CN107188995A - A kind of device and its application for being used to adjust polytetrafluoroethylene (PTFE) reaction temperature - Google Patents
A kind of device and its application for being used to adjust polytetrafluoroethylene (PTFE) reaction temperature Download PDFInfo
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- CN107188995A CN107188995A CN201610145047.6A CN201610145047A CN107188995A CN 107188995 A CN107188995 A CN 107188995A CN 201610145047 A CN201610145047 A CN 201610145047A CN 107188995 A CN107188995 A CN 107188995A
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- heat exchanger
- ptfe
- polytetrafluoroethylene
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- cooling
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/01—Processes of polymerisation characterised by special features of the polymerisation apparatus used
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F114/00—Homopolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F114/18—Monomers containing fluorine
- C08F114/26—Tetrafluoroethene
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The present invention provides a kind of device for being used to adjust polytetrafluoroethylene (PTFE) reaction temperature, including make-up water water inlet pipe, air supply tank, air pressure tank, heating heat exchanger, cooling heat exchanger, ptfe autoclave outer wall chuck, make-up water water inlet pipe is connected to air supply tank, the outlet pipeline of air supply tank is connected to air pressure tank, the outlet pipeline of air pressure tank is connected to preheater, the outlet pipeline of preheater connects heating pipeline and cooling line respectively, heat pipeline connection heating heat exchanger, heating heat exchanger outlet pipeline connection chuck；The heat transferring medium outlet of chuck is connected on the outlet pipeline of preheater by pipeline.The present invention uses deionized water for the temperature control medium in polytetrafluoroethylene (PTFE) course of reaction, and deionized water non flouling behaviour in cyclic process improves the precision of temperature control and the quality of polyflon；Whole temperature-adjusting device is closed circulation, does not use industrial water-air cooling to cool down, and impurity is not had and enters circulation line, temperature control medium loss is few, with cost-effective advantage.
Description
Technical field
The invention belongs to organic high molecular compound preparation field, and in particular to a kind of emulsion polymerization
The apparatus and method of reaction temperature control.
Background technology
Polyflon has excellent combination property because of it, in the application of current industrial field
Extensively.The main production method of polytetrafluoroethylene (PTFE) is emulsion polymerization, and polymerized monomer is in certain temperature
Under pressure, emulsion polymerization is carried out under initiator, chain-transferring agent, emulsifying agent existence condition.
For the polytetrafluoroethyl-ne ene product of different performance, different polymerization temperatures can be used.
In the course of reaction of polytetrafluoroethylene (PTFE), the stability of reaction temperature and regulation sensitivity are shadows
Ring a highly important factor of end product quality height.In current polytetrafluoroethylene (PTFE) industry
In, the heat exchange of ptfe autoclave is using industry water as tempered water, and industry water is impure
Many, easy scale effect heat transfer effect reduces the regulation sensitivity of reaction temperature；Using work
Industry water is as tempered water, due to directly being contacted with the external world in cooling procedure, in temperature adjustment water circulation
During be lost big, add production cost.
The content of the invention
In view of the deficienciess of the prior art, regulation of the present invention to polytetrafluoroethylene (PTFE) reaction temperature
Technique has carried out design, and there is provided a kind of device for being used to adjust polytetrafluoroethylene (PTFE) reaction temperature.
It is another object of the present invention to application described device, there is provided one kind regulation polytetrafluoroethylene (PTFE) is anti-
The method for answering temperature.
