CN108328696A - A kind of preparation method of the compound coalescence material of modified Teflon for metallurgical emulsifying liquid waste water de-oiling - Google Patents
A kind of preparation method of the compound coalescence material of modified Teflon for metallurgical emulsifying liquid waste water de-oiling Download PDFInfo
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- CN108328696A CN108328696A CN201710050813.5A CN201710050813A CN108328696A CN 108328696 A CN108328696 A CN 108328696A CN 201710050813 A CN201710050813 A CN 201710050813A CN 108328696 A CN108328696 A CN 108328696A
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- modified teflon
- wire
- polytetrafluoroethylene fibre
- fiber
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a kind of preparation methods of the compound coalescence material of modified Teflon for metallurgical emulsifying liquid waste water de-oiling, using following steps：(1), it using the polytetrafluoroethylene fibre of 50 60um of diameter as raw material, is impregnated in the sulfuric acid solution that mass concentration is 25% 30%, under conditions of 45 60 DEG C for the treatment of temperature, constant temperature is handled 1 1.5 hours；(2), the surface treatment liquid of polytetrafluoroethylene fibre is cleaned up using distilled water, and is dried；It is placed in the polytetrafluoroethylene fibre after drying in propenyl steam, handles 30 40min；(3), it is that the modified Teflon fiber shuffling obtained in backing material and step (2) is woven into silk screen to select the wire with oleophilic drainage performance of a diameter of 100 150um, and the porosity of the silk screen is 0.977.
Description
Technical field
The invention belongs to water-treatment technology fields, and in particular to a kind of modification poly- four for metallurgical emulsifying liquid waste water de-oiling
The preparation method of the compound coalescence material of vinyl fluoride.
Background technology
In recent years, combined type polymerization of fluid drops isolation technics develops into a kind of new and effective isolation technics, combined type drop
Polymerization isolation technics is detached with respect to the difference of coalescence material affinity using oil-water two.Key problem in technology is that fiber is poly-
Tie material.It is to add packing section in common oil separator leading portion that separation material, which fills initial form, fills rubble equigranular object, borrows
This improves oil removal efficiency.Since the crushed rock filler grain size used at that time is larger, coalescence performance is poor, and oil removal efficiency increase is not
Obviously, thus coalescent deoiling technology thereafter for quite a long time in do not attract people's attention.Currently, with material
The fast development of science provides the coalescence material of better performances for the application of coarse technology, thus coarse technology is just sent out
Exhibition is got up, and the innovation of combined type polymerization of fluid drops isolation technics has been pushed.
Application No. is 201510124434.7 Chinese patent applications to disclose a kind of inorganic matter coating oil-water separating net
Preparation method.Ludox is injected the reactor equipped with template by the technical solution mentioned by the patent application under condition of negative pressure
In, then reactor is sealed and is put into insulating box by submergence template 2 hours, 60 DEG C are reacted 12 hours, and removing template is gone to be consolidated
The compound polyhedron of state bulk micro-nano is fully ground to powder after its drying and pours into the reactor equipped with dispersion liquid acetone
In, the compound polyhedron suspension of micro-nano that low-surface-energy is silane coupler modified, and reaction has been modified after 12 hours is added, leads to
It crosses the volatilization of acetone or adds again, it is 0.5%-20% to make solid masses percent concentration in suspension.The invention is separable
The oil-based liquid not soluble in water such as vapour, diesel oil also separates the organic oil-based solvent of esters of low-solubility.
Application No. is 201310590347.1 Chinese patent applications to disclose a kind of Composite metal coalescent filter element.It is this multiple
Closing metal filtering core has inner frame and outer skeleton, is followed successively by by inner frame to outer skeleton：Silk screen, cloth fluid layer, demulsification layer, lipophile are not
Become rusty steel coalescing layer, set layer, cloth fluid layer, silk screen.Coalescing layer is improved using high temperature resistant, corrosion resistant lipophile stainless steel material
Oil absorbing effect accelerates water-oil separating.Demulsification layer is metal felt, and precision is 100-200 mesh；Set layer is metal net, precision
For 50-100 mesh.
Metallurgy industry emulsifying liquid waste water is most intractable a kind of dirty in prior art comparison essentially from cold rolling link
Water not only results in environmental pollution, can also cause the serious waste of water resource if direct emission.It is useless to iron and steel enterprise's cold rolling
Water is handled, it is made to meet cold rolling wastewater discharge standard and recycle water standard, can not only reduce iron and steel enterprise sewage row
High-volume, handling recirculated water up to standard can also reuse, and improve cycling utilization of wastewater rate.China's development of iron ＆ steel industry in recent years
Rapidly, the continuous improvement for promoting cold-rolling production process, makes great progress on water-saving technology.And rolling mill production line conduct
One of the main direction of development of steel industry still consumes a large amount of industrial waters in production process and generates that type is more, ingredient is multiple
Miscellaneous waste water, especially wherein generate to be not easy biodegradable high concentration emulsifying wastewater increasing, it is difficult to by locating
It manages up to standard.There is an urgent need to a kind of technologies can solve the problems, such as caused by cold rolling wastewater.At present the oil removing process that mainly uses for
Air supporting, hyperfiltration process.Both methods is required to use a large amount of chemical agents, and operating cost is higher, also will produce dross, dope
Equal hazardous wastes, economic and environmental benefit are poor.
