Device for promoting aldehyde hydrogenation reaction
By designing a device including a combustion furnace, reactor and exhaust gas treatment box, the problem of slow reaction speed and safety of the hydrogenation reactor is solved, and the rapid and safe progress of the aldehyde hydrogenation reaction is achieved.
Patent Information
- Application Number
- CN202421688166.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The existing hydrogenation reactors have slow reaction speed and improper treatment of residual hydrogen can easily cause explosions, which lacks safety.
Design a device including a combustion furnace, reactor and exhaust gas treatment box, adopts a dispersion plate, agitating shaft, a pumping pipe and a waste gas treatment box structure, increase the contact between the aldehyde raw materials and catalyst through a stirring rake, control the reaction pressure and temperature, and safely treat the remaining hydrogen.
The aldehyde hydrogenation reaction speed is improved, ensuring the safety of the reaction, and suitable for large-scale promotion and use.
Smart Images
Figure CN223128024U_ABST
Abstract
Description
Technical Field:
[0001] The utility model relates to the technical field of chemical equipment, and particularly relates to a device for promoting the aldehyde hydrogenation reaction. Background Art:
[0002] In the production process of neopentyl glycol, the aldehyde hydrogenation reaction to produce alcohol is an essential step in the process. Currently, some hydrogenation reactors have a slow reaction rate, and the remaining hydrogen cannot be processed. Once not properly handled, it is prone to explosion. Therefore, there is an urgent need for a hydrogenation reactor with a fast reaction rate and high safety. Summary of the Utility Model:
[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art, and provide a device for promoting the aldehyde hydrogenation reaction, which has a fast reaction rate and high safety.
[0004] To solve the problems in the background art, the utility model adopts the following technical scheme: It includes a combustion furnace, a reactor, and an exhaust gas treatment box. The bottom of the reactor is seated in the combustion furnace. The top of the reactor is successively provided with a pressure relief valve, a pressure gauge, a catalyst addition pipe, an aldehyde raw material inlet pipe, and a thermometer. A dispersion plate is arranged inside the reactor. The center of the dispersion plate vertically penetrates through a hydrogenation pipe. One end of the hydrogenation pipe penetrates through the reactor, and the other end of the hydrogenation pipe extends to the lower part of the reactor. Branches are arranged at the bottom of the hydrogenation pipe, and a plurality of hydrogen outlet pipes are arranged at the bottom of the branches. A stirring shaft is arranged below the hydrogenation pipe. One end of the stirring shaft is connected to the inner wall of the reactor through a bearing, and the other end of the stirring shaft penetrates through the reactor and is connected to a motor. A plurality of long stirring rakes and a plurality of short stirring rakes are arranged on the stirring shaft. The long stirring rakes and the short stirring rakes are arranged at intervals and asymmetrically. An air extraction pipe is arranged above the dispersion plate. One end of the air extraction pipe is communicated with the inside of the reactor, and the other end of the air extraction pipe is communicated with the exhaust gas treatment box. An air extraction pump is arranged on the air extraction pipe. A torch is arranged inside the exhaust gas treatment box.
[0005] The number of the branches is eight, which are divided into upper and lower layers. The four in the upper layer and the four in the lower layer are staggered in position. The branches in each layer are evenly distributed on the outer circumferential wall of the strengthening pipe.
[0006] The long stirring rakes and the short stirring rakes are in a sickle shape.
[0007] A drain pipe is arranged at the bottom of the exhaust gas treatment box.
