CN114632554A - Powder resin film-free electric deionization device and working process thereof - Google Patents
Powder resin film-free electric deionization device and working process thereof Download PDFInfo
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- CN114632554A CN114632554A CN202210179458.2A CN202210179458A CN114632554A CN 114632554 A CN114632554 A CN 114632554A CN 202210179458 A CN202210179458 A CN 202210179458A CN 114632554 A CN114632554 A CN 114632554A
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- filter element
- cover plate
- exchange resin
- powder
- ion exchange
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- 239000000843 powder Substances 0.000 title claims abstract description 59
- 239000011347 resin Substances 0.000 title claims abstract description 41
- 229920005989 resin Polymers 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000002242 deionisation method Methods 0.000 title 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 claims abstract description 51
- 239000003456 ion exchange resin Substances 0.000 claims abstract description 44
- 229920003303 ion-exchange polymer Polymers 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000011069 regeneration method Methods 0.000 claims description 30
- 230000008929 regeneration Effects 0.000 claims description 29
- 238000009296 electrodeionization Methods 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 11
- 239000003729 cation exchange resin Substances 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 239000003957 anion exchange resin Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- -1 salt ions Chemical class 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 238000011065 in-situ storage Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000010494 dissociation reaction Methods 0.000 claims description 3
- 230000005593 dissociations Effects 0.000 claims description 3
- 230000005684 electric field Effects 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 238000005342 ion exchange Methods 0.000 claims description 3
- CJTCBBYSPFAVFL-UHFFFAOYSA-N iridium ruthenium Chemical compound [Ru].[Ir] CJTCBBYSPFAVFL-UHFFFAOYSA-N 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims 2
- 239000002351 wastewater Substances 0.000 abstract description 5
- 150000002500 ions Chemical class 0.000 abstract description 3
- 238000009713 electroplating Methods 0.000 abstract description 2
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000012498 ultrapure water Substances 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 150000003440 styrenes Chemical class 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/30—Electrical regeneration
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/427—Treatment of water, waste water, or sewage by ion-exchange using mixed beds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a powder resin film-free electric deionizing device and a working process thereof, wherein the device comprises: the filter comprises a shell, an upper cover plate containing an upper connector and a powder resin inlet and outlet, a filter element cathode, a filter element anode, a powder ion exchange resin layer and a lower cover plate containing a lower connector; an O-shaped sealing ring is arranged between the shell and the upper cover plate and between the shell and the lower cover plate, and is locked by a screw rod and a nut; the filter element cathode and the filter element anode are fixed on the upper cover plate; the powder ion exchange resin layer is loaded in a space formed by the filter element cathode, the filter element anode and the upper cover plate. The invention is suitable for the purification of wastewater containing heavy metal ions, such as high-purity water preparation, electroplating rinsing and the like, and the treatment of water and wastewater aiming at removing ionic impurities.
Description
Technical Field
The invention relates to the technical field of electrodeionization, in particular to a powder resin membraneless electrodeionization device and a working process thereof.
Background
The regeneration method of non-membrane ion exchange resin generally utilizes electrode reaction and OH produced by water dissociation-And H+The recovery and regeneration of the spent mixed bed ion exchange resin are carried out due to the omission ofThe method has the advantages of avoiding the defects of blockage, electrode scaling and the like caused by the properties of the membrane, along with the adoption of an expensive ion exchange membrane, and having wide market application prospect in the industrial water supply and sewage treatment industries.
The particle size of the ion exchange resin in the electric regeneration reactor of the membraneless ion exchange resin used in the Chinese patent with the application number of 202020570621.4 is 0.315-1.25mm, and the particle size is larger, so the exchange speed is slower, the working exchange capacity is low, and generally only 20-50% of the theoretical exchange capacity is available; high voltage during regeneration, high energy consumption, low regeneration current density and poor silicate regeneration effect. The particle size of the powder ion exchange resin is 0.03-0.15mm, the specific surface area is large, the exchange speed is high and is more than 100 times of that of the common ion exchange resin, and the working exchange capacity of the unit mass of the powder ion exchange resin can reach 60-95% of the theoretical exchange capacity. During regeneration, the resin amount is less, the particles are compact, the regeneration voltage is low, the energy consumption is low, the regeneration current is high, and the silicate regeneration effect is good.
