CN104591352A - Electrodialysis electrode plate for treating high-concentration brine, electrodialysis device and using method of electrodialysis device - Google Patents
Electrodialysis electrode plate for treating high-concentration brine, electrodialysis device and using method of electrodialysis device Download PDFInfo
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- CN104591352A CN104591352A CN201410855405.3A CN201410855405A CN104591352A CN 104591352 A CN104591352 A CN 104591352A CN 201410855405 A CN201410855405 A CN 201410855405A CN 104591352 A CN104591352 A CN 104591352A
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
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Abstract
The invention relates to an electrodialysis electrode plate for treating high-concentration brine, wherein one side of the electrodialysis electrode plate is a baffled curved surface; the invention also provides an electrodialysis device adopting the electrodialysis electrode plate for treating the high-concentration brine, and an electrodialysis treatment method. The electrodialysis electrode plate is large in current density and high in anti-pollution capacity; the electrodialysis device is long in service life.
Description
Technical field
The invention belongs to water-treatment technology field, relate to a kind of improvement of electrodialytic desalting device pole plate, more specifically by the mode of special pole plate curved surface deflector type arrangement, thus the dirt improving graticule mesh is blocked up, strengthens contamination resistance, is improved electrodialytic ratio of desalinization.
Background technology
Along with the improvement to conventional electrodialysis process, make the popular research field that electrodialytic technique becomes new.Electrodialysis is as a kind of membrane separation technique, and it is under the effect of DC electric field, is impellent, utilizes the selective penetrated property of ion-exchange membrane with potential difference.Salinity in ionogen is separated from solution, thus realizes the object of the concentrated, refining of product or purifying.Electrodialytic electrode is located at membrane stack both sides, adopts direct supply as the impellent of electrodialytic desalting.Electrode is one of major parts of electrodialyzer, and it directly affects electrodialytic result of use and desalting efficiency.
In electrodialysis, electrode generally has good chemical stability and electrochemical stability in selection, good machinery and processing characteristics.In electrodialytic operational process, the resistance of reaction current, except from except resistance, solution resistance, is also subject to the polarization resistance from electrode reaction.Prior art obtains larger reaction current for Ti-Ru electrode formation tabular, column or reticulated structure by conventional and analyse oxygen, electrode that hydrogen-evolution overpotential is little.Fenestral fabric can reduce the use of precious metal, uses more in industrialization.
Obtaining after general water treatment can the fresh water of reuse and the sewage of discharge, and the sewage height salt of discharge is high hard, cannot use, cause environmental pressure, how reduce the quantity discharged of sewage, obtain the target that higher fresh water reclamation rate is water treatment field always.
But in through engineering approaches operation at present, several battery lead plate all also exists some problems, is analyzed as follows:
Parallel plane electrode plate: because battery lead plate is plate-like, cause electrode sheet material to waste; Battery lead plate is that plane causes current density little, and current utilization rate is low, is just eliminated gradually;
Parallel roundlet column type battery lead plate: because cylinder defines negative and positive two sides in the process of arrangement, the battery lead plate of the back is substantially inoperative in the process of desalination, and cause current utilization rate low, current density is little, cannot be used for the process of high strong brine;
Grid electrode plate: it is more that current grid electrode plate mostly is diamond array, can cause negative and positive two sides equally, reduces the utilization ratio of electric current; When processing high strong brine, easily block grid, affect powering up of demineralising process, and easily cause battery lead plate to burn out.
Therefore, a kind of novel electrode for electrodialysis battery lead plate is urgently developed in this area, and it has higher current density, contamination resistance is strong.When for the treatment of high strong brine, performance is excellent.
Summary of the invention
The current density existed for existing electrodialysis electrode plate structure is little, utilization rate of electrical is low, for the problem of high strong brine poor processing effect, one of the object of the invention is to provide a kind of electrode for electrodialysis plate for the treatment of high strong brine, described battery lead plate is creationary is set to deflector type curved surface by electrode for electrodialysis plate one side, solve the dirt of grid electrode expanded metals lattice stifled, utilization rate of electrical is low, the problem that desalting efficiency is low, obtain larger current density, higher utilization rate of electrical, and good high strong brine treatment effect.
