A chemical catalytic hydrogenation synthesis reaction tower

Abstract

The utility model discloses a kind of reaction towers for chemical catalytic hydrogenation synthesis, including main tower body and the reaction plate assembled in the inside of main tower body, the upper side of the one side of main tower body is fixedly installed with liquid inlet pipe, one end of liquid inlet pipe extends to the inside of main tower body and is fixedly installed with cloth liquid cover, the utility model relates to succinic acid dimethyl ester's catalytic hydrogenation synthesis technical field of intermediate succinic acid dimethyl ester of succinic acid dimethyl ester. The reaction tower for chemical catalytic hydrogenation synthesis, by the cooperation between reaction plate, liquid outlet pipe and gas guide elbow, the contact area and the contact time of gas-liquid are improved, mass transfer process is accelerated, reaction conversion is improved, and uniform contact can avoid local overheating or concentration too high condition, to improve the purity of reaction, by the cooperation of cloth gas cover, exhaust hole and liquid-proof cover, gas can be protected when entering injection, avoid the situation that liquid flows into exhaust hole and is discharged into inlet pipeline, increase functionality, ensure the stability of reaction tower when operating.

Description

Technical Field

[0001] This utility model relates to the field of catalytic hydrogenation synthesis technology of dimethyl succinate, an intermediate of dimethyl succinate, specifically a reaction tower for chemical catalytic hydrogenation synthesis. Background Technology

[0002] Dimethyl succinyl succinate is an important organic synthesis intermediate. Its chemical name is dimethyl 2,5-dioxo-1,4-cyclohexanedicarboxylate, with the molecular formula C10H14O6 and a molecular weight of 228. It appears as white to pale yellow crystals with a melting point of 154-156℃. This compound is insoluble in water and ethanol, but soluble in organic solvents such as toluene, xylene, and chloroform. In terms of the synthesis process of dimethyl succinyl succinate, the mainstream route currently mainly uses the self-condensation reaction of dimethyl succinate (DMS) under alkaline conditions. Dimethyl succinate is obtained by the catalytic hydrogenation of dimethyl maleate, and this catalytic hydrogenation synthesis process can be carried out in a reaction tower.

[0003] The "packed reaction tower" disclosed in publication number "CN221933946U" includes a reaction tower body with several chambers stacked vertically on it. A distribution component for introducing chlorine gas is horizontally arranged on one side of the inner cavity of each chamber. The distribution component includes a first distributor and a flow meter. The inlet port of each flow meter is connected to a conveying pipeline for introducing chlorine gas. A second distributor is arranged on the other side of the bottom chamber. A tee pipe is arranged at the bottom end of the bottom chamber through a lower interface. A material inlet pipe and a material outlet pipe are respectively arranged on both sides of the tee pipe. A jacket is arranged on the outer wall of each chamber. A refrigerant inlet pipe is arranged on one side of the lower end of the jacket, and a refrigerant outlet pipe is arranged on one side of the upper end of the jacket.

[0004] Traditional reaction towers have a small gas-liquid contact area during operation. When the gas-liquid contact area in the reaction tower is insufficient, it will lead to a series of problems such as low mass transfer efficiency, incomplete reaction, and reduced production capacity. To address these issues, we have designed a reaction tower for chemical catalytic hydrogenation synthesis. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a reaction tower for chemical catalytic hydrogenation synthesis, which solves the problem that the gas-liquid contact area is small during operation, leading to low mass transfer efficiency, incomplete reaction, and reduced production capacity when the gas-liquid contact area within the reaction tower is insufficient.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a reaction tower for chemical catalytic hydrogenation synthesis, comprising a main tower body and a reaction plate assembled inside the main tower body;

[0007] A liquid inlet pipe is fixedly installed on the upper side of one side of the main tower body. One end of the liquid inlet pipe extends into the interior of the main tower body and is fixedly installed with a liquid distribution hood. Spray nozzles are evenly and fixedly installed at the bottom of the liquid distribution hood. An air inlet pipe is fixedly installed on the lower side of the other side of the main tower body.

