CN105858828A - Asymmetric-flow electrode desalting plant - Google Patents
Asymmetric-flow electrode desalting plant Download PDFInfo
- Publication number
- CN105858828A CN105858828A CN201610387035.4A CN201610387035A CN105858828A CN 105858828 A CN105858828 A CN 105858828A CN 201610387035 A CN201610387035 A CN 201610387035A CN 105858828 A CN105858828 A CN 105858828A
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- CN
- China
- Prior art keywords
- carbon
- chamber
- electrode
- exchange membrane
- negative electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C02F1/4691—Capacitive deionisation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
Abstract
The invention discloses an asymmetric-flow electrode desalting plant which comprises a desalted water treatment device, wherein the desalted water treatment device is formed by assembling a plurality of negative electrode chamber, an anion exchange membrane, a water treatment chamber, a cation exchange membrane and a positive electrode chamber through insulation fixing plates and bolts. The desalting unit is characterized in that a flow positive electrode compounded from a carbon material and manganese peroxide is arranged in the positive electrode chamber, and a flow negative electrode composed of a carbon material is arranged in each negative electrode chamber, thereby constituting an asymmetric-flow electrode unit; the flow positive electrode is an electrode solution prepared from a carbon-manganese peroxide composite and a soluble salt solution; and each flow negative electrode is an electrode solution prepared from carbon and a soluble salt salt. Compared with the prior art, the desalting plant has the advantages of high desalting efficiency, simple preparation process, high stability, high raw material utilization ratio, high operating voltage (up to 1.8V) and the like, thereby greatly enhancing the service life and operating safety of the plant.
Description
Technical field
The present invention relates to water-treatment technology field, the desalter of a kind of non-uniform flow formula electrode.
Background technology
The desalting technology of capacitive deionization (Capacitive Deionization, CDI), be for processed containing from
Sub-solution applies an electrostatic field so that ion is separated with water, thus obtains the water that ion concentration is relatively low.This water technology
When using flow-type electrode solution as electrode, owing to fresh electrode material can be continuously fed, it is possible to achieve ion adsorbs continuously,
And then realize high concentration saliferous water purification, the CDI technology of this improvement is referred to as flow-type capacitive deionization
(Flowable-electrode Capacitive Deionization, FCDI).
Flow-type capacitive deionization technology is compared with traditional water technology, and FCDI technology has that energy consumption is low, water conservancy
High, the simple operation and other advantages by rate.This technology can be used for such as water softening, precious metal is enriched with, prepared by high purity water, sea water is light
The fields such as change.
Existing flow-type capacitive deionization (FCDI) technology there is the problem that ion migration speed is relatively slow, so that ion
Cannot quickly be separated from the water, improving working voltage is a kind of migration velocity improving ion, and this method can improve ion
In adsorption process, the ion migration in water is to the speed of electrode material surface, thus realizes ion and be quickly separated from the water.Due to
The positive and negative electrode of FCDI device generally uses the active material (such as activated carbon) of same, and once working voltage is more than 1.23V, water
The water processed in chamber will decompose, and in turn results in the loss of energy consumption, serious situation, even have influence on device service life and
Running safety, the hydrogen of generation has the danger of blast, it would therefore be highly desirable to development one improves working voltage is not result in again water decomposition
FCDI device.
Summary of the invention
It is an object of the invention to the desalination dress of a kind of non-uniform flow formula electrode designed for the deficiencies in the prior art
Put, use AC/MnO2With the non-uniform flow formula positive and negative electrode unit of AC composition, make the oxygen evolution potential of positive pole raise, thus drop
The hydrogen-evolution overpotential of low negative pole, the working voltage of deionizer can reach 1.8 V, substantially increases the desalination effect of FCDI device
Rate, simple in construction, preparation is convenient, good stability, and processing cost is low, preferably resolves raising working voltage and is not result in again water
Decompose and the technical barrier of equipment safety operation, be especially suitable for the process application of deionized water.
