Reaction device for preparing fluorine-containing monomer

Abstract

The reaction device comprises a kettle body and a stirring mechanism, the stirring mechanism comprises a stirring shaft and a stirring assembly arranged on the stirring shaft, a driving unit is arranged at the top of the kettle body, the stirring shaft is connected with the driving unit, the stirring assembly comprises a blade stirring piece and a U-shaped stirring component, and the blade stirring piece is connected with the U-shaped stirring component. The blade stirring part is arranged right above the U-shaped stirring component, the U-shaped stirring component comprises a first U-shaped part and a second U-shaped part which are vertically arranged, and the size of the first U-shaped part is smaller than that of the second U-shaped part in the radial direction of the kettle body. According to the reaction device provided by the utility model, the effect of stirring and mixing the raw materials in the kettle body can be improved through mutual matching of the blade stirring piece and the U-shaped stirring component, so that the raw materials in the kettle body are fully mixed, the raw materials in the tank body can fully react, and the reaction production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of preparation of fluorine-containing monomers, in particular to a reaction device for preparing fluorine-containing monomers. Background Art

[0002] Fluorine-containing monomers are a class of compounds containing fluorine atoms in their molecular structures, with various excellent properties such as low surface energy, high corrosion resistance, and high permeability. These characteristics make fluorine-containing monomers have wide application values in multiple fields. Important fluorine-containing monomers include tetrafluoroethylene (TFE), chlorotrifluoroethylene (HFP), vinylidene fluoride (VDF), chlorotrifluoroethylene (CTFE), and perfluoroalkyl vinyl ether (HFPO), etc. Among them, tetrafluoroethylene is the most basic and common fluorine-containing polymer monomer, which is widely used in manufacturing various plastic products, reinforced plastics, coatings and other products. In addition, fluorine-containing monomers are also applied to synthesize polyimide (PI), and such materials have attracted much attention due to their excellent thermal stability, electrical properties, and chemical resistance.

[0003] When producing fluorine-containing monomers, a reaction device is used. The existing reaction devices are generally carried out in a reaction tank or a reaction kettle. For example, in a patent application with the authorization announcement number CN 213557022U and the name of a reaction device for preparing fluorine-containing monomers, it includes a tank body. There is a fixed seat at the upper part of the tank body, a driving motor is arranged on the upper part of the fixed seat, a stirring shaft is arranged inside the tank body, one end of the stirring shaft penetrates through the top of the tank body to connect the output end of the driving motor, stirring blades are arranged on the outer circumferential surface of the stirring shaft, a cross bar is integrally connected to the bottom end of the stirring shaft, a connecting rod is fixedly connected to the end of the cross bar far away from the stirring shaft, a brush is arranged on the connecting rod, feeding ports are arranged on both sides of the upper part of the tank body, a discharge port is arranged at the bottom of the tank body, a control panel is arranged on the outer wall of the tank body, legs are arranged at the bottom of the tank body, and a base is arranged at the bottom of the legs. When the fluorine-containing monomers react inside the tank body, it is necessary to mix and stir through the stirring shaft and the stirring blades. The existing stirring mechanisms often have the situation of insufficient mixing, resulting in the raw materials inside the tank body not being able to react fully, so that the raw materials need to be reacted for a second time, reducing the production efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a reaction device for preparing fluorine-containing monomers to solve the above deficiencies in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A reaction device for preparing fluorine-containing monomers, comprising a kettle body, a feed inlet is arranged at the top of the kettle body, a discharge outlet is arranged at the bottom of the kettle body, a heating structure is arranged on the side wall of the kettle body, and further comprising a stirring mechanism, the stirring mechanism includes a stirring shaft and a stirring component arranged on the stirring shaft, a driving unit is arranged at the top of the kettle body, the stirring shaft is connected with the driving unit, the stirring component includes a blade stirring member and a U-shaped stirring member, the blade stirring member is arranged directly above the U-shaped stirring member, the U-shaped stirring member includes a first U-shaped member and a second U-shaped member arranged vertically, along the radial direction of the kettle body, the size of the first U-shaped member is smaller than that of the second U-shaped member.

