Micro-channel reactor

Abstract

The utility model belongs to the technical field of micro-channel reaction equipment, and particularly discloses a micro-channel reactor which comprises a cooling water pipe, a feeding pipe, a plurality of U-shaped pipes and a discharging pipe, the cooling water pipe is communicated with a plurality of water feeding pipes, each water feeding pipe is communicated with two water feeding branch pipes, the plurality of U-shaped pipes are sequentially communicated in an S shape, and the discharging pipe is communicated with the U-shaped pipes. Each water feeding branch pipe is communicated with the connecting position of the corresponding U-shaped pipe, each U-shaped pipe is composed of a jacketed pipe and an inner pipe, the jacketed pipes are connected to the inner pipes in a sleeved mode, the feeding pipe, the discharging pipe and the U-shaped pipes are all communicated with water return pipes, each water return pipe is provided with a water return thermometer and a water return valve, and the connecting position of each U-shaped pipe is provided with a water feeding thermometer. The micro-channel reactor can effectively improve the reaction uniformity, stabilize the pressure and improve the production safety, the design of the jacketed pipe can effectively reduce heat loss and maintain the heat balance of a reaction system, cooling water enters the multiple branch pipes synchronously, and the stability of the temperature and the pressure of the inner pipe can be maintained.

Description

Technical Field

[0001] This utility model relates to the field of microchannel reaction equipment technology, specifically to a microchannel reactor. Background Technology

[0002] In the development of the chemical industry, microchannel reactors have been widely used in numerous chemical reaction processes due to their high heat and mass transfer efficiency, precise reaction control capabilities, and good safety. They can significantly improve reaction efficiency and meet the stringent requirements for product quality and production efficiency in fields such as fine chemicals and pharmaceuticals.

[0003] In existing technologies, due to the special structure of microchannels, uneven reactions and pressure fluctuations may occur during operation. The release and removal of reaction heat are difficult to control precisely. Reaction heat usually refers to the heat released or absorbed by the system during chemical changes in an isothermal and isobaric process. If the reaction heat cannot be dissipated in a timely and uniform manner, it will cause a sharp increase in local temperature, which will lead to thermal expansion and phase change of the material, ultimately resulting in large pressure fluctuations. Utility Model Content

[0004] The purpose of this invention is to provide a microchannel reactor to solve the problem that the heat of reaction in the microchannel reactor cannot be dissipated in a timely and uniform manner, resulting in a sharp increase in local temperature, which in turn causes thermal expansion and phase change of the material, ultimately leading to large fluctuations in pressure.

[0005] To achieve the above objectives, the basic solution provided by this utility model is as follows: a microchannel reactor, comprising a cooling water pipe, a feed pipe, U-shaped pipe 1, U-shaped pipe 2, U-shaped pipe 3, U-shaped pipe 4, and a discharge pipe. The cooling water pipe is connected to feed pipes 1, 2, 3, and 4. Feed pipe 1 is connected to feed branch pipes 1 and 2. Feed pipe 2 is connected to feed branch pipes 3 and 4. Feed pipe 3 is connected to feed branch pipes 5 and 6. The feed pipe is connected to U-shaped pipe 1. Feed branch pipe 1 is connected at the junction of the feed pipe and U-shaped pipe 1. U-shaped pipe 1 is connected to U-shaped pipe 2. Feed branch pipes 2 and 3 are both connected to... At the connection between U-shaped pipe 1 and U-shaped pipe 2, U-shaped pipe 2 is connected to U-shaped pipe 3. Water supply branch pipe 4 and water supply branch pipe 5 are both connected to the connection between U-shaped pipe 2 and U-shaped pipe 3. U-shaped pipe 3 is connected to U-shaped pipe 4. Water supply branch pipe 6 and water supply pipe 4 are both connected to the connection between U-shaped pipe 3 and U-shaped pipe 4. U-shaped pipe 4 is connected to the discharge pipe. Return water pipe 1 is connected to the feed pipe. Return water thermometer 1 is installed on return water pipe 1. Return water pipe 2 is connected to U-shaped pipe 1, U-shaped pipe 2, and U-shaped pipe 3. Return water thermometer 2 is installed on each return water pipe 2. Return water pipe 3 is connected to the discharge pipe. Return water thermometer 3 is installed on return water pipe 3. Material thermometer is installed on the discharge pipe.

