Catalytic hydrogenation continuous production device
By designing hydrogen reflux and dosing components, the problems of unreacted hydrogen emissions and discontinuous catalyst addition in the hydrogenation unit were solved, enabling continuous production of the hydrogenation reaction and improving hydrogen recovery rate and reaction stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-06
AI Technical Summary
Existing hydrogenation units suffer from problems such as direct emission of unreacted hydrogen, discontinuous catalyst addition, disruption of production continuity, and environmental issues.
A hydrogen reflux assembly is used to separate hydrogen and steam in the tail gas. A dosing assembly is used to achieve uniform and quantitative addition of the catalyst. Combined with a stirring assembly and pressure monitoring, continuous production of the hydrogenation reaction is achieved.
Improve hydrogen recovery rate, reduce raw material consumption, reduce tail gas emissions, ensure stable reaction rate, and achieve continuous production.
Smart Images
Figure CN223969974U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of hydrogenation equipment technology, specifically to a continuous catalytic hydrogenation production device. Background Technology
[0002] Hydrogen peroxide is an inorganic compound, a pale blue viscous liquid in its pure state, miscible with water in any proportion. Its aqueous solution, hydrogen peroxide solution, is a colorless, transparent, and strong oxidizing agent widely used for medical wound disinfection, environmental and food sterilization. Although hydrogen peroxide slowly decomposes into water and oxygen under normal conditions, this process is very slow. To accelerate the decomposition, catalysts such as manganese dioxide are usually added or short-wave radiation is used. In the production of hydrogen peroxide, the hydrogenation unit is crucial; it reacts specific starting materials with hydrogen gas in the presence of a catalyst, followed by oxidation to convert the reacted raw materials into hydrogen peroxide.
[0003] Patent CN214973870U discloses a hydrogenation device for hydrogen peroxide production, including a hydrogenation tank. A motor is mounted on the top of the inner side of the hydrogenation tank. A gear is fixed to the output shaft of the motor, meshing with a gear ring. The gear ring is fixed to the outer wall of the top of a rotating tube. Multiple stirring blades are fixed to the outer wall of the bottom of the rotating tube. The outer wall of the rotating tube is rotatably connected to a fixed plate via a bearing. The fixed plate is fixed inside the hydrogenation tank. A hydrogen pump is mounted on the outer wall of the hydrogenation tank. The inlet port of the hydrogen pump is connected to the hydrogen tank via a gas delivery pipe, and the outlet port of the hydrogen pump is connected to one end of a second gas delivery pipe. The other end of the second gas delivery pipe extends into the hydrogenation tank and connects to a distribution pipe. This device can increase the contact area between hydrogen and the solution, accelerate the hydrogenation reaction rate, thereby improving production efficiency. It can also achieve quantitative addition of catalyst, ensuring the smooth progress of the hydrogenation reaction.
[0004] When the above-mentioned hydrogenation device is in use, unreacted hydrogen is directly emitted with the tail gas, which not only increases production costs but also causes environmental pollution. Furthermore, the addition of catalyst during the production process is discontinuous, relying on mechanical structures for feeding, which makes it impossible to achieve quantitative feeding. In addition, the addition of catalyst requires frequent shutdowns, affecting the continuous production of the device. Therefore, we propose a continuous catalytic hydrogenation production device. Utility Model Content
[0005] To address the shortcomings of existing technologies, this invention provides a continuous catalytic hydrogenation production device. A hydrogen reflux assembly first separates the hydrogen in the reaction tail gas from the vapor in the product in stages, preventing the hydrogen from carrying moisture that could affect its purity. The treated hydrogen is then pressurized by a hydrogen compressor and returned to the hydrogen storage tank to mix with fresh hydrogen for reuse. A dosing assembly ensures uniform, quantitative, and uninterrupted addition of the catalyst without requiring shutdown. Furthermore, a pressure gauge at the top of the hydrogenation tank monitors the pressure in real time, enabling continuous production and solving the problems mentioned earlier.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a continuous catalytic hydrogenation production device, comprising a hydrogenation tank, a mounting frame on the front side of the hydrogenation tank, a hydrogen storage tank on the right side of the hydrogenation tank, a hydrogen pump between the hydrogenation tank and the hydrogen storage tank, an inlet pipe fixedly connected to the output end of the hydrogen storage tank, an inlet pipe fixedly connected to the input end of the hydrogen pump, a gas distribution pipe on the bottom side of the interior of the hydrogenation tank, an output end of the hydrogen pump fixedly connected to the input end of the gas distribution pipe via a pipe, a discharge port on the rear bottom side of the hydrogenation tank, an exhaust port on the front top side of the hydrogenation tank, a hydrogen reflux assembly mounted on the mounting frame, a dosing assembly mounted on the right top side of the hydrogenation tank, and a stirring assembly also mounted inside the hydrogenation tank.
