An esterification reactor for polyester fiber production

Abstract

The utility model discloses an esterification reation kettle of polyester fiber production relates to the technical field of reation kettle, including the kettle body, the top of kettle body is equipped with the kettle cover, the bottom of kettle cover is provided with the mixing subassembly, the bottom of kettle body is connected with the discharge pipe, the outside of discharge pipe is provided with the solenoid valve, the outside of discharge pipe is provided with the protective housing. The utility model has the advantages that: through the first bevel gear rotation drives second bevel gear and third bevel gear reverse rotation to drive the stirring frame and first stirring vane and carry out different direction rotation, improve material mixing effect, reduce the reaction dead zone, and the second stirring vane is used in cooperation with the first stirring vane, forms the shear flow field, and the mixing effect is strengthened, and the connecting frame and the scraping ring are rotated through the transmission gear, make the scraping ring rotate in the discharge pipe, and the discharge pipe is dredged and the adhering object is scraped, avoids the problem that the discharge pipe produces the blockage.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and in particular to an esterification reaction vessel for polyester fiber production. Background Technology

[0002] Polyester fiber production is a process of converting raw materials into fibers through chemical synthesis and physical processing. Its core raw materials are terephthalic acid (PTA) and ethylene glycol (EG). The two undergo esterification and polycondensation reactions under high temperature and pressure to produce polyethylene terephthalate (PET) polymer. The production process covers four stages: raw material preparation, polymerization reaction, melt spinning, and post-processing.

[0003] Esterification reactors are core equipment in polyester fiber production. Existing reactors typically rely on stirring blades to mix materials and ensure uniformity. However, the fixed rotation direction of the stirring blades prevents mixing in different directions. Fixed-direction stirring creates a single-directional flow field, resulting in a limited circulation path for the material within the reactor. Areas near the reactor wall and stirring shaft, with low flow rates and high viscosity, such as the initial stages of the esterification reaction, easily become "dead zones." Insufficient contact between reactants and uneven dispersion of materials with significant density differences leads to localized high or low concentrations. Furthermore, the poor permeability of some high-viscosity materials causes them to adhere to the discharge pipe, potentially leading to blockages and production interruptions over time, thus impacting efficiency. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An esterification reactor for polyester fiber production includes a reactor body, a reactor cover installed on the top of the reactor body, a mixing component installed at the bottom of the reactor cover, a discharge pipe connected to the bottom of the reactor body, a solenoid valve installed on the outside of the discharge pipe, a protective shell installed on the outside of the discharge pipe, a mounting bracket fixed on one side of the protective shell, a transmission gear rotatably connected to the outside of the discharge pipe, a connecting bracket fixed at the bottom of the transmission gear, and a scraper ring for unblocking the discharge pipe fixed on one side of the connecting bracket.

[0007] The mixing assembly includes a sleeve that rotates on the inner wall of the vessel lid. A stirring frame is fixed to the bottom of the sleeve, and a rotating rod is rotatably connected to the inner wall of the sleeve. Multiple sets of first stirring blades are fixed to the outer side of the rotating rod, and a driving component is provided at the top of the sleeve.

[0008] In a preferred embodiment of the esterification reactor for producing polyester fiber according to the present invention, the inner wall of the stirring frame is fixed with a second stirring blade that cooperates with the first stirring blade, and the outer side of the stirring frame is fixed with a scraper for cleaning the inner wall of the reactor.

[0009] In a preferred embodiment of the esterification reactor for producing polyester fiber according to the present invention, the top of the reactor cover is fixed with a shell, the inner wall of the shell is fixed with a fixing frame, and the outer sides of the sleeve and the rotating rod are rotatably connected to the inner wall of the fixing frame.

[0010] In a preferred embodiment of the esterification reactor for producing polyester fiber according to the present invention, the driving component includes a first motor fixed to one side of the fixed frame, and a first bevel gear is fixed to the output end of the first motor.