The technical scheme for realizing above-mentioned purpose of the present invention is：
A kind of device for being used to adjust polytetrafluoroethylene (PTFE) reaction temperature, including deionized water are added and are
System and circulating temperature-regulating system,
The deionized water, which adds system, includes feedwater water inlet pipe, air supply tank, air pressure tank；It is described
Circulating temperature-regulating system includes circulation line, heating heat exchanger, cooling heat exchanger, is placed in polytetrafluoro
The chuck of ethylene reaction kettle outer wall, the chuck is provided with heat transferring medium import and heat transferring medium goes out
Mouthful；
The make-up water water inlet pipe is connected to the air supply tank, air supply tank outlet pipeline and is connected to gas
Tank is pressed, the outlet pipeline of air pressure tank is connected with preheater, and the outlet pipeline of preheater, which is connected to, to follow
Ring thermoregulating system；The outlet pipeline of preheater is connected to through circulation line and three-way control valve
Pipeline and cooling line are heated, the heating pipeline connects the heating heat exchanger, heating heat exchange
The outlet pipeline of device connects the heat transferring medium import of chuck；The cooling line connects the cooling
Heat exchanger, the outlet pipeline of cooling heat exchanger connects the heat transferring medium import of chuck.
Wherein, make-up water water inlet pipe can connect deionized water storage tank, usual spent ion exchange resin
Produce deionized water.The heat transferring medium import that chuck is set can be 1~4, and usual volume is big
The chuck of reactor can set multiple imports；The heat transferring medium outlet that chuck is set can be
1~4, the chuck of bulky reactor can set multiple outlets.
Further, the outlet pipeline of the outlet pipeline of the heating heat exchanger and cooling heat exchanger
Linked together by threeway or static mixer, threeway or the 3rd outlet of static mixer
Connect the heat transferring medium import of chuck.
Hot water and cold water, which are first mixed, enters back into chuck.Connecting water pipe can be threeway or static mixed
Clutch, preferably uses static mixer when water is big, water preferably uses threeway when few.
Wherein, it is provided with water circulating pump on the circulation line.
Wherein, temperature sensor, the heating heat exchanger are provided with ptfe autoclave
Heating medium pipeline, be provided with valve on the cooling medium pipeline of cooling heat exchanger, it is described
Temperature sensor, valve, three-way control valve are all connected to automatic control system.
A kind of method for adjusting polytetrafluoroethylene (PTFE) reaction temperature, using device of the present invention,
Heat transferring medium in using deionized water as ptfe autoclave chuck, deionized water is from supply
Water water inlet pipe is fed, and enters reactor after being exchanged heat in heating heat exchanger and/or cooling heat exchanger
Chuck, adjusts the temperature of polytetrafluoroethyl-ne alkene reaction；Heating is again introduced into after deionized water heat exchange to change
Hot device and/or cooling heat exchanger, cycle heat exchange.
Preferably, the pressure of air pressure tank is controlled to be 0.2Mpa~0.25Mpa with the air supply tank,
With the liquid level of deionized water in the automatic exhaust steam valve Air Valve Control tank at the top of air pressure tank 1/2~2/3.
For example, air pressure tank is highly 2000mm, then it is 1000mm~1300mm to control liquid level.
Wherein, temperature is 50 ± 3 DEG C after the deionized water result preheater preheating.Preheater
The heating medium used is low-pressure steam (0.4~1.0Mpa of pressure steam).
Preferably, the deionized water internal circulating load is anti-for 25~35 times per hour of polytetrafluoroethylene (PTFE)
Kettle is answered to accumulate.For example, reactor volume is 4m3, deionized water internal circulating load is 100~140m3/h。
Wherein, the lift of the water circulating pump is 50m；The scope of polytetrafluoroethylene (PTFE) reaction temperature
For 73.5~120 DEG C.
Wherein, the heating heat exchanger is plate type heat exchanger, using low-pressure steam as heating medium,
The cooling heat exchanger is plate type heat exchanger, using 4~8 DEG C of water as cooling medium.
The beneficial effects of the present invention are：
The present invention use deionized water for the temperature control medium in polytetrafluoroethylene (PTFE) production process, go from
Sub- water non flouling behaviour in cyclic process, improves the precision of temperature control；Whole temperature-adjusting device
For closed circulation, do not use industrial water-air cooling to cool down, impurity is not had and enters circulation line, adjust
Warm dielectric loss is few, with cost-effective advantage.
Brief description of the drawings
Fig. 1 is used for the structure drawing of device for adjusting polytetrafluoroethylene (PTFE) reaction temperature for the present invention.
