Hydrogenation reactor with mixing stirrer

Abstract

This utility model discloses a mixing agitator for a hydrogenation reactor, comprising a reactor body, multiple legs fixedly connected to the outer wall of the bottom of the reactor body, a top cover rotatably connected to the top of the reactor body, a feed pipe fixedly connected to the top of the top cover, a feed cover plate rotatably connected to the top of the feed pipe, a discharge pipe fixedly connected to the bottom of the reactor body, a discharge valve fixedly connected to the outer wall of the discharge pipe, a stirring mechanism installed on the inner wall of the reactor body, an aeration treatment mechanism installed on the top of the reactor body, and a foam elimination mechanism installed inside the reactor body. The air pump of this utility model's aeration treatment mechanism introduces hydrogen gas into the rotating shaft through the air inlet pipe, and sprays it out from the aeration pipe through the air guide hose. This, combined with the motor driving the rotating shaft and stirring rod of the stirring mechanism, causes the hydrogen gas to disperse into tiny bubbles. Simultaneously, a scraper removes material from the reactor wall, avoiding dead zones and improving the uniformity of the gas-liquid-solid three-phase mixing. The mass transfer coefficient is improved compared to traditional agitators.

Description

Technical Field

[0001] This utility model relates to the field of agitator technology, and in particular to a mixing agitator for a hydrogenation reactor. Background Technology

[0002] In hydrogenation reactions, the mixer is a key component for achieving uniform mixing of the gas-liquid-solid three phases, and its performance directly affects the reaction mass transfer efficiency and product quality. Hydrogenation reactions typically require mixers to possess multiple functions, including gas dispersion, solid suspension, and uniform temperature control. Especially when handling high-viscosity materials or catalyst-containing systems, efficient stirring is necessary to prevent problems such as catalyst sedimentation, bubble coalescence, and uneven localized reactions. However, existing mixers still have significant shortcomings when dealing with complex operating conditions.

[0003] Currently, most agitators used in hydrogenation reactors employ a single structural design, such as traditional propeller or turbine agitators. These agitators suffer from the following technical drawbacks: First, they exhibit a limited flow field pattern, making it difficult to simultaneously achieve axial mixing and radial shear. For example, while propeller agitators can generate strong axial flow, their gas dispersion efficiency is low. Second, they lack adaptability to operating conditions, failing to dynamically adjust the stirring mode according to the reaction stage. For instance, in the initial stage of the reaction, high-viscosity materials require strong convective mixing, while in the later stages, when gas-liquid mass transfer demands are high, existing agitators struggle to switch flow field patterns. Third, there is a significant conflict between energy consumption and efficiency; increasing the rotational speed to enhance mixing often leads to accelerated catalyst wear or a surge in power consumption. Therefore, there is an urgent need to develop a highly efficient stirring device with multi-dimensional mixing capabilities that can adapt to different reaction stages. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a mixing stirrer for a hydrogenation reactor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mixing stirrer for a hydrogenation reactor includes a reactor body, with multiple legs fixedly connected to the outer wall of the bottom of the reactor body, a top cover rotatably connected to the top of the reactor body, a feed pipe fixedly connected to the top of the top cover, a feed cover plate rotatably connected to the top of the feed pipe, a discharge pipe fixedly connected to the bottom of the reactor body, a discharge valve fixedly connected to the outer wall of the discharge pipe, a stirring mechanism provided on the inner wall of the reactor body, an aeration treatment mechanism provided on the top of the reactor body, and a foam elimination mechanism provided inside the reactor body.

[0007] Preferably, the stirring mechanism includes a motor and a rotating shaft, a top box is fixedly connected to the top of the top cover, the motor and the top box are fixedly connected, the bottom output end of the motor is fixedly connected to the rotating shaft, and multiple stirring rods are fixedly connected to the outer wall of the rotating shaft.

[0008] Preferably, a scraper is fixedly connected to the other end of the stirring rod, and the scraper is in natural contact with the inner wall of the vessel.

[0009] Preferably, the foam elimination mechanism includes a rotating plate and thin rods, the rotating plate and the outer wall of the rotating shaft are fixedly connected, the thin rods and the outer wall of the rotating plate are fixedly connected, and they are evenly distributed.

[0010] Preferably, the aeration treatment mechanism includes an air pump and an air inlet pipe. The air inlet pipe is fixedly connected to the outer wall of one end of the top box. The air pump and the air inlet pipe are fixedly connected. The rotating shaft is hollow. An air guide hole is opened on the outer wall of the rotating shaft. The air guide hole is located inside the top box. An air guide hose is fixedly connected to the bottom of the outer wall of the rotating shaft. The air guide hose is located inside the vessel body.

[0011] Preferably, a spring is fixedly connected to the bottom of the rotating shaft, an air guide plate is fixedly connected to the bottom of the spring, the bottom of the air guide hose is fixedly connected to the air guide plate, and multiple aeration pipes are fixedly connected to the bottom of the air guide plate.

