Microchannel reactor for chloropropanoic acid production

Abstract

The utility model discloses a micro -channel reactor for chloropropionic acid production belongs to chemical production equipment technical field, including cooling temperature control water tank, the inner wall fixedly connected with equidistance arrangement's micro -channel pipeline of cooling temperature control water tank, the outer surface of every micro -channel pipeline all fixedly communicated with the convex pipe, the outer surface of every micro -channel pipeline all fixedly communicated with the installation turbulence cylinder, the inside of every installation turbulence cylinder all rotatoryly connected with turbulence helical fan blade, the outer surface of every group turbulence helical fan blade all fixedly connected with equidistance circumferential arrangement's limit mobile link. The micro -channel reactor for chloropropionic acid production, through setting up micro -channel pipeline, convex pipe, waterproof solenoid valve and the cooperation of water jet pipe, the flow rate of raw materials is changed to facilitate the mixing of raw materials in micro -channel pipeline, and then the cooperation of cooling temperature control water tank, circulating water pump, connecting pipe and refrigerator is utilized, and the reaction temperature is accurately controlled, the occurrence of side reaction is effectively reduced, and the service life and operating efficiency of the equipment are improved.

Description

Technical Field

[0001] This utility model belongs to the field of chemical production equipment technology, and in particular relates to a microchannel reactor for the production of chloropropionic acid. Background Technology

[0002] Chloropropionic acid is an important organic chemical raw material and intermediate, and it has a wide range of applications in pesticides, pharmaceuticals and dyes. The main production methods of chloropropionic acid include chlorination and acrylonitrile process, among which chlorination is a more commonly used method, which requires the use of microchannel reactors to process chloropropionic acid.

[0003] When existing microchannel reactors are used for the production of chloropropionic acid, the flow distribution of chloropropionic acid reactants within the microchannels is not uniform enough, affecting the consistency and stability of the reaction. Cleaning and maintaining the microchannels is also difficult, easily causing channel blockage and reducing the service life and operating efficiency of the equipment.

[0004] Therefore, we propose a microchannel reactor for chloropropionic acid production to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve the problems of uneven reaction and difficulty in cleaning and maintenance of microchannel reactors used in the production of chloropropionic acid in the prior art, and to propose a microchannel reactor for the production of chloropropionic acid.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A microchannel reactor for chloropropionic acid production includes a cooling and temperature-controlled water tank. The inner wall of the cooling and temperature-controlled water tank is fixedly connected with microchannel pipes arranged at equal intervals. A convex tube is fixedly connected to the outer surface of each microchannel pipe, and a baffle cylinder is fixedly connected to the outer surface of each microchannel pipe. A baffle spiral fan blade is rotatably connected inside each baffle spiral fan blade. A set of baffle spiral fan blades has equidistantly arranged circumferentially positioned limiting rods fixedly connected to the outer surface of each set of baffle spiral fan blades. Several sets of limiting rods are slidably connected to the interiors of several baffle cylinders. The outer surface of each microchannel pipe is fixedly connected to a waterproof solenoid valve. The input end of each waterproof solenoid valve is fixedly connected to a water spray pipe. The top end of each water spray pipe passes through the cooling temperature control water tank and extends to the top of the cooling temperature control water tank. The front and back of the cooling temperature control water tank are respectively fixedly connected to a connecting pipe and a circulating water pump. The front of the circulating water pump is fixedly connected to the back of the cooling temperature control water tank. The input end of the circulating water pump is fixedly connected to a connecting pipe. The input end of the connecting pipe and the output end of the connecting pipe are both fixedly connected to a refrigeration unit.

[0008] Preferably, each of the microchannel pipes has an input pipe fixedly connected to its input end, and a first connecting block is fixedly connected to the outer surface of several input pipes. The right side of the first connecting block is fixedly connected to the left side of the cooling temperature control water tank.

[0009] Preferably, a quantitative input control box is fixedly connected to the left side of the first connecting block, and the input end of each input pipe is fixedly connected to an input bucket pipe. The input end of each input bucket pipe passes through the quantitative input control box and extends to the top of the quantitative input control box.

[0010] Preferably, each of the water spray pipes is fixedly connected to a water supply pipe at its input end, and the input ends of several of the water supply pipes are fixedly connected to an extension main pipe.

[0011] Preferably, the input end of the extension manifold is fixedly connected to a gear pump, and the bottom surface of the gear pump is fixedly connected to the upper surface of the cooling temperature control water tank.

[0012] Preferably, each of the microchannel pipes has an output pipe fixedly connected to its output end, and a second connecting block is fixedly connected to the outer surface of several output pipes. The left side of the second connecting block is fixedly connected to the right side of the cooling temperature control water tank.

