PI resin continuous refining equipment based on multiphase flow reactor design

Abstract

The utility model relates to PI (Polyimide) resin continuous refining equipment based on multiphase flow reactor design, which belongs to the technical field of PI resin refining equipment and comprises a support, a collecting barrel is arranged below the support, a distillation barrel is fixedly mounted at the top of the support, a separation barrel is fixedly mounted at the top of the distillation barrel, and the separation barrel is fixedly mounted at the bottom of the support. A liquid leakage pipe of which the bottom end extends into the distillation barrel is fixedly mounted at the top of the separation barrel. According to the PI resin continuous refining equipment designed based on the multiphase flow reactor, the flow guide hopper is arranged on the inner side wall of the distillation barrel, a PI resin solution without impurities drips into the flow guide hopper, the PI resin solution flows away on the inner surface of the flow guide hopper, the contact area with the flow guide hopper is increased, the flow guide hopper is heated through the heating pipe, and the refining efficiency is improved. Water and a solvent in the PI resin solution are rapidly evaporated, PI resin powder is left, the process can be continuously carried out without waiting for solution aggregation, meanwhile, the heated solution is relatively less, and the heating power is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of PI resin refining equipment, in particular to PI resin continuous refining equipment based on multiphase flow reactor design. Background Art

[0002] PI resin, polyimide resin, is a special engineering material with unique properties. PI resin has extremely high temperature resistance, high strength, high modulus, high fracture toughness and excellent dimensional stability. PI resin has excellent chemical resistance. Usually only concentrated sulfuric acid can dissolve or destroy it. PI resin itself is flame retardant. PI resin has good toughness. PI resin has outstanding tribological properties, excellent resistance to sliding wear and micro-wear, especially high wear resistance and low friction coefficient at 250 degrees Celsius. The synthesis of PI resin requires the preparation of various raw materials, including dianhydride monomers, diamine monomers, catalysts, initiators, solvents, etc., and the polymerization of various raw materials. The synthesis of PI resin is a complex polymerization process, which requires the control of reaction temperature, pressure, time and other parameters to obtain PI resin with the desired properties.

[0003] During the synthesis process of PI resin, it will contain impurities such as unreacted monomers, catalysts, initiators, etc. In order to obtain high-purity PI resin, purification treatment is required. Commonly used purification methods include solvent extraction, heat treatment and column chromatography, etc. During the refining process of PI resin, it can be completed through a multiphase flow reactor. A multiphase flow reactor is a reactor used to process substances in different phases, such as gas, liquid, solid, etc. during the reaction process.

[0004] However, when separating the PI resin dissolved in the solvent from the solvent, the common multiphase flow reactor needs to gather the mixture and then heat and evaporate it to separate the PI resin from the solvent, which is not convenient for the continuous refining of the PI resin. In view of this, the present application proposes a PI resin continuous refining equipment based on the design of a multiphase flow reactor. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a PI resin continuous refining equipment designed based on a multiphase flow reactor, which has the advantages of distilling the mixed solution during the flow process and continuously separating the solvent from the PI resin. It solves the problem that when separating the PI resin dissolved in the solvent from the solvent, the mixture needs to be gathered together and then heated and evaporated to separate the PI resin from the solvent, which is inconvenient for continuous refining of the PI resin.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a PI resin continuous refining equipment based on a multiphase flow reactor design, comprising a bracket, a collecting barrel is placed below the bracket, a distillation barrel is fixedly installed on the top of the bracket, a separation barrel is fixedly installed on the top of the distillation barrel, and a leakage pipe with a bottom end extending to the inside of the distillation barrel is fixedly installed on the top of the separation barrel;

[0007] A discharge pipe with its bottom end extending to above the collecting barrel is fixedly installed on the top of the distillation barrel, a guide hopper is fixedly installed on the inner wall of the distillation barrel, the bottom opening of the guide hopper is connected to the top of the discharge pipe, a heating tube is fixedly installed on the outer surface of the guide hopper, and a steam outlet pipe is fixedly installed on one side of the distillation barrel.

[0008] Furthermore, a solution barrel is fixedly mounted on the top of the bracket, a delivery pump is fixedly mounted on the inner bottom wall of the solution barrel, and a solution conduit is fixedly mounted on the output end of the delivery pump.

[0009] Furthermore, a top cover is bolted to the top of the separation barrel, a feed hopper is fixedly installed on the top of the top cover, the output end of the solution conduit extends to the inside of the feed hopper, a placement ring is fixedly installed on the inner wall of the separation barrel, and a separation filter element is placed on the top of the placement ring.

[0010] Furthermore, a mixing shaft is rotatably mounted on the bottom of the top cover, mixing blades are fixedly mounted on the surface of the mixing shaft, and a mixing motor with an output end fixedly connected to the top end of the mixing shaft is fixedly mounted on the top of the top cover.

