TGIC high-efficiency devolatilization and melt extrusion granulation integrated device

Abstract

This application discloses a TGIC high-efficiency devolatilization and melt extrusion granulation integrated device, comprising a twin-screw extruder, a distribution die, and a steel strip forming machine. The twin-screw extruder barrel is provided with a main feed port at one end and a discharge port at the other end. The twin-screw extruder barrel is provided with at least three exhaust zones, each of which is provided with a vacuum port connected to a vacuum pump system via a pipeline. A side feed port is also provided on the twin-screw extruder barrel between the last vacuum port and the discharge port. The discharge port of the twin-screw extruder is connected to the distribution die, and the outlet of the distribution die is connected to the steel strip forming machine. This application has the advantages of high-efficiency devolatilization, continuous production, a high degree of automation, a safe and environmentally friendly production process, low energy consumption, and high production capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of triglycidyl isocyanurate (TGIC) granulation, and in particular to an integrated device for high-efficiency devolatilization and melt extrusion granulation of TGIC. Background Art

[0002] Triglycidyl isocyanurate (TGIC) is a crystalline heterocyclic epoxy compound. Its three active epoxy groups can undergo cross-linking reactions with the hydroxyl groups in polyester resins. Due to its excellent heat resistance, weather resistance, corrosion resistance, chemical resistance, and mechanical properties, TGIC is widely used as a cross-linking curing agent in polyester resin or acrylic resin powder coatings. It can also be used in structural materials, electrical insulation materials, printed circuit boards, modified epoxy resins, high-efficiency adhesives and other fields.

[0003] The existing TGIC production process generally includes: (1) condensation reaction of cyanuric acid and epichlorohydrin in the presence of a catalyst and at a certain temperature; (2) lowering the temperature and adding alkali for epoxidation to produce triglycidyl isocyanurate; (3) washing and vacuum distillation to recover excess raw materials; (4) adding alcohol to crystallize it and drying it to obtain the finished product.

[0004] During the TGIC production process, an excess of epichlorohydrin is typically added to ensure a smooth condensation reaction. However, residual epichlorohydrin in the TGIC product can be irritating to human skin and affect the curing efficiency and coating performance of the product. Therefore, epichlorohydrin is removed and recovered by distillation after the reaction. For example, JP-B-45-22751 uses a rotary evaporator to remove epichlorohydrin, US Pat. No. 4,395,542 uses a multi-stage stripping tower to remove epichlorohydrin through multi-stage stripping, and CN102174040A uses reduced pressure distillation combined with a high-vacuum thin-film evaporator to remove epichlorohydrin. These traditional methods all employ high-vacuum, high-temperature distillation to remove residual epichlorohydrin. The distillation process requires temperatures of 100-120°C and requires 3-6 hours of distillation time, requiring significant energy consumption and increasing production costs. Furthermore, the product is susceptible to polymerization explosion hazards at high temperatures, making it difficult to achieve the desired results. Controlling the content of epichlorohydrin in TGIC products to below 100 ppm, especially below 50 ppm, is an urgent problem that needs to be solved in order to improve the safety and performance of TGIC products and expand the application areas of TGIC.

[0005] Alternatively, TGIC solution can be crystallized using alcohols such as methanol or ethanol to produce a powdered form of TGIC containing approximately 15-25% methanol or ethanol, known as wet powder. The production process also requires drying to remove the alcohol, followed by extrusion and granulation for easy packaging and transportation.

[0006] CN201420188579.4 and CN201410155719.2 disclose a triglycidyl isocyanurate dry powder extrusion granulation production line and production process, including a vibration dryer, a condenser connected to the gas outlet of the vibration dryer, a solvent recovery tank and a gas induced draft fan I connected in turn to the condenser; a dry powder cyclone separator and a dry powder tank connected to the material outlet of the vibration dryer, and the discharge port of the dry powder tank connected in turn to a material extruder, a tablet press, a belt cooling conveyor, a crusher, a screening machine and a packaging machine.

