PVDF (Polyvinylidene Fluoride) polymerization reaction device

Abstract

The utility model relates to the technical field of polymerization reaction, in particular to a PVDF (Polyvinylidene Fluoride) polymerization reaction device, and aims to solve the problems that in the existing polymerization reaction process, chemical additives cannot be effectively mixed and stirred, and during the reaction, full polymerization reaction cannot be effectively carried out, so that unreacted materials are excessive, and the production effect is influenced. According to the scheme, the device comprises a polymerization kettle, the upper cover plate is arranged at the top end of the polymerization kettle, the polymerization kettle is provided with a sealing protection plate, the sealing protection plate is matched with the upper cover plate, the bottom end of the polymerization kettle is fixedly provided with a lower bottom plate, the upper cover plate is fixedly provided with a material storage box, the polymerization kettle is fixedly provided with a discharging pipe, and the discharging pipe is fixedly provided with a single device. Raw materials and additives in the reaction are fully mixed through a plurality of pulp plates in the polymerization kettle and a plurality of stirring rods in the material storage box, so that the reaction effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of polymerization reaction, in particular to a PVDF polymerization reaction device. Background Art

[0002] Fluorine chemical industry is a dominant industry in my country with unique resources, and significant breakthroughs are being made in some cutting-edge oxidative chemical products. These oxidative chemical products are not only used in emerging industries such as high-end equipment manufacturing, new energy, and electronic information, but also play a vital role in transforming and upgrading traditional industries. Poly (vinylidene fluoride), abbreviated as PVDF, primarily refers to ethylene homopolymers with the molecular formula PVDF or copolymers of vinylidene fluoride with other small amounts of fluorinated vinyl monomers. It combines the characteristics of both fluororesins and general-purpose resins, offering excellent resistance to chemical corrosion, high temperatures, oxidation, weathering, and radiation, as well as special properties such as piezoelectricity, dielectricity, and thermoelectricity.

[0003] In the prior art, chemical additives cannot be effectively mixed and stirred during the polymerization reaction, and when the reaction occurs, the polymerization reaction cannot be effectively and fully carried out, resulting in excessive unreacted materials and affecting the production effect.

[0004] Therefore, we proposed a PVDF polymerization reaction device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art that chemical additives cannot be effectively mixed and stirred during the polymerization reaction, and when the reaction occurs, the polymerization reaction cannot be effectively and fully carried out, resulting in excessive unreacted materials and affecting the production effect. A PVDF polymerization reaction device is proposed.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A PVDF polymerization reaction device, comprising:

[0008] Polymerization reactor;

[0009] An upper cover plate is provided on the top of the polymerization kettle. A sealing guard plate is provided on the polymerization kettle. The sealing guard plate cooperates with the upper cover plate. A lower bottom plate is fixedly installed on the bottom end of the polymerization kettle. A material storage box is fixedly installed on the upper cover plate. A discharge pipe is fixedly installed on the polymerization kettle. A monomer device is fixedly installed on the discharge pipe. A kettle jacket circulating water is fixedly installed on the inner wall of the polymerization kettle.

[0010] A stirring mechanism 1 is provided in the polymerization kettle and is used to stir the raw materials in the polymerization kettle;

[0011] The second stirring mechanism is arranged in the storage box and is used to stir the additives in the storage box.

[0012] Preferably, an evacuation pipe and a nitrogen pipe are fixedly installed on the upper cover plate for performing nitrogen replacement operations on the polymerization kettle.

[0013] Preferably, a plurality of supporting legs are fixedly mounted on the lower base plate, and a base is fixedly mounted on each of the plurality of supporting legs.

[0014] Preferably, a chassis is fixedly mounted on the lower base plate, a motor is fixedly mounted in the chassis, a rotating shaft 1 is fixedly mounted on the output shaft of the motor, and the lower three-rod ring is fixedly mounted on the rotating shaft 1.

[0015] Preferably, the stirring mechanism includes multiple arc-shaped mounting plates, which are fixedly mounted on the lower three-rod rings, multiple paddles are fixedly mounted on the multiple arc-shaped mounting plates, and the upper three-rod rings are fixedly mounted on the tops of the multiple arc-shaped mounting plates.

[0016] Preferably, a telescopic shaft is fixedly mounted on the upper three-rod ring, and a fixed shaft is fixedly mounted on the telescopic shaft.

[0017] Preferably, the second stirring mechanism includes a second rotating shaft, which is rotatably installed in the storage box. The second rotating shaft is provided with an axis groove, which coincides with the fixed shaft. A transmission shaft is fixedly installed on the second rotating shaft, and a plurality of stirring rods and a plurality of arc-shaped stirring rods are fixedly installed on the transmission shaft.

[0018] Preferably, a water leakage trough is provided in the storage box, a diverter is fixedly installed on the water leakage trough, and a plurality of nozzles are fixedly installed on the diverter.

[0019] In the present invention, the beneficial effects of the PVDF polymerization reaction device are:

[0020] (1) The raw materials and additives of the reaction can be stirred by multiple paddles and multiple stirring rods.