[0011] Furthermore, a partition is fixedly installed on the inner wall of the solution barrel, a condenser is fixedly installed on the output end of the steam outlet pipe, the condenser extends to the inside of the solution barrel, and the output end of the condenser extends to below the partition.

[0012] Furthermore, a solution input pipe is fixedly installed on the surface of the solution barrel below the partition, a coolant inlet pipe is fixedly installed on the top of the solution barrel, and a coolant outlet pipe is fixedly installed on the surface of the solution barrel above the partition.

[0013] Compared with the prior art, the utility model provides a PI resin continuous refining equipment based on a multiphase flow reactor design, which has the following beneficial effects:

[0014] The PI resin continuous refining equipment designed based on a multiphase flow reactor sets a guide hopper on the inner wall of the distillation barrel, and drips the PI resin solution containing no impurities into the guide hopper. The PI resin solution flows on the inner surface of the guide hopper to increase the contact area with the guide hopper. The guide hopper is heated by a heating tube to quickly evaporate the water and solvent in the PI resin solution, leaving PI resin powder. This process can be carried out continuously without waiting for the solution to gather. At the same time, the heated solution is relatively small, which reduces the heating power. This solves the problem that when separating the PI resin dissolved in the solvent from the solvent, the mixture needs to be gathered and heated and evaporated to separate the PI resin from the solvent, which is not convenient for continuous refining of the PI resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a front view cross-sectional view of the separation barrel of the utility model;

[0017] Figure 3 This is a front view cross-sectional view of the solution barrel of the utility model;

[0018] Figure 4 It is a three-dimensional schematic diagram of the guide bucket of the utility model.

[0019] In the figure: 1. bracket; 2. collecting barrel; 3. distillation barrel; 4. separation barrel; 5. leakage pipe; 6. discharge pipe; 7. guide bucket; 8. heating pipe; 9. steam outlet pipe; 10. solution barrel; 11. delivery pump; 12. solution conduit; 13. top cover; 14. feed hopper; 15. placement ring; 16. separation filter element; 17. mixing shaft; 18. mixing blades; 19. mixing motor; 20. partition; 21. condenser; 22. solution input pipe; 23. coolant inlet pipe; 24. coolant outlet pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figures 1 to 4 A PI resin continuous refining equipment based on a multiphase flow reactor design includes a bracket 1, a collecting barrel 2 is placed below the bracket 1, a distillation barrel 3 is fixedly installed on the top of the bracket 1, a separation barrel 4 is fixedly installed on the top of the distillation barrel 3, and a leakage pipe 5 with its bottom end extending into the inside of the distillation barrel 3 is fixedly installed on the top of the separation barrel 4.

[0022] Among them, a discharge pipe 6 whose bottom end extends to the top of the collecting barrel 2 is fixedly installed on the top of the distillation barrel 3, a guide hopper 7 is fixedly installed on the inner wall of the distillation barrel 3, the bottom opening of the guide hopper 7 is connected to the top of the discharge pipe 6, a heating pipe 8 is fixedly installed on the outer surface of the guide hopper 7, and a steam outlet pipe 9 is fixedly installed on one side of the distillation barrel 3. The PI resin solution slowly drips onto the inner surface of the guide hopper 7 through the leakage pipe 5, flows away on the inner surface of the guide hopper 7, and the heating pipe 8 heats the guide hopper 7 to quickly evaporate the solvent and water in the PI resin solution, leaving PI resin powder.

[0023] Meanwhile, a solution barrel 10 is fixedly mounted on the top of the bracket 1 , a delivery pump 11 is fixedly mounted on the inner bottom wall of the solution barrel 10 , and a solution conduit 12 is fixedly mounted on the output end of the delivery pump 11 .

[0024] Among them, a top cover 13 is bolted to the top of the separation barrel 4, a feed hopper 14 is fixedly installed on the top of the top cover 13, the output end of the solution conduit 12 extends to the inside of the feed hopper 14, a placement ring 15 is fixedly installed on the inner wall of the separation barrel 4, and a separation filter element 16 is placed on the top of the placement ring 15.

[0025] The unrefined PI resin is put into the feed hopper 14 , and the delivery pump 11 delivers the solvent for dissolving the PI resin in the solution barrel 10 to the feed hopper 14 , mixes with the unrefined PI resin, and then flows into the separation barrel 4 .

