CN212864232U - Separation device and water treatment equipment thereof - Google Patents
Separation device and water treatment equipment thereof Download PDFInfo
- Publication number
- CN212864232U CN212864232U CN202020326664.8U CN202020326664U CN212864232U CN 212864232 U CN212864232 U CN 212864232U CN 202020326664 U CN202020326664 U CN 202020326664U CN 212864232 U CN212864232 U CN 212864232U
- Authority
- CN
- China
- Prior art keywords
- electrode
- membrane
- exchange membrane
- porous
- bipolar membrane
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
A separator and its water treatment equipment, the bipolar membrane electrodeionization device includes at least a pair of characteristic electrode groups and more than one bipolar membrane positioned between two electrodes forming characteristic electrode group, said electrode group at least includes a porous electrode, every bipolar membrane is formed from cation exchange membrane and anion exchange membrane which are stuck together. The bipolar membrane electrodeionization device adopts the structure of the porous electrode and the bipolar membrane, can avoid the problems of gas generation and scaling caused by hydrolysis of water in an electrode chamber in the prior art, can improve the desalination rate, and has the characteristics of high water making rate and less water resource waste.
Description
Technical Field
The utility model relates to a water treatment technical field especially relates to a bipolar membrane electrodeionization device and have device's water treatment facilities.
Background
In the traditional electrochemical deionization device, a flow channel between an electrode and an ion exchange membrane is an electrode water chamber, wherein oxidation reaction is carried out in an anode chamber to generate oxygen, anode water is acidic, and the anode is easily corroded; the reduction reaction is carried out in the cathode chamber to generate hydrogen, cathode water is alkaline, and scaling is easy to form on the cathode. Therefore, the generation of gas and scale causes an increase in the voltage drop in the polar water chamber, making the device unstable in operation and less efficient overall. In addition, the electrode chamber of the electrochemical deionization device does not have the desalting function, and the liquid flow passing through the electrode chamber is separately drawn out in the design generally, so that the pollution to the pure water is prevented. In order to prevent the liquid flow of the electrode chamber from entering the pure water flow, the requirement on the sealing property of the flow channel of the membrane stack is high, the flow channel is complex in design, and the cost is high. In addition, the design needs to consider the exhaust problem of the polar chamber flow passage to prevent the gas from being held in the flow passage. In a word, the electrode chamber makes the structural design of electrochemical deionization become very complicated, once the control is not good, the desalting performance is reduced, even the water flow is blocked, the electrode is burnt and the like.
Therefore, it is necessary to provide a bipolar membrane electrodeionization device and a water treatment apparatus thereof to overcome the deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to avoid prior art's weak point and provide a bipolar membrane electrodeionization device and have device's water treatment facilities, can avoid the problem that the utmost point room water of utmost point room aquatic is hydrolyzed and is produced gas and scale deposit among the prior art, and can improve the desalination, the system water rate is high moreover, and the water waste is few.
The purpose of the utility model is realized through the following technical measures.
The utility model provides a bipolar membrane electrodeionization device, which comprises at least one pair of characteristic electrode groups and more than one bipolar membrane positioned between two electrodes forming the characteristic electrode groups, wherein the characteristic electrode groups at least comprise a porous electrode, each bipolar membrane is formed by a cation exchange membrane and an anion exchange membrane which are attached together, and no flow channel is arranged between the cation exchange membrane and the anion exchange membrane which form the same bipolar membrane.
Preferably, in the bipolar membrane electrodeionization device, the porous electrode is provided with a porous material having a porous structure with a pore size of 0.5 to 50 nm.
Preferably, in the bipolar membrane electrodeionization device, the porous material is one or more of activated carbon, carbon black, carbon nanotubes, graphite, carbon fibers, carbon cloth, carbon aerogel, metal powder, metal oxide and conductive polymer.
Preferably, in the bipolar membrane electrodeionization device, the porous electrode is further provided with a current collector, and the current collector is laminated with the porous material.
Preferably, in the bipolar membrane electrodeionization device, the current collector is made of one or more materials selected from the group consisting of metals, metal alloys, graphite, graphene, carbon nanotubes and conductive plastics.
Preferably, in the above bipolar membrane electrodeionization device, the porous electrode is further provided with an ion exchange membrane, and the porous material and the ion exchange membrane are stacked.
Preferably, in the above bipolar membrane electrodeionization device, the ion exchange membrane in the porous electrode is an anion exchange membrane or a cation exchange membrane.
Preferably, in the above bipolar membrane electrodeionization apparatus, one of the porous electrodes has a cation exchange membrane, defined as an anode electrode; the other porous electrode has an anion exchange membrane, defined as a negative membrane electrode;
the anion-exchange membrane in the bipolar membrane closest to the anode electrode faces the anode electrode;
the cation-exchange membrane in the bipolar membrane closest to the cathode electrode faces the cathode electrode.