[0008] The top of the reaction plate is uniformly and fixedly equipped with liquid outlet pipes, and each liquid outlet pipe has a through hole on its outer wall. The bottom of the reaction plate has a water leakage hole that communicates with the liquid outlet pipe. The bottom of the reaction plate is fixedly equipped with an air inlet hood, and the top of the air inlet hood is fixedly equipped with air guide bends that extend to the top of the reaction plate at equal intervals. Each end of the air guide bend is fixedly equipped with an exhaust head.

[0009] One end of the air inlet pipe extends to the inner wall of the main tower and is fixedly installed with an air distribution hood. The top of the air distribution hood is evenly provided with exhaust holes, and the top of each exhaust hole is fixedly installed with a liquid-proof cover. An exhaust fan is rotatably installed inside the air distribution hood.

[0010] Preferably, a drive motor is fixedly installed on the lower front of the main tower body, and a transmission box is fixedly connected to the output end of the drive motor. One end of the transmission box extends into the interior of the main tower body and is fixedly connected to the exhaust fan.

[0011] Preferably, an exhaust pipe is fixedly installed on the top of the main tower body, and a drain pipe is fixedly installed on the lower side of one side of the main tower body.

[0012] Preferably, multiple sets of fixing plates are fixedly installed at equal intervals on the outer side of the top of the liquid distribution hood, and one end of the fixing plate is fixedly installed inside the main tower body.

[0013] Preferably, a maintenance pipe is fixedly installed on the upper front of the main tower body, and a closing plate is fixedly installed on the front of the maintenance pipe.

[0014] Preferably, a motor cover is fixedly installed on the lower front side of the main tower body, and the motor cover is fitted over the drive motor.

[0015] This invention provides a reaction tower for chemical catalytic hydrogenation synthesis. Compared with the prior art, it has the following advantages:

[0016] (1) The reaction tower for chemical catalytic hydrogenation synthesis improves the gas-liquid contact area and contact time through the cooperation between the reaction plate, liquid outlet pipe and gas guide bend, accelerates the mass transfer process, improves the reaction conversion rate, and the uniform contact can avoid local overheating or excessively high concentration, thereby improving the purity of the reaction.

[0017] (2) By combining the gas distribution hood, the exhaust port and the liquid protection hood, the gas can be protected when it enters the injection, and the liquid can be prevented from flowing into the gas inlet pipe through the exhaust port and being discharged, thereby increasing functionality and ensuring the stability of the reaction tower during operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the main tower body of this utility model.

[0020] Figure 3 This is a schematic diagram of the liquid distribution cover structure of this utility model.

[0021] Figure 4 This is a schematic diagram of the reaction plate structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the bottom structure of the reaction plate of this utility model.

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the reaction plate of this utility model.

[0024] Figure 7 This is a schematic diagram of the air distribution hood structure of this utility model.

[0025] Figure 8 This is a schematic cross-sectional view of the air distribution hood of this utility model.

[0026] In the diagram: 1. Main tower body; 101. Liquid inlet pipe; 102. Air inlet pipe; 103. Liquid outlet pipe; 104. Exhaust pipe; 2. Drive motor; 201. Motor cover; 202. Transmission box; 203. Exhaust fan; 3. Inspection pipe; 301. Closure plate; 4. Gas distribution hood; 401. Exhaust port; 402. Liquid protection cover; 5. Reaction plate; 501. Liquid outlet pipe; 502. Through hole; 503. Gas guide bend; 504. Exhaust head; 505. Water leakage hole; 506. Air inlet hood; 6. Liquid distribution hood; 601. Nozzle; 602. Fixing plate. Detailed Implementation

[0027] 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 scope of protection of the present utility model.

