High-temperature and high-pressure microchannel continuous reactor

Abstract

The utility model discloses a high-temperature and high-pressure micro-channel continuous reactor and relates to the technical field of reactors. The high-temperature and high-pressure microchannel continuous reactor comprises a high-temperature and high-pressure reactor, a high-pressure and high-pressure inner cylinder is arranged in the high-temperature and high-pressure reactor, an inner cylinder flange is welded to the outer wall of the top of the high-pressure and high-pressure inner cylinder, and a high-pressure upper sealing head is arranged on the outer wall of the top of the inner cylinder flange; a closed high-pressure cavity is formed between the high-pressure upper sealing head and the outer wall of the high-pressure inner cylinder in a sealed mode, and four material channels communicated with the high-pressure cavity are formed in the side face of the high-pressure upper sealing head. The utility model provides a high-temperature and high-pressure micro-channel continuous reactor which integrates high-temperature and high-pressure reaction and continuous reaction, can realize continuous reaction under high-temperature and high-pressure conditions, has complete functions, can feed various materials at the same time during use, and integrates functions of feeding control, continuous reaction, temperature control, discharging treatment and pressure control.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, in particular to a high-temperature and high-pressure microchannel continuous reactor. Background Art

[0002] Reactions in biological, pharmaceutical and chemical production processes are often carried out under high temperature and high pressure environments. Currently, almost all high temperature and high pressure reactions are carried out in high temperature and high pressure reactors.

[0003] The high temperature and high pressure reactor is a closed type, and the reaction can only be operated intermittently, that is, one batch of materials is reacted and processed, and then the next batch of materials is reacted. It cannot be operated continuously, and the overall efficiency is very low. Although there are continuous microchannel reactors in the industry, they are generally unable to withstand high temperature and high pressure due to their structural characteristics. Therefore, this application fully analyzes the existing technology and combines the actual application needs to design a complete set of equipment that can perform microchannel continuous reaction under high temperature and high pressure conditions to solve the problems existing in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a high-temperature and high-pressure microchannel continuous reactor, which solves the problem that almost all high-temperature and high-pressure reactions are currently carried out in high-temperature and high-pressure reactors, which are closed and can only be operated intermittently, that is, one batch of materials is reacted and then another batch of materials is processed, and then the next batch of reactions are carried out, and the problem of not being able to operate continuously. When in use, multiple materials can be introduced at the same time, the reaction temperature can be accurately controlled by a precision electric heater, and the pressure in the reactor cavity can be accurately controlled by introducing gas into the equipment, so that the pressure in the reactor cavity and the pressure in the microchannel tube are balanced, and the pressure of the reactants is reduced by a pressure reducing valve after leaving the reactor, and the temperature is reduced by a cooler, which is convenient for subsequent processing.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-temperature and high-pressure microchannel continuous reactor, comprising a high-temperature and high-pressure reactor, wherein the interior of the high-temperature and high-pressure reactor comprises a high-pressure and high-pressure inner cylinder, the top outer wall of the high-pressure and high-pressure inner cylinder is welded with an inner cylinder flange, the top outer wall of the inner cylinder flange is provided with a high-pressure upper head, the high-pressure upper head and the outer wall of the high-pressure and high-pressure inner cylinder are sealed to form a closed high-pressure cavity, the side of the high-pressure upper head is provided with four material channels communicating with the high-pressure cavity, two of which are material inlets and outlets, and the other two are nitrogen inlets and pressure measuring ports, a nitrogen pressure gauge is installed at the pressure measuring port of the material channel to detect the nitrogen pressure in the cavity, and high-pressure flared ferrule joints are welded at both ends of the material channel;

[0006] The top outer wall of the high-pressure upper head is provided with two temperature measuring ports A and a stirring port which are in communication with the high-pressure cavity. The inner wall of the temperature measuring port A is plugged with temperature measuring probe 1 and temperature measuring probe 2. The inner wall of the high-pressure cavity is provided with a microchannel reaction coil. The inlet and outlet of the microchannel reaction coil are connected with two material channels by welding on a high-pressure flared ferrule joint. The inner wall of the stirring port is provided with a stirrer. The bottom outer wall of the stirrer is fixedly connected with a stirring shaft. The outer wall of the stirring shaft is fixedly connected with a stirring paddle, and the stirring paddle is provided in the high-pressure cavity.