[0007] Preferably, the hydrogen reflux assembly includes a condenser and a separator, which are respectively located at the top and middle of the mounting frame. The condenser has a cooling chamber and a collection chamber on its upper and lower sides, respectively. The inner wall of the cooling chamber is equipped with several semiconductor cooling chips, and a cooling coil is also provided inside the cooling chamber. The input end of the cooling coil is fixedly connected to an exhaust pipe, and the input end of the exhaust pipe is fixedly connected to an exhaust port. The output end of the cooling coil is fixedly connected to the collection chamber. A connecting pipe is fixedly connected to the top right side of the collection chamber. A drain outlet is provided on the bottom left side of both the condenser and the separator. A centrifugal separation mechanism is installed inside the separator.
[0008] Preferably, the centrifugal separation mechanism includes a centrifugal separation cylinder, which is rotatably installed between the upper and lower sides inside the separation barrel. Rotary joints are installed at both the top output end and the bottom input end of the centrifugal separation cylinder. The output end of the connecting pipe is fixedly connected to the rotary joint located on the bottom side, and a return pipe is fixedly connected to the rotary joint located on the top side. The output end of the return pipe is fixedly connected to a hydrogen compressor, and the output end of the hydrogen compressor is fixedly connected to an inlet pipe via a pipeline. A drive motor is fixedly installed on the top left side of the separation barrel, and a gear is fixedly connected to the output shaft end of the drive motor. A gear ring is fixedly fitted onto the top outer surface of the centrifugal separation cylinder, and the gear meshes with the gear ring.
[0009] Preferably, the dosing assembly includes a catalyst addition box, the bottom of which is fixedly connected to the hydrogenation tank. A rotating shaft is rotatably connected between the front and rear sides of the catalyst addition box. Several fixing plates are fixedly connected to the outer surface of the rotating shaft. A drive motor is fixedly installed on the rear side of the catalyst addition box, and the output shaft end of the drive motor is fixedly connected to the rear end of the rotating shaft.
[0010] Preferably, the stirring assembly includes a second drive motor, which is fixedly installed on the top of the hydrogenation tank. A rotating rod is rotatably installed on the top side inside the hydrogenation tank. The top end of the rotating rod is fixedly connected to the output shaft end of the second drive motor. Several stirring blades are fixedly connected to the outer surface of the rotating rod.
[0011] Preferably, a pressure gauge is installed on the top left side of the hydrogenation tank.
[0012] This invention provides a continuous catalytic hydrogenation production apparatus. Compared with the prior art, it has the following advantages:
[0013] 1. This catalytic hydrogenation continuous production device first separates the hydrogen in the reaction tail gas from the vapor in the product through a hydrogen reflux component, avoiding the hydrogen carrying moisture and affecting its purity. The treated hydrogen is then pressurized by a hydrogen compressor and returned to the hydrogen storage tank to mix with fresh hydrogen for recycling, thereby improving the hydrogen recovery rate, significantly reducing raw material consumption and tail gas emissions, and meeting environmental protection requirements.
[0014] 2. This catalytic hydrogenation continuous production device achieves uniform, quantitative, and uninterrupted addition of catalyst through a dosing component, eliminating the need for shutdown operation. Furthermore, the pressure gauge at the top of the hydrogenation tank monitors the pressure in real time and adjusts the hydrogen intake in a coordinated manner to maintain a constant reaction rate, ensuring stable reaction rate and achieving continuous production. Attached Figure Description
[0015] Figure 1 This is a front view structural diagram of the main body of this utility model;
[0016] Figure 2 This is a schematic diagram of the rear view of the main body structure of this utility model;
[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the hydrogenation tank of this utility model;
[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the condenser and separator of this utility model;
[0019] Figure 5 This utility model Figure 4 Enlarged schematic diagram of the structure at point A in the middle.
[0020] In the diagram: 1. Hydrogenation tank; 2. Hydrogen storage tank; 3. Mounting frame; 4. Condensation tank; 5. Separation tank; 6. Exhaust port; 7. Exhaust pipe; 8. Return pipe; 9. Hydrogen compressor; 10. Hydrogen pump; 11. Inlet pipe; 12. Outlet; 13. Catalyst addition box; 14. Drive motor one; 15. Drive motor two; 16. Rotating rod; 17. Stirring blade; 18. Rotating shaft; 19. Fixing plate; 20. Pressure gauge; 21. Gas distribution pipe; 22. Cooling chamber; 23. Collection chamber; 24. Cooling coil; 25. Semiconductor refrigeration chip; 26. Connecting pipe; 27. Drain outlet; 28. Centrifugal separator; 29. Drive motor three; 30. Gear; 31. Rotary joint; 32. Gear ring. Detailed Implementation
[0021] 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.