[0026] Secondly, a mixing shaft 17 is rotatably mounted at the bottom of the top cover 13, a mixing blade 18 is fixedly mounted on the surface of the mixing shaft 17, and a mixing motor 19 whose output end is fixedly connected to the top of the mixing shaft 17 is fixedly mounted on the top of the top cover 13. The mixing motor 19 drives the mixing shaft 17 to rotate, drives the mixing blade 18 to rotate, mixes the PI resin and the solvent, and then passes through the separation filter element 16, leaving the impurities in the separation filter element 16, and the PI resin solution passes through the separation filter element 16.

[0027] At the same time, a partition 20 is fixedly installed on the inner wall of the solution barrel 10 , and a condenser 21 is fixedly installed on the output end of the steam outlet pipe 9 . The condenser 21 extends to the inside of the solution barrel 10 , and the output end of the condenser 21 extends to the bottom of the partition 20 .

[0028] The surface of the solution barrel 10 below the partition 20 is fixedly provided with a solution input pipe 22, the top of the solution barrel 10 is fixedly provided with a coolant inlet pipe 23, and the surface of the solution barrel 10 above the partition 20 is fixedly provided with a coolant outlet pipe 24. Coolant is introduced into the space above the partition 20 in the solution barrel 10 to cool and liquefy the solvent vapor in the condenser 21, and the liquefied solvent flows into the space below the partition 20 in the solution barrel 10 for secondary utilization.

[0029] When this embodiment is in use, the PI resin solution is dripped onto the inner surface of the guide bucket 7, and the PI resin solution flows, thereby increasing the contact area between the PI resin solution and the guide bucket 7. The guide bucket 7 is then heated by the heating tube 8 to quickly evaporate the PI resin solution on the inner surface of the guide bucket 7, leaving PI resin powder. This process does not require the PI resin solution to be concentrated and then processed uniformly, thereby ensuring the continuity of the refining process. By increasing the contact area between the PI resin solution and the guide bucket 7, the heating efficiency is increased and the power required for heating is reduced.

[0030] The electrical components appearing in the article are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not described in detail in the article.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PI resin continuous refining equipment based on a multiphase flow reactor design, comprising a support (1), characterized in that: A collecting barrel (2) is placed below the support (1), a distillation barrel (3) is fixedly mounted on the top of the support (1), a separation barrel (4) is fixedly mounted on the top of the distillation barrel (3), and a liquid leakage pipe (5) is fixedly mounted on the top of the separation barrel (4), the bottom end of which extends into the interior of the distillation barrel (3); A discharge pipe (6) whose bottom end extends to the top of the collecting barrel (2) is fixedly installed on the top of the distillation barrel (3); a guide hopper (7) is fixedly installed on the inner wall of the distillation barrel (3); the bottom opening of the guide hopper (7) is connected to the top of the discharge pipe (6); a heating pipe (8) is fixedly installed on the outer surface of the guide hopper (7); and a steam outlet pipe (9) is fixedly installed on one side of the distillation barrel (3).

2. The PI resin continuous refining equipment based on a multiphase flow reactor design according to claim 1, characterized in that: A solution barrel (10) is fixedly mounted on the top of the support (1), a delivery pump (11) is fixedly mounted on the inner bottom wall of the solution barrel (10), and a solution conduit (12) is fixedly mounted on the output end of the delivery pump (11).

3. The PI resin continuous refining equipment based on a multiphase flow reactor design according to claim 2, characterized in that: The top of the separation barrel (4) is bolted with a top cover (13), a feed hopper (14) is fixedly installed on the top of the top cover (13), the output end of the solution conduit (12) extends to the inside of the feed hopper (14), and a placement ring (15) is fixedly installed on the inner side wall of the separation barrel (4), and a separation filter element (16) is placed on the top of the placement ring (15).

4. The PI resin continuous refining equipment based on a multiphase flow reactor design according to claim 3, characterized in that: A mixing shaft (17) is rotatably mounted on the bottom of the top cover (13), a mixing blade (18) is fixedly mounted on the surface of the mixing shaft (17), and a mixing motor (19) whose output end is fixedly connected to the top end of the mixing shaft (17) is fixedly mounted on the top of the top cover (13).

5. The PI resin continuous refining equipment based on a multiphase flow reactor design according to claim 2, characterized in that: A partition (20) is fixedly mounted on the inner wall of the solution barrel (10), a condenser (21) is fixedly mounted on the output end of the steam outlet pipe (9), the condenser (21) extends into the interior of the solution barrel (10), and the output end of the condenser (21) extends below the partition (20).

6. The PI resin continuous refining equipment based on a multiphase flow reactor design according to claim 5, characterized in that: A solution input pipe (22) is fixedly installed on the surface of the solution barrel (10) below the partition (20), a coolant inlet pipe (23) is fixedly installed on the top of the solution barrel (10), and a coolant outlet pipe (24) is fixedly installed on the surface of the solution barrel (10) above the partition (20).

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