[0007] The outer surface of the high-pressure cavity is evenly wound with an electric heating wire, an insulation layer is added to the outer side of the electric heating wire, and a temperature measuring port B is opened on the inner wall of the insulation layer;

[0008] Three parallel feed valves and corresponding three one-way valves are arranged at the inlet of the material channel, and three different materials are introduced into the microchannel reaction coil at the same time. A discharge valve is arranged at the outlet of the material channel, and a nitrogen pipeline is fixedly connected to the nitrogen inlet of the material channel. Two nitrogen inlet valves, a nitrogen vent valve and a safety valve are installed in series on the outer wall of the nitrogen pipeline.

[0009] Preferably, bolts and nuts are threadedly connected between the high-pressure upper head and the inner cylinder flange, and the high-pressure upper head and the inner cylinder flange are connected by bolts and nuts.

[0010] Preferably, the microchannel reaction coil is arranged in a spiral coil shape.

[0011] Preferably, one end of the temperature measuring probe 1 and the temperature measuring probe 2 is located in the high-pressure cavity, and is used to detect the temperature in the cavity.

[0012] Preferably, a feed main pipe is provided at the entrance of the material channel, and a feed pressure gauge and a feed temperature probe are installed on the feed main pipe, wherein the feed pressure gauge is used to detect the pressure during feeding, and the feed temperature probe is used to detect the temperature during feeding.

[0013] Preferably, a temperature measuring probe 3 is plugged into the inner wall of the temperature measuring port B, and the temperature measuring probe 3 is inserted into the temperature measuring port to measure the surface temperature of the electric heating wire.

[0014] Preferably, a discharge pipe is fixedly connected to the outlet of the material channel, a mixing tube is fixedly connected to the outlet of the discharge pipe, an upper valve and a check valve are installed on the outer wall of the mixing tube, a pressure reducing valve is fixedly connected to the outer wall of the discharge pipe, the pressure reducing valve is used to reduce the outlet pressure, an air cooler is fixedly connected to one side of the pressure reducing valve, the air cooler is used to reduce the outlet liquid temperature, an outlet pipe is provided on one side of the air cooler, a discharge temperature probe is installed on the outlet pipe, and the discharge temperature probe is used to detect the final temperature of the outlet liquid.

[0015] Preferably, the nitrogen inlet valve introduces nitrogen into the high-pressure chamber, the nitrogen vent valve discharges nitrogen to the outside, and the safety valve is used to automatically adjust the pressure in the high-pressure chamber.

[0016] Compared with the related art, the high temperature and high pressure microchannel continuous reactor provided by the utility model has the following beneficial effects:

[0017] 1. The utility model provides a high-temperature and high-pressure microchannel continuous reactor. The greatest advantage is that it integrates high-temperature and high-pressure reaction and continuous reaction, can realize continuous reaction under high-temperature and high-pressure conditions, has complete functions, can feed multiple materials at the same time when in use, and integrates feed control, continuous reaction, temperature control, discharge processing, and pressure control functions.

[0018] 2. The structure of the microchannel reaction coil built into the high-pressure cavity. Sealing the microchannel reaction coil in the high-pressure cavity is the key technology to achieve high-temperature and high-pressure continuous reaction; the spiral structure of the microchannel reaction coil can greatly reduce the volume of the equipment, increase the length of the coil, increase the residence time of the material in the coil, and improve the degree of reaction.

[0019] 3. Explosion-proof design: The entire equipment is designed to be explosion-proof, which can meet the on-site explosion-proof requirements. It is placed in the explosion-proof area, and high-pressure gas is filled into the high-pressure cavity to balance the material pressure in the coil, thereby improving the safety of the equipment.

[0020] 4. Use electricity to heat nitrogen, and then use the heated nitrogen to heat the material in the coil, which can better control the material temperature and make the material temperature more uniform.