[0008] The beneficial effects of the present utility model are as follows: it has comprehensive functions and is convenient to use. By means of the long stirring rake and the short stirring rake, the contact between the aldehyde raw material and the catalyst is increased, and the reaction rate of the aldehyde raw material and the catalyst is improved; the pressure and temperature inside the reactor can be well controlled through the pressure gauge and the thermometer, providing a good reaction environment; an exhaust gas treatment box is added to safely treat the remaining hydrogen. While improving the reaction rate, the device for promoting the aldehyde hydrogenation reaction achieves the purpose of safe reaction and is suitable for large-scale popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS:
[0009] Figure 1 It is a schematic structural diagram of the present utility model;
[0010] Figure 2 It is a top view of the hydrogenation pipe of the present utility model. SPECIFIC EMBODIMENTS:
[0011] Referring to the drawings, the present utility model specifically adopts the following embodiments: it includes a combustion furnace 1, a reactor 2 and an exhaust gas treatment box 8. The bottom of the reactor 2 is seated in the combustion furnace 1. A pressure relief valve 17, a pressure gauge 16, a catalyst addition pipe 15, an aldehyde raw material inlet pipe 13 and a thermometer 12 are successively arranged on the top of the reactor 2. A dispersion plate 11 is arranged inside the reactor 2. A hydrogenation pipe 14 vertically passes through the center of the dispersion plate 11. One end of the hydrogenation pipe 14 passes through the reactor 1, and the other end of the hydrogenation pipe 14 extends to the lower part of the reactor 2. A branch pipe 18 is arranged at the bottom of the hydrogenation pipe 14, and a plurality of hydrogen outlet pipes are arranged at the bottom of the branch pipe 18. A stirring shaft 4 is arranged below the hydrogenation pipe 14. One end of the stirring shaft 4 is connected to the inner wall of the reactor 2 through a bearing, and the other end of the stirring shaft 4 passes through the reactor and is connected to a motor 19. A plurality of long stirring rakes 3 and a plurality of short stirring rakes 5 are arranged on the stirring shaft 4. The long stirring rakes 3 and the short stirring rakes 5 are arranged at intervals and are asymmetrically arranged; an air extraction pipe 9 is arranged above the dispersion plate 11. One end of the air extraction pipe 9 is communicated with the inside of the reactor 2, and the other end of the air extraction pipe 9 is communicated with the exhaust gas treatment box 8. An air extraction pump 10 is arranged on the air extraction pipe 9. A torch 7 is arranged inside the exhaust gas treatment box 8. The number of the branch pipes 18 is eight, which are divided into upper and lower layers. The four in the upper layer are staggered with the four in the lower layer, and the branch pipes 18 in each layer are evenly distributed on the outer circumferential wall of the strengthening pipe 14. The long stirring rakes 3 and the short stirring rakes 5 are in a sickle shape. A drain pipe is arranged at the bottom of the exhaust gas treatment box 8.
[0012] When this device for promoting aldehyde hydrogenation reaction is in use, the aldehyde hydrogenation conditions are relatively mild. Generally, the temperature is 50 - 150 °C (using nickel or chromium catalyst). To accelerate the reaction and improve the transfer of the equilibrium reaction, the hydrogenation of such compounds is also carried out under pressure. When using a nickel catalyst, the pressure is 1 - 2 Mpa. Start the combustion furnace 1, and the combustion furnace 1 heats the reactor 2 to 50 - 150 °C. The aldehyde raw material is added through the aldehyde raw material inlet pipe 13, and after falling onto the dispersion plate 11, it is evenly scattered at the bottom of the reactor 2. The catalyst is added through the catalyst addition pipe 15, and after falling onto the dispersion plate 11, it is evenly scattered at the bottom of the reactor 2. Start the motor 19, and the motor 19 drives the stirring shaft 4 connected to it to rotate. The long stirring rake 3 and the short stirring rake 5 on the stirring shaft 4 rotate together to stir the aldehyde raw material and the catalyst. The long stirring rake 3 and the short stirring rake 5 are in a sickle shape and are arranged at intervals, which can stir up the aldehyde raw material and the catalyst both nearby and far away. Hydrogen is introduced through the hydrogenation pipe 14, and the hydrogen enters the reactor 2 through the branch pipe 18 and the hydrogen outlet pipe. The long stirring rake 3 and the short stirring rake 5 stir up the aldehyde raw material, the catalyst, and the hydrogen together. Observe the pressure gauge 16 to keep the pressure in the reactor 2 within 1 - 2 Mpa, providing a good reaction environment for the aldehyde raw material hydrogenation reaction. After the reaction, there is remaining hydrogen in the reactor 2. Start the air extraction pump 10, and the air extraction pump 10 introduces the remaining hydrogen in the reactor 2 into the waste gas treatment box 8 through the air extraction pipe 9. The hydrogen contacts the torch 7 in the waste gas treatment box 8 and reacts to generate water, and the generated water is discharged through the drain pipe.
