CN1907549A - Stainless steel net sintering polytetrafluoroethylene film and process for making same - Google Patents
Stainless steel net sintering polytetrafluoroethylene film and process for making same Download PDFInfo
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- CN1907549A CN1907549A CN 200610048461 CN200610048461A CN1907549A CN 1907549 A CN1907549 A CN 1907549A CN 200610048461 CN200610048461 CN 200610048461 CN 200610048461 A CN200610048461 A CN 200610048461A CN 1907549 A CN1907549 A CN 1907549A
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Abstract
The invention relates to a stainless steel mesh sintered politef film and relative preparation, wherein it uses stainless steel network as base; immerges it with politef emulsion and sinters it for three and four times; forms porous politef film on the surface of stainless steel network; the diameter of porous politef film is 0.5-2 mum; the porous politef film uses kinds of emulsion agents and chemical reaction to control the diameter while the effective porous rate is above 96%; compared with present product, it has stable diameter, strong adhesive with base, long service life, and lower cost, while the application temperature is higher than 300Deg. C.
Description
Technical field:
The present invention relates to a kind of high-temperature dust removal, water-oil separating nethike embrane, relate in particular to a kind of stainless (steel) wire sintering polytetrafluoroethylfilm film and preparation technology thereof who is used for power transformer, large hydraulic equipment, power plant unit and the water-oil separating of steel industry press and various Industrial Stoves flue gas ash removals
Background technology:
The hydraulic oil of power plant unit turbine oil, transformer oil, steel industry press oil, large hydraulic equipment and the lubricated wet goods of various machineries.After using a period of time, water content in oil increases, and oil is emulsion deterioration gradually, the one, quickened machine parts, pipe fitting corrosion in addition, the 2nd, make oily degradation, lose original function, the various dewater units that current each producer releases one after another: 1) coarse separation formula oil conditioner, adopt the foreign paper filter material, carry out surperficial breakdown of emulsion, coalescent, separation principle, realize water-oil separating, this machine one is a complex structure, and the life-span is short, the use of can not regenerating, the price height, maintenance cost is big; The 2nd, this material temperature tolerance is poor, can not handle the high viscosity oil product; The 3rd, very big to water content in some original oil, handle that back Water in oil amount is less demanding (to be used very effective under 〉=100ppm) the operating mode, but the index of handling back on-fuel Water in oil amount requirement＜40PPm is difficult to reach, particularly to transformer oil, that is just more difficult for the oil product of transformer wet goods Water in oil requirement≤10PPm, is U.S. PALL company coarse separation formula oil conditioner, after turbine oil is handled, the Water in oil amount is≤50PPm (free water), and costs an arm and a leg.2) vacuum oil purifier, multi-stage vacuum oil conditioner, and even super reconditioner etc., mechanism's complexity is huge, price is very high, operating cost is big, complicated operation will reach≤10PPm, even≤4ppm that also be suitable difficulty.
In addition, various high-temperature flue gas, exhaust gas discharging or utilization all need filtration, purification.Gas behind cyclone dust removal and the electric precipitation can not reach discharging standards.And sack cleaner serviceability temperature≤280 ℃, some blast furnace flue gas, the processing of Industrial Stoves flue gas, some also need add precooler to adapt to the heatproof requirement of filter bag, wastes energy, and increases in the cost, and secondary pollution is arranged.Though stainless steel fibre sintering felt filter material energy high temperature resistant (≤480 ℃) also can reach emission request, the price height, service life is short, and operating maintenance takes expensive, and the use field is restricted.At present, all adopt import paper facer holes, coalescent, the principle of separating in the domestic water-oil separating technology, the long-term empirical evidence heat resistance of using is poor, service life short, problem such as the use of can not regenerating, price height and definite research topic.
Summary of the invention:
In order to solve the separation of electric power transformer oil, the water-oil separating of large hydraulic equipment, the difficult problem of the turbine oil recovery use of power plant unit and the water-oil separating of steel industry press oil;
The purpose of this invention is to provide a kind of permanently effective water-oil separating material, this water-oil separating material active porosity height, it is stable to have pore size, firm with the bond strength of base material, be difficult for peeling off, heat resistance height, long service life, price is low, and the stainless (steel) wire sintering polytetrafluoroethylfilm film and the preparation technology thereof that use after the repeated washing many times
Another object of the present invention provides a kind of preparation technology simple, easily row, stainless (steel) wire voided polytetrafluoroethylene film preparation technology that cost of manufacture is low.
