A three-dimensional plug flow microcapsule reaction device and its application

Abstract

The present invention provides a three-dimensional plug flow microcapsule reaction device, comprising a motor, a reducer, a core shaft, a propulsion system, a microcapsule reaction group, a heating system, a cooling system, a head assembly, a circulation reflux system, a vacuum degassing system, and a reaction auxiliary agent supply system; the three-dimensional plug flow microcapsule reaction device provided by the present invention is applied to the polymerization reaction of thermoplastic polymer materials, and can realize product separation while reaction, and the product (with higher viscosity) that meets the polymerization degree requirement is quickly separated and extruded under the action of centrifugal force, and the remaining reactants (with lower viscosity) are continuously fed into the microcapsule reaction space formed at the mating surface of the centrifugal moving disk and the fixed disk to continue the polymerization reaction, and are gradually separated during the continuous polymerization reaction process. The microcapsule reaction space ensures that the molecular weight distribution range of the product is extremely narrow, and has the advantages of high yield, few side reactions, small amount of auxiliary agents, high product purity, simple post-processing, etc., effectively improving the performance of the polymer.

Description

Technical Field

[0001] The invention belongs to the field of reaction devices, and in particular relates to a three-dimensional plug flow microcapsule reaction device and application thereof. Background Art

[0002] Traditional thermoplastic polymer polymerization reactors mainly include batch reactors, fully mixed flow reactors, plug flow reactors, and microchannel reactors. Before the batch reactor is put into operation, the materials are added to the reactor once or multiple times according to a certain ratio. During a single reaction, no materials enter or exit the reactor. After the reaction is completed, the materials are taken out all at once. Because the reaction is accompanied by stirring, the parameters (such as temperature, concentration, etc.) at each point in the reactor space are basically the same, which can eliminate the effects of mass transfer and heat transfer on the reaction. However, these parameters will change with the reaction time. The advantages of batch reactors are high operational flexibility and flexibility, and a wide variety of products that can be produced. They are mainly suitable for products with long reaction times, high economic value, and small batches. The disadvantages are shallow reaction depth (after the reaction reaches dynamic equilibrium, the reaction cannot proceed in the forward direction), long auxiliary operation time, high labor intensity, and difficulty in consistent quality of each batch of products. Fully mixed flow reactors are a type of reactor that is widely used in industrial production processes. Their overall structure is very similar to that of batch reactors, except that fully mixed flow reactors have continuous feeding and discharging. Due to the high stirring rate, the material backmixing is extremely high at steady state, resulting in uniform temperature and concentration at all points within the reactor. Therefore, the material quickly reaches equilibrium upon entering the reactor, and the outlet material parameters are consistent with those of the full reactor. Advantages of fully mixed flow reactors include ease of operation, ease of control, labor savings, and high product yields. However, they also suffer from inefficient gas-solid contact and complete mixing of particles, leading to backmixing and dilution, which can affect reaction conversion and selectivity. Plug flow reactors are another common type of reactor used in the chemical industry, alongside batch reactors and fully mixed flow reactors. This type of reactor is characterized by uniform material residence time within the reactor, with all material parameters remaining constant along the radial cross-section but varying along the axial direction. Plug flow reactors offer advantages such as small size, high pressure resistance, large heat transfer area, high processing efficiency, ease of operation, and amenability to automation. However, they are generally designed for specific reaction conditions, such as temperature, pressure, and material properties. Even slight variations in these conditions can affect reactor performance. Therefore, different types of polymerization reactions may require different plug flow reactor designs, further increasing operational complexity and cost. A microchannel reactor is a reactor that can carry out chemical reactions within a lateral dimension of less than 1 mm. This structure is called a microchannel reactor because of its small, continuous reaction space. Microchannel reactors can operate continuously, enabling the continued reaction of unstable intermediates. In particular, low-temperature chemical reactions with reaction times measured in milliseconds or seconds no longer require hours of storage. This fast-operating unit prevents the degradation of valuable intermediates and allows for the control of polymer molecular weight distribution within a narrow range.Microchannel reactors offer advantages over conventional reaction equipment in many aspects, including high heat exchange efficiency, fast reaction speed, high yield, narrow molecular weight (degree of polymerization) distribution, good safety, good stability, and strong monitorability. Furthermore, they enable more refined control over production. However, microchannel reactors are very small, and scaling up to the required industrial quantity would require stacking a large number of them, which is costly. Furthermore, once the reaction products reach dynamic equilibrium, there is no way to separate products with different degrees of polymerization. Traditional microchannel reactors also suffer from problems such as clogging, pulsating flow, and corrosion. Summary of the Invention