Disclosure of Invention
According to the proposed particle size of the ion exchange resin arranged in the existing membraneless ion exchange resin electric regeneration reactor is 0.315-1.25mm, the particle size is larger, the exchange speed is slower, the working exchange capacity is low, and generally only 20% -50% of the theoretical exchange capacity is available during treatment; high voltage during regeneration, high energy consumption, low regeneration current density and poor silicate regeneration effect, and provides a powder resin film-free electrodeionization device and a working process thereof. The invention mainly utilizes the filter element cathode, the filter element anode and the powder ion exchange resin layer of the device to separate ions in water and wastewater; meanwhile, the device can also realize the in-situ recovery and regeneration of the powder ion exchange resin layer.
The technical means adopted by the invention are as follows:
a powder resin membraneless electrodeionization device comprising: the box body is sealed, a containing cavity is arranged in the box body, an upper connector and a lower connector are respectively arranged at the upper end and the lower end of the box body, a filter element cathode and a filter element anode are fixed at the upper end of the box body, and the filter element cathode and the filter element anode are both arranged in the containing cavity; the upper interface is positioned above the anode of the filter element and is communicated with the inside of the anode of the filter element; the filter element cathode is wrapped outside the filter element anode;
a powder ion exchange resin layer is loaded in a first space formed by the outer wall of the filter element anode, the upper end of the box body and the inner wall of the filter element cathode, a powder resin inlet and a powder resin outlet are also formed in the upper end of the box body and communicated with the first space, and the powder ion exchange resin layer is loaded in or unloaded from the powder resin inlet and the powder resin outlet;
a second space is formed between the outer wall of the cathode of the filter element and the inner wall of the box body, and the lower connector is communicated with the second space;
the filter element cathode and the filter element anode are respectively connected with an external direct current power supply cathode and an external direct current power supply anode through a cathode conducting rod and an anode conducting rod which are electrically connected.
Furthermore, the box body comprises a shell, an upper cover plate and a lower cover plate, wherein the upper end and the lower end of the shell are respectively fixedly connected with the upper cover plate and the lower cover plate in a sealing manner; the filter element cathode and the filter element anode are fixed on the upper cover plate, the upper connector and the powder resin inlet and outlet are both arranged on the upper cover plate, and the lower connector is arranged on the lower cover plate; the filter element anode outer wall, the upper cover plate inner wall and the filter element cathode inner wall form the first space, and the second space is formed among the filter element cathode outer wall, the upper cover plate inner wall, the shell inner wall and the lower cover plate inner wall.
Furthermore, O-shaped sealing rings are arranged between the shell and the upper cover plate and between the shell and the lower cover plate and are locked through a screw and a nut which are connected in a matched mode.
Furthermore, the shell, the upper cover plate and the lower cover plate are made of glass fiber reinforced plastic or other insulating materials.
Further, the upper interface and the lower interface are coaxially arranged.
Furthermore, the cathode of the filter element is made of 316 or 316L stainless steel or titanium material, and the aperture of the cathode is less than or equal to 5 um.
Furthermore, the anode of the filter element is a ruthenium-iridium plated titanium-based filter element, and the aperture of the filter element is less than or equal to 5 um.
Further, the powder ion exchange resin layer is prepared by mixing weak acid cation exchange resin or strong acid cation exchange resin with the particle size of 0.03-0.15mm and strong base anion exchange resin according to the volume ratio of 1: 1-1: 4 mixing the ion exchange resin evenly.
The invention also provides a working process of the powder resin membraneless electrodeionization device, which comprises the following steps:
during treatment, treated water enters from the upper connector, passes through the anode of the filter element and enters the powder ion exchange resin layer of the first space, electrolytic substances in the water are effectively removed, and purified water flows through the cathode of the filter element and the second space and finally flows out of the device from the lower connector;
during regeneration, pure water enters from the lower interface, flows into the cathode of the filter element, passes through the powder ion exchange resin layer and the anode of the filter element, and finally flows out from the upper interface; when water enters, strong direct current is applied to the powder ion exchange resin layer, a large amount of water is subjected to electric dissociation on the surfaces of the anode and the cathode of the filter element, and a large amount of OH is generated-And H+Meanwhile, the resin interfacial water in the powder ion exchange resin layer is polarized under the action of an electric field, and the interfacial water is dissociated to generate a large amount of OH-And H+OH produced by the above two pathways-And H+The ion exchange reaction is carried out with the salt ions on the ineffective ion exchange resin, the exchanged salt ions flow out of the equipment along with water flow, and the powder ion exchange resin layer is revived and regenerated in situ.