Technical scheme of the present invention realizes in the following manner:
A kind of stainless (steel) wire voided polytetrafluoroethylene film, it adopts stainless (steel) wire as base material, through ptfe emulsion dipping, sintering, forms voided polytetrafluoroethylene film on the stainless (steel) wire surface, and it is characterized in that: the voided polytetrafluoroethylene film aperture is 0.5-2um.
The voided polytetrafluoroethylene film aperture is 0.5-0.7um.
The voided polytetrafluoroethylene film aperture is 1-2um.
At least 7,000 ten thousand or 3,500 ten thousand holes of every square centimeter of voided polytetrafluoroethylene film.
The polytetrafluoroethylene (PTFE) molecular weight is at least 2,300,000, the average 1.5-3um of polytetrafluoroethylgranule granule diameter
A kind of stainless (steel) wire voided polytetrafluoroethylene film preparation technology, it adopts stainless (steel) wire as base material, through ptfe emulsion dipping, sintering, forms voided polytetrafluoroethylene film on the stainless (steel) wire surface, and its operating procedure is:
One, preparation maceration extract:
(1) use the ptfe emulsion thin up to solid content 22-25%
(2) molecular weight polyethylene glycol 200 thin ups are to 8-10%
(3) dimethylacetylamide molecular weight 87.12 thin ups are to 3-5%
(4) after step (1) (2) (3) is finished, be by weight
(1): (2): (3)=adding container in stir at 1: 0.1: 0.05, stand-by behind the net filtration;
Two, stainless (steel) wire is put into dilute sulfuric acid and carried out pickling, put into sig water then and carry out neutralization reaction, put into the clear water rinsing after the etching to aqueous solution neutrality;
Three, stainless (steel) wire is sent into carried out drying in the baking oven streamline;
Four, dried stainless (steel) wire is immersed in the steeping liq entirely, carries out first sintering then, the sintering temperature first warm area 200-210 degree centigrade; The second warm area 290-310 degree centigrade; Three-temperature-zone 350-380 degree centigrade, omnidistance sintering time 10-20 minute;
Five, the nethike embrane that first sintering is crossed carries out the same sintering second time;
Six, the nethike embrane that the second time, sintering was crossed is carried out same for the third time sintering, the nethike embrane aperture behind the sintering is 0.5-1um.
A kind of stainless (steel) wire voided polytetrafluoroethylene film preparation technology according to claim 6, it is characterized in that: before second time sintering, the thiourea solution of adding 33% in maceration extract, addition is the 0.005-0.4% of maceration extract total amount, carry out behind the nethike embrane dipping that first sintering is crossed the same second time, for the third time with the 4th sintering, the nethike embrane aperture behind the sintering is 1-2um.
Every square centimeter in nethike embrane behind the described sintering is to being less than 7,000 ten thousand holes
Every square centimeter in nethike embrane behind the described sintering is to being less than 3,500 ten thousand holes
Described dilute sulfuric acid aqueous solution is to adopt sulfuric acid 98% to convert water to be diluted to pH value 2.5; Dilute alkaline aqueous solution is to adopt alkali 96% to convert water to be diluted to pH value 10-11.
The sintering filter membrane of this nethike embrane has superpower hydrophobicity and lipophile, according to the difference of oil product and to handling the requirement of back oil product, can make the film in different apertures, can realize taking off impurity and water-oil separating fast, also can be used for aerosol moisture from.
The present invention adopts multiple pore-foaming agent, according to chemical reaction mechanism, makes the aperture of film form effective porosity in control range and reaches more than 96%.Compare with the stretched film of external invention, have pore size and stablize, firm with combining of base material, be difficult for peeling off, long service life is used after the repeated washing many times, solved the high viscosity oil product, need at high temperature realize a water-oil separating and a difficult problem very low the moisture of oil requirement.As, we are with the folding cylinder filter that is processed into of stainless (steel) wire sintered membrane filter material, be installed on the static test platform initial resistance≤500pa, filtering 〉=0.5 μ m particle, filter efficiency 99.92%, filter medium is moisture 30% diesel oil, and Water in oil amount≤12ppm/kg after this filter first separation meets national GJB689 standard code fully, as process secondary separation, Water in oil amount≤4ppm.If be used for jet fuel water-oil separating, because its viscosity is little, water-oil separating is easier than diesel oil, (Water in oil amount after China's jet fuel water-oil separating≤15ppm) at present that the Water in oil amount can be still less.
