CN109400765A - A kind of vacuum concentration system and method for the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) - Google Patents
A kind of vacuum concentration system and method for the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) Download PDFInfo
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- CN109400765A CN109400765A CN201811546135.2A CN201811546135A CN109400765A CN 109400765 A CN109400765 A CN 109400765A CN 201811546135 A CN201811546135 A CN 201811546135A CN 109400765 A CN109400765 A CN 109400765A
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- polytetrafluoroethylene
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- 239000007788 liquid Substances 0.000 title claims abstract description 72
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 51
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 51
- 239000006185 dispersion Substances 0.000 title claims abstract description 28
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 26
- 230000001681 protective effect Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000498 cooling water Substances 0.000 claims abstract description 12
- 102400000830 Saposin-B Human genes 0.000 claims abstract description 9
- 101800001697 Saposin-B Proteins 0.000 claims abstract description 9
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims abstract description 4
- 238000005286 illumination Methods 0.000 claims abstract description 4
- 239000003995 emulsifying agent Substances 0.000 claims description 14
- 239000006210 lotion Substances 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 6
- 239000000839 emulsion Substances 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000006071 cream Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000005499 meniscus Effects 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000013535 sea water Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 230000008719 thickening Effects 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000012141 concentrate Substances 0.000 abstract description 3
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract description 2
- 238000003486 chemical etching Methods 0.000 abstract description 2
- 239000007800 oxidant agent Substances 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004945 emulsification Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- 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
- C08F6/00—Post-polymerisation treatments
- C08F6/14—Treatment of polymer emulsions
- C08F6/20—Concentration
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The invention belongs to environmentally friendly dispersion liquid preparation technical fields, disclose the vacuum concentration system and method for a kind of environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE), the vacuum concentration system of the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) includes: vertical concentration kettle；Double spiral agitator is installed in vertical concentration kettle, the observation visor on upper cover and kettle intraoral illumination lamp are set；Vertical concentration kettle setting hot water and cooling water double loop；Thermometer；Density tester；Liquidometer；Dispersin polymerization liquid adds internally piloted valve；Pressure vacuum gauge；Demister；Concentration kettle steam enters shell condenser, is mounted on inside vertical concentration kettle, for realizing condensation under the action of cooling water, reduces vacuum pump load.The features such as novel process of the present invention is advanced, stable operation, high production efficiency, cost is relatively low；It is dispersed concentrate treated product, there is brilliant chemical stability and brilliant ability resistant to chemical etching, such as resistance to strong acid, highly basic, strong oxidizer.
Description
Technical field
It is environmentally protective estranged scattered that the invention belongs to environmentally friendly dispersion liquid preparation technical fields more particularly to a kind of polytetrafluoroethylene (PTFE)
The vacuum concentration system and method for liquid.
Background technique
Currently, the prior art commonly used in the trade is such that
Method for concentration currently used for dispersion liquid using adding emulsifier and indifferent salt, stirring be warming up to emulsifier cloud point with
On, the method for stratification obtains concentrate.
In conclusion problem of the existing technology is:
In the prior art, addition emulsification dosage is bigger, and general 5% or more, gained emulsion emulsifiers agent content is high, influences to produce
Product processing performance.
Emulsifier clear liquid amount is big, and environmental protection treatment difficulty is big, at high cost.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of the true of the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE)
Empty concentration systems and method.
The invention is realized in this way a kind of vacuum concentration method of the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE), comprising:
Setting concentration target density and concentration process Liquid level height, target density are 1.5 ± 0.1kg/l, and liquid level is high
Degree is not less than thermometer height 40%~80%, is no more than helical length；
By adjusting agitator speed, it is uniformly evaporated；
Evaporating temperature is by collet hot water and cooling sea water regulating valve chain control, and temperature is at 50 DEG C~60 DEG C；
Liquid level is added valve by dispersin polymerization liquid and is controlled；
The vacuum degree of concentration kettle is -90~-99Kpa.
Further, 10~30r/min of agitator speed.
Further, liquid level is added during valve controlled by dispersin polymerization liquid, Liquid level range: setting value ± 10mm.