[0013] Preferably, an extension plate is fixedly connected to the right side of the cooling temperature control water tank, and the bottom surface of the refrigeration unit is fixedly connected to the upper surface of the extension plate.

[0014] Preferably, a support rod is fixedly connected to the upper surface of the extension plate, and the top end of the support rod is fixedly connected to the outer surface of the connecting pipe.

[0015] In summary, the technical effects and advantages of this utility model are as follows:

[0016] By combining microchannels, convex tubes, a baffle cylinder, baffle spiral fan blades, a limiting moving rod, a waterproof solenoid valve, and a water spray pipe, chloropropionic acid can be reacted and processed within multiple microchannels. The convex tubes outside the microchannels alter the flow rate of the raw materials, facilitating mixing. The baffle spiral fan blades and the limiting moving rod, rotating and sliding within the baffle spiral fan blades, further agitate the raw materials within the microchannels, altering their flow rate and facilitating mixing. Finally, the waterproof solenoid valve controls the water spray pipe, allowing for convenient agitation of the materials within the microchannels. The raw materials are impacted and diluted, and the microchannels are also flushed. Then, by using a combination of a cooling temperature-controlled water tank, microchannels, connecting pipes, circulating water pumps, connecting pipes, and a chiller, the high-temperature cooling water is cooled down by the power provided by the circulating water pumps and the chiller. This allows the cooling temperature-controlled water tank to continuously circulate cooler water, which quickly dissipates and removes the heat generated by the reaction in the microchannels within the tank. This precisely controls the reaction temperature, effectively reduces the occurrence of side reactions, improves the purity and yield of the product, and extends the service life and operating efficiency of the equipment. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the quantitative input control box of this utility model;

[0018] Figure 2 This is a three-dimensional rear view of the cooling temperature control water tank of this utility model;

[0019] Figure 3 This is a three-dimensional cross-sectional view of the cooling temperature control water tank of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the turbulence-inducing spiral fan blade of this utility model.

[0021] In the diagram: 1. Cooling temperature control water tank; 2. Microchannel pipe; 3. Protruding pipe; 4. Installation baffle; 5. Limiting movement rod; 6. Baffle spiral fan blade; 7. Waterproof solenoid valve; 8. Spray pipe; 9. Circulating water pump; 10. Connecting pipe; 11. Refrigeration unit; 12. Connecting pipe; 13. First connecting block; 14. Input pipe; 15. Quantitative input control box; 16. Input bucket pipe; 17. Output pipe; 18. Second connecting block; 19. Water supply pipe; 20. Extension main pipe; 21. Gear pump; 22. Extension plate; 23. Support and reinforcement rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-4 A microchannel reactor for chloropropionic acid production includes a cooling and temperature-controlled water tank 1. The inner wall of the cooling and temperature-controlled water tank 1 is fixedly connected with microchannel pipes 2 arranged at equal intervals. The input end of each microchannel pipe 2 is fixedly connected to an input pipe 14. The outer surfaces of several input pipes 14 are fixedly connected to a first connecting block 13. The right side of the first connecting block 13 is fixedly connected to the left side of the cooling and temperature-controlled water tank 1. Using the first connecting block 13, multiple input pipes 14 can be installed at the input ends of multiple microchannel pipes 2, thereby facilitating the delivery of chloropropionic acid production raw materials into multiple microchannel pipes 2.

[0024] A quantitative input control box 15 is fixedly connected to the left side of the first connecting block 13. The quantitative input control box 15 is a box with an internal structure for weighing and controlling the conveying of materials. The input end of each input pipe 14 is fixedly connected to an input hopper 16. The input end of each input hopper 16 passes through the quantitative input control box 15 and extends to the top of the quantitative input control box 15. The raw materials for chloropropionic acid production are manually conveyed to multiple microchannel pipes 2 through the input hopper 16, the quantitative input control box 15, and multiple input pipes 14. The quantitative input control box 15 can be used to weigh and control the conveying of the raw materials conveyed to the multiple microchannel pipes 2.

[0025] Each microchannel pipe 2 has an output pipe 17 fixedly connected to its output end. The outer surfaces of several output pipes 17 are fixedly connected to a second connecting block 18. The left side of the second connecting block 18 is fixedly connected to the right side of the cooling temperature control water tank 1. By using the second connecting block 18, multiple output pipes 17 can be connected to multiple microchannel pipes 2, thereby facilitating the external transport of the produced chloropropionic acid.