Preferably, in the above bipolar membrane electrodeionization device, a salt solution is encapsulated in the porous material, and the mass percentage of the salt solution in the porous material is not less than 10%.
The utility model discloses provide a water treatment facilities simultaneously, have foretell bipolar membrane electrodeionization device.
The utility model discloses a bipolar membrane electrodeionization device and water treatment facilities thereof, include at least a pair of characteristic electrode group and be located the more than one bipolar membrane between two electrodes that constitute characteristic electrode group, characteristic electrode group includes a porous electrode at least, and every bipolar membrane comprises cation exchange membrane and anion exchange membrane that the laminating is in the same place, constitutes no runner between the cation exchange membrane and the anion exchange membrane of same bipolar membrane. The bipolar membrane electrodeionization device adopts the structure of the porous electrode and the bipolar membrane, can avoid the problems of gas generation and scaling caused by hydrolysis of water in an electrode chamber in the prior art, can improve the desalination rate, and has the characteristics of high water making rate and less water resource waste.
Drawings
The present invention will be further described with reference to the accompanying drawings, but the contents in the drawings do not constitute any limitation to the present invention.
FIG. 1 is a schematic diagram showing the desalination state of a bipolar membrane electrodeionization apparatus according to example 1 of the present invention.
Fig. 2 is a schematic view of the regeneration state of the bipolar membrane electrodeionization device of example 1 of the present invention.
FIG. 3 is a schematic diagram showing the desalination state of a bipolar membrane electrodeionization apparatus according to example 2 of the present invention.
Fig. 4 is a schematic view of the regeneration state of the bipolar membrane electrodeionization device of example 2 of the present invention.
In fig. 1 to 4, the following are included:
a first porous electrode 100,
A first current collector 130, a first porous material 110, a first anion exchange membrane 120,
A second porous electrode 200,
A second current collector 230, a second porous material 210, a first cation exchange membrane 220, a bipolar membrane 300, a second cation exchange membrane 310, a second anion exchange membrane 320.
Detailed Description
The present invention will be further illustrated with reference to the following examples.
Unless clearly defined otherwise herein, the scientific and technical terms used have the meaning commonly understood by those of skill in the art to which this application pertains. As used in this application, the terms "comprising," "including," "having," or "containing" and similar referents to shall mean that the content of the listed items is within the scope of the listed items or equivalents thereof.
In the specification and claims, the singular and plural of all terms are not intended to be limiting unless the context clearly dictates otherwise. The use of "first," "second," and similar language in the description and claims of this application does not denote any order, quantity, or importance, but rather the intention is to distinguish one material from another, or embodiment.
Unless the context clearly dictates otherwise, the term "or", "or" does not mean exclusively, but means that at least one of the mentioned items (e.g. ingredients) is present, and includes the case where a combination of the mentioned items may be present.
Reference in the specification to "some embodiments" or the like means that a particular element (e.g., feature, structure, and/or characteristic) described in connection with the invention is included in at least one embodiment described in the specification, and may or may not be present in other embodiments. In addition, it is to be understood that the elements of the invention may be combined in any suitable manner.
Reference herein to "deionization" is to the removal of ions from the liquid to be treated, including anions and cations in various valence states. In most cases, "deionization" has the same meaning as "desalination". In some cases, deionization is also referred to as demineralization.
Example 1.
The characteristic electrode group at least comprises a porous electrode, each bipolar membrane is composed of a cation exchange membrane and an anion exchange membrane which are attached together, and no flow channel exists between the cation exchange membrane and the anion exchange membrane which form the same bipolar membrane.
The pair of characteristic electrode groups may be formed by two porous electrodes, or the pair of characteristic electrode groups may be formed by one porous electrode and one common electrode. Common electrodes such as metal electrodes, titanium electrodes with ruthenium-yttrium coatings, ruthenium-yttrium electrodes, carbon electrodes, graphite electrodes, etc.
Among them, the porous electrode may be composed of a porous material, or a porous material and a current collector laminated, or a current collector, a porous material, and an ion exchange membrane laminated in this order. The ion exchange membrane is an anion exchange membrane or a cation exchange membrane, and when the ion exchange membrane is contained, the ion exchange membrane in the porous electrode is close to the bipolar membrane. The cation exchange membrane or the anion exchange membrane in the porous electrode can be flexibly selected according to actual needs.