Compared with the prior art, the invention has the following advantages:
1. the powder resin membraneless electrodeionization device provided by the invention has the advantage that the usage amount of the powder ion exchange resin is small.
2. The powder resin film-free electrodeionization device provided by the invention has the advantages of regenerated voltage and low energy consumption.
3. The powder resin film-free electrodeionization device provided by the invention has the advantages of thin resin layer and good desilication effect during regeneration.
4. The powder resin membraneless electrodeionization device provided by the invention is suitable for purifying wastewater containing heavy metal ions such as high-purity water preparation, electroplating rinsing and the like and treating water and wastewater aiming at removing ionic impurities.
In conclusion, the technical scheme of the invention can solve the problems that the particle size of the ion exchange resin in the existing electric regeneration reactor of the membrane-free ion exchange resin is 0.315-1.25mm, and the particle size is larger, the exchange speed is slower, the working exchange capacity is low, and generally only 20-50% of the theoretical exchange capacity exists during treatment; high voltage during regeneration, high energy consumption, low regeneration current density and poor silicate regeneration effect.
Based on the reasons, the invention can be widely popularized in the fields of electrodeionization and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a view showing the structure of the apparatus of the present invention.
In the figure: 1. a cathode conductive rod; 2. powder resin inlet and outlet; 3. an upper interface; 4. an anode conductive rod; 5. an upper cover plate; 6. a screw; 7. a filter element cathode; 8. a filter element anode; 9. a layer of powdered ion exchange resin; 10. a housing; 11. an O-shaped sealing ring; 12. a lower interface; 13. a lower cover plate.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1, the present invention provides a powder resin membraneless electrodeionization device comprising: the filter comprises a shell 10, an upper cover plate 5 (comprising an upper connector 3 and a powder resin inlet and outlet 2), a filter element cathode 7, a filter element anode 8, a powder ion exchange resin layer 9 and a lower cover plate 13 (comprising a lower connector 12), wherein the upper connector and the lower connector are coaxially arranged, and the upper connector is communicated with the inside of the filter element anode 8; an O-shaped sealing ring 11 is arranged between the shell 10 and the upper cover plate 5 and the lower cover plate 13 for sealing and is locked by a plurality of groups of screw rods 6 and nuts, the screw rods are connected with the nuts in a matching way (wherein, a plurality of coaxial mounting holes are arranged on the outer edge of the upper end of the shell and the outer edge of the upper cover plate, the extending ends of the screw rods inserted into the mounting holes are connected with the nuts in a matching way, the O-shaped sealing ring at the upper part is arranged between the outer edge of the upper end of the shell and the connecting part of the outer edge of the upper cover plate; the filter element cathode 7 and the filter element anode 8 are fixed on the upper cover plate 5, and are respectively connected with the cathode conducting rod 1 and the anode conducting rod 4 which are electrically connected with each other by electricity and the cathode and the anode of an external direct current power supply (wherein, the filter element cathode 7 is electrically connected with one end of the cathode conducting rod 1, the other end of the cathode conducting rod 1 penetrates out of the outer end of the upper cover plate and is connected with the cathode of the external direct current power supply; the powder ion exchange resin layer 9 is loaded in a first space formed by the inner wall of the filter element cathode 7, the outer wall of the filter element anode 8 and the inner wall of the upper cover plate 5, and is loaded or unloaded through the powder resin inlet and outlet 2, and the powder resin inlet and outlet 2 is communicated with the first space. And a second space is formed among the outer wall of the filter element cathode 7, the inner wall of the upper cover plate 5, the inner wall of the shell 10 and the inner wall of the lower cover plate 13, and the lower interface 12 is communicated with the second space.
The shell 10, the upper cover plate 5 and the lower cover plate 13 are made of glass fiber reinforced plastic or other insulating materials. The filter element cathode 7 is made of 316 or 316L stainless steel, and the aperture of the filter element cathode is less than or equal to 5 um. The filter element anode 8 is a ruthenium iridium plated titanium-based filter element, and the aperture of the filter element anode is less than or equal to 5 mu m. The powder ion exchange resin layer 9 is prepared by mixing weak acid cation exchange resin or strong acid anion exchange resin with the particle size of 0.03-0.15mm and strong base anion exchange resin according to the volume ratio of 1: 1-1: 4 mixing the mixed resin evenly.