[0007] CN201110443507.0 uses microwave heating to volatilize the methanol in the TGIC. During heating, the entire oven is under negative pressure, and the volatilized methanol gas enters the methanol recovery system. The selective heating of the product by microwaves ensures uniform heating of the TGIC during the drying process, eliminating issues such as material agglomeration and amorphous materials found in traditional processes. The volatilized methanol gas is cooled by three condensers, and 95% of the methanol is recovered.

[0008] CN201010108286.7 discloses a process and production line for the melt granulation of triglycidyl isocyanurate. A still performs atmospheric and vacuum distillation at different temperatures. After the organic solvent is completely evaporated, the material in the still is evenly placed on a belt cooling conveyor for cooling before being crushed and screened. The production line consists of a still, a condenser, an organic solvent recovery tank, a vacuum pump, a belt cooling conveyor below the still, a crusher, a screener, and a packaging machine.

[0009] CN201310000785.8 discloses a novel TGIC drying and granulation device, comprising a feeding kettle and a feeding device disposed at the lower end of the feeding kettle. The feeding device is connected to an extruder, which is provided with a plurality of vacuum outlets, the ends of which are connected to a melt pump and a die head. This drying device can improve drying efficiency.

[0010] In the above-mentioned traditional TGIC wet powder extrusion granulation process, the drying equipment is complex and the drying process takes a long time. In addition, the physical extrusion granulation results in uneven particle density and severe powder shedding, which causes great trouble to the packaging and transportation of TGIC. Summary of the Invention

[0011] The purpose of this application is to solve the problems of low epichlorohydrin distillation efficiency and high residue in TGIC products, long alcohol drying process equipment and time, powder shedding and low production efficiency in physical extrusion granulation, and to provide a TGIC high-efficiency devolatilization and melt extrusion granulation integrated device.

[0012] The present application provides a TGIC high-efficiency devolatilization and melt extrusion granulation integrated device, which adopts the following technical solutions:

[0013] A TGIC high-efficiency devolatilization and melt extrusion granulation integrated device comprises a twin-screw extruder, a melt pump, a distribution die, and a steel strip forming machine. A main feed port is provided at one end of the twin-screw extruder barrel, and a discharge port is provided at the other end. The twin-screw extruder barrel is provided with at least three exhaust zones, each of which is provided with a vacuum port connected to a vacuum pump system via a pipeline. A side feed port is also provided on the twin-screw extruder barrel between the last vacuum port and the discharge port. A melt pump is provided between the discharge port of the twin-screw extruder and the distribution die, and a steel strip forming machine is arranged downstream of the outlet of the distribution die.

[0014] The above technical solution adds material to the main feed port, melts it in the feed melting zone, and conveys it to the discharge port via a twin-screw extruder. By providing at least three degassing zones, multiple devolatilizations are performed during the material conveying process, and different substances can be devolatilized and collected by controlling different pressures. The material passes through the degassing zones and is connected to a vacuum pump system via vacuum ports in the degassing zones. Volatilized substances released from the melted material are discharged and collected by the vacuum pump system. The devolatilized TGIC melt is uniformly formed into spherical liquids through the distribution die head, dripping onto a forming steel belt. The temperature control mechanism on the steel belt forming machine cools and crystallizes the TGIC droplets, forming granules. This solution offers advantages such as high granulation density and high production efficiency. By adding TGIC dry powder, from which epichlorohydrin and alcohols have been removed, to the side feed port between the last vacuum port and the discharge port, this powder serves as a seed for TGIC crystallization, accelerating TGIC crystallization and shortening the curing and granulation time, thereby improving granulation production efficiency.

[0015] Optionally, the aspect ratio of the twin-screw extruder screw is 48-72D.

[0016] The above technical solution can avoid the situation where the aspect ratio of the twin-screw extruder screw is too small, resulting in the inability to complete melting and multiple vacuum degassing operations. It can also avoid the situation where the aspect ratio of the twin-screw extruder screw is too large, resulting in a long heating process of TGIC in the extruder, which is easy to cause the ring opening of some epoxy groups, resulting in reduced product activity and yield.

