CN114074981B - Electrodeionization water purification device and household water purification device - Google Patents
Electrodeionization water purification device and household water purification device Download PDFInfo
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- CN114074981B CN114074981B CN202010809430.3A CN202010809430A CN114074981B CN 114074981 B CN114074981 B CN 114074981B CN 202010809430 A CN202010809430 A CN 202010809430A CN 114074981 B CN114074981 B CN 114074981B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 232
- 238000000746 purification Methods 0.000 title claims abstract description 84
- 238000009296 electrodeionization Methods 0.000 title claims abstract description 73
- 239000012528 membrane Substances 0.000 claims abstract description 79
- 238000000909 electrodialysis Methods 0.000 claims abstract description 52
- 230000000712 assembly Effects 0.000 claims abstract description 20
- 238000000429 assembly Methods 0.000 claims abstract description 20
- 239000003014 ion exchange membrane Substances 0.000 claims description 49
- 239000002351 wastewater Substances 0.000 claims description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 238000000926 separation method Methods 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 10
- 239000010439 graphite Substances 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 6
- 239000008213 purified water Substances 0.000 claims description 4
- 239000003011 anion exchange membrane Substances 0.000 abstract description 32
- 238000005341 cation exchange Methods 0.000 abstract description 21
- 238000003825 pressing Methods 0.000 description 13
- 230000009471 action Effects 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000005684 electric field Effects 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000008961 swelling Effects 0.000 description 5
- 150000001768 cations Chemical class 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 150000001450 anions Chemical class 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- -1 ca2+ Chemical class 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007646 directional migration Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
- C02F1/4695—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis electrodeionisation
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The embodiment of the application discloses electrodeionization water purification device and domestic purifier, electrodeionization water purification device electrodialysis subassembly and two at least electrode assemblies, the electrodialysis subassembly is located between two electrode assemblies, and the electrodialysis subassembly includes a plurality of cation exchange membrane and anion exchange membrane that the interval set up in turn. The electrode assembly comprises a first electrode and a second electrode, a waterproof piece is arranged between the first electrode and the second electrode, and the first electrode is electrically connected with the second electrode through the waterproof piece. And a conductive waterproof piece is arranged between the first electrode and the second electrode, so that the phenomenon that the normal operation of the electrode assembly is influenced after the part, which is in contact with the electrodialysis assembly, of the electrode assembly is damaged due to current concentration and the like is prevented, and the waterproof performance of the electrode assembly is improved.
Description
Technical Field
The application relates to the technical field of water purification, in particular to an electrodeionization water purification device and a household water purification device.
Background
Electrodialysis is to separate out water solution and other uncharged components from each other by utilizing the selective permeability of an ion exchange membrane and directional migration of charged ions through the ion exchange membrane under the action of a direct current electric field, thereby achieving the purposes of concentration, desalination, refining and purification of the solution.
The electrode used in the electrodialysis membrane stack in the current market comprises graphite with good electric conduction performance and oxidation-resistant carbon, wherein the carbon is covered on the graphite, so that the oxidation failure of the graphite caused by the contact of water in the electrodialysis membrane stack with the graphite is prevented. However, when the seal is improper or the carbon is physically broken, water may contact the graphite through the carbon.
Disclosure of Invention
The application provides an electrodeionization purifier and domestic purifier, can strengthen the waterproof performance of graphite electrode in the electrode assembly.
A first aspect of embodiments of the present application provides an electrodeionization water purification apparatus comprising:
at least two electrode assemblies;
an electrodialysis assembly positioned between the two electrode assemblies, the electrodialysis assembly comprising a plurality of ion exchange membranes arranged at intervals;
the electrode assembly comprises a first electrode and a second electrode, a waterproof piece is arranged between the first electrode and the second electrode, and the first electrode is electrically connected with the second electrode through the waterproof piece.
In the electrodeionization water purification apparatus provided in the embodiment of the present application, the waterproof member made of the conductive plastic cloth has a thickness of 0.05 mm to 1 mm.