[0007] In the above reaction device, the blade stirring member includes a cylindrical mounting member and a plurality of arc-shaped blades arranged on the cylindrical mounting member, and the plurality of arc-shaped blades are arranged at intervals in sequence along the circumferential direction of the cylindrical mounting member.

[0008] In the above reaction device, both the first U-shaped member and the second U-shaped member include a bottom member and side members arranged on both sides of the bottom member, and the side members are vertically arranged with respect to the bottom member.

[0009] In the above reaction device, a mounting sleeve is arranged at the middle position of the bottom member, and the mounting sleeve is fixedly installed on the stirring shaft.

[0010] In the above reaction device, a cylindrical mounting seat is arranged on the stirring shaft, and the tops of the side members of the first U-shaped member and the second U-shaped member are fixedly connected to the cylindrical mounting seat through connecting rods.

[0011] The above reaction device further includes a scraping component, which is detachably installed on the side member of the second U-shaped member and is used for scraping the residues on the inner wall of the kettle body.

[0012] In the above reaction device, the scraping component includes a side mounting frame and a scraping member, a vertical opening groove is arranged on the side member of the second U-shaped member, the side mounting frame includes an arc-shaped frame body, and a strip-shaped mounting plate is arranged on the arc-shaped frame body, and the strip-shaped mounting plate can be inserted and installed in the vertical opening groove.

[0013] In the above reaction device, the scraping member is a cylindrical scraping body, the cylindrical scraping body is rotatably installed in the arc-shaped frame body, and a part of the cylindrical scraping body extends out of the arc-shaped frame body to form a scraping structure.

[0014] The above reaction device, the cylindrical scraping body is provided with a first arc-shaped scraping plate and a second arc-shaped scraping plate along the circumferential direction. The first arc-shaped scraping plate is formed with a first radial scraping structure along the radial direction of the cylindrical scraping body, and the second arc-shaped scraping plate is formed with a second radial scraping structure along the radial direction of the cylindrical scraping body. The size of the first radial scraping structure is larger than that of the second radial scraping structure.

[0015] The above reaction device further includes a torsion spring, which is arranged between the cylindrical scraping body and the arc-shaped frame body. The torsion spring can be driven to make the first radial scraping structure parallel to the side member of the second U-shaped member.

[0016] In the above technical solution, the reaction device for preparing fluorine-containing monomers provided by the present utility model includes a kettle body and a stirring mechanism. The stirring mechanism includes a stirring shaft and a stirring component arranged on the stirring shaft. The stirring shaft is connected to a driving unit at the top of the kettle body. The stirring component includes a blade stirring member and a U-shaped stirring member. The blade stirring member is arranged directly above the U-shaped stirring member. The U-shaped stirring member includes a first U-shaped member and a second U-shaped member arranged vertically. Along the radial direction of the kettle body, the size of the first U-shaped member is smaller than that of the second U-shaped member, and the stirring ranges of the first U-shaped member and the second U-shaped member are different. In this way, through the mutual cooperation of the blade stirring member and the U-shaped stirring member, the stirring and mixing effect of the raw materials in the kettle body can be improved, so that the raw materials in the kettle body are fully mixed, and the raw materials inside the tank can react sufficiently, thereby improving the reaction production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0018] Figure 1 It is a schematic structural diagram of the reaction device for preparing fluorine-containing monomers provided by the embodiment of the present utility model;

[0019] Figure 2 It is a schematic internal structure diagram of the kettle body provided by the embodiment of the present utility model;

[0020] Figure 3 It is a schematic installation diagram of the stirring mechanism provided by another embodiment of the present utility model;

[0021] Figure 4 It is a schematic structural diagram of the scraping component provided by another embodiment of the present utility model;

[0022] Figure 5 It is a schematic structural diagram of the cylindrical scraping body provided by another embodiment of the present utility model.