[0003] (1) Technical issues to be resolved

[0004] In response to the shortcomings of the above-mentioned polymer material polymerization reactor technology, the present invention proposes a three-dimensional plug flow microcapsule reaction device and application. The three-dimensional plug flow microcapsule reaction device provided by the present invention combines the technical advantages of a fully mixed flow reactor, a plug flow reactor and a microchannel reactor, and overcomes the technical shortcomings of the microchannel reactor such as the inability to react and separate simultaneously, high cost, blockage, pulsating flow and corrosion. It is used for the continuous polymerization reaction of thermoplastic polymer materials, can achieve separation while reacting, and precise control of the polymerization degree distribution, and can obtain high-quality polymer materials with an extremely narrow molecular weight distribution.

[0005] (2) Technical solution

[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the present invention are as follows.

[0007] In one aspect, the present invention provides a three-dimensional plug flow microcapsule reaction device, comprising a propulsion system, a microcapsule reaction group, a head assembly, a heating system, a cooling system, and a frame;

[0008] Furthermore, the propulsion system is fixedly mounted on the frame and is used to continuously push the material to the microcapsule reaction group and the die assembly, and includes a motor, a reducer, a core shaft, a feed section assembly, and a discharge section assembly; the core shaft is provided with an involute spline, which is fixedly connected to the output shaft of the reducer; the feed section assembly includes a feed section barrel and a feed section conveying screw; the discharge section assembly includes a discharge section barrel and a discharge section conveying screw; the feed section conveying screw and the discharge section conveying screw are sleeved on both ends of the core shaft through involute splines and are respectively installed in the feed section barrel and the discharge section barrel;

[0009] Furthermore, the microcapsule reaction group is composed of a plurality of microcapsule reaction units; the microcapsule reaction units include a plurality of centrifugal moving disks, a fixed disk, and a reaction unit cylinder; the fixed disk is installed in the reaction unit cylinder; the centrifugal moving disk is installed in a coaxial annular inner groove at the center of the fixed disk, and is sleeved on the core shaft through an involute spline, rotating as the core shaft rotates; a plurality of microcapsule reaction spaces are formed at the mating surfaces of the centrifugal moving disk and the fixed disk;

[0010] Furthermore, the die head assembly is connected to the discharge section assembly for continuously extruding the crude product that meets the polymerization degree requirement;

[0011] Furthermore, the heating system is fixedly installed on the outside of the cylinder and is used to heat the reactants in the cylinder;

[0012] Furthermore, the cooling system is connected to the inner wall jackets of the feed section cylinder and the discharge section cylinder through pipelines, and is used to cool the reactants in the cylinder;

[0013] Furthermore, the frame is used to support the propulsion system and the microcapsule reaction group.

[0014] Furthermore, the feed section conveying screw and the discharge section conveying screw both adopt a gradient pitch design so that the crude product with higher viscosity that meets the polymerization degree requirements can be quickly separated from the reactants with lower viscosity through centrifugal force, and the crude product that meets the polymerization degree requirements is pushed to the head assembly, and the reactants are sent into the microcapsule reaction space to continue the polymerization reaction.

[0015] Furthermore, the centrifugal moving disc is disc-shaped, with a plurality of fan-shaped blades on the outer ring of the disc surface, a boss in the center, an axial hole in the center, and axial through holes evenly opened in the circumferential direction of the outer side of the boss for the crude product that meets the polymerization degree requirement to flow to the head assembly; a plurality of first involute grooves are opened on both the upper and lower blade surfaces of the fan-shaped blades, and the plurality of first involute grooves are in the same direction and are evenly spaced;

