of the utility model: The rear part of the recovery reaction kettle is fixedly connected with a discharge port, the upper surface of the recovery reaction kettle is fixedly connected with a feed port, the lower part of the recovery reaction kettle is fixedly connected with a valve pipeline, the inner wall of the recovery reaction kettle is fixedly connected with a filter plate, and the front surface of the recovery reaction kettle is provided with an observation port.
[0013] Compared with the prior art, the utility model has the advantages that:
[0014] 1、 the utility model discloses a T -shaped frame provides the support force for first motor to guarantee that first motor works and radiates heat well, and simultaneously owing to the rotation of the output shaft of first motor to drive the rotation of the stirring shaft, however owing to the second stirring structure of stirring shaft surface sets up, thereby the mixed solution in the recovery reaction kettle is stirred, and then owing to the rotation of the first bevel gear to drive the rotation of the second bevel gear, thereby the rotation of the first stirring structure is driven, and the device adopts multilayer stirring to make the recovery reaction kettle inside caprolactam production raw material, catalyst and the acid -base regulator of adding fully stirred, thereby making the catalyst can better separate with the stock solution, and then increase the recovery rate of catalyst.
[0015] 2、 the utility model discloses the rotation of first gear is driven owing to the starting of second motor, however owing to the intermeshing of first gear and second gear, and owing to the surface of second gear fixedly sleeved with second rotating shaft, thereby the rotation of second rotating shaft is driven, and the heat is fixedly connected with the surface of fixed ring owing to second rotating shaft, and the outer surface of recovery reaction kettle is fixedly connected with fixed ring, thereby driving recovery reaction kettle to rotate along second rotating shaft as the axle, thereby the caprolactam production raw material in the recovery reaction kettle is poured, and the device greatly reduces manpower, and it is very convenient to collect the caprolactam production raw material in the recovery reaction kettle, thereby being favorable for the extraction of subsequent caprolactam. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the structure schematic drawing of the utility model;
[0017] Figure 2 It is the first gear structure schematic drawing of the utility model;
[0018] Figure 3 It is the discharge port structure schematic drawing of the utility model;
[0019] Figure 4 It is the filter plate structure schematic drawing of the utility model;
[0020] Figure 5 It is the protective shell section structure schematic drawing of the utility model.
[0021] In the diagram: 1. Recycling reactor; 2. T-shaped frame; 3. First motor; 4. Stirring shaft; 5. Fixed pipe; 6. Protective shell; 7. First bevel gear; 8. First rotating shaft; 9. Second bevel gear; 10. Fixed ring; 11. Second rotating shaft; 12. Z-shaped support frame; 13. Base plate; 14. First stirring rod; 15. Second stirring rod; 16. Connecting stirring plate; 17. Third stirring rod; 18. Stirring assembly; 19. Second motor; 20. First gear; 21. Second gear; 22. Auxiliary frame; 23. Discharge port; 24. Inlet; 25. Valve pipe; 26. Filter plate; 27. Observation port. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] like Figures 1 to 5 As shown, this utility model provides a catalyst recovery device for caprolactam production, including a recovery reactor 1. A T-shaped frame 2 is fixedly connected to the upper surface of the recovery reactor 1. A first motor 3 is fixedly installed on the upper surface of the T-shaped frame 2. A stirring shaft 4 is fixedly connected to the output shaft of the first motor 3. A fixing pipe 5 is fixedly connected to the upper inner wall of the recovery reactor 1. A protective shell 6 is fixedly connected to the lower part of the fixing pipe 5. A first bevel gear 7 is fixedly sleeved on the middle surface of the stirring shaft 4. A first rotating shaft 8 is rotatably connected inside the protective shell 6. The surface of the stirring shaft 4 is rotatably connected to the inside of the protective shell 6. A second bevel gear 9 is fixedly connected to one end of the first rotating shaft 8. The second bevel gear 9 meshes with the first bevel gear 7. A first stirring structure is provided on the surface of the first rotating shaft 8, and a second stirring structure is provided on the surface of the stirring shaft 4.