In the electrodeionization water purification device provided by the embodiment of the application, the surface resistance value of the waterproof piece made of the conductive plastic cloth is 100 ohms to 200000 ohms.
In the electrodeionization water purification apparatus provided in the embodiment of the present application, the first electrode made of carbon is connected to the electrodialysis stack.
In the electrodeionization water purification device provided by the embodiment of the application, the electrodeionization water purification device further comprises a power supply assembly, and the second electrode made of graphite is connected with the power supply assembly;
when the power supply assembly supplies power, the electric potential of one electrode assembly on two sides of the electrodialysis assembly is higher than that of the other electrode assembly.
In the electrodeionization water purification device provided by the embodiment of the application, the electrodeionization water purification device further comprises a first pressing plate and a second pressing plate, and the first pressing plate and the second pressing plate are respectively abutted with the two second electrodes.
In the electrodeionization water purification device provided by the embodiment of the application, a first electricity receiving hole is formed in the first pressing plate, a second electricity receiving hole is formed in the second pressing plate, and the power supply assembly respectively penetrates through the first electricity receiving hole and the second electricity receiving hole to be electrically connected with two second electrodes.
In the electrodeionization water purification device provided by the embodiment of the application, a plurality of exchange membrane intervals are arranged among a plurality of ion exchange membranes.
In the electrodeionization water purification device provided by the embodiment of the application, a water inlet is arranged on the first pressing plate, and the exchange membrane is communicated with the water inlet at intervals;
when the water inlet is filled with water and the power supply assembly supplies power, one of any two adjacent exchange membrane intervals outputs pure water, and the other exchange membrane interval outputs wastewater.
In the electrodeionization water purification device provided by the embodiment of the application, the second pressing plate is provided with at least two water outlets so as to discharge water output by the exchange membrane at intervals.
In the electrodeionization water purification device provided by the embodiment of the application, the wastewater output by the exchange membrane at intervals flows out from one of the water outlets; pure water output by the exchange membrane at intervals flows out from the other one of the water outlets.
In the electrodeionization water purification device that this application embodiment provided, electrodeionization water purification device's the other end is equipped with the subassembly that catchments, the subassembly that catchments includes pure water route and waste water route, pure water route is used for concentrating the pure water that electrodeionization water purification device produced, waste water route is used for concentrating the waste water that electrodeionization water purification device produced.
A second aspect of embodiments of the present application provides a domestic water purification device comprising an electrodeionization water purification device as described previously.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects: the application provides an electrodeionization water purification device and domestic purifier, electrodeionization water purification device electrodialysis subassembly and two at least electrode assemblies, the electrodialysis subassembly is located between two electrode assemblies, and the electrodialysis subassembly is including a plurality of cation exchange membrane and anion exchange membrane that the interval set up in turn. The electrode assembly comprises a first electrode and a second electrode, a waterproof piece is arranged between the first electrode and the second electrode, and the first electrode is electrically connected with the second electrode through the waterproof piece. And a conductive waterproof piece is arranged between the first electrode and the second electrode, so that the phenomenon that the normal operation of the electrode assembly is influenced after the part, which is in contact with the electrodialysis assembly, of the electrode assembly is damaged due to current concentration and the like is prevented, and the waterproof performance of the electrode assembly is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an electrodeionization water purification apparatus according to one embodiment of the present application;
FIG. 2 is an exploded schematic view of the electrodeionization water purification apparatus of FIG. 1;
FIG. 3 is a schematic view of the electrodeionization water purification apparatus of FIG. 1 at another angle;
FIG. 4 is an exploded view of the water conducting mesh and ion exchange membrane of FIG. 2;
FIG. 5 is a schematic diagram of a combination of the water conducting mesh and ion exchange membrane of FIG. 2;
FIG. 6 is a schematic cross-sectional view of A-A of FIG. 5;
FIG. 7 is an exploded view of the water conducting mesh, ion exchange membrane and gasket of FIG. 2;
FIG. 8 is a schematic view of the combination of the water conducting mesh, ion exchange membrane and gasket of FIG. 2;
FIG. 9 is a schematic cross-sectional view of B-B in FIG. 8;
FIG. 10 is a schematic flow chart of the electrodeionization water purification apparatus of FIG. 1;
fig. 11 is a schematic flow chart of a household water purifying device according to an embodiment of the present application.