The porous material may be any electrically conductive material having a large specific surface, e.g. a specific surface of more than 100m2Conductive material per gram. In some embodiments, the porous material is a hydrophobic, electrically conductive material. The porous material has a porous structure with pore sizes between 0.5 and 50 nanometers. The porous material can be an electric conductor prepared from one or more of activated carbon, carbon black, carbon nanotubes, graphite, carbon fibers, carbon cloth, carbon aerogel, metal powder (such as nickel), metal oxide (such as ruthenium oxide) and conductive polymer. In one embodiment, the porous material is a sheet or plate structure made of activated carbon and having a thickness in the range of 100 to 5000 micrometers, preferably 200 to 2,500 micrometers, and the pore size of the activated carbon sheet structure is between 0.5 to 20 nanometers, preferably 1 to 10 nanometers.
The porous electrode can reduce the scaling risk of the bipolar membrane electrodeionization device. Since the ion exchange membrane contains or is adsorbed with ion charge units, when the amount of ions at the porous electrode is insufficient to complete the desorption process, the excess charge on the electrode is buffered by releasing the ions in the ion exchange membrane to help complete the desorption process. In this way, the risk of fouling of the electrochemical deionization unit is greatly reduced.
The current collector is used to connect to a wire or power source, also referred to as a "current collector". The current collector is formed of one or more materials selected from the group consisting of metals, metal alloys, graphite, graphene, carbon nanotubes, and conductive plastics. The current collector may be in any suitable form such as a plate, mesh, foil or sheet. In some embodiments, the current collector may be made of a metal or metal alloy, suitable metals include titanium, platinum, iridium or rhodium, etc., preferably titanium, and suitable metal alloys may be stainless steel, etc. In other embodiments, the current collector may be made of a conductive carbon material, such as graphite, graphene, carbon nanotubes, and the like. In other embodiments, the current collector is made of a conductive plastic material, such as a polyolefin (e.g., polyethylene), and conductive carbon black or metal particles, etc., may be mixed therein. In some embodiments, the current collector is a sheet or plate-like structure and may have a thickness in the range of 50 micrometers to 5 millimeters. In some embodiments, the current collector and the porous electrode have substantially the same shape and/or size.
When the porosity and conductivity of the porous material are sufficient, the current collector may not be provided when the porous material itself functions as the current collector.
The bipolar membrane electrodeionization device of the present embodiment may be configured by a plurality of electrode groups, and when the bipolar membrane electrodeionization device includes a plurality of electrode groups, the electrode groups may be connected to each other through flow channels in series or in parallel or in a series-parallel manner. In the present specification, the terms "in series" and "in parallel" are defined in consideration of the flow direction of the flow path liquid flow output liquid. For example, if two electrode sets are connected in series, the product fluid from the flow channel of the previous electrode set enters the flow channel of the next electrode set. For another example, if two electrode sets are connected in parallel, it means that the flow channels of the two electrode sets receive the same liquid. The series set of electrodes is used to further remove ions from the liquid, while the parallel set of electrodes is used to increase the throughput of the device.
The technical solution of the present invention will be described below by taking the bipolar membrane electrodeionization device shown in fig. 1 and 2 as an example.
The bipolar membrane electrodeionization device comprises,
the pair of electrodes consisting of a pair of porous electrodes, the first porous electrode 100 and the second porous electrode 200, constitutes a characteristic electrode group due to the two porous electrodes;
two bipolar membranes 300 arranged between the electrode pairs, wherein each bipolar membrane 300 is composed of a second cation exchange membrane 310 and a second anion exchange membrane 320 which are attached together, no flow channel is arranged between the second cation exchange membrane 310 and the second anion exchange membrane 320 which form the same bipolar membrane 300, and the arrangement modes of the two bipolar membranes 300 are the same;
and a flow channel formed between the electrode and the membrane stack or between the membrane stack and the membrane stack.
In the present embodiment, the first porous electrode 100 is formed by laminating the first collector 130 and the first porous material 110, and the first porous electrode 100 is a cathode film electrode. The second porous electrode 200 is formed by sequentially laminating a second collector 230 and a second porous material 210, and the second porous electrode 200 is an anode membrane electrode. The porous electrode can be formed by laminating and clamping a current collector and a porous material together without using a binder; or may be fixed by thermal bonding or bonded by an adhesive.
The cation exchange membrane or the anion exchange membrane in the porous electrode can be flexibly selected according to actual needs.
The bipolar membrane 300 is composed of a second cation exchange membrane 310 and a second anion exchange membrane 320 which are attached together, and the second cation exchange membrane 310 and the second anion exchange membrane 320 which form the same bipolar membrane are clamped tightly without a binder; the second cation exchange membrane 310 and the second anion exchange membrane 320 may be formed by thermal lamination. There is no flow channel between the second cation exchange membrane 310 and the second anion exchange membrane 320, a flow channel is formed between the bipolar membrane and the bipolar membrane or a flow channel is formed between the bipolar membrane and the electrode. The bipolar membranes sold in the market can be used as the bipolar membranes in the scheme, and the details are not repeated.