Another object of the present invention is to provide a kind of vacuum for implementing the environmentally protective dispersion liquid estranged of the polytetrafluoroethylene (PTFE)
The vacuum concentration system of the environmentally protective dispersion liquid estranged of the polytetrafluoroethylene (PTFE) of method for concentration, the polytetrafluoroethylene (PTFE) are environmentally protective estranged
The vacuum concentration system of dispersion liquid includes:
Vertical concentration kettle；
Double spiral agitator is installed in vertical concentration kettle, for realizing liquid in kettle along stirring axis center decline, along kettle
The circumference closed loop that wall rises convection circulation up and down, is sent to meniscus region for the lotion of heating in time and evaporates in time, realizes evaporation, prevents
Only hot-spot is demulsified；
Observation visor on upper cover and kettle intraoral illumination lamp are set, for directly observing enrichment stage in kettle；
Vertical concentration kettle setting hot water and cooling water double loop, and it is chain with double damper valve, for realizing gradient of temperature, and
Shi Xiuzheng thickening temperature；
Thermometer is mounted in the middle part of kettle body, for ensuring the degree of superheat by hot emulsion；
Density tester is mounted on around the outlet of vertical concentration kettle concentration kettle middle and lower part, up to standard for detecting lotion density
Afterwards, stop concentration；
Liquidometer is mounted at the height 40%~80% of vertical concentration kettle, for demarcating liquid level in kettle；
Dispersin polymerization liquid adds internally piloted valve, adds and is connected to outer scattered polymer fluid, divides for providing in vertical concentration kettle
Dissipate polymer fluid；
Pressure vacuum gauge, it is chain with vacuum pump, it is mounted at the top of vertical concentration kettle, is carried out by the motor frequency conversion of vacuum pump
Kettle presses stability contorting；
Demister is mounted on the steam (vapor) outlet of vertical concentration kettle, condenser is transported to again after cyclonic separation foam, for preventing
Only emulsifier enters condensate liquid with foam emulsifier is caused to be lost, while preventing condensate liquid COD exceeded；
Concentration kettle steam enters shell condenser, is mounted on inside vertical concentration kettle, for real under the action of cooling water
It now condenses, reduces vacuum pump load.
Further, the vacuum concentration system of the environmentally protective dispersion liquid estranged of the polytetrafluoroethylene (PTFE) further comprises:
It condenses tail gas and temperature monitor is set, it is chain with condenser cooling water control valve, for realizing condensing deep control.
Further, the vacuum concentration system of the environmentally protective dispersion liquid estranged of the polytetrafluoroethylene (PTFE) further comprises:
Vacuum system is formed by water ring vacuum pump and vacuum buffer tank；
The draining of condenser and water ring vacuum pump enters condensate liquid accumulator tank, for being recycled after handling.
In conclusion advantages of the present invention and good effect are as follows:
The present invention is novel to be related to a kind of concentration systems for dispersing cream production for environmentally protective polytetrafluoroethylene (PTFE), and the present invention is new
The features such as type technique is advanced, stable operation, high production efficiency, cost is relatively low.This product is milky white liquid, is that tetrafluoroethene is poly-
Dispersion concentration liquid after conjunction in the presence of nonionic surface active agent, polytetrafluoroethylene solids content is in the left and right 60% (wt).
It is dispersed concentrate treated product, there is brilliant chemical stability and brilliant ability resistant to chemical etching, such as resistance to strong acid,
Highly basic, strong oxidizer etc., there is heat-resisting, cold-resistant and wear resistance outstanding, and long-term use temperature range is -200~+250 DEG C.Also
Excellent electrical insulating property, and do not influenced by temperature and frequency.
Detailed description of the invention
Fig. 1 is the vacuum concentration system signal of the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) provided in an embodiment of the present invention
Figure.