[0016] Furthermore, the fixed plate is disc-shaped, with a circular through hole in the center, and the coaxial annular inner groove is processed along the center of the circular through hole; a plurality of fan-shaped grooves are provided on one side of the disk surface of the fixed plate, and the fan-shaped grooves are the same size and shape as the fan-shaped blades of the centrifugal movable plate, and are communicated with the coaxial annular inner groove, so that the centrifugal movable plate can be installed in the coaxial annular inner groove through the fan-shaped grooves; a plurality of second involute grooves are provided on the two opposite end surfaces of the coaxial annular inner groove, and the plurality of second involute grooves are in the same direction and are evenly arranged at intervals; a plurality of through holes are evenly provided in the circumferential direction of the outer edge of the fixed plate for positioning between the fixed plates.

[0017] Furthermore, the first involute groove and the second involute groove are both semicircular grooves with a diameter of 0.2 to 0.5 mm; the first involute groove on the centrifugal movable disk and the second involute groove on the fixed disk are in opposite directions, and cooperate to form the microcapsule reaction space at the intersection, which provides a reaction space for the reactants to continue the polymerization reaction; the crude products that meet the polymerization degree requirements synthesized in several of the microcapsule reaction spaces continuously flow to the head assembly through the axial through holes on the centrifugal movable disk, and the reactants continuously flow into several of the microcapsule reaction spaces to continue the polymerization reaction.

[0018] Furthermore, the three-dimensional plug flow microcapsule reaction device also includes a circulation reflux system, a vacuum degassing system and a reaction aid supply system; the circulation reflux system is respectively connected to the feed section assembly and the discharge section assembly, and is used to circulate the reactants from the reflux port to the feed port to continue to participate in the polymerization reaction; the vacuum degassing system is connected to the microcapsule reaction group, and is used to remove small molecular impurities generated during the reaction process; the reaction aid supply system is connected to the microcapsule reaction group, and is used to supply reaction aids.

[0019] Furthermore, the number of the vacuum degassing system and the reaction aid supply system is the same as or less than the number of the microcapsule reaction groups, and the specific number is determined according to the usage scenario and polymer type.

[0020] Furthermore, the microcapsule reaction group is assembled in a building block manner, and the number is increased or decreased according to the production scale and reaction requirements.

[0021] Furthermore, the feed section cylinder is provided with a feed port, and the discharge section cylinder is provided with a reflux port; the reaction unit cylinder is provided with a vacuum degassing port and / or a supply port; the feed section cylinder, the discharge section cylinder and the reaction unit cylinder are connected by flanges.

[0022] Furthermore, the propulsion system also includes an intermediate section component, which is arranged in the middle of the microcapsule reaction group and is used to further promote the flow of the crude product that meets the polymerization degree requirements and the reactants; the intermediate section component includes an intermediate section barrel and an intermediate section conveying screw.

[0023] On the other hand, the present invention provides an application of a three-dimensional plug flow microcapsule reaction device, wherein the three-dimensional plug flow microcapsule reaction device is used for polymerization reaction of thermoplastic polymer materials.

[0024] Furthermore, the continuous polymerization reaction of the thermoplastic polymer material includes solution polymerization, bulk polymerization, emulsion polymerization and aqueous emulsion polymerization.

[0025] (3) Beneficial effects

[0026] (1) In the three-dimensional plug flow microcapsule reaction device provided by the present invention, involute grooves in opposite directions are machined on the mating surfaces of the fixed disk and the centrifugal moving disk. When the centrifugal moving disk rotates, a number of microcapsule reaction spaces similar to T-type microchannel reactors are formed on the mating surfaces. The reaction spaces are continuously formed and opened, which can well meet the flow of materials and the mass transfer and heat transfer requirements of the reaction, and realize separation while reacting.

[0027] (2) The three-dimensional plug flow microcapsule reaction device provided by the present invention has a short reaction residence time of the monomers, very few side reactions, and stable process parameters. The molecular weight (that is, the degree of polymerization) of the polymer can be completely controlled within an extremely narrow range through the microcapsule reaction space, thereby obtaining a high-quality polymer material with an extremely narrow molecular weight distribution.

[0028] (3) The three-dimensional plug-flow microencapsulation reaction apparatus provided by the present invention can adjust process parameters (such as pressure, rotation speed, temperature, reaction residence time, reaction time, degree of polymerization, and separation coefficient) over a wide range. Equipment users can adjust process parameters based on the performance requirements of the end product, making operation and control convenient and greatly simplifying the production process.