[0022] Please see Figure 1-5 This utility model provides a technical solution: a continuous catalytic hydrogenation production device, including a hydrogenation tank 1, a mounting frame 3 on the front side of the hydrogenation tank 1, a hydrogen storage tank 2 on the right side of the hydrogenation tank 1, a hydrogen pump 10 between the hydrogenation tank 1 and the hydrogen storage tank 2, an inlet pipe 11 fixedly connected to the output end of the hydrogen storage tank 2, and an inlet pipe 11 fixedly connected to the input end of the hydrogen pump 10, a gas distribution pipe 21 on the bottom side of the interior of the hydrogenation tank 1, an output end of the hydrogen pump 10 fixedly connected to the input end of the gas distribution pipe 21 through a pipe, a discharge port 12 on the rear bottom side of the hydrogenation tank 1, an exhaust port 6 on the front top side of the hydrogenation tank 1, a hydrogen reflux assembly installed on the mounting frame 3, a dosing assembly installed on the right side of the top of the hydrogenation tank 1, and a stirring assembly installed inside the hydrogenation tank 1.
[0023] In operation, this continuous catalytic hydrogenation production unit uses a hydrogen pump 10 to deliver hydrogen from the hydrogen storage tank 2 to the gas distribution pipe 21 inside the hydrogenation tank 1 via the inlet pipe 11. The gas distribution pipe 21 evenly disperses the hydrogen into the reaction liquid. The stirring assembly stirs the reaction liquid to promote the contact and reaction between the hydrogen and the raw materials. The exhaust gas produced by the reaction enters the hydrogen reflux assembly on the mounting frame 3 through the exhaust port 6. After separation and purification, the hydrogen returns to the inlet pipe 11 through the reflux path for recycling. The dosing assembly adds a quantitative amount of catalyst to the hydrogenation tank 1 to maintain the reaction activity. After the reaction is completed, the product is discharged through the outlet port 12. The entire process achieves hydrogen recycling and continuous production.
[0024] The hydrogen reflux assembly includes a condenser 4 and a separator 5, which are respectively located at the top and middle of the mounting frame 3. The condenser 4 has a cooling chamber 22 and a collection chamber 23 located on its upper and lower sides. The inner wall of the cooling chamber 22 is equipped with several semiconductor cooling chips 25, and a cooling coil 24 is also installed inside the cooling chamber 22. The input end of the cooling coil 24 is fixedly connected to an exhaust pipe 7, and the input end of the exhaust pipe 7 is fixedly connected to an exhaust port 6. The output end of the cooling coil 24 is fixedly connected to the collection chamber 23. A connecting pipe 26 is fixedly connected to the top right side of the collection chamber 23. A drain outlet 27 is opened on the bottom left side of both the condenser 4 and the separator 5. A centrifugal separation mechanism is installed inside the separator 5.
[0025] The centrifugal separation mechanism includes a centrifugal separation cylinder 28, which is rotatably installed between the upper and lower sides inside the separation barrel 5. Rotary joints 31 are installed at both the top output end and the bottom input end of the centrifugal separation cylinder 28. The output end of the connecting pipe 26 is fixedly connected to the rotary joint 31 located on the bottom side. A return pipe 8 is fixedly connected to the rotary joint 31 located on the top side. The output end of the return pipe 8 is fixedly connected to a hydrogen compressor 9. The output end of the hydrogen compressor 9 is fixedly connected to the inlet pipe 11 through a pipe. A drive motor 29 is fixedly installed on the top left side of the separation barrel 5. A gear 30 is fixedly connected to the output shaft end of the drive motor 29. A gear ring 32 is fixedly sleeved on the top outer surface of the centrifugal separation cylinder 28. The gear 30 meshes with the gear ring 32.