Invention content
Technical problem to be solved by the present invention lies in provide a kind of property can be used for the processing of metallurgy industry emulsifying liquid waste water
The preparation method of energy preferably modified Teflon fiber, technical problem to be solved can be by the following technical programs
To implement.
A kind of preparation method of the compound coalescence material of modified Teflon for metallurgical emulsifying liquid waste water de-oiling, it is special
Point is, using following steps：
(1), molten in the sulfuric acid that mass concentration is 25%-30% using the polytetrafluoroethylene fibre of diameter 50-60um as raw material
It is impregnated in liquid, under conditions of 45-60 DEG C for the treatment of temperature, constant temperature is handled 1-1.5 hours；
(2), the surface treatment liquid of polytetrafluoroethylene fibre is cleaned up using distilled water, and is dried；It will
Polytetrafluoroethylene fibre after drying is placed in propenyl steam, processing 30-40mi n；
(3), it is backing material and step (2) to select the wire with oleophilic drainage performance of a diameter of 100-150um
In obtained modified Teflon fiber shuffling be woven into silk screen, the porosity of the silk screen is 0.977.
As one of the preferred embodiment of the present invention, in step (3) the step of shuffling networking be：
A, wire and modified Teflon fiber are with 1：The kink of 1 ratio becomes single composite fiber；
B, every three strands of composite fibres kink carries out netted braiding again at one establishment fiber.
Also it is used as the preferred embodiment of the present invention, the mass concentration of sulfuric acid solution is 30% in step (1), and treatment temperature is
50 DEG C, constant temperature processing time is 1 hour.
It is 304 stainless steel wires to be also used as one of the preferred embodiment of the present invention, the wire.
As a further improvement on the present invention, further include the step cleaned and dried to wire before kink.
The present invention provides a kind of compound coalescence materials of modified Teflon-stainless steel wire for metallurgical emulsion oil removing
Material, after being handled the material using above-mentioned technical proposal, water-oil separating performance is efficient, also has good physical and chemical performance,
It is cheap, can high temperature, soda acid environment in for a long time stablize use, can be widely popularized to the industry of all kinds of water-oil separating links
Using.
The combined type polymerization of fluid drops isolation technics method is not necessarily to additional chemical reagent, and non-secondary pollution, device structure is simple, accounts for
Ground area is small, and operating cost is relatively low, and plant maintenance is convenient, is convenient for industrial management.
Description of the drawings
Fig. 1 is the contact angle demonstration of modified Teflon and water；
Fig. 2 is that the contact angle of modified Teflon and oil is demonstrated；
Specific implementation mode
The specific implementation mode of the present invention is further detailed below in conjunction with attached drawing.
Modified Teflon compound coalescence material of the present invention for metallurgical emulsifying liquid waste water oil removing, need by
Certain surface modification treatment and compound establishment.The polytetrafluoroethylene fibre for selecting diameter 50-60um, in a concentration of 30% sulphur
It is impregnated in acid solution, under conditions of 50 DEG C for the treatment of temperature, constant temperature is handled 1 hour.After treatment, using distilled water by surface
Liquid cleans up, and is dried.Polytetrafluoroethylene fibre after drying is positioned in propenyl steam, handles 30-
40min.The hydrophilic linea angulata of treated polytetrafluoroethylene fibre increases, the surface contact angle with water between 110 °~120 °,
Hydrophobicity is reinforced, and the contact angle with oil is 48.8 °.
Modified Teflon fiber is in all kinds of modified lipophilic fibers, and chemical property is stablized the most, and service life is long, property
Valence is relatively high, and the strong this material of water-oil phase selectivity has the characteristics that antiacid alkali resistant, resists various organic solvents, is practically insoluble in
All solvents.Meanwhile modified Teflon also has the characteristics that heat safe, corrosion-resistant, nonhazardous, ageing-resistant, industry is answered
With in extensive range.
But modified Teflon fiber is more soft, is easy to collapse, deform, and is caused in equipment During Process of Long-term Operation tight
Ghost image is rung, and is needed additional backing material shuffling to reach appropriate mechanical strength, can be met the condition of industrial applications.Shuffling material
Using 304 stainless steel wires, using a diameter of 100-150um, cleaning and drying are completed before compound establishment.Modified Teflon with
304 stainless steel filaments are first with 1：The kink of 1 ratio becomes single composite fiber, and every three strands of composite fibres kink is fine at one establishment
Dimension, finally working out networking using establishment fiber with high efficiency voidage 0.977, (water-oil separating material voidage divides three types：
Standard type 0.981；High efficiency 0.977；High-transparency 0.9875.This technical solution uses heavy duty detergent porosity), form final change
The property compound coalescence material of -304 stainless steel wire of polytetrafluoroethylene (PTFE), the material in commercial Application, using roll up in the form of bundle as filler into
It exercises and uses.