[0028] Example 1

[0029] Please see Figures 1-8 As shown, this embodiment proposes a reaction tower for chemical catalytic hydrogenation synthesis, including a main tower body 1 and a reaction plate 5 assembled inside the main tower body 1. A liquid inlet pipe 101 is fixedly installed on the upper side of one side of the main tower body 1. One end of the liquid inlet pipe 101 extends into the main tower body 1 and is fixedly installed with a liquid distribution hood 6. Spray nozzles 601 are evenly and fixedly installed at the bottom of the liquid distribution hood 6. An air inlet pipe 102 is fixedly installed on the lower side of the other side of the main tower body 1. A liquid outlet pipe 501 is evenly and fixedly installed on the top of the reaction plate 5. A through hole 502 is opened on the upper part of the outer wall of each liquid outlet pipe 501. A water leakage hole 505 communicating with the liquid outlet pipe 501 is opened on the bottom of the reaction plate 5. An air inlet hood 506 is fixedly installed on the bottom of the reaction plate 5. A gas guide bend pipe 503 extending to the top of the gas inlet hood 506 is fixedly installed at equal intervals on the top of the gas inlet hood 506. An exhaust head 504 is fixedly installed at one end of each gas guide bend pipe 503.

[0030] In operation, the reacting liquid enters the main tower body 1 through the inlet pipe 101. The liquid distribution hood 6 and the nozzle 601 can evenly spray the liquid into the interior of the main tower body 1. The reaction plate 5 is fixedly installed in the center of the main tower body 1. The liquid sprayed by the nozzle 601 falls onto the reaction plate 5. The gas inlet pipe 102 can inject gas into the interior of the main tower body 1. The gas injected through the gas inlet pipe 102 enters the gas guide bend pipe 503 through the gas inlet hood 506 at the bottom of the reaction plate 5. The gas guide bend pipe 503 conducts the gas to the top of the reaction plate 5. The exhaust head 504 at one end of the gas guide bend pipe 503 can discharge the gas. The liquid sprayed by the nozzle 601 accumulates on the surface of the reaction plate 5. The gas is directly discharged into the liquid at the top of the reaction plate 5, allowing the gas and liquid to come into full and uniform contact. This increases the contact area and contact time, accelerates the mass transfer process, and improves the reaction conversion rate. Uniform contact also avoids local overheating or excessive concentration, thus improving the purity of the reaction. When the nozzle 601 continuously sprays onto the top of the reaction plate 5, the liquid level will increase. When the liquid level reaches a certain level, it will flow into the lower part of the reaction plate 5 through the through hole 502 and the drain hole 505 on the outer wall of the liquid outlet pipe 501, thus facilitating continuous reaction operation of the reaction tower.

[0031] Example 2

[0032] Based on Example 1, such as Figure 2 , Figure 7 and Figure 8 As shown, one end of the air inlet pipe 102 extends to the inner wall of the main tower body 1 and is fixedly installed with an air distribution hood 4. The top of the air distribution hood 4 is evenly provided with exhaust holes 401, and the top of each exhaust hole 401 is fixedly installed with a liquid-proof cover 402. An exhaust fan 203 is rotatably installed inside the air distribution hood 4.

[0033] In use, the gas distribution hood 4 can distribute the gas entering through the gas inlet pipe 102 and evenly inject it into the interior of the main tower body 1 through the exhaust port 401, ensuring the uniformity of the gas entering the main tower body 1. The exhaust fan 203 can accelerate the gas entering the main tower body 1 by rotating, making it convenient for the staff to control the speed and total amount of gas entering the main tower body 1. The liquid shield 402 can block and protect the corresponding exhaust port 401, preventing liquids after meals from falling into the gas distribution hood 4 through the exhaust port 401 and flowing out along the gas inlet pipe 102, increasing the functionality of the gas distribution hood 4 and ensuring the stability of the reaction tower during operation.

