CN205627656U - Efficiency of electrodialysis is improved gather electric field membrane electrodialysis device - Google Patents

Efficiency of electrodialysis is improved gather electric field membrane electrodialysis device Download PDF

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Publication number
CN205627656U
CN205627656U CN201521137244.0U CN201521137244U CN205627656U CN 205627656 U CN205627656 U CN 205627656U CN 201521137244 U CN201521137244 U CN 201521137244U CN 205627656 U CN205627656 U CN 205627656U
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China
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membrane
electrodialysis
electric
utmost point
cask
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Expired - Fee Related
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CN201521137244.0U
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Chinese (zh)
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皮大能
齐海兵
鄢自华
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皮大能
齐海兵
鄢自华
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Abstract

The utility model discloses an efficiency of electrodialysis is improved gather electric field membrane electrodialysis device, include: the ferroelectric utmost point of cask shape, the central ferroelectric utmost point, pass through membrane, apopore, liquid storage tank, mudhole, be provided with the ferroelectric utmost point of cask shape and the central ferroelectric utmost point on the liquid storage tank, the center is ferroelectric to be provided with the membrane on extremely, and the apopore is installed on the top of liquid storage tank. The utility model discloses do not carrying under the electrode voltage prerequisite, thereby increase membrane present position electric field strength improves the electric charge amount's of membrane method to the center ferroelectric very central, appear the ferroelectric utmost point and membrane cover with the cask and dress up coaxial cask, form the even strong electric field of non -, at the height of confirming the membrane bucket and diameter, cask outer wall apart from the condition of distance between the ferroelectric utmost point inner wall under, according to the cask ferroelectric utmost point surface area / membrane bucket surface area >= 10 that appears, the inner structure who is gathered electric field membrane electrodialysis device. The utility model provides high dialysis efficiency, the power line cross -section is more and more littleer, and the area of corresponding membrane can reduce in proper order, has practiced thrift the membrane quantity.