[0011] As a preferred embodiment of the esterification reactor for polyester fiber production according to the present invention, a second bevel gear is fixed to the outer side of the rotating rod, a third bevel gear is fixed to the outer side of the sleeve, and the outer sides of the second bevel gear and the third bevel gear are both meshed with the outer side of the first bevel gear, and the second bevel gear and the third bevel gear are designed to be symmetrically arranged.

[0012] In a preferred embodiment of the esterification reactor for producing polyester fiber according to the present invention, a second motor is fixed to the top of the protective shell, and a drive gear for driving the transmission gear to rotate is fixed to the output end of the second motor, and the outer side of the drive gear is meshed with the outer side of the transmission gear.

[0013] In a preferred embodiment of the esterification reactor for producing polyester fiber according to the present invention, the inner wall of the reactor body is connected to a feed inlet, and a support frame is fixed on the outer side of the reactor body.

[0014] The beneficial effects of this utility model are as follows: the rotation of the first bevel gear drives the second and third bevel gears to rotate in opposite directions, thereby driving the stirring frame and the first stirring blade to rotate in different directions, improving the material mixing effect and reducing the reaction dead zone. The second stirring blade works in conjunction with the first stirring blade to form a shear flow field, which enhances the mixing effect. The transmission gear drives the connecting frame and the scraper ring to rotate, so that the scraper ring rotates inside the discharge pipe to unclog the discharge pipe and scrape off the adhering material, thus avoiding the problem of blockage in the discharge pipe. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0016] Figure 1 A schematic diagram of the overall structure of the esterification reactor for polyester fiber production.

[0017] Figure 2 A schematic diagram of the structure of the reactor body in the esterification reactor for polyester fiber production.

[0018] Figure 3 A schematic diagram of the structure of the reactor lid in the esterification reactor for polyester fiber production.

[0019] Figure 4 A schematic diagram of the discharge pipe in the esterification reactor for polyester fiber production.

[0020] Labels in the diagram: 1. Vessel body; 2. Vessel lid; 3. Mixing component; 31. Sleeve; 32. Stirring frame; 33. Rotating rod; 34. First stirring blade; 35. Drive component; 351. First motor; 352. First bevel gear; 353. Second bevel gear; 354. Third bevel gear; 4. Mounting frame; 5. Discharge pipe; 6. Solenoid valve; 7. Protective shell; 8. Transmission gear; 9. Connecting frame; 10. Scraper ring; 11. Second stirring blade; 12. Scraper; 13. Shell; 14. Fixing frame; 15. Second motor; 16. Drive gear; 17. Feed inlet; 18. Support frame. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0024] Example 1:

[0025] Reference Figures 1-4 This is the first embodiment of the present invention. This embodiment provides an esterification reactor for polyester fiber production, including a reactor body 1, a reactor cover 2 installed on the top of the reactor body 1, a mixing component 3 provided at the bottom of the reactor cover 2, a discharge pipe 5 connected to the bottom of the reactor body 1, a solenoid valve 6 provided on the outside of the discharge pipe 5, a protective shell 7 provided on the outside of the discharge pipe 5, a mounting bracket 4 fixed on one side of the protective shell 7, a transmission gear 8 rotatably connected to the outside of the discharge pipe 5, a connecting bracket 9 fixed at the bottom of the transmission gear 8, and a scraper ring 10 fixed on one side of the connecting bracket 9 for clearing the discharge pipe 5.

[0026] The mixing component 3 achieves the effect of mixing and stirring the materials inside the vessel 1. It can also perform bidirectional stirring of the materials according to the different rotation directions of different blades, thereby improving the mixing effect. The reacted materials can be discharged through the discharge pipe 5. The rotation of the transmission gear 8 can drive the connecting frame 9 and the scraper ring 10 to rotate, so that the scraper ring 10 rotates inside the discharge pipe 5 to unclog the discharge pipe 5 and scrape off the adhering materials, thus avoiding the problem of blockage in the discharge pipe 5.