The concrete technical scheme realizing the present invention is: the desalter of a kind of non-uniform flow formula electrode, including several
Cathode chamber, anion exchange membrane, water process chamber, cation exchange membrane and anode chamber by insulation fixing plate and bolts assemblies
Demineralized Water Production device, be characterized in anode chamber arranging the mobility anode compound with manganese dioxide by material with carbon element
Non-uniform flow formula positive and negative electrode unit, described mobility sun is constituted with the mobility negative electrode arranging material with carbon element in cathode chamber
The electrode material that extremely activated carbon, mesoporous carbon, carbon aerogels or carbon fiber carbon and manganese dioxide are combined is 0.1～1.0 with concentration
The soluble salt solutions of mol/L presses the anelectrode liquid of 2:8 weight ratio preparation；Described mobility negative electrode is activated carbon, mesoporous carbon, carbon
The negative electrode that aeroge or carbon fiber carbon are prepared by 2:8 weight ratio with the soluble salt solutions that concentration is 0.1～1.0 mol/L
Liquid；Described cathode chamber and water process and arrange anion exchange membrane between chamber, and water processes and arranges between chamber and anode chamber
Cation exchange membrane, anion exchange membrane and cation exchange membrane both sides are equipped with pad and process chamber and negative pole chamber with water respectively
Room or anode chamber are tightly connected.
Described material with carbon element is compound with manganese dioxide is by activated carbon, mesoporous carbon, carbon aerogels or carbon fiber and potassium permanganate
Mixing with deionized water, adding concentration after stirring 1 hour is that sulphuric acid continues stirring 1 hour, then stirs 1 at a temperature of 80 DEG C
H, reactant liquor is dried 8～12 hours after sucking filtration cleans at a temperature of 120 DEG C, and dried product is AC/MnO2Compound electricity
Pole material, described activated carbon, mesoporous carbon, carbon aerogels or carbon fiber and potassium permanganate, deionized water and the weight of 98% sulphuric acid
Volume ratio is 0.2 g:2 g:200 mL:1 mL.
Voltage between described non-uniform flow formula positive and negative electrode unit is 1.0～1.8 volts.
Described anion exchange membrane and cation exchange membrane are homogeneous or heterogeneous ion-exchange membrane.
It is excellent that the present invention compared with prior art has desalting efficiency height, simple, good stability, the raw material availability height of preparation etc.
Point, working voltage can reach 1.8 V, substantially increases service life and the safe operation of device.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram；
Fig. 2 is that the present invention specifically uses schematic diagram；
Fig. 3 is AC/MnO2Electrode material stereoscan photograph；
Fig. 4 is AC/MnO2The powder x-ray crystal diffraction pattern of electrode material；
Fig. 5 is the electrode material stereoscan photograph of activated carbon negative electrode；
Fig. 6 is AC and AC/MnO2The cyclic voltammetry curve figure of electrode material；
Fig. 7 is AC/MnO2Anelectrode and the cyclic voltammetry curve figure of AC negative electrode；
Fig. 8 is the desalting efficiency desalting efficiency comparison diagram with prior art of embodiment 1.
Detailed description of the invention
Refering to accompanying drawing 1, the present invention is processed chamber 4, cation friendship by several cathode chamber 1, anion exchange membrane 3, water
Change film 5 and anode chamber 6 forms, material with carbon element and manganese dioxide the mobility anode 61 being combined is set in anode chamber 6 with negative
The mobility negative electrode 11 being made up of material with carbon element is set in pole chamber 1 and constitutes non-uniform flow formula positive and negative electrode unit.Described sun from
Proton exchange 3 is arranged on cathode chamber 1 and water processes between chamber 4, and its material is high molecular polymer, and negative pole can be made to be formed
The chamber of one isolation, can make again the cation in aqueous solution can be smoothly through anion and then be blocked in water process chamber
In 4, and guarantee to be in state of insulation between cathode chamber 1 and water process chamber 4.Described pad 2 is used for the sealing of this device, its
Material is rubber-like and the resinae high polymers such as neoprene, ethylene propylene diene rubber or silica gel.Described water process chamber 4 for containing from
The passage that sub-aqueous solution flows through, is arranged between cation exchange membrane 3 and anion exchange membrane 5, and its material is salt water resistance corrosion
Acrylic, water process chamber 4 design aqueous solution to be met fully contact with ion exchange membrane, in addition it is also necessary to suitable thickness
Ensure suitable hydraulic pressure and the biggest capacitive character.Described insulation fixing plate 7 is arranged on the both sides of whole device, and its material is
Metallic plate or the plastic plate of insulation processing is done on surface, is then fastened by bolt 8, has both ensured the sealing of whole device,
Ensure again will not be short-circuited between device positive and negative electrode.Described anion exchange membrane 3 and cation exchange membrane 5 are homogeneous or different
Phase ion exchange membrane.