[0024] When the workers feed the caprolactam production raw materials, catalyst, and calcium hydroxide into the recovery reactor 1 through the feed inlet 24, they then start the first motor 3. The rotation of the output shaft of the first motor 3 drives the rotation of the stirring shaft 4, which in turn drives the rotation of the first bevel gear 7. Since the fixed pipe 5 is fixedly connected to the inner surface of the upper end of the recovery reactor 1, and the protective shell 6 is fixedly connected to the lower surface of the fixed pipe 5, the meshing of the first bevel gear 7 and the second bevel gear 9 drives the rotation of the second bevel gear 9, which in turn drives the rotation of the first rotating shaft 8, thus causing the first stirring structure and the second stirring structure to rotate.
[0025] The outer wall of the recovery reaction kettle 1 is fixedly connected with a fixed ring 10, the surface of the fixed ring 10 is fixedly connected with a second rotating shaft 11, the surface of the second rotating shaft 11 is rotatably connected with a Z-shaped support frame 12, the upper surface of the right Z-shaped support frame 12 is provided with a driving structure, and the lower surface of the Z-shaped support frame 12 is fixedly connected with a bottom plate 13.
[0026] When the staff recovers the catalyst, the caprolactam production raw materials and calcium hydroxide are stored above the filter plate 26, at this time the second motor 19 is started, the rotation of the output shaft of the second motor 19 drives the rotation of the first gear 20, however, the first gear 20 and the second gear 21 are meshed with each other, thereby driving the second rotating shaft 11 to rotate inside the Z-shaped support frame 12, however, the fixed ring 10 is fixedly connected with the surface of the recovery reaction kettle 1, thereby making the recovery reaction kettle 1 rotate, and then the caprolactam production raw materials and calcium hydroxide are poured out from the discharge port 23 due to the action of gravity.
[0027] The first stirring structure includes a first stirring rod 14 fixedly connected to the surface of the first rotating shaft 8, the surface of the first rotating shaft 8 is fixedly connected with a second stirring rod 15, and the first stirring rod 14 and the second stirring rod 15 are fixedly connected with a connecting stirring plate 16.
[0028] The rotation of the first rotating shaft 8 drives the rotation of the first stirring rod 14 and the second stirring rod 15, and then the first stirring rod 14 and the second stirring rod 15 are fixedly connected with the connecting stirring plate 16, thereby stirring the mixed solution inside the recovery reaction kettle 1.
[0029] The second stirring structure includes a third stirring rod 17 fixedly connected to the surface of the stirring shaft 4, and the lower end of the stirring shaft 4 is fixedly connected with a stirring assembly 18.
[0030] The third stirring rod 17 is designed to stir the area that cannot be stirred by the first stirring structure, and the design of the inclined state of the stirring assembly 18 prevents the deposition of caprolactam production raw materials from causing the blockage of the filter plate 26.
[0031] The driving structure includes a second motor 19 fixedly connected to the upper surface of the Z-shaped support frame 12, the output shaft of the second motor 19 is fixedly connected with a first gear 20, the surface of the right second rotating shaft 11 is fixedly sleeved with a second gear 21, and the second gear 21 and the first gear 20 are meshed with each other.
[0032] The rotation of the output shaft of the second motor 19 drives the rotation of the first gear 20, and then the first gear 20 and the second gear 21 are meshed with each other, thereby enabling the second rotating shaft 11 to rotate inside the Z-shaped support frame 12, thereby realizing the pouring of the recovery reaction kettle 1.
[0033] The front and back surfaces of the Z-shaped support frame 12 are fixedly connected with auxiliary frames 22, and the auxiliary frames 22 are fixedly connected with the bottom plate 13 through bolts.
[0034] The Z-shaped support frame 12 is connected with the bottom plate 13 through the auxiliary frames 22, thereby improving the stability of the Z-shaped support frame 12.