[0029] (4) The three-dimensional plug flow microcapsule reaction device provided by the present invention has sufficient reaction, less transition material, high product purity and high yield; high utilization rate of reaction additives and small amount; mild reaction conditions, good mass and heat transfer between the equipment and materials, and easy control of the reaction process (vacuum degassing, reaction additive supply, feeding, reflux, etc.). BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural diagram of the three-dimensional plug flow microcapsule reaction device.

[0031] 1—motor; 2—reducer; 3—core shaft; 4—feed section barrel; 5—feed section conveying screw; 6—reaction unit barrel; 7—centrifugal moving plate; 8—fixed plate; 9—discharge section conveying screw; 10—discharge section barrel; 11—die assembly; 12—frame; 13—heater; 14—feed port; 15—return port.

[0032] Figure 2 This is a structural diagram of the centrifugal disk of the three-dimensional plug flow microcapsule reaction device.

[0033] Figure 3 Schematic diagram of the involute grooves on the fan-shaped blades of the centrifugal disk.

[0034] Figure 4 This is a diagram of the fixed plate structure of the three-dimensional plug flow microcapsule reaction device.

[0035] Figure 5Schematic diagram of the involute groove on the end face of the annular inner groove in the center of the fixed disk.

[0036] Figure 6 This is the working flow diagram of the three-dimensional plug flow microcapsule reaction device. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] like Figure 1As shown, the three-dimensional plug-flow microencapsulation reaction device consists of a propulsion system, a microencapsulation reaction group, a die assembly, a heating system, a cooling system, a circulation reflux system, a vacuum degassing system, a reaction aid supply system, and a frame. The propulsion system is fixedly mounted on the frame and includes a motor, a reducer, a core shaft, a feed section assembly, and a discharge section assembly. It is used to push the crude product that has reached the required degree of polymerization into the discharge section assembly and continuously push other reactants into the microencapsulation reaction group. The core shaft is provided with an involute spline fixedly connected to the output end of the reducer. The feed section assembly includes a feed section barrel and a feed section conveying screw. The discharge section assembly includes a discharge section barrel and a discharge section conveying screw. The feed section conveying screw and the discharge section conveying screw are respectively mounted on the two ends of the core shaft via involute splines and installed in the feed section barrel and the discharge section barrel. The feed section cylinder is provided with a feed port, the discharge section cylinder is provided with a reflux port; the reaction unit cylinder is provided with a vacuum degassing port and / or a supply port.

[0041] The conveying screws in the feed section and the discharge section both adopt a gradient pitch design so that the crude product with higher viscosity that meets the polymerization degree requirements can be quickly separated from the reactants with lower viscosity through centrifugal force, and the crude product that meets the polymerization degree requirements is pushed to the head assembly for extrusion, while the remaining other reactants are sent to the microcapsule reaction unit to continue the polymerization reaction.

[0042] The microcapsule reaction group consists of several microcapsule reaction units; the microcapsule reaction unit consists of a reaction unit cylinder and several centrifugal moving discs and fixed discs installed therein; the fixed disc is installed in the reaction unit cylinder, and the centrifugal moving disc is installed in the coaxial annular inner groove at the center of the fixed disc, and is mounted on the core shaft through an involute spline and rotates as the core shaft rotates.

[0043] like Figure 2 As shown, the outer ring of the centrifugal moving disk is composed of a number of fan-shaped blades, the central part of which is a boss with an axial hole in the center. Axial through holes are evenly opened in the circumferential direction of the outer side of the boss, and the crude product that meets the polymerization degree requirement is pushed to the head assembly through the axial through holes and extruded from the head assembly; the upper and lower blade surfaces of the fan-shaped blades are both provided with first involute grooves, which are in the same direction and are evenly spaced. Figure 3 shown.