Electrode for electrodialysis plate of the present invention is deflector type curved surface, and namely described curved surface has at least 2 troughs.
The current density of electrodialysis pole plate provided by the invention is large, and contamination resistance is strong.
Two of object of the present invention is to provide a kind of electrodialysis unit, described electrodialysis unit applies the described battery lead plate of one of object, the curved surface of battery lead plate is installed towards the one side of membrane stack, solve the dirt of grid electrode expanded metals lattice stifled, utilization rate of electrical is low, the problem that desalting efficiency is low, obtains larger current density, higher utilization rate of electrical, and good high strong brine treatment effect; In addition, the long service life of electrodialysis unit provided by the invention.
Particularly, the present invention is achieved through the following technical solutions:
A kind of electrodialysis unit, containing at least one electrodialysis cell; With the gripping unit for described at least one electrodialysis cell clamping being linked to be entirety; Wherein, described electrodialysis cell comprises two electrode plate assemblies and the membrane stack between two electrode plate assemblies, described electrode plate assembly is made up of insulcrete and the battery lead plate embedded in insulcrete, the electrode for electrodialysis plate for the treatment of high strong brine described one of for the purpose of described battery lead plate, the curved surface of described battery lead plate is towards membrane stack side.
The action principle of the electrodialysis unit that the application provides can do following understanding:
1. deflector type curved surface adds the current density of battery lead plate:
Provided by the invention is the battery lead plate of deflector type curved surface towards membrane stack one side, adds the curvature of battery lead plate, adds the battery lead plate length in unit surface, enhance the current density of unit surface on battery lead plate.When the curvature of curved surface presents semicircle, the useful length of unit surface can increase by 1.57 times, greatly increases current density, improves the desalting effect of high strong brine.
2. deflector type curved surface changes field strength distribution:
The difference of battery lead plate curvature of curved surface, causes the small different field intensity occurring alternation; Under the electric microfield alternating action of alternation, the Working environment of ion-exchange membrane is activated, and electrodialytic desalting efficiency improves; On the other hand, under the electric microfield alternating action of alternation, microbic activity is by wider change, and growth cycle extends, and the dirt reducing microorganism is blocked up.
3. deflector type curved surface changes water (flow) direction:
For the plane electrode plate of prior art, current present the flowing of single direction; And the application is by being set to deflector type curved surface by battery lead plate, changing the state of current on battery lead plate, forming the ceaselessly disturbance of electrode plate surface current moment, form flow-disturbing, greatly reduce the scale problems of electrode plate surface; On the other hand, flow-disturbing has driven the flowing of the tiny flocculation body of electrode plate surface to a great extent, removes the flco on surface and a large amount of microorganisms, is difficult in electrode plate surface fouling, and the dirt reducing microorganism and dirt is blocked up.
In general, being arranged through of battery lead plate deflector type curved surface changes curature variation current density, improves the utilization ratio of electric energy; By changing curature variation field intensity, improve Working environment and the microbic activity of ion-exchange membrane, improve the contamination resistance of electrodialysis unit; By changing curature variation water (flow) direction, producing flow-disturbing, decreasing dirty stifled, souring being played to battery lead plate, improves the work-ing life of electrodialytic membranes.
Battery lead plate of the present invention and insulcrete closely cooperate, to prevent the process water of electrodialysis unit through electrode plate assembly.
The close-fitting mode of the present invention to battery lead plate and insulcrete is not specifically limited, and those skilled in the art can select according to practical situation, prevents electrodialysis unit process water all to can be used for the present invention through the mode of electrode plate assembly as long as can reach.
Preferably, described battery lead plate edge welds completely with insulcrete.