[0017] Optionally, a side feeding port is further provided on the barrel of the twin-screw extruder, and the side feeding port is provided between any two vacuum degassing zones.

[0018] Through the above technical solution, a side feeding port is provided between any two exhaust zones, and multiple feeding of TGIC wet powder is performed from the side feeding port, which can further increase the output and reduce the problem of uneven melting and plasticization caused by centralized feeding.

[0019] Optionally, a gas injection port is further provided on the barrel of the twin-screw extruder, and the gas injection port is provided between the second vacuum port and the third vacuum port.

[0020] Through the above technical solution, low-boiling-point inert compounds such as water, nitrogen, carbon dioxide, etc. can be injected from the gas injection port, which has a carrying effect on the small molecular components to be removed from the material, thereby improving the devolatilization effect.

[0021] Optionally, the steel strip forming machine includes a forming steel strip and a temperature control system for controlling the surface of the forming steel strip. A scraper is provided at the discharge end of the forming steel strip, and the scraper contacts the surface of the forming steel strip.

[0022] Through the above technical solution, the temperature of the surface of the formed steel strip is controlled by a temperature control system, so that the temperature of the surface of the formed steel strip is controlled to a suitable temperature for crystallization of the TGIC melt, so that the TGIC melt discharged from the feed machine head crystallizes on the surface of the formed steel strip, and the crystallized TGIC particles are scraped off the formed steel strip by a scraper at the discharge end of the formed steel strip.

[0023] Optionally, the length of each exhaust zone is 4-6D.

[0024] Through the above technical solution, each exhaust zone is composed of a single-section cylinder. The single-section cylinder is not very long, the total number of sections of the cylinder is more, and each section of the cylinder can be set with a separate temperature. The temperature adjustment range is wider, which is conducive to ensuring that the process objectives are easier to achieve.

[0025] Optionally, the screw is provided with reverse thread segments at the inlet and outlet of each exhaust zone.

[0026] With the above technical solution, by arranging reverse thread sections on the screw at the inlet and outlet of the exhaust zone, melt sealing is achieved, forming a relatively independent vacuum degassing chamber, thereby improving the devolatilization effect.

[0027] The present application also discloses another high-efficiency integrated devolatilization and melt extrusion granulation device, which includes a twin-screw extruder, a melt pump, a distribution head and a steel belt forming machine. A main feed port is provided at one end of the twin-screw extruder barrel, and a discharge port is provided at the other end. At least three exhaust zones are provided on the twin-screw extruder barrel, and a vacuum port is provided on each exhaust zone. The vacuum port is connected to the vacuum pump system through a pipeline, and the discharge port of the twin-screw extruder is connected to the second-stage extruder. A side feed port is provided on the barrel of the second-stage extruder, and the discharge port of the second-stage extruder is connected to the distribution head through a melt pump; a steel belt forming machine is arranged downstream of the outlet of the distribution head.

[0028] According to the above technical solution, material is added to the main feeding port, melted by heating in the feeding and melting zone, and conveyed to the discharge end by a twin-screw extruder. By providing at least three exhaust zones, multiple devolatilization operations are performed during the material conveying process, and different substances can be devolatilized and collected by controlling different pressures. The material passes through the exhaust zone and is connected to a vacuum pump system through a vacuum port on the exhaust zone. Substances volatilized after the material is melted are discharged and collected by the vacuum pump system. The molten TGIC after devolatilization is fed to the distribution die through a second-stage extruder. During the conveying process, TGIC dry powder from which epichlorohydrin and alcohols have been removed is added through a side feed port on the second-stage extruder as a seed for its crystallization and formation, accelerating the crystallization and solidification of TGIC, thereby improving the efficiency of crystallization and granulation. In addition, the second-stage extruder can increase the contact time between the TGIC dry powder and the molten TGIC, enabling more uniform mixing under the action of the second-stage extruder, thereby further improving the efficiency of crystallization and granulation. The discharge port of the second-stage extruder is connected to the distribution head through a melt pump. The TGIC melt is evenly formed into a spherical liquid through the distribution head and drips onto the forming steel belt. The TGIC droplets are cooled and crystallized by the temperature control mechanism on the steel belt forming machine to form granules. It has the advantages of high granulation density and high production efficiency.

