CN203507828U - Dielectrophoresis hollow fiber membrane assembly - Google Patents
Dielectrophoresis hollow fiber membrane assembly Download PDFInfo
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- CN203507828U CN203507828U CN201320560240.8U CN201320560240U CN203507828U CN 203507828 U CN203507828 U CN 203507828U CN 201320560240 U CN201320560240 U CN 201320560240U CN 203507828 U CN203507828 U CN 203507828U
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- electrode
- hollow fiber
- dielectrophoresis
- fiber membrane
- hollow
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Abstract
The utility model relates to a dielectrophoresis hollow fiber membrane assembly. Main skeletons and electrode installation plates form a sheet-frame curtain-type structure, the main skeletons are arranged to be one above the other, the electrode installation plates are arranged in the lateral direction, a hollow fiber membrane is vertically installed in the sheet frame formed by the main skeletons and the electrode installation plates, electrodes are fixedly transversely distributed between the sheet frame on the front surface and the rear surface of the hollow fiber membrane at intervals, each main skeleton is provided with a clean water gap, and each electrode installation plate is provided with an electric wire output port and led out to be connected with an external power supply. By adopting the dielectrophoresis technology, the solid and liquid are filtered and separated by the hollow fiber membrane, the pollution of the hollow fiber membrane in the separation of solid-gas and liquid-liquid mixed phase is caused by the existence of solid particles (particles, colloid particles, molten crystals, bacteria, insoluble organism liquid drop and macromolecular organisms) relative to the continuous phase (liquid or gas), since the dielectric polarization capacity of solid particles is different from that of the continuous phase in which the solid particles are suspended, the solid particles are pushed by the dielectrophoresis force to be away from the electrodes or the solid particles are adsorbed onto the electrodes, the membrane pollution and membrane clogging phenomenon in the hollow fiber membrane process can be reduced and even eliminated, and the hollow fiber membrane process can be enhanced.
Description
Technical field
The utility model belongs to separation technology field, relates to heterogeneous (solid-liquid, solid and gas, liquid liquid) hollow-fibre membrane isolated by filtration technique, especially a kind of dielectrophoresis hollow fiber film assembly.
Background technology
Permeable membrane isolation technics is easy to operate due to it in nearly 30 years, process equipment is compact, separative efficiency is high, the separated important process method of low power consumption and other advantages heterogeneous in developing rapidly and becoming industry (mainly in solid-liquid, solid and gas and liquid liquid etc.).Yet in permeable membrane filtering technique, film pollutes this inevitable problem and exists all the time, and become the fatal shortcoming of this technique in practical application.Film pollute be due in film surface and fenestra due to the deposition of particulate, colloidal particle, solute molecule or bacterium, virus etc. or multiply the Pore Blocking causing or diminish, caused the increase of membrane resistance, thereby film transit dose is declined, reduce the consequences such as service life of film.For example, the surpass/microfiltration membranes of often using in Separation of Solid and Liquid, its film transit dose is because film pollution meeting reduces approximately 50% after the work of nearly one hour; And due to absorption and the obstruction of solid granule, this pollution is even not reversible.Separated for liquid liquid with reverse osmosis membrane etc. in nanofiltration, thereby except the gel layer that produces due to concentration polarization can form on film surface one thoroughly layer greatly increased membrane resistance and seen through the requirement of pressure, this film pollutes and can be cleaned and be removed by film, is called reversible membrane fouling.
The molding of doughnut mode starts from 1966 NianDow Chemical companies, and afterwards, the companies such as Du Pont are all used for this kind of mode to commercially produce.Hollow-fibre membrane can be subdivided into hollow fibre filament (hollow fine fibers) and the 500 microns of above capillary hollow-fibre membranes (capillary fibers) of diameter between diameter 50-200 micron conventionally.Compare with other forms of film, hollow-fibre membrane has following outstanding advantages: the packed density of (1) film is large, is generally 1.6x10
4～3x10
4m
2/ m
3; (2) film is self-bearing type, without any supporter, low price; (3) rate of recovery of single film group device is high, is 35%～65% conventionally to the rate of recovery of water.Be widely used in the every field of film separation, in the research work of many film distillations, adopted hollow fibre membrane component.Along with the high speed development of chemical fibre industry, various doughnut technology are rapidly developed, and doughnut membrane technology also constantly promotes.But the antifouling property that hollow-fibre membrane is poor, is still one of key factor limiting its development.