The working process of the powder resin film-free electrodeionization device is as follows:
during treatment, treated water enters from the upper connector 3, passes through the filter element anode 8 and enters the powder ion exchange resin layer 9, electrolytic substances in the water are effectively removed, purified water flows through the filter element cathode 7, and finally flows out of the equipment from the lower connector 12.
During regeneration, pure water enters from the lower port 12, flows into the cathode 7 of the filter element, and passes through the powderIon exchange resin layer 9 and filter element anode 8, and finally flows out from upper connector 3. When water enters, strong direct current is applied to the resin layer, a large amount of water is subjected to electric dissociation on the surfaces of the filter element anode 8 and the filter element cathode 7 to generate a large amount of OH-And H+Meanwhile, the water at the resin interface in the powder ion exchange resin layer 9 is polarized under the action of an electric field, and the water at the interface is dissociated to generate a large amount of OH-And H+OH generated by the above two routes-And H+Ion exchange reaction with the salt ion on the failed ion exchange resin, the exchanged salt ion flows out of the equipment along with water flow, and the powder ion exchange resin layer 9 is revived and regenerated in situ.
Example 1
The powdery resin membraneless electrodeionization device adopts 65ml of mixed resin of 001 x 7 styrene series strongly acidic powdery cation exchange resin and 190ml of mixed resin of 201 x 7 styrene series strongly basic powdery anion exchange resin, and the volume ratio of the powdery anion exchange resin to the powdery cation exchange resin is 1.92: 1. A powder resin membraneless electrodeionization device as shown in FIG. 1 was used for treatment and regeneration. The inner diameter of the cathode of the filter element is 100mm, the height of the cathode of the filter element is 31mm, the inner diameter of the anode of the filter element is 30mm, and the height of the anode of the filter element is 30 mm. The conductivity of inlet water is about 5.0us/cm, the treatment and regeneration time in one working period is 180min and 20min respectively, the constant current regeneration is carried out, the regeneration current is 1.75A, the average regeneration voltage is 50V, the treatment flow rate is 250L/h, the regeneration flow rate is 150L/h, the conductivity of treated outlet water is 0.056-0.070 us/cm, the average content of silicon dioxide is 10ug/L, the average conductivity of concentrated water generated by regeneration is about 150us/cm, the water recovery rate is about 93.3%, and the energy consumption is about 0.04kwh/m3。
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A powder resin membraneless electrodeionization device comprising: the box body is sealed, a containing cavity is formed in the box body, an upper connector (3) and a lower connector (12) are respectively arranged at the upper end and the lower end of the box body, a filter element cathode (7) and a filter element anode (8) are fixed at the upper end of the box body, and the filter element cathode (7) and the filter element anode (8) are both arranged in the containing cavity; the upper connector (3) is positioned above the filter element anode (8) and is communicated with the inside of the filter element anode (8); the filter element cathode (7) is wrapped outside the filter element anode (8);
a powder ion exchange resin layer (9) is loaded in a first space formed by the outer wall of the filter element anode (8), the upper end of the box body and the inner wall of the filter element cathode (7), a powder resin inlet and outlet (2) is further formed in the upper end of the box body, the powder resin inlet and outlet (2) is communicated with the first space, and the powder ion exchange resin layer (9) is loaded or unloaded from the powder resin inlet and outlet (2);
a second space is formed between the outer wall of the filter element cathode (7) and the inner wall of the box body, and the lower interface (12) is communicated with the second space;
and the filter element cathode (7) and the filter element anode (8) are respectively connected with the cathode and the anode of an external direct current power supply through the cathode conducting rod (1) and the anode conducting rod (4).
2. The membraneless electrodeionization device of claim 1, wherein the box comprises a housing (10), an upper cover plate (5) and a lower cover plate (13), wherein the upper end and the lower end of the housing (10) are respectively fixedly connected with the upper cover plate (5) and the lower cover plate (13) in a sealing manner; the filter element cathode (7) and the filter element anode (8) are fixed on the upper cover plate (5), the upper connector (3) and the powder resin inlet and outlet (2) are both arranged on the upper cover plate (5), and the lower connector (12) is arranged on the lower cover plate (13); filter core positive pole (8) outer wall, upper cover plate (5) inner wall and filter core negative pole (7) inner wall form first space, filter core negative pole (7) outer wall, upper cover plate (5) inner wall, casing (10) inner wall and lap down and form between (13) the inner wall the second space.
