CN210022118U - Polymerization reaction kettle for preparing polyvinylidene fluoride - Google Patents
Polymerization reaction kettle for preparing polyvinylidene fluoride Download PDFInfo
- Publication number
- CN210022118U CN210022118U CN201920496851.8U CN201920496851U CN210022118U CN 210022118 U CN210022118 U CN 210022118U CN 201920496851 U CN201920496851 U CN 201920496851U CN 210022118 U CN210022118 U CN 210022118U
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- China
- Prior art keywords
- rotating shaft
- hollow rotating
- horizontal hollow
- gas
- cauldron
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- 238000006116 polymerization reaction Methods 0.000 title claims abstract description 30
- 239000002033 PVDF binder Substances 0.000 title claims abstract description 21
- 229920002981 polyvinylidene fluoride Polymers 0.000 title claims abstract description 21
- 239000012071 phase Substances 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 230000001360 synchronised effect Effects 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims description 22
- 239000007791 liquid phase Substances 0.000 claims description 18
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 claims description 16
- 239000000178 monomer Substances 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 12
- 239000012752 auxiliary agent Substances 0.000 claims description 9
- 238000002955 isolation Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 23
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000007792 gaseous phase Substances 0.000 abstract description 2
- 239000000376 reactant Substances 0.000 abstract description 2
- 230000000379 polymerizing effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 3
- 244000309464 bull Species 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 239000007957 coemulsifier Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 229920006126 semicrystalline polymer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Polymerisation Methods In General (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The utility model relates to a polymerization cauldron for preparing polyvinylidene fluoride, including the cauldron body and agitating unit, its technical essential is: the side and the top of every radial blade of agitating unit are equipped with the gas pocket respectively and every gas pocket communicates with the hollow chamber of horizontal hollow rotating shaft, the cauldron external portion is stretched out respectively at the both ends of horizontal hollow rotating shaft, cauldron body both sides are equipped with synchronous machine respectively, be equipped with drive mechanism between the tip of the horizontal hollow rotating shaft of two synchronous machines and corresponding side, the gaseous phase district is equipped with respectively, bleed mouth down, cauldron external portion be equipped with on, the draught fan that bleed mouth communicates respectively down, the both ends of horizontal hollow rotating shaft and the gas outlet of two draught fans are connected with the drainage pipeline respectively, the end of drainage pipeline insert the tip of horizontal hollow rotating shaft and with be equipped with sealed sliding sleeve between the horizontal hollow rotating shaft tip. The method obviously improves the reaction efficiency, saves the production cost, and fundamentally solves the problem of low rate of fully mixing and polymerizing gas-liquid two-phase reactants in the existing polymerization reaction kettle.
Description
Technical Field
The utility model relates to a gas-liquid two-phase polymerization reaction device, in particular to a polymerization reaction kettle for preparing polyvinylidene fluoride.
Background
Polyvinylidene fluoride (PVDF) is a fluorine-containing polymer material with excellent comprehensive performance, is a semi-crystalline polymer material in a normal state, has the crystallinity of about 50 percent, and has 5 crystal forms of α, β, gamma, delta, epsilon and the like which are reported so far, and can be formed under different conditions and can be mutually converted under certain conditions (the effects of heat, electric field, mechanical and radiation energy).
At present, the common process for preparing polyvinylidene fluoride is a suspension polymerization method, and the polyvinylidene fluoride is prepared by emulsion polymerization of vinylidene fluoride monomers in a water phase in the presence of assistants such as a fluoroether emulsifier, a co-emulsifier, an initiator, a chain transfer agent and the like, and then the processes of coagulation, washing, drying and crushing are carried out. The method has relatively low requirements on temperature and pressure, but has slow polymerization rate, so that the production cost is high, the reaction effect is influenced, and the performance index of the product is further influenced.
The existing polymerization reaction kettle adopts stirring and gas-liquid full polymerization mixing according to the characteristics of materials, but because a gas phase area and a liquid phase area are required to be reserved in a kettle body, and because the stirring efficiency of a stirring motor is limited, the gas at the top of the gas phase area and the liquid at the bottom of the liquid phase reaction area cannot be fully mixed to react, the reaction efficiency is relatively low, the effect of complete reaction can be achieved by long-time reaction, and the production cost of an enterprise is increased. Based on this, the structure of the existing polymerization reactor for preparing polyvinylidene fluoride still needs to be improved.