[0012] Preferably, a cooling plate is fixedly connected to one side of the inner wall of the top box, and the cooling plate is fixedly connected to a heat dissipation device.

[0013] The beneficial effects of this utility model are as follows:

[0014] The air pump of the aeration treatment unit introduces hydrogen into the rotating shaft through the air inlet pipe, and sprays it out from the aeration pipe through the air guide hose. In conjunction with the motor of the stirring mechanism, the rotating shaft and stirring rod are driven to rotate, so that the hydrogen is dispersed into tiny bubbles. At the same time, the scraper removes the material from the vessel wall, avoids dead corners, improves the uniformity of the gas-liquid-solid three-phase mixing, and the mass transfer coefficient is improved compared with traditional agitators.

[0015] The rotating plate of the foam elimination mechanism rotates with the rotating shaft, and the thin rod breaks up the foam generated by the reaction to prevent instability of the gas-liquid interface. The cooling plate and heat dissipation equipment in the top box work together to control the temperature. Combined with the heat dissipation effect of the hollow rotating shaft, the temperature fluctuation inside the vessel is reduced, avoiding catalyst deactivation or side reactions caused by high temperature. At the same time, the spring buffers the vibration of the aeration pipe and extends the service life of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of a mixing stirrer for a hydrogenation reactor proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of the back of a mixing stirrer for a hydrogenation reactor proposed in this utility model;

[0018] Figure 3 This is a cross-sectional structural diagram of a mixing stirrer for a hydrogenation reactor proposed in this utility model;

[0019] Figure 4 for Figure 3Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Kettle body, 2. Top cover, 3. Feed pipe, 4. Feed cover plate, 5. Top box, 6. Support legs, 7. Heat dissipation equipment, 8. Discharge valve, 9. Discharge pipe, 10. Motor, 11. Air guide pipe, 12. Scraper, 13. Stirring rod, 14. Thin rod, 15. Rotating plate, 16. Rotating shaft, 17. Air pump, 18. Air inlet pipe, 19. Cooling plate, 20. Air guide plate, 21. Aeration pipe, 22. Air guide hose, 23. Spring. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-4 A mixing agitator for a hydrogenation reactor includes a reactor body 1. Multiple support legs 6 are fixedly connected to the outer wall of the bottom of the reactor body 1. A top cover 2 is rotatably connected to the top of the reactor body 1. A feed pipe 3 is fixedly connected to the top of the top cover 2. A feed cover plate 4 is rotatably connected to the top of the feed pipe 3. A discharge pipe 9 is fixedly connected to the bottom of the reactor body 1. A discharge valve 8 is fixedly connected to the outer wall of the discharge pipe 9. A stirring mechanism is installed on the inner wall of the reactor body 1. An aeration treatment mechanism is installed on the top of the reactor body 1. A foam elimination mechanism is installed inside the reactor body 1. The air pump 17 of the aeration treatment mechanism introduces hydrogen gas into the rotating shaft 16 through the air inlet pipe 18, and sprays it out from the aeration pipe 21 through the air guide hose 22. The motor 10 of the stirring mechanism drives the rotating shaft 16 and the stirring rod 13 to rotate, dispersing the hydrogen gas into tiny bubbles. At the same time, the scraper 12 scrapes away material from the reactor wall, avoiding dead corners and improving the uniformity of the gas-liquid-solid three-phase mixing. The mass transfer coefficient is improved compared to traditional agitators.

[0023] In this utility model, the stirring mechanism includes a motor 10 and a rotating shaft 16. A top box 5 is fixedly connected to the top of the top cover 2. The motor 10 and the top box 5 are fixedly connected. The bottom output end of the motor 10 is fixedly connected to the rotating shaft 16. Multiple stirring rods 13 are fixedly connected to the outer wall of the rotating shaft 16. The motor 10 of the stirring mechanism drives the rotating shaft 16 and the stirring rods 13 to rotate.

[0024] The other end of the stirring rod 13 is fixedly connected to a scraper 12. The scraper 12 is in natural contact with the inner wall of the vessel 1. The scraper 12 scrapes off the material on the vessel wall to avoid dead corners.

[0025] The foam elimination mechanism includes a rotating plate 15 and thin rods 14. The rotating plate 15 is fixedly connected to the outer wall of the rotating shaft 16, and the thin rods 14 are fixedly connected to the outer wall of the rotating plate 15 and are evenly distributed. The rotating plate 15 of the foam elimination mechanism rotates with the rotating shaft 16, and the thin rods 14 break the foam generated by the reaction to prevent the gas-liquid interface from becoming unstable.