The figure shows:
1000. a household water purifying device;
10. an electrodeionization water purification device;
100. an electrode assembly; 110. a first electrode; 120. a second electrode; 130. a waterproof member;
200. an electrodialysis stack; 210. an ion exchange membrane; 2101. a groove; 211. a cation exchange membrane; 212. an anion exchange membrane; 220. a water-guiding grid; 230. exchange membrane spacing;
300. a first platen; 310. a water inlet; 320. a first conductive via;
400. a second pressing plate; 410. a water outlet; 420. a second conductive via;
500. a sealing gasket; 510. concave holes;
600. a fastener; 700. a power supply assembly;
800. a water collection assembly; 810. a purified water path; 820. a wastewater waterway;
20. a water flow pipeline;
201. a water inlet pipeline; 202. a pure water pipeline; 203. a first filter assembly; 204. a second filter assembly; 205. a heating unit; 206. and a water outlet valve.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1 to 3, an electrodeionization water purification apparatus 10 includes an electrodialysis unit 200 and at least two electrode assemblies 100, the electrodialysis unit 200 is disposed between the two electrode assemblies 100, and the electrodialysis unit 200 includes a plurality of cation exchange membranes 211 and anion exchange membranes 212 alternately disposed at intervals. The electrode assembly 100 includes a first electrode 110 and a second electrode 120, a waterproof member 130 is disposed between the first electrode 110 and the second electrode 120, and the first electrode 110 is electrically connected to the second electrode 120 through the waterproof member 130.
Specifically, the electrodeionization water purification apparatus 10 includes one or more pairs of electrode assemblies 100, i.e., the electrodeionization water purification apparatus 10 includes at least two electrode assemblies 100.
Wherein an electrodialysis unit 200 is disposed between at least one pair of electrode assemblies 100, and the electrodialysis unit 200 is disposed between two electrode assemblies 100.
The ion exchange membrane 210 is a thin film made of a polymer material having selective permeability to ions. Specifically, the cation exchange membrane 211 is an ion exchange membrane 210 in which the membrane body fixing group has negative ions and positive cations can be selectively permeated; the anion exchange membrane 212 is an ion exchange membrane 210 in which the membrane body anchoring groups carry positively charged ions, and optionally negatively charged anions.
By adopting the above technical scheme, the conductive waterproof member 130 is disposed between the first electrode 110 and the second electrode 120, so that the damage of the portion of the electrode assembly 100 contacting the electrodialysis assembly 200 due to the concentration of current and the like is prevented, the normal operation of the electrode assembly 100 is prevented, and the waterproof performance of the electrode assembly 100 is improved.
Illustratively, a first electrode 110 made of carbon is connected to the electrodialysis stack 200.
Illustratively, the second electrode 120, which is made of graphite, is connected to the power supply assembly 700.
It can be appreciated that the second electrode 120 having good electrical conductivity is connected to the power supply assembly 700 to improve the electrical energy utilization efficiency of the electrodeionization water purification apparatus 10, and the first electrode 110 having good oxidation resistance is connected to the electrodialysis assembly 200 to prevent oxidation failure of graphite caused by water contacting the second electrode 120 in the electrodialysis membrane stack.
Illustratively, the waterproof member 130 is made of conductive plastic cloth, and the thickness of the waterproof member 130 is 0.05 mm to 1 mm, such as 0.05 mm, 0.5 mm, 1 mm, or the like. It will be appreciated that the thicker the waterproof member 130, the better the waterproof performance; the thinner the thickness of the waterproof member 130, the better the conductivity. In the thickness range of 0.05 mm to 1 mm, the waterproof performance and the conductive performance of the waterproof member 130 can well satisfy the requirements of the electrode assembly 100.