Industrially be used for cleaning the common method that film pollutes and be mainly physical cleaning and Chemical cleaning.Chemical cleaning is use by medicament insoluble pollutant is dissolved and flush out membrane module, yet, Chemical cleaning not only increases the running cost of filtering technique due to the use of medicament, and due to the use of acidity or basic agent, film is caused damage and polluted.Physical cleaning mainly comprises the methods such as the cleaning of low pressure high flow rate, isobaric flushing, backwash, negative pressure cleaning, mechanical curettage, and what in industry, generally use is high speed backwash and air-water backwashing technique.Yet, these two kinds of techniques all must be in cleaning process stopper film filtering technique, and need high pressure and higher than the water of two to three times of aquifer yields for rinsing, and it is high to consume energy, water consumption is large.
Ultrasonic wave is considered to realize a method that prevents that film from polluting.Yet, erosion and the destruction of permeable membrane being caused due to high-strength ultrasonic, and huge ultrasonic wave generation system has hindered it in industrial application.Electron-osmosis film based on principle of electrophoresis in last century the seventies by propositions such as Manegold, and confirm by experiment its feasibility by Henry etc.Yet this method is unsuitable for the industrial condition for polyion complexity, and its high energy consumption has also hindered it in industrial being widely used.In addition, bare electrode the use of electrophoresis also improved short circuit may and the danger of electric shock, and the electrochemical reaction occurring on electrode not only can cause pH value to change, and generates even the chemical by-products of poisonous or contaminated environment.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art part, a kind of dielectrophoresis hollow fiber film assembly is provided, and this assembly can reduce even to be eliminated the film pollution occurring in Middle hollow fiber membrane technique and blocks up film phenomenon to reach strengthening permeable membrane technique.
The purpose of this utility model is achieved through the following technical solutions:
A kind of dielectrophoresis hollow fiber film assembly, comprise main framing, electrode installing plate, hollow-fibre membrane, it is characterized in that: main framing and electrode installing plate form plate and frame structure, the upper and lower setting of main framing, the left and right setting of electrode installing plate, the vertical hollow-fibre membrane of installing between the sheet frame being formed by main framing and electrode installing plate, before and after hollow-fibre membrane, between the sheet frame on two sides, horizontal uniform interval is fixedly mounted with electrode, on main framing, be provided with water purification mouth, electric wire delivery outlet is set on electrode installing plate, draws and connect extraneous power supply.
And described electrode adopts cylindrical interdigital electrode structure, in every pair of installed electrode, an electrode adopts insulating electrode, and another root electrode adopts the bare electrode of anticorrosive.
And described insulating electrode and bare electrode are spaced.
Advantage of the present utility model and good effect are:
1, the utility model is used dielectrophoresis technology, hollow-fibre membrane isolated by filtration solid-liquid, the separated pollution of hollow fiber film that solid and gas or liquid liquid occur in mixing mutually, it is all solia particle (particulate, colloidal particles, solute crystalline solid, bacterium and insoluble organic matter drop and larger molecular organics) with respect to continuous phase (liquid or gas), exist, the dielectric polarization ability of the continuous phase suspending from it due to solia particle different, dielectrophoresis force pushes away electrode by solia particle or solia particle is adsorbed on electrode, reduce and even eliminate the film pollution occurring in doughnut membrane process and block up film phenomenon, to reach strengthening doughnut membrane process.
2, the utility model is when keeping the normal work of doughnut membrane filtration process, need not add additional material for example chemical agent or a large amount of water, can reduce the film even eliminated in doughnut membrane filtration process and pollute and block up the problem that film phenomenon causes film reduces service life and film transit dose declines, reduce and reduce and energy and cost that elimination pollution of hollow fiber film problem consumes.
Thereby 3, the utility model is moved apart hollow-fibre membrane surface and is reached the effect that prevents that film from polluting and blocking up film by being applied to the dielectrophoresis force of the solid particle that closes on doughnut surface, to extend hollow-fibre membrane service life and to improve operating efficiency and the aquifer yield of hollow-fibre membrane.
