CN102674542A - Charged membrane device for water processing and usage method of device - Google Patents
Charged membrane device for water processing and usage method of device Download PDFInfo
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- CN102674542A CN102674542A CN2012101747198A CN201210174719A CN102674542A CN 102674542 A CN102674542 A CN 102674542A CN 2012101747198 A CN2012101747198 A CN 2012101747198A CN 201210174719 A CN201210174719 A CN 201210174719A CN 102674542 A CN102674542 A CN 102674542A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/33—Wastewater or sewage treatment systems using renewable energies using wind energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention relates to a charged membrane device for water processing. The device comprises a power supply, a membrane group device and a membrane assembly, wherein the membrane group device is groove-shaped, the upper portion and the lower portion of the membrane group device are open and the periphery of the membrane group device is sealed, the membrane assembly is arranged inside the membrane group device, and the outer surface of a hollow fiber membrane wire is coated with a layer of outer tubular supporting layer having a mesh multi-hole structure to form a hollow fiber membrane. When the device is applied in an immersion type membrane separation technology, under the action of current of the power supply, the hollow fiber membrane wire is shielded by the negative electrode of the outer tubular supporting layer, and pollutants with negative electricity can hardly pollute the hollow fiber membrane under the action of electrostatic repulsive force and the flocculation of an electrode dissolution flocculating agent, so that membrane pollution is controlled. The charged membrane device having an anti-pollution function and capable of generating the flocculating agent can control membrane pollution effectively and has the advantages of being high in stain resistance, high in strength of the membrane wire, free of addition of the flocculating agent, capable of purifying water quality, practical and the like.
Description
[technical field]
The present invention relates to be used for the charged membrane device of water treatment.More specifically, the present invention relates to a kind of charged membrane device and method of use thereof that has the antipollution effect and produce flocculation agent certainly, and adopt said device to be applied in the submerged membrane stripping technique.
[background technology]
Membrane bioreactor (Membrane Bio-Reactor; MBR) be that membrane separation technique is combined with the biological degradation principle and a kind of novel sewage treatment process developed; It utilizes membrane separation unit with active sludge in the biochemical reaction tank and larger molecular organics matter effectively catching; Substitute the second pond in the traditional technology, have significant advantages such as contaminant removal efficiency are high, effluent quality is good, stable operation, convenient management, floor space are few, application prospect is very wide.But the film pollution is inevitable in the application process of film.The MBR technical research and application show that membrane pollution problem shortens the work-ing life of film, thereby cause the swabbing pressure increase of pump and the increase of aeration rate to cause the technology operation energy consumption higher, are restriction MBR steady running and limiting factor and the bottleneck problem applied.
Mechanism research and control device about the film pollution; Some patented technologies have all been proposed both at home and abroad, but because the complicacy and the abominable of membrane technique running environment, and the film pollution mechanism still imperfectly understands so far; Control method and technology are still limited, can not get effective solution.
CN 201010259595.4 proposes a kind of antifouling property of weak electric field raising film and method of flux utilized; It is to utilize same sex exclusion principle; Near face, applying weak negative electric field increases the repulsive interaction to these pollutents, and membrane contaminant is pushed away the film surface, therefore has the cake layer of delaying and forms; Increase the film antifouling property, improve flux, prolong the effect of filtering the cycle of operation.This patented technology have energy consumption low, need not to apply advantages such as high field; But do not have flocculation agent in the application process, only depend on electrical forces to reach resistant to pollution effect, and the electric weight of pollutent is lower; Electrical forces a little less than; Membrane technique usually has aeration agitation liquid in application process in addition, and electrostatic force is fluctuateed easily, makes antipollution effect unstable like this.