[0026] Each microchannel pipe 2 has a convex tube 3 fixedly connected to its outer surface, and a baffle cylinder 4 fixedly connected to its outer surface. Each baffle cylinder 4 has a rotatably connected baffle spiral fan blade 6 inside. Each set of baffle spiral fan blades 6 has equidistantly arranged circumferentially arranged limiting moving rods 5 fixedly connected to its outer surface. Several sets of limiting moving rods 5 are slidably connected to the interiors of several baffle cylinders 4. Each microchannel pipe 2 has a waterproof solenoid valve 7 fixedly connected to its outer surface. The waterproof solenoid valve 7 is an electromagnetically controlled and waterproof industrial device used to control fluid flow. The basic components of automation belong to the actuator category. The waterproof solenoid valve 7 is model TMFK51-15MB. The input end of each waterproof solenoid valve 7 is fixedly connected to a water spray pipe 8. The top end of each water spray pipe 8 passes through the cooling temperature control water tank 1 and extends to the top of the cooling temperature control water tank 1. The input end of each water spray pipe 8 is fixedly connected to a water supply pipe 19. The input ends of several water supply pipes 19 are fixedly connected to an extension main pipe 20. Through the water supply pipes 19, multiple water spray pipes 8 can be extended outward, and through the extension main pipe 20, multiple water supply pipes 19 can be connected together.

[0027] The input end of the extension main pipe 20 is fixedly connected to a gear pump 21. The gear pump 21 is a rotary pump that transports or pressurizes liquid by means of the change and movement of the working volume formed between the pump cylinder and the meshing gear. The model of the gear pump 21 is KCB / 2CY. The bottom surface of the gear pump 21 is fixedly connected to the upper surface of the cooling temperature control water tank 1. With the power provided by the gear pump 21, the extension main pipe 20 and multiple water supply pipes 19 can deliver high-pressure flushing dilution water into multiple water spray pipes 8 to flush multiple microchannel pipes 2.

[0028] A connecting pipe 12 and a circulating water pump 9 are fixedly connected to the front and back of the cooling water tank 1, respectively. The circulating water pump 9 is a pump that circulates water continuously within the system, overcoming loop resistance losses, and is not directly related to the building height. The model of the circulating water pump 9 is CZW-80-160. The front of the circulating water pump 9 is fixedly connected to the back of the cooling water tank 1, and the input end of the circulating water pump 9 is fixedly connected to a connecting pipe 10. The input end of the connecting pipe 10 and the connecting pipe 12... The output end is fixedly connected to a chiller 11. The chiller 11 is a machine that transfers the heat of a cooled object with a low temperature to the ambient medium to obtain cooling capacity. The model of the chiller 11 is KM1-BY-3WC. An extension plate 22 is fixedly connected to the right side of the cooling temperature control water tank 1. The bottom surface of the chiller 11 is fixedly connected to the upper surface of the extension plate 22. The extension plate 22 can be used to connect the chiller 11 to the cooling temperature control water tank 1, thereby improving the working stability of the chiller 11.

[0029] A support and reinforcement rod 23 is fixedly connected to the upper surface of the extension plate 22. The top end of the support and reinforcement rod 23 is fixedly connected to the outer surface of the connecting pipe 12. By using the support and reinforcement rod 23, the connecting pipe 12 can be supported and fixed on the upper surface of the extension plate 22, thereby improving the support stability of the connecting pipe 12.

[0030] The working principle of this utility model is as follows: When in use, the waterproof solenoid valve 7, circulating water pump 9, refrigeration unit 11, quantitative input control box 15 and gear pump 21 are first connected to the power supply. When it is necessary to use the microchannel reactor to process chloropropionic acid, the microchannel reactor is first placed on a horizontal ground by hand so that the cooling temperature control water tank 1, quantitative input control box 15 and extension plate 22 are in contact with the upper surface of the horizontal ground, so that the microchannel reactor can be stably set in the required position to process chloropropionic acid.

[0031] Next, external cooling water is manually transported to the circulating cooling structure of the microchannel reactor through the pipes on the chiller 11. By controlling the power supply of the circulating water pump 9 and the chiller 11, the power provided by the circulating water pump 9 can be used to circulate the cooling water in the circulating cooling structure. The chiller 11 can be used to cool and lower the temperature of the circulating high-temperature cooling water, which is then transported to the low-temperature cooling water tank 1 to reduce the temperature in the multiple microchannel pipes 2. By manually connecting the input end of the gear pump 21 to the flushing dilution water pipe, the power supply of the waterproof solenoid valve 7 can be controlled to close the connection between the spray pipe 8 and the microchannel pipe 2. The power provided by the gear pump 21 can be used to transport external flushing dilution water to the spray pipe 8, the water supply pipe 19 and the extension main pipe 20.