[0026] When the hydrogen reflux assembly is in use, the reaction tail gas enters the cooling coil 24 of the condenser tank 4 through the exhaust port 6 and exhaust pipe 7. The semiconductor refrigeration chip 25 in the cooling chamber 22 and the cooling coil 24 work together to condense the water vapor in the tail gas. The condensed hydrogen enters the collection chamber 23, and the water is discharged through the drain port 27 of the condenser tank 4. The hydrogen then enters the centrifugal separator 28 of the separator tank 5 through the connecting pipe 26. The drive motor 39 drives the gear 30 to mesh with the gear ring 32 on the outer wall of the centrifugal separator 28, driving the centrifugal separator 28 to rotate. The centrifugal force is used to further remove the residual water in the hydrogen. The removed water is discharged through the drain port 27 of the separator tank 5. The purified hydrogen enters the hydrogen compressor 9 through the top rotary joint 31 and the reflux pipe 8 for pressurization, and finally returns to the inlet pipe 11 for recycling.
[0027] The dosing assembly includes a catalyst addition tank 13, the bottom of which is fixedly connected to the hydrogenation tank 1. A rotating shaft 18 is rotatably connected between the front and rear sides of the catalyst addition tank 13. Several fixing plates 19 are fixedly connected to the outer surface of the rotating shaft 18. A drive motor 14 is fixedly installed on the rear side of the catalyst addition tank 13. The output shaft end of the drive motor 14 is fixedly connected to the rear end of the rotating shaft 18.
[0028] When the dosing assembly is in use, the catalyst dosing box 13 drives the rotating shaft 18 to rotate via the drive motor 14. The fixing plate 19, which is fixed on the rotating shaft 18, rotates with the shaft, so as to evenly and quantitatively feed the catalyst in the box into the hydrogenation tank 1, thereby achieving continuous feeding and avoiding downtime.
[0029] The stirring assembly includes a second drive motor 15, which is fixedly installed on the top of the hydrogenation tank 1. A rotating rod 16 is rotatably installed on the top side inside the hydrogenation tank 1. The top end of the rotating rod 16 is fixedly connected to the output shaft end of the second drive motor 15. Several stirring blades 17 are fixedly connected to the outer surface of the rotating rod 16.
[0030] The stirring assembly, driven by motor 15, rotates the rotating rod 16 and the stirring blades 17 fixed thereon. The high-speed stirring of the blades ensures that the reaction liquid and hydrogen in the hydrogenation tank 1 are fully mixed, thereby improving the reaction efficiency and uniformity.
[0031] A pressure gauge 20 is installed on the top left side of the hydrogenation tank 1. The pressure gauge 20 monitors the pressure data inside the hydrogenation tank 1 in real time, provides feedback to the system, ensures that the reaction is carried out within a safe pressure range, and assists in regulating the operation of the hydrogen pump 10 or the hydrogen compressor 9 to maintain stable reaction conditions.
[0032] Working principle: When this catalytic hydrogenation continuous production unit is in use, the hydrogen pump 10 delivers hydrogen from the hydrogen storage tank 2 to the gas distribution pipe 21 inside the hydrogenation tank 1 through the inlet pipe 11. The gas distribution pipe 21 evenly disperses the hydrogen into the reaction liquid. The drive motor 15 drives the rotating rod 16 and the stirring blades 17 fixed on it to rotate. The high-speed stirring of the blades ensures that the reaction liquid and hydrogen in the hydrogenation tank 1 are fully mixed, promoting the contact and reaction between hydrogen and raw materials. The reaction tail gas enters the cooling coil 24 of the condenser tank 4 through the exhaust port 6 and the exhaust pipe 7. The semiconductor refrigeration chip 25 and the cooling coil in the cooling chamber 22 are also included. The combined action of 24 causes water vapor in the exhaust gas to condense. The condensed hydrogen enters the collection chamber 23, and the water is discharged through the drain outlet 27 of the condensation tank 4. The hydrogen then enters the centrifugal separator 28 of the separator 5 through the connecting pipe 26. The drive motor 39 drives the gear 30 to mesh with the gear ring 32 on the outer wall of the centrifugal separator 28, causing the centrifugal separator 28 to rotate. The centrifugal force is used to further remove residual water in the hydrogen. The removed water is discharged through the drain outlet 27 of the separator 5. The purified hydrogen enters the hydrogen compressor 9 through the return pipe 8 via the top rotary joint 31 for pressurization, and finally returns to the inlet pipe 11 for recycling.
[0033] During the hydrogenation process, the catalyst addition box 13 drives the rotating shaft 18 to rotate via the drive motor 14. The fixed plate 19, which is fixed on the rotating shaft 18, rotates with the shaft, uniformly and quantitatively feeding the catalyst in the box into the hydrogenation tank 1, thereby achieving continuous feeding, avoiding downtime operation, maintaining reaction activity, and after the reaction is completed, the product is discharged through the discharge port 12. The whole process realizes hydrogen recycling and continuous production.