In this embodiment, there are two bipolar membranes 300 between the first porous electrode 100 and the second porous electrode 200, the arrangement directions of the two bipolar membranes 300 are the same, and the same arrangement direction means that the orientation of the second cation exchange membrane 310 of each bipolar membrane 300 is the same, and certainly the orientation of the corresponding second anion exchange membrane 320 of each bipolar membrane 300 is also necessarily the same. It should be noted that the number of the bipolar membranes 300 is not limited to two in this embodiment, and can be flexibly set according to actual needs, and the number of the bipolar membranes 300 between the general electrode pairs is 1-50, or even more.
As shown in FIG. 1, in the bipolar membrane electrodeionization apparatus, a cation exchange membrane of a bipolar membrane faces a positive electrode in a desalting process, and raw water is desalted in a flow channel formed between the two bipolar membranes. Anions in the raw water, e.g. Cl-Moving toward the positive electrode to replace OH in the left anion exchange membrane-，OH-Entering a flow channel; with cations such as Na in the raw water+Moving toward the negative electrode to replace H in the cation exchange membrane of the bipolar membrane on the right side+Ion, H+Entering a flow channel; h+And OH-Neutralization reaction occurs in the flow channel to generate water, so that salt in raw water is removed, and pure water is discharged from the tail end of the flow channel.
In the first flow path (i.e., anode chamber) formed by the porous electrode 100 and the adjacent bipolar membrane 300 to which the forward voltage is applied and the two, anions such as Cl in the raw water-Moves towards the positive electrode and is adsorbed by the porous electrode 110, and simultaneously, cations such as Na + in the raw water move towards the bipolar membrane to replace H in the cationic membrane+And ions are used for removing salt in the raw water, and at the moment, the pure water discharged from the tail end of the flow passage is acidic. Similarly, in the second flow channel (i.e., cathode chamber) formed by the porous electrode 200 and the adjacent bipolar membrane 300, which are applied with negative voltage, the cations such as Na in the raw water+Moves toward the negative electrode and is adsorbed by the porous electrode 210; while Cl in the raw water-Moving towards the bipolar membrane to replace OH in the cationic resin membrane-And ions are used for removing the salt in the raw water, and at the moment, the pure water discharged from the tail end of the flow channel is alkaline. The pure water in the first flow passage and the pure water in the second flow passage are gathered together, H+And OH-Water is generated by neutralization, and finally neutral pure water is formed.
When desalination is carried out to oneAfter a certain period of time, reverse-pole regeneration is required to release the ions in the water adsorbed on the bipolar membrane. At this time, as shown in FIG. 2, OH groups are generated in the interface layer of the cationic and anionic membranes of the bipolar membrane under an electric field-And H+Ionic, cation inside cationic membrane of right bipolar membrane, e.g. Na+Quilt H+The ions are displaced and move to the negative electrode, and anions such as Cl in the anion membrane of the left bipolar membrane-Is covered with OH-The displacement toward the positive electrode, Na+、Cl-And enters the flow channel to complete the regeneration.
At this time, in the first flow channel formed by the porous electrode 100 and the adjacent bipolar membrane 300 to which the negative voltage is applied and the two, the anions such as Cl adsorbed by the porous electrode 110-Moving to the positive electrode, desorbing, and entering the flow channel; while Na inside the anode membrane of the bipolar membrane+Quilt H+Displacing the cathode towards the negative electrode and entering the flow channel; discharging the concentrated water containing salt out of the membrane pile to complete regeneration. Meanwhile, in the second flow path formed by the porous electrode 200 to which the positive voltage is applied, the adjacent bipolar membrane 300 and the two, the cation such as Na adsorbed in the porous electrode 210+Moving towards the negative electrode and entering a flow channel; while Cl inside the negative membrane of the bipolar membrane-Is covered with OH-Displacing, moving towards the positive electrode and entering a flow channel; discharging the concentrated water containing salt out of the membrane pile to complete regeneration.
In the bipolar membrane electrodeionization apparatus of this embodiment, the porous material is in direct contact with the flow channel, and the bipolar membrane between the porous electrodes is arranged in the same manner. In the manner of this example, desalination and regeneration can be achieved. Under the desalting condition, the porous material can adsorb anions and cations in raw water, and has no selectivity and the adsorption efficiency of about 50 percent. Under the regeneration condition, anions and cations in the porous material can be desorbed into the flow channel to realize the regeneration.