[0029] Optionally, the aspect ratio of the screw of the twin-screw extruder is 32-56D.

[0030] The above technical solution can avoid the situation where the aspect ratio of the twin-screw extruder screw is too small, resulting in the inability to complete melting and multiple vacuum degassing operations. It can also avoid the situation where the aspect ratio of the twin-screw extruder screw is too large, resulting in a long heating process of TGIC in the extruder, which is easy to cause the ring opening of some epoxy groups, resulting in reduced product activity and yield.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. The TGIC efficient devolatilization and melt extrusion granulation integrated device of the present application adds material to the main feeding port, heats and melts the material in the feeding and melting zone, and conveys it to the discharge end through a twin-screw extruder. By providing at least three exhaust zones, multiple devolatilizations are performed during the material conveying process, and different substances can be devolatilized and collected by controlling different pressures. The material passes through the exhaust zone and is connected to a vacuum pump system through a vacuum port on the exhaust zone. The volatilized substances after the material is melted are discharged and collected by the vacuum pump system. A side feeding device is added between the last vacuum port and the outlet to realize the feeding of TGIC dry powder, increase the TGIC crystallization rate, and further improve production efficiency.

[0033] The devolatilized TGIC melt is evenly formed into spherical liquid through the distribution machine head, and drips onto the forming steel belt. The TGIC droplets are cooled and crystallized by the temperature control mechanism on the steel belt forming machine to form granules, which has the advantages of high granulation density and high production efficiency.

[0034] 2. By setting reverse thread sections on the screw sleeves at the inlet and outlet of the exhaust zone, melt sealing is achieved, forming a relatively independent vacuum degassing chamber, further improving the devolatilization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural diagram of Example 1 of the present application.

[0036] Figure 2 It is a schematic diagram of the structure of the screw of Example 1 of the present application.

[0037] Figure 3 It is a structural schematic diagram of the steel strip forming machine according to an embodiment of the present application.

[0038] Figure 4 It is a structural diagram of Example 2 of the present application.

[0039] Figure 5 This is a structural diagram of Example 3 of this application.

[0040] Figure 6 It is a schematic diagram of the structure of the screw of Example 4 of the present application.

[0041] Description of reference numerals:

[0042] 1. Frame; 2. Extruder barrel; 3. Screw; 4. Feeding and melting zone; 5. First exhaust zone; 6. Second exhaust zone; 7. Third exhaust zone; 8. Melt homogenization and conveying zone; 9. Main feed port; 10. Discharge port; 11. Transmission mechanism; 12. Air injection port; 13. Vacuum pump system; 14. First side feed port; 15. Second side feed port; 16. Melt pump; 17. Second-stage extruder; 18. Fabrication die; 19. Steel strip forming machine; 20. Metering feeding system; 21. Side feeding system; 22. Second melt pump; 23. Rotary dripper; 24. Scraper; 31. Transmission rod; 32. Reverse thread sleeve; 33. Forward thread sleeve; 51. First vacuum port; 61. Second vacuum port; 71. Third vacuum port. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-6 This application is described in further detail.

[0044] Example 1:

[0045] Reference Figure 1 and Figure 2This embodiment discloses an integrated device for efficient TGIC devolatilization and melt extrusion granulation, comprising a frame 1, on which is disposed a twin-screw extruder barrel 2. A main feed port 9 is disposed at one end of the twin-screw extruder barrel 2, and a discharge port 10 is disposed at the other end. The main feed port 9 is connected to a metering feeding system 20 for feeding TGIC wet powder. A pair of screws 3 are disposed within the twin-screw extruder barrel 2, one end of which is driven for rotation by a transmission mechanism 11. The transmission mechanism 11 drives the screws 3 to rotate within the twin-screw extruder barrel 2, and the two screws 3 can rotate in the same direction or in opposite directions. In this embodiment, the transmission mechanism 11 drives the two screws 3 to rotate in the same direction. In this embodiment, the pair of screws 3 disposed within the twin-screw extruder barrel 2 are meshed.