[0032] Then, the raw materials for processing chloropropionic acid are manually transported through the input pipe 16, input pipe 14, and quantitative input control box 15 into the microchannel pipe 2 for flow reaction. When passing through the quantitative input control box 15, the amount of chloropropionic acid raw material transported into the microchannel pipe 2 can be controlled by weighing, thus facilitating quantitative processing of the chloropropionic acid reaction within the microchannel pipe 2. The heat generated by the reaction is carried away by low-temperature cooling water in the cooling temperature control tank 1. During the flow reaction of the chloropropionic acid raw material in the microchannel pipe 2, the flow rate is changed by the convex pipe 3, resulting in more uniform mixing of the chloropropionic acid raw material. This also causes the chloropropionic acid raw material to pass through the turbulent spiral fan blades 6 inside the turbulent cylinder 4. This not only drives the turbulent spiral fan blades 6 to rotate inside the turbulent cylinder 4, but also causes the limiting moving rod 5 to slide inside the turbulent cylinder 4, forming a turbulent device. This changes the flow rate of the chloropropionic acid raw material and further improves the mixing reaction effect of the chloropropionic acid raw material. At the same time, by controlling the waterproof solenoid valve 7 and the gear pump 21, the flushing dilution water can be delivered to the microchannel pipeline 2 through the water spray pipe 8 to dilute the chloropropionic acid raw material and accelerate its flow rate. This can reduce the problem of blockage in the microchannel reactor, and the flushing dilution water can also be used to flush and clean the inside of the microchannel reactor.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] 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 microchannel reactor for the production of chloropropionic acid, comprising a cooling and temperature-controlled water tank (1), characterized in that: The inner wall of the cooling temperature control water tank (1) is fixedly connected with microchannel pipes (2) arranged at equal intervals. The outer surface of each microchannel pipe (2) is fixedly connected with a convex pipe (3). The outer surface of each microchannel pipe (2) is fixedly connected with a baffle cylinder (4). The interior of each baffle cylinder (4) is rotatably connected with a baffle spiral fan blade (6). The outer surface of each group of baffle spiral fan blades (6) is fixedly connected with a circumferentially arranged limiting moving rod (5). Several groups of limiting moving rods (5) are slidably connected to the interior of several baffle cylinders (4). The outer surface of each microchannel pipe (2) is fixedly connected with a waterproof Solenoid valve (7), the input end of each of the waterproof solenoid valves (7) is fixedly connected to a water spray pipe (8), the top end of each of the water spray pipes (8) passes through the cooling temperature control water tank (1) and extends to the top of the cooling temperature control water tank (1), the front and back of the cooling temperature control water tank (1) are respectively fixedly connected to a connecting pipe (12) and a circulating water pump (9), the front of the circulating water pump (9) is fixedly connected to the back of the cooling temperature control water tank (1), the input end of the circulating water pump (9) is fixedly connected to a connecting pipe (10), the input end of the connecting pipe (10) and the output end of the connecting pipe (12) are both fixedly connected to a refrigeration unit (11).

2. The microchannel reactor for chloropropionic acid production according to claim 1, characterized in that: Each of the microchannels (2) has an input pipe (14) fixedly connected to its input end. The outer surfaces of several input pipes (14) are fixedly connected to a first connecting block (13). The right side of the first connecting block (13) is fixedly connected to the left side of the cooling temperature control water tank (1).

3. The microchannel reactor for chloropropionic acid production according to claim 2, characterized in that: The left side of the first connecting block (13) is fixedly connected to a quantitative input control box (15). The input end of each input pipe (14) is fixedly connected to an input bucket (16). The input end of each input bucket (16) passes through the quantitative input control box (15) and extends to the top of the quantitative input control box (15).

4. The microchannel reactor for chloropropionic acid production according to claim 1, characterized in that: Each of the water spray pipes (8) has a fixed connection to a water supply pipe (19) at its input end, and the input ends of several of the water supply pipes (19) are fixedly connected to an extension main pipe (20).

5. The microchannel reactor for chloropropionic acid production according to claim 4, characterized in that: The input end of the extension manifold (20) is fixedly connected to a gear pump (21), and the bottom surface of the gear pump (21) is fixedly connected to the upper surface of the cooling temperature control water tank (1).

6. The microchannel reactor for chloropropionic acid production according to claim 1, characterized in that: Each of the microchannels (2) has an output pipe (17) fixedly connected to its output end. The outer surfaces of several output pipes (17) are fixedly connected to a second connecting block (18). The left side of the second connecting block (18) is fixedly connected to the right side of the cooling temperature control water tank (1).

7. The microchannel reactor for chloropropionic acid production according to claim 1, characterized in that: An extension plate (22) is fixedly connected to the right side of the cooling temperature control water tank (1), and the bottom surface of the refrigeration unit (11) is fixedly connected to the upper surface of the extension plate (22).

8. The microchannel reactor for chloropropionic acid production according to claim 7, characterized in that: The upper surface of the extension plate (22) is fixedly connected to a support rod (23), and the top end of the support rod (23) is fixedly connected to the outer surface of the connecting pipe (12).

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