The present invention is made the most specifically by the specific embodiment below by way of the sodium chloride solution desalination to 0.1 M
Bright.
Embodiment 1
Refering to accompanying drawing 2, the present invention (A-FCDI) runs and uses DC source to power, and is applied respectively by the positive and negative electrode of DC source
At anode chamber 6 and the cathode chamber 1 at this device two ends, wherein, the mobility anode 61 in cathode chamber 1 is AC/MnO2Stream
Dynamic formula positive collector electrode, mobility negative electrode 11 bears collector electrode for carbon flow-type.By several cathode chamber 1 inlet pipes with negative
Electrode reservoir 12 outlet connects, and negative electrode liquid bath 12 inlet pipe is connected with the outlet of several cathode chamber 1；By several anode chamber
6 inlet pipes are connected with anelectrode liquid bath 62 outlet, and anelectrode liquid bath 62 inlet pipe is connected with the outlet of several anode chamber 6；By former water
Managing and be connected with several water process chamber 4 inlet pipe, several water process chamber 4 goes out pipe and is connected with desalting pipe.
Described material with carbon element and manganese dioxide (AC/MnO2) compound preparation: under room temperature, by activated carbon and potassium permanganate with go
Ionized water is by 0.1 g:1g:100 mL w/v mixing, by being that 2:100 volume ratio adds with deionized water after stirring 1 hour
Entering concentration is 98% sulphuric acid, continue stirring 1 hour, at a temperature of 80 DEG C, then stir 1 h, reactant liquor through sucking filtration clean after
Being dried 8～12 hours at a temperature of 120 DEG C, dried product is AC/MnO2Compound electrode material.
Refering to accompanying drawing 3, the AC/MnO of above-mentioned preparation2The scanned proof of electrode material, MnO2It is compound in AC template, its
Structure is multilamellar cavernous structure.
Refering to accompanying drawing 4, the AC/MnO of above-mentioned preparation2The product that the powder of electrode material obtains through the crystal diffraction of X-ray
It is AC/MnO2Composite, and prove MnO further2It is compound in AC template.
Refering to accompanying drawing 5, the scanned proof of AC electrode material, AC is micron particles shape material
Described mobility anode be activated carbon, mesoporous carbon, carbon aerogels or carbon fiber carbon with the complex of manganese dioxide with solvable
Property saline solution preparation electrode solution, its preparation is: by above-mentioned AC/MnO2Compound electrode material and the NaCl of 0.1 M are by 1.8:
10 weight ratio mixing, the slurry obtained after fully stirring evenly is the electrode solution of mobility anode 61.
Described mobility negative electrode is activated carbon, mesoporous carbon, carbon aerogels or carbon fiber carbon and soluble salt solutions preparation
Electrode solution, its preparation is: being mixed by 1:50 weight ratio by the NaCl of activated carbon and 0.1 M, the slurry obtained after fully stirring evenly is
The electrode solution of mobility negative electrode 11.
The present invention (A-FCDI) is performed such desalination: by the sodium chloride solution initial concentration that concentration is 0.1 M be
The pipeline that the saline of 0.1 M is connected by processing chamber 4 inlet pipe with several water injects each water and processes chamber 4, its feed flow
It is 50 mL/min；The electrode solution of above-mentioned preparation is individually positioned in anelectrode liquid bath 62 and negative electrode liquid bath 12, and by conveying
Equipment flows through cathode chamber 1 and anode chamber 6 forms the mobility negative electrode 11 of positive and negative two asymmetric super capacitors respectively and flows
Property anode 61 is also connected with external dc power, and the feed flow of its positive and negative electrode electrode solution is 50 mL/min.Connect unidirectional current
Source, water processes the anions and canons of chamber 4 and moves to cathode chamber 1 and anode chamber 6 under electric field action respectively, and adsorbs
On its corresponding electrode material thus realize desalination.