Description

A kind of poly-electric field EDBM device improving electrodialysis efficiency
Technical field
This utility model belongs to electrodialytic technique field, particularly relates to a kind of poly-electric field improving electrodialysis efficiency EDBM device.
Background technology
Electroosmose process (electrodialysis, ED) is widely used in chemical industry, light industry, metallurgy, papermaking, sea The fields such as water desalination, environmental conservation;The most more it is applied to the biologies such as aminoacid, protein, serum The purification of goods and research.It mainly utilizes applying direct current electric field to make anions and canons in solution move generation electricity Stream, cation exchange membrane (anode membrane) and anion exchange membrane (cavity block) selectivity respectively pass through positive and negative from Son, it is achieved solute separates with solution.In electrodialytic process, extra electric field is wished by improving DC electric field Quickening ion is to corresponding film migration velocity, but when electric field increases to a certain degree, makes large quantity of moisture ionize Polarization generates H+、OH-Ion, the OH that dissociation in water goes out-Ion permeable cavity block, makes cavity block dense hydroecium side PH value rises, H simultaneously+Ion is enriched with on the face of anode membrane dense hydroecium side.As Ca in water2+And Mg2+ In the presence of, cavity block produces polarization tie dirt and invests film surface, increase membrane resistance, result in extra electricity Can consume, even reduce the effective area of film, shorten the normal service life of film.Therefore electrodialytic process is deposited In the energy consumption optimal choice problem of speed Yu extra electric field, in general the optimum energy consumption of electrodialytic process is corresponding Optimum current density (size of current in unit are) i.e. limiting current density.At present, conventional reduction energy The major measure of consumption includes: 1. control below carrying current by operation electric current, it is to avoid need after polarization tie dirt Periodically switch electrode or pickling.Discharge fouling and the gas of room, pole the most as early as possible, develop and use selectivity good The ion exchange membrane little with electrolyte diffusion value improves dividing plate net materials and version.3. close in power consumption In the case of reason, suitable thinning block board thickness, improves the mechanical condition of solution.The pressure of room the denseest, light should Keep in balance;Pay attention to the pretreatment of former aqueous solution;Prevent equipment leakage etc..Additionally also have former aqueous solution Preheating, because along with the rising of temperature, water resistance can reduce, and so can drop low operating voltage, significantly drop Low power consumption.From principle, (body is straight by the extra electric field of electrodialyzer for the power consumption of electrodialyzer Stream) power consumption and the power consumption sum overcoming water to lose through electrodialyzer, according to Ohm's law, can be by The running voltage of electrodialyzer is decomposed into following components: U=EDJ+EMO+IRJC+IRMO+IRSH (1) E in formulaDJFor the voltage needed for electrode reaction;EMOFor overcoming the voltage needed for transmembrane potential;I is electric osmose The operating current of parser;RJCFor contact resistance;RMOFor membrane resistance;RSHFor water resistance.General work electricity The pressure U nearly hectovolt of needs, and EDJIt is typically only a few volt.Due to film both sides concentration difference produce transmembrane potential with Applied voltage is contrary, every pair of transmembrane potential EMOIt is about a few volt of zero point.Overcome the voltage consumption required for resistance, I.e. IRJC、IRMOWith IRSHSum accounts for 60~70% that total voltage consumes.The most above-mentioned conventional reduction energy consumption side The cardinal principle of method is desirable to improve the performance of film, makes by reducing contact resistance, membrane resistance and water resistance etc. Become voltage thus reduce power consumption.But after the performance of film improves, it is desirable to by high-voltage direct-current electricity When the electrodialysis plant that source powers improves dialysis rates, electrode voltage EDJIncrease, the power consumption of electrode reaction Will improve accordingly.And for the electrodialysis plant that low-voltage dc power supply is powered, how to accelerate ion Migrate to corresponding film and improve the problem that dialysis rates is also significant.
In a word, in external dc power supply one timing, how to improve dialysis efficiency by raising dialysis rates is One of problem that all electrodialysis plants all have to consider.
Utility model content
The purpose of this utility model is to provide a kind of poly-electric field EDBM device improving electrodialysis efficiency, Aim to provide the shape by changing electrode and position thus increase the electric field intensity at film, improve dialysis efficiency Electrodialysis methods.
This utility model is achieved in that a kind of poly-electric field EDBM device improving electrodialysis efficiency, Described poly-electric field EDBM device includes: drum-shaped iron electrode, center iron electrode, film, apopore, storage Liquid pool, mudhole;
It is provided with drum-shaped iron electrode and center iron electrode on liquid storage tank, center iron electrode is provided with film, film Bottom have mudhole, mudhole is provided with apopore also cross the bottom of liquid storage tank, the top of liquid storage tank.
Another object of the present utility model is to provide a kind of poly-electric field film applying described raising electrodialysis efficiency The inoranic membrane electrodialysis plant of electrodialysis plant.
Another object of the present utility model is to provide a kind of poly-electric field film applying described raising electrodialysis efficiency The organic membrane electrodialysis plant that electrodialysis manufactures.
Another object of the present utility model is to provide a kind of poly-electric field film applying described raising electrodialysis efficiency The hybridized film electrodialysis plant that electrodialysis is this.
Another object of the present utility model is to provide a kind of poly-electric field film applying described raising electrodialysis efficiency The homogeneous membrane electrodialysis plant of electrodialysis symptom.
Another object of the present utility model is to provide the poly-electric field film electric osmose of a kind of described raising electrodialysis efficiency The heterogeneous membrane electrodialysis plant of analysis apparatus.
The poly-electric field EDBM device improving electrodialysis efficiency that this utility model provides, the circle of voltage constant In the non-uniform electric field of arc, electric field intensity is increasingly stronger, accelerates ion to corresponding film migration velocity, raising Dialysis efficiency;Meanwhile, electric lines of force cross section is more and more less, and therefore the area of corresponding membrane can be sequentially reduced, Save film consumption.Improving speed, raising processes standard, reduces production cost.
Accompanying drawing explanation
Fig. 1 is the poly-electric field membrane electrodialysis process stream improving electrodialysis efficiency that this utility model embodiment provides Cheng Tu.
Fig. 2 is the poly-electric field EDBM device knot improving electrodialysis efficiency that this utility model embodiment provides Structure schematic diagram;
In figure: 1, drum-shaped iron electrode;2, center iron electrode;3, drum-shaped film;4, apopore;5、 Liquid storage tank;6, mudhole.
Fig. 3 is that the poly-electric field membrane electrodialysis process improving electrodialysis efficiency that this utility model embodiment provides is former Reason schematic diagram.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with enforcement Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein Only in order to explain this utility model, it is not used to limit this utility model.
Below in conjunction with the accompanying drawings application principle of the present utility model is explained in detail.
As it is shown in figure 1, the poly-electric field membrane electrodialysis process improving electrodialysis efficiency of this utility model embodiment Comprise the following steps:
S101: dress up coaxial drum centered by the iron electrode of center, by drum-shaped iron electrode and Membrane cover, is formed Non-uniform electric field;
S102: determining height and diameter, the situation of the outer wall of barrel spacing away from iron electrode inwall of film bucket Under, according to drum-shaped iron electrode surface area/film bucket surface area >=10, obtain the inside of poly-electric field EDBM device Structure.
As in figure 2 it is shown, the poly-electric field EDBM device improving electrodialysis efficiency of this utility model embodiment Specifically include that drum-shaped iron electrode 1, center iron electrode 2, drum-shaped film 3, apopore 4, liquid storage tank 5, Mudhole 6.
It is provided with drum-shaped iron electrode 1 on liquid storage tank 5 and connects power cathode and center iron electrode 2 connects positive source, Being provided with film 3 in center iron electrode 2, the top of liquid storage tank 5 is provided with apopore 4, and row is arranged at the bottom of film 3 Dirty hole 6, mudhole 6 is also cross the bottom of liquid storage tank 5.
Below in conjunction with the accompanying drawings operation principle of the present utility model is described in detail.
As it is shown on figure 3, drum-shaped iron electrode surface area/film bucket surface area=10, in outer span drum-shaped iron electrode L centimetre of wall.
Also calculating with the outer liquid level difference of mensuration film inner membrance, before work, the outer liquid level of film inner membrance is at same water In plane.In energising caudacoria, liquid level can slowly decline, and keeps constant when arriving minimum point.It is by electric field force The permeability selectivity of film causes jointly.The corresponding different electric field intensity of different difference in height, different from Sub-drift speed, ion drift number.Ion drift number is divided by cation concentration percentage ratio in permeable membrane, Jiu get Li Opinion flow.For the process of general sanitary sewage, during work, stock solution enters from positive electrode region, after film, The water reaching discharging standards exactly is flowed out from negative pole.Drum-shaped iron electrode and long-pending/film bucket surface area=10 are examinations Test the ratio determined.During actual application, this ratio also can be the biggest.
When needing that single assembly is combined into series connection group in actual applications, the principle that should follow is: allows and waits to locate Reason liquid always flows into from positive polar region, flows out from negative pole district, because in aqueous, and the drift of hydrogen ion Speed is more than 5 times of other any ion drift speed.Allow pending liquid enter from positive polar region, flow from negative pole district Go out, just can obtain promoting of convergent field power and accelerate to separate with other ions, accelerate water and process.
The process of sewage seriously polluted for heavy metal ion, arsenic oxide arsenoxide etc., can use this device of many sets to enter The mode of row plural serial stage solves.This device with concrete connection of next device is: second dress The electrode put is positive and negative contrary with first, and central electrode is penalized negative, is just outward;First solution flowed out enters The positive polar region of second, the both positive and negative polarity of the 3rd device and first identical;The solution that second device flows out Enter the positive polar region at the 3rd device center, connect and start the cycle over until emission compliance.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, All any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, all should Within being included in protection domain of the present utility model.