[0044] like Figure 4 As shown, the fixed plate is disc-shaped, with a circular through hole in the center, and a coaxial annular inner groove is machined along the center of the circular through hole; a plurality of fan-shaped grooves are provided on one side of the fixed plate, and the fan-shaped grooves are the same size and shape as the fan-shaped blades of the centrifugal movable plate, and are connected to the coaxial annular inner groove; the centrifugal movable plate is installed in the coaxial annular inner groove through the fan-shaped grooves, and the fan-shaped blades of the centrifugal movable plate form matching surfaces with the upper and lower end surfaces of the coaxial annular inner groove; a plurality of second involute grooves are provided on the two opposite annular end surfaces of the coaxial annular inner groove, and the second involute grooves are in the same direction and are evenly spaced, as shown in FIG. Figure 5 As shown, the first and second involute grooves are both semicircular grooves with a diameter of 0.2 to 0.5 mm. The first and second involute grooves run in opposite directions and intersect with each other, forming a plurality of microcapsule reaction spaces at the mating surface of the centrifugal moving disk and the fixed disk. As the centrifugal moving disk rotates with the core shaft, the microcapsule reaction spaces at the mating surface alternately form and open, continuously providing reaction space for reactants to undergo polymerization reactions, thereby obtaining a crude product with a desired degree of polymerization. The crude product synthesized in the plurality of microcapsule reaction spaces continuously flows through the axial through-holes in the centrifugal moving disk to the die assembly, while other reactants continuously flow into the plurality of microcapsule reaction spaces for further polymerization reactions. Due to the small size and wide distribution of the microcapsule reaction spaces, heat transfer is fast, reactant distribution is uniform, reaction residence time is short, side reactions are minimal, and process parameters are stable, enabling the molecular weight of the polymer to be controlled within a very narrow range, resulting in a high-quality polymer material with an extremely narrow molecular weight distribution.

[0045] In addition, a plurality of through holes are evenly arranged in the circumferential direction of the outer edge of the fixed plate for positioning between the fixed plates. After the fixed plates are connected and positioned by long positioning pins, radial keyways are opened at the end of the cylinder and the outer circle of the fixed plate near the end of the cylinder, and the fixed plate and the cylinder are radially positioned by a spherical key or a flat key.

[0046] The die assembly is connected to the discharge section assembly and is used to continuously extrude a crude product that meets the required degree of polymerization. The die assembly includes a hydraulic screen-changing mechanism, a die connector, a discharging plate, a heater, a pressure sensor, and a temperature controller. The hydraulic screen-changing mechanism is flange-mounted between the die connector and the discharge section barrel and is used to filter trace mechanical impurities from the crude product that meets the required degree of polymerization obtained through the polymerization reaction. The discharging plate and die connector are bolted together. If the polymerization reaction is bulk polymerization, the product extruded from the die assembly can be directly cooled and shaped. If the polymerization reaction is other liquid-phase polymerization reactions, the product extruded from the die assembly must undergo a devolatilization process to remove solvents, water, residual monomers, by-products, etc. The removed solvent can be recycled to the next polymerization reaction section.

[0047] The heating system is fixedly mounted on the outside of the cylinder and is used to heat the reactants inside. It includes a heater body, power connection column, outer insulation layer, temperature sensor, and thermostat. The heater body is made of a pair of semicircular or square rings of metal heat-conducting material, which snap together on the outside of the cylinder to form a circular or square heating element. The heater body is surrounded by an outer insulation layer. The thermostat controls the heating system's on / off and temperature, achieving a temperature control error of 0.2-0.5°C.

[0048] The cooling system connects the inner jackets of the feed section, reaction unit, and discharge section cylinders via pipes, cooling the reactants within. The cooling system includes solenoid valves, manual shutoff valves, pipes, fittings, a condensate circulation pump, a shell-and-tube heat exchanger, a soft water tank, thermocouples, a thermostat, and a pressure gauge.

[0049] The reflux system includes pipe fittings, pipe sections, and a metering pump. These pipe fittings and sections connect the metering pump to the feed port on the feed section and the discharge port on the discharge section. Flanges connect these components. The metering pump at the reflux port of the discharge section pumps the reactants back to the feed port of the feed section to continue the polymerization reaction.

[0050] The vacuum degassing system includes a supporting connecting pipe, pipe sections, pipe fittings, a buffer tank, and a water ring vacuum pump. The vacuum degassing system is connected to the microcapsule reaction group through a connection port machined on the reaction unit cylinder to remove small molecular impurities generated during the reaction process.