In figure, 1, reactor, 2, plate type heating heat exchanger, 3, board-like cooling heat exchanger, 4,
Water circulating pump, 5, air supply tank, 6, air pressure tank, 7, preheater, the 8, first temperature sensor,
9th, second temperature sensor, 10, three-temperature sensor, 11, automatic control system, 12,
Heat medium valve, 13, cooling medium valve, 14, three-way control valve, 15, regulating valve,
16th, check-valves, 17, pressure transmitter, 18, automatic exhaust steam valve, 19, air hose, 20,
Pre- heat medium pipeline, 21, make-up water water inlet pipe, 22, circulation line, 23, preheater
Outlet pipeline
Embodiment
Following examples further illustrate present disclosure, but should not be construed as to the present invention's
Limitation.Without departing from the spirit and substance of the case in the present invention, to the inventive method, step or
The modifications or substitutions that condition is made, belong to the scope of the present invention.
Unless otherwise specified, technological means used in embodiment is ripe for those skilled in the art
The conventional meanses known.
Embodiment 1
Such as Fig. 1, a kind of device for being used to adjust polytetrafluoroethylene (PTFE) reaction temperature, including by a left side extremely
The connected deionized water in the right side adds system and circulating temperature-regulating system, also respectively with voltage-stabilizing system and temperature
Control system is connected；
Specifically, the present apparatus includes make-up water water inlet pipe 21, air pressure tank 6, plate type heating heat exchange
Device 2, board-like cooling heat exchanger 3, reactor 1 outer wall for being placed in polytetrafluoroethylene (PTFE) polymerisation
Chuck, the chuck is provided with heat transferring medium import and heat transferring medium outlet；Make-up water water inlet pipe 21
Upper setting regulating valve 15.
The make-up water water inlet pipe is connected to the outlet pipeline connection of the air supply tank 5, air supply tank
In air pressure tank 6, the outlet pipeline of air pressure tank is connected to preheater 7, the outlet pipeline 23 of preheater
Connect the circulation line 22 of circulating temperature-regulating system；Circulation line 22 is adjusted through water circulating pump 4, threeway
Section valve 14 connects heating pipeline and cooling line respectively, wherein the connecting plate type heating of heating pipeline is changed
Hot device 2, the outlet pipeline of heating heat exchanger connects the import of chuck；Cooling line connecting plate type
Cooling heat exchanger 3, the outlet pipeline of cooling heat exchanger and the outlet pipeline of heating heat exchanger pass through
Threeway is connected, and the heat transferring medium import of chuck is entered after merging；The heat transferring medium outlet of chuck is logical
Pipeline is crossed to be connected on circulation line 22.The is set on the pipeline of heat transferring medium import connection
Three-temperature sensor 10.
The air pressure tank 6, which is connected with the top of air supply tank 5, air supply tank, sets air hose 19, air
Check-valves 16 is provided with pipe 19.The top of air pressure tank 6 sets pressure transmitter 17 and automatic
Air bleeding valve 18, constitutes voltage-stabilizing system.Pressure transmitter 17 connects the tune of control and recharge water-carrying capacity
Valve 15 is saved when the liquid level of air pressure tank 6 drops to lower bound, is excluded automatically by automatic exhaust steam valve 18
The gas being more than makes within the scope of its liquid level is maintained at normal.In the present embodiment, air pressure tank is high
2000mm is spent, the control of intraluminal fluid position is 1000mm~1300mm.
Water circulating pump 4 is provided with circulation line.The lift of the water circulating pump is 50m.
Wherein, two temperature sensors are provided with ptfe autoclave, are first respectively
Set on temperature sensor 8 and second temperature sensor 9, the heating medium pipeline of heating heat exchanger
Cooling medium valve is provided with heating medium valve 12, the cooling medium pipeline of cooling heat exchanger
13, the first temperature sensor 8 and second temperature sensor 9, three-temperature sensor 10, heating
Medium valve 12, cooling medium valve 13, three-way control valve 14 are connected to automatic control system 11.
