A gas dispersion plate for adipic acid oxidation reactor

Abstract

The utility model discloses a kind of gas dispersion disc for adipic acid oxidation reactor, belong to chemical reactor equipment technical field, including container and the top cover installed at its opening, the top cover is equipped with the main pipe of rotation setting, the top of main pipe is equipped with swivel joint, main pipe outer wall is equipped with several air jet disc;Top cover top-mounted drive assembly, adjacent air jet disc is provided with stirring ring, drive assembly is used to drive main pipe and the air jet disc fixed thereon to carry out unidirectional continuous rotation, while driving stirring ring reciprocating swing relative to central main pipe.The utility model can eliminate flow dead zone, improve the rate of adipic acid oxidation reaction.

Description

Technical Field

[0001] This utility model relates to the field of chemical reactor equipment technology, and in particular to a gas dispersion disc for an adipic acid oxidation reactor. Background Technology

[0002] Adipic acid is an important organic dicarboxylic acid, and it has a wide range of applications in the chemical industry as a key raw material for the production of products such as nylon, polyurethane, plasticizers and lubricants.

[0003] In the production process, in order to effectively disperse the gas into the liquid, traditional adipic acid oxidation reactors usually use fixed gas distributors, such as porous pipes, distribution plates, or static nozzles. However, these static distributors have significant drawbacks: First, they produce large and unevenly distributed bubbles, resulting in limited gas-liquid contact area and low mass transfer efficiency; second, dead zones are easily formed in the reactor, causing insufficient mixing of materials and excessively high or low local temperatures. This not only reduces the reaction conversion rate but may also trigger side reactions, affecting product yield and purity. Utility Model Content

[0004] The purpose of this invention is to eliminate the flow dead zone and increase the rate of adipic acid oxidation reaction.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gas dispersion disk for an adipic acid oxidation reactor, comprising a container and a top cover installed at its opening, wherein the top cover is equipped with a rotatably mounted main pipe, a rotary joint is installed on the top of the main pipe, and a plurality of jet disks are provided on the outer wall of the main pipe. The drive assembly installed on the top of the top cover has a stirring ring between adjacent jet discs. The drive assembly is used to drive the main pipe and the jet discs fixed on it to rotate continuously in one direction, while driving the stirring ring to oscillate back and forth relative to the central main pipe.

[0006] As a further description of the above technical solution: the drive assembly includes a motor mounted on the top of the top cover via an L-shaped rod, and a gear is fixedly connected to the output shaft of the motor.

[0007] As a further description of the above technical solution: a gear ring is fixedly installed on the outer wall of the main tube, and the gear and the gear ring mesh with each other.

[0008] As a further description of the above technical solution: the reciprocating rotary assembly includes a rotary rod rotatably mounted on the bottom wall of the top cover, and a plurality of reciprocating rods fixedly connected to the stirring ring are fitted on the outer wall of the rotary rod.

[0009] As a further description of the above technical solution: a drive disk that penetrates the top cover and extends into the inner cavity of the container is fixedly installed on the bottom wall of the gear, and a drive rod fixed to the bottom wall of the drive disk extends into the strip hole provided by the reciprocating rod.

[0010] As a further description of the above technical solution: the inner diameter of the stirring ring is larger than the outer diameter of the main pipe, the stirring ring is sleeved on the outside of the main pipe, and there is a gap between the two.

[0011] As a further description of the above technical solution: gas nozzles are provided on both the upper and lower surfaces of the jet disk.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: By combining the unidirectional continuous rotation of the jet disk with the reciprocating rotation of the stirring ring, the jet disk, through its jet design on its upper and lower surfaces, achieves the effect of initially shearing the gas into fine bubbles at high speed and multiple angles. At the same time, the sleeved stirring ring acts on the bubbles released by the jet disk and the surrounding liquid in a reciprocating rotation manner, generating secondary shearing, collision and disturbance, promoting further breakup of bubbles and uniform dispersion in the liquid phase, increasing the contact area between the gas and liquid phases, and ensuring that the reactants, catalysts and bubbles can be fully and uniformly mixed in the entire reactor space, avoiding local overheating or uneven concentration.

[0013] By adjusting the motor speed, the rotational speed of the jet disc and the reciprocating frequency of the stirring ring can be adjusted synchronously, thereby optimizing the fluid dynamics environment inside the reactor according to different process requirements and achieving flexible control of mixing. Attached Figure Description

[0014] Figure 1 A front view of the present invention is shown; Figure 2 This utility model is shown Figure 1 Enlarged view of point A in the middle; Figure 3 A perspective view of the reciprocating rotary assembly of this utility model is shown.