Illustratively, the waterproof member 130 is made of a conductive plastic cloth having a surface resistance value of 100 ohms to 200000 ohms, such as 100 ohms, 1000 ohms, 200000 ohms, or the like. It can be appreciated that the smaller the area resistance value of the waterproof member 130, the better the conductivity but the higher the cost; the greater the sheet resistance of the waterproof member 130, the lower the cost, but the poorer the conductivity. Illustratively, in the area resistance value range of 100 to 1000 ohms, the conductivity of the waterproof member 130 satisfies the requirements of the electrode assembly 100, and the manufacturing cost can be controlled at a low level.
Referring to fig. 10, in an alternative embodiment, a plurality of exchange membrane spacers 230 are provided between the plurality of cation exchange membranes 211 and the plurality of anion exchange membranes 212. The raw water to be purified is ion-transferred while flowing in the exchange membrane interval 230, so that the raw water is purified.
Referring to fig. 1 to 3, in an alternative embodiment, the electrodeionization water purification apparatus 10 further includes a first platen 300 and a second platen 400, and the first platen 300 and the second platen 400 are respectively abutted against the two electrode assemblies 100. It will be appreciated that the primary purpose of the first platen 300 and the second platen 400 is to secure the components of the electrodeionization water purification apparatus 10 as a unit so that the electrodeionization water purification apparatus 10 operates properly.
Referring to fig. 1 and 2, in an alternative embodiment, a water inlet 310 is provided on the first platen 300, and the water inlet 310 communicates with the exchange membrane separation 230. The water inlet 310 may be connected to, for example, a tap water pipe, a water tank, etc.
Referring to fig. 10, in an alternative embodiment, the electrodeionization water purification apparatus 10 further includes a power supply assembly 700, and the power supply assembly 700 is electrically connected to the electrode assembly 100. When the power supply assembly 700 supplies power, the electric potential of one electrode assembly 100 at two sides of the electrodialysis assembly 200 is higher than the electric potential of the other electrode assembly 100, so that a potential difference is generated between the two electrode assemblies 100, raw water to be purified can enter an exchange membrane interval 230 between an anion exchange membrane 212 and a cation exchange membrane 211 through the water inlet 310, and ions in the exchange membrane intervals 230 are driven to migrate under the action of an electric field by the potential difference between the two electrode assemblies 100, so that the purification of raw water is completed.
Referring to fig. 10, in an alternative embodiment, when water is supplied from the water inlet 310 and the power supply assembly 700 supplies power, one of the two adjacent exchange membrane intervals 230 outputs pure water, and the other exchange membrane interval 230 outputs wastewater.
It will be appreciated that when water is fed from the water inlet 310 and the power supply assembly 700 supplies power, the ion exchange membranes 210 in the membrane separation 230, and when the electrode close to the higher potential is the cation exchange membrane 211, the membrane separation 230 outputs wastewater; when the higher potential electrode in the exchange membrane interval 230 is the anion exchange membrane 212, the exchange membrane interval 230 outputs pure water. I.e., the exchange membrane separation 230 between the cation exchange membrane 211 adjacent to the higher potential electrode and the adjacent anion exchange membrane 212, outputs wastewater; the ion exchange membrane separation 230 between the anion exchange membrane 212 adjacent to the higher potential electrode and the adjacent cation exchange membrane 211 outputs pure water.
Specifically, in the ion exchange membrane 210 in the exchange membrane interval 230, when the electrode close to the higher potential is the cation exchange membrane 211, cations such as na+ in raw water pass through the exchange membrane interval 230 under the action of an electric field, anions such as Cl-ions in raw water pass through the exchange membrane interval 230 under the action of an electric field, so that the salt solubility of water in the exchange membrane interval 230 is greater and greater, and the exchange membrane interval 230 outputs wastewater.
Specifically, in the ion exchange membrane 210 in the separation membrane 230, when the electrode close to the higher potential is the cation exchange membrane 211, cations such as na+ in the raw water pass through the separation membrane 230 under the action of an electric field, anions such as Cl-ions in the raw water pass through the separation membrane 230 under the action of the electric field, so that the salt solubility of water in the separation membrane 230 is smaller and smaller, and the separation membrane 230 outputs pure water.