4, the utility model can reduce the problem of even eliminating film pollution, improve hollow-fibre membrane service life, improve hollow-fibre membrane transit dose, compare with the backwashing technology that industry is often used, the use of dielectrophoresis hollow-fibre membrane is without the work that stops doughnut membrane filtration process.
5, the utility model applies dielectrophoresis by interruption and can eliminate the problem that film pollutes, and energy consumption is low, and running cost is low.
Accompanying drawing explanation
Fig. 1 is structural front view of the present utility model;
Fig. 2 is that the A-A of Fig. 1 is to cross-sectional view;
Fig. 3 is the B portion structure enlarged diagram of Fig. 1;
Fig. 4 is the C portion structure enlarged diagram of Fig. 2;
Fig. 5 is the utility model dielectrophoresis hollow-fibre membrane operation principle schematic diagram.
The specific embodiment
Below by the drawings and specific embodiments, the utility model is described in further detail, but the utility model is not limited to following embodiment, and any change of making in the present embodiment principle or replacement scheme all fall among the claimed scope of the utility model.
A kind of dielectrophoresis hollow fiber film assembly, as Fig. 1, shown in 2, comprise main framing 1, electrode installing plate 5, hollow-fibre membrane 6, for sheet frame curtain formula structure, main framing and electrode installing plate form sheet frame curtain formula structure, on main framing, lower setting, electrode installing plate is left, right setting, main framing and electrode installing plate make by ABS and compression moulding forms one, the vertical hollow-fibre membrane of installing between the sheet frame being formed by main framing and electrode installing plate, before and after hollow-fibre membrane, between the sheet frame on two sides, horizontal uniform interval is fixedly mounted with electrode 2, this electrode adopts cylindrical interdigital electrode structure, two pairs of electrodes are installed in the present embodiment, in every pair of electrode, an electrode adopts insulating electrode, and another root electrode adopts the bare electrode of anticorrosive to reduce energy consumption and electrode production cost, and insulating electrode and bare electrode are spaced.On main framing, be provided with water purification mouth 4, electric wire delivery outlet 3 is set on electrode installing plate, draw and connect extraneous power supply.
The course of work of the present utility model is:
This assembly is soaked in to be needed in waste water to be processed, is arranged on interdigital electrode in the electrode installing port on the electrode installation elements of hollow-fibre membrane both sides by electric wire delivery outlet and power connection.Due to respect to water and lower dielectric polarization ability, solid particle is usually expressed as negative dielectrophoresis character in waste water; In unshapeliness electric field, solid particle is moved to weak electric field direction.As shown in Figure 5, waste water is through the surface of permeable membrane, and the interdigital electrode of installing under permeable membrane provides dielectrophoresis force required unshapeliness electric field.Distinctive circular surface maximizes the forceful electric power scene of interdigital electrode, thereby uses material still less, but can obtain stronger dielectrophoresis force.Hollow-fibre membrane is arranged on the centre of two teams' interdigital electrode, when solid particle is during near hollow-fibre membrane, during first near interdigital electrode, will be moved apart and cannot be near hollow-fibre membrane, and so minimizing is even eliminated film and polluted and block up film and must occur; Water is entered in assembly and is obtained water purification by hollow-fibre membrane, and water purification is discharged by the water purification mouth at main framing two ends.
Dielectrophoresis concept and operation principle thereof that the utility model is related:
Dielectrophoresis (Dielectrophoresis) technology has successfully been applied to, and biomedical industries is next separated, richness is amassed, catch particulate and cell.This technical description be the neutral corpuscle that is positioned at non-well-balanced electric field due to translational motion that the effect of dielectric polarization produces.Be created in dipole moment on particulate can be by two identical carried charges but opposite polarity electric charge represent, when they during mal-distribution, produce a macroscopical dipole moment on particulate interface.When this dipole moment is arranged in unshapeliness electric field, in the difference of the local electric field strength on particulate both sides, produce a clean power, be called dielectrophoresis force.Because the particulate being suspended in medium has different dielectric properties (dielectric constant) from medium; particulate can by or the direction of stronger electric-field intensity move; be called positive dielectrophoresis, or the direction of more weak electric-field intensity moves, be referred to as negative dielectrophoresis.