[0021] 5. It has the function of material processing after the reactants, and can realize the remixing of materials through the mixing pipeline, the decompression of materials through the pressure reducing valve, and the cooling of materials through the air cooler;

[0022] 6. All-round parameter monitoring: the feed pressure gauge is used to detect the feed pressure, the feed temperature probe is used to detect the feed temperature, the temperature probe is used to monitor the nitrogen temperature in the high-pressure chamber, the temperature probe is used to detect the temperature in the middle of the coil, the pressure gauge is used to detect the nitrogen pressure in the chamber, the temperature probe is used to detect the final temperature of the liquid, and the temperature probe is used to detect the surface temperature of the electric heating wire to ensure the safety and stability of the entire equipment during use.

[0023] 7. Easy to operate. The whole set of equipment is installed as a skid. It can be put into use after only connecting the inlet and outlet pipes and the nitrogen inlet pipe.

[0024] 8. Improve production efficiency and change the traditional high-pressure and high-temperature discontinuous reaction mode. The system can operate and process continuously, which reduces the size of the equipment and greatly improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0026] Figure 2 It is a partial structural schematic diagram of the utility model;

[0027] Figure 3 It is a schematic diagram of the cutaway structure of the utility model;

[0028] Figure 4 It is a schematic diagram of the workflow of the present utility model.

[0029] In the figure: 1. high temperature and high pressure reactor; 2. feed valve; 3. one-way valve; 4. feed temperature probe; 5. feed pressure gauge; 6. pressure gauge; 7. pressure reducing valve; 8. air cooler; 9. discharge temperature probe; 10. discharge valve; 11. upper valve; 12. check valve; 13. nitrogen inlet valve; 14. safety valve; 15. nitrogen vent valve; 16. high pressure inner cylinder; 17. inner cylinder flange; 18. high pressure upper head; 19. agitator; 20. stirring paddle; 21. microchannel reaction coil; 22. electric heating wire; 23. insulation layer; 24. material channel; 25. temperature probe one; 26. temperature probe two; 27. temperature probe three; 28. bolts and nuts. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0031] Example:

[0032] See also Figure 1-Figure 4The utility model provides a technical solution: a high-temperature and high-pressure microchannel continuous reactor, comprising a high-temperature and high-pressure reactor 1, wherein the interior of the high-temperature and high-pressure reactor 1 comprises a high-pressure and high-pressure inner cylinder 16, an inner cylinder flange 17 is welded to the top outer wall of the high-pressure and high-pressure inner cylinder 16, a high-pressure upper head 18 is arranged on the top outer wall of the inner cylinder flange 17, bolts and nuts 28 are threadedly connected between the high-pressure upper head 18 and the inner cylinder flange 17, the high-pressure upper head 18 and the inner cylinder flange 17 are connected by bolts and nuts 28, the high-pressure upper head 18 and the outer wall of the high-pressure and high-pressure inner cylinder 16 are sealed to form a closed high-pressure cavity, four material channels 24 communicating with the high-pressure cavity are arranged on the side of the high-pressure upper head 18, two of which are material inlets and outlets, and the other two are nitrogen inlets and pressure measuring ports, a nitrogen pressure gauge 6 is installed at the pressure measuring port of the material channel 24 to detect the nitrogen pressure in the cavity, and high-pressure flared ferrule joints are welded at both ends of the material channel 24.

[0033] The top outer wall of the high-pressure upper head 18 is provided with two temperature measuring ports A and a stirring port which are connected to the high-pressure cavity. The inner wall of the high-pressure cavity is provided with a microchannel reaction coil 21, which is arranged in a spiral coil shape so that the material has sufficient residence time in the coil. The inlet and outlet of the microchannel reaction coil 21 are connected to two material channels 24 by welding on a high-pressure flared ferrule joint. An agitator 19 is installed on the inner wall of the stirring port. A stirring shaft is fixedly connected to the bottom outer wall of the agitator 19. A stirring paddle 20 is fixedly connected to the outer wall of the stirring shaft. The stirring paddle 20 is arranged in the high-pressure cavity.

[0034] The inner wall of the temperature measuring port A is plugged with a temperature measuring probe 1 25 and a temperature measuring probe 2 26 . One end of the temperature measuring probe 1 25 and the temperature measuring probe 2 26 is located in the high-pressure cavity and is used to detect the temperature in the cavity.