Referring to fig. 2 and 3, in an alternative embodiment, the second pressing plate 400 is provided with at least two water outlets 410 to discharge the wastewater and pure water outputted from the exchange membrane interval 230, respectively. The waste water and the pure water are discharged through different water outlets 410 respectively for different purposes, the pure water can be used for drinking, cleaning and the like, and the waste water can be used for refining salt and the like.
Referring to fig. 1 to 3, in an alternative embodiment, a first conductive hole 320 is formed in a first platen 300, a second conductive hole 420 is formed in a second platen 400, and a power supply assembly 700 is electrically connected to an electrode assembly 100 through the first conductive hole 320 and the second conductive hole 420. It can be appreciated that the first conductive hole 320 and the second conductive hole 420 are provided with binding posts, and both ends of the binding posts are electrically connected with the electrode assembly 100 and the power supply assembly 700, respectively, so that the electrodeionization water purification apparatus 10 can be normally energized.
Referring to fig. 1 to 3, in an alternative embodiment, the first pressing plate 300 and the second pressing plate 400 are provided with a plurality of connection holes, and the electrodeionization water purification apparatus 10 further includes a fastener 600, where the fastener 600 is adapted to the number of connection holes. And the fastening member 600 is at least partially inserted into the connection hole such that the first and second pressing plates 300 and 400 are drawn toward each other, the ion exchange membrane 210 and the water guide mesh 220 in the electrodialysis unit 200 are pressed against each other, a complete water flow path is formed inside the electrodialysis unit 200, and simultaneously the sealing gasket 500, the electrodialysis unit 200 and the electrode unit 100 are drawn toward each other, so that the sealing gasket 500 can exert a sealing effect, preventing raw water to be purified from leaking.
Referring to fig. 10 and 11, in an alternative embodiment, the electrodeionization water purification apparatus 10 is provided with a water collection assembly 800, the water collection assembly 800 comprising a purified water waterway 810 and a wastewater waterway 820.
Wherein the pure water waterway 810 is used for concentrating pure water generated by the electrodeionization water purification apparatus 10, and the waste water waterway 820 is used for concentrating waste water generated by the electrodeionization water purification apparatus 10.
Illustratively, the wastewater discharged from the wastewater waterway 820 may be discharged to a wastewater tank via a pipeline, or discharged to a wastewater tank.
Illustratively, the pure water waterway 810 may be connected to a pure water tank so that a user obtains pure water from the pure water tank.
Referring to fig. 10, in an alternative embodiment, the electrodialysis stack 200 includes a plurality of anion exchange membranes 212 and a plurality of cation exchange membranes 211, the cation exchange membranes 211 and the anion exchange membranes 212 are alternately arranged, the cation exchange membranes 211 are heterogeneous membranes, and at least one of the anion exchange membranes 212 is a homogeneous or semi-homogeneous membrane.
Heterogeneous ion exchange membrane 210 is formed by mixing powdered ion exchange resin with binder, pulling up the sheet, screening, and hot pressing, and the resin is dispersed in the binder, so that the chemical structure is non-uniform, the mechanical properties are good, the manufacturing is simple, and the dialysis performance is poor.
The homogeneous ion exchange membrane 210 is prepared by introducing active groups into an inert polymer support, and has the advantages of uniform chemical structure, small pores, small membrane resistance, difficult leakage, excellent electrochemical performance, complex manufacture and lower mechanical strength. The semi-homogeneous ion exchange membrane 210 is also made by introducing active groups into the polymeric support, but the active groups and polymeric support do not form chemical bonds, which are intermediate in performance between the homogeneous ion exchange membrane 210 and the heterogeneous ion exchange membrane 210.
It will be appreciated that when the anion exchange membrane 212 is a heterogeneous membrane, cl "ions in water pass through the anion exchange membrane 212 under the action of direct current because of poor dialysis performance of the heterogeneous membrane, and cations such as ca2+, mg2+ and the like remain on the surface of the anion exchange membrane 212 and combine with carbonate in water to generate calcium carbonate and magnesium carbonate which are insoluble in water, so that the surface of the anion exchange membrane 212 is easy to form scale.