US 2010/0051542 A1 proposes a kind of Sewage treatment systems and method; This patented technology is the submerged membrane assembly to be put into the inner cathode of tubular electrode circle; Anode can produce ferric flocculant, and the submerged membrane assembly plays anti-pollution under the effect of biochemical degradation, electricity flocculation and membrane filtration, this patented technology can play effluent quality good, support antifilm contaminative effect; But the problem that this technology exists in application process is: use large-area tubular electrode circle that electric field is provided; Make it in film group device, take very big locus, bring very big inconvenience in actual application, can for the dismounting membrane module, be difficult to industriallization.
Can find out by above-mentioned patented technology; The effective means of antifouling property and flux that improves film is: electrostatic field force and flocculation agent acting in conjunction are in the film applied environment; And feasibility with industrial application; This present invention is proposed a kind of charged membrane device that is used for water treatment, and this charged membrane device is the charged membrane device that has the antipollution effect and produce flocculation agent certainly.
[summary of the invention]
[technical problem that will solve]
The purpose of this invention is to provide a kind of charged membrane device that is used for water treatment, this charged membrane device is a kind of charged membrane device that has the antipollution effect and produce flocculation agent certainly.
Another object of the present invention is the method for use that the said charged membrane device that is used for water treatment is applied to the submerged membrane stripping technique.
The another object of the present invention anodic stripping thing that to be the described charged membrane device that is used for water treatment obtain in application process in water treatment as the purposes of flocculation agent and/or water purification agent.
Charged membrane device of the present invention not only can play the effect that controlling diaphragm pollutes, can also spontaneous generation iron, flocculation agent such as aluminium, reach the effect that purifies water outlet, and help the widespread use of membrane separation technique.
[technical scheme]
The present invention realizes through following technical proposals.
The present invention relates to a kind of charged membrane device that is used for water treatment.
This charged membrane device that is used for water treatment comprises power supply 1, MBR membrane cisterna 2, film group device 3 and by the hollow-fibre membrane 5 bonding membrane modules that form 4 of the outer supporting layer of band; Wherein, the film group device 3 that is positioned at MBR membrane cisterna 2 is grooved film group devices of sealing around opening up and down, and membrane module 4 is positioned at film group device 3; The outer supporting layer 6 of mesh structural porous structure tubulose that the hollow-fibre membrane 5 of the outer supporting layer of said band is coated by hollow-fibre membrane silk 7 and its outside surface is formed, and the outer supporting layer 6 of this tubulose is formed through braiding by fiber filament and conductive wire; The cell wall of the anode of said power supply 1 and film group device 3 joins, and its negative electrode and hollow-fibre membrane 5 join.
A preferred embodiment of the invention, the material of the cell wall of film group device 3 are alloy sheets of iron plate, aluminium sheet or the two composition, and rotproofing is not passed through on the surface of above-mentioned sheet material, perhaps allow through suitable rotproofing.
According to another kind of preferred implementation of the present invention, the outer supporting layer 6 of said tubulose is formed by fiber filament and conductive wire braiding, and it is mesh structural porous structure, is coated on the surface of hollow-fibre membrane silk 7.
According to another kind of preferred implementation of the present invention; The outer supporting layer 6 of said tubulose is to be formed through the braiding machine braiding according to following ratio by fiber filament and conductive wire; Conductive wire part by weight in the supporting layer 6 outside tubulose is 0.5-99.5wt%, and surplus is a fiber filament; Fiber filament is with one braided wires when weaving with conductive wire or is different bursts of braided wires.
According to another kind of preferred implementation of the present invention, the fiber filament of the outer supporting layer 6 of said tubulose is one or more fiber filaments in cotton, fiber crops, hair, silk, polypropylene fibre, terylene, continuous synthetic fibre, acrylic fibers, viscose fiber, cellulose acetate, spun glass, the steel fiber.
According to another kind of preferred implementation of the present invention, the conductive wire of the outer supporting layer 6 of said tubulose is one or more conductive wires in iron, aluminium, stainless steel, titanium, platinum, palladium, ruthenium, the iridium metals silk.
According to another kind of preferred implementation of the present invention, the outer supporting layer 6 of described tubulose forms through the high-speed knitter braiding or through the braiding of crochet hook machine.