[0035] The rear part of the recovery reaction kettle 1 is fixedly connected with a discharge port 23, the upper surface of the recovery reaction kettle 1 is fixedly connected with a feeding port 24, the lower part of the recovery reaction kettle 1 is fixedly connected with a valve pipeline 25, the inner wall of the recovery reaction kettle 1 is fixedly connected with a filter plate 26, and the front surface of the recovery reaction kettle 1 is provided with an observation port 27.
[0036] The caprolactam production raw materials and solid sodium hydroxide are poured through the discharge port 23, however, due to the design of the feeding port 24, the mixed solution can be injected into the inside of the recovery reaction kettle 1, thereby being beneficial to the recovery of the liquid catalyst, however, due to the design of the valve pipeline 25, the catalyst is discharged from the inside of the recovery reaction kettle 1, the caprolactam production raw materials and the catalyst are filtered and separated through the filter plate 26, however, due to the design of the observation port 27 being transparent material, the amount of the caprolactam production raw materials accumulated in the inside of the recovery reaction kettle 1 can be observed.
[0037] The working principle and use process of the utility model are as follows:
[0038] When the staff puts the caprolactam production raw materials, the catalyst and calcium hydroxide into the inside of the recovery reaction kettle 1 from the feeding port 24, then the first motor 3 is started, the rotation of the output shaft of the first motor 3 drives the rotation of the stirring shaft 4, then the rotation of the first bevel gear 7 is driven, however, the fixed pipe 5 is fixedly connected to the inner surface of the upper end of the recovery reaction kettle 1, and the protective shell 6 is fixedly connected to the lower surface of the fixed pipe 5, then the mutual meshing of the first bevel gear 7 and the second bevel gear 9 drives the rotation of the second bevel gear 9, further drives the rotation of the first rotating shaft 8, thereby driving the rotation of the first stirring structure and the second stirring structure.
[0039] When the staff recovers the catalyst, the caprolactam production raw materials and calcium hydroxide are saved above the filter plate 26, at this time, the second motor 19 is started, the rotation of the output shaft of the second motor 19 drives the rotation of the first gear 20, however, the mutual meshing of the first gear 20 and the second gear 21 drives the rotation of the second rotating shaft 11 in the inside of the Z-shaped support frame 12, however, the fixed ring 10 is fixedly connected to the surface of the recovery reaction kettle 1, thereby making the recovery reaction kettle 1 rotate, then the caprolactam production raw materials and calcium hydroxide are poured out from the discharge port 23 due to the gravity.
[0040] The rotation of the first rotating shaft 8 drives the rotation of the first stirring rod 14 and the second stirring rod 15, and then the first stirring rod 14 and the second stirring rod 15 are fixedly connected with the connecting stirring plate 16, so that the mixed solution in the recovery reaction kettle 1 is stirred.
[0041] The third stirring rod 17 is designed to stir the area that cannot be stirred by the first stirring structure, and the design of the inclined state of the stirring assembly 18 prevents the blockage of the filter plate 26 caused by the precipitation of caprolactam production raw materials.
[0042] The rotation of the output shaft of the second motor 19 drives the rotation of the first gear 20, and then the first gear 20 and the second gear 21 are meshed with each other, so that the second rotating shaft 11 can rotate in the Z-shaped support frame 12 to realize the pouring of the recovery reaction kettle 1.
[0043] The Z-shaped support frame 12 and the bottom plate 13 are connected by the auxiliary frame 22, so that the stability of the Z-shaped support frame 12 is improved, and the auxiliary frame 22 is triangular, which has the characteristic of being more stable.