It will be appreciated that the higher the salt concentration, the greater the risk of fouling the surface of the anion exchange membrane 212. In the electrodeionization water purification apparatus 10, the risk of scaling the surface of the anion exchange membrane 212 increases as the salt concentration increases in the direction of water flow.
By adopting the above technical scheme, at least one of the anion exchange membranes 212 easy to scale is replaced by a homogeneous membrane or a semi-homogeneous membrane, the electrochemical performance of the anion exchange membranes 212 is improved, and the cation exchange membranes 211 difficult to scale are heterogeneous membranes, so that the anion exchange membranes 212 are not easy to scale any more while the manufacturing cost is not obviously increased, and the performance of the electrodeionization water purifying device 10 is greatly improved.
In an alternative embodiment, a plurality of anion exchange membranes 212 and a plurality of cation exchange membranes 211 are arranged and combined into a primary electrodialysis structure. It will be appreciated that in alternative embodiments, the plurality of anion exchange membranes 212 and the plurality of cation exchange membranes 211 are arranged and combined into a multi-stage electrodialysis structure, such as a secondary electrodialysis structure or a tertiary electrodialysis structure, etc.
It will be appreciated that in a multi-stage electrodialysis structure, the higher the salt concentration of water in the electrodialysis structure further back in the water flow direction, the greater the risk of scaling of the anion exchange membrane 212, and the use of a homogeneous or semi-homogeneous membrane for at least one of the anion exchange membranes 212 in the electrodialysis structure further back in the series can significantly reduce the risk of scaling of the electrodialysis assembly 200 without significantly reducing the manufacturing costs of the electrodialysis assembly 200, as compared to the use of a homogeneous or semi-homogeneous membrane for all of the anion exchange membranes 212 in the multi-stage electrodialysis structure.
Referring to fig. 4-6, in an alternative embodiment, the electrodialysis stack 200 further includes a plurality of water conducting grids 220, and the ion exchange membrane 210 is connected to the water conducting grids 220 to form a composite unit.
By adopting the technical scheme, the ion exchange membrane 210 and the water guide grid 220 are combined to form a composite whole, so that the steps of assembling the electrodeionization water purification device 10 are reduced, and the manufacturing cost of the ion exchange membrane 210 and the water guide grid 220 is reduced.
Referring to fig. 4 to 6, in an alternative embodiment, the ion exchange membrane 210 is provided with grooves 2101, and the water guide mesh 220 is disposed in the grooves 2101. In another alternative embodiment, the ion exchange membrane 210 covers the surface of the water guiding grid 220, which can ensure that the ion exchange membrane 210 and the water guiding grid 220 are connected to form a composite whole, which is not limited in this application.
It should be understood that the connection between the ion exchange membrane 210 and the water guiding mesh 220 may be one or more of welding (thermal welding, ultrasonic welding or high Zhou Bohan), bonding, etc., so that the ion exchange membrane 210 and the water guiding mesh 220 may be formed as a composite whole, which is not limited in this application.
It is understood that the swelling ratio of the ion exchange membrane 210 in both the length direction and the width direction is not more than 5%. Illustratively, the connection of the ion exchange membrane 210 to the water conducting mesh 220 is one or more of welding, adhesive, and the like. The water guide mesh 220 is made of a hydrophobic material, and does not expand due to contact with water, while the ion exchange membrane 210 has a swelling phenomenon after contact with water because of ion migration. In order to ensure the connection between the ion exchange membrane 210 and the water guide mesh 220, the swelling filter of the ion exchange membrane 210 is required to be not more than 5%, such as 5%,4% or 2%, so as to ensure that the ion exchange membrane 210 maintains the connection with the water guide mesh 220 in the normal operation of the electrodeionization water purification device 10, and the phenomena of fracture, breakage, etc. of the ion exchange membrane 210 due to water swelling or the phenomena of separation, etc. of the ion exchange membrane 210 and the water guide mesh 220 due to water swelling are avoided.
