Catalytic hydrogenation device

Abstract

The utility model discloses a catalytic hydrogenation device which comprises a reaction cylinder, a breather pipe is rotatably mounted on the top surface of the reaction cylinder, an air inlet pipe is rotatably mounted at the upper end of the breather pipe, a connecting cylinder is fixedly mounted at the lower end of the breather pipe, a plurality of communicating plates are fixedly connected to the outer side of the connecting cylinder, and a plurality of exhaust holes are formed in the surfaces of the communicating plates. A first gear is fixedly mounted on the outer side of the ventilation pipe, and a driving assembly for driving the first gear to rotate is mounted on the top surface of the reaction cylinder. In the hydrogenation process, hydrogen sequentially enters the gas inlet pipe, the breather pipe, the connecting cylinder and the communicating plate and is finally discharged from the exhaust holes, the exhaust holes which are uniformly distributed enable the hydrogen to be discharged at more positions, and when the driving assembly drives the communicating plate to rotate, the raw materials can be stirred.

Description

Technical Field

[0001] This utility model relates to the field of chemical production, specifically a catalytic hydrogenation device. Background Technology

[0002] In the field of chemical production, terephthalic acid is an important organic raw material widely used in the manufacture of polyester fibers, plastics and other products. The purity of terephthalic acid directly affects the quality and performance of subsequent products. Therefore, an efficient purification process is crucial.

[0003] The commonly used purification method for crude terephthalic acid is hydrogenation, which involves dissolving crude terephthalic acid in water under high temperature and pressure, then hydrogenating impurities in the presence of a palladium catalyst, followed by crystallization and filtration. However, the hydrogenation process often faces the problem of insufficient mixing between hydrogen and the solution. Because the hydrogen is added at a fixed position in the solution, it cannot be evenly dispersed to participate in the reaction, resulting in incomplete hydrogenation and poor purification of terephthalic acid. Incompletely reacted hydrogen not only wastes resources but also increases production costs. Furthermore, incomplete reaction can lead to excessive impurities in the product, reducing product quality and market competitiveness. Therefore, a catalytic hydrogenation device needs to be designed to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a catalytic hydrogenation device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a catalytic hydrogenation device, comprising a reaction cylinder, a vent pipe rotatably mounted on the top surface of the reaction cylinder, an inlet pipe rotatably mounted on the upper end of the vent pipe, a connecting cylinder fixedly mounted on the lower end of the vent pipe, and multiple connecting plates fixedly connected to the outer side of the connecting cylinder, with a plurality of exhaust holes opened on the surface of the connecting plates.

[0006] A first gear is fixedly installed on the outside of the vent pipe, and a drive assembly for driving the first gear to rotate is installed on the top surface of the reaction cylinder.

[0007] Preferably, the drive assembly includes a motor, which is fixedly mounted on the top surface of the reaction vessel, and a second gear is fixedly mounted on the output end of the motor, the second gear meshing with the first gear.

[0008] Preferably, a stirring plate is installed on one side of the connecting plate.

[0009] Preferably, the cross-section of the connecting plate is rectangular, and the vent holes are evenly distributed on the surface of the connecting plate.

[0010] Preferably, there is a dynamic seal between the air inlet pipe and the vent pipe, and a dynamic seal between the vent pipe and the reaction cylinder.

[0011] Preferably, a feed pipe is fixedly connected to the top of the reaction cylinder, and a discharge pipe is fixedly connected to the bottom of the reaction cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this catalytic hydrogenation device, hydrogen is introduced into the inlet pipe. The hydrogen enters the vent pipe and connecting cylinder through the inlet pipe, and can enter the connecting plate from the connecting cylinder. Finally, it passes through the exhaust port and comes into contact with the raw material to react. A large number of exhaust ports are distributed on the surface of the connecting plate, which can increase the hydrogen outlet position and make the reaction effect better.

[0014] 2. In this catalytic hydrogenation device, turning on the motor switch drives the second gear to rotate, which in turn drives the first gear to rotate. The first gear, through the vent pipe, drives the connecting cylinder and the connecting plate to rotate, which changes the position of the exhaust port, thereby changing the position of the hydrogen gas outlet and making the reaction more complete. At the same time, the rotation of the connecting plate drives the stirring plate to rotate, and the connecting plate and the stirring plate together agitate the raw materials in the reaction cylinder cavity, making the hydrogen gas more uniform and fully contact the raw materials, thus improving the reaction efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the connecting cylinder structure of this utility model.

[0018] In the diagram: 1. Reaction cylinder; 2. Feed pipe; 3. Discharge pipe; 4. Vent pipe; 5. Connecting cylinder; 6. Connecting plate; 7. Stirring blade; 8. First gear; 9. Motor; 10. Second gear; 11. Air inlet pipe; 12. Exhaust port. Detailed Implementation

[0019] 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.

[0020] Example 1

[0021] Please refer to Figure 1-3As shown, this utility model provides a catalytic hydrogenation device, including a reaction cylinder 1. A vent pipe 4 is rotatably installed on the top surface of the reaction cylinder 1. An inlet pipe 11 is rotatably installed on the upper end of the vent pipe 4. A connecting cylinder 5 is fixedly installed on the lower end of the vent pipe 4. Multiple connecting plates 6 are fixedly connected to the outside of the connecting cylinder 5. Several exhaust holes 12 are opened on the surface of the connecting plates 6.