According to another kind of preferred implementation of the present invention; Described power supply 1 is a direct supply; This direct supply is to convert galvanic constant voltage dc source into by alternating-current, or by sun power, wind energy, water can, the accumulator direct current supply that forms of chemical energy or other Energy conversion; This power supply 1 applies electric field between said anode and negative electrode, the average current density of the outer supporting layer 6 of said tubulose is 0.5 ~ 50mA/cm
2
According to another kind of preferred implementation of the present invention; Said device is applied in the submerged membrane stripping technique, after power supply 1 is connected, and film group device 3 positively chargeds; The hollow-fibre membrane 5 of the outer supporting layer of band is electronegative; Hollow-fibre membrane silk 7 is among the outer supporting layer 6 negative poles shielding of tubulose, and electronegative pollutent is very difficult polluted membrane surface under the throwing out of electrostatic repulsion forces and electrode leachable, thereby controlling diaphragm pollutes.
According to another kind of preferred implementation of the present invention, the anodic stripping thing that the described charged membrane device that is used for water treatment obtains in application process as the purposes of flocculation agent and/or water purification agent, can reach the purpose that purifies water in water treatment.
Principle of the present invention is; Outside surface at hollow-fibre membrane silk 7 has supporting layer 6 outside the tubulose of the mesh structural porous structure of one deck; This supporting layer is formed through the braiding machine braiding by fiber filament and conductive wire, and this supporting layer not only can strengthen the tensile property of hollow-fibre membrane silk 7 but also can be with electric charge; It is membrane module 4 that said film silk is glued according to existing MBR technology, and in the grooved film group device 3 of sealing, cell wall was made up of iron plate or aluminium sheet around the film group device 3 around membrane module 4 was in and opens up and down.Under the effect of direct supply electric current; The outer supporting layer 6 of the tubulose of hollow-fibre membrane silk 7 is electronegative, cell wall positively charged around the film group device 3, and the principal pollutant in the MBR membrane cisterna 2 generally are electronegative; Like this in the process of membrane sepn operation; Pollutent since electrostatic repulsion forces away from the surface of hollow-fibre membrane silk 7, thereby play the effect that controlling diaphragm pollutes, and the film group device cell wall of forming by iron plate and aluminium sheet owing to positively charged and slowly stripping become iron, aluminum ion; Become flocculation agent, further play the effect that controlling diaphragm pollutes.Can pass through the dissolution rate of control current valve regulation iron and aluminum ions, the thickness of adjusting film group device cell wall (iron plate and aluminium sheet), and then the stripping erosion rate of cell wall is within the film group device limit in work-ing life.
Especially; The present invention supports hollow-fibre membrane silk, tubulose outward technology such as enhancement layer, electrochemistry, electricity flocculation dexterously and is applied to one, consequently effects such as reinforcing membrane silk tensile property, the pollution of electrostatic force controlling diaphragm, the pollution of flocculence controlling diaphragm is combined in purpose together.
To achieve these goals; The present invention provides a kind of charged membrane device that is used for water treatment; This charged membrane device is the charged membrane device with antipollution effect, it is characterized in that this device comprise power supply 1, MBR membrane cisterna 2, be positioned at MBR membrane cisterna 2 film group device 3 and by the band outer supporting layer the hollow-fibre membrane 5 bonding membrane modules that form 4; Wherein, said film group device 3 is grooved film group devices of sealing around opening up and down, and membrane module 4 is positioned at film group device 3; The hollow-fibre membrane 5 of the outer supporting layer of said band is that the outer supporting layer 6 of tubulose that the outside surface at hollow-fibre membrane silk 7 is coated with the mesh structural porous structure of one deck forms, and this tubulose supporting layer 6 outward is to be formed through braiding by fiber filament and conductive wire; The cell wall of the anode of said power supply 1 and film group device 3 joins, and its negative electrode and hollow-fibre membrane 5 join.Wherein, the outer supporting layer 6 of tubulose is mesh structural porous structure, is coated on the surface of hollow-fibre membrane silk.This supporting layer not only can strengthen the tensile property of hollow-fibre membrane silk but also can conduct electricity.