Embodiment 2
A kind of method for adjusting polytetrafluoroethylene (PTFE) reaction temperature, the device of embodiment 1 is applied to
The production of the fluorine emulsion projects of 2500t/a tetra-.In using deionized water as ptfe autoclave chuck
Heat transferring medium, deionized water spent ion exchange resin is prepared, and is mended from make-up water water inlet pipe
Give, reacting kettle jacketing, regulation are entered after being exchanged heat in heating heat exchanger and/or cooling heat exchanger
The temperature of polytetrafluoroethyl-ne alkene reaction；Deionized water heat exchange after be again introduced into heating heat exchanger and/or
Cooling heat exchanger, cycle heat exchange.
Control the pressure of air pressure tank to be 0.2Mpa~0.25Mpa with the air supply tank, use air pressure tank
The liquid level of deionized water is in 1000mm~1300mm in the automatic exhaust steam valve Air Valve Control tank at top
Highly locate.Air pressure tank is highly 2000mm.
In the present embodiment, the tank volume of ptfe autoclave is 4m3, deionized water circulation
Measure 120m3/h.Low-pressure steam is passed through in pre- heat medium pipeline 20 for pre- thermal medium, deionized water
Temperature is 50 ± 3 DEG C after preheater is preheated.
In the present embodiment, plate type heating heat exchanger is using low-pressure steam as heating medium, board-like cooling
Heat exchanger is using 5 DEG C of water as cooling medium.The scope for controlling polytetrafluoroethylene (PTFE) reaction temperature is
73.5~120 DEG C.Temperature fluctuation range is within 1 DEG C in production process.
Temperature control medium is not lost during normal operation；It is situated between using internal cause leakage in 1 year or maintenance temperature adjustment
The waste of matter is 0.1%
Comparative example
The old tempering process of tetrafluoro resin production project is：The folder of polytetrafluoroethylene (PTFE) polymerization reaction kettle
Heat transferring medium in set is industry water.It is divided into from the industry water of the heat transferring medium outlet discharge of chuck
Two-way, is cooling water and non-cooled water respectively, and (cooling water) passes through pipeline and reach cooling all the way
Tower, cools by cooling medium air cooling of air, after directly being mixed with non-cooled water after cooling
Exchanged heat into reactor jacket.
For the tempering process that polytetrafluoroethyl-ne alkene reaction is old, the scope of temperature adjustment is 73.5~120 DEG C.
Temperature fluctuation range is within 3 DEG C in production process.
The waste of temperature control medium is 1~2% in 1 year.
Although above having made in detail to the present invention with a general description of the specific embodiments
Most description, but on the basis of the present invention, it can be made some modifications or improvements, this is to this
It is obvious for art personnel.Therefore, on the basis without departing from spirit of the present invention
Upper these modifications or improvements, belong to the scope of protection of present invention.
Claims (10)
1. a kind of device for being used to adjust polytetrafluoroethylene (PTFE) reaction temperature, including deionized water are mended
Adding system and circulating temperature-regulating system, it is characterised in that
The deionized water, which adds system, includes feedwater water inlet pipe, air supply tank, air pressure tank；It is described
Circulating temperature-regulating system includes circulation line, heating heat exchanger, cooling heat exchanger, is placed in polytetrafluoro
The chuck of ethylene reaction kettle outer wall, the chuck is provided with heat transferring medium import and heat transferring medium goes out
Mouthful；
The make-up water water inlet pipe is connected to the air supply tank, air supply tank outlet pipeline and is connected to gas
Tank is pressed, the outlet pipeline of air pressure tank is connected with preheater, and the outlet pipeline of preheater, which is connected to, to follow
Ring thermoregulating system；The outlet pipeline of preheater is connected to through circulation line and three-way control valve
Pipeline and cooling line are heated, the heating pipeline connects the heating heat exchanger, heating heat exchange
The outlet pipeline of device connects the heat transferring medium import of chuck；The cooling line connects the cooling
Heat exchanger, the outlet pipeline of cooling heat exchanger connects the heat transferring medium import of chuck.