The utility model discloses a bipolar membrane electrodeionization device, when making water, all single channels prepare water simultaneously, do not have dense water to produce. During regeneration, the regeneration can be realized by reversing the poles, and the regeneration process is also carried out in a single channel. Therefore, the utility model discloses a bipolar membrane electrodeionization device water route simple structure.
The bipolar membrane electrodeionization device repeatedly utilizes the membrane area of the bipolar membrane, and the electrolytic ion exchange mode greatly improves the speed and efficiency of ion exchange. The utility model discloses a bipolar membrane electrodeionization device can not produce gas in the polar water, also can not cause scale deposit phenomenon.
Therefore, the bipolar membrane electrodeionization device adopts the structure of the porous electrode and the bipolar membrane, can avoid the problems of gas generation and scaling caused by the hydrolysis of polar water in the prior art, can improve the desalination rate, and has the characteristics of high water making rate and less water resource waste.
In addition, experiments show that the porous electrode not only solves the problem of gas generation of the metal electrode, but also can realize the design of independent water outlet of the electrode chamber flow passage. And the whole desalting efficiency of the electrodeionization device adopting the porous electrode can be improved by more than 8 percent compared with that of the common electrode. This is because the porous electrode can adsorb ions of raw water, and this adsorption efficiency is higher than the ion exchange efficiency of the bipolar membrane.
The bipolar membrane electrodeionization device of the present embodiment may be in a plate frame type or spiral roll type, and may have a rectangular parallelepiped, cube, or cylindrical shape. Fig. 1 and 2 in this embodiment are schematic cross-sectional views, and those skilled in the art can obtain products of various shapes according to the sectional views.
Example 2.
A bipolar membrane electrodeionization apparatus, as shown in fig. 3 and 4, having the same other features as those of embodiment 1 except that in this embodiment: the first porous electrode 100 is formed by sequentially laminating a first collector 130, a first porous material 110, and a first anion exchange membrane 120, and the first porous electrode 100 is a cathode membrane electrode. The second porous electrode 200 is formed by sequentially laminating a second collector 230, a second porous material 210, and a first cation exchange membrane 220, and the second porous electrode 200 is an anode membrane electrode. The porous electrode can be formed by overlapping and clamping a current collector, a porous material and an ion exchange membrane together without using a binder; or may be fixed by thermal bonding or bonded by an adhesive.
The bipolar membrane electrodeionization apparatus of the present embodiment, in which the desalination process is such that the cation exchange membrane of the bipolar membrane faces the positive electrode and the raw water is desalinated in the flow channel formed between the two bipolar membranes as shown in FIG. 3, is used in the desalination process. Anions in the raw water, e.g. Cl-Moving toward the positive electrode to replace OH in the left anion exchange membrane-，OH-Entering a flow channel; with cations such as Na in the raw water+Moving toward the negative electrode to replace H in the cation exchange membrane of the bipolar membrane on the right side+Ion, H+Entering a flow channel; h+And OH-Neutralization reaction occurs in the flow channel to generate water, so that salt in raw water is removed, and pure water is discharged from the tail end of the flow channel.
In the first flow path (i.e., anode chamber) formed by the porous electrode 100 and the adjacent bipolar membrane 300 to which the forward voltage is applied and the two, anions such as Cl in the raw water-Moves towards the positive electrode and is adsorbed by the porous electrode 110, and simultaneously, cations such as Na + in the raw water move towards the bipolar membrane to replace H in the cationic membrane+And ions are used for removing salt in the raw water, and at the moment, the pure water discharged from the tail end of the flow passage is acidic. Similarly, in the second flow channel (i.e., cathode chamber) formed by the porous electrode 200 and the adjacent bipolar membrane 300, which are applied with negative voltage, the cations such as Na in the raw water+Moves toward the negative electrode and is adsorbed by the porous electrode 210; while Cl in the raw water-Moving towards the bipolar membrane to replace OH in the cationic resin membrane-And ions are used for removing the salt in the raw water, and at the moment, the pure water discharged from the tail end of the flow channel is alkaline. The pure water in the first flow passage and the pure water in the second flow passage are gathered together, H+And OH-Water is generated by neutralization, and finally neutral pure water is formed.
When desalination is carried out for a period of time, reverse-pole regeneration is required to release ions in water adsorbed on the bipolar membrane. At this time, as shown in fig. 4, OH is generated in the interface layer of the cationic membrane and the anionic membrane of the bipolar membrane under the electric field-And H+Ionic, cation inside cationic membrane of right bipolar membrane, e.g. Na+Quilt H+The ions are displaced and move to the negative electrode, and anions such as Cl in the anion membrane of the left bipolar membrane-Is covered with OH-The displacement toward the positive electrode, Na+、Cl-And enters the flow channel to complete the regeneration.