In the present invention, used power supply 1 can be a direct supply, comprising constant current direct supply and pulse dc power, also can be AC power, preferably, adopts pulse dc power.Said direct supply can be to convert galvanic constant voltage dc source into by alternating-current, also can be the accumulator direct current supply that is formed by sun power, wind energy, water ability, chemical energy or other Energy conversion.
More preferably, between anode and negative electrode, apply electric field, making the average current density of the outer supporting layer of said tubulose is 0.5 ~ 50mA/cm
2
In the present invention, the outer supporting layer 6 of the tubulose of said mesh structural porous structure is to be understood that to a kind ofly wrapping up, fixing the hollow-fibre membrane silk, strengthens its tensile strength, and liquid is unhinderedly flowed and durable Web materials.It is to be formed through the high-speed knitter braiding according to a certain percentage by fiber filament and conductive wire, and wherein conductive wire part by weight in the supporting layer outside tubulose is 0.5-99.5%, and surplus is a fiber filament.Fiber filament can also can be different bursts of braided wires with conductive wire for same burst of braided wires when weaving.
In the present invention; Fiber filament in the outer supporting layer 6 of tubulose can be natural fiber long filaments such as cotton, fiber crops, hair, silk; Also can be some man-made fiber; Like filament of synthetic fibre such as polypropylene fibre, terylene, continuous synthetic fibre, acrylic fibers, can also be reproducibility fiber filaments such as viscose fiber, cellulose acetate etc., can also be inorganic fibre classes such as spun glass, steel fiber.
The outer supporting layer 6 of tubulose is formed through the high-speed knitter braiding by fiber filament and conductive wire, and the number of spindles of high-speed knitter is 2 ~ 32 ingots, and bipatch is 2 ~ 50mm.
Alternative optimal technical scheme is, the outer supporting layer 6 of tubulose is formed through the braiding of crochet hook machine by fiber filament and conductive wire, and the tubulose knitting density of supporting layer outward is 1 ~ 30 pin order, and the pin number of crochet hook machine is 1 ~ 40 pin.
Described conductive wire can form by various diameters suitable wires is stacked, for example mixes the composite filament that forms by one or more wires in the inert metal silks such as chosen from Fe, aluminium, stainless steel, titanium, platinum, palladium, ruthenium, iridium.The quantity of conductive wire is many more, and the negative electrode area is big more, electrical forces more evenly, strong more.
In the present invention, the kind of hollow-fibre membrane silk 7 is unrestricted, can be the hollow-fibre membrane that materials such as polysulfones, polyethersulfone, pvdf, SE are processed, and also can be ultra-filtration membrane or microfiltration membrane.
In the present invention, in the said membrane module 4, compare with membrane module length, the length surplus capacity of hollow-fibre membrane 5 can not be greater than 15cm, and preferably, should looking the hollow-fibre membrane silk, in dither process, can not to contact film group device be good, its objective is to prevent that the two from causing short circuit.
In the present invention, the material of said film group device 3 cell walls should be iron plate or aluminium sheet or ferroaluminium sheet material, can be antiseptic through too small amount for the surface, also can be do not pass through any antiseptic.Surface anticorrosion will reduce the dissolution rate of anodic stripping thing (flocculation agent), and those skilled in the art as obtaining lower dissolution rate, can carry out suitable rotproofing to sheet material in the specific implementation alternatively.
In addition, the thickness of cell wall iron plate and aluminium sheet should be looked the demand of flocculation agent in the application process and decide, and selected principle is that film group device interior flocculation agent total demand in work-ing life accounts for 1/10 ~ 1/3 of cell wall gross weight.