In figure: 1, vertical concentration kettle；2, double spiral agitator；3, hot water and cooling water double loop；4, thermometer；5, density
Detector；6, contracting kettle liquidometer；7, pressure vacuum gauge；8, vacuum pump；9, condenser；10, concentration kettle steam enters shell condensation
Device；11, temperature monitor；12, vacuum buffer tank；13, condensate liquid accumulator tank.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
In the prior art, addition emulsification dosage is bigger, and general 5% or more, gained emulsion emulsifiers agent content is high, influences to produce
Product processing performance.
Emulsifier clear liquid amount is big, and environmental protection treatment difficulty is big, at high cost.
In order to solve the above technical problems, below with reference to concrete scheme, the present invention will be described in detail.
Concentration and other similar lotion concentration of the present invention for the dispersion cream production of environmentally protective polytetrafluoroethylene (PTFE).
The present invention just realizes with dedicated unit and is concentrated in vacuo, and has that emulsifier is few, low energy consumption, without emulsifier
The environmental issue of clear liquid processing, concentration process demulsification is few, and emulsifier content is low in product waits many merits.
Using vertical concentration kettle 1, kettle uses double spiral agitator 2, realizes that liquid is along stirring axis center decline in kettle, along kettle
The circumference closed loop that wall rises convection circulation up and down, is sent to meniscus region for the lotion of heating in time and evaporates in time, realizes and uniformly steams
Hair, prevents hot-spot to be demulsified, while improving heat exchange efficiency.
Setting sets observation visor and kettle intraoral illumination lamp in upper cover, can directly observe enrichment stage in kettle.
Hot water and cooling water double loop 3 is arranged in concentration kettle, and chain with double damper valve, realizes two kinds of control function of gradient of temperature
Can, thickening temperature is corrected in time, reduces demulsification.
4 temperature measuring point of thermometer is arranged in the middle part of kettle body, it is ensured that is in proper states by the degree of superheat of hot emulsion.
Concentration kettle middle and lower part near exit density of setting detector 5 stops concentration after lotion density is up to standard.
It is chain that contracting kettle setting liquidometer 6 and dispersin polymerization liquid add internally piloted valve, liquid level stabilizing in holding kettle.
Pressure vacuum gauge 7 is set at the top of concentration kettle and vacuum pump 8 is chain, realizes that kettle pressure stablizes control by the motor frequency conversion of pump
System.
Demister is arranged in concentration kettle steam (vapor) outlet, removes condenser 9 again after cyclonic separation foam, effectively prevent emulsifier with bubble
Foam enters condensate liquid and emulsifier is caused to be lost, while preventing condensate liquid COD exceeded.
Concentration kettle steam enters shell condenser 10, and condensation is realized under the action of cooling water, reduces vacuum pump load.
It condenses tail gas and temperature monitor 11 is set, it is chain with condenser cooling water control valve, realize condensing deep control.
Vacuum system is made of water ring vacuum pump 6 and vacuum buffer tank 12.
The draining of condenser and water ring vacuum pump enters condensate liquid accumulator tank 13, is recycled after processing.
Method for concentration provided in an embodiment of the present invention includes:
According to production task, setting concentration target density and concentration process Liquid level height, target density 1.5 ±
It is arranged within the scope of 0.1kg/l, liquid level is generally arranged in 40%~80% range, cannot be below thermometer height, no more than
Helical length.
By adjusting agitator speed, control is uniformly evaporated, and the range of speeds exists: 10~30r/min；
Evaporating temperature is existed by collet hot water and cooling sea water regulating valve chain control, temperature range: 50 DEG C~60 DEG C；
Liquid level adds valve control by dispersin polymerization liquid, Liquid level range: setting value ± 10mm；
The vacuum degree of concentration kettle is by vacuum pump frequency control, pressure control range: -90~-99Kpa.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of vacuum concentration method of the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE), which is characterized in that the polytetrafluoroethylene (PTFE)
The vacuum concentration method of environmentally protective dispersion liquid estranged includes:
Setting concentration target density and concentration process Liquid level height, target density are 1.5 ± 0.1kg/l, and liquid level exists
40%~80%, it is not less than thermometer height, is no more than helical length；
By adjusting agitator speed, it is uniformly evaporated；
Evaporating temperature is by collet hot water and cooling sea water regulating valve chain control, and temperature is at 50 DEG C~60 DEG C；
Liquid level is added valve by dispersin polymerization liquid and is controlled；
The vacuum degree of concentration kettle is -90~-99Kpa.