Good effect of the present invention is: the present invention adopts the multiple emulsion that causes to utilize chemical reaction mechanism that aperture formation effective drainage porosity in the scope of control is reached more than 96%, compare with the stretched film of external invention that to have a pore size stable, firm with the bond strength of base material, be difficult for peeling off, long service life is also used after the repeated washing many times.Long-term serviceability temperature＞=300 degrees centigrade.Solved the water-oil separating problem of high temperature oil product; And price is low.
The specific embodiment:
The invention will be further described below in conjunction with embodiment:
Embodiment one:
One, preparation maceration extract:
(1) use ptfe emulsion (Japanese import) thin up to solid content 22-25%
(2) molecular weight polyethylene glycol 200 thin ups are to 8-10%
(3) dimethylacetylamide molecular weight 87.12 thin ups are to 3-5%
(4) after step (1) (2) (3) is finished, be by weight
(1): (2): (3)=adding container in stir at 1: 0.1: 0.05, stand-by behind the net filtration;
Two, stainless (steel) wire is put into employing sulfuric acid 98% and converted the dilute sulfuric acid aqueous solution that water is diluted to pH value 2.5; Put into then and adopt alkali 96% to convert water to be diluted to pH value 10-11 dilute alkaline aqueous solution and to carry out neutralization reaction, put into the clear water rinsing after the etching to aqueous solution neutrality;
Three, stainless (steel) wire is sent into carried out drying in the baking oven streamline;
Four, dried stainless (steel) wire is immersed in the steeping liq entirely evenly sends into automatically, carry out first sintering then, the sintering temperature first warm area 200-210 degree centigrade through cylinder; The second warm area 290-310 degree centigrade; Three-temperature-zone 350-380 degree centigrade, omnidistance sintering time 10-20 minute;
Five, the nethike embrane that first sintering is crossed carries out the same sintering second time;
Six, the nethike embrane that the second time, sintering was crossed is carried out same for the third time sintering, the nethike embrane aperture behind the sintering is 0.5-1um; Polytetrafluoroethylene (PTFE) nethike embrane degree of crystallinity 40%; Every square centimeter in nethike embrane behind the sintering is to being less than 7,000 ten thousand holes.
Embodiment two:
Preparation technology is with embodiment one, and difference is:
Before second time sintering, the thiourea solution of adding 33% in maceration extract, addition is the 0.005-0.4% of maceration extract total amount, carry out behind the nethike embrane dipping that first sintering is crossed the same second time, for the third time with the 4th sintering, the nethike embrane aperture behind the sintering is 1-2um; Every square centimeter in nethike embrane behind the sintering is to being less than 3,500 ten thousand holes
According to the requirement of nethike embrane aperture, can regulate sintering number and obtain different apertures.
Test result:
Be processed into drum with stainless (steel) wire sintered membrane filtrate is folding, be installed on the static test platform.Initial resistance＜=500pa filters alcoholic strength＞=0.5um99.2% relatively, water content in the diesel oil＞=30%, and Water in oil amount＜=12ppm/kg (first separation) meets national GJB689 files specify after separating, and satisfies the operating condition requirement
The present invention facts have proved, can be fast with the oil-in-water particle breakdown of emulsion of 0.4 μ m, separate, be agglomerated into the particle water of 2000-5000 μ m, the Water in oil amount≤4ppm after secondary separation.
The filter that the stainless (steel) wire filter material of sintering filter membrane aperture 1--2 μ m is made can be with the hydraulic oil of viscosity 〉=30 li holder, the water in the turbine oil, Water in oil amount≤8ppm after secondary separation.Utilize this film resistance and high temperature resistance property, can improve oily temperature drop low viscosity, handle the water-oil separating problem of high viscosity oil product.
The filter that the stainless (steel) wire filter material of sintering filter membrane aperture 50--80 μ m is made can be with aerosol moisture from coming out, wherein major function be fog with saturated shape be agglomerated into 〉=globule of 2000 μ m separates automatically and falls into water storage tank.
This nethike embrane is compared with external paper material, and increase substantially service life, and the water-oil separating quick function more obviously rises, and the equipment speed of service can improve more than 2 times, and separating effect meets the water-oil separating national standard under the condition in different apertures.Gross blockage factor reduces, and operation hours prolongs, and reduces the operating maintenance cost.