At this time, in the first flow channel formed by the porous electrode 100 and the adjacent bipolar membrane 300 to which the negative voltage is applied and the two, the anions such as Cl adsorbed by the porous electrode 110-Moving to the positive electrode, desorbing, and entering the flow channel; while Na inside the anode membrane of the bipolar membrane+Quilt H+Displacing the cathode towards the negative electrode and entering the flow channel; discharging the concentrated water containing salt out of the membrane pile to complete regeneration. Meanwhile, in the second flow path formed by the porous electrode 200 to which the positive voltage is applied, the adjacent bipolar membrane 300 and the two, the cation such as Na adsorbed in the porous electrode 210+Moving towards the negative electrode and entering a flow channel; while Cl inside the negative membrane of the bipolar membrane-Is covered with OH-Displacing, moving towards the positive electrode and entering a flow channel; discharging the concentrated water containing salt out of the membrane pile to complete regeneration.
The utility model discloses a bipolar membrane electrodeionization device, when making water, all single channels prepare water simultaneously, do not have dense water to produce. During regeneration, the regeneration can be realized by reversing the poles, and the regeneration process is also carried out in a single channel. Therefore, the utility model discloses a bipolar membrane electrodeionization device water route simple structure.
The bipolar membrane electrodeionization device repeatedly utilizes the membrane area of the bipolar membrane, and the electrolytic ion exchange mode greatly improves the speed and efficiency of ion exchange. The utility model discloses a bipolar membrane electrodeionization device can not produce gas in the polar water, also can not cause scale deposit phenomenon.
Therefore, the bipolar membrane electrodeionization device adopts the structure of the porous electrode and the bipolar membrane, can avoid the problems of gas generation and scaling caused by the hydrolysis of polar water in the prior art, can improve the desalination rate, and has the characteristics of high water making rate and less water resource waste.
In addition, experiments show that the porous electrode not only solves the problem of gas generation of the metal electrode, but also can realize the design of independent water outlet of the electrode chamber flow passage. And compared with the common electrode, the whole desalting efficiency of the electrodeionization device adopting the porous electrode can be improved by more than 10 percent, and the desalting efficiency is improved by a higher degree than that of the structure in the embodiment 1. This is because the porous electrode can adsorb ions of raw water, and this adsorption efficiency is higher than the ion exchange efficiency of the bipolar membrane. It can be seen that the electrodeionization apparatus of this example using porous electrodes is excellent in overall performance.
The bipolar membrane electrodeionization device of the present embodiment may be in a plate frame type or spiral roll type, and may have a rectangular parallelepiped, cube, or cylindrical shape. Fig. 3 and 4 in this embodiment are schematic cross-sectional views, and those skilled in the art can obtain products of various shapes according to the sectional views.
Example 3.
A bipolar membrane electrodeionization apparatus having the same other features as in example 1 except that: the porous electrode is not provided with a collector, and is formed only by laminating a porous material and an ion exchange membrane. The porous material of the present embodiment has a conductive property that satisfies the requirement of conductivity, and therefore, does not need to be provided with a collector.
It should be noted that the specific structure of the two porous electrodes can be flexibly set according to the need, for example, one porous electrode has a collector, the other porous electrode has no collector, or two porous electrodes have collectors at the same time or two porous electrodes have no collectors at the same time, as long as the actual need is met.
Example 4.
A bipolar membrane electrodeionization apparatus having the same other features as in example 1 or 2 except that: the membrane stack comprises a bipolar membrane and a part of a single cation exchange membrane and/or a single anion exchange membrane. The arrangement can realize the desalting function. Only a portion of the channels do not desalinate or regenerate the incoming water stream.
In this case, one arrangement is that the ion exchange membrane on one side of the stack is sequentially arranged with the single cation exchange membrane and the anion exchange membrane in the order of the cation exchange membrane, the anion exchange membrane, the cation exchange membrane, and the anion exchange membrane. The operation in this case is the same as in embodiment 1.
In another arrangement, in the arrangement of the ion exchange membrane on one side of the membrane stack and the single cation exchange membrane and the single anion exchange membrane, two adjacent membranes belong to the same cation exchange membrane or the same anion exchange membrane, in this case, the flow channel formed by the ion exchange membranes of the same kind does not perform desalination or regeneration treatment on the liquid, and the other flow channels operate in the same manner as in example 1.
Example 5.
A bipolar membrane electrodeionization apparatus having the same other features as in any one of examples 1 to 3 except that: the two porous electrodes are both provided with cation exchange membranes, and the bipolar membranes between the porous electrodes are arranged in the same manner. In this way, desalination and regeneration can be achieved, but the effect is inferior to examples 1 and 2, and in the desalination condition, the flow channel formed by the cation exchange membrane of the porous electrode and the cation exchange resin membrane side of the adjacent bipolar membrane only removes cations, but does not remove anions, and the effluent water quality is acidic. Under regeneration conditions, the cation exchange resin membrane of the bipolar membrane adjacent to the cation exchange membrane of the porous electrode is also regenerated. The other flow channels were desalted and regenerated in the same manner as in example 1 or 2.