No matter be at permeable membrane isolated by filtration solid-liquid, the separated permeable membrane that solid and gas or liquid liquid occur in mixing mutually pollutes, and is all solia particle (particulate, colloidal particles, solute crystalline solid, bacterium, and insoluble organic matter drop and larger molecular organics) with respect to continuous phase (liquid or gas), exist.In such a system, the dielectric polarization ability of the continuous phase suspending from it due to solia particle different, dielectrophoresis force pushes away electrode by solia particle or solia particle is adsorbed on electrode, shows or negative dielectrophoresis character or positive dielectrophoresis character.
Due to respect to water and lower dielectric polarization ability, solid particle is usually expressed as negative dielectrophoresis character in waste water; In unshapeliness electric field, solid particle is moved to weak electric field direction.As shown in Figure 1, waste water is through the surface of hollow-fibre membrane, and the interdigital electrode of installing in hollow-fibre membrane both sides provides dielectrophoresis force required unshapeliness electric field.Distinctive circular surface maximizes the forceful electric power scene of interdigital electrode, thereby uses material still less, but can obtain stronger dielectrophoresis force.So hollow-fibre membrane is arranged on to the centre of two teams' interdigital electrode, when solid particle is during near hollow-fibre membrane, during first near interdigital electrode, will be moved apart and cannot be near hollow-fibre membrane.So minimizing is even eliminated film pollution and is blocked up film and must occur.
Dielectrophoresis hollow fiber film assembly is a kind of embodiment of the utility model dielectrophoresis hollow fiber film assembly, adopts sheet frame curtain formula structure, and electrode and electrode installation elements can reuse.
Claims (3)
1. a dielectrophoresis hollow fiber film assembly, comprise main framing, electrode installing plate, hollow-fibre membrane, it is characterized in that: main framing and electrode installing plate form sheet frame curtain formula structure, the upper and lower setting of main framing, the left and right setting of electrode installing plate, the vertical hollow-fibre membrane of installing between the sheet frame being formed by main framing and electrode installing plate, before and after hollow-fibre membrane, between the sheet frame on two sides, horizontal uniform interval is fixedly mounted with electrode, on main framing, be provided with water purification mouth, electric wire delivery outlet is set on electrode installing plate, draws and connect extraneous power supply.
2. dielectrophoresis hollow fiber film assembly according to claim 1, it is characterized in that: described electrode adopts cylindrical interdigital electrode structure, in every pair of installed electrode, an electrode adopts insulating electrode, and another root electrode adopts the bare electrode of anticorrosive.
3. dielectrophoresis hollow fiber film assembly according to claim 2, is characterized in that: described insulating electrode and bare electrode are spaced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320560240.8U CN203507828U (en) | 2013-09-10 | 2013-09-10 | Dielectrophoresis hollow fiber membrane assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320560240.8U CN203507828U (en) | 2013-09-10 | 2013-09-10 | Dielectrophoresis hollow fiber membrane assembly |
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| Publication Number | Publication Date |
|---|---|
| CN203507828U true CN203507828U (en) | 2014-04-02 |
Family
ID=50366813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320560240.8U Withdrawn - After Issue CN203507828U (en) | 2013-09-10 | 2013-09-10 | Dielectrophoresis hollow fiber membrane assembly |
Country Status (1)
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|---|---|
| CN (1) | CN203507828U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103463984A (en) * | 2013-09-10 | 2013-12-25 | 内蒙古天一环境技术有限公司 | Dielectrophoresis hollow fiber membrane assembly |
| CN105502818A (en) * | 2015-12-11 | 2016-04-20 | 凯天环保科技股份有限公司 | Membrane component and MBR (Membrane Biological Reaction) system applying same |
-
2013
- 2013-09-10 CN CN201320560240.8U patent/CN203507828U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103463984A (en) * | 2013-09-10 | 2013-12-25 | 内蒙古天一环境技术有限公司 | Dielectrophoresis hollow fiber membrane assembly |
| CN103463984B (en) * | 2013-09-10 | 2015-05-13 | 内蒙古天一环境技术有限公司 | Dielectrophoresis hollow fiber membrane assembly |
| CN105502818A (en) * | 2015-12-11 | 2016-04-20 | 凯天环保科技股份有限公司 | Membrane component and MBR (Membrane Biological Reaction) system applying same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140402 Effective date of abandoning: 20150513 |
|
| RGAV | Abandon patent right to avoid regrant |