Melt polycondensation reactor

Abstract

The utility model discloses a melt polycondensation reactor and belongs to the field of chemical reaction devices. Comprising a shell, an inner coil pipe and a stirring device, the inner coil pipe and the stirring device are arranged in the shell, and the inner coil pipe is connected with a first HTM inlet pipe and a first HTM outlet pipe; hTM enters the inner coil pipe through the first HTM inlet pipe, materials are subjected to heat preservation, and the HTM flows out of the first HTM outlet pipe after the reaction is finished. According to the utility model, HTM is input into the inner coil pipe and HTM steam is introduced into the shell, so that heating and heat preservation effects are provided when materials are subjected to condensation polymerization, and incomplete reaction caused by viscous agglomeration of the materials in the reaction process is prevented.

Description

Technical Field

[0001] The utility model belongs to the field of chemical reaction devices, and particularly relates to a melt polycondensation reactor. Background Art

[0002] Condensation polymerization reaction, abbreviated as polycondensation reaction, refers to the reaction in which one or more monomers are condensed with each other to form a polymer, and its main product is called a polycondensate. The monomers of the condensation polymerization reaction are compounds with two (or more) reactive functional groups. When polymerizing, small molecules are removed to form a polymer. Therefore, the molecular weight of the repeating structural unit of the polymer is smaller than that of the monomer. At present, polycondensation reactions include melt polycondensation, solution polycondensation, solid-phase polycondensation, and interfacial polycondensation. Among them, melt polycondensation has obvious advantages in terms of product quality, economy, environmental protection, and industrial implementation. Therefore, melt polycondensation reaction is mostly used at present.

[0003] During the process of melt polycondensation, it is required that the material flow and mixing effect are good, and high heat transfer and mass transfer efficiency are needed. However, at present, the melt polycondensation reactor has uneven heating, resulting in material adhesion and incomplete polycondensation reaction.

[0004] Therefore, it is necessary to provide a melt polycondensation reactor with good heating and heat preservation effects. Summary of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the utility model provides a melt polycondensation reactor, which has excellent heating and heat preservation effects and can ensure the normal progress of the polycondensation reaction.

[0006] The technical solution of the utility model is as follows:

[0007] A melt polycondensation reactor includes a shell, an inner coil pipe and a stirring device arranged inside the shell. The inner coil pipe is connected with a first HTM inlet pipe and a first HTM outlet pipe; HTM enters the inner coil pipe through the first HTM inlet pipe to keep the material warm, and flows out from the first HTM outlet pipe after the reaction ends.

[0008] Further, an additive inlet pipe and a heat preservation tank are arranged at the upper end of the shell.

[0009] Further, a flow guide plate and a second HTM inlet pipe are arranged inside the heat preservation tank, and a closed cover is arranged at the upper end.

[0010] Further, the side of the closed cover close to the stirring shaft is a cavity, and heat insulating materials are arranged at the lower end of the cavity.

[0011] Further, a cooling water inlet pipe and a cooling water outlet pipe are arranged above the closed cover.

[0012] Further, an HTM heat preservation layer is arranged inside the cavity of the shell.

[0013] Further, a fixing plate is provided at the upper end of the first HTM outlet pipe.

[0014] Further, the inside of the fixing plate presents a cavity, the lower end is communicated with the inner coil pipe, and the upper end is provided with a first ventilation port.

[0015] Further, a second ventilation port is provided at the upper end of the first HTM inlet pipe.

[0016] Further, a first HTM steam inlet pipe and a first HTM steam outlet pipe are provided at the lower end of the housing; a second HTM steam inlet pipe, a second HTM steam outlet pipe and a third ventilation port are provided on the side surface.

[0017] Beneficial effects: The utility model has the following beneficial effects:

[0018] (1) An HTM heat preservation layer is provided inside the cavity of the housing of the utility model. By introducing HTM steam into the HTM heat preservation layer, the materials in the reactor are further heated up, preventing the adhesion between the materials and ensuring the progress of the polycondensation reaction.

[0019] (2) An inner coil pipe is provided inside the housing of the utility model. HTM is introduced into the inner coil pipe and heated by the HTM steam in the cavity of the housing, and is used as a heat transfer medium for heat preservation, providing a continuous temperature and having an excellent heat preservation effect.

[0020] (3) A heat preservation groove is provided at the upper end of the housing of the utility model. HTM is introduced into the groove as a heat preservation medium, further ensuring the heat preservation effect, being beneficial to ensuring the temperature inside the reactor and being beneficial to the progress of the polycondensation reaction. Description of the drawings

[0021] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 is a schematic diagram of the heat preservation groove and the closing cover structure of the utility model;

[0023] Figure 3 is a schematic diagram of each feed / discharge port of the utility model viewed from above;

[0024] Figure 4 is a partial schematic diagram of the lower end of the utility model;

[0025] Figure 5 is a schematic diagram of the inner coil pipe A-A of the utility model;

[0026] Figure 6 is a schematic diagram of the inner coil pipe B-B of the utility model.