[0044] The caprolactam production raw materials and solid sodium hydroxide are poured through the discharge port 23, but due to the design of the feed port 24, the mixed solution can be injected into the inside of the recovery reaction kettle 1, which is beneficial to the recovery of the liquid catalyst, and due to the design of the valve pipeline 25, the catalyst is discharged from the inside of the recovery reaction kettle 1, and the caprolactam production raw materials and the catalyst are filtered and separated through the filter plate 26, and due to the design of the observation port 27 which is made of transparent material, the amount of caprolactam production raw materials accumulated in the inside of the recovery reaction kettle 1 can be observed.
[0045] It should be noted that, in the present text, relational terms such as first and second and the like are used merely to distinguish one entity or action from another, without necessarily requiring or implying any actual such relationship or order between or among the entities or actions. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.
[0046] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A catalyst recovery device for caprolactam production, comprising a recovery reactor (1), characterized in that: The upper surface of the recovery reaction kettle (1) is fixedly connected with a T-shaped frame (2), a first motor (3) is fixedly installed on the upper surface of the T-shaped frame (2), the output shaft of the first motor (3) is fixedly connected with a stirring shaft (4), the upper end inner wall of the recovery reaction kettle (1) is fixedly connected with a fixed tube (5), the lower part of the fixed tube (5) is fixedly connected with a protective shell (6), the middle surface of the stirring shaft (4) is fixedly sleeved with a first bevel gear (7), the inside of the protective shell (6) is rotatably connected with a first rotating shaft (8), the surface of the stirring shaft (4) is rotatably connected with the inside of the protective shell (6), one end of the first rotating shaft (8) is fixedly connected with a second bevel gear (9), the second bevel gear (9) and the first bevel gear (7) are meshed with each other, the surface of the first rotating shaft (8) is provided with a first stirring structure, and the surface of the stirring shaft (4) is provided with a second stirring structure.
2. The catalyst recovery device for caprolactam production according to claim 1, characterized by: The outer wall of the recovery reaction kettle (1) is fixedly connected with a fixed ring (10), the surface of the fixed ring (10) is fixedly connected with a second rotating shaft (11), the surface of the second rotating shaft (11) is rotatably connected with a Z-shaped support frame (12), the upper surface of the right part of the Z-shaped support frame (12) is provided with a driving structure, and the lower surfaces of the Z-shaped support frames (12) are fixedly connected with bottom plates (13).
3. The catalyst recovery device for caprolactam production according to claim 1, characterized by: The first stirring structure comprises a first stirring rod (14) fixedly connected to the surface of the first rotating shaft (8), a second stirring rod (15) fixedly connected to the surface of the first rotating shaft (8), and a connecting stirring plate (16) fixedly connected between the first stirring rod (14) and the second stirring rod (15).
4. The catalyst recovery device for caprolactam production according to claim 1, characterized by: The second stirring structure comprises a third stirring rod (17) fixedly connected to the surface of the stirring shaft (4), and a stirring assembly (18) fixedly connected to the lower end of the stirring shaft (4).
5. The catalyst recovery device for caprolactam production according to claim 2, characterized by: The driving structure comprises a second motor (19) fixedly connected to the upper surface of the Z-shaped support frame (12), a first gear (20) fixedly connected to the output shaft of the second motor (19), a second gear (21) fixedly sleeved on the surface of the right part of the second rotating shaft (11), and the second gear (21) and the first gear (20) are meshed with each other.
6. The catalyst recovery device for caprolactam production according to claim 2, characterized by: The front and rear surfaces of the Z-shaped support frame (12) are fixedly connected with auxiliary frames (22), and the auxiliary frames (22) and the bottom plates (13) are fixedly connected through bolts.
7. The catalyst recovery device for caprolactam production according to claim 1, characterized by: The rear part of the recovery reaction kettle (1) is fixedly connected with a discharge port (23), the upper surface of the recovery reaction kettle (1) is fixedly connected with a feeding port (24), the lower part of the recovery reaction kettle (1) is fixedly connected with a valve pipeline (25), the inner wall of the recovery reaction kettle (1) is fixedly connected with a filter plate (26), and the front surface of the recovery reaction kettle (1) is provided with an observation port (27).