Refering to accompanying drawing 6～accompanying drawing 7, the determination of maximum working voltage of the present invention: use three in the NaCl solution of 1.0 M
Electrode method and two-probe method, use 10 mV/s to test positive and negative electrode electrode material respectively and make the cyclic curve of membrane electrode,
It it is 1.8 volts to maximum working voltage.
Refering to accompanying drawing 8, above-described embodiment desalination speed after measured reaches 19.81 mmol/g, is symmetrical FCDI device desalination
1.2 times of efficiency.
The present invention (A-FCDI) uses the flow-type electrode of asymmetry electrode material composition, expands the operation electricity of device
Pressure, improves the desalting efficiency of FCDI device, and preparation is simple, low cost.More than simply the present invention is further illustrated, and
Be not used to limit this patent, all for equivalence of the present invention implement, within being intended to be limited solely by the right of this patent.
Claims (4)
1. a desalter for non-uniform flow formula electrode, processes chamber including several cathode chamber, anion exchange membrane, water
Room, cation exchange membrane and anode chamber are existed by the Demineralized Water Production device of insulation fixing plate with bolts assemblies, its feature
The stream of material with carbon element is set in the mobility anode compound with manganese dioxide by material with carbon element and cathode chamber are set in anode chamber
Dynamic property negative electrode constitutes non-uniform flow formula positive and negative electrode unit, and described mobility anode is activated carbon, mesoporous carbon, carbon aerogels
Or carbon fiber carbon and the manganese dioxide electrode material being combined and the soluble salt solutions that concentration is 0.1～1.0 mol/L are by 2:8 weight
Amount is than the anelectrode liquid of preparation；Described mobility negative electrode is that activated carbon, mesoporous carbon, carbon aerogels or carbon fiber carbon are with concentration
The soluble salt solutions of 0.1～1.0 mol/L presses the negative electrode liquid of 2:8 weight ratio preparation；Described cathode chamber and water process chamber
Arranging anion exchange membrane between room, water processes and arranges cation exchange membrane, anion exchange membrane between chamber and anode chamber
It is equipped with pad with cation exchange membrane both sides and processes chamber and cathode chamber with water respectively or anode chamber is tightly connected.
The desalter of non-uniform flow formula electrode the most according to claim 1, it is characterised in that described
Material with carbon element and manganese dioxide are compound is by activated carbon, mesoporous carbon, carbon aerogels or carbon fiber and potassium permanganate and deionization
Water mixes, and adds sulphuric acid and continues stirring 1 hour, then stir 1 h at a temperature of 80 DEG C after stirring 1 hour, and reactant liquor is through sucking filtration
Being dried 8～12 hours at a temperature of 120 DEG C after cleaning, dried product is AC/MnO2Compound electrode material, described work
Property charcoal, mesoporous carbon, carbon aerogels or carbon fiber be 0.2 g with the w/v of potassium permanganate, deionized water and 98% sulphuric acid:
2 g:200 mL:1 mL.
The desalter of non-uniform flow formula electrode the most according to claim 1, it is characterised in that described non-uniform flow formula
Voltage between positive and negative electrode unit is 1.0～1.8 volts.
The desalter of non-uniform flow formula electrode the most according to claim 1, it is characterised in that described anion exchange membrane
It is homogeneous or heterogeneous ion-exchange membrane with cation exchange membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610387035.4A CN105858828A (en) | 2016-06-03 | 2016-06-03 | Asymmetric-flow electrode desalting plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610387035.4A CN105858828A (en) | 2016-06-03 | 2016-06-03 | Asymmetric-flow electrode desalting plant |
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| CN201610387035.4A Pending CN105858828A (en) | 2016-06-03 | 2016-06-03 | Asymmetric-flow electrode desalting plant |
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Cited By (3)
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|---|---|---|---|---|
| CN111253005A (en) * | 2020-02-04 | 2020-06-09 | 中国环境科学研究院 | Method for recycling anaerobic fermentation liquor |
| CN115159637A (en) * | 2022-06-02 | 2022-10-11 | 江苏科技大学 | Device for desalting seawater and recovering acid and alkali |
| WO2022262877A1 (en) * | 2021-06-17 | 2022-12-22 | 上海安江环保科技合伙企业(有限合伙) | Electrochemical assembly, device and method for particle constraint |
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Application publication date: 20160817 |