[0023] Description of the reference numerals:

[0024] 1. Kettle body; 11. Feed inlet; 12. Discharge outlet; 13. Driving unit; 2. Stirring mechanism; 21. Stirring shaft; 22. Blade stirring member; 3. U-shaped stirring member; 31. First U-shaped member; 32. Second U-shaped member; 33. Side member; 34. Bottom member; 35. Connecting rod; 4. Scraping assembly; 41. Side mounting bracket; 42. Scraping member; 43. Arc-shaped frame; 44. Strip-shaped mounting plate; 45. Cylindrical scraping body; 46. First arc-shaped scraping plate; 461. First radial scraping structure; 47. Second arc-shaped scraping plate; 471. Second radial scraping structure; 48. Torsion spring. Detailed implementation manners

[0025] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] As Figures 1-5 shown, the present utility model provides a reaction device for preparing fluorine-containing monomers, including a kettle body 1 and a stirring mechanism 2. A feed inlet 11 is provided at the top of the kettle body 1, a discharge outlet 12 is provided at the bottom of the kettle body 1, a heating structure is provided on the side wall of the kettle body 1. The stirring mechanism 2 includes a stirring shaft 21 and a stirring component provided on the stirring shaft 21. A driving unit 13 is provided at the top of the kettle body 1, the stirring shaft 21 is connected to the driving unit 13. The stirring component includes a blade stirring member 22 and a U-shaped stirring member 3. The blade stirring member 22 is arranged directly above the U-shaped stirring member 3. The U-shaped stirring member 3 includes a vertically arranged first U-shaped member 31 and a second U-shaped member 32. Along the radial direction of the kettle body 1, the size of the first U-shaped member 31 is smaller than that of the second U-shaped member 32.

[0027] Specifically, the feed inlet 11 is provided at the top of the kettle body 1 for transporting the raw materials for preparing fluorine-containing monomers into the kettle body 1. The feed inlet 11 can be one, two or more according to needs. The discharge outlet 12 is provided at the bottom of the kettle body 1. Through the discharge outlet 12, the fluorine-containing monomers after the reaction in the kettle body 1 can be output. A sandwich layer is provided on the side wall of the kettle body 1, and the heating structure is arranged in the sandwich layer. Through the heating structure, the kettle body 1 can be heated. The heating structure can adopt methods such as electric heating and steam heating. This is the prior art and will not be elaborated.

[0028] In this embodiment, a stirring mechanism 2 is arranged inside the kettle body 1. The stirring mechanism 2 is used to stir the raw materials inside the kettle body 1. A driving unit 13 is arranged at the top of the kettle body 1. The stirring mechanism 2 includes a stirring shaft 21 and a stirring assembly arranged on the stirring shaft 21. The stirring shaft 21 is arranged at the central position of the kettle body 1 and is connected to the driving unit 13. In this way, the stirring shaft 21 can rotate under the drive of the driving unit 13. The stirring assembly includes a blade stirring member 22 and a U-shaped stirring member. The U-shaped stirring member is arranged at the bottom of the stirring shaft 21, and the blade stirring member 22 is arranged directly above the U-shaped stirring member. The blade stirring member 22 includes a cylindrical mounting member and a plurality of stirring blades arranged on the cylindrical mounting member. The inside of the kettle body 1 can be stirred and mixed by the plurality of stirring blades.

[0029] In this embodiment, the U-shaped stirring member 3 includes a first U-shaped member 31 and a second U-shaped member 32. The first U-shaped member 31 and the second U-shaped member 32 are vertically arranged. The bottom of the stirring shaft 21 is connected to both the first U-shaped member 31 and the second U-shaped member 32, and the sizes of the first U-shaped member 31 and the second U-shaped member 32 are different. Along the radial direction of the kettle body 1, the size of the first U-shaped member 31 is smaller than that of the second U-shaped member 32. In this way, the stirring ranges of the first U-shaped member 31 and the second U-shaped member 32 are different, and the raw materials in the kettle body 1 can be fully stirred and mixed, avoiding the raw materials from piling up together and improving the stirring effect.