[0015] Legend: 10. Container; 11. Top cover; 12. Main pipe; 13. Rotary joint; 14. Jet disc; 141. Gas nozzle; 15. Stirring ring; 16. L-shaped rod; 17. Motor; 18. Gear; 19. Gear ring; 20. Rotating rod; 21. Reciprocating rod; 22. Drive disc; 221. Drive rod; 211. Strip hole. Detailed Implementation

[0016] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-3 This utility model provides a technical solution: a gas dispersion disc for an adipic acid oxidation reactor, including a container 10, which is the main body of the adipic acid oxidation reactor. A top cover 11 is sealed and installed at the opening of the container 10 by means of flange connection or welding.

[0018] A through hole is provided at the center of the top cover 11. The main pipe 12 passes through the through hole and can rotate. To ensure sealing, a sealing element (such as a mechanical seal or packing seal, not shown) is provided between the main pipe 12 and the top cover 11. The main pipe 12 is the main channel for gas to enter the reactor. A rotary joint 13 is installed on its top. The rotary joint 13 is a standard industrial component. Its function is to allow high-pressure gas (usually air or oxygen-enriched air) to be continuously delivered from an external gas source (not shown) to the interior of the main pipe 12 while it rotates. The rotary joint 13 is selected from the MK series gas / gas-electric integrated rotary joint (slip ring), or other types of joints can be selected according to actual needs.

[0019] Furthermore, on the outer wall of the main pipe 12 that extends into the container 10, several disc-shaped jet disks 14 are fixedly installed at certain intervals along its axial direction. These jet disks 14 rotate together with the main pipe 12. In order to achieve uniform gas dispersion, several gas nozzles 141 are opened on the upper and lower surfaces of each jet disk 14. When high-pressure gas enters through the main pipe 12 and is distributed to each jet disk 14, it will be ejected at high speed from these gas nozzles 141, forming fine bubbles, increasing the gas-liquid contact area. The gas is ejected from both the upper and lower surfaces, which can more effectively agitate the liquid in the vicinity of the jet disk, avoiding liquid stratification or flow dead zones caused by unidirectional injection.

[0020] Furthermore, in order to further enhance the mixing effect, a stirring ring 15 is provided between two adjacent jet discs 14. The inner diameter of the stirring ring 15 is larger than the outer diameter of the main pipe 12. Therefore, the stirring ring 15 is sleeved on the outside of the main pipe 12, and there is a gap between the two so that they do not interfere with each other. The stirring ring 15 is designed to reciprocate relative to the main pipe 12, thereby generating strong shearing and disturbance to the fluid.

[0021] By combining the unidirectional continuous rotation of the jet disk 14 with the reciprocating rotation of the stirring ring 15, the jet disk 14, through its jetting design on its upper and lower surfaces, achieves the effect of initially shearing the gas into fine bubbles at high speed and multiple angles. At the same time, the sleeved stirring ring 15 acts on the bubbles released by the jet disk 14 and the surrounding liquid in a reciprocating rotation manner, generating secondary shearing, collision and disturbance, promoting further breakup of bubbles and uniform dispersion in the liquid phase, increasing the contact area between the gas and liquid phases, ensuring that the reactants, catalysts and bubbles can be fully and uniformly mixed in the entire reactor space, and avoiding local overheating or uneven concentration.

[0022] By adjusting the rotational speed of the motor 17, the rotational speed of the jet disk 14 and the reciprocating frequency of the stirring ring 15 can be adjusted synchronously, thereby optimizing the fluid dynamic environment inside the reactor according to different process requirements and achieving flexible control of mixing.

[0023] Furthermore, all rotational movements are achieved by an integrated drive assembly mounted on the top of the top cover 11. Specifically, a motor 17 is mounted on one side of the top of the top cover 11 via an L-shaped rod 16 or other form of bracket. A gear 18 is fixedly connected to the output shaft of the motor 17. Meanwhile, a gear ring 19 that matches the gear 18 is fixedly mounted on the outer wall of the main tube 12 above the top cover 11.

[0024] When the motor 17 starts, its output shaft drives the gear 18 to rotate. Since the gear 18 meshes with the gear ring 19, the gear ring 19 is driven to rotate, which in turn drives the main pipe 12 fixed to it and all the jet discs 14 to rotate in one direction continuously. The speed of the motor 17 can be adjusted according to the process requirements, thereby controlling the rotation speed of the jet discs 14.

[0025] Furthermore, the reciprocating rotation of the stirring ring 15 is achieved through a reciprocating rotation assembly. Specifically, a rotating rod 20 is rotatably installed on the bottom wall of the top cover 11 (i.e., one side inside the container 10). Each stirring ring 15 is fixedly connected to the rotating rod 20 through a reciprocating rod 21. When the rotating rod 20 rotates around its own axis, it will drive the reciprocating rod 21 to swing, thereby driving the stirring ring 15 to complete the reciprocating rotational motion outside the main tube 12.