Device of the present invention is applied in the submerged membrane stripping technique; Behind power connection; Film group device 5 positively chargeds, the hollow-fibre membrane 5 of the outer supporting layer of band is electronegative, and hollow-fibre membrane silk 7 is among the outer supporting layer negative pole shielding of tubulose; Electronegative pollutent is very difficult polluted membrane surface under the throwing out of electrostatic repulsion forces and electrode leachable, thereby reaches the effect that controlling diaphragm pollutes.
The invention still further relates to the resulting anodic stripping thing of charged membrane device that adopts the present invention to have the antipollution effect and produce flocculation agent certainly and in water treatment, can be used as the purposes of flocculation agent and/or water purification agent.The same, repeat no more at this.
[beneficial effect]
Compare with relevant MBR film Pollution control technology, adopt described charged membrane device and be applied to have the following advantages in the submerged membrane stripping technique:
1, stain resistance is strong.Reach the effect that controlling diaphragm pollutes through electrostatic repulsion forces and flocculence double effects, and the action intensity of the two all can be regulated and control its power through the control current size.
2, intensity is high.The composite braided outer supporting layer of tubulose that becomes of fiber filament and conductive wire can strengthen the tensile property of hollow-fibre membrane silk, the tolerance when improving its operation, fracture of wire or the decortication phenomenon avoiding the hollow-fibre membrane silk to be in operation occurring.
3, need not to add flocculation agent.Said charged membrane device can self produce iron or aluminum ion as flocculation agent, purifies water, and institute's produce flocculant can produce instant use immediately, has avoided medicament in the chemical dosing to put for a long time being prone to the storage problem that lost efficacy.
4, practical.Described charged membrane device can be widely used in the submerged membrane stripping technique, and the latticed outer supporting layer of hollow-fibre membrane silk and film group device are as electrode, and electrode area is bigger, is convenient to operational applications, and is practical; Need not extra interpolation equipment, controllability is high.
[description of drawings]
Fig. 1 is the structural representation with charged membrane device of antipollution effect of the present invention;
Fig. 2 is the cross-sectional structure synoptic diagram of charged membrane;
Wherein, 1, power supply; 2, MBR membrane cisterna; 3, film group device; 4, membrane module; 5, the hollow-fibre membrane of the outer supporting layer of band; 6, the outer supporting layer of tubulose porous; 7, hollow-fibre membrane.
Fig. 3 is the running condition of hollow-fibre membrane under three kinds of charged situation of the outer supporting layer of band;
Fig. 4 is the running condition of the slot type film group device of charged membrane device when being unlike material.
[embodiment]
Following embodiment combines accompanying drawing that the present invention is described without limitation.
In the present invention; The ferro element total content of ferron or the measuring method of the phosphate concentration in the solution are to write according to State Environmental Protection Administration's water and effluent monitoring analytical procedure editorial committee; " water and effluent monitoring analytical procedure " (the 4th edition; [), measuring method of stipulating in China Environmental Science Press's publication (2002) carries out assay determination.
Embodiment 1
As shown in Figure 3, a kind of charged membrane device that has the antipollution effect and produce flocculation agent certainly mainly is made up of power supply 1, MBR membrane cisterna 2, film group device 3, membrane module 4 parts.Present embodiment adopts the direct supply of 0-35V, and continuous current density is 10A/m
2, the wall of film group device is the iron plate of thickness 5mm, and the outer supporting layer of tubulose is formed through crocheting by polypropylene filament yarn and fine copper silk, and wherein fine copper silk part by weight in the supporting layer outside tubulose is 2%, and surplus is a polypropylene filament yarn.The knitting density of crocheting layer is 20 pin orders, and the pin number of crochet hook machine is 10 pins.Be applied in the microfiltration membrane, promptly in the MBR technology, the operational conditions of membrane cisterna is that sludge concentration is 7000mg/L, and aeration rate is 90m
3/ m
2* h, the area of membrane module is 5m
2, effluent flux is 25L/m
2* h.Being employed in outer the support on the tunic does not respectively apply electric current, applies positive electricity, applies under three kinds of situation such as negative electricity the running condition of observing membrane module.