On battery lead plate of the present invention towards membrane stack one side be deflector type curved surface.
Preferably, electrode plate surface of the present invention is coated with noble metal composite-material;
Preferably, described precious metal material be selected from ruthenium, according to or rhodium in the alloy of any a kind or at least 2 kinds.
Noble metal composite-material is the corrosion-resistant and good material of chemical property as one, is used widely in electrodialysis use procedure.
Battery lead plate of the present invention connects power supply, and described power supply is direct supply.
TDS >=the 10000mg/L of high strong brine of the present invention.
Present invention also offers a kind of electrodialysis process method of high strong brine desalination, described electrodialysis process method adopts aforementioned electrodialysis unit to carry out.
Electrodialysis unit of the present invention can be used in all sewage, is preferred for the high strong brine of TDS >=10000mg/L.The present invention does not limit for the source of high strong brine, can be to produce direct draining, also can be the dense water of production draining after process section process.So-called dense water refers to the high strong brine entering environment after water treatment, corresponding with the fresh water recycled.
The electrodialysis process method of high strong brine desalination of the present invention comprises the steps:
(1) by high strong brine through secondary filter process, removing large particulate matter, water 1 must be produced;
(2) product water 1 is passed into the described electrodialysis unit of one of object, switch on power afterwards, regulate operating parameter, carry out electrodialysis process, water 2 must be produced.
Preferably, pass in electrodialysis unit and produce water 1 at least after 15s, switch on power.
Compared with prior art, the present invention has following beneficial effect:
(1) battery lead plate battery lead plate is designed to deflector type curved surface towards membrane stack one side, considerably increases the useful length of unit surface electric pole plate, add current density, improve electrodialytic usefulness; Curved surface defines alternation field intensity on battery lead plate, have activated the activity of ion-exchange membrane, and microbic activity is by wider change, and growth cycle extends, and the dirt reducing microorganism is blocked up; Deflector type curved surface also creates flow-disturbing on battery lead plate, removes the flco on surface and a large amount of microorganisms, adds the life-span of electrodialysis unit;
(2) utilize deflector type curved surface electrode plate provided by the invention to carry out electrodialysis process, make utilization rate of electrical high, processing efficiency is high, especially carries out electrodialysis process to high strong brine, and contamination resistance strengthens, desalting effect improves.
Accompanying drawing explanation
Fig. 1 is the structural representation of battery lead plate provided by the invention.
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art should understand, described embodiment is only help to understand the present invention, should not be considered as concrete restriction of the present invention.
Adopt the electrodialysis unit for the treatment of the electrode for electrodialysis plate of high strong brine, described device contains at least one electrodialysis cell; With the gripping unit for described at least one electrodialysis cell clamping being linked to be entirety; Wherein, described electrodialysis cell comprises two electrode plate assemblies and the membrane stack between two electrode plate assemblies, and described electrode plate assembly is made up of insulcrete and the battery lead plate embedded in insulcrete, on described battery lead plate towards membrane stack one side be deflector type curved surface.Shown in the structure iron 1 of described battery lead plate (Fig. 1 is the structural representation of battery lead plate).
Described battery lead plate and insulcrete closely cooperate, to prevent the process water of electrodialysis unit through battery lead plate; Preferred described battery lead plate edge welds completely with insulcrete;
Described battery lead plate connects power supply, and described power supply is direct supply.
Embodiment
A treatment process for high strong brine, described high strong brine can be produce direct draining, also can be the dense water of production draining after process section process.So-called dense water refers to the dense haline water of height entering environment after water treatment, corresponding with the fresh water recycled.
Described method specifically comprises the steps:
(1) by high strong brine through secondary filter, removing large particulate matter, obtain the water inlet of device;
(2) through topping-up pump, water inlet lifting is entered aforesaid electrodialysis unit, switch on power afterwards, regulate electric current and voltage, carry out electrodialytic desalting process, obtain fresh water and dense water, sampling in every 12 hours detects water inlet, fresh water and dense water, and test result is in table 1;
(3) fresh water is passed into desalter desalination, obtain recycle-water, the Water Sproading rate of water treatment is in table 2.