[0035] The outer surface of the high-pressure cavity is evenly wound with an electric heating wire 22, an insulation layer 23 is added to the outer side of the electric heating wire 22, a temperature measuring port B is opened on the inner wall of the insulation layer 23, a temperature measuring probe 27 is plugged into the inner wall of the temperature measuring port B, and the temperature measuring probe 27 is inserted into the temperature measuring port to measure the surface temperature of the electric heating wire 22.

[0036] In this embodiment, in order to achieve the purpose of high temperature, an electric heating wire 22 is wound outside the high-voltage cavity to provide a heat source and a sufficiently thick insulation layer 23 is wrapped to reduce heat loss.

[0037] Three parallel feed valves 2 and corresponding three one-way valves 3 are arranged at the inlet of the material channel 24, and three different materials are introduced into the microchannel reaction coil 21 at the same time. When in use, multiple materials can be introduced at the same time. A feed main pipe is arranged at the inlet of the material channel 24, and a feed pressure gauge 5 and a feed temperature probe 4 are installed on the feed main pipe. The feed pressure gauge 5 is used to detect the pressure during feeding, and the feed temperature probe 4 is used to detect the temperature during feeding;

[0038] A discharge valve 10 is provided at the outlet of the material channel 24, a discharge pipe is fixedly connected to the outlet of the material channel 24, a mixing pipe is fixedly connected to the outlet of the discharge pipe, an upper valve 11 and a check valve 12 are installed on the outer wall of the mixing pipe, a pressure reducing valve 7 is fixedly connected to the outer wall of the discharge pipe, the pressure reducing valve 7 is used to reduce the outlet pressure, an air cooler 8 is fixedly connected to one side of the pressure reducing valve 7, the air cooler 8 is used to reduce the outlet liquid temperature, an outlet pipe is provided on one side of the air cooler 8, a discharge temperature probe 9 is installed on the outlet pipe, and the discharge temperature probe 9 is used to detect the final temperature of the outlet liquid;

[0039] A nitrogen pipeline is fixedly connected to the nitrogen inlet of the material channel 24. Two nitrogen inlet valves 13, a nitrogen vent valve 15 and a safety valve 14 are installed in series on the outer wall of the nitrogen pipeline. The nitrogen inlet valve 13 introduces nitrogen into the high-pressure chamber, the nitrogen vent valve 15 discharges nitrogen to the outside, and the safety valve 14 is used to automatically adjust the pressure in the high-pressure chamber.

[0040] In this embodiment, in order to ensure safety under high-pressure conditions (no pipe burst), a method of injecting high-pressure nitrogen into the high-pressure cavity is adopted to balance the pressure inside and outside the microchannel reaction coil 21. In order to make the material in the microchannel reaction coil 21 evenly heated, high-pressure nitrogen is added to the high-pressure cavity for heat transfer. At the same time, the nitrogen temperature is made uniform by stirring, so that the temperature of the material in the microchannel reaction coil 21 is uniform.

[0041] Working principle: The high-temperature and high-pressure reactor 1 is the main body of the equipment. The structure of the high-temperature and high-pressure reactor 1 is as follows: the high-pressure inner cylinder 16 is welded to the inner cylinder flange 17, the high-pressure upper head 18 and the inner cylinder flange 17 are connected by bolts and nuts 28, and the high-pressure upper head 18 and the high-pressure inner cylinder 16 are sealed by wires to form a closed high-pressure cavity; four material channels 24 connected to the high-pressure cavity are opened on the side of the high-pressure upper head 18, two of which are material inlets and outlets, and the other two are nitrogen inlets and pressure measuring ports. High-pressure flared ferrule joints are welded at both ends of the material channel 24, and two high-pressure cavity-connected material channels 24 are opened on the top of the high-pressure upper head 18. A temperature measuring port and a stirring port communicated with each other; a microchannel reaction coil 21 is built into the high-pressure cavity, and the microchannel reaction coil 21 is arranged in a spiral coil shape. The inlet and outlet of the microchannel reaction coil 21 are connected to two of the material channels 24 through high-pressure expansion sleeve joints welded on the material channels 24. The stirrer 19 is installed on the stirring port at the top of the high-pressure upper head 18, and the stirring paddle 20 is installed on the stirring shaft at the bottom of the stirrer 19. The stirring paddle 20 is in the high-pressure cavity. The temperature measuring probe 1 25 and the temperature measuring probe 26 are inserted into the high-pressure cavity from the two temperature measuring ports at the top of the high-pressure upper head 18 to detect the temperature in the cavity;