Contrast and experiment can be found: outside the tubulose of hollow-fibre membrane silk, be with negative electricity can obviously alleviate the operating pollution condition of membrane module on the supporting layer, membrane module surface contamination situation is under three kinds of situation: electronegative membrane module>charged membrane assembly not>the positively charged membrane module.It is thus clear that the described charged membrane device that has the antipollution effect and produce flocculation agent certainly is applied among the MBR, can significantly play resistant to pollution effect.
Embodiment 2
As shown in Figure 4, a kind of charged membrane device that has the antipollution effect and produce flocculation agent certainly mainly is made up of power supply 1, MBR membrane cisterna 2, film group device 3, membrane module 4 parts.Present embodiment adopts the direct supply of 0-35V, and continuous current density is 5A/m
2, the outer supporting layer of tubulose is that the high-speed knitter that passes through by polyester filament and copper wire weaves and forms, and wherein fine copper silk part by weight in the supporting layer outside tubulose is 2%, and surplus is a polyester filament.The number of spindles of high-speed knitter is 8 ingots, and bipatch is 25mm.Be applied in the microfiltration membrane, promptly in the MBR technology, the operational conditions of membrane cisterna is that sludge concentration is 7000mg/L, and aeration rate is 90m
3/ m
2* h, the area of membrane module is 5m
2, effluent flux is 25L/m
2* h.Film group device adopts iron plate and stainless steel plate respectively, and wall thickness is 5mm, is employed in outer the support on the tunic respectively and applies negative electricity, under different film group device cell wall situation, observes the running condition of membrane module and the water quality situation of Inlet and outlet water.
Contrast and experiment can be found: membrane module surface contamination situation is under two kinds of situation: the running condition of iron plate film group device obviously is better than the stainless steel film group device.Simultaneously, the water-quality guideline analytical results of mensuration water inlet and water outlet is shown in table 1.
Table 1: water inlet and effluent quality analytical results
| Water-quality guideline | Influent concentration (mg/L) | Go out water concentration (mg/L) | Clearance (%) |
| COD | 90.3 | 18.6 | 79.40 |
| Nitrate nitrogen | 15.8 | 2.2 | 86.08 |
| Ammonia nitrogen | 5.6 | 1.5 | 73.21 |
| Total phosphorus | 2.4 | 0.18 | 92.50 |
Shown in table 1 result, the water inlet of sewage work is behind charged membrane device of the present invention, and under the situation of not extra interpolation flocculation agent, the nitrogen in the water outlet, phosphorus and COD have obviously reduced a lot, have reached discharging standards.Simultaneously, measure the content of iron in the membrane cisterna mixed solution, the result shows that iron level is 30mg/L in the iron plate film group device, and the flocculating effect of mixed solution is better; Iron level is 0 in the stainless steel film group device, and mixed solution does not almost have flocculating effect.This shows the iron that charged membrane device of the present invention produced, the content demand that aluminium class flocculation agent can reach water purifying flocculating agent.
This shows that the described charged membrane device that has the antipollution effect and produce flocculation agent certainly is applied among the MBR, can significantly play antipollution and the effect that purifies water.Its reason is electronegative pollutent very difficult polluted membrane surface under the throwing out of electrostatic repulsion forces and electrode leachable, and flocculation sediment purifies water simultaneously, i.e. the two acting in conjunction can obtain the good preventing membrane pollution and the technique effect of water treatment simultaneously.
Claims (10)
1. charged membrane device that is used for water treatment is characterized in that this device comprises power supply (1), MBR membrane cisterna (2), film group device (3) and by the bonding membrane module that forms of hollow-fibre membrane (5) (4) of the outer supporting layer of band; Wherein, the film group device (3) that is positioned at MBR membrane cisterna (2) is the grooved film group device of sealing around opening up and down, and membrane module (4) is positioned at film group device (3); The outer supporting layer (6) of mesh structural porous structure tubulose that the hollow-fibre membrane (5) of the outer supporting layer of said band is coated by hollow-fibre membrane silk (7) and its outside surface is formed, and the outer supporting layer (6) of this tubulose is formed through braiding by fiber filament and conductive wire; The cell wall of the anode of said power supply (1) and film group device (3) joins, and its negative electrode and hollow-fibre membrane (5) join.