Claims (1)

1. the poly-electric field EDBM device improving electrodialysis efficiency, it is characterised in that the poly-electric field EDBM device of described raising electrodialysis efficiency includes: drum-shaped iron electrode, center iron electrode, film, apopore, liquid storage tank, mudhole;
Drum-shaped iron electrode and center iron electrode it is provided with on described liquid storage tank, drum-shaped iron electrode connects the negative pole of power supply, center iron electrode connects the positive pole of power supply, it is provided with permeable membrane in the iron electrode of center, the bottom of permeable membrane is provided with mudhole, mudhole is through the bottom of liquid storage tank, and the top of liquid storage tank is provided with apopore.
CN201521137244.0U 2015-12-31 2015-12-31 Efficiency of electrodialysis is improved gather electric field membrane electrodialysis device Expired - Fee Related CN205627656U (en)

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CN201521137244.0U CN205627656U (en) 2015-12-31 2015-12-31 Efficiency of electrodialysis is improved gather electric field membrane electrodialysis device

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Application Number Priority Date Filing Date Title
CN201521137244.0U CN205627656U (en) 2015-12-31 2015-12-31 Efficiency of electrodialysis is improved gather electric field membrane electrodialysis device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105642122A (en) * 2016-01-05 2016-06-08 皮大能 Poly-electric field membrane electrodialysis method and device capable of improving electroosmosis efficiency

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105642122A (en) * 2016-01-05 2016-06-08 皮大能 Poly-electric field membrane electrodialysis method and device capable of improving electroosmosis efficiency

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Granted publication date: 20161012

Termination date: 20171231