For a better understanding of the present invention, with reference to the specific embodiment content that the present invention is furture elucidated.Using
Modified polytetrafluoroethylcomposite composite material prepared by above-mentioned technical proposal handles the dense oily waste water of certain cold rolling mill, to poly- under different flow
Tetrafluoroethylene fiber carries out long-term continuity experiment with metallic fiber filler, and the following table 1 is the filler experiment data.
Table 1：Modified Teflon composite fibre oil removal rate
Shown by upper table 1, the oil removal rate of modified+304 compounded mix of polytetrafluoro is relatively stable, and maintain one it is higher
Level, outlet oil content maintain 100mg/L or so, and deoiling effect is preferable, stabilised efficiency.Handle flow 30L/h, 34L/h and
Average oil removal rate is all higher than 70% when 45L/h, and gap is not notable；When handling flow 60L/h, oil removal rate is relatively low, and unstable
It is fixed, it is not suitable for.From the point of view of the variation tendency of oil removal rate, although as the oil removal rate of the raising equipment of processing flow is declined,
But declines degree to be not obvious, illustrate that the filler can stablize the oily waste water of processing larger flow.+ 304 filler of polytetrafluoro exists
The very high water of oil content can be handled under suitable flow, and there is good shock resistance to the sharp increase of entrance oil concentration
Property.Under suitable conditions, polytetrafluoro filler can keep 90% or more oil removal rate, and outlet oil content is made to reach 70mg/L
Below.
Fig. 1 and Fig. 2 is respectively the contact angle of modified polytetrafluoroethylene packing and water and oil, signal under the microscope
Figure.Tangent is contact angle in drop direction and horizontal angle.Contact angle is smaller, and the compatibility of material and the drop is got over
It is good.As shown, the surface contact angle of modified Teflon and water, between 110 °~120 ° (Fig. 1), hydrophobicity is reinforced, with
The contact angle of oil is about 48.8 ° (Fig. 2)；Nano modification polytetrafluoroethylene material is not hydrophilic, oleophylic.
Claims (5)
1. a kind of preparation method of compound coalescence material of modified Teflon for metallurgical emulsifying liquid waste water de-oiling, feature
It is, using following steps：
(1), using the polytetrafluoroethylene fibre of diameter 50-60um as raw material, in the sulfuric acid solution that mass concentration is 25%-30%
It impregnates, under conditions of 45-60 DEG C for the treatment of temperature, constant temperature is handled 1-1.5 hours；
(2), the surface treatment liquid of polytetrafluoroethylene fibre is cleaned up using distilled water, and is dried；It will dry
Polytetrafluoroethylene fibre afterwards is placed in propenyl steam, handles 30-40min；
(3), it is to be obtained in backing material and step (2) to select the wire with oleophilic drainage performance of a diameter of 100-150um
To modified Teflon fiber shuffling be woven into silk screen, the porosity of the silk screen is 0.977.
2. preparation method according to claim 1, which is characterized in that the step of shuffling braiding networking is in step (3)：
A, wire and modified Teflon fiber are with 1：The kink of 1 ratio becomes single composite fiber；
B, every three strands of composite fibres kink carries out netted braiding again at one establishment fiber.
3. preparation method according to claim 1, which is characterized in that the mass concentration of sulfuric acid solution is in step (1)
30%, treatment temperature is 50 DEG C, and constant temperature processing time is 1 hour.
4. the preparation method according to claims 1 to 3, which is characterized in that the wire is 304 stainless steel wires.
5. preparation method according to claim 2, which is characterized in that further include before kink to wire carry out cleaning and
Dry step.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710050813.5A CN108328696A (en) | 2017-01-20 | 2017-01-20 | A kind of preparation method of the compound coalescence material of modified Teflon for metallurgical emulsifying liquid waste water de-oiling |
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| CN201710050813.5A CN108328696A (en) | 2017-01-20 | 2017-01-20 | A kind of preparation method of the compound coalescence material of modified Teflon for metallurgical emulsifying liquid waste water de-oiling |
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| CN201710050813.5A Pending CN108328696A (en) | 2017-01-20 | 2017-01-20 | A kind of preparation method of the compound coalescence material of modified Teflon for metallurgical emulsifying liquid waste water de-oiling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110935415A (en) * | 2019-12-10 | 2020-03-31 | 华东理工大学 | Modified polytetrafluoroethylene composite coalescence filler for oil-water mixed liquid separation |
| CN111995087A (en) * | 2019-05-27 | 2020-11-27 | 宝山钢铁股份有限公司 | Cold rolling leveling waste liquid treatment method based on forward osmosis theory |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995087A (en) * | 2019-05-27 | 2020-11-27 | 宝山钢铁股份有限公司 | Cold rolling leveling waste liquid treatment method based on forward osmosis theory |
| CN110935415A (en) * | 2019-12-10 | 2020-03-31 | 华东理工大学 | Modified polytetrafluoroethylene composite coalescence filler for oil-water mixed liquid separation |
| CN110935415B (en) * | 2019-12-10 | 2021-10-15 | 华东理工大学 | Modified polytetrafluoroethylene composite coalescence filler for oil-water mixed liquid separation |
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Application publication date: 20180727 |