[0026] Furthermore, the power source of the rotating rod 20 is the same as that of the drive tube 12, namely the motor 17. The transmission relationship is as follows: a drive disk 22 is eccentrically fixed on the bottom wall of the gear 18, and a vertically downward drive rod 221 is fixed on the drive disk 22. The drive rod 221 extends into the slot 211 opened on one of the reciprocating rods 21.

[0027] During operation, the motor 17 drives the gear 18 to rotate, and the drive disk 22 fixed on the gear 18 rotates at the same speed and direction. Since the drive rod 221 is mounted on the drive disk 22 in an eccentric manner, the movement trajectory of the drive rod 221 is circular.

[0028] The motion of the drive rod 221 on the circumferential trajectory is converted into the reciprocating oscillation of the reciprocating rod 21 through its cooperation with the strip hole 211. The design of the strip hole 211 allows the drive rod 221 to slide flexibly in it, thereby realizing the conversion of rotational motion into reciprocating motion.

[0029] Since all the reciprocating rods 21 are fixed on the rotating rod 20 and fixedly connected to the stirring ring 15, the reciprocating motion of a single reciprocating rod 21 will drive all the stirring rings 15 and all the reciprocating rods 21 to rotate back and forth.

[0030] Work steps: An external gas source delivers high-pressure gas into the main pipe 12 via a rotary joint 13.

[0031] When the motor 17 starts, it drives the main pipe 12 and the jet disk 14 fixed thereon to rotate continuously in one direction through the meshing of the gear 18 and the gear ring 19.

[0032] High-pressure gas is conveyed downward along the main pipe 12 and ejected from the gas nozzles 141 on the upper and lower surfaces of the rotating jet disk 14, forming diffused microbubbles.

[0033] At the same time, the motor 17 drives the gear 18 to rotate, and the eccentric drive rod 221 located at its bottom moves in the strip hole 211 of the reciprocating rod 21, converting the circular motion into the reciprocating oscillation of the reciprocating rod 21.

[0034] The oscillation of the reciprocating rod 21 drives the stirring ring 15 to oscillate reciprocally outside the main tube 12.

[0035] The unidirectional rotation of the jet disk 14 and the reciprocating rotation of the stirring ring 15 create a complex relative motion, which generates strong shearing, turbulence and mixing effects on the liquid phase in the reactor, greatly promoting the breaking and dispersion of bubbles, enhancing gas-liquid mass transfer, and thus improving the oxidation reaction rate and yield of adipic acid.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A gas dispersion disc for an adipic acid oxidation reactor, comprising a container (10) and a top cover (11) installed at its opening, characterized in that: The top cover (11) is equipped with a rotating main pipe (12), the top of the main pipe (12) is equipped with a rotary joint (13), and the outer wall of the main pipe (12) is provided with several jet discs (14). The top cover (11) has a drive assembly installed on top, and a stirring ring (15) is provided between adjacent jet discs (14). The drive assembly is used to drive the main pipe (12) and the jet discs (14) fixed thereon to rotate continuously in one direction. At the same time, the stirring ring (15) is driven to swing back and forth relative to the central main pipe (12) by the reciprocating rotation assembly.

2. The gas dispersion disk for an adipic acid oxidation reactor according to claim 1, characterized in that: The drive assembly includes a motor (17) mounted on the top of the top cover (11) via an L-shaped rod (16), and a gear (18) is fixedly connected to the output shaft of the motor (17).

3. The gas dispersion disk for an adipic acid oxidation reactor according to claim 2, characterized in that: A toothed ring (19) is fixedly installed on the outer wall of the main tube (12), and the gear (18) meshes with the toothed ring (19).

4. The gas dispersion disk for an adipic acid oxidation reactor according to claim 2, characterized in that: The reciprocating rotary assembly includes a rotating rod (20) rotatably mounted on the bottom wall of the top cover (11), and the outer wall of the rotating rod (20) is fixedly fitted with several reciprocating rods (21) that are fixedly connected to the stirring ring (15).

5. A gas dispersion disk for an adipic acid oxidation reactor according to claim 4, characterized in that: A drive disk (22) is fixedly installed on the bottom wall of the gear (18), which penetrates the top cover (11) and extends into the inner cavity of the container (10). The drive rod (221) fixed on the bottom wall of the drive disk (22) extends into the strip hole (211) provided by the reciprocating rod (21).

6. The gas dispersion disk for an adipic acid oxidation reactor according to claim 1, characterized in that: The inner diameter of the stirring ring (15) is larger than the outer diameter of the main pipe (12). The stirring ring (15) is sleeved on the outside of the main pipe (12), and there is a gap between the two.

7. A gas dispersion disk for an adipic acid oxidation reactor according to claim 1, characterized in that: The upper and lower surfaces of the jet disk (14) are provided with gas nozzles (141).

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