[0027] The mixing assembly 3 includes a sleeve 31 that rotates on the inner wall of the lid 2. A stirring frame 32 is fixed to the bottom of the sleeve 31. A rotating rod 33 is rotatably connected to the inner wall of the sleeve 31. Multiple sets of first stirring blades 34 are fixed to the outer side of the rotating rod 33. A driving component 35 is provided on the top of the sleeve 31.

[0028] The drive component 35 can drive the sleeve 31 and the rotating rod 33 to rotate in opposite directions, so that the stirring frame 32 and the first stirring blade 34 can rotate in different directions, thereby improving the material mixing effect and reducing the reaction dead zone.

[0029] Example 2:

[0030] This is the second embodiment of the present invention, which is based on the previous embodiment.

[0031] Specifically, the inner wall of the stirring frame 32 is fixed with a second stirring blade 11 that works in conjunction with the first stirring blade 34, and the outer side of the stirring frame 32 is fixed with a scraper 12 for cleaning the inner wall of the vessel body 1.

[0032] The rotation of the stirring frame 32 can drive the second stirring blade 11 to rotate, so that the second stirring blade 11 works in conjunction with the first stirring blade 34 to form a shear flow field and enhance the mixing effect. The rotation of the stirring frame 32 drives the scraper 12 to rotate, and the scraper 12 cleans the material on the wall surface, improving the mixing reaction effect of the material inside the vessel 1.

[0033] Specifically, a shell 13 is fixed to the top of the lid 2, and a fixing frame 14 is fixed to the inner wall of the shell 13. The outer sides of the sleeve 31 and the rotating rod 33 are rotatably connected to the inner wall of the fixing frame 14.

[0034] The fixed bracket 14 can support the sleeve 31 and the rotating rod 33, thereby improving the stability of the sleeve 31 and the rotating rod 33 when they rotate.

[0035] Specifically, the drive component 35 includes a first motor 351 fixed to one side of the mounting bracket 14, and a first bevel gear 352 is fixed to the output end of the first motor 351.

[0036] The first motor 351 can drive the first bevel gear 352 to rotate, which facilitates the subsequent rotation of the sleeve 31 and the rotating rod 33.

[0037] Specifically, a second bevel gear 353 is fixed to the outer side of the rotating rod 33, and a third bevel gear 354 is fixed to the outer side of the sleeve 31. The outer sides of the second bevel gear 353 and the third bevel gear 354 are both meshed with the outer side of the first bevel gear 352, and the second bevel gear 353 and the third bevel gear 354 are designed to be symmetrical.

[0038] The rotation of the first bevel gear 352 drives the second bevel gear 353 and the third bevel gear 354 to rotate in opposite directions, thereby driving the stirring frame 32 and the first stirring blade 34 to rotate in different directions, improving the material mixing effect and reducing the reaction dead zone.

[0039] Example 3:

[0040] This is the third embodiment of the present invention, which is based on the first two embodiments.

[0041] Specifically, a second motor 15 is fixed to the top of the protective shell 7, and a drive gear 16 for driving the transmission gear 8 to rotate is fixed to the output end of the second motor 15, and the outer side of the drive gear 16 is meshed with the outer side of the transmission gear 8.

[0042] The second motor 15 can drive the drive gear 16 and the transmission gear 8 to rotate. The transmission gear 8 drives the connecting frame 9 and the scraper ring 10 to rotate, so that the scraper ring 10 rotates inside the discharge pipe 5 to clear the discharge pipe 5 and scrape off the adhering material, thus avoiding the problem of blockage in the discharge pipe 5.

[0043] Specifically, the inner wall of the vessel body 1 is connected to the feed inlet 17, and the outer side of the vessel body 1 is fixed with a support frame 18.

[0044] Polyester fiber production materials can be fed into the reactor body 1 through the feed inlet 17, and the reactor body 1 is supported by the support frame 18 to improve the stability of the reactor body 1.