[0030] The reaction device for preparing fluorine-containing monomers provided by the utility model includes a kettle body 1 and a stirring mechanism 2. The stirring mechanism 2 includes a stirring shaft 21 and a stirring assembly arranged on the stirring shaft 21. The stirring shaft 21 is connected to a driving unit 13 at the top of the kettle body 1. The stirring assembly includes a blade stirring member 22 and a U-shaped stirring member 3. The blade stirring member 22 is arranged directly above the U-shaped stirring member 3. The U-shaped stirring member 3 includes a first U-shaped member 31 and a second U-shaped member 32 which are vertically arranged. Along the radial direction of the kettle body 1, the size of the first U-shaped member 31 is smaller than that of the second U-shaped member 32. The stirring ranges of the first U-shaped member 31 and the second U-shaped member 32 are different. In this way, through the mutual cooperation of the blade stirring member 22 and the U-shaped stirring member 3, the stirring and mixing effect of the raw materials in the kettle body 1 can be improved, so that the raw materials in the kettle body 1 are fully mixed, and the raw materials inside the tank can react sufficiently, improving the reaction production efficiency.

[0031] In this embodiment, preferably, the blade stirring member 22 includes a cylindrical mounting member and a plurality of arc-shaped blades arranged on the cylindrical mounting member. The plurality of arc-shaped blades are arranged at intervals in the circumferential direction of the cylindrical mounting member in turn; the cylindrical mounting member can be fixedly mounted on the stirring shaft 21, and the arc-shaped blades are inclined in the radial direction of the cylindrical mounting member. In this way, when the stirring shaft 21 rotates, the arc-shaped blades can not only stir and mix the chemical raw materials but also provide an axial driving force along the axial direction of the stirring shaft 21, so that the raw materials in the kettle body 1 are pushed to move downward.

[0032] In this embodiment, preferably, both the first U-shaped member 31 and the second U-shaped member 32 include a bottom member 34 and side members 33 provided on both sides of the bottom member 34. The side members 33 are perpendicularly connected to the bottom member 34, and an installation sleeve is provided at the middle position of the bottom member 34. The installation sleeve is fixedly installed on the stirring shaft 21. In this way, the stirring shaft 21 is installed at the middle position between the first U-shaped member 31 and the second U-shaped member 32, separating the first U-shaped member 31 and the second U-shaped member 32 into left and right parts respectively. The bottom members 34 of the first U-shaped member 31 and the second U-shaped member 32 form a cross-shaped stirring structure. During the rotation of the stirring shaft 21, the bottom members 34 of the first U-shaped member 31 and the second U-shaped member 32 stir the interior of the kettle body 1, so that the raw materials at the bottom of the kettle body 1 are stirred and mixed, avoiding the accumulation of raw materials at the bottom of the kettle body 1. The side members 33 of the first U-shaped member 31 and the second U-shaped member 32, and the distance between the side member 33 of the first U-shaped member 31 and the stirring shaft 21 is less than the distance between the side member 33 of the second U-shaped member 32 and the stirring shaft 21. In this way, the stirring ranges of the side member 33 of the first U-shaped member 31 and the side member 33 of the second U-shaped member 32 are different, realizing full stirring and mixing of the raw materials inside the kettle body 1.

[0033] In this embodiment, preferably, a cylindrical mounting seat is provided on the stirring shaft 21. The tops of the side members 33 of the first U-shaped member 31 and the second U-shaped member 32 are fixedly connected to the cylindrical mounting seat through connecting rods 35. There are two connecting rods 35 on both the first U-shaped member 31 and the second U-shaped member 32, and the four connecting rods 35 form a cross-shaped connection structure, thereby increasing the connection strength between the first U-shaped member 31 and the second U-shaped member 32 and the stirring shaft 21. At the same time, during the rotation process through the cross-shaped connection structure, it is also possible to stir and mix the raw materials in the kettle body 1.