[0046] The aspect ratio of the screw 3 is between 48-72D, and the twin-screw extruder barrel 2 between the main feeding port 9 and the discharge port 10 is provided with five functional sections, namely: feeding and melting zone 4, first degassing zone 5, second degassing zone 6, third degassing zone 7, and melt homogenization and conveying zone 8.

[0047] The feeding and melting zone 4 is 8-12D long and primarily functions as a transport and melting point for the TGIC solids. A heating mechanism is provided on the twin-screw extruder barrel 2 in the feeding and melting zone 4 to heat and melt the TGIC solids. The first, second, and third exhaust zones 5, 6, and 7 are 4-6D long, respectively. Each exhaust zone has a vacuum port on the twin-screw extruder barrel 2, namely, a first vacuum port 51 in the first exhaust zone 5, a second vacuum port 61 in the second exhaust zone 6, and a third vacuum port 71 in the third exhaust zone 7. Each vacuum port is connected to a vacuum pump system 13 via a piping system. The vacuum pump system 13 is connected to a cooling jacket and a liquid recovery pipe to facilitate condensation recovery of volatile components. The vacuum pump pipe is provided with a jacket, and a recovery tank is provided at the outlet. The jacket can pass cooling water, so that the volatile components such as alcohols and epichlorohydrin removed by vacuum are condensed and recovered into the storage tank, thereby improving the safety and environmental protection of the production process. The vacuum pump used in the vacuum pump system 13 can be one of a Roots vacuum pump, a water ring vacuum pump, and a screw vacuum pump, or a combination of two.

[0048] Reverse thread sections are provided at the entrance and exit of the first exhaust zone 5 , the entrance and exit of the second exhaust zone 6 , and the entrance and exit of the third exhaust zone 7 to achieve melt sealing, forming relatively independent vacuum degassing chambers.

[0049] A first side feed port 14 is provided on the twin-screw extruder barrel 2 between the first exhaust zone 5 and the second exhaust zone 6. The first side feed port 14 is connected to a metering feeding system 20. The TGIC wet powder is fed into the first side feed port 14 through the metering feeding system 20, thereby achieving multiple feeding of the TGIC wet powder and reducing the problem of uneven melting and plasticization caused by centralized feeding.

[0050] The melt homogenization and conveying zone 8 is arranged between the third exhaust zone 7 and the discharge port 10. The length of the melt homogenization and conveying zone 8 is between 18-24D. A second side feeding port 15 is opened on the melt homogenization and conveying zone 8. The second side feeding port 15 is connected to the side feeding system 21 to realize the metered feeding of TGIC dry powder.

[0051] Reference Figure 1 and Figure 3 The discharge port 10 on the twin-screw extruder barrel 2 is connected to the distribution head 18 via a melt pump 16. The melt pump 16 provides the required pressure, reducing the workload of the twin-screw extruder, thereby reducing shear heat and required torque, eliminating fluctuations, and optimizing the performance of the twin-screw extruder. The distribution head 18 is also connected to a rotary dripper 23. The distribution head 18 is used to uniformly shape the TGIC melt into spherical droplets. The rotary dripper 23 then drips the spherical droplets onto one end of a forming steel strip 1901 on a steel strip forming machine 19. The steel strip forming machine 19 is equipped with a temperature control system 1902, which can achieve temperature control of the forming steel strip 1901. The temperature control system 1902 on the steel strip forming machine 19 controls the temperature of the forming steel strip 1901, cooling and crystallizing the TGIC in the spherical droplets. Granulation is thereby achieved. A scraper 24 is provided at the other end of the forming steel belt 1901, that is, the tail. The scraper 24 contacts the forming steel belt 1901 and is used to hang down and collect the TGIC crystal grains formed on the forming steel belt 1901.

[0052] The temperature control system 1902 can adopt electric heating temperature control, water bath temperature control, oil bath temperature control, gas phase control, etc. In this embodiment, the temperature control system 1902 controls the temperature of the back of the formed steel strip 1901 by water bath temperature control.