[0021] (2) Since multiple pulp plates in the polymerization kettle are used for stirring, the raw materials are in flow, and the additives flow into the polymerization kettle through multiple nozzles, which can effectively achieve full mixing.

[0022] The utility model fully mixes the raw materials and additives in the reaction through the multiple pulp plates in the polymerization kettle and the multiple stirring rods in the material storage box, so as to achieve better reaction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a PVDF polymerization reaction device proposed in the present invention;

[0024] Figure 2This is a schematic diagram of the exploded structure of a polymerization kettle of a PVDF polymerization reaction device proposed in the present invention;

[0025] Figure 3 This is a schematic cross-sectional structural diagram of a storage box of a PVDF polymerization reaction device proposed in the utility model.

[0026] In the figure: 1. Polymerization kettle; 2. Sealing guard plate; 3. Upper cover plate; 4. Storage box; 5. Evacuation pipe; 6. Nitrogen pipe; 7. Lower bottom plate; 8. Support legs; 9. Base; 10. Chassis; 11. Discharge pipe; 12. Monomer device; 13. Kettle jacket circulating water; 14. Rotating shaft 1; 15. Lower three-rod ring; 16. Arc-shaped mounting plate; 17. Pulp plate; 18. Upper three-rod ring; 19. Telescopic shaft; 20. Fixed shaft; 21. Rotating shaft 2; 22. Shaft groove; 23. Drive shaft; 24. Stirring rod; 25. Arc-shaped stirring rod; 26. Leakage trough; 27. Diverter; 28. Nozzle. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Example 1

[0029] Reference Figure 1-Figure 3 , a PVDF polymerization reaction device, comprising:

[0030] Polymerization reactor 1;

[0031] An upper cover plate 3 is provided at the top of the polymerization kettle 1. A sealing guard plate 2 is provided on the polymerization kettle 1. The sealing guard plate 2 cooperates with the upper cover plate 3. A lower bottom plate 7 is fixedly installed at the bottom end of the polymerization kettle 1. A material storage box 4 is fixedly installed on the upper cover plate 3. A discharge pipe 11 is fixedly installed on the polymerization kettle 1. A monomer device 12 is fixedly installed on the discharge pipe 11. A kettle jacket circulating water 13 is fixedly installed on the inner wall of the polymerization kettle 1.

[0032] A stirring mechanism 1 is provided in the polymerization kettle 1 and is used to stir the raw materials in the polymerization kettle 1;

[0033] The second stirring mechanism is provided in the storage box 4 and is used for stirring the additive in the storage box 4 .

[0034] In the present invention, an evacuation pipe 5 and a nitrogen pipe 6 are fixedly mounted on the upper cover plate 3 , and are used to perform nitrogen replacement operation on the polymerization kettle 1 .

[0035] In the present invention, a plurality of supporting legs 8 are fixedly mounted on the lower base plate 7 , and a base 9 is fixedly mounted on each of the plurality of supporting legs 8 .

[0036] In the present invention, a chassis 10 is fixedly mounted on the lower base plate 7, a motor is fixedly mounted in the chassis 10, a rotating shaft 14 is fixedly mounted on the output shaft of the motor, and a lower three-rod ring 15 is fixedly mounted on the rotating shaft 14.

[0037] In the present invention, the stirring mechanism includes multiple arc-shaped mounting plates 16, which are fixedly mounted on the lower three-rod ring 15. Multiple paddle plates 17 are fixedly mounted on the multiple arc-shaped mounting plates 16 respectively, and the tops of the multiple arc-shaped mounting plates 16 are fixedly mounted with the upper three-rod ring 18.

[0038] In the present invention, a telescopic shaft 19 is fixedly mounted on the upper three-rod ring 18 , and a fixed shaft 20 is fixedly mounted on the telescopic shaft 19 .

[0039] In the present invention, the second stirring mechanism includes a second rotating shaft 21, which is rotatably installed in the storage box 4. The second rotating shaft 21 is provided with an axis groove 22, which coincides with the fixed shaft 20. A transmission shaft 23 is fixedly installed on the second rotating shaft 21, and a plurality of stirring rods 24 and a plurality of arc-shaped stirring rods 25 are fixedly installed on the transmission shaft 23.

[0040] In the present invention, a water leakage trough 26 is provided in the material storage box 4 , a diverter 27 is fixedly mounted on the water leakage trough 26 , and a plurality of nozzles 28 are fixedly mounted on the diverter 27 .