[0006] The principle and beneficial effects of this invention are as follows: Material enters through the feed pipe and flows sequentially through U-shaped tubes one, two, three, and four for reaction, finally exiting through the discharge pipe. Cooling water pipes supply coolant to the jacketed tubes of the U-shaped tubes via water supply pipes one, two, three, and four, as well as branch pipes, to control the reaction temperature. Since each U-shaped tube consists of an inner tube and a jacketed tube, this structure allows the coolant to circulate evenly around the inner tube, achieving efficient heat exchange, ensuring stable reaction temperature, and helping to solve the problem of uneven reaction. Simultaneously, return water thermometers on return water pipes one, two, and three can monitor the return water temperature in real time. Operators adjust the coolant flow rate based on the temperature data, further ensuring temperature stability and indirectly stabilizing the pressure inside the reactor. The series structure of multiple U-shaped tubes increases the residence time and reaction path of the material, allowing for a more complete reaction and reducing pressure fluctuations to some extent. This microchannel reactor effectively improves reaction uniformity, stabilizes pressure, ensures product quality, reduces production costs, and improves production safety.

[0007] Option 2, an optimized version of the basic option, features an inner tube thermometer (number 1) at the connection between U-tube 1 and U-tube 2, an inner tube thermometer (number 2) at the connection between U-tube 2 and U-tube 3, and an inner tube thermometer (number 3) at the connection between U-tube 3 and U-tube 4. These three inner tube thermometers can monitor the temperature inside each U-tube in real time, assisting operators in precise control, ensuring stable reaction temperature, and improving reaction uniformity and safety.

[0008] Option 3, an alternative to Option 2, uses three inner tube thermometers: Inner Tube Thermometer 1, Inner Tube Thermometer 2, and Inner Tube Thermometer 3 are all wall-mounted thermometers. These thermometers, once installed, fit snugly against the wall and can accurately capture temperature changes.

[0009] Option 4, an optimal choice from Option 3, includes return water valves on return water pipes 1, 2, and 3. These valves allow for precise regulation of the return water, stabilizing the reaction temperature and pressure.

[0010] Option 5, an optimal choice from Option 4, uses internal insertion thermometers for the material, return water, and return water thermometers 1, 2, and 3. These internal insertion return water thermometers penetrate deep into the water flow for precise measurement, providing a reliable basis for coolant regulation.

[0011] Option 6, an optimal choice from Option 5, includes water inlet valves on all four water inlet branches: branch 1, branch 2, branch 3, branch 4, branch 5, and branch 6. These valves allow for precise control of the cooling water flow based on real-time temperature, thus stabilizing the reaction temperature.

[0012] Option 7, an optimal choice from Option 6, uses a pneumatic regulating valve for the return water. The pneumatic regulating valve enables automated water flow control, enhancing the precision and speed of flow control compared to manual adjustment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a microchannel reactor according to this utility model. Detailed Implementation

[0014] The present invention will be further described in detail below through specific embodiments:

[0015] The reference numerals in the accompanying drawings of the instruction manual include: 1. Cooling water pipe, 2. Feed pipe, 3. U-shaped pipe one, 4. U-shaped pipe two, 5. U-shaped pipe three, 6. U-shaped pipe four, 7. Discharge pipe, 8. Water supply pipe one, 9. Water supply pipe two, 10. Water supply pipe three, 11. Water supply pipe four, 12. Water supply branch pipe one, 13. Water supply branch pipe two, 14. Water supply branch pipe three, 15. Water supply branch pipe four, 16. Water supply branch pipe five, 17. Water supply branch pipe six, 18. Return water pipe one, 19. Return water thermometer one, 20. Return water pipe two, 21. Return water thermometer two, 22. Return water pipe three, 23. Return water thermometer three, 24. Inner tube thermometer one, 25. Inner tube thermometer two, 26. Inner tube thermometer three, 27. Return water valve, 28. Water supply valve, 29. Material thermometer.