3. The membraneless electrodeionization device of claim 2, wherein O-rings (11) are provided between the housing (10) and the upper and lower cover plates (5, 13) and locked by screws (6) and nuts.
4. The membraneless electrodeionization device of claim 2 or 3, wherein the housing (10), the upper cover plate (5) and the lower cover plate (13) are made of glass fiber reinforced plastic.
5. The membraneless electrodeionization device of claim 1 or 2, wherein the upper port (3) is arranged coaxially to the lower port (12).
6. The membraneless electrodeionization device of claim 1, wherein the filter element cathode (7) is 316 or 316L stainless steel or titanium with a pore size of 5um or less.
7. The membrane-free electrodeionization apparatus of claim 1, wherein the filter anode (8) is a ruthenium iridium plated titanium based filter with a pore size of 5um or less.
8. The membrane-free electrodeionization apparatus of claim 1, wherein the powder ion exchange resin layer (9) is formed by mixing a weak acid cation exchange resin or a strong acid cation exchange resin with a particle size of 0.03-0.15mm and a strong base anion exchange resin in a volume ratio of 1: 1-1: 4 mixing the ion exchange resin evenly.
9. A process for operating a powder resin membraneless electrodeionization device of any one of claims 1 to 8, comprising the steps of:
during treatment, treated water enters from the upper connector (3), passes through the filter element anode (8) and enters the powder ion exchange resin layer (9) of the first space, electrolytic substances in the water are effectively removed, and purified water flows through the filter element cathode (7) and the second space and finally flows out of the device from the lower connector (12);
during regeneration, pure water enters from the lower connector (12), flows into the filter element cathode (7), passes through the powder ion exchange resin layer (9) and the filter element anode (8), and finally flows out from the upper connector (3); strong direct current is applied to the powder ion exchange resin layer (9) while water enters, and a large amount of water is subjected to electric dissociation on the surfaces of the filter element anode (8) and the filter element cathode (7) to generate a large amount of OH-And H+Meanwhile, the resin interfacial water in the powder ion exchange resin layer (9) is polarized under the action of an electric field, and the interfacial water is dissociated to generate a large amount of OH-And H+OH produced by the above two pathways-And H+The ion exchange reaction is carried out with the salt ions on the ineffective ion exchange resin, the exchanged salt ions flow out of the equipment along with water flow, and the powder ion exchange resin layer (9) can be recovered and regenerated in situ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210179458.2A CN114632554A (en) | 2022-02-25 | 2022-02-25 | Powder resin film-free electric deionization device and working process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210179458.2A CN114632554A (en) | 2022-02-25 | 2022-02-25 | Powder resin film-free electric deionization device and working process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114632554A true CN114632554A (en) | 2022-06-17 |
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| CN202210179458.2A Pending CN114632554A (en) | 2022-02-25 | 2022-02-25 | Powder resin film-free electric deionization device and working process thereof |
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| CN102153166A (en) * | 2011-03-01 | 2011-08-17 | 浙江大学 | Electrodeionization (EDI) method and system dispensing with ion exchange membranes |
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| CN214167433U (en) * | 2020-12-15 | 2021-09-10 | 大连平源环保科技有限公司 | Electrode pair electric deionization equipment |
| CN217856211U (en) * | 2022-02-25 | 2022-11-22 | 万先凯 | Powder resin film-free electric deionizing device |
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| US20120145547A1 (en) * | 2010-12-14 | 2012-06-14 | General Electric Company | Electrical deionization apparatus |
| CN102153166A (en) * | 2011-03-01 | 2011-08-17 | 浙江大学 | Electrodeionization (EDI) method and system dispensing with ion exchange membranes |
| CN211988678U (en) * | 2020-04-16 | 2020-11-24 | 大连平源环保科技有限公司 | Membrane-free ion exchange resin electric regeneration device based on filter element electrode |
| CN112679001A (en) * | 2020-12-14 | 2021-04-20 | 大连平源环保科技有限公司 | Membrane-free electrodeionization continuous water production system based on equivalent filter elements |
| CN214167433U (en) * | 2020-12-15 | 2021-09-10 | 大连平源环保科技有限公司 | Electrode pair electric deionization equipment |
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