Example 6.
A bipolar membrane electrodeionization apparatus having the same other features as in any one of examples 1 to 3 except that: both porous electrodes are provided with anion exchange membranes, and the bipolar membranes between the porous electrodes are arranged in the same manner. In this way, desalination and regeneration can be achieved, but the effect is inferior to examples 1 and 2, and in desalination, the flow channel formed by the anion exchange membrane of the porous electrode and the anion exchange resin membrane side of the adjacent bipolar membrane only removes anions, but does not remove cations, and the effluent quality is alkaline. Under the regeneration condition, the flow channel formed by the anion exchange membrane of the porous electrode and the anion exchange resin membrane side of the adjacent bipolar membrane is also regenerated. The other flow channels were desalted and regenerated in the same manner as in example 1 or 2.
Example 7.
A water treatment apparatus having the bipolar membrane electrodeionization device of any one of embodiments 1 to 6, the water treatment apparatus being useful for industrial or domestic water treatment. Examples of uses of industrial water treatment facilities mentioned herein include, but are not limited to, industrial sewage treatment, municipal sewage treatment, seawater desalination, brine treatment, river and lake water treatment, cheese whey demineralization, and the like. The industrial water treatment apparatus includes, in addition to the bipolar membrane electrodeionization device of embodiments of the invention, one or more of, for example, a flocculation and/or coagulation unit, an advanced oxidation unit, an adsorption unit, an electrolysis unit, a membrane separation unit (including one or more of microfiltration, ultrafiltration, nanofiltration and reverse osmosis).
The utility model discloses domestic water treatment facilities, except the utility model discloses bipolar membrane electrodeionization device of embodiment generally still includes for example in ultrafiltration, receive and strain, active carbon adsorption unit, the ultraviolet sterilization unit one or more.
This water treatment facilities, its bipolar membrane electrodeionization device adopt porous electrode and bipolar membrane's structure, can avoid among the prior art problem that the hydrolysis of utmost point room water produced gas and scale deposit, and can improve the desalination, and the system water rate is high, and the water waste is few.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A separator device comprising at least one pair of electrode sets, wherein: the bipolar membrane comprises at least one pair of characteristic electrode groups and more than one bipolar membrane positioned between two electrodes forming the characteristic electrode groups, wherein each characteristic electrode group at least comprises one porous electrode, each bipolar membrane is formed by a cation exchange membrane and an anion exchange membrane which are attached together, and no flow channel is formed between the cation exchange membrane and the anion exchange membrane which form the same bipolar membrane.
2. The separation device of claim 1, wherein: the porous electrode is provided with a porous material.
3. The separation device of claim 2, wherein: the porous material has a porous structure with pore sizes between 0.5 and 50 nanometers.
4. The separation device of claim 2, wherein: the porous material is activated carbon, carbon black, carbon nanotubes, graphite, carbon fibers, carbon cloth, carbon aerogel, metal powder, metal oxide or conductive polymer.
5. The separation device of claim 2, wherein: the porous electrode is also provided with a current collector which is laminated with the porous material.
6. The separation device of claim 5, wherein: the material of the current collector is selected from any one of metal, metal alloy, graphite, graphene, carbon nanotube and conductive plastic.
7. The separation device of claim 2, wherein: the porous electrode is also provided with an ion exchange membrane, and the porous material and the ion exchange membrane are arranged in a stacked mode.
8. The separation device of claim 7, wherein: the ion exchange membrane in the porous electrode is an anion exchange membrane or a cation exchange membrane.
9. The separation device of claim 8, wherein:
a porous electrode having a cation exchange membrane, defined as an anode membrane electrode; the other porous electrode has an anion exchange membrane, defined as a negative membrane electrode;
the anion-exchange membrane in the bipolar membrane closest to the anode electrode faces the anode electrode;
the cation-exchange membrane in the bipolar membrane closest to the cathode electrode faces the cathode electrode.