[0016] Example

[0017] The basic implementation examples are as follows: Figure 1As shown: A microchannel reactor includes a cooling water pipe 1, a feed pipe 2, a U-shaped pipe 3, a U-shaped pipe 4, a U-shaped pipe 5, a U-shaped pipe 6, and a discharge pipe 7. The cooling water pipe 1 is connected to an upper water pipe 8, an upper water pipe 9, an upper water pipe 3 10, and an upper water pipe 4 11. Upper water pipe 8 is connected to an upper water branch pipe 12 and an upper water branch pipe 2 13. Upper water pipe 9 is connected to an upper water branch pipe 3 14 and an upper water branch pipe 4 15. Upper water pipe 3 10 is connected to an upper water branch pipe 5 16 and an upper water branch pipe 6 17. The feed pipe 2 is connected to the U-shaped pipe 3, and the upper water branch pipe 12 is connected to the feed pipe 2 and the U-shaped pipe 6. At the connection point of pipe 13, U-shaped pipe 13 connects to U-shaped pipe 24. Water supply branch pipe 213 and water supply branch pipe 314 both connect to the connection point of U-shaped pipe 13 and U-shaped pipe 24. U-shaped pipe 24 connects to U-shaped pipe 35. Water supply branch pipe 415 and water supply branch pipe 516 both connect to the connection point of U-shaped pipe 24 and U-shaped pipe 35. U-shaped pipe 35 connects to U-shaped pipe 46. Water supply branch pipe 617 and water supply pipe 411 both connect to the connection point of U-shaped pipe 35 and U-shaped pipe 46. U-shaped pipe 46 connects to the discharge pipe 7. A return water pipe 18 is connected to the feed pipe 2, and a return water thermometer is installed on the return water pipe 18. 19. Return water pipes 20 are connected to U-shaped pipes 1-3, 2-4, and 3-5, and each return water pipe 20 is equipped with a return water thermometer 21. Return water pipe 3-22 is connected to the discharge pipe 7, and a return water thermometer 3-23 is installed on it. An inner tube thermometer 24 is installed at the connection between U-shaped pipe 1-3 and U-shaped pipe 2-4. An inner tube thermometer 25 is installed at the connection between U-shaped pipe 2-4 and U-shaped pipe 3-5. An inner tube thermometer 3-26 is installed at the connection between U-shaped pipe 3-5 and U-shaped pipe 4-6. A material thermometer 29 is installed on the discharge pipe 7. Inner tube thermometers 24 and 2-2 are also present. 5 and inner tube thermometer 3 26 are both wall-mounted thermometers. Return water valve 27 is provided on return water pipe 1 18, return water pipe 2 20 and return water pipe 3 22. Material thermometer 29, return water thermometer 1 19, return water thermometer 2 21 and return water thermometer 3 23 are all internal insertion thermometers. Water supply branch pipe 1 12, water supply branch pipe 2 13, water supply branch pipe 3 14, water supply branch pipe 4 15, water supply branch pipe 5 16 and water supply branch pipe 6 17 are all equipped with water supply valve 28. Return water valve 27 is a pneumatic regulating valve. Feed pipe 2, discharge pipe 7 and each U-shaped pipe are composed of an inner tube and a jacketed tube, with the jacketed tube sleeved on the inner tube.

[0018] The implementation method of this embodiment is as follows:

[0019] During the raw material heat exchange process, the entire microchannel reactor system is first started. The raw material enters the reactor through the feed pipe 2. Cooling water is injected into the entire reactor simultaneously from the cooling water pipe 1 through the corresponding water supply branch pipe 12 to water supply branch pipe 17, and from the connection of each U-shaped pipe. At this time, the cooling water in the jacketed pipe flows along the outer wall of the inner pipe, forming a double-layer cooling structure. At the same time, return water thermometers 19, 21, 23 and 29 detect the return water and discharge temperatures, respectively. Inner pipe thermometers 24 to 26 monitor the reaction temperature in the reactor in real time. When the inner pipe temperature exceeds the limit, the system will take action. When the temperature is between 35-65℃, the return water valve 27 automatically adjusts the cooling water flow rate according to the temperature signal. For example, when the temperature of the inner tube of U-tube 3 exceeds 65℃, the return water valve 27 on the return water pipe 18 gradually opens to increase the local return water volume. Throughout the process, the raw materials undergo a chemical reaction in the reactor, and the heat of reaction is efficiently discharged through the cooling water in the jacket pipe. Finally, after absorbing the heat, the cooling water returns to the main return water pipe through the return water pipe 18, the return water pipe 20, and the return water pipe 32. The material that has completed the reaction is discharged from the discharge pipe 7. The material thermometer 29 monitors the discharge temperature in real time to ensure that the discharge temperature meets the process requirements.