Use this sintering filter membrane to make the reconditioner that filter material is made, realize impurity filtering, water-oil separating oil, the aerosol water separation function, it is simple in structure, and volume is little, price is low, and the life-span is long, and is reliability and durability, the scope of application is wide, improves the reclaimed oil grade, prolongs the machinery equipment life-span, reduce the operating maintenance expense, improved economic benefit greatly
The membrane filtration material that uses the technology of the present invention to produce can long-term work under≤380 ℃ of situations, and the gas after the processing meets discharging standards.
In addition, this sintering filter membrane is high temperature resistant, the blowback dust is easily peeled off, and can repeatedly clean repeatedly and use, and durable in use, the life-span is long, good dedusting effect, and volume is little, low price, the operating maintenance expense is low, has also improved considerable economic for enterprise.
High-temperature dust removal and useful dust that this nethike embrane also can be used for various Industrial Stoves reclaim, facts have proved: the collapsible cylindrical shape filter bag that is processed into of this nethike embrane, replace various fiber cloth bags, PO PE NT PTFE, its characteristics: can under≤380 ℃ of situations, use smooth surface, easy-to-clean ash for a long time, blowback pressure is little, efficiency of dust collection 〉=99.96%, base material combine with film firmly, can repeatedly clean repeatedly and use, endurance, do not rupture, consistency, the life-span is long, maintenance cost low (not needing often to change filter bag), identical air quantity and filter area situation lower volume are little, overall merit, many than other filter bag good economy performance.This filter material is specially adapted to high temperature flue gas ash removals such as power plant, metallurgical works, chemical plant, cement plant, coke-oven plant, carbon element factory, and discharge standard meets national requirements for environmental protection.Simultaneously, also can increase benefit to recyclings such as the metallic dust in the flue gas, cement dust, carbon dust, organic chemical industry's dust.
According to domestic industry behaviour in service investigation, after big face is promoted, the prolongation in various plant equipment service life of China can be played a role, simultaneously to the high temperature water-oil separating of special trade demand and aerosol moisture from, high temperature dedustings such as power plant, petrochemical plant, metallurgical works, coke-oven plant, cement plant, charing factory, the dustproof waste product that reclaims, desulfurization or the like provides effective filter material, has a extensive future.
Claims (10)
1, a kind of stainless (steel) wire sintering polytetrafluoroethylfilm film, it adopts stainless (steel) wire as base material, through ptfe emulsion dipping, sintering, form voided polytetrafluoroethylene film on the stainless (steel) wire surface, it is characterized in that: the voided polytetrafluoroethylene film aperture is 0.5-2um.
2, stainless (steel) wire sintering polytetrafluoroethylfilm film according to claim 1 is characterized in that: the voided polytetrafluoroethylene film aperture is 0.5-0.7um.
3, stainless (steel) wire sintering polytetrafluoroethylfilm film according to claim 1 is characterized in that: the voided polytetrafluoroethylene film aperture is 1-2um.
4, according to claim 2 or 3 described stainless (steel) wire sintering polytetrafluoroethylfilm films, it is characterized in that: at least 7,000 ten thousand or 3,500 ten thousand holes of every square centimeter of voided polytetrafluoroethylene film.
5, stainless (steel) wire sintering polytetrafluoroethylfilm film according to claim 4, it is characterized in that: the polytetrafluoroethylene (PTFE) molecular weight is at least 2,300,000, the average 1.5-3um of polytetrafluoroethylgranule granule diameter.
6, a kind of stainless (steel) wire sintering polytetrafluoroethylfilm film preparation technology, it adopts stainless (steel) wire as base material, through ptfe emulsion dipping, sintering, forms voided polytetrafluoroethylene film on the stainless (steel) wire surface, and its operating procedure is:
One, preparation maceration extract:
(1) use the ptfe emulsion thin up to solid content 22-25%
(2) molecular weight polyethylene glycol 200 thin ups are to 8-10%
(3) dimethylacetylamide molecular weight 87.12 thin ups are to 3-5%
(4) after step (1) (2) (3) is finished, be by weight
(1): (2): (3)=adding container in stir at 1: 0.1: 0.05, stand-by behind the net filtration;
Two, stainless (steel) wire is put into dilute sulfuric acid and carried out pickling, put into sig water then and carry out neutralization reaction, put into the clear water rinsing after the etching to aqueous solution neutrality;
Three, stainless (steel) wire is sent into carried out drying in the baking oven streamline;
Four, dried stainless (steel) wire is immersed in the steeping liq entirely, carries out first sintering then, the sintering temperature first warm area 200-210 degree centigrade; The second warm area 290-310 degree centigrade; Three-temperature-zone 350-380 degree centigrade, omnidistance sintering time 10-20 minute;
Five, the nethike embrane that first sintering is crossed carries out the same sintering second time;
Six, the nethike embrane that the second time, sintering was crossed is carried out same for the third time sintering, the nethike embrane aperture behind the sintering is 0.5-1um.