[0053] In this embodiment, the motors of the twin-screw extruder, the metering feeding system 20, the melt pump 16 and the material distribution head 18 are all explosion-proof motors, which can improve the safety of the production process.

[0054] The working process of the TGIC high-efficiency devolatilization and melt extrusion granulation integrated device of this embodiment is as follows:

[0055] The TGIC wet powder obtained after synthesis and alcohol crystallization is fed into the barrel 2 of a twin-screw extruder from the main feed port 9 via a metering feeding system 20. The TGIC wet powder is melted in the feeding and melting zone 4 of the twin-screw extruder and flows toward the discharge port 10 under the action of the twin screws 3. During this process, the vacuum pump system 13 controls the vacuum level of the first vacuum port 51 in the first exhaust zone 5, the second vacuum port 61 in the second exhaust zone 6, and the third vacuum port 71 in the third exhaust zone 7 to perform vacuum devolatilization, thereby removing impurities such as epichlorohydrin and alcohol from the TGIC melt.

[0056] Metered TGIC wet powder is added through the first side feed port 14, further increasing production and reducing the uneven melt plasticization caused by centralized feeding. Dry TGIC powder, free of epichlorohydrin and alcohol, is added through the second side feed port 15 as seed crystals for crystallization, accelerating the cooling time of the TGIC crystals. Finally, the melt mixed with the TGIC dry powder is fed through the discharge port 10 via the melt pump 16 into the distribution head 18. The TGIC melt is uniformly formed into spherical liquids by the distribution head 18 and drips onto the forming belt 1901 of the steel belt forming machine 19. The forming belt 1901 moves at a constant speed, and the temperature of the portion of the steel belt forming machine 19 in contact with the TGIC is controlled by the temperature control system 1902 of the steel belt forming machine 19. The TGIC particles formed by the steel belt are collected by the scraper 24 at the tail of the forming belt 1901 to obtain TGIC pellets.

[0057] Example 2:

[0058] Reference Figure 4 The rest of this embodiment is the same as that of Example 1, except that, in this embodiment, a gas injection port 12 is further provided on the twin-screw extruder barrel 2, and the gas injection port 12 is provided between the second exhaust zone 6 and the third exhaust zone 7. Low-boiling-point inert compounds, such as water, nitrogen, carbon dioxide, etc., are injected from the gas injection port 12 and then volatilized through the third vacuum port 71, which has a carrying effect on the small molecular components to be removed in the material, thereby improving the devolatilization effect.

[0059] Example 3:

[0060] Reference Figure 5 The rest of this embodiment is the same as that of Example 2, except that, in this embodiment, the aspect ratio of the screw 3 of the twin-screw extruder is 36-52D, the discharge port 10 on the barrel 2 of the twin-screw extruder is connected to a second-stage extruder 17 through a melt pump 16, the inlet of the melt pump 16 is connected to the discharge port 10 of the twin-screw extruder, and the outlet of the melt pump 16 is connected to the inlet of the second-stage extruder 17.

[0061] The secondary extruder 17 can be a single-screw extruder or a twin-screw extruder. In this embodiment, the secondary extruder 17 is a co-rotating twin-screw extruder. Furthermore, in this embodiment, the second side feed port 15 is not located between the discharge ports 10 of the third exhaust zone 7. Instead, the second side feed port 15 is disposed on the barrel of the secondary extruder 17 and is connected to a side feeding system 21. The outlet of the secondary extruder 17 is connected to the distribution die 18 via a second melt pump 22.

[0062] Example 4:

[0063] Reference Figure 6 The rest of this embodiment is the same as that of Example 3, except that, in this embodiment, a pair of screws 3 arranged in the twin-screw extruder barrel 2 are provided with only one meshing portion at the inlet and outlet of the first exhaust zone 5, the inlet and outlet of the second exhaust zone 6, and the inlet and outlet of the third exhaust zone 7, and the rest of the portions are non-meshing structures.