Disclosure of Invention
The utility model aims at providing an improve reaction efficiency, practice thrift manufacturing cost's a polymerization cauldron for preparing polyvinylidene fluoride, fundamentally solves the slow problem of the rate of gas, the double-phase reactant intensive mixing polymerization of liquid that current polymerization cauldron exists.
The technical scheme of the utility model is that:
the utility model provides a polymerization cauldron for preparing polyvinylidene fluoride, includes the cauldron body and agitating unit, and the internal lower part of cauldron is the liquid phase district, and upper portion is the gas phase district, is equipped with gas phase vinylidene fluoride monomer raw materials entry and liquid phase on the lateral wall of the cauldron body respectively and mixes the auxiliary agent entry in advance, and the bottom of the cauldron body is equipped with the polymerizate discharge opening, and its technical essential is: the bottom surface of the kettle body is a cambered surface, the stirring device is supported in a liquid phase area and consists of a horizontal hollow rotating shaft and a plurality of stirring blade groups which are uniformly arranged on the horizontal hollow rotating shaft along the axial direction, each stirring blade group consists of a plurality of radial blades which are uniformly distributed, the side surface and the top end of each radial blade are respectively provided with an air hole, each air hole is communicated with the hollow cavity of the horizontal hollow rotating shaft, the two ends of the horizontal hollow rotating shaft are respectively supported on the side wall of the kettle body by utilizing bearings, the two ends of the horizontal hollow rotating shaft respectively extend out of the kettle body, the two sides of the kettle body are respectively provided with a synchronous motor, a transmission mechanism is arranged between the two synchronous motors and the end part of the horizontal hollow rotating shaft at the corresponding side, the gas phase area is respectively provided with an upper gas introducing port and a lower gas introducing port, the outer part of the kettle body is provided with draught fans, and the tail ends of the drainage pipelines are inserted into the end part of the horizontal hollow rotating shaft and provided with a sealing sliding sleeve between the end part of the horizontal hollow rotating shaft, and the inner sides of the kettle bodies of the upper air-entraining port and the lower air-entraining port are respectively provided with an isolation cover with an air-permeable matrix.
The polymerization reaction kettle for preparing the polyvinylidene fluoride is characterized in that a pressure gauge and a gas-liquid separator communicated with a gas phase area are arranged at the top of the kettle body, a return pipeline leading to a gas-phase vinylidene fluoride monomer raw material storage tank is arranged at an outlet of the gas-liquid separator, and a safety valve is arranged on the return pipeline, so that when the pressure in the kettle body is too high, the safety valve is opened, and the gas-phase vinylidene fluoride monomer raw material flows back to the storage tank.
In the polymerization reaction kettle for preparing polyvinylidene fluoride, the shell of the gas-liquid separator is internally provided with the serpentine channel.
According to the polymerization reaction kettle for preparing polyvinylidene fluoride, the radial blades of two adjacent stirring blade groups are arranged on the horizontal hollow rotating shaft in a staggered manner, so that a better stirring effect is achieved.
The polymerization reactor for preparing polyvinylidene fluoride is characterized in that the transmission mechanism is a gear transmission mechanism, the gear transmission mechanism is composed of a pinion fixed on an output shaft of the synchronous motor and a large gear fixed at the end part of the horizontal hollow rotating shaft, and the pinion and the large gear are meshed with each other.
The utility model has the advantages that:
1. the method comprises the steps of introducing a gas-phase vinylidene fluoride monomer raw material positioned in a gas-phase region into a stirring device through a draught fan, dispersing the raw material to each corner of a liquid-phase region through radial blades of the stirring device, breaking liquid-phase agglomerates, and enabling the gas-phase vinylidene fluoride monomer raw material to fully react with a liquid-phase premixing auxiliary agent, so that the reaction speed is increased, the production efficiency is improved, and the production cost is saved.