[0045] In use, polyester fiber production materials can be fed into the reactor body 1 through the feed inlet 17. The first motor 351 drives the first bevel gear 352 to rotate. The rotation of the first bevel gear 352 drives the second bevel gear 353 and the third bevel gear 354 to rotate in opposite directions, thereby driving the stirring frame 32 and the first stirring blade 34 to rotate in different directions, improving the material mixing effect and reducing the reaction dead zone. The rotation of the stirring frame 32 drives the second stirring blade 11 to rotate, so that the second stirring blade 11 and the first stirring blade 34 work together to form a shear flow field and enhance the mixing effect. The rotation of the stirring frame 32 drives the scraper 12 to rotate, which cleans the material on the wall surface and improves the mixing reaction effect of the material inside the reactor body 1. The reacted material can be discharged through the discharge pipe 5. The second motor 15 drives the drive gear 16 and the transmission gear 8 to rotate. The transmission gear 8 drives the connecting frame 9 and the scraper ring 10 to rotate, so that the scraper ring 10 rotates inside the discharge pipe 5 to unclog the discharge pipe 5 and scrape off the adhering material, avoiding the problem of blockage in the discharge pipe 5.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An esterification reactor for polyester fiber production, comprising a reactor body (1), characterized in that: The top of the vessel body (1) is equipped with a vessel cover (2), and the bottom of the vessel cover (2) is provided with a mixing component (3). The bottom of the vessel body (1) is connected to a discharge pipe (5). A solenoid valve (6) is provided on the outside of the discharge pipe (5). A protective shell (7) is provided on the outside of the discharge pipe (5). A mounting bracket (4) is fixed on one side of the protective shell (7). A transmission gear (8) is rotatably connected to the outside of the discharge pipe (5). A connecting bracket (9) is fixed at the bottom of the transmission gear (8). A scraper ring (10) for clearing the discharge pipe (5) is fixed on one side of the connecting bracket (9). The mixing component (3) includes a sleeve (31) that rotates on the inner wall of the lid (2). A stirring rack (32) is fixed at the bottom of the sleeve (31). A rotating rod (33) is rotatably connected to the inner wall of the sleeve (31). Multiple sets of first stirring blades (34) are fixed on the outer side of the rotating rod (33). A driving component (35) is provided at the top of the sleeve (31).

2. The esterification reactor for polyester fiber production as described in claim 1, characterized in that: The inner wall of the stirring frame (32) is fixed with a second stirring blade (11) that works in conjunction with the first stirring blade (34), and the outer side of the stirring frame (32) is fixed with a scraper (12) for cleaning the inner wall of the vessel body (1).

3. The esterification reactor for polyester fiber production as described in claim 1, characterized in that: The top of the lid (2) is fixed with a shell (13), and the inner wall of the shell (13) is fixed with a fixing frame (14). The outer sides of the sleeve (31) and the rotating rod (33) are rotatably connected to the inner wall of the fixing frame (14).

4. The esterification reactor for polyester fiber production as described in claim 3, characterized in that: The drive unit (35) includes a first motor (351) fixed to one side of the fixing frame (14), and a first bevel gear (352) is fixed to the output end of the first motor (351).

5. The esterification reactor for polyester fiber production as described in claim 4, characterized in that: The outer side of the rotating rod (33) is fixed with a second bevel gear (353), and the outer side of the sleeve (31) is fixed with a third bevel gear (354). The outer sides of the second bevel gear (353) and the third bevel gear (354) are both meshed with the outer side of the first bevel gear (352). The second bevel gear (353) and the third bevel gear (354) are designed to be symmetrical.

6. The esterification reactor for polyester fiber production as described in claim 1, characterized in that: The top of the protective shell (7) is fixed with a second motor (15), and the output end of the second motor (15) is fixed with a drive gear (16) for driving the transmission gear (8) to rotate, and the outer side of the drive gear (16) is meshed with the outer side of the transmission gear (8).

7. The esterification reactor for polyester fiber production as described in claim 1, characterized in that: The inner wall of the vessel body (1) is connected to the feed inlet (17), and the outer side of the vessel body (1) is fixed with a support frame (18).

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