[0042] The electric heating wire 22 is evenly wound on the outer surface of the high-pressure cavity, and an insulation layer 23 is added to the outer layer of the electric heating wire 22. A temperature measuring port is opened on the insulation layer 23, and a temperature measuring probe 27 is inserted into the temperature measuring port to measure the surface temperature of the electric heating wire 22.

[0043] Three parallel feed valves 2 and corresponding three one-way valves 3 are arranged on the inlet side of the material channel 24 of the high-temperature and high-pressure reactor 1, and three different materials can be introduced into the microchannel reaction coil 21 at the same time; a feed pressure gauge 5 is installed on the feed main pipe to detect the pressure during feeding, and a feed temperature probe 4 is installed to detect the temperature during feeding; a discharge valve 10 is arranged on the outlet side of the material channel 24 of the high-temperature and high-pressure reactor 1, and a mixing tube is arranged on the discharge pipe near the discharge port, and a valve 11 and a check valve 12 are arranged on the mixing tube. The discharge pipe is also equipped with a pressure reducing valve 7 to reduce the outlet pressure, and an air cooler 8 is arranged after the pressure reducing valve 7 to reduce the outlet liquid temperature, and a discharge temperature probe 9 is installed on the outlet pipe of the air cooler 8 to detect the final temperature of the outlet liquid.

[0044] A nitrogen pipeline is installed at the nitrogen inlet of the material channel 24, including two nitrogen inlet valves 13 connected in series for introducing nitrogen into the high-pressure chamber, two nitrogen vent valves 15 connected in series for discharging nitrogen to the outside, and a safety valve 14 for automatically adjusting the pressure in the high-pressure chamber. A nitrogen pressure gauge 6 is installed at the pressure detection port of the material channel 24 to detect the nitrogen pressure in the chamber.

[0045] In order to achieve high temperature and high pressure continuous operation, this equipment is realized from the following aspects:

[0046] 1. In order to make the reaction complete, a sufficiently long capillary is used to make the microchannel reaction coil 21, which is made into a spiral coil shape so that the material has enough residence time in the coil;

[0047] 2. In order to ensure safety under high pressure conditions (no pipe burst), a method of injecting high-pressure nitrogen into the high-pressure chamber is adopted to balance the pressure inside and outside the microchannel reaction coil 21;

[0048] 3. In order to achieve the purpose of high temperature, an electric heating wire 22 is wound outside the high-pressure cavity to provide a heat source and a sufficiently thick insulation layer 23 is wrapped to reduce heat loss;

[0049] 4. In order to make the material in the microchannel reaction coil 21 heated evenly, high-pressure nitrogen is added into the high-pressure cavity for heat transfer, and the nitrogen temperature is made uniform by stirring, so that the temperature of the material in the microchannel reaction coil 21 is uniform.