[0051] The reaction additive supply system is connected to the microcapsule reaction unit and is used to replenish reaction additives. Powder additives are replenished through a dual-stage twin-screw side feeder directly installed through the supply port on the reaction unit barrel. Liquid additives are replenished by drilling screw holes directly into the reaction unit barrel, connecting them to pipelines using threads, and injecting liquid additives using a metering pump.

[0052] The workflow and connection relationship of the three-dimensional plug flow reaction device are as follows Figure 6 shown.

[0053] The number of vacuum degassing systems and reaction aid supply systems can be consistent with the number of microcapsule reaction units, or less than the number of microcapsule reaction units. The specific number is determined according to the usage scenario and polymer type. The microcapsule reaction units are assembled in a building block style, and the number is increased or decreased according to different production scales and reaction requirements, so that the application range of the device is further expanded. The feed section barrel, the discharge section barrel and the reaction unit barrel are connected by flanges to connect the propulsion system and the microcapsule reaction group to form a closed reaction system. In addition, according to the reaction requirements, the propulsion system and the microcapsule reaction group can be flexibly combined. The propulsion system not only includes the feed section assembly and the discharge section assembly installed at both ends of the microcapsule reaction group, but also includes an intermediate section assembly clamped in the microcapsule reaction group. The barrel and conveying screw included in the intermediate section assembly have the same structure as the feed section assembly and the discharge section assembly.

[0054] The three-dimensional plug flow microcapsule reaction device provided by the present invention is used for continuous polymerization reactions of thermoplastic polymer materials. The reaction medium is not limited and can be used for solution polymerization, bulk polymerization, emulsion polymerization, and aqueous emulsion polymerization reactions. The microcapsule reaction space can limit the degree of polymerization of the polymer to an extremely narrow distribution range, and the polydispersity index (PDI) of the polymer can be controlled between 1 and 2. Using the three-dimensional plug flow microcapsule reaction device provided by the present invention, high-quality polymers with a degree of polymerization of 5,000 to 600,000 can be obtained.

Claims

1. A three-dimensional plug flow microcapsule reaction device, characterized in that: It includes propulsion system, microcapsule reaction group, head assembly, heating system, cooling system and frame; The propulsion system is fixedly mounted on the frame and is used to continuously push the reaction materials to the microcapsule reaction group and the die assembly, and includes a motor, a reducer, a core shaft, a feed section assembly, and a discharge section assembly; the core shaft is provided with an involute spline, which is fixedly connected to the output shaft of the reducer; the feed section assembly includes a feed section barrel and a feed section conveying screw; the discharge section assembly includes a discharge section barrel and a discharge section conveying screw; the feed section conveying screw and the discharge section conveying screw are sleeved on both ends of the core shaft via involute splines and are respectively mounted in the feed section barrel and the discharge section barrel; The microcapsule reaction group is composed of a plurality of microcapsule reaction units; the microcapsule reaction units include a plurality of centrifugal moving disks, a fixed disk, and a reaction unit cylinder; the fixed disk is installed in the reaction unit cylinder; the centrifugal moving disk is installed in a coaxial annular inner groove at the center of the fixed disk, and is sleeved on the core shaft through an involute spline, rotating as the core shaft rotates; a plurality of microcapsule reaction spaces are formed at the mating surfaces of the centrifugal moving disk and the fixed disk; The centrifugal moving disc is disc-shaped, with a plurality of fan-shaped blades on the outer ring of the disc surface, a boss in the center, and an axial hole in the center. Axial through holes are evenly opened in the circumferential direction of the outer side of the boss to provide a channel for the crude product that meets the polymerization degree requirement to flow to the head assembly; a plurality of first involute grooves are formed on the upper and lower blade surfaces of the fan-shaped blades, and the plurality of first involute grooves are in the same direction and are evenly spaced. The fixed plate is disc-shaped, with a circular through hole in the center, and the coaxial annular inner groove is processed along the center of the circular through hole; a plurality of fan-shaped grooves are formed on one side of the plate surface of the fixed plate, and the fan-shaped grooves are the same size and shape as the fan-shaped blades of the centrifugal movable plate, and are connected to the coaxial annular inner groove, so that the centrifugal movable plate can be installed in the coaxial annular inner groove through the fan-shaped grooves; a plurality of second involute grooves are formed on both opposite end surfaces of the coaxial annular inner groove, and the plurality of second involute grooves are in the same direction and are evenly spaced; a plurality of through holes are evenly formed in the circumferential direction of the outer edge of the fixed plate for positioning the fixed plates; The die head assembly is connected to the discharge section assembly and is used to continuously extrude the crude product that meets the polymerization degree requirement; The heating system is fixedly mounted on the outside of the cylinder and is used to heat the reaction material; The cooling system is connected to the inner wall jacket of the feeding section cylinder / the discharging section cylinder / the reaction unit cylinder, and is used to cool the reaction materials; The frame is used to support the propulsion system and the microcapsule reaction group.