In an alternative embodiment, water conducting grids 220 are arranged alternating with ion exchange membranes 210 in electrodialysis stack 200. The ion exchange membrane 210 includes a first face provided with grooves 2101 and a second face opposite the first face, and in the electrodialysis stack 200, the first face of the ion exchange membrane 210 is oriented in the same direction as the first face of an adjacent ion exchange membrane 210, so that the water guiding grid 220 can function to split water in the exchange membrane compartment 230. Illustratively, the first sides of the ion exchange membranes 210 are each facing the first platen 300, and the first platen 300 has a water inlet 310 formed therein.
Illustratively, the first face of the ion exchange membrane 210 is flush with one face of the water conducting mesh 220.
Referring to fig. 1 to 2, in an alternative embodiment, a gasket 500 is provided between the electrodialysis stack 200 and the electrode assembly 100, the gasket 500 abutting against the electrode assembly 100. It will be appreciated that by providing the gasket 500, the raw water entering from the water inlet 310 must pass through the electrodialysis stack 200 without flowing out of the other channels.
Referring to fig. 2 and 7 to 9, in an alternative embodiment, the gasket 500 is provided with a recess 510, and the ion exchange membrane 210 and the water guide mesh 220 adjacent to the electrode assembly 100 are disposed in the recess 510 such that the ion exchange membrane 210, the water guide mesh 220 and the gasket 500 form a composite whole.
Illustratively, one face of the gasket 500 is flush with one face of the ion exchange membrane 210 and the other face of the gasket 500 is flush with one face of the water conducting mesh 220.
Referring to fig. 11, a second aspect of the present application provides a household water purification apparatus 1000, the household water purification apparatus 1000 comprising the aforementioned electrodeionization water purification apparatus 10.
In some embodiments, referring to fig. 11, the domestic water purification apparatus 1000 further comprises a water flow pipeline 20, the water flow pipeline 20 comprising a water inlet pipeline 201, a pure water pipeline 202 and a waste water pipeline, wherein the water inlet pipeline 201 is connected to the water inlet 310 of the electrodeionization water purification apparatus 10, the pure water pipeline 202 is connected to the pure water waterway 810 of the electrodeionization water purification apparatus 10, and the waste water pipeline is connected to the waste water waterway 820 of the electrodeionization water purification apparatus 10.
Illustratively, the inlet line 201 may be connected to a raw water tank.
Illustratively, the raw water tank may include a transparent housing or be provided with a transparent window thereon for facilitating a user to view the quality, level, etc. of water in the raw water tank.
Illustratively, the raw water tank may further comprise a water filling port through which water to be purified may be added to the raw water tank. For example, the water filling port is connected with a tap water pipe. Illustratively, a level gauge is also provided in the raw water tank, and when the level in the raw water tank drops to a set value, the valve of the tap water pipe can be controlled to open to add water to the water injection port of the raw water tank.
It will be appreciated that the water inlet line 201 may also be directly connected to a tap water line.
For example, referring to fig. 11, a first filter assembly 203 may be disposed on the water inlet pipe 201, so as to perform a certain purification treatment on the water entering the electrodeionization water purification device 10, for example, remove substances such as particulate impurities and residual chlorine, thereby reducing the workload and consumption of the electrodeionization water purification device 10.
Illustratively, as shown in fig. 11, a second filter assembly 204 may be provided on the pure water line 202 to further enhance the quality of the effluent and improve the mouthfeel.
For example, the first filter assembly 203, the second filter assembly 204 may include PP cotton filter cartridges and/or activated carbon filter cartridges, etc.
Illustratively, the first and second filter assemblies 203, 204 have a filter accuracy of no greater than 5 microns.
Illustratively, the outlet line includes an outlet valve 206, and the deionized water line 202 outputs deionized water when the outlet valve 206 is open.
Illustratively, at least one of the outlet lines is provided with a heating unit 205. The heating unit 205 includes, for example, a heat exchanger or the like. The heating unit 205 may heat the water flowing out of the pure water line 202 to provide the user with hot water of a desired temperature.