Claims

1. A high temperature and high pressure microchannel continuous reactor, comprising a high temperature and high pressure reactor (1), characterized in that: The high-temperature and high-pressure reactor (1) comprises a high-pressure and high-pressure inner cylinder (16) inside, an inner cylinder flange (17) is welded to the top outer wall of the high-pressure and high-pressure inner cylinder (16), a high-pressure upper head (18) is arranged on the top outer wall of the inner cylinder flange (17), the high-pressure upper head (18) and the outer wall of the high-pressure and high-pressure inner cylinder (16) are sealed to form a closed high-pressure cavity, four material channels (24) in communication with the high-pressure cavity are arranged on the side of the high-pressure upper head (18), two of the material channels (24) are material inlets and outlets, and the other two of the material channels (24) are nitrogen inlets and pressure measuring ports, a nitrogen pressure gauge (6) is installed at the pressure measuring port of the material channel (24) to detect the nitrogen pressure in the cavity, and high-pressure flared ferrule joints are welded at both ends of the material channel (24); The top outer wall of the high-pressure upper cover (18) is provided with two temperature measuring ports A and a stirring port which are in communication with the high-pressure cavity; the inner wall of the temperature measuring port A is plugged with a temperature measuring probe 1 (25) and a temperature measuring probe 2 (26); the inner wall of the high-pressure cavity is provided with a microchannel reaction coil (21); the inlet and outlet of the microchannel reaction coil (21) are connected to two material channels (24) by welding on a high-pressure expansion sleeve joint; the inner wall of the stirring port is provided with a stirrer (19); the bottom outer wall of the stirrer (19) is fixedly connected with a stirring shaft; the outer wall of the stirring shaft is fixedly connected with a stirring paddle (20); the stirring paddle (20) is arranged in the high-pressure cavity; The outer surface of the high-pressure cavity is evenly wound with an electric heating wire (22), an outer side of the electric heating wire (22) is additionally provided with a heat-insulating layer (23), and an inner wall of the heat-insulating layer (23) is provided with a temperature measuring port B; The inlet of the material channel (24) is provided with three parallel feed valves (2) and corresponding three one-way valves (3), and three different materials are introduced into the microchannel reaction coil (21) at the same time. The outlet of the material channel (24) is provided with a discharge valve (10), and the nitrogen inlet of the material channel (24) is fixedly connected to a nitrogen pipeline, and the outer wall of the nitrogen pipeline is installed with two series-connected nitrogen inlet valves (13), a nitrogen vent valve (15) and a safety valve (14).

2. A high temperature and high pressure microchannel continuous reactor according to claim 1, characterized in that: Bolts and nuts (28) are threadedly connected between the high-pressure upper end cap (18) and the inner cylinder flange (17), and the high-pressure upper end cap (18) and the inner cylinder flange (17) are connected via the bolts and nuts (28).

3. A high temperature and high pressure microchannel continuous reactor according to claim 1, characterized in that: The microchannel reaction coil (21) is arranged in a spiral coil shape.

4. A high temperature and high pressure microchannel continuous reactor according to claim 1, characterized in that: One end of the temperature measuring probe 1 (25) and the temperature measuring probe 2 (26) is located in the high-pressure cavity and is used to detect the temperature in the cavity.

5. The high temperature and high pressure microchannel continuous reactor according to claim 1, characterized in that: A feed main pipe is provided at the entrance of the material channel (24), and a feed pressure gauge (5) and a feed temperature probe (4) are installed on the feed main pipe. The feed pressure gauge (5) is used to detect the pressure during feeding, and the feed temperature probe (4) is used to detect the temperature during feeding.

6. A high temperature and high pressure microchannel continuous reactor according to claim 1, characterized in that: The inner wall of the temperature measuring port B is plugged with a temperature measuring probe 3 (27), and the temperature measuring probe 3 (27) is inserted into the temperature measuring port to measure the surface temperature of the electric heating wire (22).

7. The high temperature and high pressure microchannel continuous reactor according to claim 1, characterized in that: The outlet of the material channel (24) is fixedly connected to a discharge pipe, the outlet of the discharge pipe is fixedly connected to a mixing pipe, the outer wall of the mixing pipe is installed with an upper valve (11) and a check valve (12), the outer wall of the discharge pipe is fixedly connected to a pressure reducing valve (7), the pressure reducing valve (7) is used to reduce the outlet pressure, one side of the pressure reducing valve (7) is fixedly connected to an air cooler (8), the air cooler (8) is used to reduce the outlet liquid temperature, one side of the air cooler (8) is provided with an outlet pipe, the outlet pipe is installed with an outlet temperature probe (9), the outlet temperature probe (9) is used to detect the final temperature of the outlet liquid.

8. The high temperature and high pressure microchannel continuous reactor according to claim 1, characterized in that: The nitrogen inlet valve (13) introduces nitrogen into the high-pressure chamber, the nitrogen vent valve (15) discharges nitrogen to the outside, and the safety valve (14) is used to automatically adjust the pressure in the high-pressure chamber.

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