[0034] In this embodiment, preferably, a scraping assembly 4 is further included, which is detachably installed on the side member 33 of the second U-shaped member 32 and is used to scrape the residues on the inner wall of the kettle body 1. The scraping assembly 4 can be installed on one side member 33 of the second U-shaped member 32, or can be installed on both side members 33 of the second U-shaped member 32. Through the scraping assembly 4, the residues on the inner wall of the kettle body 1 can be scraped, avoiding the accumulation of raw materials and reactants, etc. on the inner wall of the kettle body 1 during the stirring process.

[0035] In this embodiment, preferably, the scraping assembly 4 includes a side mounting frame 41 and a scraping member 42. A vertical opening groove is provided on the side member 33 of the second U-shaped member 32. The side mounting frame 41 includes an arc-shaped frame body 43. A strip-shaped mounting plate 44 is provided on the arc-shaped frame body 43. The strip-shaped mounting plate 44 can be inserted and mounted in the vertical opening groove. In this way, the strip-shaped mounting plate 44 is detachably mounted on the side mounting frame 41, which is convenient for replacing and repairing the side mounting frame 41 during use.

[0036] In this embodiment, preferably, the scraping member 42 is a cylindrical scraping body 45. The cylindrical scraping body 45 is rotatably mounted in the arc-shaped frame body 43. A part of the cylindrical scraping body 45 extends out of the arc-shaped frame body 43 to form a scraping structure. Mounting plates are provided at the top and bottom of the arc-shaped frame body 43. In this way, a semi-cylindrical mounting cavity is formed between the mounting plate and the arc-shaped frame. The cylindrical scraping body 45 is mounted in the mounting cavity. Mounting shafts are provided at the top and bottom of the cylindrical scraping body 45. The rotating mounting shafts are rotatably mounted on the mounting plates at the top and bottom of the arc-shaped frame. A torsion spring 48 is sleeved on the rotating mounting shaft. One end of the torsion spring 48 is fixedly connected to the mounting plate, and the other end is fixedly connected to the cylindrical scraping body 45. In this way, during use, when the cylindrical scraping body 45 encounters a large resistance, it can rotate in the mounting cavity. During the rotation, the torsion spring 48 is rotated and has elasticity. When the resistance on the cylindrical scraping body 45 becomes smaller, under the action of the torsion spring 48, the cylindrical scraping body 45 can rotate to the initial state.

[0037] In this embodiment, preferably, the cylindrical scraping body 45 is circumferentially provided with a first arc-shaped scraping plate 46 and a second arc-shaped scraping plate 47. The first arc-shaped scraping plate 46 is formed with a first radial scraping structure 461 along the radial direction of the cylindrical scraping body 45, and the second arc-shaped scraping plate 47 is formed with a second radial scraping structure 471 along the radial direction of the cylindrical scraping body 45. The size of the first radial scraping structure 461 is larger than that of the second radial scraping structure 471. When the torsion spring 48 is in the initial state, at this time, the first radial scraping structure 461 is parallel to the side member 33 of the second U-shaped member 32, and the distance between the first radial scraping structure 461 and the inner wall of the kettle body 1 is the smallest. However, at this time, there is a preset distance between the first radial scraping structure 461 and the inner wall of the kettle body 1. During the rotation of the stirring shaft 21, the first arc-shaped scraping plate 46 on the cylindrical scraping body 45 scrapes the residues on the inner wall of the kettle body 1. If the first arc-shaped scraping plate 46 encounters a large resistance, the cylindrical scraping body 45 will rotate, and the torsion spring 48 will rotate elastically. When the first arc-shaped scraping plate 46 rotates and deviates from the inner wall of the kettle body 1, the second arc-shaped scraping plate 47 rotates to a position corresponding to the inner wall of the kettle body 1. At this time, the second U-shaped member 32 rotates, and then the second arc-shaped scraping plate 47 will scrape the inner wall of the kettle body 1. However, since the preset distance between the second radial scraping structure 471 and the inner wall of the kettle body 1 is larger, the scraping resistance of the second arc-shaped scraping plate 47 will be smaller. When the resistance encountered by the cylindrical scraping body 45 becomes smaller, under the action of the torsion spring 48, the cylindrical scraping body 45 will rotate reversely to the initial position, so as to avoid damage to the first arc-shaped scraping plate 46 caused by encountering a large resistance during use.