Every 12 hours of table 1 detects the water quality situation of water inlet, dense water and fresh water
Table 2: the Water Sproading rate of embodiment electrodialysis process
As can be seen from the result in table 1 and table 2, after the electrodialysis unit process applied for the treatment of the electrode for electrodialysis plate of high strong brine provided by the invention, most water obtains reuse.
Applicant states, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, namely do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to equivalence replacement and the interpolation of ancillary component, the concrete way choice etc. of each raw material of product of the present invention, all drops within protection scope of the present invention and open scope.
Claims (9)
1. for the treatment of an electrode for electrodialysis plate for high strong brine, it is characterized in that, described electrode for electrodialysis plate one side is deflector type curved surface.
2. an electrodialysis unit, containing at least one electrodialysis cell; With the gripping unit for described at least one electrodialysis cell clamping being linked to be entirety; Wherein, described electrodialysis cell comprises two electrode plate assemblies and the membrane stack between two electrode plate assemblies, described electrode plate assembly is made up of insulcrete and the battery lead plate embedded in insulcrete, it is characterized in that, described battery lead plate is the electrode for electrodialysis plate for the treatment of high strong brine according to claim 1, and the curved surface of described battery lead plate is towards membrane stack side.
3. electrodialysis unit as claimed in claim 2, it is characterized in that, described battery lead plate and insulcrete closely cooperate, to prevent the process water of electrodialysis unit through electrode plate assembly;
Preferably, described battery lead plate edge welds completely with insulcrete.
4. electrodialysis unit as described in Claims 2 or 3, is characterized in that, described electrode plate surface is coated with noble metal composite-material;
Preferably, described precious metal material be selected from ruthenium, according to or rhodium in the alloy of any a kind or at least 2 kinds.
5. electrodialysis unit as described in one of claim 2 ~ 4, is characterized in that, described battery lead plate connects power supply, and described power supply is preferably direct supply.
6. electrodialysis unit as described in one of claim 2 ~ 5, is characterized in that, the TDS >=10000mg/L of described high strong brine.
7. an electrodialysis process method for high strong brine desalination, is characterized in that, described electrodialysis process method adopts one of claim 2 ~ 5 described electrodialysis unit to carry out.
8. electrodialysis process method as claimed in claim 7, it is characterized in that, described method comprises the steps:
(1) by high strong brine through secondary filter process, removing large particulate matter, water 1 must be produced;
(2) product water 1 is passed into the described electrodialysis unit of one of claim 2 ~ 6, switch on power afterwards, regulate operating parameter, carry out electrodialysis unit process, water 2 must be produced.
9. the electrodialysis process method as described in one of claim 5 ~ 7, is characterized in that, passes into and produces water 1 at least after 15s, switch on power in electrodialysis unit.
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| CN201410855405.3A CN104591352B (en) | 2014-12-31 | 2014-12-31 | A kind of electrode for electrodialysis plate, electrodialysis plant and application method for being used to handle high strong brine |
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Address after: 101300 No. 12 Building, Mintai Road, Beiwu Town, Shunyi District, Beijing Patentee after: BEIJING JINGRUN ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY CO., LTD. Address before: 100085 Jiahua Building D812, No. 3 Shangdi East Road, Haidian District, Beijing Patentee before: Beijing Jingrun New Technology Development Co., Ltd. |
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Effective date of registration: 20190320 Address after: 101300 No. 12 Building, Mintai Road, Beiwu Town, Shunyi District, Beijing Patentee after: Beijing Jingrun Water Co., Ltd. Address before: 101300 No. 12 Building, Mintai Road, Beiwu Town, Shunyi District, Beijing Patentee before: BEIJING JINGRUN ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY CO., LTD. |