[0022] A first gear 8 is fixedly installed on the outside of the vent pipe 4, and a drive assembly for driving the first gear 8 to rotate is installed on the top surface of the reaction cylinder 1.

[0023] Specifically, during the hydrogenation process, hydrogen enters the inlet pipe 11, the vent pipe 4, the connecting cylinder 5, and the connecting plate 6 in sequence, and is finally discharged from the exhaust port 12. The evenly distributed exhaust ports 12 allow for more hydrogen discharge locations, and when the drive component rotates the connecting plate 6, it can have a stirring effect on the raw materials.

[0024] The drive assembly includes a motor 9, which is fixedly installed on the top surface of the reaction cylinder 1. A second gear 10 is fixedly installed at the output end of the motor 9. The second gear 10 meshes with the first gear 8. When the switch of the motor 9 is turned on, the second gear 10 is driven to rotate, thereby driving the first gear 8 to rotate. The first gear 8 drives the connecting cylinder 5 and the connecting plate 6 to rotate through the vent pipe 4.

[0025] Among them, a stirring plate 7 is installed on one side of the connecting plate 6. When the connecting plate 6 drives the stirring plate 7 to rotate, it can stir the raw materials in the reaction cylinder 1.

[0026] Wherein: the cross section of the connecting plate 6 is rectangular, and the exhaust holes 12 are evenly distributed on the surface of the connecting plate 6, so that the hydrogen exhaust position can be relatively evenly distributed in the raw material.

[0027] Among them, the dynamic seal between the inlet pipe 11 and the vent pipe 4, and the dynamic seal between the vent pipe 4 and the reaction cylinder 1, ensure the sealing performance of the reaction cylinder 1. After the inlet pipe 11 and the hydrogen output device are fixed, the rotation of the vent pipe 4 will not affect the hydrogen transmission between the inlet pipe 11 and the vent pipe 4, thus preventing hydrogen leakage.

[0028] Wherein: the top of the reaction cylinder 1 is fixedly connected to the feed pipe 2, and the bottom of the reaction cylinder 1 is fixedly connected to the discharge pipe 3. The feed pipe 2 can be used to conveniently add raw materials into the reaction cylinder 1, and the discharge pipe 3 can be used to conveniently discharge the raw materials after the reaction is completed.

[0029] Working principle: This utility model is a catalytic hydrogenation device. When in use, a raw material solution is added into the reaction cylinder 1 and hydrogen gas is introduced into the gas inlet pipe 11. The hydrogen gas enters the gas vent pipe 4 and the connecting cylinder 5 through the gas inlet pipe 11, and can enter the connecting plate 6 from the connecting cylinder 5. Finally, it passes through the exhaust hole 12 and comes into contact with the raw material to react. A large number of exhaust holes 12 are distributed on the surface of the connecting plate 6, which can increase the hydrogen gas outlet position and make the reaction effect better.

[0030] Turning on the motor 9 switches drives the second gear 10 to rotate, which in turn drives the first gear 8 to rotate. The first gear 8 then drives the connecting cylinder 5 and the connecting plate 6 to rotate through the vent pipe 4, which changes the position of the exhaust port 12 and thus changes the position of the hydrogen gas outlet, making the reaction more complete.

[0031] At the same time, the rotation of the connecting plate 6 can drive the stirring plate 7 to rotate, and the connecting plate 6 and the stirring plate 7 together stir the raw materials in the inner cavity of the reaction cylinder 1, making the hydrogen gas more uniform and fully contact the raw materials, thus improving the reaction efficiency.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A catalytic hydrogenation apparatus, comprising a reaction chamber (1), characterized in that: A vent pipe (4) is rotatably installed on the top surface of the reaction cylinder (1). An air inlet pipe (11) is rotatably installed on the upper end of the vent pipe (4). A connecting cylinder (5) is fixedly installed on the lower end of the vent pipe (4). Multiple connecting plates (6) are fixedly connected to the outside of the connecting cylinder (5). Several exhaust holes (12) are opened on the surface of the connecting plate (6). A first gear (8) is fixedly installed on the outside of the vent pipe (4), and a drive assembly for driving the first gear (8) to rotate is installed on the top surface of the reaction cylinder (1).

2. The catalytic hydrogenation apparatus according to claim 1, characterized in that: The drive assembly includes a motor (9), which is fixedly installed on the top surface of the reaction cylinder (1). A second gear (10) is fixedly installed at the output end of the motor (9), and the second gear (10) meshes with the first gear (8).

3. The catalytic hydrogenation apparatus according to claim 1, characterized in that: A stirring plate (7) is installed on one side of the connecting plate (6).

4. The catalytic hydrogenation apparatus according to claim 1, characterized in that: The cross-section of the connecting plate (6) is rectangular, and the exhaust holes (12) are evenly distributed on the surface of the connecting plate (6).

5. A catalytic hydrogenation apparatus according to claim 1, characterized in that: The air inlet pipe (11) and the vent pipe (4) are dynamically sealed, and the vent pipe (4) and the reaction cylinder (1) are dynamically sealed.

6. A catalytic hydrogenation apparatus according to claim 1, characterized in that: The top of the reaction cylinder (1) is fixedly connected to a feed pipe (2), and the bottom of the reaction cylinder (1) is fixedly connected to a discharge pipe (3).

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