2. the vacuum concentration method of the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) as described in claim 1, which is characterized in that stir
Mix 10~30r/min of device revolving speed.
3. the vacuum concentration method of the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) as described in claim 1, which is characterized in that liquid
Position is added during valve controlled by dispersin polymerization liquid, Liquid level range: setting value ± 10mm.
4. a kind of polytetrafluoroethyl-ne for the vacuum concentration method for implementing the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) described in claim 1
The vacuum concentration system of the environmentally protective dispersion liquid estranged of alkene, which is characterized in that the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE)
Vacuum concentration system includes:
Vertical concentration kettle；
Double spiral agitator is installed in vertical concentration kettle, for realizing liquid in kettle along stirring axis center decline, along kettle wall
The circumference closed loop risen convection circulation up and down, is sent to meniscus region for the lotion of heating in time and evaporates in time, realizes evaporation, prevents office
Portion's overheat demulsification；
Observation visor on upper cover and kettle intraoral illumination lamp are set, for directly observing enrichment stage in kettle；
Vertical concentration kettle setting hot water and cooling water double loop, and it is chain with double damper valve, for realizing gradient of temperature, repair in time
Positive thickening temperature；
Thermometer is mounted in the middle part of kettle body, for ensuring the degree of superheat by hot emulsion；
Density tester, be mounted on vertical concentration kettle concentration kettle middle and lower part outlet around, for detect lotion density it is up to standard after, stop
Only it is concentrated；
Liquidometer is mounted at the height 40%~80% of vertical concentration kettle, for demarcating liquid level in kettle；
Dispersin polymerization liquid adds internally piloted valve, adds and is connected to outer scattered polymer fluid, disperses to gather in vertical concentration kettle for providing
Close liquid；
Pressure vacuum gauge, it is chain with vacuum pump, it is mounted at the top of vertical concentration kettle, kettle pressure is carried out by the motor frequency conversion of vacuum pump
Control；
Demister is mounted on the steam (vapor) outlet of vertical concentration kettle, condenser is transported to again after cyclonic separation foam, for preventing cream
Agent enters condensate liquid with foam and emulsifier is caused to be lost, while preventing condensate liquid COD exceeded；
Concentration kettle steam enters shell condenser, is mounted on inside vertical concentration kettle, cold for realizing under the action of cooling water
It is solidifying, reduce vacuum pump load.
5. the vacuum concentration system of the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) as claimed in claim 4, which is characterized in that institute
The vacuum concentration system for stating the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) further comprises:
It condenses tail gas and temperature monitor is set, it is chain with condenser cooling water control valve, for realizing condensing deep control.
6. the vacuum concentration system of the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) as claimed in claim 4, which is characterized in that institute
The vacuum concentration system for stating the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) further comprises:
Vacuum system is formed by water ring vacuum pump and vacuum buffer tank；
The draining of condenser and water ring vacuum pump enters condensate liquid accumulator tank, for being recycled after handling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811546135.2A CN109400765A (en) | 2018-12-18 | 2018-12-18 | A kind of vacuum concentration system and method for the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811546135.2A CN109400765A (en) | 2018-12-18 | 2018-12-18 | A kind of vacuum concentration system and method for the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) |
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| CN109400765A true CN109400765A (en) | 2019-03-01 |
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| CN201811546135.2A Pending CN109400765A (en) | 2018-12-18 | 2018-12-18 | A kind of vacuum concentration system and method for the environmentally protective dispersion liquid estranged of polytetrafluoroethylene (PTFE) |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114470819A (en) * | 2021-12-30 | 2022-05-13 | 山东华夏神舟新材料有限公司 | Concentration equipment and method for efficiently preparing fluorine-containing polymer aqueous dispersion |
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2018
- 2018-12-18 CN CN201811546135.2A patent/CN109400765A/en active Pending
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Cited By (2)
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Application publication date: 20190301 |