[0020] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A microchannel reactor characterized by, The system includes a cooling water pipe (1), a feed pipe (2), a U-shaped pipe (3), a U-shaped pipe (4), a U-shaped pipe (5), a U-shaped pipe (6), and a discharge pipe (7). The cooling water pipe (1) is connected to a water inlet pipe (8), a water inlet pipe (9), a water inlet pipe (3) and a water inlet pipe (4) (11). The water inlet pipe (8) is connected to a water inlet branch pipe (12) and a water inlet branch pipe (2) (13). The water inlet pipe (9) is connected to a water inlet branch pipe (3) (14) and a water inlet branch pipe (4). Branch pipe four (15), the water supply pipe three (10) is connected to water supply branch pipe five (16) and water supply branch pipe six (17), the feed pipe (2) is connected to U-shaped pipe one (3), the water supply branch pipe one (12) is connected to the connection between feed pipe (2) and U-shaped pipe one (3), the U-shaped pipe one (3) is connected to U-shaped pipe two (4), the water supply branch pipe two (13) and water supply branch pipe three (14) are both connected to the connection between U-shaped pipe one (3) and U-shaped pipe two (4), the U-shaped pipe 2 (4) is connected to U-shaped pipe 3 (5). Water supply branch pipe 4 (15) and water supply branch pipe 5 (16) are both connected to the connection between U-shaped pipe 2 (4) and U-shaped pipe 3 (5). U-shaped pipe 3 (5) is connected to U-shaped pipe 4 (6). Water supply branch pipe 6 (17) and water supply pipe 4 (11) are both connected to the connection between U-shaped pipe 3 (5) and U-shaped pipe 4 (6). U-shaped pipe 4 (6) is connected to discharge pipe (7). A return water pipe is connected to the feed pipe (2). One (18), the return water pipe one (18) is equipped with a return water thermometer one (19), the U-shaped pipe one (3), the U-shaped pipe two (4) and the U-shaped pipe three (5) are all connected to the return water pipe two (20), each of the return water pipe two (20) is equipped with a return water thermometer two (21), the discharge pipe (7) is connected to the return water pipe three (22), the return water pipe three (22) is equipped with a return water thermometer three (23), and the discharge pipe (7) is equipped with a material thermometer (29).

2. A microchannel reactor according to Claim 1 wherein, An inner tube thermometer 1 (24) is provided at the connection between the U-shaped tube 1 (3) and the U-shaped tube 2 (4), an inner tube thermometer 2 (25) is provided at the connection between the U-shaped tube 2 (4) and the U-shaped tube 3 (5), and an inner tube thermometer 3 (26) is provided at the connection between the U-shaped tube 3 (5) and the U-shaped tube 4 (6).

3. A microchannel reactor according to Claim 2 wherein, The inner tube thermometer 1 (24), inner tube thermometer 2 (25) and inner tube thermometer 3 (26) are all wall-mounted thermometers.

4. A microchannel reactor according to Claim 3 wherein, Each of the return water pipes 1 (18), 2 (20) and 3 (22) is equipped with a return water valve (27).

5. A microchannel reactor according to Claim 4 wherein, The material thermometer (29), return water thermometer one (19), return water thermometer two (21) and return water thermometer three (23) are all interpolation thermometers.

6. A microchannel reactor according to Claim 5 wherein, Water supply valves (28) are provided on the water supply branch pipes one (12), two (13), three (14), four (15), five (16) and six (17).

7. A microchannel reactor according to Claim 6 wherein, The return water valve (27) is a pneumatic regulating valve.

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