2. Because the inner sides of the kettle bodies of the upper air-entraining port and the lower air-entraining port are provided with the isolation covers, liquid-phase substances are prevented from entering the draught fan and causing the damage of the draught fan.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a sectional view taken along line a-a in fig. 1.
In the figure: 1. the device comprises a draught fan, a kettle body, a draft fan, a separation cover, a pressure gauge, a gas-liquid separator, a gas-phase vinylidene fluoride monomer raw material inlet, a separation cover, a draft fan, a drainage pipeline, a synchronous motor, a horizontal hollow rotating shaft, a stirring blade group, a polymerization product discharge opening, a transmission mechanism, a drainage pipeline, a sealing sliding sleeve, a liquid-phase premixing auxiliary agent inlet, a reflux pipeline, a safety valve, a gas-phase area, a liquid-phase area, a gas hole and a gas hole, wherein the draft fan is 2, the kettle body is 3, the separation cover is 4, the pressure gauge is 5, the.
Detailed Description
As shown in figures 1 and 2, the polymerization reaction kettle for preparing polyvinylidene fluoride comprises a kettle body 2 and a stirring device. The lower part in the kettle body 2 is a liquid phase region 22, the upper part is a gas phase region 21, a gas phase vinylidene fluoride monomer raw material inlet 6 and a liquid phase premixing auxiliary agent inlet 18 are respectively arranged on the side wall of the kettle body 2, and the bottom surface of the kettle body 2 is a cambered surface and is provided with a polymerization product discharge opening 14.
The stirring device is supported in the liquid phase region 22, and is evenly located a plurality of stirring blade group 13 on the horizontal hollow rotating shaft 12 by horizontal hollow rotating shaft 12, along the axial and forms, and every stirring blade group 13 comprises a plurality of evenly distributed's radial blade, and every radial blade's side and top are equipped with gas pocket 23 respectively and every gas pocket 23 and the hollow chamber intercommunication of horizontal hollow rotating shaft 12, the both ends of horizontal hollow rotating shaft 12 utilize bearing 11 to support respectively on 2 lateral walls of the cauldron body and the both ends of horizontal hollow rotating shaft 12 stretch out the cauldron body 2 outsidely respectively, 2 both sides of the cauldron body are equipped with synchronous motor 10 respectively, are equipped with drive mechanism 15 between the tip of the horizontal hollow rotating shaft 12 of two synchronous motor 10 and corresponding side. The transmission mechanism 15 is a gear transmission mechanism, the gear transmission mechanism is composed of a pinion fixed on the output shaft of the synchronous motor 10 and a bull gear fixed on the end of the horizontal hollow rotating shaft 12, and the pinion and the bull gear are meshed with each other. The radial blades of two adjacent stirring blade groups 13 are arranged on the horizontal hollow rotating shaft 12 in a staggered manner, so that a better stirring effect is achieved.
Gaseous phase district 21 is equipped with upper and lower bleed port respectively, the cauldron body 2 outside is equipped with draught fan 1, 8 with upper and lower bleed port intercommunication respectively, the both ends of horizontal hollow rotating shaft 12 and the gas outlet one-to-one of draught fan 1, 8 to be connected with drainage pipeline 16, 9 respectively, drainage pipeline 16, 9 the end insert horizontal hollow rotating shaft 12 the tip and with horizontal hollow rotating shaft 12 between the tip be equipped with sealed sliding sleeve 17, the cauldron body 2 inboard of upper and lower bleed port sets up the cage 3, 7 that have the matrix of ventilating respectively. The top of the kettle body 2 is provided with a pressure gauge 4 and a gas-liquid separator 5 communicated with a gas phase area 21, an outlet of the gas-liquid separator 5 is provided with a return pipeline 19 leading to a gas phase vinylidene fluoride monomer raw material storage tank, the return pipeline 19 is provided with a safety valve 20, so that when the pressure in the kettle body 2 is too high, the safety valve 20 is opened, and the gas phase vinylidene fluoride monomer raw material flows back to the storage tank. A snake-shaped channel is arranged in the shell of the gas-liquid separator 5.