[0013] During the reaction process, observe the pressure gauge 16. Once the pressure in the reactor 2 is too high, open the pressure relief valve 17 to relieve the pressure.
[0014] The branch pipe 18 at the bottom of the hydrogenation pipe 14 is divided into upper and lower layers, and the two layers of branch pipes are staggered and have a 45 - degree angle, which ensures a larger output area of hydrogen, and hydrogen contacts the aldehyde raw material and the catalyst over a large area, thus accelerating the reaction rate.
[0015] In summary, this device for promoting aldehyde hydrogenation reaction has comprehensive functions and is easy to use. Through the long stirring rake and the short stirring rake, the contact between the aldehyde raw material and the catalyst is increased, and the reaction rate of the aldehyde raw material and the catalyst is improved; through the pressure gauge and the thermometer, the pressure and temperature in the reactor can be well controlled, providing a good reaction environment; by adding a waste gas treatment box, the remaining hydrogen is safely treated. This device for promoting aldehyde hydrogenation reaction not only improves the reaction rate but also achieves the purpose of safe reaction, and is suitable for large - scale promotion and use.
Claims
1. An apparatus for promoting the aldehyde hydrogenation reaction, characterized in that: It includes a combustion furnace (1), a reactor (2) and an exhaust gas treatment tank (8). The bottom of the reactor (2) is seated inside the combustion furnace (1). A pressure relief valve (17), a pressure gauge (16), a catalyst addition pipe (15), an aldehyde raw material inlet pipe (13) and a thermometer (12) are successively arranged at the top of the reactor (2). A dispersion plate (11) is arranged inside the reactor (2). A hydrogenation pipe (14) vertically passes through the center of the dispersion plate (11). One end of the hydrogenation pipe (14) passes through the reactor (1), and the other end of the hydrogenation pipe (14) extends to the lower part of the reactor (2). A branch pipe (18) is arranged at the bottom of the hydrogenation pipe (14). A number of hydrogen outlet pipes are arranged at the bottom of the branch pipe (18). A stirring shaft (4) is arranged below the hydrogenation pipe (14). One end of the stirring shaft (4) is connected to the inner wall of the reactor (2) through a bearing, and the other end of the stirring shaft (4) passes through the reactor and is connected to a motor (19). A number of long stirring rakes (3) and a number of short stirring rakes (5) are arranged on the stirring shaft (4). The long stirring rakes (3) and the short stirring rakes (5) are arranged at intervals and are asymmetrically arranged; An air extraction pipe (9) is arranged above the dispersion plate (11). One end of the air extraction pipe (9) is communicated with the inside of the reactor (2), and the other end of the air extraction pipe (9) is communicated with the exhaust gas treatment tank (8). An air extraction pump (10) is arranged on the air extraction pipe (9). A torch (7) is arranged inside the exhaust gas treatment tank (8).
2. The device for promoting the aldehyde hydrogenation reaction according to claim 1, characterized in that: The number of the branch pipes (18) is eight, which are divided into upper and lower layers. The four in the upper layer and the four in the lower layer are staggered in position. The branch pipes (18) in each layer are evenly distributed on the outer circumferential wall of the strengthening pipe (14).
3. The device for promoting the aldehyde hydrogenation reaction according to claim 1, wherein: The long stirring rakes (3) and the short stirring rakes (5) are in a sickle shape.
4. The device for promoting the aldehyde hydrogenation reaction according to claim 1, characterized in that: A drain pipe is arranged at the bottom of the exhaust gas treatment tank (8).