[0027] In the figure: 1. Housing; 2. First HTM inlet pipe; 3. First HTM outlet pipe; 4. First HTM steam inlet pipe; 5. Second HTM steam inlet pipe; 6. First HTM steam outlet pipe; 7. Discharge port; 8. Second HTM steam outlet pipe; 9. Third ventilation opening; 10. Inner coil; 11. Fixed plate; 12. Thermometer; 13. First ventilation opening; 14. Fixed rod; 15. Additive inlet pipe; 16. Second HTM inlet pipe; 17. Cooling water inlet pipe; 18. Motor; 19. Cooling water outlet pipe; 20. Second HTM outlet pipe; 21. Second ventilation opening; 22. HTM insulation layer; 23. Stirring shaft; 24. Stirring blade; 25. Heat insulating material; 26. Deflector; 27. Feed inlet; 28. Steam outlet; 29. First sight glass opening; 30. Second sight glass opening; 31. Insulation tank; 32. Sealing cover. Detailed implementation mode

[0028] The following further clarifies the present invention in conjunction with the accompanying drawings and specific embodiments. These embodiments are implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0029] As Figures 1 to 6 shown, the present invention provides a melt polycondensation reactor, which includes a housing 1, an inner coil 10 and a stirring device arranged inside the housing 1. The inner coil 10 is connected to the first HTM inlet pipe 2 and the first HTM outlet pipe 3; materials are put into the reactor through the feed inlet 27. The motor 18 is powered on, and the output end is connected to the stirring shaft 23, and then rotates to drive the stirring blade 24 to stir the raw materials. During the reaction process, HTM (heat transfer medium) enters the inner coil 10 through the first HTM inlet pipe 2 to keep the materials warm, and flows out from the first HTM outlet pipe 3 after the reaction ends; HTM steam is introduced through the first HTM steam inlet pipe 4 and the second HTM steam inlet pipe 5 to achieve the effects of heating up and keeping warm, and transfer heat to the HTM in the inner coil 10. During the stirring process, the materials continuously contact the inner coil 10 to provide heat to ensure the progress of the polycondensation reaction. Moreover, an insulation tank 31 is provided at the upper end of the housing 1, and HTM is injected through the second HTM inlet pipe 16 to achieve the insulation effect again. Cooling water is introduced into the sealing cover 32 at the upper end of the insulation tank 31 through the cooling water inlet pipe, and further combines with the heat insulating material 25 to achieve the insulation effect. The thermometer 12 is used to ensure the temperature inside the reactor to make the polycondensation reaction proceed normally.

[0030] As Figure 1 and 2 shown, an additive inlet pipe 15 and an insulation tank 31 are provided at the upper end of the housing 1. During the reaction process, additives are put into the reactor through the additive inlet pipe 15 to ensure the normal progress of the reaction.

[0031] Inside the heat preservation tank 31, there are flow guiding plates 26 and a second HTM inlet pipe 16. HTM is injected through the second HTM inlet pipe 16 to keep the heat in the reactor and ensure the temperature in the reactor.

[0032] There are two flow guiding plates 26, one end of which is respectively fixed on the left side and the right side of the heat preservation tank 31. HTM enters the heat preservation tank 31 through the second HTM inlet pipe 16 and flows out from the second HTM outlet pipe 20 through the diversion of the flow guiding plates 26.

[0033] The second HTM inlet pipe 16 is in an "L" shape. One side of the pipe leads into the lower end of the heat preservation tank 31 and extends to the lower part of the lowermost flow guiding plate 26 to introduce HTM into the heat preservation tank 31 and ensure the temperature in the reactor.

[0034] At the upper end of the heat preservation tank 31, there is a closed cover 32. One side of the closed cover 32 close to the stirring shaft 23 is a cavity. At the lower end of the cavity, there is heat insulation material 25. At the upper end of the closed cover 32, a cooling water inlet pipe 17 and a cooling water outlet pipe 19 are fixed. Cooling water enters the cavity through the cooling water inlet pipe 17 and contacts the heat insulation material 25 to prevent the loss of temperature in the reactor. After cooling is completed, the cooling water flows out from the cooling water outlet pipe 19.

[0035] The motor 18 is arranged above the closed cover 32. After the power is turned on, the stirring shaft 23 connected to the output end rotates to drive the stirring blades 24 to stir the materials in the reactor, making the materials mix evenly and the reaction proceed better.

[0036] As Figure 1 、 4 As shown in 5 and 6, inside the cavity of the housing 1, there is an HTM heat preservation layer 22. At the lower end, there are a first HTM steam inlet pipe 4 and a first HTM steam outlet pipe 6; on the side, there are a second HTM steam inlet pipe 5, a second HTM steam outlet pipe 8 and a third ventilation opening 9. HTM steam enters the HTM heat preservation layer 22 through the first HTM steam inlet pipe 4 and the first HTM steam outlet pipe 6. The steam fills the HTM heat preservation layer 22 and wraps the housing 1, providing heat for the materials and also providing heat for the HTM in the inner coil 10, providing heat for the whole reaction and being able to keep warm continuously, preventing the materials from sticking during the reaction process and contributing to the normal progress of the reaction. After the HTM steam cools, it flows out through the first HTM steam outlet pipe 6 and the second HTM steam outlet pipe 8. At the same time, the gas generated during the HTM heat transfer process is discharged through the third ventilation opening 9.