[0034] like Figure 1 , Figure 2 and Figure 8 As shown, a drive motor 2 is fixedly installed on the lower front of the main tower body 1. The output end of the drive motor 2 is fixedly connected to a transmission box 202. One end of the transmission box 202 extends into the interior of the main tower body 1 and is fixedly connected to the exhaust fan 203.

[0035] In use, the drive motor 2 can drive the exhaust fan 203 to rotate through the transmission box 202, which facilitates the rotation of the exhaust fan 203 and accelerates the speed at which gas enters the main tower body 1.

[0036] like Figure 1 and Figure 2 As shown, an exhaust pipe 104 is fixedly installed on the top of the main tower body 1, and a drain pipe 103 is fixedly installed on the lower side of one side of the main tower body 1.

[0037] In use, the exhaust pipe 104 can discharge the gas after the reaction inside the main tower body 1, and the liquid discharge pipe 103 can discharge the liquid synthesized after the reaction in the main tower body 1, thereby facilitating subsequent processing by equipment.

[0038] like Figure 2 and Figure 3 As shown, multiple sets of fixing plates 602 are fixedly installed at equal intervals on the outer side of the top of the liquid distribution hood 6, and one end of the fixing plate 602 is fixedly installed inside the main tower body 1.

[0039] When in use, the fixing plate 602 can be installed and fixed to the liquid distribution hood 6 during operation to ensure the stability of the liquid distribution hood 6 when it is operating inside the main tower body 1.

[0040] like Figure 1 As shown, a maintenance pipe 3 is fixedly installed on the upper front of the main tower body 1, and a closing plate 301 is fixedly installed on the front of the maintenance pipe 3.

[0041] When in use, the inspection pipe 3 facilitates the maintenance and repair of the interior of the main tower body 1 by the staff. The closing plate 301 can close and seal the inspection pipe 3 when it is not in use, ensuring the stability of the reaction tower during operation.

[0042] like Figure 1 As shown, a motor cover 201 is fixedly installed on the lower front side of the main tower body 1, and the motor cover 201 is fitted over the drive motor 2.

[0043] When in use, the motor cover 201 can shield and protect the exterior of the drive motor 2, ensuring the safety and stability of the drive motor 2 during operation.

[0044] Working principle: Liquid enters the interior of the main tower body 1 through the liquid inlet pipe 101. The liquid distribution hood 6 and the nozzle 601 can evenly spray the liquid onto the reaction plate 5. Gas enters the interior of the main tower body 1 through the gas inlet pipe 102, and can be evenly injected into the interior of the reaction tower through the gas distribution hood 4 and the exhaust port 401. The evenly injected gas enters the gas guide bend 503 through the gas inlet hood 506. The gas guide bend 503 and the exhaust port 504 inject the gas into the liquid at the top of the reaction plate 5, thereby enabling sufficient and uniform contact between the gas and liquid. Through sufficient and uniform contact, the contact area and contact time are increased, and the mass transfer process is accelerated, improving the reaction conversion rate. Uniform contact can avoid local overheating or excessively high concentration, thereby improving the purity of the reaction. The liquid shield 402 can block the top of the exhaust port 401, preventing the liquid discharged through the liquid outlet pipe 501 from entering the interior of the gas distribution hood 4, ensuring the stability of the reaction tower during operation.

[0045] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A chemical catalytic hydrogenation synthesis reaction tower, characterized in that: The utility model provides a reaction plate and main tower body are assembled to main tower body inside, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main tower body, and the reaction plate is arranged in the main ​ ​ ​ 2. The reaction column for catalytic hydrogenation synthesis of chemical industry according to claim 1, characterized in that: ​ 3. The chemical catalytic hydrogenation reaction column according to claim 1, characterized in that: ​ 4. The chemical catalytic hydrogenation reaction column according to claim 1, characterized in that: ​ 5. The chemical catalytic hydrogenation reaction column for synthesis according to claim 1, characterized in that: ​ 6. The chemical catalytic hydrogenation synthesis reaction tower according to claim 2, characterized in that: ​

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