[0041] In the present invention, the polymerization kettle 1 is replaced with nitrogen through the evacuation pipe 5 and the nitrogen pipe 6, and the oxygen content is sampled and analyzed to meet the requirements, and the VDF gas is compressed or transported to the polymerization kettle 1 through other equipment. At the same time, the raw materials are synchronously poured into the polymerization kettle 1. The raw materials include VDF, additives, initiators, and deoxygenated water. The upper cover plate 3 is tightly connected to the sealing guard plate 2, and the polymerization kettle 1 begins to heat up and operate. The motor in the chassis 10 is started, and the lower three-rod ring 15 and the multiple pulp plates 17 on the multiple arc-shaped mounting plates 16 are driven to operate by the driving shaft 14, and the upper three-rod ring 18 is driven to operate synchronously, and the telescopic shaft 19 and the fixed shaft 20 drive the multiple stirring rods 24 and the multiple arc-shaped stirring rods 25 on the transmission shaft 23 to operate, so as to mix the additives in the storage box 4. The telescopic shaft 19 can effectively reduce the impact force caused during assembly and reduce the damage to the equipment. The equipment is damaged, and the stirred additives flow into the polymerization kettle 1 through the leakage trough 26 and multiple nozzles 28. Since the raw materials in the polymerization kettle 1 are continuously flowing with the assistance of multiple pulp plates 17, when the additives flow in, they can effectively react with the raw materials in the polymerization kettle 1. At the same time, the pressure and temperature meter on the polymerization kettle 1 can effectively monitor the temperature and pressure in the polymerization kettle 1. The polymerization reaction temperature is controlled by the circulating water 13 of the kettle jacket, and the pressure of the polymerization reaction is controlled by pumping the initiator into the polymerization kettle 1 through a metering pump. After the polymerization reaction is completed, the polymerization reaction is cooled, and the unreacted VDF monomer is sent to the monomer device 12 (the monomer device 12 is a storage device for fluorine chemical production disclosed in Publication No. 202121563502.7) for recovery and treatment. After the polymerization kettle 1 is cooled to room temperature, the PVDF dispersion is discharged into the middle tank.

[0042] Example 2

[0043] The difference between this embodiment and the first embodiment is that a VDF monomer feeding pipe is provided at the upper cover plate 3 to facilitate the feeding of the VDF monomer.

[0044] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A PVDF polymerization reaction device, characterized in that: include: Polymerization reactor (1); An upper cover plate (3) is provided at the top of the polymerization kettle (1); a sealing guard plate (2) is provided on the polymerization kettle (1); the sealing guard plate (2) and the upper cover plate (3) cooperate with each other; a lower base plate (7) is fixedly installed at the bottom end of the polymerization kettle (1); a material storage box (4) is fixedly installed on the upper cover plate (3); a discharge pipe (11) is fixedly installed on the polymerization kettle (1); a monomer device (12) is fixedly installed on the discharge pipe (11); and a kettle jacket circulating water (13) is fixedly installed on the inner wall of the polymerization kettle (1); A stirring mechanism 1 is provided in the polymerization kettle (1) and is used to stir the raw materials in the polymerization kettle (1); The second stirring mechanism is arranged in the storage box (4) and is used for stirring the additive in the storage box (4).

2. A PVDF polymerization reaction device according to claim 1, characterized in that, An evacuation pipe (5) and a nitrogen pipe (6) are fixedly mounted on the upper cover plate (3) and are used for nitrogen replacement of the polymerization kettle (1).

3. A PVDF polymerization reaction device according to claim 1, characterized in that, A plurality of supporting legs (8) are fixedly mounted on the lower base plate (7), and a base (9) is fixedly mounted on each of the plurality of supporting legs (8).

4. A PVDF polymerization reaction device according to claim 1, characterized in that, A chassis (10) is fixedly mounted on the lower base plate (7), a motor is fixedly mounted in the chassis (10), a rotating shaft (14) is fixedly mounted on the output shaft of the motor, and a lower three-rod ring (15) is fixedly mounted on the rotating shaft (14).

5. A PVDF polymerization reaction device according to claim 1, characterized in that, The stirring mechanism 1 comprises a plurality of arc-shaped mounting plates (16), the plurality of arc-shaped mounting plates (16) being fixedly mounted on the lower three-rod circular ring (15), a plurality of paddle plates (17) being fixedly mounted on the plurality of arc-shaped mounting plates (16), and an upper three-rod circular ring (18) being fixedly mounted on the top ends of the plurality of arc-shaped mounting plates (16).

6. A PVDF polymerization reaction device according to claim 5, characterized in that: A telescopic shaft (19) is fixedly mounted on the upper three-rod circular ring (18), and a fixed shaft (20) is fixedly mounted on the telescopic shaft (19).

7. A PVDF polymerization reaction device according to claim 1, characterized in that: The stirring mechanism comprises a second rotating shaft (21), which is rotatably mounted in the material storage box (4). The second rotating shaft (21) is provided with an axis groove (22), which coincides with the fixed shaft (20). A transmission shaft (23) is fixedly mounted on the second rotating shaft (21), and a plurality of stirring rods (24) and a plurality of arc-shaped stirring rods (25) are fixedly mounted on the transmission shaft (23).

8. A PVDF polymerization reaction device according to claim 1, characterized in that: A water leakage trough (26) is provided in the material storage box (4), a diverter (27) is fixedly mounted on the water leakage trough (26), and a plurality of nozzles (28) are fixedly mounted on the diverter (27).

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