[0064] In order to facilitate the processing of the screw 3, in this embodiment, the screw 3 includes a transmission rod 31 and a screw sleeve mounted on the transmission rod 31, and the screw sleeve includes a reverse threaded screw sleeve 32 arranged at the entrance and exit of the first exhaust area 5, the entrance and exit of the second exhaust area 6, and the entrance and exit of the third exhaust area 7, as well as a forward threaded screw sleeve 33 of the remaining parts.

Claims

1. A TGIC high-efficiency devolatilization and melt extrusion granulation integrated device, characterized by: The invention comprises a twin-screw extruder, a melt pump, a material distribution head (18) and a steel strip forming machine (19), wherein a main feeding port (9) is provided at one end of the twin-screw extruder barrel (2), and a discharge port (10) is provided at the other end. At least three exhaust zones are provided on the twin-screw extruder barrel (2), and a vacuum port is provided on each exhaust zone. The vacuum port is connected to a vacuum pump system (13) through a pipeline, and a cooling sleeve and a liquid recovery pipe are connected to the vacuum pump system (13). A jacket is provided on the pipeline of the vacuum pump, and a recovery tank is provided at the outlet. The jacket can pass cooling water, so that the alcohol and epichlorohydrin volatile components removed by vacuum are condensed and recovered in a storage tank. A side feeding port is also provided on the twin-screw extruder barrel (2) between the last vacuum port and the discharge port (10); A melt pump is provided between the discharge port (10) of the twin-screw extruder and the material distribution head (18), and a steel strip forming machine (19) is arranged downstream of the outlet of the material distribution head (18); A side feed port is also provided on the twin-screw extruder barrel (2), and the side feed port is provided between any two vacuum degassing zones; An air injection port (12) is also provided on the twin-screw extruder barrel (2), and the air injection port (12) is provided between the second vacuum port (61) and the third vacuum port (71).

2. The TGIC high-efficiency devolatilization and melt extrusion granulation integrated device according to claim 1, characterized in that: The aspect ratio of the twin-screw extruder screw (3) is 48-72D.

3. The TGIC high-efficiency devolatilization and melt extrusion granulation integrated device according to claim 1, characterized in that: The steel strip forming machine (19) includes a forming steel strip (1901) and a temperature control system (1902) for controlling the surface temperature of the forming steel strip (1901). A scraper (24) is provided at the discharge end of the forming steel strip (1901), and the scraper (24) contacts the surface of the forming steel strip (1901).

4. The high-efficiency devolatilization and melt extrusion granulation integrated device according to claim 1, characterized in that: The length of each exhaust zone is 4-6D.

5. The TGIC high-efficiency devolatilization and melt extrusion granulation integrated device according to any one of claims 1 to 4, characterized in that: The screw (3) is provided with a reverse thread section at the inlet and outlet of each exhaust zone.

6. A TGIC high-efficiency devolatilization and melt extrusion granulation integrated device, characterized by: The invention comprises a twin-screw extruder, a melt pump, a feeding head (18) and a steel strip forming machine (19), wherein a main feeding port (9) is provided at one end of the twin-screw extruder barrel (2), and a discharge port (10) is provided at the other end, at least three exhaust zones are provided on the twin-screw extruder barrel (2), and a vacuum port is provided on each exhaust zone, wherein the vacuum port is connected to a vacuum pump system (13) through a pipeline, and the vacuum pump system (13) is connected to a cooling sleeve and a liquid recovery pipe, and the vacuum The pump pipe is provided with a jacket, and a recovery tank is provided at the outlet. The jacket can pass cooling water, so that the alcohols and epichlorohydrin volatiles removed by vacuum are condensed and recovered in the storage tank. The discharge port (10) of the twin-screw extruder is connected to the second-stage extruder (17), and a side feeding port is provided on the barrel of the second-stage extruder (17). The discharge port of the second-stage extruder (17) is connected to the distribution head (18) through a melt pump; a steel strip forming machine (19) is arranged downstream of the outlet of the distribution head (18).

7. The TGIC high-efficiency devolatilization and melt extrusion granulation integrated device according to claim 6, characterized in that: The aspect ratio of the twin-screw extruder screw (3) is 32-56D.

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