[0026] The aeration treatment mechanism includes an air pump 17 and an air inlet pipe 18. The air inlet pipe 18 is fixedly connected to the outer wall of one end of the top box 5. The air pump 17 and the air inlet pipe 18 are fixedly connected. The rotating shaft 16 is hollow. An air guide hole is opened on the outer wall of the rotating shaft 16. The air guide hole is located inside the top box 5. An air guide hose 22 is fixedly connected to the bottom of the outer wall of the rotating shaft 16. The air guide hose 22 is located inside the vessel body 1. A spring 23 is fixedly connected to the bottom of the rotating shaft 16. An air guide plate 20 is fixedly connected to the bottom of the spring 23. The bottom of the air guide hose 22 is fixedly connected to the air guide plate 20. Multiple aeration pipes 21 are fixedly connected to the bottom of the air guide plate 20. The air pump 17 of the aeration treatment mechanism introduces hydrogen into the rotating shaft 16 through the air inlet pipe 18 and sprays it out from the aeration pipes 21 through the air guide hose 22.

[0027] A cooling plate 19 is fixedly connected to one side of the inner wall of the top chamber 5. The cooling plate 19 is fixedly connected to a heat dissipation device 7. The cooling plate 19 and the heat dissipation device 7 in the top chamber 5 work together to control the temperature. Combined with the heat dissipation effect of the hollow rotating shaft 16, the temperature fluctuation inside the reactor is reduced, and the catalyst deactivation or side reaction caused by high temperature is avoided.

[0028] Working Principle: In the idle period of this device, all the above-mentioned components, which refer to structural parts, are connected. The specific connection method should refer to the working principle below, and the connection between each component is completed in the order of operation. The detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and will not explain it again. When using this device, the material is loaded into the vessel 1 through the feed pipe 3. After the top cover 2 is sealed, the gas pump 17 sends hydrogen into the rotating shaft 16 through the air inlet pipe 18, and sprays it out from the aeration pipe 21 through the gas guide hose 22. The motor 10 drives the rotating shaft 16 to drive the stirring rod 13 to rotate. While stirring the material, the hydrogen is dispersed into bubbles. The scraper 12 scrapes the material on the vessel wall to prevent sedimentation. The rotating plate 15 and the thin rod 14 break the reaction foam. The cooling plate 19 and the heat dissipation device 7 maintain the stable temperature inside the vessel. After the reaction is completed, the discharge valve 8 is opened to discharge the product from the discharge pipe 9. The spring 23 buffers the aeration pipe 21 to prevent vibration damage, so as to achieve efficient mixing and stable temperature control of the hydrogenation reaction.

[0029] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A mixed stirrer for a hydrogenation reactor, comprising a reactor body (1), the outer wall of the bottom of the reactor body (1) is fixedly connected with a plurality of supporting legs (6), characterized in that, The top of the vessel body (1) is rotatably connected to a top cover (2), the top of the top cover (2) is fixedly connected to a feed pipe (3), the top of the feed pipe (3) is rotatably connected to a feed cover plate (4), the bottom of the vessel body (1) is fixedly connected to a discharge pipe (9), the outer wall of the discharge pipe (9) is fixedly connected to a discharge valve (8), the inner wall of the vessel body (1) is provided with a stirring mechanism, the top of the vessel body (1) is provided with an aeration treatment mechanism, and the inside of the vessel body (1) is provided with a foam elimination mechanism.

2. The hybrid stirrer of claim 1, wherein The stirring mechanism includes a motor (10) and a rotating shaft (16). A top box (5) is fixedly connected to the top of the top cover (2). The motor (10) and the top box (5) are fixedly connected. The bottom output end of the motor (10) is fixedly connected to the rotating shaft (16). Multiple stirring rods (13) are fixedly connected to the outer wall of the rotating shaft (16).

3. The hybrid stirrer of claim 2, wherein, The other end of the stirring rod (13) is fixedly connected to a scraper (12), and the scraper (12) is in natural contact with the inner wall of the vessel body (1).

4. The hybrid stirrer of claim 3, wherein The foam elimination mechanism includes a rotating plate (15) and a thin rod (14). The rotating plate (15) and the outer wall of the rotating shaft (16) are fixedly connected. The thin rod (14) and the outer wall of the rotating plate (15) are fixedly connected and are evenly distributed.

5. The mixing agitator according to claim 4, characterized in that, The aeration treatment mechanism includes an air pump (17) and an air inlet pipe (18). The air inlet pipe (18) is fixedly connected to the outer wall of one end of the top box (5). The air pump (17) and the air inlet pipe (18) are fixedly connected. The rotating shaft (16) is hollow. An air guide hole is opened on the outer wall of the rotating shaft (16). The air guide hole is located inside the top box (5). An air guide hose (22) is fixedly connected to the bottom of the outer wall of the rotating shaft (16). The air guide hose (22) is located inside the vessel body (1).

6. The mixing agitator according to claim 5, characterized in that, A spring (23) is fixedly connected to the bottom of the rotating shaft (16), an air guide plate (20) is fixedly connected to the bottom of the spring (23), the bottom of the air guide hose (22) is fixedly connected to the air guide plate (20), and multiple aeration pipes (21) are fixedly connected to the bottom of the air guide plate (20).

7. The mixing agitator according to claim 6, characterized in that, A cooling plate (19) is fixedly connected to one side of the inner wall of the top box (5), and a heat dissipation device (7) is fixedly connected to the cooling plate (19).

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