[0037] The inside of the fixing plate 11 presents a cavity. The lower end is communicated with the inner coil 10, and at the upper end, there is a first ventilation opening 13. HTM flows through the cavity inside the fixing plate 11 and flows mutually with the inner coil 10 with the same cavity to provide heat for the reaction process and flows out through the first HTM outlet pipe 3 after heat transfer.

[0038] During the HTM heat transfer process inside the inner coil 10, gas is generated, and the gas is discharged through the first vent 13 and the second vent 21. The second vent 21 is provided at the upper end of the first HTM inlet pipe 2.

[0039] The inner coil 10 includes an annular pipe and vertical pipes. The annular pipes are arranged in sequence to form a ring, and both ends of the vertical pipes communicate with the annular pipes and are evenly arranged. The pipes are the same as the fixed plate 11 and the first HTM inlet pipe. HTM enters from the first HTM inlet pipe 2 and flows into the inner coil 10, and then is discharged through the first HTM outlet pipe to keep the reaction warm and provide heat to prevent the material from sticking.

[0040] As Figure 1 and Figure 3 shown. The material is fed into the reactor through the feed port 27, and after stirring, it is discharged from the discharge port 7.

[0041] The gas generated during the reaction in the reactor is discharged through the steam outlet 28.

[0042] During feeding, the feeding time and feeding amount are controlled through the first sight glass port 29 and the second sight glass port 30 to ensure the progress of the polycondensation reaction.

[0043] The usage method of the present utility model is as follows: The material is put into the reactor through the feed port 27. The motor 18 is powered on, and the output end is connected to the stirring shaft 23, and then rotates to drive the stirring blade 24 to stir the raw materials. During the reaction process, HTM enters the inner coil 10 through the first HTM inlet pipe 2 to keep the material warm, and after the reaction ends, it flows out from the first HTM outlet pipe 3; HTM steam is introduced through the first HTM steam inlet pipe 4 and the second HTM steam inlet pipe 5 to achieve the effects of heating up and keeping warm, and transfer heat for the HTM inside the inner coil 10. During the stirring process, the material continuously contacts the inner coil 10 to provide heat to ensure the progress of the polycondensation reaction. Moreover, a heat preservation tank 31 is provided at the upper end of the housing 1, and HTM is injected through the second HTM inlet pipe 16 to achieve the heat preservation effect again. Cooling water is introduced into the closed cover 32 at the upper end of the heat preservation tank 31 through the cooling water inlet pipe, and combined with the heat insulation material 25 to further achieve the heat preservation effect. The temperature inside the reactor is ensured by the thermometer 12 to make the polycondensation reaction proceed normally.

[0044] The above specific implementation manner is only a preferred embodiment of the present utility model, and is not used to limit the implementation and the scope of the claims of the present utility model. Any equivalent changes and modifications made based on the content of the patent protection scope of the present utility model shall be included within the scope of the patent application of the present utility model.

Claims

1. A melt polycondensation reactor, characterized in that: The invention comprises a shell (1), an inner coil (10) and a stirring device arranged inside the shell (1); the inner coil (10) is connected to a first HTM inlet pipe (2) and a first HTM outlet pipe (3); the HTM enters the inner coil (10) through the first HTM inlet pipe (2) to keep the material warm, and flows out from the first HTM outlet pipe (3) after the reaction is completed.

2. The melt polycondensation reactor according to claim 1, characterized in that An additive inlet pipe (15) and a heat preservation tank (31) are provided at the upper end of the shell (1).

3. The melt polycondensation reactor according to claim 2, characterized in that The heat preservation tank (31) is provided with a guide plate (26) and a second HTM inlet pipe (16) inside, and a closing cover (32) at the upper end.

4. The melt polycondensation reactor according to claim 3, characterized in that The side of the closing cover (32) close to the stirring shaft (23) is a cavity, and a heat insulating material (25) is provided at the lower end of the cavity.

5. The melt polycondensation reactor according to claim 4, characterized in that A cooling water inlet pipe (17) and a cooling water outlet pipe (19) are provided above the closing cover (32).

6. The melt polycondensation reactor according to claim 1, characterized in that: An HTM thermal insulation layer (22) is provided in the cavity of the shell (1).

7. The melt polycondensation reactor according to claim 1, characterized in that A fixing plate (11) is provided at the upper end of the first HTM outlet pipe (3).

8. The melt polycondensation reactor according to claim 7, characterized in that The interior of the fixed plate (11) is hollow, the lower end is in communication with the inner coil (10), and the upper end is provided with a first ventilation opening (13).

9. The melt polycondensation reactor according to claim 1, characterized in that: A second ventilation opening (21) is provided at the upper end of the first HTM inlet pipe (2).

10. The melt polycondensation reactor according to claim 1, characterized in that The lower end of the shell (1) is provided with a first HTM steam inlet pipe (4) and a first HTM steam outlet pipe (6); the side surface is provided with a second HTM steam inlet pipe (5), a second HTM steam outlet pipe (8) and a third ventilation port (9).

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