2. the charged membrane device that is used for water treatment according to claim 1, the material that it is characterized in that the cell wall of film group device (3) is the alloy sheets of iron plate, aluminium sheet or the two composition, rotproofing is not passed through on the surface of above-mentioned sheet material.
3. the charged membrane device that is used for water treatment according to claim 2; It is characterized in that the outer supporting layer (6) of said tubulose is formed by fiber filament and conductive wire braiding; It is mesh structural porous structure, is coated on the outside surface of hollow-fibre membrane silk (7).
4. the charged membrane device that is used for water treatment according to claim 3; It is characterized in that the outer supporting layer (6) of said tubulose is formed through the braiding machine braiding according to following ratio by fiber filament and conductive wire; Conductive wire part by weight in the supporting layer (6) outside tubulose is 0.5-99.5wt%, and surplus is a fiber filament; Fiber filament is with one braided wires when weaving with conductive wire or is different bursts of braided wires.
5. according to claim 3 or the 4 described charged membrane devices that are used for water treatment, it is characterized in that the fiber filament of the outer supporting layer (6) of said tubulose is one or more fiber filaments in cotton, fiber crops, hair, silk, polypropylene fibre, terylene, continuous synthetic fibre, acrylic fibers, polypropylene fibre, viscose fiber, cellulose acetate, spun glass, the steel fiber.
6. according to claim 3 or the 4 described charged membrane devices that are used for water treatment, it is characterized in that the conductive wire of the outer supporting layer (6) of described tubulose is one or more conductive wires in iron, aluminium, stainless steel, titanium, platinum, palladium, ruthenium, the iridium metals silk.
7. the charged membrane device that is used for water treatment according to claim 1 is characterized in that the outer supporting layer (6) of described tubulose forms through the high-speed knitter braiding or through the braiding of crochet hook machine.
8. the charged membrane device that is used for water treatment according to claim 1; It is characterized in that described power supply (1) is a direct supply; This direct supply is to convert galvanic constant voltage dc source into by alternating-current, or by sun power, wind energy, water can, the accumulator direct current supply that forms of chemical energy or other Energy conversion; This power supply (1) applies electric field between said anode and negative electrode, the average current density of the outer supporting layer (6) of said tubulose is 0.5 ~ 50mA/cm
2
9. the charged membrane device that is used for water treatment according to claim 1; It is characterized in that said device is applied in the submerged membrane stripping technique, after power supply (1) is connected, film group device (3) positively charged; The hollow-fibre membrane (5) of the outer supporting layer of band is electronegative; Hollow-fibre membrane silk (7) is among outer supporting layer (6) the negative pole shielding of tubulose, and electronegative pollutent is very difficult polluted membrane surface under the throwing out of electrostatic repulsion forces and electrode leachable, thereby controlling diaphragm pollutes.
10. the charged membrane device that is used for water treatment according to claim 1 is characterized in that anodic stripping thing that this charged membrane device the obtains purposes as flocculation agent and/or water purification agent in water treatment in application process.
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| WO2015137878A1 (en) * | 2014-03-12 | 2015-09-17 | Agency For Science, Technology And Research | Filter devices and filtering methods |
| CN105271615A (en) * | 2015-10-29 | 2016-01-27 | 长江大学 | Electrochemical composite membrane bioreactor |
| CN105836879A (en) * | 2016-04-11 | 2016-08-10 | 同济大学 | An anaerobic electrically-conductive ceramic membrane biological reacting device effectively controlling membrane pollution and a method |
| CN107589186A (en) * | 2017-08-30 | 2018-01-16 | 浙江清华长三角研究院 | One kind power-up membrane extraction device and its application method |
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