2. it is used for the device for adjusting polytetrafluoroethylene (PTFE) reaction temperature according to claim 1, its
It is characterised by, the outlet pipeline of the heating heat exchanger and the outlet pipeline of cooling heat exchanger pass through
Threeway or static mixer link together, threeway or the 3rd outlet connection of static mixer
The heat transferring medium import of chuck.
3. it is used for the device for adjusting polytetrafluoroethylene (PTFE) reaction temperature according to claim 1, its
It is characterised by, water circulating pump is provided with the circulation line.
4. it is used for the dress for adjusting polytetrafluoroethylene (PTFE) reaction temperature according to claims 1 to 3 is any
Put, it is characterised in that temperature sensor, the heating are provided with ptfe autoclave
Valve is provided with the heating medium pipeline of heat exchanger, the cooling medium pipeline of cooling heat exchanger
Door, the temperature sensor, valve, three-way control valve are all connected to automatic control system.
5. a kind of method for adjusting polytetrafluoroethylene (PTFE) reaction temperature, any using Claims 1 to 4
Described device, it is characterised in that in using deionized water as ptfe autoclave chuck
Heat transferring medium, deionized water is fed from make-up water water inlet pipe, in heating heat exchanger and/or cooling
Enter reacting kettle jacketing after being exchanged heat in heat exchanger, adjust the temperature of polytetrafluoroethyl-ne alkene reaction；Go from
Heating heat exchanger and/or cooling heat exchanger, cycle heat exchange are again introduced into after sub- water heat exchange.
6. the method for polytetrafluoroethylene (PTFE) reaction temperature, its feature are adjusted according to claim 5
It is, controls the pressure of air pressure tank to be 0.2Mpa~0.25Mpa with the air supply tank, use air pressure
The liquid level of deionized water is at 1/2~2/3 height in the automatic exhaust steam valve Air Valve Control tank of tank top.
7. the method for polytetrafluoroethylene (PTFE) reaction temperature, its feature are adjusted according to claim 5
It is, deionized water temperature after preheater is preheated is 50 ± 3 DEG C, and preheater is used
Heating medium be low-pressure steam.
8. the method for polytetrafluoroethylene (PTFE) reaction temperature, its feature are adjusted according to claim 5
It is, the deionized water internal circulating load is 25~35 times per hour of ptfe autoclave body
Product.
9. the method for polytetrafluoroethylene (PTFE) reaction temperature, its feature are adjusted according to claim 5
It is, the lift of the water circulating pump is 50m；The scope of polytetrafluoroethylene (PTFE) reaction temperature is
73.5~120 DEG C.
10. according to the method for any regulation polytetrafluoroethylene (PTFE) reaction temperature of claim 5~9,
Characterized in that, the heating heat exchanger is plate type heat exchanger, using low-pressure steam as heating medium,
The cooling heat exchanger is plate type heat exchanger, using water that temperature is 4~8 DEG C as cooling medium.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610145047.6A CN107188995B (en) | 2016-03-14 | 2016-03-14 | A kind of device and its application for adjusting polytetrafluoroethylene (PTFE) reaction temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610145047.6A CN107188995B (en) | 2016-03-14 | 2016-03-14 | A kind of device and its application for adjusting polytetrafluoroethylene (PTFE) reaction temperature |
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| CN107188995A true CN107188995A (en) | 2017-09-22 |
| CN107188995B CN107188995B (en) | 2019-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110005940A (en) * | 2018-01-04 | 2019-07-12 | 中昊晨光化工研究院有限公司 | A kind of tetrafluoroethylene monomer measuring tank and stocking system with air temperature type vaporizer |
| CN112831407A (en) * | 2020-12-25 | 2021-05-25 | 江苏大明生物工程装备有限公司 | Large-scale aerobic fermentation jar with agitator |
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| CN107188995B (en) | 2019-01-04 |
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