[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A catalytic hydrogenation continuous production apparatus comprising a hydrogenation tank (1), characterized in that: The front side of the hydrogenation tank (1) is provided with a mounting frame (3), the right side of the hydrogenation tank (1) is provided with a hydrogen storage tank (2), the hydrogenation tank (1) and the hydrogen storage tank (2) are provided with a hydrogen pump (10), the output end of the hydrogen storage tank (2) is fixedly communicated with an air inlet pipe (11), the output end of the air inlet pipe (11) is fixedly communicated with the input end of the hydrogen pump (10), the inside bottom side of the hydrogenation tank (1) is provided with a gas distribution pipe (21), the output end of the hydrogen pump (10) is fixedly communicated with the input end of the gas distribution pipe (21) through a pipeline, the bottom rear side of the hydrogenation tank (1) is provided with a discharge port (12), the top front side of the hydrogenation tank (1) is provided with an exhaust port (6), the mounting frame (3) is provided with a hydrogen backflow assembly, the top right side of the hydrogenation tank (1) is provided with a dosing assembly, and the inside of the hydrogenation tank (1) is further provided with a stirring assembly.
2. The apparatus for continuous production of catalytic hydrogenation according to claim 1, characterized in that: The hydrogen backflow assembly comprises a condensation barrel (4) and a separation barrel (5), the condensation barrel (4) and the separation barrel (5) are arranged at the top and the middle of the mounting frame (3) respectively, the inside of the condensation barrel (4) is provided with a cooling chamber (22) and a collection chamber (23) on the top and the bottom respectively, a plurality of semiconductor refrigerating fins (25) are arranged on the inner wall of the cooling chamber (22), a cooling coil (24) is further arranged in the cooling chamber (22), the input end of the cooling coil (24) is fixedly communicated with an exhaust pipe (7), the input end of the exhaust pipe (7) is fixedly communicated with the exhaust port (6), the output end of the cooling coil (24) is fixedly communicated with the collection chamber (23), the right top of the collection chamber (23) is fixedly communicated with a connecting pipe (26), and the bottom left side of the condensation barrel (4) and the separation barrel (5) is provided with a drain port (27), and the inside of the separation barrel (5) is provided with a centrifugal separation mechanism.
3. The apparatus for continuous production of catalytic hydrogenation according to claim 2, characterized in that: The centrifugal separation mechanism comprises a centrifugal separation cylinder (28), the centrifugal separation cylinder (28) is rotatably arranged between the inside top and the inside bottom of the separation barrel (5), a rotary joint (31) is arranged on the top output end and the bottom input end of the centrifugal separation cylinder (28), the output end of the connecting pipe (26) is fixedly communicated with the rotary joint (31) on the bottom side, the rotary joint (31) on the top side is fixedly communicated with a backflow pipe (8), the output end of the backflow pipe (8) is fixedly communicated with a hydrogen compressor (9), the output end of the hydrogen compressor (9) is fixedly communicated with the air inlet pipe (11) through a pipeline, a driving motor three (29) is fixedly arranged on the top left side of the separation barrel (5), a gear (30) is fixedly connected to the output shaft end of the driving motor three (29), a gear ring (32) is fixedly sleeved on the top outer surface of the centrifugal separation cylinder (28), and the gear (30) is engaged with the gear ring (32).
4. The apparatus for continuous production of catalytic hydrogenation according to claim 1, characterized in that: The dosing assembly comprises a catalyst adding box (13), the bottom of the catalyst adding box (13) is fixedly connected in communication with the hydrogenation tank (1), a rotating shaft (18) is rotatably arranged between the front and back sides of the inside of the catalyst adding box (13), a plurality of fixed plates (19) are fixedly connected to the outer surface of the rotating shaft (18), a driving motor (14) is fixedly installed on the back side of the catalyst adding box (13), and the output shaft end of the driving motor (14) is fixedly connected to the rear end of the rotating shaft (18).
5. The apparatus for continuous production of catalytic hydrogenation according to claim 1, characterized in that: The stirring assembly comprises a driving motor (15), which is fixedly installed on the top of the hydrogenation tank (1), a rotating rod (16) is rotatably installed on the top side of the inside of the hydrogenation tank (1), the top end of the rotating rod (16) is fixedly connected to the output shaft end of the driving motor (15), and a plurality of stirring blades (17) are fixedly connected to the outer surface of the rotating rod (16).
6. The apparatus for continuous production of catalytic hydrogenation according to claim 1, characterized in that: A pressure gauge (20) is installed on the top left side of the hydrogenation tank (1).