2. The three-dimensional plug flow microcapsule reaction device according to claim 1, characterized in that: The feed section conveying screw and the discharge section conveying screw both adopt a gradient pitch design so that the crude product with higher viscosity that meets the polymerization degree requirement can be quickly separated from the reaction material with lower viscosity through centrifugal force, and the crude product that meets the polymerization degree requirement is pushed to the head assembly, and the reaction material is sent into the microcapsule reaction space to continue the polymerization reaction.

3. The three-dimensional plug flow microcapsule reaction device according to claim 1, characterized in that: The first involute groove and the second involute groove are both semicircular grooves with a diameter of 0.2 to 0.5 mm. The first involute groove on the centrifugal movable disk and the second involute groove on the fixed disk are in opposite directions, and cooperate to form the microcapsule reaction space at the intersection thereof. The microcapsule reaction space provides a reaction space for the reactants to continue the polymerization reaction. The crude products synthesized in the plurality of microcapsule reaction spaces and meeting the polymerization degree requirements continuously flow to the die assembly through the axial through-holes on the centrifugal movable disk, and the reactants continuously flow into the plurality of microcapsule reaction spaces to continue the polymerization reaction.

4. The three-dimensional plug flow microcapsule reaction device according to claim 1, characterized in that: The three-dimensional plug flow microcapsule reaction device also includes a circulation reflux system, a vacuum degassing system and a reaction auxiliary agent supply system; The circulation reflux system is connected to the feed section assembly and the discharge section assembly respectively, and is used to circulate the reactants from the discharge section assembly back to the feed section assembly to continue participating in the polymerization reaction; The vacuum degassing system is connected to the microcapsule reaction group and is used to remove small molecular impurities generated during the reaction; The reaction aid supply system is connected to the microcapsule reaction group and is used for supplying the reaction aid.

5. The three-dimensional plug flow microcapsule reaction device according to claim 4, characterized in that: The number of the vacuum degassing system and the reaction aid supply system is the same as or less than the number of the microcapsule reaction groups, and the specific number is determined according to the usage scenario and polymer type.

6. The three-dimensional plug flow microcapsule reaction device according to claim 1, characterized in that: The microcapsule reaction group is assembled in a building block manner, and the number is increased or decreased according to the production scale and reaction requirements.

7. The three-dimensional plug flow microcapsule reaction device according to claim 1, characterized in that: The feed section cylinder is provided with a feed port, and the discharge section cylinder is provided with a reflux port; the reaction unit cylinder is provided with a vacuum degassing port and / or a supply port; the feed section cylinder, the discharge section cylinder and the reaction unit cylinder are connected by flanges.

8. The three-dimensional plug flow microcapsule reaction device according to claim 1, characterized in that: The propulsion system further includes an intermediate section component, which is arranged in the middle of the microcapsule reaction group and is used to further propel the flow of the crude product that has reached the polymerization degree requirement and the reactants; the intermediate section component includes an intermediate section barrel and an intermediate section conveying screw.

9. Use of the three-dimensional plug flow microcapsule reaction device according to any one of claims 1 to 8, characterized in that: Used for continuous polymerization of thermoplastic polymer materials; the continuous polymerization of thermoplastic polymer materials includes solution polymerization, bulk polymerization, emulsion polymerization and aqueous emulsion polymerization.

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