The electrodeionization water purification apparatus 10 and the household water purification apparatus 1000 provided in the above embodiments of the present specification include: the electrodeionization water purification apparatus 10 includes an electrodialysis assembly 200 and at least two electrode assemblies 100, the electrodialysis assembly 200 being positioned between the two electrode assemblies 100. The electrodialysis unit 200 includes a plurality of anion exchange membranes 212 and a plurality of cation exchange membranes 211, wherein the cation exchange membranes 211 and the anion exchange membranes 212 are alternately arranged, the cation exchange membranes 211 are heterogeneous membranes, and at least one of the anion exchange membranes 212 is a homogeneous membrane or a semi-homogeneous membrane. All or the most easily scaled part of the anion exchange membrane 212 which is easy to scale is a homogeneous membrane or a semi-homogeneous membrane, so that the scale on the anion exchange membrane 212 is effectively reduced and the scaling risk in the electrodeionization water purification device 10 and a pipeline and a water tank connected with the electrodeionization water purification device 10 is reduced while the manufacturing cost of the electrodeionization water purification device 10 is not obviously increased.
In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The above disclosure provides many different embodiments or examples for implementing different structures of the present application. The components and arrangements of specific examples are described above in order to simplify the disclosure of this application. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. An electrodeionization water purification apparatus comprising:
at least two electrode assemblies;
an electrodialysis assembly positioned between the two electrode assemblies, the electrodialysis assembly comprising a plurality of ion exchange membranes arranged at intervals;
the electrode assembly comprises a first electrode and a second electrode, a waterproof piece is arranged between the first electrode and the second electrode, and the first electrode is electrically connected with the second electrode through the waterproof piece;
the first electrode made of carbon is connected to the electrodialysis stack;
the electrodeionization water purification device further comprises a power supply assembly, and the second electrode made of graphite is connected with the power supply assembly;
when the power supply assembly supplies power, the electric potential of one electrode assembly on two sides of the electrodialysis assembly is higher than that of the other electrode assembly.
2. The electrodeionization water purification apparatus of claim 1, wherein the waterproof member is made of a conductive plastic cloth having a thickness of 0.05 mm to 1 mm.
3. The electrodeionization water purification apparatus of claim 1, wherein the waterproof member is made of a conductive plastic cloth having a sheet resistance of 100 to 200000 ohms.
4. The electrodeionization water purification apparatus of claim 1, further comprising a first platen and a second platen, the first platen and the second platen respectively abutting the two second electrodes.
5. The electrodeionization water purification apparatus of claim 4, wherein a first electrical connection hole is formed in the first pressure plate, a second electrical connection hole is formed in the second pressure plate, and the power supply assembly is electrically connected to the two second electrodes through the first electrical connection hole and the second electrical connection hole, respectively.
6. The electrodeionization water purification apparatus of claim 5, wherein a plurality of the ion exchange membranes are spaced apart.
7. The electrodeionization water purification apparatus of claim 6, wherein the first platen has a water inlet and the exchange membrane compartment is in communication with the water inlet;
when the water inlet is filled with water and the power supply assembly supplies power, one of any two adjacent exchange membrane intervals outputs pure water, and the other exchange membrane interval outputs wastewater.
8. The electrodeionization water purification apparatus of claim 7, wherein the second platen is provided with at least two water outlets to remove water from the spaced-apart output of the exchange membrane.
9. The electrodeionization water purification apparatus of claim 8, wherein the wastewater from the separation of the exchange membranes flows out of one of the water outlets; pure water output by the exchange membrane at intervals flows out from the other one of the water outlets.
10. The electrodeionization water purification apparatus of any one of claims 1 to 9 further comprising a water collection assembly comprising a purified water path for concentrating purified water produced by the electrodeionization water purification apparatus and a wastewater path for concentrating wastewater produced by the electrodeionization water purification apparatus.
11. A domestic water purification apparatus comprising an electrodeionization water purification apparatus of any one of claims 1-10.
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| CN202010809430.3A CN114074981B (en) | 2020-08-12 | 2020-08-12 | Electrodeionization water purification device and household water purification device |
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