10. A water treatment apparatus characterized by: having a separation device according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020326664.8U CN212864232U (en) | 2020-03-16 | 2020-03-16 | Separation device and water treatment equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020326664.8U CN212864232U (en) | 2020-03-16 | 2020-03-16 | Separation device and water treatment equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212864232U true CN212864232U (en) | 2021-04-02 |
Family
ID=75185544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020326664.8U Active CN212864232U (en) | 2020-03-16 | 2020-03-16 | Separation device and water treatment equipment thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212864232U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114873698A (en) * | 2022-05-31 | 2022-08-09 | 西北农林科技大学 | Capacitive deionization and water purification device with regenerative electric energy and manufacturing method of separation bin |
| CN115432778A (en) * | 2021-06-03 | 2022-12-06 | 广东栗子科技有限公司 | Bipolar membrane electric auxiliary deionization device, acid making method and application thereof |
| CN115432864A (en) * | 2021-06-03 | 2022-12-06 | 广东栗子科技有限公司 | Bipolar membrane electric auxiliary deionization system and method for improving water production amount thereof |
| CN115432786A (en) * | 2021-06-03 | 2022-12-06 | 广东栗子科技有限公司 | Bipolar membrane electric auxiliary deionization device and low-voltage regeneration method thereof |
| CN115432775A (en) * | 2021-06-03 | 2022-12-06 | 广东栗子科技有限公司 | Bipolar membrane electric auxiliary deionization device and preparation method of alkaline water of bipolar membrane electric auxiliary deionization device |
-
2020
- 2020-03-16 CN CN202020326664.8U patent/CN212864232U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115432778A (en) * | 2021-06-03 | 2022-12-06 | 广东栗子科技有限公司 | Bipolar membrane electric auxiliary deionization device, acid making method and application thereof |
| CN115432864A (en) * | 2021-06-03 | 2022-12-06 | 广东栗子科技有限公司 | Bipolar membrane electric auxiliary deionization system and method for improving water production amount thereof |
| CN115432786A (en) * | 2021-06-03 | 2022-12-06 | 广东栗子科技有限公司 | Bipolar membrane electric auxiliary deionization device and low-voltage regeneration method thereof |
| CN115432775A (en) * | 2021-06-03 | 2022-12-06 | 广东栗子科技有限公司 | Bipolar membrane electric auxiliary deionization device and preparation method of alkaline water of bipolar membrane electric auxiliary deionization device |
| CN114873698A (en) * | 2022-05-31 | 2022-08-09 | 西北农林科技大学 | Capacitive deionization and water purification device with regenerative electric energy and manufacturing method of separation bin |
| CN114873698B (en) * | 2022-05-31 | 2023-10-20 | 西北农林科技大学 | Capacitive deionization water purification device with regenerated electric energy and manufacturing method of separation bin |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212864232U (en) | Separation device and water treatment equipment thereof | |
| JP5816622B2 (en) | Desalination system and method | |
| CN212864231U (en) | Filter core, separator and water treatment facilities | |
| EP2208523B1 (en) | Electrodeionization device with hydrodynamic flow splitting | |
| JP4065664B2 (en) | Electric desalination equipment | |
| US20080035548A1 (en) | Multi-functional filtration and ultra-pure water generator | |
| KR20190061332A (en) | Desalting and power generating hybrid device and method | |
| US20080029395A1 (en) | Multi-functional filtration and ultra-pure water generator | |
| JP2014530755A (en) | Desalination system and method | |
| EP3708544A1 (en) | Hybrid power generation apparatus and method capable of electricity production and deionization simultaneously | |
| CN113401986A (en) | Filter core, separator and treatment facility | |
| KR20190051186A (en) | Hybrid generating device and method for electricity and desalting | |
| CN212142148U (en) | Electrode and separation device using the same | |
| JP2005254241A (en) | Manufacturing method of deionized water producing device | |
| CN212942311U (en) | Separation device and industrial or domestic water treatment equipment | |
| CN212315795U (en) | Composite filter element and water treatment equipment with same | |
| CN113401984A (en) | Separation device and water treatment equipment thereof | |
| CN113398763A (en) | Regeneration method and separation device | |
| JP2014528824A (en) | Desalination system and method | |
| CN212151723U (en) | Membrane, separation device and water treatment equipment | |
| CN212532391U (en) | Filter core and water treatment facilities | |
| CN113401988B (en) | Separation device and water treatment equipment thereof | |
| JP2001049009A (en) | Heterogeneous multi-layered ion exchange film, method and device for manufacturing deionized water using the same | |
| CN212864233U (en) | Filter core and separator thereof | |
| JPH081165A (en) | Electrolytic cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211028 Address after: 528308 No.2, North Xinxi 4th Road, Xiashi village, Lunjiao street, Shunde District, Foshan City, Guangdong Province Patentee after: Guangdong Chestnut Technology Co.,Ltd. Address before: 528300 Nepheline Village Committee, Lunjiao Sub-district Office, Shunde District, Foshan City, Guangdong Province Patentee before: FOSHAN VIOMI ELECTRICAL TECHNOLOGY Co.,Ltd. Patentee before: Chen Xiaoping |