7, a kind of stainless (steel) wire sintering polytetrafluoroethylfilm film preparation technology according to claim 6, it is characterized in that: before second time sintering, the thiourea solution of adding 33% in maceration extract, addition is the 0.005-0.4% of maceration extract total amount, carry out behind the nethike embrane dipping that first sintering is crossed the same second time, for the third time with the 4th sintering, the nethike embrane aperture behind the sintering is 1-2um.
8, stainless (steel) wire sintering polytetrafluoroethylfilm film preparation technology according to claim 6 is characterized in that: every square centimeter in the nethike embrane behind the sintering is to being less than 7,000 ten thousand holes.
9, stainless (steel) wire sintering polytetrafluoroethylfilm film preparation technology according to claim 7 is characterized in that: every square centimeter in the nethike embrane behind the sintering is to being less than 3,500 ten thousand holes.
10, stainless (steel) wire sintering polytetrafluoroethylfilm film preparation technology according to claim 9 is characterized in that: dilute sulfuric acid aqueous solution is to adopt sulfuric acid 98% to convert water to be diluted to pH value 2.5; Dilute alkaline aqueous solution is to adopt alkali 96% to convert water to be diluted to pH value 10-11.
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| CNB2006100484611A CN100453152C (en) | 2006-07-26 | 2006-07-26 | Stainless steel net sintering polytetrafluoroethylene film and process for making same |
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| CN100453152C CN100453152C (en) | 2009-01-21 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101518695B (en) * | 2008-02-27 | 2010-12-08 | 中国科学院化学研究所 | Super-hydrophobic and super-oleophilic oil-water separation mesh membrane and preparation method thereof |
| CN101906549A (en) * | 2010-08-17 | 2010-12-08 | 南京航空航天大学 | Porous foam metal based embedded type solid self-lubricating composite material and preparation method thereof |
| CN103585833A (en) * | 2013-11-28 | 2014-02-19 | 新乡市胜达过滤净化技术有限公司 | Bag type dust collector filter bag |
| CN104275097A (en) * | 2013-06-21 | 2015-01-14 | 帕尔公司 | Membrane and method for treating fluids including an organic phase |
| CN104998556A (en) * | 2014-04-22 | 2015-10-28 | 成都百途医药科技有限公司 | Super-hydrophobic polytetrafluoroethylene fiber membrane preparation method |
| CN108771885A (en) * | 2018-05-29 | 2018-11-09 | 广东工业大学 | A kind of preparation method of polytetrafluorethylecoatings coatings water-oil separating filter membrane |
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2006
- 2006-07-26 CN CNB2006100484611A patent/CN100453152C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101518695B (en) * | 2008-02-27 | 2010-12-08 | 中国科学院化学研究所 | Super-hydrophobic and super-oleophilic oil-water separation mesh membrane and preparation method thereof |
| CN101906549A (en) * | 2010-08-17 | 2010-12-08 | 南京航空航天大学 | Porous foam metal based embedded type solid self-lubricating composite material and preparation method thereof |
| CN101906549B (en) * | 2010-08-17 | 2012-11-21 | 南京航空航天大学 | Porous foam metal based embedded type solid self-lubricating composite material and preparation method thereof |
| CN104275097A (en) * | 2013-06-21 | 2015-01-14 | 帕尔公司 | Membrane and method for treating fluids including an organic phase |
| CN103585833A (en) * | 2013-11-28 | 2014-02-19 | 新乡市胜达过滤净化技术有限公司 | Bag type dust collector filter bag |
| CN103585833B (en) * | 2013-11-28 | 2015-04-08 | 新乡市胜达过滤净化技术有限公司 | Bag type dust collector filter bag |
| CN104998556A (en) * | 2014-04-22 | 2015-10-28 | 成都百途医药科技有限公司 | Super-hydrophobic polytetrafluoroethylene fiber membrane preparation method |
| CN108771885A (en) * | 2018-05-29 | 2018-11-09 | 广东工业大学 | A kind of preparation method of polytetrafluorethylecoatings coatings water-oil separating filter membrane |
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