When the device works, according to the proportion, a gas-phase vinylidene fluoride monomer raw material is fed through a gas-phase vinylidene fluoride monomer raw material inlet 6, a premixed polymerization auxiliary agent is fed through a liquid-phase premixed auxiliary agent inlet 18, two synchronous motors 10 are started firstly, so that a stirring device is started, then draught fans 1 and 8 are started, the gas-phase vinylidene fluoride monomer raw material is introduced below the liquid level of the polymerization auxiliary agent, the gas-phase vinylidene fluoride monomer raw material and the polymerization auxiliary agent are fully mixed, and the polymerization reaction is fully.
Claims (5)
1. The utility model provides a polymerization cauldron for preparing polyvinylidene fluoride, includes the cauldron body and agitating unit, and the internal lower part of cauldron is the liquid phase district, and upper portion is the gas phase district, is equipped with gas phase vinylidene fluoride monomer raw materials entry and liquid phase on the lateral wall of the cauldron body respectively and mixes the auxiliary agent entry in advance, and the bottom of the cauldron body is equipped with polymerizate discharge opening, its characterized in that: the bottom surface of the kettle body is a cambered surface, the stirring device is supported in a liquid phase area and consists of a horizontal hollow rotating shaft and a plurality of stirring blade groups which are uniformly arranged on the horizontal hollow rotating shaft along the axial direction, each stirring blade group consists of a plurality of radial blades which are uniformly distributed, the side surface and the top end of each radial blade are respectively provided with an air hole, each air hole is communicated with the hollow cavity of the horizontal hollow rotating shaft, the two ends of the horizontal hollow rotating shaft are respectively supported on the side wall of the kettle body by utilizing bearings, the two ends of the horizontal hollow rotating shaft respectively extend out of the kettle body, the two sides of the kettle body are respectively provided with a synchronous motor, a transmission mechanism is arranged between the two synchronous motors and the end part of the horizontal hollow rotating shaft at the corresponding side, the gas phase area is respectively provided with an upper gas introducing port and a lower gas introducing port, the outer part of the kettle body is provided with draught fans, and the tail ends of the drainage pipelines are inserted into the end part of the horizontal hollow rotating shaft and provided with a sealing sliding sleeve between the end part of the horizontal hollow rotating shaft, and the inner sides of the kettle bodies of the upper air-entraining port and the lower air-entraining port are respectively provided with an isolation cover with an air-permeable matrix.
2. The polymerization reactor for preparing polyvinylidene fluoride according to claim 1, wherein: the top of the kettle body is provided with a pressure gauge and a gas-liquid separator communicated with the gas phase area, the outlet of the gas-liquid separator is provided with a return pipeline leading to a gas phase vinylidene fluoride monomer raw material storage tank, and the return pipeline is provided with a safety valve.
3. The polymerization reactor for preparing polyvinylidene fluoride according to claim 2, wherein: a snake-shaped channel is arranged in the shell of the gas-liquid separator.
4. The polymerization reactor for preparing polyvinylidene fluoride according to claim 1, wherein: the radial blades of two adjacent stirring blade groups are arranged on the horizontal hollow rotating shaft in a staggered manner.
5. The polymerization reactor for preparing polyvinylidene fluoride according to claim 1, wherein: the transmission mechanism is a gear transmission mechanism, the gear transmission mechanism is composed of a small gear fixed on an output shaft of the synchronous motor and a large gear fixed at the end part of the horizontal hollow rotating shaft, and the small gear and the large gear are meshed with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920496851.8U CN210022118U (en) | 2019-04-13 | 2019-04-13 | Polymerization reaction kettle for preparing polyvinylidene fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920496851.8U CN210022118U (en) | 2019-04-13 | 2019-04-13 | Polymerization reaction kettle for preparing polyvinylidene fluoride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210022118U true CN210022118U (en) | 2020-02-07 |
Family
ID=69359106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920496851.8U Expired - Fee Related CN210022118U (en) | 2019-04-13 | 2019-04-13 | Polymerization reaction kettle for preparing polyvinylidene fluoride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210022118U (en) |
-
2019
- 2019-04-13 CN CN201920496851.8U patent/CN210022118U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200207 |
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| CF01 | Termination of patent right due to non-payment of annual fee |