[0038] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A reaction apparatus for preparing a fluorinated monomer, comprising a kettle body, wherein a feed inlet is arranged at the top of the kettle body, a discharge outlet is arranged at the bottom of the kettle body, and a heating structure is arranged on the side wall of the kettle body, characterized in that, It further includes a stirring mechanism, the stirring mechanism includes a stirring shaft and a stirring assembly arranged on the stirring shaft, a driving unit is arranged at the top of the kettle body, the stirring shaft is connected to the driving unit, the stirring assembly includes a blade stirring member and a U-shaped stirring member, the blade stirring member is arranged directly above the U-shaped stirring member, the U-shaped stirring member includes a vertically arranged first U-shaped member and a second U-shaped member, along the radial direction of the kettle body, the size of the first U-shaped member is smaller than that of the second U-shaped member.

2. The reaction device according to claim 1, wherein, The blade stirring member includes a cylindrical mounting member and a plurality of arc-shaped blades arranged on the cylindrical mounting member, and the plurality of arc-shaped blades are sequentially arranged at intervals along the circumferential direction of the cylindrical mounting member.

3. The reaction device according to claim 1, characterized in that, Both the first U-shaped member and the second U-shaped member include a bottom member and side members arranged on both sides of the bottom member, and the side members are vertically arranged with respect to the bottom member.

4. The reaction device according to claim 3, characterized in that, An installation sleeve is arranged at the middle position of the bottom member, and the installation sleeve is fixedly installed on the stirring shaft.

5. The reaction device according to claim 4, wherein, A cylindrical mounting seat is arranged on the stirring shaft, and the tops of the side members of the first U-shaped member and the second U-shaped member are fixedly connected to the cylindrical mounting seat through connecting rods.

6. The reaction device according to claim 3, wherein It further includes a scraping assembly, which is detachably installed on the side member of the second U-shaped member and is used for scraping the residues on the inner wall of the kettle body.

7. The reaction device according to claim 6, characterized in that, The scraping assembly includes a side mounting frame and a scraping member, a vertical opening groove is arranged on the side member of the second U-shaped member, the side mounting frame includes an arc-shaped frame body, and a strip-shaped mounting plate is arranged on the arc-shaped frame body, and the strip-shaped mounting plate can be inserted and installed in the vertical opening groove.

8. The reaction device according to claim 7, characterized in that, The scraping member is a cylindrical scraping body, the cylindrical scraping body is rotatably installed in the arc-shaped frame body, and a part of the cylindrical scraping body extends out of the arc-shaped frame body to form a scraping structure.

9. The reaction device according to claim 8, wherein, The cylindrical scraping body is provided with a first arc-shaped scraping plate and a second arc-shaped scraping plate along the circumferential direction, the first arc-shaped scraping plate is formed with a first radial scraping structure along the radial direction of the cylindrical scraping body, the second arc-shaped scraping plate is formed with a second radial scraping structure along the radial direction of the cylindrical scraping body, and the size of the first radial scraping structure is larger than that of the second radial scraping structure.

10. The reaction device according to claim 9, characterized in that, It further includes a torsion spring, which is arranged between the cylindrical scraping body and the arc-shaped frame body, and the torsion spring can drive the first radial scraping structure to be parallel to the side member of the second U-shaped member.

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